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Rewrite screenshot saving.

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This commit is contained in:
Paul Chote
2019-02-24 12:45:48 +00:00
committed by reaperrr
parent 5f212a99fe
commit 5a1124426d
5 changed files with 46 additions and 47 deletions
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56
OpenRA.Platforms.Default/Sdl2GraphicsContext.cs
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@@ -11,7 +11,11 @@
using System;
using System.Drawing;
using System.IO;
using System.Threading;
using OpenRA.FileFormats;
using OpenRA.Graphics;
using OpenRA.Support;
using SDL2;
namespace OpenRA.Platforms.Default
@@ -111,39 +115,49 @@ namespace OpenRA.Platforms.Default
OpenGL.CheckGLError();
}
public Bitmap TakeScreenshot()
public void SaveScreenshot(string path)
{
var rect = new Rectangle(Point.Empty, window.SurfaceSize);
var bitmap = new Bitmap(rect.Width, rect.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
var data = bitmap.LockBits(rect,
System.Drawing.Imaging.ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
var s = window.SurfaceSize;
var raw = new byte[s.Width * s.Height * 4];
OpenGL.glPushClientAttrib(OpenGL.GL_CLIENT_PIXEL_STORE_BIT);
OpenGL.glPixelStoref(OpenGL.GL_PACK_ROW_LENGTH, data.Stride / 4f);
OpenGL.glPixelStoref(OpenGL.GL_PACK_ROW_LENGTH, s.Width);
OpenGL.glPixelStoref(OpenGL.GL_PACK_ALIGNMENT, 1);
OpenGL.glReadPixels(rect.X, rect.Y, rect.Width, rect.Height, OpenGL.GL_BGRA, OpenGL.GL_UNSIGNED_BYTE, data.Scan0);
OpenGL.glFinish();
OpenGL.glPopClientAttrib();
// Reset alpha channel to fully opaque
unsafe
{
var colors = (int*)data.Scan0;
var stride = data.Stride / 4;
for (var y = 0; y < rect.Height; y++)
for (var x = 0; x < rect.Width; x++)
colors[y * stride + x] |= 0xFF << 24;
fixed (byte* pRaw = raw)
OpenGL.glReadPixels(0, 0, s.Width, s.Height,
OpenGL.GL_BGRA, OpenGL.GL_UNSIGNED_BYTE, (IntPtr)pRaw);
}
bitmap.UnlockBits(data);
OpenGL.glFinish();
OpenGL.glPopClientAttrib();
// OpenGL standard defines the origin in the bottom left corner which is why this is upside-down by default.
bitmap.RotateFlip(RotateFlipType.RotateNoneFlipY);
ThreadPool.QueueUserWorkItem(_ =>
{
// Convert GL pixel data into format expected by png
// - Flip vertically
// - BGRA to RGBA
// - Force A to 255 (no transparent pixels!)
var data = new byte[raw.Length];
for (var y = 0; y < s.Height; y++)
{
for (var x = 0; x < s.Width; x++)
{
var iData = 4 * (y * s.Width + x);
var iRaw = 4 * ((s.Height - y - 1) * s.Width + x);
data[iData] = raw[iRaw + 2];
data[iData + 1] = raw[iRaw + 1];
data[iData + 2] = raw[iRaw + 0];
data[iData + 3] = byte.MaxValue;
}
}
return bitmap;
var screenshot = new Png(data, window.SurfaceSize.Width, window.SurfaceSize.Height);
screenshot.Save(path);
});
}
public void Present()