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add BLEND_WEIGHTED_MULTIPLY and BLEND_INVERT_DEST blend modes

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Glenn Maynard
2006-07-27 01:34:57 +00:00
parent 79ebe8805d
commit 9ed6603349
3 changed files with 21 additions and 1 deletions
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stepmania/src/Actor.cpp
+2
View File
@@ -1175,6 +1175,8 @@ void Actor::SetBlendModeString( const RString &s )
{
if (s.EqualsNoCase("normal")) this->SetBlendMode( BLEND_NORMAL );
else if(s.EqualsNoCase("add")) this->SetBlendMode( BLEND_ADD );
else if(s.EqualsNoCase("weightedmultiply")) this->SetBlendMode( BLEND_WEIGHTED_MULTIPLY );
else if(s.EqualsNoCase("invertdest")) this->SetBlendMode( BLEND_INVERT_DEST );
else if(s.EqualsNoCase("noeffect")) this->SetBlendMode( BLEND_NO_EFFECT );
else ASSERT(0);
}
stepmania/src/RageDisplay_OGL.cpp
+18
View File
@@ -1416,6 +1416,14 @@ void RageDisplay_OGL::SetBlendMode( BlendMode mode )
{
glEnable(GL_BLEND);
if( GLExt.glBlendEquation != NULL )
{
if( mode == BLEND_INVERT_DEST )
GLExt.glBlendEquation( GL_FUNC_SUBTRACT );
else
GLExt.glBlendEquation( GL_FUNC_ADD );
}
switch( mode )
{
case BLEND_NORMAL:
@@ -1424,6 +1432,16 @@ void RageDisplay_OGL::SetBlendMode( BlendMode mode )
case BLEND_ADD:
glBlendFunc( GL_SRC_ALPHA, GL_ONE );
break;
case BLEND_WEIGHTED_MULTIPLY:
/* output = 2*(dst*src). 0.5,0.5,0.5 is identity; darker colors darken the image,
* and brighter colors lighten the image. */
glBlendFunc( GL_DST_COLOR, GL_SRC_COLOR );
break;
case BLEND_INVERT_DEST:
/* out = src - dst. The source color should almost always be #FFFFFF, to make it "1 - dst". */
glBlendFunc( GL_ONE, GL_ONE );
break;
case BLEND_NO_EFFECT:
/* XXX: Would it be faster and have the same effect to say glDisable(GL_COLOR_WRITEMASK)? */
glBlendFunc( GL_ZERO, GL_ONE );
stepmania/src/RageTypes.h
+1 -1
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@@ -3,7 +3,7 @@
#ifndef RAGETYPES_H
#define RAGETYPES_H
enum BlendMode { BLEND_NORMAL, BLEND_ADD, BLEND_NO_EFFECT, BLEND_INVALID };
enum BlendMode { BLEND_NORMAL, BLEND_ADD, BLEND_WEIGHTED_MULTIPLY, BLEND_INVERT_DEST, BLEND_NO_EFFECT, BLEND_INVALID };
enum CullMode { CULL_BACK, CULL_FRONT, CULL_NONE };
enum ZTestMode { ZTEST_OFF, ZTEST_WRITE_ON_PASS, ZTEST_WRITE_ON_FAIL };
enum PolygonMode { POLYGON_FILL, POLYGON_LINE };