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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
//
// Graphics class testing unit
//
// Authors:
// Jordi Mas, jordi@ximian.com
// Sebastien Pouliot <sebastien@ximian.com>
//
// Copyright (C) 2005-2008 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Drawing.Text;
using Microsoft.DotNet.XUnitExtensions;
namespace MonoTests.System.Drawing;
public class GraphicsTest : IDisposable
{
private RectangleF[] _rects;
private readonly Font _font;
public GraphicsTest()
{
try
{
_font = new Font("Arial", 12);
}
catch
{
}
}
public void Dispose()
{
_font?.Dispose();
}
private bool IsEmptyBitmap(Bitmap bitmap, out int x, out int y)
{
bool result = true;
int empty = Color.Empty.ToArgb();
for (y = 0; y < bitmap.Height; y++)
{
for (x = 0; x < bitmap.Width; x++)
{
if (bitmap.GetPixel(x, y).ToArgb() != empty)
return false;
}
}
x = -1;
y = -1;
return result;
}
private void CheckForEmptyBitmap(Bitmap bitmap)
{
int x, y;
if (!IsEmptyBitmap(bitmap, out x, out y))
Assert.Fail($"Position {x},{y}");
}
private void CheckForNonEmptyBitmap(Bitmap bitmap)
{
int x, y;
if (IsEmptyBitmap(bitmap, out x, out y))
Assert.True(false);
}
private void AssertEquals(string msg, object expected, object actual)
{
actual.Should().Be(expected, msg);
}
private void AssertEquals(string msg, double expected, double actual, int precision)
{
actual.Should().BeApproximately(expected, precision, msg);
}
[Fact]
public void DefaultProperties()
{
using Bitmap bmp = new(200, 200);
using Graphics g = Graphics.FromImage(bmp);
using Region r = new();
Assert.Equal(r.GetBounds(g), g.ClipBounds);
Assert.Equal(CompositingMode.SourceOver, g.CompositingMode);
Assert.Equal(CompositingQuality.Default, g.CompositingQuality);
Assert.Equal(InterpolationMode.Bilinear, g.InterpolationMode);
Assert.Equal(1, g.PageScale);
Assert.Equal(GraphicsUnit.Display, g.PageUnit);
Assert.Equal(PixelOffsetMode.Default, g.PixelOffsetMode);
Assert.Equal(new Point(0, 0), g.RenderingOrigin);
Assert.Equal(SmoothingMode.None, g.SmoothingMode);
Assert.Equal(TextRenderingHint.SystemDefault, g.TextRenderingHint);
}
[Fact]
public void SetGetProperties()
{
using Bitmap bmp = new(200, 200);
using Graphics g = Graphics.FromImage(bmp);
g.CompositingMode = CompositingMode.SourceCopy;
g.CompositingQuality = CompositingQuality.GammaCorrected;
g.InterpolationMode = InterpolationMode.HighQualityBilinear;
g.PageScale = 2;
g.PageUnit = GraphicsUnit.Inch;
g.PixelOffsetMode = PixelOffsetMode.Half;
g.RenderingOrigin = new Point(10, 20);
g.SmoothingMode = SmoothingMode.AntiAlias;
g.TextRenderingHint = TextRenderingHint.SystemDefault;
// Clipping set/get tested in clipping functions
Assert.Equal(CompositingMode.SourceCopy, g.CompositingMode);
Assert.Equal(CompositingQuality.GammaCorrected, g.CompositingQuality);
Assert.Equal(InterpolationMode.HighQualityBilinear, g.InterpolationMode);
Assert.Equal(2, g.PageScale);
Assert.Equal(GraphicsUnit.Inch, g.PageUnit);
Assert.Equal(PixelOffsetMode.Half, g.PixelOffsetMode);
Assert.Equal(new Point(10, 20), g.RenderingOrigin);
Assert.Equal(SmoothingMode.AntiAlias, g.SmoothingMode);
Assert.Equal(TextRenderingHint.SystemDefault, g.TextRenderingHint);
}
// Properties
[Fact]
public void Clip()
{
RectangleF[] rects;
using Bitmap bmp = new(200, 200);
using Graphics g = Graphics.FromImage(bmp);
g.Clip = new Region(new Rectangle(50, 40, 210, 220));
rects = g.Clip.GetRegionScans(new Matrix());
Assert.Equal(1, rects.Length);
Assert.Equal(50, rects[0].X);
Assert.Equal(40, rects[0].Y);
Assert.Equal(210, rects[0].Width);
Assert.Equal(220, rects[0].Height);
}
[Fact]
public void Clip_NotAReference()
{
using Bitmap bmp = new(200, 200);
using Graphics g = Graphics.FromImage(bmp);
Assert.True(g.Clip.IsInfinite(g));
g.Clip.IsEmpty(g);
Assert.False(g.Clip.IsEmpty(g));
Assert.True(g.Clip.IsInfinite(g));
}
[Fact]
public void ExcludeClip()
{
using Bitmap bmp = new(200, 200);
using Graphics g = Graphics.FromImage(bmp);
g.Clip = new Region(new RectangleF(10, 10, 100, 100));
g.ExcludeClip(new Rectangle(40, 60, 100, 20));
_rects = g.Clip.GetRegionScans(new Matrix());
Assert.Equal(3, _rects.Length);
Assert.Equal(10, _rects[0].X);
Assert.Equal(10, _rects[0].Y);
Assert.Equal(100, _rects[0].Width);
Assert.Equal(50, _rects[0].Height);
Assert.Equal(10, _rects[1].X);
Assert.Equal(60, _rects[1].Y);
Assert.Equal(30, _rects[1].Width);
Assert.Equal(20, _rects[1].Height);
Assert.Equal(10, _rects[2].X);
Assert.Equal(80, _rects[2].Y);
Assert.Equal(100, _rects[2].Width);
Assert.Equal(30, _rects[2].Height);
}
[Fact]
public void IntersectClip()
{
using Bitmap bmp = new(200, 200);
using Graphics g = Graphics.FromImage(bmp);
g.Clip = new Region(new RectangleF(260, 30, 60, 80));
g.IntersectClip(new Rectangle(290, 40, 60, 80));
_rects = g.Clip.GetRegionScans(new Matrix());
Assert.Equal(1, _rects.Length);
Assert.Equal(290, _rects[0].X);
Assert.Equal(40, _rects[0].Y);
Assert.Equal(30, _rects[0].Width);
Assert.Equal(70, _rects[0].Height);
}
[Fact]
public void ResetClip()
{
using Bitmap bmp = new(200, 200);
using Graphics g = Graphics.FromImage(bmp);
g.Clip = new Region(new RectangleF(260, 30, 60, 80));
g.IntersectClip(new Rectangle(290, 40, 60, 80));
g.ResetClip();
_rects = g.Clip.GetRegionScans(new Matrix());
Assert.Equal(1, _rects.Length);
Assert.Equal(-4194304, _rects[0].X);
Assert.Equal(-4194304, _rects[0].Y);
Assert.Equal(8388608, _rects[0].Width);
Assert.Equal(8388608, _rects[0].Height);
}
[Fact]
public void SetClip()
{
RectangleF[] rects;
using Bitmap bmp = new(200, 200);
using (Graphics g = Graphics.FromImage(bmp))
{
// Region
g.SetClip(new Region(new Rectangle(50, 40, 210, 220)), CombineMode.Replace);
rects = g.Clip.GetRegionScans(new Matrix());
Assert.Equal(1, rects.Length);
Assert.Equal(50, rects[0].X);
Assert.Equal(40, rects[0].Y);
Assert.Equal(210, rects[0].Width);
Assert.Equal(220, rects[0].Height);
}
// RectangleF
using (Graphics g = Graphics.FromImage(bmp))
{
g.SetClip(new RectangleF(50, 40, 210, 220));
rects = g.Clip.GetRegionScans(new Matrix());
Assert.Equal(1, rects.Length);
Assert.Equal(50, rects[0].X);
Assert.Equal(40, rects[0].Y);
Assert.Equal(210, rects[0].Width);
Assert.Equal(220, rects[0].Height);
}
// Rectangle
using (Graphics g = Graphics.FromImage(bmp))
{
g.SetClip(new Rectangle(50, 40, 210, 220));
rects = g.Clip.GetRegionScans(new Matrix());
Assert.Equal(1, rects.Length);
Assert.Equal(50, rects[0].X);
Assert.Equal(40, rects[0].Y);
Assert.Equal(210, rects[0].Width);
Assert.Equal(220, rects[0].Height);
}
}
[Fact]
public void SetSaveReset()
{
using Bitmap bmp = new(200, 200);
using Graphics g = Graphics.FromImage(bmp);
GraphicsState state_default, state_modified;
state_default = g.Save(); // Default
g.CompositingMode = CompositingMode.SourceCopy;
g.CompositingQuality = CompositingQuality.GammaCorrected;
g.InterpolationMode = InterpolationMode.HighQualityBilinear;
g.PageScale = 2;
g.PageUnit = GraphicsUnit.Inch;
g.PixelOffsetMode = PixelOffsetMode.Half;
g.Clip = new Region(new Rectangle(0, 0, 100, 100));
g.RenderingOrigin = new Point(10, 20);
g.SmoothingMode = SmoothingMode.AntiAlias;
g.TextRenderingHint = TextRenderingHint.ClearTypeGridFit;
state_modified = g.Save(); // Modified
g.CompositingMode = CompositingMode.SourceOver;
g.CompositingQuality = CompositingQuality.Default;
g.InterpolationMode = InterpolationMode.Bilinear;
g.PageScale = 5;
g.PageUnit = GraphicsUnit.Display;
g.PixelOffsetMode = PixelOffsetMode.Default;
g.Clip = new Region(new Rectangle(1, 2, 20, 25));
g.RenderingOrigin = new Point(5, 6);
g.SmoothingMode = SmoothingMode.None;
g.TextRenderingHint = TextRenderingHint.SystemDefault;
g.Restore(state_modified);
Assert.Equal(CompositingMode.SourceCopy, g.CompositingMode);
Assert.Equal(CompositingQuality.GammaCorrected, g.CompositingQuality);
Assert.Equal(InterpolationMode.HighQualityBilinear, g.InterpolationMode);
Assert.Equal(2, g.PageScale);
Assert.Equal(GraphicsUnit.Inch, g.PageUnit);
Assert.Equal(PixelOffsetMode.Half, g.PixelOffsetMode);
Assert.Equal(new Point(10, 20), g.RenderingOrigin);
Assert.Equal(SmoothingMode.AntiAlias, g.SmoothingMode);
Assert.Equal(TextRenderingHint.ClearTypeGridFit, g.TextRenderingHint);
Assert.Equal(0, (int)g.ClipBounds.X);
Assert.Equal(0, (int)g.ClipBounds.Y);
g.Restore(state_default);
Assert.Equal(CompositingMode.SourceOver, g.CompositingMode);
Assert.Equal(CompositingQuality.Default, g.CompositingQuality);
Assert.Equal(InterpolationMode.Bilinear, g.InterpolationMode);
Assert.Equal(1, g.PageScale);
Assert.Equal(GraphicsUnit.Display, g.PageUnit);
Assert.Equal(PixelOffsetMode.Default, g.PixelOffsetMode);
Assert.Equal(new Point(0, 0), g.RenderingOrigin);
Assert.Equal(SmoothingMode.None, g.SmoothingMode);
Assert.Equal(TextRenderingHint.SystemDefault, g.TextRenderingHint);
Region r = new();
Assert.Equal(r.GetBounds(g), g.ClipBounds);
}
[Fact]
public void LoadIndexed_BmpFile()
{
// Tests that we can load an indexed file, but...
string sInFile = Helpers.GetTestBitmapPath("almogaver1bit.bmp");
// note: file is misnamed (it's a 4bpp bitmap)
using Image img = Image.FromFile(sInFile);
Assert.Equal(PixelFormat.Format4bppIndexed, img.PixelFormat);
Exception exception = AssertExtensions.Throws<ArgumentException, Exception>(() => Graphics.FromImage(img));
if (exception is ArgumentException argumentException)
Assert.Equal("image", argumentException.ParamName);
}
private class BitmapAndGraphics : IDisposable
{
private readonly Bitmap _bitmap;
public Graphics Graphics { get; }
public BitmapAndGraphics(int width, int height)
{
_bitmap = new Bitmap(width, height);
Graphics = Graphics.FromImage(_bitmap);
Graphics.Clip = new Region(new Rectangle(0, 0, width, height));
}
public void Dispose() { Graphics.Dispose(); _bitmap.Dispose(); }
}
private void Compare(string msg, RectangleF b1, RectangleF b2)
{
AssertEquals(msg + ".compare.X", b1.X, b2.X);
AssertEquals(msg + ".compare.Y", b1.Y, b2.Y);
AssertEquals(msg + ".compare.Width", b1.Width, b2.Width);
AssertEquals(msg + ".compare.Height", b1.Height, b2.Height);
}
[Fact]
public void Clip_GetBounds()
{
using BitmapAndGraphics b = new(16, 16);
var g = b.Graphics;
RectangleF bounds = g.Clip.GetBounds(g);
Assert.Equal(0, bounds.X);
Assert.Equal(0, bounds.Y);
Assert.Equal(16, bounds.Width);
Assert.Equal(16, bounds.Height);
Assert.True(g.Transform.IsIdentity);
}
[Fact]
public void Clip_TranslateTransform()
{
using BitmapAndGraphics b = new(16, 16);
var g = b.Graphics;
g.TranslateTransform(12.22f, 10.10f);
RectangleF bounds = g.Clip.GetBounds(g);
Compare("translate", bounds, g.ClipBounds);
Assert.Equal(-12.2200003f, bounds.X);
Assert.Equal(-10.1000004f, bounds.Y);
Assert.Equal(16, bounds.Width);
Assert.Equal(16, bounds.Height);
float[] elements = g.Transform.Elements;
Assert.Equal(1, elements[0]);
Assert.Equal(0, elements[1]);
Assert.Equal(0, elements[2]);
Assert.Equal(1, elements[3]);
Assert.Equal(12.2200003f, elements[4]);
Assert.Equal(10.1000004f, elements[5]);
g.ResetTransform();
bounds = g.Clip.GetBounds(g);
Compare("reset", bounds, g.ClipBounds);
Assert.Equal(0, bounds.X);
Assert.Equal(0, bounds.Y);
Assert.Equal(16, bounds.Width);
Assert.Equal(16, bounds.Height);
Assert.True(g.Transform.IsIdentity);
}
[Fact]
public void Transform_NonInvertibleMatrix()
{
using Matrix matrix = new(123, 24, 82, 16, 47, 30);
using BitmapAndGraphics b = new(16, 16);
Assert.False(matrix.IsInvertible);
var g = b.Graphics;
Assert.Throws<ArgumentException>(() => g.Transform = matrix);
}
[Fact]
public void Multiply_NonInvertibleMatrix()
{
using Matrix matrix = new(123, 24, 82, 16, 47, 30);
using BitmapAndGraphics b = new(16, 16);
Assert.False(matrix.IsInvertible);
var g = b.Graphics;
Assert.Throws<ArgumentException>(() => g.MultiplyTransform(matrix));
}
private void CheckBounds(string msg, RectangleF bounds, float x, float y, float w, float h)
{
AssertEquals(msg + ".X", x, bounds.X, 1);
AssertEquals(msg + ".Y", y, bounds.Y, 1);
AssertEquals(msg + ".Width", w, bounds.Width, 1);
AssertEquals(msg + ".Height", h, bounds.Height, 1);
}
[Fact]
public void ClipBounds()
{
using BitmapAndGraphics b = new(16, 16);
var g = b.Graphics;
CheckBounds("graphics.ClipBounds", g.ClipBounds, 0, 0, 16, 16);
CheckBounds("graphics.Clip.GetBounds", g.Clip.GetBounds(g), 0, 0, 16, 16);
g.Clip = new Region(new Rectangle(0, 0, 8, 8));
CheckBounds("clip.ClipBounds", g.ClipBounds, 0, 0, 8, 8);
CheckBounds("clip.Clip.GetBounds", g.Clip.GetBounds(g), 0, 0, 8, 8);
}
[Fact]
public void ClipBounds_Rotate()
{
using BitmapAndGraphics b = new(16, 16);
var g = b.Graphics;
g.Clip = new Region(new Rectangle(0, 0, 8, 8));
g.RotateTransform(90);
CheckBounds("rotate.ClipBounds", g.ClipBounds, 0, -8, 8, 8);
CheckBounds("rotate.Clip.GetBounds", g.Clip.GetBounds(g), 0, -8, 8, 8);
g.Transform = new Matrix();
CheckBounds("identity.ClipBounds", g.Clip.GetBounds(g), 0, 0, 8, 8);
CheckBounds("identity.Clip.GetBounds", g.Clip.GetBounds(g), 0, 0, 8, 8);
}
[Fact]
public void ClipBounds_Scale()
{
RectangleF clip = new Rectangle(0, 0, 8, 8);
using BitmapAndGraphics b = new(16, 16);
var g = b.Graphics;
g.Clip = new Region(clip);
g.ScaleTransform(0.25f, 0.5f);
CheckBounds("scale.ClipBounds", g.ClipBounds, 0, 0, 32, 16);
CheckBounds("scale.Clip.GetBounds", g.Clip.GetBounds(g), 0, 0, 32, 16);
g.SetClip(clip);
CheckBounds("setclip.ClipBounds", g.ClipBounds, 0, 0, 8, 8);
CheckBounds("setclip.Clip.GetBounds", g.Clip.GetBounds(g), 0, 0, 8, 8);
}
[Fact]
public void ClipBounds_Translate()
{
using BitmapAndGraphics b = new(16, 16);
var g = b.Graphics;
g.Clip = new Region(new Rectangle(0, 0, 8, 8));
using Region clone = g.Clip.Clone();
g.TranslateTransform(8, 8);
CheckBounds("translate.ClipBounds", g.ClipBounds, -8, -8, 8, 8);
CheckBounds("translate.Clip.GetBounds", g.Clip.GetBounds(g), -8, -8, 8, 8);
g.SetClip(clone, CombineMode.Replace);
CheckBounds("setclip.ClipBounds", g.Clip.GetBounds(g), 0, 0, 8, 8);
CheckBounds("setclip.Clip.GetBounds", g.Clip.GetBounds(g), 0, 0, 8, 8);
}
[Fact]
public void ClipBounds_Transform_Translation()
{
using BitmapAndGraphics b = new(16, 16);
var g = b.Graphics;
g.Clip = new Region(new Rectangle(0, 0, 8, 8));
g.Transform = new Matrix(1, 0, 0, 1, 8, 8);
CheckBounds("transform.ClipBounds", g.ClipBounds, -8, -8, 8, 8);
CheckBounds("transform.Clip.GetBounds", g.Clip.GetBounds(g), -8, -8, 8, 8);
g.ResetTransform();
CheckBounds("reset.ClipBounds", g.ClipBounds, 0, 0, 8, 8);
CheckBounds("reset.Clip.GetBounds", g.Clip.GetBounds(g), 0, 0, 8, 8);
}
[Fact]
public void ClipBounds_Transform_Scale()
{
using BitmapAndGraphics b = new(16, 16);
var g = b.Graphics;
g.Clip = new Region(new Rectangle(0, 0, 8, 8));
g.Transform = new Matrix(0.5f, 0, 0, 0.25f, 0, 0);
CheckBounds("scale.ClipBounds", g.ClipBounds, 0, 0, 16, 32);
CheckBounds("scale.Clip.GetBounds", g.Clip.GetBounds(g), 0, 0, 16, 32);
g.ResetClip();
// see next test for ClipBounds
CheckBounds("resetclip.Clip.GetBounds", g.Clip.GetBounds(g), -4194304, -4194304, 8388608, 8388608);
Assert.True(g.Clip.IsInfinite(g));
}
[Fact]
public void ClipBounds_Multiply()
{
using BitmapAndGraphics b = new(16, 16);
var g = b.Graphics;
g.Clip = new Region(new Rectangle(0, 0, 8, 8));
g.Transform = new Matrix(1, 0, 0, 1, 8, 8);
g.MultiplyTransform(g.Transform);
CheckBounds("multiply.ClipBounds", g.ClipBounds, -16, -16, 8, 8);
CheckBounds("multiply.Clip.GetBounds", g.Clip.GetBounds(g), -16, -16, 8, 8);
g.ResetTransform();
CheckBounds("reset.ClipBounds", g.ClipBounds, 0, 0, 8, 8);
CheckBounds("reset.Clip.GetBounds", g.Clip.GetBounds(g), 0, 0, 8, 8);
}
[Fact]
public void ClipBounds_Cumulative_Effects()
{
using BitmapAndGraphics b = new(16, 16);
var g = b.Graphics;
CheckBounds("graphics.ClipBounds", g.ClipBounds, 0, 0, 16, 16);
CheckBounds("graphics.Clip.GetBounds", g.Clip.GetBounds(g), 0, 0, 16, 16);
g.Clip = new Region(new Rectangle(0, 0, 8, 8));
CheckBounds("clip.ClipBounds", g.ClipBounds, 0, 0, 8, 8);
CheckBounds("clip.Clip.GetBounds", g.Clip.GetBounds(g), 0, 0, 8, 8);
g.RotateTransform(90);
CheckBounds("rotate.ClipBounds", g.ClipBounds, 0, -8, 8, 8);
CheckBounds("rotate.Clip.GetBounds", g.Clip.GetBounds(g), 0, -8, 8, 8);
g.ScaleTransform(0.25f, 0.5f);
CheckBounds("scale.ClipBounds", g.ClipBounds, 0, -16, 32, 16);
CheckBounds("scale.Clip.GetBounds", g.Clip.GetBounds(g), 0, -16, 32, 16);
g.TranslateTransform(8, 8);
CheckBounds("translate.ClipBounds", g.ClipBounds, -8, -24, 32, 16);
CheckBounds("translate.Clip.GetBounds", g.Clip.GetBounds(g), -8, -24, 32, 16);
g.MultiplyTransform(g.Transform);
CheckBounds("multiply.ClipBounds", g.ClipBounds, -104, -56, 64, 64);
CheckBounds("multiply.Clip.GetBounds", g.Clip.GetBounds(g), -104, -56, 64, 64);
g.ResetTransform();
CheckBounds("reset.ClipBounds", g.ClipBounds, 0, 0, 8, 8);
CheckBounds("reset.Clip.GetBounds", g.Clip.GetBounds(g), 0, 0, 8, 8);
}
[Fact]
public void Clip_TranslateTransform_BoundsChange()
{
using BitmapAndGraphics b = new(16, 16);
var g = b.Graphics;
CheckBounds("graphics.ClipBounds", g.ClipBounds, 0, 0, 16, 16);
CheckBounds("graphics.Clip.GetBounds", g.Clip.GetBounds(g), 0, 0, 16, 16);
g.TranslateTransform(-16, -16);
CheckBounds("translated.ClipBounds", g.ClipBounds, 16, 16, 16, 16);
CheckBounds("translated.Clip.GetBounds", g.Clip.GetBounds(g), 16, 16, 16, 16);
g.Clip = new Region(new Rectangle(0, 0, 8, 8));
// ClipBounds isn't affected by a previous translation
CheckBounds("rectangle.ClipBounds", g.ClipBounds, 0, 0, 8, 8);
// Clip.GetBounds isn't affected by a previous translation
CheckBounds("rectangle.Clip.GetBounds", g.Clip.GetBounds(g), 0, 0, 8, 8);
g.ResetTransform();
CheckBounds("reseted.ClipBounds", g.ClipBounds, -16, -16, 8, 8);
CheckBounds("reseted.Clip.GetBounds", g.Clip.GetBounds(g), -16, -16, 8, 8);
}
[Fact]
public void Clip_RotateTransform_BoundsChange()
{
using BitmapAndGraphics b = new(16, 16);
var g = b.Graphics;
CheckBounds("graphics.ClipBounds", g.ClipBounds, 0, 0, 16, 16);
CheckBounds("graphics.Clip.GetBounds", g.Clip.GetBounds(g), 0, 0, 16, 16);
// we select a "simple" angle because the region will be converted into
// a bitmap (well for libgdiplus) and we would lose precision after that
g.RotateTransform(90);
CheckBounds("rotated.ClipBounds", g.ClipBounds, 0, -16, 16, 16);
CheckBounds("rotated.Clip.GetBounds", g.Clip.GetBounds(g), 0, -16, 16, 16);
g.Clip = new Region(new Rectangle(0, 0, 8, 8));
// ClipBounds isn't affected by a previous rotation (90)
CheckBounds("rectangle.ClipBounds", g.ClipBounds, 0, 0, 8, 8);
// Clip.GetBounds isn't affected by a previous rotation
CheckBounds("rectangle.Clip.GetBounds", g.Clip.GetBounds(g), 0, 0, 8, 8);
g.ResetTransform();
CheckBounds("reseted.ClipBounds", g.ClipBounds, -8, 0, 8, 8);
CheckBounds("reseted.Clip.GetBounds", g.Clip.GetBounds(g), -8, 0, 8, 8);
}
[Fact]
public void Clip_ScaleTransform_NoBoundsChange()
{
using BitmapAndGraphics b = new(16, 16);
var g = b.Graphics;
CheckBounds("graphics.ClipBounds", g.ClipBounds, 0, 0, 16, 16);
CheckBounds("graphics.Clip.GetBounds", g.Clip.GetBounds(g), 0, 0, 16, 16);
g.ScaleTransform(2, 0.5f);
CheckBounds("scaled.ClipBounds", g.ClipBounds, 0, 0, 8, 32);
CheckBounds("scaled.Clip.GetBounds", g.Clip.GetBounds(g), 0, 0, 8, 32);
g.Clip = new Region(new Rectangle(0, 0, 8, 8));
// ClipBounds isn't affected by a previous scaling
CheckBounds("rectangle.ClipBounds", g.ClipBounds, 0, 0, 8, 8);
// Clip.GetBounds isn't affected by a previous scaling
CheckBounds("rectangle.Clip.GetBounds", g.Clip.GetBounds(g), 0, 0, 8, 8);
g.ResetTransform();
CheckBounds("reseted.ClipBounds", g.ClipBounds, 0, 0, 16, 4);
CheckBounds("reseted.Clip.GetBounds", g.Clip.GetBounds(g), 0, 0, 16, 4);
}
[Fact]
public void ScaleTransform_X0()
{
using BitmapAndGraphics b = new(16, 16);
var g = b.Graphics;
Assert.Throws<ArgumentException>(() => g.ScaleTransform(0, 1));
}
[Fact]
public void ScaleTransform_Y0()
{
using BitmapAndGraphics b = new(16, 16);
var g = b.Graphics;
Assert.Throws<ArgumentException>(() => g.ScaleTransform(1, 0));
}
[Fact]
public void TranslateTransform_Order()
{
using BitmapAndGraphics b = new(16, 16);
var g = b.Graphics;
g.Transform = new Matrix(1, 2, 3, 4, 5, 6);
g.TranslateTransform(3, -3);
float[] elements = g.Transform.Elements;
Assert.Equal(1, elements[0]);
Assert.Equal(2, elements[1]);
Assert.Equal(3, elements[2]);
Assert.Equal(4, elements[3]);
Assert.Equal(-1, elements[4]);
Assert.Equal(0, elements[5]);
g.Transform = new Matrix(1, 2, 3, 4, 5, 6);
g.TranslateTransform(3, -3, MatrixOrder.Prepend);
elements = g.Transform.Elements;
Assert.Equal(1, elements[0]);
Assert.Equal(2, elements[1]);
Assert.Equal(3, elements[2]);
Assert.Equal(4, elements[3]);
Assert.Equal(-1, elements[4]);
Assert.Equal(0, elements[5]);
g.Transform = new Matrix(1, 2, 3, 4, 5, 6);
g.TranslateTransform(3, -3, MatrixOrder.Append);
elements = g.Transform.Elements;
Assert.Equal(1, elements[0]);
Assert.Equal(2, elements[1]);
Assert.Equal(3, elements[2]);
Assert.Equal(4, elements[3]);
Assert.Equal(8, elements[4]);
Assert.Equal(3, elements[5]);
}
private static readonly PointF[] s_smallCurveF = [new(0, 0), new(15, 5), new(5, 15)];
private static readonly Point[] s_tooSmallCurve = [new(0, 0), new(15, 5)];
private static readonly PointF[] s_largeCurveF = [new(0, 0), new(15, 5), new(5, 15), new(0, 20)];
[Fact]
public void DrawCurve_NotEnoughPoints()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
CheckForEmptyBitmap(bitmap);
g.DrawCurve(Pens.Black, s_tooSmallCurve, 0.5f);
CheckForNonEmptyBitmap(bitmap);
// so a "curve" can be drawn with less than 3 points!
// actually I used to call that a line... (and it's not related to tension)
g.Dispose();
bitmap.Dispose();
}
[Fact]
public void DrawCurve_SinglePoint()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
Assert.Throws<ArgumentException>(() => g.DrawCurve(Pens.Black, new Point[1] { new(10, 10) }, 0.5f));
// a single point isn't enough
}
[Fact]
public void DrawCurve3_NotEnoughPoints()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
Assert.Throws<ArgumentException>(() => g.DrawCurve(Pens.Black, s_tooSmallCurve, 0, 2, 0.5f));
// aha, this is API dependent
}
[Fact]
public void DrawCurve_NegativeTension()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
// documented as bigger (or equals) to 0
g.DrawCurve(Pens.Black, s_smallCurveF, -0.9f);
CheckForNonEmptyBitmap(bitmap);
g.Dispose();
bitmap.Dispose();
}
[Fact]
public void DrawCurve_PositiveTension()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
g.DrawCurve(Pens.Black, s_smallCurveF, 0.9f);
// this is not the same as -1
CheckForNonEmptyBitmap(bitmap);
g.Dispose();
bitmap.Dispose();
}
[Fact]
public void DrawCurve_ZeroSegments()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
Assert.Throws<ArgumentException>(() => g.DrawCurve(Pens.Black, s_smallCurveF, 0, 0));
}
[Fact]
public void DrawCurve_NegativeSegments()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
Assert.Throws<ArgumentException>(() => g.DrawCurve(Pens.Black, s_smallCurveF, 0, -1));
}
[Fact]
public void DrawCurve_OffsetTooLarge()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
// starting offset 1 doesn't give 3 points to make a curve
Assert.Throws<ArgumentException>(() => g.DrawCurve(Pens.Black, s_smallCurveF, 1, 2));
// and in this case 2 points aren't enough to draw something
}
[Fact]
public void DrawCurve_Offset_0()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
g.DrawCurve(Pens.Black, s_largeCurveF, 0, 2, 0.5f);
CheckForNonEmptyBitmap(bitmap);
g.Dispose();
bitmap.Dispose();
}
[Fact]
public void DrawCurve_Offset_1()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
g.DrawCurve(Pens.Black, s_largeCurveF, 1, 2, 0.5f);
CheckForNonEmptyBitmap(bitmap);
g.Dispose();
bitmap.Dispose();
}
[Fact]
public void DrawCurve_Offset_2()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
// it works even with two points because we know the previous ones
g.DrawCurve(Pens.Black, s_largeCurveF, 2, 1, 0.5f);
CheckForNonEmptyBitmap(bitmap);
g.Dispose();
bitmap.Dispose();
}
[Fact]
public void DrawRectangle_Negative()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
using Pen pen = new(Color.Red);
g.DrawRectangle(pen, 5, 5, -10, -10);
g.DrawRectangle(pen, 0.0f, 0.0f, 5.0f, -10.0f);
g.DrawRectangle(pen, new Rectangle(15, 0, -10, 5));
CheckForEmptyBitmap(bitmap);
pen.Dispose();
g.Dispose();
bitmap.Dispose();
}
[Fact]
public void DrawRectangles_Negative()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
using Pen pen = new(Color.Red);
Rectangle[] rects = [
new(5, 5, -10, -10),
new(0, 0, 5, -10)
];
RectangleF[] rectf = [
new(0.0f, 5.0f, -10.0f, -10.0f),
new(15.0f, 0.0f, -10.0f, 5.0f)
];
g.DrawRectangles(pen, rects);
g.DrawRectangles(pen, rectf);
CheckForEmptyBitmap(bitmap);
pen.Dispose();
g.Dispose();
bitmap.Dispose();
}
[Fact]
public void FillRectangle_Negative()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
using SolidBrush brush = new(Color.Red);
g.FillRectangle(brush, 5, 5, -10, -10);
g.FillRectangle(brush, 0.0f, 0.0f, 5.0f, -10.0f);
g.FillRectangle(brush, new Rectangle(15, 0, -10, 5));
CheckForEmptyBitmap(bitmap);
brush.Dispose();
g.Dispose();
bitmap.Dispose();
}
[Fact]
public void FillRectangles_Negative()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
using SolidBrush brush = new(Color.Red);
Rectangle[] rects = [
new(5, 5, -10, -10),
new(0, 0, 5, -10)
];
RectangleF[] rectf = [
new(0.0f, 5.0f, -10.0f, -10.0f),
new(15.0f, 0.0f, -10.0f, 5.0f)
];
g.FillRectangles(brush, rects);
g.FillRectangles(brush, rectf);
CheckForEmptyBitmap(bitmap);
brush.Dispose();
g.Dispose();
bitmap.Dispose();
}
private void CheckDefaultProperties(string message, Graphics g)
{
Assert.True(g.Clip.IsInfinite(g), message + ".Clip.IsInfinite");
AssertEquals(message + ".CompositingMode", CompositingMode.SourceOver, g.CompositingMode);
AssertEquals(message + ".CompositingQuality", CompositingQuality.Default, g.CompositingQuality);
AssertEquals(message + ".InterpolationMode", InterpolationMode.Bilinear, g.InterpolationMode);
AssertEquals(message + ".PageScale", 1.0f, g.PageScale);
AssertEquals(message + ".PageUnit", GraphicsUnit.Display, g.PageUnit);
AssertEquals(message + ".PixelOffsetMode", PixelOffsetMode.Default, g.PixelOffsetMode);
AssertEquals(message + ".SmoothingMode", SmoothingMode.None, g.SmoothingMode);
AssertEquals(message + ".TextContrast", 4, g.TextContrast);
AssertEquals(message + ".TextRenderingHint", TextRenderingHint.SystemDefault, g.TextRenderingHint);
Assert.True(g.Transform.IsIdentity, message + ".Transform.IsIdentity");
}
private void CheckCustomProperties(string message, Graphics g)
{
Assert.False(g.Clip.IsInfinite(g), message + ".Clip.IsInfinite");
AssertEquals(message + ".CompositingMode", CompositingMode.SourceCopy, g.CompositingMode);
AssertEquals(message + ".CompositingQuality", CompositingQuality.HighQuality, g.CompositingQuality);
AssertEquals(message + ".InterpolationMode", InterpolationMode.HighQualityBicubic, g.InterpolationMode);
AssertEquals(message + ".PageScale", 0.5f, g.PageScale);
AssertEquals(message + ".PageUnit", GraphicsUnit.Inch, g.PageUnit);
AssertEquals(message + ".PixelOffsetMode", PixelOffsetMode.Half, g.PixelOffsetMode);
AssertEquals(message + ".RenderingOrigin", new Point(-1, -1), g.RenderingOrigin);
AssertEquals(message + ".SmoothingMode", SmoothingMode.AntiAlias, g.SmoothingMode);
AssertEquals(message + ".TextContrast", 0, g.TextContrast);
AssertEquals(message + ".TextRenderingHint", TextRenderingHint.AntiAlias, g.TextRenderingHint);
Assert.False(g.Transform.IsIdentity, message + ".Transform.IsIdentity");
}
private void CheckMatrix(string message, Matrix m, float xx, float yx, float xy, float yy, float x0, float y0)
{
float[] elements = m.Elements;
AssertEquals(message + ".Matrix.xx", xx, elements[0], 2);
AssertEquals(message + ".Matrix.yx", yx, elements[1], 2);
AssertEquals(message + ".Matrix.xy", xy, elements[2], 2);
AssertEquals(message + ".Matrix.yy", yy, elements[3], 2);
AssertEquals(message + ".Matrix.x0", x0, elements[4], 2);
AssertEquals(message + ".Matrix.y0", y0, elements[5], 2);
}
[Fact]
public void BeginContainer()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
CheckDefaultProperties("default", g);
Assert.Equal(new Point(0, 0), g.RenderingOrigin);
g.Clip = new Region(new Rectangle(10, 10, 10, 10));
g.CompositingMode = CompositingMode.SourceCopy;
g.CompositingQuality = CompositingQuality.HighQuality;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.PageScale = 0.5f;
g.PageUnit = GraphicsUnit.Inch;
g.PixelOffsetMode = PixelOffsetMode.Half;
g.RenderingOrigin = new Point(-1, -1);
g.RotateTransform(45);
g.SmoothingMode = SmoothingMode.AntiAlias;
g.TextContrast = 0;
g.TextRenderingHint = TextRenderingHint.AntiAlias;
CheckCustomProperties("modified", g);
CheckMatrix("modified.Transform", g.Transform, 0.707f, 0.707f, -0.707f, 0.707f, 0, 0);
GraphicsContainer gc = g.BeginContainer();
// things gets reseted after calling BeginContainer
CheckDefaultProperties("BeginContainer", g);
// but not everything
Assert.Equal(new Point(-1, -1), g.RenderingOrigin);
g.EndContainer(gc);
CheckCustomProperties("EndContainer", g);
}
[Fact]
public void BeginContainer_Rect()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
CheckDefaultProperties("default", g);
Assert.Equal(new Point(0, 0), g.RenderingOrigin);
g.Clip = new Region(new Rectangle(10, 10, 10, 10));
g.CompositingMode = CompositingMode.SourceCopy;
g.CompositingQuality = CompositingQuality.HighQuality;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.PageScale = 0.5f;
g.PageUnit = GraphicsUnit.Inch;
g.PixelOffsetMode = PixelOffsetMode.Half;
g.RenderingOrigin = new Point(-1, -1);
g.RotateTransform(45);
g.SmoothingMode = SmoothingMode.AntiAlias;
g.TextContrast = 0;
g.TextRenderingHint = TextRenderingHint.AntiAlias;
CheckCustomProperties("modified", g);
CheckMatrix("modified.Transform", g.Transform, 0.707f, 0.707f, -0.707f, 0.707f, 0, 0);
GraphicsContainer gc = g.BeginContainer(new Rectangle(10, 20, 30, 40), new Rectangle(10, 20, 300, 400), GraphicsUnit.Millimeter);
// things gets reseted after calling BeginContainer
CheckDefaultProperties("BeginContainer", g);
// but not everything
Assert.Equal(new Point(-1, -1), g.RenderingOrigin);
g.EndContainer(gc);
CheckCustomProperties("EndContainer", g);
CheckMatrix("EndContainer.Transform", g.Transform, 0.707f, 0.707f, -0.707f, 0.707f, 0, 0);
}
[Fact]
public void BeginContainer_RectF()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
CheckDefaultProperties("default", g);
Assert.Equal(new Point(0, 0), g.RenderingOrigin);
g.Clip = new Region(new Rectangle(10, 10, 10, 10));
g.CompositingMode = CompositingMode.SourceCopy;
g.CompositingQuality = CompositingQuality.HighQuality;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.PageScale = 0.5f;
g.PageUnit = GraphicsUnit.Inch;
g.PixelOffsetMode = PixelOffsetMode.Half;
g.RenderingOrigin = new Point(-1, -1);
g.RotateTransform(45);
g.SmoothingMode = SmoothingMode.AntiAlias;
g.TextContrast = 0;
g.TextRenderingHint = TextRenderingHint.AntiAlias;
CheckCustomProperties("modified", g);
CheckMatrix("modified.Transform", g.Transform, 0.707f, 0.707f, -0.707f, 0.707f, 0, 0);
GraphicsContainer gc = g.BeginContainer(new RectangleF(40, 30, 20, 10), new RectangleF(10, 20, 30, 40), GraphicsUnit.Inch);
// things gets reseted after calling BeginContainer
CheckDefaultProperties("BeginContainer", g);
// but not everything
Assert.Equal(new Point(-1, -1), g.RenderingOrigin);
g.EndContainer(gc);
CheckCustomProperties("EndContainer", g);
}
private void BeginContainer_GraphicsUnit(GraphicsUnit unit)
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
g.BeginContainer(new RectangleF(40, 30, 20, 10), new RectangleF(10, 20, 30, 40), unit);
}
[Fact]
public void BeginContainer_GraphicsUnit_Display()
{
Assert.Throws<ArgumentException>(() => BeginContainer_GraphicsUnit(GraphicsUnit.Display));
}
[Fact]
public void BeginContainer_GraphicsUnit_Valid()
{
BeginContainer_GraphicsUnit(GraphicsUnit.Document);
BeginContainer_GraphicsUnit(GraphicsUnit.Inch);
BeginContainer_GraphicsUnit(GraphicsUnit.Millimeter);
BeginContainer_GraphicsUnit(GraphicsUnit.Pixel);
BeginContainer_GraphicsUnit(GraphicsUnit.Point);
}
[Fact]
public void BeginContainer_GraphicsUnit_World()
{
Assert.Throws<ArgumentException>(() => BeginContainer_GraphicsUnit(GraphicsUnit.World));
}
[Fact]
public void BeginContainer_GraphicsUnit_Bad()
{
Assert.Throws<ArgumentException>(() => BeginContainer_GraphicsUnit((GraphicsUnit)int.MinValue));
}
[Fact]
public void EndContainer_Null()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
Assert.Throws<ArgumentNullException>(() => g.EndContainer(null));
}
[Fact]
public void Save()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
CheckDefaultProperties("default", g);
Assert.Equal(new Point(0, 0), g.RenderingOrigin);
GraphicsState gs1 = g.Save();
// nothing is changed after a save
CheckDefaultProperties("save1", g);
Assert.Equal(new Point(0, 0), g.RenderingOrigin);
g.Clip = new Region(new Rectangle(10, 10, 10, 10));
g.CompositingMode = CompositingMode.SourceCopy;
g.CompositingQuality = CompositingQuality.HighQuality;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.PageScale = 0.5f;
g.PageUnit = GraphicsUnit.Inch;
g.PixelOffsetMode = PixelOffsetMode.Half;
g.RenderingOrigin = new Point(-1, -1);
g.RotateTransform(45);
g.SmoothingMode = SmoothingMode.AntiAlias;
g.TextContrast = 0;
g.TextRenderingHint = TextRenderingHint.AntiAlias;
CheckCustomProperties("modified", g);
CheckMatrix("modified.Transform", g.Transform, 0.707f, 0.707f, -0.707f, 0.707f, 0, 0);
GraphicsState gs2 = g.Save();
CheckCustomProperties("save2", g);
g.Restore(gs2);
CheckCustomProperties("restored1", g);
CheckMatrix("restored1.Transform", g.Transform, 0.707f, 0.707f, -0.707f, 0.707f, 0, 0);
g.Restore(gs1);
CheckDefaultProperties("restored2", g);
Assert.Equal(new Point(0, 0), g.RenderingOrigin);
}
[Fact]
public void Restore_Null()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
Assert.Throws<NullReferenceException>(() => g.Restore(null));
}
[Fact]
public void FillRectangles_BrushNull_Rectangle()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
Assert.Throws<ArgumentNullException>(() => g.FillRectangles(null, new Rectangle[1]));
}
[Fact]
public void FillRectangles_Rectangle_Null()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
Assert.Throws<ArgumentNullException>(() => g.FillRectangles(Brushes.Red, (Rectangle[])null));
}
[Fact]
public void FillRectanglesZeroRectangle()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
Assert.Throws<ArgumentException>(() => g.FillRectangles(Brushes.Red, new Rectangle[0]));
}
[Fact]
public void FillRectangles_BrushNull_RectangleF()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
Assert.Throws<ArgumentNullException>(() => g.FillRectangles(null, new RectangleF[1]));
}
[Fact]
public void FillRectangles_RectangleF_Null()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
Assert.Throws<ArgumentNullException>(() => g.FillRectangles(Brushes.Red, (RectangleF[])null));
}
[Fact]
public void FillRectanglesZeroRectangleF()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
Assert.Throws<ArgumentException>(() => g.FillRectangles(Brushes.Red, new RectangleF[0]));
}
[Fact]
public void FillRectangles_NormalBehavior()
{
using Bitmap bitmap = new(20, 20);
using (Graphics g = Graphics.FromImage(bitmap))
{
g.Clear(Color.Fuchsia);
Rectangle rect = new(5, 5, 10, 10);
g.Clip = new Region(rect);
g.FillRectangle(Brushes.Red, rect);
}
Assert.Equal(Color.Red.ToArgb(), bitmap.GetPixel(5, 5).ToArgb());
Assert.Equal(Color.Red.ToArgb(), bitmap.GetPixel(14, 5).ToArgb());
Assert.Equal(Color.Red.ToArgb(), bitmap.GetPixel(5, 14).ToArgb());
Assert.Equal(Color.Red.ToArgb(), bitmap.GetPixel(14, 14).ToArgb());
Assert.Equal(Color.Fuchsia.ToArgb(), bitmap.GetPixel(15, 5).ToArgb());
Assert.Equal(Color.Fuchsia.ToArgb(), bitmap.GetPixel(5, 15).ToArgb());
Assert.Equal(Color.Fuchsia.ToArgb(), bitmap.GetPixel(15, 15).ToArgb());
}
private Bitmap FillDrawRectangle(float width)
{
Bitmap bitmap = new(20, 20);
using (Graphics g = Graphics.FromImage(bitmap))
{
g.Clear(Color.Red);
Rectangle rect = new(5, 5, 10, 10);
g.FillRectangle(Brushes.Green, rect);
if (width >= 0)
{
using Pen pen = new(Color.Blue, width);
g.DrawRectangle(pen, rect);
}
else
{
g.DrawRectangle(Pens.Blue, rect);
}
}
return bitmap;
}
[Fact]
public void FillDrawRectangle_Width_Default()
{
// default pen size
using Bitmap bitmap = FillDrawRectangle(float.MinValue);
// NW
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(4, 4).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(5, 5).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(6, 6).ToArgb());
// N
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(9, 4).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(9, 5).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(9, 6).ToArgb());
// NE
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(16, 4).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 5).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(14, 6).ToArgb());
// E
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(16, 9).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 9).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(14, 9).ToArgb());
// SE
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(16, 16).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 15).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(14, 14).ToArgb());
// S
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(9, 16).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(9, 15).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(9, 14).ToArgb());
// SW
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(4, 16).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(5, 15).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(6, 14).ToArgb());
// W
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(4, 9).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(5, 9).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(6, 9).ToArgb());
}
[Fact]
public void FillDrawRectangle_Width_2()
{
// even pen size
using Bitmap bitmap = FillDrawRectangle(2.0f);
// NW
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(3, 3).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(4, 4).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(5, 5).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(6, 6).ToArgb());
// N
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(9, 3).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(9, 4).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(9, 5).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(9, 6).ToArgb());
// NE
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(16, 3).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 4).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(14, 5).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(13, 6).ToArgb());
// E
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(16, 9).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 9).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(14, 9).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(13, 9).ToArgb());
// SE
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(16, 16).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 15).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(14, 14).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(13, 13).ToArgb());
// S
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(9, 16).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(9, 15).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(9, 14).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(9, 13).ToArgb());
// SW
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(3, 16).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(4, 15).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(5, 14).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(6, 13).ToArgb());
// W
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(3, 9).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(4, 9).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(5, 9).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(6, 9).ToArgb());
}
[Fact]
public void FillDrawRectangle_Width_3()
{
// odd pen size
using Bitmap bitmap = FillDrawRectangle(3.0f);
// NW
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(3, 3).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(4, 4).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(5, 5).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(6, 6).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(7, 7).ToArgb());
// N
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(9, 3).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(9, 4).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(9, 5).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(9, 6).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(9, 7).ToArgb());
// NE
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(17, 3).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(16, 4).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 5).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(14, 6).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(13, 7).ToArgb());
// E
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(17, 9).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(16, 9).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 9).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(14, 9).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(13, 9).ToArgb());
// SE
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(17, 17).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(16, 16).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 15).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(14, 14).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(13, 13).ToArgb());
// S
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(9, 17).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(9, 16).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(9, 15).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(9, 14).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(9, 13).ToArgb());
// SW
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(3, 17).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(4, 16).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(5, 15).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(6, 14).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(7, 13).ToArgb());
// W
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(3, 9).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(4, 9).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(5, 9).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(6, 9).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(7, 9).ToArgb());
}
// reverse, draw the fill over
private Bitmap DrawFillRectangle(float width)
{
Bitmap bitmap = new(20, 20);
using (Graphics g = Graphics.FromImage(bitmap))
{
g.Clear(Color.Red);
Rectangle rect = new(5, 5, 10, 10);
if (width >= 0)
{
using Pen pen = new(Color.Blue, width);
g.DrawRectangle(pen, rect);
}
else
{
g.DrawRectangle(Pens.Blue, rect);
}
g.FillRectangle(Brushes.Green, rect);
}
return bitmap;
}
[Fact]
public void DrawFillRectangle_Width_Default()
{
// default pen size
using Bitmap bitmap = DrawFillRectangle(float.MinValue);
// NW - no blue border
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(4, 4).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(5, 5).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(6, 6).ToArgb());
// N - no blue border
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(9, 4).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(9, 5).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(9, 6).ToArgb());
// NE
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(16, 4).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 5).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(14, 6).ToArgb());
// E
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(16, 9).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 9).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(14, 9).ToArgb());
// SE
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(16, 16).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 15).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(14, 14).ToArgb());
// S
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(9, 16).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(9, 15).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(9, 14).ToArgb());
// SW
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(4, 16).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(5, 15).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(6, 14).ToArgb());
// W - no blue border
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(4, 9).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(5, 9).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(6, 9).ToArgb());
}
[Fact]
public void DrawFillRectangle_Width_2()
{
// even pen size
using Bitmap bitmap = DrawFillRectangle(2.0f);
// looks like a one pixel border - but enlarged
// NW
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(3, 3).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(4, 4).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(5, 5).ToArgb());
// N
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(9, 3).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(9, 4).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(9, 5).ToArgb());
// NE
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(16, 3).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 4).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(14, 5).ToArgb());
// E
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(16, 9).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 9).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(14, 9).ToArgb());
// SE
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(16, 16).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 15).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(14, 14).ToArgb());
// S
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(9, 16).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(9, 15).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(9, 14).ToArgb());
// SW
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(3, 16).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(4, 15).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(5, 14).ToArgb());
// W
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(3, 9).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(4, 9).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(5, 9).ToArgb());
}
[Fact]
public void DrawFillRectangle_Width_3()
{
// odd pen size
using Bitmap bitmap = DrawFillRectangle(3.0f);
// NW
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(3, 3).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(4, 4).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(5, 5).ToArgb());
// N
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(9, 3).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(9, 4).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(9, 5).ToArgb());
// NE
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(17, 3).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(16, 4).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 4).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(14, 5).ToArgb());
// E
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(17, 9).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(16, 9).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 9).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(14, 9).ToArgb());
// SE
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(17, 17).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(16, 16).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 15).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(14, 14).ToArgb());
// S
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(9, 17).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(9, 16).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(9, 15).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(9, 14).ToArgb());
// SW
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(3, 17).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(4, 16).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(5, 15).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(6, 14).ToArgb());
// W
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(3, 9).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(4, 9).ToArgb());
Assert.Equal(0xFF008000, (uint)bitmap.GetPixel(5, 9).ToArgb());
}
private Bitmap DrawLines(float width)
{
Bitmap bitmap = new(20, 20);
using (Graphics g = Graphics.FromImage(bitmap))
{
g.Clear(Color.Red);
Point[] pts = [new(5, 5), new(15, 5), new(15, 15)];
if (width >= 0)
{
using Pen pen = new(Color.Blue, width);
g.DrawLines(pen, pts);
}
else
{
g.DrawLines(Pens.Blue, pts);
}
}
return bitmap;
}
[Fact]
public void DrawLines_Width_Default()
{
// default pen size
using Bitmap bitmap = DrawLines(float.MinValue);
// start
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(4, 4).ToArgb());
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(4, 5).ToArgb());
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(4, 6).ToArgb());
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(5, 4).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(5, 5).ToArgb());
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(5, 6).ToArgb());
// middle
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(14, 4).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(14, 5).ToArgb());
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(14, 6).ToArgb());
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(15, 4).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 5).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 6).ToArgb());
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(16, 4).ToArgb());
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(16, 5).ToArgb());
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(16, 6).ToArgb());
// end
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(14, 15).ToArgb());
Assert.Equal(0xFF0000FF, (uint)bitmap.GetPixel(15, 15).ToArgb());
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(16, 15).ToArgb());
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(14, 16).ToArgb());
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(15, 16).ToArgb());
Assert.Equal(0xFFFF0000, (uint)bitmap.GetPixel(16, 16).ToArgb());
}
[Fact]
public void MeasureString_StringFont()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
SizeF size = g.MeasureString(null, _font);
Assert.True(size.IsEmpty);
size = g.MeasureString(string.Empty, _font);
Assert.True(size.IsEmpty);
g.MeasureString(string.Empty.AsSpan(), _font);
Assert.True(size.IsEmpty);
// null font
size = g.MeasureString(null, null);
Assert.True(size.IsEmpty);
size = g.MeasureString(string.Empty, null);
Assert.True(size.IsEmpty);
g.MeasureString(string.Empty.AsSpan(), null);
Assert.True(size.IsEmpty);
}
[Fact]
public void MeasureString_StringFont_Null()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
Assert.Throws<ArgumentNullException>(() => g.MeasureString("a", null));
Assert.Throws<ArgumentNullException>(() => g.MeasureString("a".AsSpan(), null));
}
[Fact]
public void MeasureString_StringFontSizeF()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
SizeF size = g.MeasureString("a", _font, SizeF.Empty);
Assert.False(size.IsEmpty);
size = g.MeasureString("a".AsSpan(), _font, SizeF.Empty);
Assert.False(size.IsEmpty);
size = g.MeasureString(string.Empty, _font, SizeF.Empty);
Assert.True(size.IsEmpty);
size = g.MeasureString(string.Empty.AsSpan(), _font, SizeF.Empty);
Assert.True(size.IsEmpty);
}
private void MeasureString_StringFontInt(string s, bool useSpan)
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
SizeF size0 = useSpan ? g.MeasureString(s.AsSpan(), _font, 0) : g.MeasureString(s, _font, 0);
SizeF sizeN = useSpan ? g.MeasureString(s.AsSpan(), _font, int.MinValue) : g.MeasureString(s, _font, int.MinValue);
SizeF sizeP = useSpan ? g.MeasureString(s.AsSpan(), _font, int.MaxValue) : g.MeasureString(s, _font, int.MaxValue);
Assert.Equal(size0, sizeN);
Assert.Equal(size0, sizeP);
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public void MeasureString_StringFontInt_ShortString(bool useSpan)
{
MeasureString_StringFontInt("a", useSpan);
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public void MeasureString_StringFontInt_LongString(bool useSpan)
{
MeasureString_StringFontInt("A very long string...", useSpan);
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public void MeasureString_StringFormat_Alignment(bool useSpan)
{
string text = "Hello Mono::";
using StringFormat string_format = new();
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
string_format.Alignment = StringAlignment.Near;
SizeF near = useSpan
? g.MeasureString(text.AsSpan(), _font, int.MaxValue, string_format)
: g.MeasureString(text, _font, int.MaxValue, string_format);
string_format.Alignment = StringAlignment.Center;
SizeF center = useSpan
? g.MeasureString(text.AsSpan(), _font, int.MaxValue, string_format)
: g.MeasureString(text, _font, int.MaxValue, string_format);
string_format.Alignment = StringAlignment.Far;
SizeF far = useSpan
? g.MeasureString(text.AsSpan(), _font, int.MaxValue, string_format)
: g.MeasureString(text, _font, int.MaxValue, string_format);
Assert.Equal((double)near.Width, center.Width, 1);
Assert.Equal((double)near.Height, center.Height, 1);
Assert.Equal((double)center.Width, far.Width, 1);
Assert.Equal((double)center.Height, far.Height, 1);
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public void MeasureString_StringFormat_Alignment_DirectionVertical(bool useSpan)
{
string text = "Hello Mono::";
using StringFormat string_format = new();
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
string_format.FormatFlags = StringFormatFlags.DirectionVertical;
string_format.Alignment = StringAlignment.Near;
SizeF near = useSpan
? g.MeasureString(text.AsSpan(), _font, int.MaxValue, string_format)
: g.MeasureString(text, _font, int.MaxValue, string_format);
string_format.Alignment = StringAlignment.Center;
SizeF center = useSpan
? g.MeasureString(text.AsSpan(), _font, int.MaxValue, string_format)
: g.MeasureString(text, _font, int.MaxValue, string_format);
string_format.Alignment = StringAlignment.Far;
SizeF far = useSpan
? g.MeasureString(text.AsSpan(), _font, int.MaxValue, string_format)
: g.MeasureString(text, _font, int.MaxValue, string_format);
Assert.Equal((double)near.Width, center.Width, 0);
Assert.Equal((double)near.Height, center.Height, 0);
Assert.Equal((double)center.Width, far.Width, 0);
Assert.Equal((double)center.Height, far.Height, 0);
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public void MeasureString_StringFormat_LineAlignment(bool useSpan)
{
string text = "Hello Mono::";
using StringFormat string_format = new();
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
string_format.LineAlignment = StringAlignment.Near;
SizeF near = useSpan
? g.MeasureString(text.AsSpan(), _font, int.MaxValue, string_format)
: g.MeasureString(text, _font, int.MaxValue, string_format);
string_format.LineAlignment = StringAlignment.Center;
SizeF center = useSpan
? g.MeasureString(text.AsSpan(), _font, int.MaxValue, string_format)
: g.MeasureString(text, _font, int.MaxValue, string_format);
string_format.LineAlignment = StringAlignment.Far;
SizeF far = useSpan
? g.MeasureString(text.AsSpan(), _font, int.MaxValue, string_format)
: g.MeasureString(text, _font, int.MaxValue, string_format);
Assert.Equal((double)near.Width, center.Width, 1);
Assert.Equal((double)near.Height, center.Height, 1);
Assert.Equal((double)center.Width, far.Width, 1);
Assert.Equal((double)center.Height, far.Height, 1);
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public void MeasureString_StringFormat_LineAlignment_DirectionVertical(bool useSpan)
{
string text = "Hello Mono::";
using StringFormat string_format = new();
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
string_format.FormatFlags = StringFormatFlags.DirectionVertical;
string_format.LineAlignment = StringAlignment.Near;
SizeF near = useSpan
? g.MeasureString(text.AsSpan(), _font, int.MaxValue, string_format)
: g.MeasureString(text, _font, int.MaxValue, string_format);
string_format.LineAlignment = StringAlignment.Center;
SizeF center = useSpan
? g.MeasureString(text.AsSpan(), _font, int.MaxValue, string_format)
: g.MeasureString(text, _font, int.MaxValue, string_format);
string_format.LineAlignment = StringAlignment.Far;
SizeF far = useSpan
? g.MeasureString(text.AsSpan(), _font, int.MaxValue, string_format)
: g.MeasureString(text, _font, int.MaxValue, string_format);
Assert.Equal((double)near.Width, center.Width, 1);
Assert.Equal((double)near.Height, center.Height, 1);
Assert.Equal((double)center.Width, far.Width, 1);
Assert.Equal((double)center.Height, far.Height, 1);
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public void MeasureString_CharactersFitted(bool useSpan)
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
string s = "aaa aa aaaa a aaa";
SizeF size = useSpan ? g.MeasureString(s.AsSpan(), _font) : g.MeasureString(s, _font);
int chars, lines;
SizeF size2 = useSpan
? g.MeasureString(s.AsSpan(), _font, new SizeF(80, size.Height), null, out chars, out lines)
: g.MeasureString(s, _font, new SizeF(80, size.Height), null, out chars, out lines);
// in pixels
Assert.True(size2.Width < size.Width);
Assert.Equal((double)size2.Height, size.Height);
Assert.Equal(1, lines);
// documentation seems to suggest chars is total length
Assert.True(chars < s.Length);
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public void MeasureString_Whitespace(bool useSpan)
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
string s = string.Empty;
SizeF size = useSpan ? g.MeasureString(s.AsSpan(), _font) : g.MeasureString(s, _font);
Assert.Equal(0, size.Height);
Assert.Equal(0, size.Width);
s += " ";
SizeF expected = useSpan ? g.MeasureString(s.AsSpan(), _font) : g.MeasureString(s, _font);
for (int i = 1; i < 10; i++)
{
s += " ";
size = useSpan ? g.MeasureString(s.AsSpan(), _font) : g.MeasureString(s, _font);
Assert.Equal((double)expected.Height, size.Height, 1);
Assert.Equal((double)expected.Width, size.Width, 1);
}
s = "a";
expected = useSpan ? g.MeasureString(s.AsSpan(), _font) : g.MeasureString(s, _font);
s = " " + s;
size = useSpan ? g.MeasureString(s.AsSpan(), _font) : g.MeasureString(s, _font);
float space_width = size.Width - expected.Width;
for (int i = 1; i < 10; i++)
{
size = useSpan ? g.MeasureString(s.AsSpan(), _font) : g.MeasureString(s, _font);
Assert.Equal((double)expected.Height, size.Height, 1);
Assert.Equal((double)expected.Width + i * space_width, size.Width, 1);
s = " " + s;
}
s = "a";
expected = useSpan ? g.MeasureString(s.AsSpan(), _font) : g.MeasureString(s, _font);
for (int i = 1; i < 10; i++)
{
s += " ";
size = useSpan ? g.MeasureString(s.AsSpan(), _font) : g.MeasureString(s, _font);
Assert.Equal((double)expected.Height, size.Height, 1);
Assert.Equal((double)expected.Width, size.Width, 1);
}
}
[Fact]
public void MeasureCharacterRanges_NullOrEmptyText()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
Region[] regions = g.MeasureCharacterRanges(null, _font, new RectangleF(), null);
Assert.Equal(0, regions.Length);
regions = g.MeasureCharacterRanges(string.Empty, _font, new RectangleF(), null);
Assert.Equal(0, regions.Length);
regions = g.MeasureCharacterRanges(string.Empty.AsSpan(), _font, new RectangleF(), null);
Assert.Equal(0, regions.Length);
// null font is ok with null or empty string
regions = g.MeasureCharacterRanges(null, null, new RectangleF(), null);
Assert.Equal(0, regions.Length);
regions = g.MeasureCharacterRanges(string.Empty, null, new RectangleF(), null);
Assert.Equal(0, regions.Length);
regions = g.MeasureCharacterRanges(string.Empty.AsSpan(), null, new RectangleF(), null);
Assert.Equal(0, regions.Length);
}
[Fact]
public void MeasureCharacterRanges_EmptyStringFormat()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
// string format without character ranges
Region[] regions = g.MeasureCharacterRanges("Mono", _font, new RectangleF(), new StringFormat());
Assert.Equal(0, regions.Length);
g.MeasureCharacterRanges("Mono".AsSpan(), _font, new RectangleF(), new StringFormat());
Assert.Equal(0, regions.Length);
}
[Fact]
public void MeasureCharacterRanges_FontNull()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
Assert.Throws<ArgumentNullException>(() => g.MeasureCharacterRanges("a", null, new RectangleF(), null));
Assert.Throws<ArgumentNullException>(() => g.MeasureCharacterRanges("a".AsSpan(), null, new RectangleF(), null));
}
[Fact]
public void MeasureCharacterRanges_TwoLines()
{
string text = "this\nis a test";
CharacterRange[] ranges = [new CharacterRange(0, 5), new CharacterRange(5, 9)];
using StringFormat string_format = new();
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
string_format.FormatFlags = StringFormatFlags.NoClip;
string_format.SetMeasurableCharacterRanges(ranges);
SizeF size = g.MeasureString(text, _font, new Point(0, 0), string_format);
RectangleF layout_rect = new(0.0f, 0.0f, size.Width, size.Height);
Region[] regions = g.MeasureCharacterRanges(text, _font, layout_rect, string_format);
Assert.Equal(2, regions.Length);
Assert.Equal(regions[0].GetBounds(g).Height, regions[1].GetBounds(g).Height);
regions = g.MeasureCharacterRanges(text.AsSpan(), _font, layout_rect, string_format);
Assert.Equal(2, regions.Length);
Assert.Equal(regions[0].GetBounds(g).Height, regions[1].GetBounds(g).Height);
}
private void MeasureCharacterRanges(string text, int first, int length, bool useSpan)
{
CharacterRange[] ranges = [new CharacterRange(first, length)];
using StringFormat string_format = new();
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
string_format.FormatFlags = StringFormatFlags.NoClip;
string_format.SetMeasurableCharacterRanges(ranges);
SizeF size = useSpan
? g.MeasureString(text.AsSpan(), _font, new Point(0, 0), string_format)
: g.MeasureString(text, _font, new Point(0, 0), string_format);
RectangleF layout_rect = new(0.0f, 0.0f, size.Width, size.Height);
if (useSpan)
{
g.MeasureCharacterRanges(text.AsSpan(), _font, layout_rect, string_format);
}
else
{
g.MeasureCharacterRanges(text, _font, layout_rect, string_format);
}
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public void MeasureCharacterRanges_FirstTooFar(bool useSpan)
{
string text = "this\nis a test";
Assert.Throws<ArgumentException>(() => MeasureCharacterRanges(text, text.Length, 1, useSpan));
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public void MeasureCharacterRanges_LengthTooLong(bool useSpan)
{
string text = "this\nis a test";
Assert.Throws<ArgumentException>(() => MeasureCharacterRanges(text, 0, text.Length + 1, useSpan));
}
[Fact]
public void MeasureCharacterRanges_Prefix()
{
string text = "Hello &Mono::";
CharacterRange[] ranges = [new CharacterRange(5, 4)];
using StringFormat string_format = new();
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
string_format.SetMeasurableCharacterRanges(ranges);
SizeF size = g.MeasureString(text, _font, new Point(0, 0), string_format);
RectangleF layout_rect = new(0.0f, 0.0f, size.Width, size.Height);
// here & is part of the measure and visible
string_format.HotkeyPrefix = HotkeyPrefix.None;
Region[] regions = g.MeasureCharacterRanges(text, _font, layout_rect, string_format);
RectangleF bounds_none = regions[0].GetBounds(g);
// here & is part of the measure (range) but visible as an underline
string_format.HotkeyPrefix = HotkeyPrefix.Show;
regions = g.MeasureCharacterRanges(text, _font, layout_rect, string_format);
RectangleF bounds_show = regions[0].GetBounds(g);
Assert.True(bounds_show.Width < bounds_none.Width);
regions = g.MeasureCharacterRanges(text.AsSpan(), _font, layout_rect, string_format);
bounds_show = regions[0].GetBounds(g);
Assert.True(bounds_show.Width < bounds_none.Width);
// here & is part of the measure (range) but invisible
string_format.HotkeyPrefix = HotkeyPrefix.Hide;
regions = g.MeasureCharacterRanges(text, _font, layout_rect, string_format);
RectangleF bounds_hide = regions[0].GetBounds(g);
Assert.Equal((double)bounds_hide.Width, bounds_show.Width);
g.MeasureCharacterRanges(text.AsSpan(), _font, layout_rect, string_format);
bounds_hide = regions[0].GetBounds(g);
Assert.Equal((double)bounds_hide.Width, bounds_show.Width);
}
[Fact]
public void MeasureCharacterRanges_NullStringFormat()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
Assert.Throws<ArgumentException>(() => g.MeasureCharacterRanges("Mono", _font, new RectangleF(), null));
Assert.Throws<ArgumentException>(() => g.MeasureCharacterRanges("Mono".AsSpan(), _font, new RectangleF(), null));
}
private static readonly CharacterRange[] s_ranges = [new(0, 1), new(1, 1), new(2, 1)];
private Region[] Measure_Helper(Graphics gfx, RectangleF rect, bool useSpan)
{
using StringFormat format = StringFormat.GenericTypographic;
format.SetMeasurableCharacterRanges(s_ranges);
using Font font = new(FontFamily.GenericSerif, 11.0f);
return useSpan
? gfx.MeasureCharacterRanges("abc".AsSpan(), font, rect, format)
: gfx.MeasureCharacterRanges("abc", font, rect, format);
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public void Measure(bool useSpan)
{
using Graphics gfx = Graphics.FromImage(new Bitmap(1, 1));
Region[] zero = Measure_Helper(gfx, new RectangleF(0, 0, 0, 0), useSpan);
Assert.Equal(3, zero.Length);
Region[] small = Measure_Helper(gfx, new RectangleF(0, 0, 100, 100), useSpan);
Assert.Equal(3, small.Length);
for (int i = 0; i < 3; i++)
{
RectangleF zb = zero[i].GetBounds(gfx);
RectangleF sb = small[i].GetBounds(gfx);
Assert.Equal(sb.X, zb.X);
Assert.Equal(sb.Y, zb.Y);
Assert.Equal((double)sb.Width, zb.Width);
Assert.Equal((double)sb.Height, zb.Height);
}
Region[] max = Measure_Helper(gfx, new RectangleF(0, 0, float.MaxValue, float.MaxValue), useSpan);
Assert.Equal(3, max.Length);
for (int i = 0; i < 3; i++)
{
RectangleF zb = zero[i].GetBounds(gfx);
RectangleF mb = max[i].GetBounds(gfx);
Assert.Equal(mb.X, zb.X);
Assert.Equal(mb.Y, zb.Y);
Assert.Equal((double)mb.Width, zb.Width);
Assert.Equal((double)mb.Height, zb.Height);
}
}
[Theory]
[InlineData(true)]
[InlineData(false)]
public void MeasureLimits(bool useSpan)
{
using Graphics gfx = Graphics.FromImage(new Bitmap(1, 1));
Region[] min = Measure_Helper(gfx, new RectangleF(0, 0, float.MinValue, float.MinValue), useSpan);
Assert.Equal(3, min.Length);
for (int i = 0; i < 3; i++)
{
RectangleF mb = min[i].GetBounds(gfx);
Assert.Equal(-4194304.0f, mb.X);
Assert.Equal(-4194304.0f, mb.Y);
Assert.Equal(8388608.0f, mb.Width);
Assert.Equal(8388608.0f, mb.Height);
}
Region[] neg = Measure_Helper(gfx, new RectangleF(0, 0, -20, -20), useSpan);
Assert.Equal(3, neg.Length);
for (int i = 0; i < 3; i++)
{
RectangleF mb = neg[i].GetBounds(gfx);
Assert.Equal(-4194304.0f, mb.X);
Assert.Equal(-4194304.0f, mb.Y);
Assert.Equal(8388608.0f, mb.Width);
Assert.Equal(8388608.0f, mb.Height);
}
}
[Fact]
public void DrawString_EndlessLoop()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
using StringFormat fmt = new();
Rectangle rect = Rectangle.Empty;
rect.Location = new Point(10, 10);
rect.Size = new Size(1, 20);
fmt.Alignment = StringAlignment.Center;
fmt.LineAlignment = StringAlignment.Center;
fmt.FormatFlags = StringFormatFlags.NoWrap;
fmt.Trimming = StringTrimming.EllipsisWord;
g.DrawString("Test String", _font, Brushes.Black, rect, fmt);
g.DrawString("Test String".AsSpan(), _font, Brushes.Black, rect, fmt);
}
[Fact]
public void DrawString_EndlessLoop_Wrapping()
{
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
using StringFormat fmt = new();
Rectangle rect = Rectangle.Empty;
rect.Location = new Point(10, 10);
rect.Size = new Size(1, 20);
fmt.Alignment = StringAlignment.Center;
fmt.LineAlignment = StringAlignment.Center;
fmt.Trimming = StringTrimming.EllipsisWord;
g.DrawString("Test String", _font, Brushes.Black, rect, fmt);
g.DrawString("Test String".AsSpan(), _font, Brushes.Black, rect, fmt);
}
[Fact]
public void MeasureString_Wrapping_Dots()
{
string text = "this is really long text........................................... with a lot o periods.";
using Bitmap bitmap = new(20, 20);
using Graphics g = Graphics.FromImage(bitmap);
using StringFormat format = new();
format.Alignment = StringAlignment.Center;
SizeF sz = g.MeasureString(text, _font, 80, format);
Assert.True(sz.Width <= 80);
Assert.True(sz.Height > _font.Height * 2);
sz = g.MeasureString(text.AsSpan(), _font, 80, format);
Assert.True(sz.Width <= 80);
Assert.True(sz.Height > _font.Height * 2);
}
[Fact]
public void GetReleaseHdcInternal()
{
using Bitmap b = new(10, 10);
using Graphics g = Graphics.FromImage(b);
IntPtr hdc1 = g.GetHdc();
g.ReleaseHdcInternal(hdc1);
IntPtr hdc2 = g.GetHdc();
g.ReleaseHdcInternal(hdc2);
Assert.Equal(hdc1, hdc2);
}
[Fact]
public void ReleaseHdcInternal_IntPtrZero()
{
using Bitmap b = new(10, 10);
using Graphics g = Graphics.FromImage(b);
Assert.Throws<ArgumentException>(() => g.ReleaseHdcInternal(IntPtr.Zero));
}
[Fact]
public void ReleaseHdcInternal_TwoTimes()
{
using Bitmap b = new(10, 10);
using Graphics g = Graphics.FromImage(b);
IntPtr hdc = g.GetHdc();
g.ReleaseHdcInternal(hdc);
Assert.Throws<ArgumentException>(() => g.ReleaseHdcInternal(hdc));
}
[Fact]
public void TestReleaseHdc()
{
using Bitmap b = new(10, 10);
using Graphics g = Graphics.FromImage(b);
IntPtr hdc1 = g.GetHdc();
g.ReleaseHdc();
IntPtr hdc2 = g.GetHdc();
g.ReleaseHdc();
Assert.Equal(hdc1, hdc2);
}
[Fact]
public void TestReleaseHdcException()
{
using Bitmap b = new(10, 10);
using Graphics g = Graphics.FromImage(b);
Assert.Throws<ArgumentException>(() => g.ReleaseHdc());
}
[Fact]
public void TestReleaseHdcException2()
{
using Bitmap b = new(10, 10);
using Graphics g = Graphics.FromImage(b);
g.GetHdc();
g.ReleaseHdc();
Assert.Throws<ArgumentException>(() => g.ReleaseHdc());
}
[ConditionalFact]
public void VisibleClipBound()
{
if (PlatformDetection.IsArmOrArm64Process)
{
// [ActiveIssue("https://github.com/dotnet/winforms/issues/8817")]
throw new SkipTestException("Precision on float numbers");
}
// see #78958
using Bitmap bmp = new(100, 100);
using Graphics g = Graphics.FromImage(bmp);
RectangleF noclip = g.VisibleClipBounds;
Assert.Equal(0, noclip.X);
Assert.Equal(0, noclip.Y);
Assert.Equal(100, noclip.Width);
Assert.Equal(100, noclip.Height);
// note: libgdiplus regions are precise to multiple of multiple of 8
g.Clip = new Region(new RectangleF(0, 0, 32, 32));
RectangleF clip = g.VisibleClipBounds;
Assert.Equal(0, clip.X);
Assert.Equal(0, clip.Y);
Assert.Equal(32.0, clip.Width, 4);
Assert.Equal(32.0, clip.Height, 4);
g.RotateTransform(90);
RectangleF rotclip = g.VisibleClipBounds;
Assert.Equal(0, rotclip.X);
Assert.Equal(-32.0, rotclip.Y, 4);
Assert.Equal(32.0, rotclip.Width, 4);
Assert.Equal(32.0, rotclip.Height, 4);
}
[ConditionalFact]
public void VisibleClipBound_BigClip()
{
if (PlatformDetection.IsArmOrArm64Process)
{
// ActiveIssue: 35744
throw new SkipTestException("Precision on float numbers");
}
using Bitmap bmp = new(100, 100);
using Graphics g = Graphics.FromImage(bmp);
RectangleF noclip = g.VisibleClipBounds;
Assert.Equal(0, noclip.X);
Assert.Equal(0, noclip.Y);
Assert.Equal(100, noclip.Width);
Assert.Equal(100, noclip.Height);
// clip is larger than bitmap
g.Clip = new Region(new RectangleF(0, 0, 200, 200));
RectangleF clipbound = g.ClipBounds;
Assert.Equal(0, clipbound.X);
Assert.Equal(0, clipbound.Y);
Assert.Equal(200, clipbound.Width);
Assert.Equal(200, clipbound.Height);
RectangleF clip = g.VisibleClipBounds;
Assert.Equal(0, clip.X);
Assert.Equal(0, clip.Y);
Assert.Equal(100, clip.Width);
Assert.Equal(100, clip.Height);
g.RotateTransform(90);
RectangleF rotclipbound = g.ClipBounds;
Assert.Equal(0, rotclipbound.X);
Assert.Equal(-200.0, rotclipbound.Y, 4);
Assert.Equal(200.0, rotclipbound.Width, 4);
Assert.Equal(200.0, rotclipbound.Height, 4);
RectangleF rotclip = g.VisibleClipBounds;
Assert.Equal(0, rotclip.X);
Assert.Equal(-100.0, rotclip.Y, 4);
Assert.Equal(100.0, rotclip.Width, 4);
Assert.Equal(100.0, rotclip.Height, 4);
}
[ConditionalFact]
public void Rotate()
{
if (PlatformDetection.IsArmOrArm64Process)
{
// ActiveIssue: 35744
throw new SkipTestException("Precision on float numbers");
}
using Bitmap bmp = new(100, 50);
using Graphics g = Graphics.FromImage(bmp);
RectangleF vcb = g.VisibleClipBounds;
Assert.Equal(0, vcb.X);
Assert.Equal(0, vcb.Y);
Assert.Equal(100.0, vcb.Width, 4);
Assert.Equal(50.0, vcb.Height, 4);
g.RotateTransform(90);
RectangleF rvcb = g.VisibleClipBounds;
Assert.Equal(0, rvcb.X);
Assert.Equal(-100.0, rvcb.Y, 4);
Assert.Equal(50.0, rvcb.Width, 4);
Assert.Equal(100.0, rvcb.Height, 4);
}
[Fact]
public void Scale()
{
using Bitmap bmp = new(100, 50);
using Graphics g = Graphics.FromImage(bmp);
RectangleF vcb = g.VisibleClipBounds;
Assert.Equal(0, vcb.X);
Assert.Equal(0, vcb.Y);
Assert.Equal(100, vcb.Width);
Assert.Equal(50, vcb.Height);
g.ScaleTransform(2, 0.5f);
RectangleF svcb = g.VisibleClipBounds;
Assert.Equal(0, svcb.X);
Assert.Equal(0, svcb.Y);
Assert.Equal(50, svcb.Width);
Assert.Equal(100, svcb.Height);
}
[Fact]
public void Translate()
{
using Bitmap bmp = new(100, 50);
using Graphics g = Graphics.FromImage(bmp);
RectangleF vcb = g.VisibleClipBounds;
Assert.Equal(0, vcb.X);
Assert.Equal(0, vcb.Y);
Assert.Equal(100, vcb.Width);
Assert.Equal(50, vcb.Height);
g.TranslateTransform(-25, 25);
RectangleF tvcb = g.VisibleClipBounds;
Assert.Equal(25, tvcb.X);
Assert.Equal(-25, tvcb.Y);
Assert.Equal(100, tvcb.Width);
Assert.Equal(50, tvcb.Height);
}
[Fact]
public void DrawIcon_NullRectangle()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawIcon(null, new Rectangle(0, 0, 32, 32)));
}
[Fact]
public void DrawIcon_IconRectangle()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
g.DrawIcon(SystemIcons.Application, new Rectangle(0, 0, 40, 20));
// Rectangle is empty when X, Y, Width and Height == 0
// (yep X and Y too, RectangleF only checks for Width and Height)
g.DrawIcon(SystemIcons.Asterisk, new Rectangle(0, 0, 0, 0));
// so this one is half-empty ;-)
g.DrawIcon(SystemIcons.Error, new Rectangle(20, 40, 0, 0));
// negative width or height isn't empty (for Rectangle)
g.DrawIconUnstretched(SystemIcons.WinLogo, new Rectangle(10, 20, -1, 0));
g.DrawIconUnstretched(SystemIcons.WinLogo, new Rectangle(20, 10, 0, -1));
}
[Fact]
public void DrawIcon_NullIntInt()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawIcon(null, 4, 2));
}
[Fact]
public void DrawIcon_IconIntInt()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
g.DrawIcon(SystemIcons.Exclamation, 4, 2);
g.DrawIcon(SystemIcons.Hand, 0, 0);
}
[Fact]
public void DrawIconUnstretched_NullRectangle()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawIconUnstretched(null, new Rectangle(0, 0, 40, 20)));
}
[Fact]
public void DrawIconUnstretched_IconRectangle()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
g.DrawIconUnstretched(SystemIcons.Information, new Rectangle(0, 0, 40, 20));
// Rectangle is empty when X, Y, Width and Height == 0
// (yep X and Y too, RectangleF only checks for Width and Height)
g.DrawIconUnstretched(SystemIcons.Question, new Rectangle(0, 0, 0, 0));
// so this one is half-empty ;-)
g.DrawIconUnstretched(SystemIcons.Warning, new Rectangle(20, 40, 0, 0));
// negative width or height isn't empty (for Rectangle)
g.DrawIconUnstretched(SystemIcons.WinLogo, new Rectangle(10, 20, -1, 0));
g.DrawIconUnstretched(SystemIcons.WinLogo, new Rectangle(20, 10, 0, -1));
}
[Fact]
public void DrawImage_NullRectangleF()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawImage(null, new RectangleF(0, 0, 0, 0)));
}
[Fact]
public void DrawImage_ImageRectangleF()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
g.DrawImage(bmp, new RectangleF(0, 0, 0, 0));
g.DrawImage(bmp, new RectangleF(20, 40, 0, 0));
g.DrawImage(bmp, new RectangleF(10, 20, -1, 0));
g.DrawImage(bmp, new RectangleF(20, 10, 0, -1));
}
[Fact]
public void DrawImage_NullPointF()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawImage(null, new PointF(0, 0)));
}
[Fact]
public void DrawImage_ImagePointF()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
g.DrawImage(bmp, new PointF(0, 0));
}
[Fact]
public void DrawImage_NullPointFArray()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawImage(null, new PointF[0]));
}
[Fact]
public void DrawImage_ImagePointFArrayNull()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawImage(bmp, (PointF[])null));
}
[Fact]
public void DrawImage_ImagePointFArrayEmpty()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentException>(() => g.DrawImage(bmp, new PointF[0]));
}
[Fact]
public void DrawImage_ImagePointFArray()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
g.DrawImage(bmp, new PointF[]
{
new(0, 0), new(1, 1), new(2, 2)
});
}
[Fact]
public void DrawImage_NullRectangle()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawImage(null, new Rectangle(0, 0, 0, 0)));
}
[Fact]
public void DrawImage_ImageRectangle()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
// Rectangle is empty when X, Y, Width and Height == 0
// (yep X and Y too, RectangleF only checks for Width and Height)
g.DrawImage(bmp, new Rectangle(0, 0, 0, 0));
// so this one is half-empty ;-)
g.DrawImage(bmp, new Rectangle(20, 40, 0, 0));
// negative width or height isn't empty (for Rectangle)
g.DrawImage(bmp, new Rectangle(10, 20, -1, 0));
g.DrawImage(bmp, new Rectangle(20, 10, 0, -1));
}
[Fact]
public void DrawImage_NullPoint()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawImage(null, new Point(0, 0)));
}
[Fact]
public void DrawImage_ImagePoint()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
g.DrawImage(bmp, new Point(0, 0));
}
[Fact]
public void DrawImage_NullPointArray()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawImage(null, new Point[0]));
}
[Fact]
public void DrawImage_ImagePointArrayNull()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawImage(bmp, (Point[])null));
}
[Fact]
public void DrawImage_ImagePointArrayEmpty()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentException>(() => g.DrawImage(bmp, new Point[0]));
}
[Fact]
public void DrawImage_ImagePointArray()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
g.DrawImage(bmp, new Point[]
{
new(0, 0), new(1, 1), new(2, 2)
});
}
[Fact]
public void DrawImage_NullIntInt()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawImage(null, int.MaxValue, int.MinValue));
}
[Fact]
public void DrawImage_ImageIntInt_Overflow()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<OverflowException>(() => g.DrawImage(bmp, int.MaxValue, int.MinValue));
}
[Fact]
public void DrawImage_ImageIntInt()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
g.DrawImage(bmp, -40, -40);
}
[Fact]
public void DrawImage_NullFloat()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawImage(null, float.MaxValue, float.MinValue));
}
[Fact]
public void DrawImage_ImageFloatFloat_Overflow()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<OverflowException>(() => g.DrawImage(bmp, float.MaxValue, float.MinValue));
}
[Fact]
public void DrawImage_ImageFloatFloat()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
g.DrawImage(bmp, -40.0f, -40.0f);
}
[Fact]
public void DrawImage_NullRectangleRectangleGraphicsUnit()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawImage(null, new Rectangle(), new Rectangle(), GraphicsUnit.Display));
}
private void DrawImage_ImageRectangleRectangleGraphicsUnit(GraphicsUnit unit)
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Rectangle r = new(0, 0, 40, 40);
g.DrawImage(bmp, r, r, unit);
}
[Fact]
public void DrawImage_ImageRectangleRectangleGraphicsUnit_Display()
{
Assert.Throws<ArgumentException>(() => DrawImage_ImageRectangleRectangleGraphicsUnit(GraphicsUnit.Display));
}
[Fact]
public void DrawImage_ImageRectangleRectangleGraphicsUnit_Pixel()
{
// this unit works
DrawImage_ImageRectangleRectangleGraphicsUnit(GraphicsUnit.Pixel);
}
[Fact]
public void DrawImage_ImageRectangleRectangleGraphicsUnit_World()
{
Assert.Throws<ArgumentException>(() => DrawImage_ImageRectangleRectangleGraphicsUnit(GraphicsUnit.World));
}
[Fact]
public void DrawImage_NullPointRectangleGraphicsUnit()
{
Rectangle r = new(1, 2, 3, 4);
Point[] pts = [new(1, 1), new(2, 2), new(3, 3)];
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawImage(null, pts, r, GraphicsUnit.Pixel));
}
private void DrawImage_ImagePointRectangleGraphicsUnit(Point[] pts)
{
Rectangle r = new(1, 2, 3, 4);
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
g.DrawImage(bmp, pts, r, GraphicsUnit.Pixel);
}
[Fact]
public void DrawImage_ImageNullRectangleGraphicsUnit()
{
Assert.Throws<ArgumentNullException>(() => DrawImage_ImagePointRectangleGraphicsUnit(null));
}
[Fact]
public void DrawImage_ImagePoint0RectangleGraphicsUnit()
{
Assert.Throws<ArgumentException>(() => DrawImage_ImagePointRectangleGraphicsUnit([]));
}
[Fact]
public void DrawImage_ImagePoint1RectangleGraphicsUnit()
{
Point p = new(1, 1);
Assert.Throws<ArgumentException>(() => DrawImage_ImagePointRectangleGraphicsUnit([p]));
}
[Fact]
public void DrawImage_ImagePoint2RectangleGraphicsUnit()
{
Point p = new(1, 1);
Assert.Throws<ArgumentException>(() => DrawImage_ImagePointRectangleGraphicsUnit([p, p]));
}
[Fact]
public void DrawImage_ImagePoint3RectangleGraphicsUnit()
{
Point p = new(1, 1);
DrawImage_ImagePointRectangleGraphicsUnit([p, p, p]);
}
[Fact]
public void DrawImage_ImagePoint4RectangleGraphicsUnit()
{
Point p = new(1, 1);
Assert.Throws<NotImplementedException>(() => DrawImage_ImagePointRectangleGraphicsUnit([p, p, p, p]));
}
[Fact]
public void DrawImage_NullPointFRectangleGraphicsUnit()
{
Rectangle r = new(1, 2, 3, 4);
PointF[] pts = [new(1, 1), new(2, 2), new(3, 3)];
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawImage(null, pts, r, GraphicsUnit.Pixel));
}
private void DrawImage_ImagePointFRectangleGraphicsUnit(PointF[] pts)
{
Rectangle r = new(1, 2, 3, 4);
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
g.DrawImage(bmp, pts, r, GraphicsUnit.Pixel);
}
[Fact]
public void DrawImage_ImageNullFRectangleGraphicsUnit()
{
Assert.Throws<ArgumentNullException>(() => DrawImage_ImagePointFRectangleGraphicsUnit(null));
}
[Fact]
public void DrawImage_ImagePointF0RectangleGraphicsUnit()
{
Assert.Throws<ArgumentException>(() => DrawImage_ImagePointFRectangleGraphicsUnit([]));
}
[Fact]
public void DrawImage_ImagePointF1RectangleGraphicsUnit()
{
PointF p = new(1, 1);
Assert.Throws<ArgumentException>(() => DrawImage_ImagePointFRectangleGraphicsUnit([p]));
}
[Fact]
public void DrawImage_ImagePointF2RectangleGraphicsUnit()
{
PointF p = new(1, 1);
Assert.Throws<ArgumentException>(() => DrawImage_ImagePointFRectangleGraphicsUnit([p, p]));
}
[Fact]
public void DrawImage_ImagePointF3RectangleGraphicsUnit()
{
PointF p = new(1, 1);
DrawImage_ImagePointFRectangleGraphicsUnit([p, p, p]);
}
[Fact]
public void DrawImage_ImagePointF4RectangleGraphicsUnit()
{
PointF p = new(1, 1);
Assert.Throws<NotImplementedException>(() => DrawImage_ImagePointFRectangleGraphicsUnit([p, p, p, p]));
}
[Fact]
public void DrawImage_ImagePointRectangleGraphicsUnitNull()
{
Point p = new(1, 1);
Point[] pts = [p, p, p];
Rectangle r = new(1, 2, 3, 4);
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
g.DrawImage(bmp, pts, r, GraphicsUnit.Pixel, null);
}
[Fact]
public void DrawImage_ImagePointRectangleGraphicsUnitAttributes()
{
Point p = new(1, 1);
Point[] pts = [p, p, p];
Rectangle r = new(1, 2, 3, 4);
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
using ImageAttributes ia = new();
g.DrawImage(bmp, pts, r, GraphicsUnit.Pixel, ia);
}
[Fact]
public void DrawImageUnscaled_NullPoint()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawImageUnscaled(null, new Point(0, 0)));
}
[Fact]
public void DrawImageUnscaled_ImagePoint()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
g.DrawImageUnscaled(bmp, new Point(0, 0));
}
[Fact]
public void DrawImageUnscaled_NullRectangle()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawImageUnscaled(null, new Rectangle(0, 0, -1, -1)));
}
[Fact]
public void DrawImageUnscaled_ImageRectangle()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
g.DrawImageUnscaled(bmp, new Rectangle(0, 0, -1, -1));
}
[Fact]
public void DrawImageUnscaled_NullIntInt()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawImageUnscaled(null, 0, 0));
}
[Fact]
public void DrawImageUnscaled_ImageIntInt()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
g.DrawImageUnscaled(bmp, 0, 0);
}
[Fact]
public void DrawImageUnscaled_NullIntIntIntInt()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawImageUnscaled(null, 0, 0, -1, -1));
}
[Fact]
public void DrawImageUnscaled_ImageIntIntIntInt()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
g.DrawImageUnscaled(bmp, 0, 0, -1, -1);
}
[Fact]
public void DrawImageUnscaledAndClipped_Null()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawImageUnscaledAndClipped(null, new Rectangle(0, 0, 0, 0)));
}
[Fact]
public void DrawImageUnscaledAndClipped()
{
using Bitmap bmp = new(40, 40);
using Graphics g = Graphics.FromImage(bmp);
// Rectangle is empty when X, Y, Width and Height == 0
// (yep X and Y too, RectangleF only checks for Width and Height)
g.DrawImageUnscaledAndClipped(bmp, new Rectangle(0, 0, 0, 0));
// so this one is half-empty ;-)
g.DrawImageUnscaledAndClipped(bmp, new Rectangle(20, 40, 0, 0));
// negative width or height isn't empty (for Rectangle)
g.DrawImageUnscaledAndClipped(bmp, new Rectangle(10, 20, -1, 0));
g.DrawImageUnscaledAndClipped(bmp, new Rectangle(20, 10, 0, -1));
// smaller
g.DrawImageUnscaledAndClipped(bmp, new Rectangle(0, 0, 10, 20));
g.DrawImageUnscaledAndClipped(bmp, new Rectangle(0, 0, 40, 10));
g.DrawImageUnscaledAndClipped(bmp, new Rectangle(0, 0, 80, 20));
}
[Fact]
public void DrawPath_Pen_Null()
{
using Bitmap bmp = new(20, 20);
using Graphics g = Graphics.FromImage(bmp);
using GraphicsPath path = new();
Assert.Throws<ArgumentNullException>(() => g.DrawPath(null, path));
}
[Fact]
public void DrawPath_Path_Null()
{
using Bitmap bmp = new(20, 20);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.DrawPath(Pens.Black, null));
}
[Fact]
public void DrawPath_Arcs()
{
using Bitmap bmp = new(20, 20);
using Graphics g = Graphics.FromImage(bmp);
using GraphicsPath path = new();
int d = 5;
Rectangle baserect = new(0, 0, 19, 19);
Rectangle arcrect = new(baserect.Location, new Size(d, d));
path.AddArc(arcrect, 180, 90);
arcrect.X = baserect.Right - d;
path.AddArc(arcrect, 270, 90);
arcrect.Y = baserect.Bottom - d;
path.AddArc(arcrect, 0, 90);
arcrect.X = baserect.Left;
path.AddArc(arcrect, 90, 90);
path.CloseFigure();
g.Clear(Color.White);
g.DrawPath(Pens.SteelBlue, path);
Assert.Equal(-12156236, bmp.GetPixel(0, 9).ToArgb());
Assert.Equal(-1, bmp.GetPixel(1, 9).ToArgb());
}
[Fact]
public void FillPath_Brush_Null()
{
using Bitmap bmp = new(20, 20);
using Graphics g = Graphics.FromImage(bmp);
using GraphicsPath path = new();
Assert.Throws<ArgumentNullException>(() => g.FillPath(null, path));
}
[Fact]
public void FillPath_Path_Null()
{
using Bitmap bmp = new(20, 20);
using Graphics g = Graphics.FromImage(bmp);
Assert.Throws<ArgumentNullException>(() => g.FillPath(Brushes.Black, null));
}
[Fact]
public void FillPath_Arcs()
{
using Bitmap bmp = new(20, 20);
using Graphics g = Graphics.FromImage(bmp);
using GraphicsPath path = new();
int d = 5;
Rectangle baserect = new(0, 0, 19, 19);
Rectangle arcrect = new(baserect.Location, new Size(d, d));
path.AddArc(arcrect, 180, 90);
arcrect.X = baserect.Right - d;
path.AddArc(arcrect, 270, 90);
arcrect.Y = baserect.Bottom - d;
path.AddArc(arcrect, 0, 90);
arcrect.X = baserect.Left;
path.AddArc(arcrect, 90, 90);
path.CloseFigure();
g.Clear(Color.White);
g.FillPath(Brushes.SteelBlue, path);
Assert.Equal(-12156236, bmp.GetPixel(0, 9).ToArgb());
Assert.Equal(-12156236, bmp.GetPixel(1, 9).ToArgb());
}
[Fact]
public void TransformPoints()
{
using Bitmap bmp = new(10, 10);
using Graphics g = Graphics.FromImage(bmp);
Point[] pts = new Point[5];
PointF[] ptf = new PointF[5];
for (int i = 0; i < 5; i++)
{
pts[i] = new Point(i, i);
ptf[i] = new PointF(i, i);
}
g.TransformPoints(CoordinateSpace.Page, CoordinateSpace.Device, pts);
g.TransformPoints(CoordinateSpace.Page, CoordinateSpace.Device, ptf);
for (int i = 0; i < 5; i++)
{
Assert.Equal(i, pts[i].X);
Assert.Equal(i, pts[i].Y);
Assert.Equal(i, ptf[i].X);
Assert.Equal(i, ptf[i].Y);
}
}
[Fact]
public void Dpi()
{
float x, y;
using Bitmap bmp = new(10, 10);
using (Graphics g = Graphics.FromImage(bmp))
{
x = g.DpiX - 10;
y = g.DpiY + 10;
}
bmp.SetResolution(x, y);
using (Graphics g = Graphics.FromImage(bmp))
{
Assert.Equal(x, g.DpiX);
Assert.Equal(y, g.DpiY);
}
}
[Fact]
public void GetReleaseHdc()
{
using Bitmap b = new(100, 100);
using Graphics g = Graphics.FromImage(b);
IntPtr hdc1 = g.GetHdc();
g.ReleaseHdc(hdc1);
IntPtr hdc2 = g.GetHdc();
g.ReleaseHdc(hdc2);
Assert.Equal(hdc1, hdc2);
}
}
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