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authorSergey Sharybin <sergey.vfx@gmail.com>2013-04-27 21:50:11 +0400
committerSergey Sharybin <sergey.vfx@gmail.com>2013-04-27 21:50:11 +0400
commit69b0b0a6240635bf6264835a2da928aa48dcb5be (patch)
treea99236e879c58af4c055e0f4b581fa6cdc954b71 /intern/opencolorio
parent1fe4a273053abaa22a7d4b8af2475f1a05728b47 (diff)
Fix for fix in alpha de-premul
We do not need to premul shader result, opengl is already configured for straight alpha.
Diffstat (limited to 'intern/opencolorio')
-rw-r--r--intern/opencolorio/ocio_impl_glsl.cc8
1 files changed, 4 insertions, 4 deletions
diff --git a/intern/opencolorio/ocio_impl_glsl.cc b/intern/opencolorio/ocio_impl_glsl.cc
index 0f8ab5b9905..0c96a000b9e 100644
--- a/intern/opencolorio/ocio_impl_glsl.cc
+++ b/intern/opencolorio/ocio_impl_glsl.cc
@@ -79,6 +79,10 @@ typedef struct OCIO_GLSLDrawState {
} OCIO_GLSLDrawState;
/* Hardcoded to do alpha predivide before color space conversion */
+/* NOTE: This is true we only do de-premul here and NO premul
+ * and the reason is simple -- opengl is always configured
+ * for straight alpha at this moment
+ */
static const char *g_fragShaderText = ""
"\n"
"uniform sampler2D tex1;\n"
@@ -99,10 +103,6 @@ static const char *g_fragShaderText = ""
" col[2] *= inv_alpha;\n"
"\n"
" gl_FragColor = OCIODisplay(col, tex2);\n"
-"\n"
-" gl_FragColor[0] *= alpha;\n"
-" gl_FragColor[1] *= alpha;\n"
-" gl_FragColor[2] *= alpha;\n"
" }\n"
"\n"
"}\n";