From d539f3b80cb6a2a0451149c131afa5e4a38ac3ca Mon Sep 17 00:00:00 2001
From: Sam Hocevar <sam@hocevar.net>
Date: Sun, 8 Apr 2012 13:28:26 +0000
Subject: [PATCH] win32: shuffle bytes in GDI images to match what OpenGL
supports.
---
src/image/codec/gdiplus-image.cpp | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/src/image/codec/gdiplus-image.cpp b/src/image/codec/gdiplus-image.cpp
index 0182e579..2fa74d64 100644
--- a/src/image/codec/gdiplus-image.cpp
+++ b/src/image/codec/gdiplus-image.cpp
@@ -95,6 +95,20 @@ bool GdiPlusImageData::Open(char const *path)
return false;
}
+ /* FIXME: GDI+ doesn't know about RGBA, only ARGB. And OpenGL doesn't
+ * know about ARGB, only RGBA. So we swap bytes. We could also fix
+ * this in the shader. */
+ uint8_t *p = static_cast<uint8_t *>(bdata.Scan0);
+ for (int y = 0; y < size.y; y++)
+ for (int x = 0; x < size.x; x++)
+ {
+ uint8_t tmp = p[0];
+ *p++ = p[1];
+ *p++ = p[1];
+ *p++ = p[1];
+ *p++ = tmp;
+ }
+
return true;
}