thunderbird/SOURCES/mozilla-bmo849632.patch
2022-09-27 03:50:41 +00:00

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1.3 KiB
Diff

# HG changeset patch
# Parent 3de59fe1b8708c01e134ce698c4232b8a854f617
Problem: webGL sites are displayed in the wrong color (usually blue-ish)
Solution: Problem is with skia once again. Output of webgl seems endian-correct, but skia only
knows how to deal with little endian.
So we swizzle the output of webgl after reading it from readpixels()
Note: This does not fix all webGL sites, but is a step in the right direction
diff --git a/gfx/gl/GLContext.h b/gfx/gl/GLContext.h
--- a/gfx/gl/GLContext.h
+++ b/gfx/gl/GLContext.h
@@ -1548,16 +1548,23 @@ class GLContext : public GenericAtomicRe
AFTER_GL_CALL;
}
void raw_fReadPixels(GLint x, GLint y, GLsizei width, GLsizei height,
GLenum format, GLenum type, GLvoid* pixels) {
BEFORE_GL_CALL;
mSymbols.fReadPixels(x, y, width, height, format, type, pixels);
OnSyncCall();
+#if MOZ_BIG_ENDIAN()
+ uint8_t* itr = (uint8_t*)pixels;
+ for (GLsizei i = 0; i < width * height; i++) {
+ NativeEndian::swapToLittleEndianInPlace((uint32_t*)itr, 1);
+ itr += 4;
+ }
+#endif
AFTER_GL_CALL;
mHeavyGLCallsSinceLastFlush = true;
}
void fReadPixels(GLint x, GLint y, GLsizei width, GLsizei height,
GLenum format, GLenum type, GLvoid* pixels);
public: