Signed-off-by: Anuj Phogat <anuj.pho...@gmail.com>
Cc: <mesa-sta...@lists.freedesktop.org>
---
src/mesa/main/readpix.c | 18 ++++++++++++++++++
src/mesa/main/readpix.h | 4 ++++
2 files changed, 22 insertions(+)
diff --git a/src/mesa/main/readpix.c b/src/mesa/main/readpix.c
index 1038983..c98975f 100644
--- a/src/mesa/main/readpix.c
+++ b/src/mesa/main/readpix.c
@@ -60,6 +60,24 @@ _mesa_need_rgb_to_luminance_conversion(mesa_format
texFormat, GLenum format)
format == GL_LUMINANCE_ALPHA_INTEGER_EXT);
}
+/**
+ * Return true if the conversion L,I to RGB conversion is needed.
+ */
+GLboolean
+_mesa_need_luminance_to_rgb_conversion(GLenum srcBaseFormat,
+ GLenum dstBaseFormat)
+{
+ return (srcBaseFormat == GL_LUMINANCE ||
+ srcBaseFormat == GL_LUMINANCE_ALPHA ||
+ srcBaseFormat == GL_INTENSITY) &&
+ (dstBaseFormat == GL_GREEN ||
+ dstBaseFormat == GL_BLUE ||
+ dstBaseFormat == GL_RG ||
+ dstBaseFormat == GL_RGB ||
+ dstBaseFormat == GL_BGR ||
+ dstBaseFormat == GL_RGBA ||
+ dstBaseFormat == GL_BGRA);
+}
/**
* Return transfer op flags for this ReadPixels operation.
diff --git a/src/mesa/main/readpix.h b/src/mesa/main/readpix.h
index a93e263..b59decd 100644
--- a/src/mesa/main/readpix.h
+++ b/src/mesa/main/readpix.h
@@ -40,6 +40,10 @@ _mesa_readpixels_needs_slow_path(const struct gl_context
*ctx, GLenum format,
extern GLboolean
_mesa_need_rgb_to_luminance_conversion(mesa_format texFormat, GLenum format);
+extern GLboolean
+_mesa_need_luminance_to_rgb_conversion(GLenum srcBaseFormat,
+ GLenum dstBaseFormat);
+
extern GLbitfield
_mesa_get_readpixels_transfer_ops(const struct gl_context *ctx,
mesa_format texFormat,
--
1.9.3
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