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Fix getBlendMode() to detect subtractive and multiplicative blend modes.

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This commit is contained in:
vrld
2011-04-03 16:54:18 +02:00
parent 01fdbac92d
commit 678f6fdadf
1 changed files with 10 additions and 5 deletions
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src/modules/graphics/opengl/Graphics.cpp
+10 -5
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@@ -568,7 +568,7 @@ namespace opengl
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
else if (mode == BLEND_MULTIPLICATIVE)
glBlendFunc(GL_DST_COLOR, GL_ONE_MINUS_SRC_ALPHA);
else
else // mode == BLEND_ADDITIVE || mode == BLEND_SUBTRACTIVE
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
}
@@ -580,16 +580,21 @@ namespace opengl
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
}
Graphics::BlendMode Graphics::getBlendMode()
Graphics::BlendMode Graphics::getBlendMode ()
{
GLint dst, src;
GLint dst, src, equation;
glGetIntegerv(GL_BLEND_DST, &dst);
glGetIntegerv(GL_BLEND_SRC, &src);
glGetIntegerv(GL_BLEND_EQUATION, &equation);
if(src == GL_SRC_ALPHA && dst == GL_ONE)
if (equation == GL_FUNC_REVERSE_SUBTRACT) // && src == GL_SRC_ALPHA && dst == GL_ONE
return BLEND_SUBTRACTIVE;
else if(src == GL_SRC_ALPHA && dst == GL_ONE) // && equation == GL_FUNC_ADD
return BLEND_ADDITIVE;
else // src == GL_SRC_ALPHA && dst == GL_ONE_MINUS_SRC_ALPHA
else if (src == GL_SRC_ALPHA && dst == GL_ONE_MINUS_SRC_ALPHA) // && equation == GL_FUNC_ADD
return BLEND_ALPHA;
else // src == GL_DST_COLOR && dst == GL_ONE_MINUS_SRC_ALPHA && equation == GL_FUNC_ADD
return BLEND_MULTIPLICATIVE;
}
Graphics::ColorMode Graphics::getColorMode()