Refactor the CPU copy texture code into a function in renderer utils.
BUG=angleproject:1932
Change-Id: Iab79f2a09c2d8a85d2a9dde34acf4d2151072c2b
Reviewed-on: https://chromium-review.googlesource.com/612561
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>
diff --git a/src/libANGLE/renderer/renderer_utils.cpp b/src/libANGLE/renderer/renderer_utils.cpp
index 8109a56..ed3f952 100644
--- a/src/libANGLE/renderer/renderer_utils.cpp
+++ b/src/libANGLE/renderer/renderer_utils.cpp
@@ -148,6 +148,81 @@
return map;
}
+
+void CopyColor(gl::ColorF *color)
+{
+ // No-op
+}
+
+void PremultiplyAlpha(gl::ColorF *color)
+{
+ color->red *= color->alpha;
+ color->green *= color->alpha;
+ color->blue *= color->alpha;
+}
+
+void UnmultiplyAlpha(gl::ColorF *color)
+{
+ if (color->alpha != 0.0f)
+ {
+ float invAlpha = 1.0f / color->alpha;
+ color->red *= invAlpha;
+ color->green *= invAlpha;
+ color->blue *= invAlpha;
+ }
+}
+
+void ClipChannelsR(gl::ColorF *color)
+{
+ color->green = 0.0f;
+ color->blue = 0.0f;
+ color->alpha = 1.0f;
+}
+
+void ClipChannelsRG(gl::ColorF *color)
+{
+ color->blue = 0.0f;
+ color->alpha = 1.0f;
+}
+
+void ClipChannelsRGB(gl::ColorF *color)
+{
+ color->alpha = 1.0f;
+}
+
+void ClipChannelsLuminance(gl::ColorF *color)
+{
+ color->alpha = 1.0f;
+}
+
+void ClipChannelsAlpha(gl::ColorF *color)
+{
+ color->red = 0.0f;
+ color->green = 0.0f;
+ color->blue = 0.0f;
+}
+
+void ClipChannelsNoOp(gl::ColorF *color)
+{
+}
+
+void WriteUintColor(const gl::ColorF &color,
+ ColorWriteFunction colorWriteFunction,
+ uint8_t *destPixelData)
+{
+ gl::ColorUI destColor(
+ static_cast<unsigned int>(color.red * 255), static_cast<unsigned int>(color.green * 255),
+ static_cast<unsigned int>(color.blue * 255), static_cast<unsigned int>(color.alpha * 255));
+ colorWriteFunction(reinterpret_cast<const uint8_t *>(&destColor), destPixelData);
+}
+
+void WriteFloatColor(const gl::ColorF &color,
+ ColorWriteFunction colorWriteFunction,
+ uint8_t *destPixelData)
+{
+ colorWriteFunction(reinterpret_cast<const uint8_t *>(&color), destPixelData);
+}
+
} // anonymous namespace
PackPixelsParams::PackPixelsParams()
@@ -314,4 +389,85 @@
#endif // !defined(NDEBUG)
}
+void CopyImageCHROMIUM(const uint8_t *sourceData,
+ size_t sourceRowPitch,
+ size_t sourcePixelBytes,
+ ColorReadFunction colorReadFunction,
+ uint8_t *destData,
+ size_t destRowPitch,
+ size_t destPixelBytes,
+ ColorWriteFunction colorWriteFunction,
+ GLenum destUnsizedFormat,
+ GLenum destComponentType,
+ size_t width,
+ size_t height,
+ bool unpackFlipY,
+ bool unpackPremultiplyAlpha,
+ bool unpackUnmultiplyAlpha)
+{
+ using ConversionFunction = void (*)(gl::ColorF *);
+ ConversionFunction conversionFunction = CopyColor;
+ if (unpackPremultiplyAlpha != unpackUnmultiplyAlpha)
+ {
+ if (unpackPremultiplyAlpha)
+ {
+ conversionFunction = PremultiplyAlpha;
+ }
+ else
+ {
+ conversionFunction = UnmultiplyAlpha;
+ }
+ }
+
+ auto clipChannelsFunction = ClipChannelsNoOp;
+ switch (destUnsizedFormat)
+ {
+ case GL_RED:
+ clipChannelsFunction = ClipChannelsR;
+ break;
+ case GL_RG:
+ clipChannelsFunction = ClipChannelsRG;
+ break;
+ case GL_RGB:
+ clipChannelsFunction = ClipChannelsRGB;
+ break;
+ case GL_LUMINANCE:
+ clipChannelsFunction = ClipChannelsLuminance;
+ break;
+ case GL_ALPHA:
+ clipChannelsFunction = ClipChannelsAlpha;
+ break;
+ }
+
+ auto writeFunction = (destComponentType == GL_UNSIGNED_INT) ? WriteUintColor : WriteFloatColor;
+
+ for (size_t y = 0; y < height; y++)
+ {
+ for (size_t x = 0; x < width; x++)
+ {
+ const uint8_t *sourcePixelData = sourceData + y * sourceRowPitch + x * sourcePixelBytes;
+
+ gl::ColorF sourceColor;
+ colorReadFunction(sourcePixelData, reinterpret_cast<uint8_t *>(&sourceColor));
+
+ conversionFunction(&sourceColor);
+ clipChannelsFunction(&sourceColor);
+
+ size_t destY = 0;
+ if (unpackFlipY)
+ {
+ destY += (height - 1);
+ destY -= y;
+ }
+ else
+ {
+ destY += y;
+ }
+
+ uint8_t *destPixelData = destData + destY * destRowPitch + x * destPixelBytes;
+ writeFunction(sourceColor, colorWriteFunction, destPixelData);
+ }
+ }
+}
+
} // namespace rx