Fill issue when using ImageBrush

[x3x4x5]

Prerequisites

• [x] I have written a descriptive issue title
• [x] I have verified that I am running the latest version of ImageSharp.Drawing
• [x] I have verified if the problem exist in both DEBUG and RELEASE mode
• [x] I have searched open and closed issues to ensure it has not already been reported

Description

I think there is a problem when using Fill method with ImageBrush. When we use a rectangle for an image, squares are always drawn.

Steps to Reproduce

• Create rectangular image for brush
• Use Fill method with ImageBrush

img.Fill(new ImageBrush(frameImage), new RectangleF(Convert.ToInt32(0), Convert.ToInt32(0), Convert.ToInt32(2000), Convert.ToInt32(2000)));

ImageBrush (frameImage):

Result:

I think the problem is in Apply method of ImageBrush class. I think Height should be used for sourceY calculation and not Width.

System Configuration

• ImageSharp.Drawing version: 1.0.0-beta14
• Other ImageSharp packages and versions: 2.1.1
• Environment (Operating system, version and so on): Windows 10
• .NET Framework version: netcoreapp3.1

[MarkusGrafBuildDesk]

If the ImageBrush is orientated landscape, (e.g. width =125, height =90) you will get the exception _"Specified argument was out of the range of valid values. (Parameter 'DangerousGetRowSpan(99). Y was out of range. Height=90')".

Applying the change suggested above fixes also this issue.

[JimBobSquarePants]

Thanks @x3x4x5 for providing so much information and also the suggested fix!

@MarkusGrafBuildDesk I can confirm that the PR #223 containing the fix works for your provided dimensions in both landscape and portrait. Thanks for the additional information.