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pull out glBlendFunc call

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Glenn Maynard
2007-02-13 05:01:25 +00:00
parent 2f18e94d49
commit 4acd7f3971
1 changed files with 8 additions and 6 deletions
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stepmania/src/RageDisplay_OGL.cpp
+8 -6
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@@ -1459,29 +1459,31 @@ void RageDisplay_OGL::SetBlendMode( BlendMode mode )
GLExt.glBlendEquation( GL_FUNC_ADD ); GLExt.glBlendEquation( GL_FUNC_ADD );
} }
int iSourceRGB, iDestRGB;
switch( mode ) switch( mode )
{ {
case BLEND_NORMAL: case BLEND_NORMAL:
glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ); iSourceRGB = GL_SRC_ALPHA; iDestRGB = GL_ONE_MINUS_SRC_ALPHA;
break; break;
case BLEND_ADD: case BLEND_ADD:
glBlendFunc( GL_SRC_ALPHA, GL_ONE ); iSourceRGB = GL_SRC_ALPHA; iDestRGB = GL_ONE;
break; break;
case BLEND_WEIGHTED_MULTIPLY: case BLEND_WEIGHTED_MULTIPLY:
/* output = 2*(dst*src). 0.5,0.5,0.5 is identity; darker colors darken the image, /* output = 2*(dst*src). 0.5,0.5,0.5 is identity; darker colors darken the image,
* and brighter colors lighten the image. */ * and brighter colors lighten the image. */
glBlendFunc( GL_DST_COLOR, GL_SRC_COLOR ); iSourceRGB = GL_DST_COLOR; iDestRGB = GL_SRC_COLOR;
break; break;
case BLEND_INVERT_DEST: case BLEND_INVERT_DEST:
/* out = src - dst. The source color should almost always be #FFFFFF, to make it "1 - dst". */ /* out = src - dst. The source color should almost always be #FFFFFF, to make it "1 - dst". */
glBlendFunc( GL_ONE, GL_ONE ); iSourceRGB = GL_ONE; iDestRGB = GL_ONE;
break; break;
case BLEND_NO_EFFECT: case BLEND_NO_EFFECT:
glBlendFunc( GL_ZERO, GL_ONE ); iSourceRGB = GL_ZERO; iDestRGB = GL_ONE;
break; break;
DEFAULT_FAIL( mode ); DEFAULT_FAIL( mode );
} }
glBlendFunc( iSourceRGB, iDestRGB );
} }
bool RageDisplay_OGL::IsZWriteEnabled() const bool RageDisplay_OGL::IsZWriteEnabled() const