Fast path for BGRA to RGBA readPixels conversions.
From http://code.google.com/p/angleproject/source/detail?r=1999
TRAC #22825
Signed-off-by: Geoff Lang
Signed-off-by: Shannon Woods
Author: Jamie Madill
git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@2033 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/libGLESv2/renderer/Renderer11.cpp b/src/libGLESv2/renderer/Renderer11.cpp
index 065202a..cf08396 100644
--- a/src/libGLESv2/renderer/Renderer11.cpp
+++ b/src/libGLESv2/renderer/Renderer11.cpp
@@ -3385,6 +3385,25 @@
memcpy(dest + j * outputPitch, source + j * inputPitch, area.width * fastPixelSize);
}
}
+ else if (textureDesc.Format == DXGI_FORMAT_B8G8R8A8_UNORM &&
+ format == GL_RGBA &&
+ type == GL_UNSIGNED_BYTE)
+ {
+ // Fast path for swapping red with blue
+ unsigned char *dest = static_cast<unsigned char*>(pixels);
+
+ for (int j = 0; j < area.height; j++)
+ {
+ for (int i = 0; i < area.width; i++)
+ {
+ unsigned int argb = *(unsigned int*)(source + 4 * i + j * inputPitch);
+ *(unsigned int*)(dest + 4 * i + j * outputPitch) =
+ (argb & 0xFF00FF00) | // Keep alpha and green
+ (argb & 0x00FF0000) >> 16 | // Move red to blue
+ (argb & 0x000000FF) << 16; // Move blue to red
+ }
+ }
+ }
else
{
gl::Color pixelColor;
diff --git a/src/libGLESv2/renderer/Renderer9.cpp b/src/libGLESv2/renderer/Renderer9.cpp
index 6c88f71..8715adc 100644
--- a/src/libGLESv2/renderer/Renderer9.cpp
+++ b/src/libGLESv2/renderer/Renderer9.cpp
@@ -2841,6 +2841,21 @@
(rect.right - rect.left) * fastPixelSize);
continue;
}
+ else if (desc.Format == D3DFMT_A8R8G8B8 &&
+ format == GL_RGBA &&
+ type == GL_UNSIGNED_BYTE)
+ {
+ // Fast path for swapping red with blue
+ for (int i = 0; i < rect.right - rect.left; i++)
+ {
+ unsigned int argb = *(unsigned int*)(source + 4 * i + j * inputPitch);
+ *(unsigned int*)(dest + 4 * i + j * outputPitch) =
+ (argb & 0xFF00FF00) | // Keep alpha and green
+ (argb & 0x00FF0000) >> 16 | // Move red to blue
+ (argb & 0x000000FF) << 16; // Move blue to red
+ }
+ continue;
+ }
for (int i = 0; i < rect.right - rect.left; i++)
{
