Add overloads of keyframe uniform statements without size suffixes

[libs/gl.git] / source / blend.cpp

diff --git a/source/blend.cpp b/source/blend.cpp
index 03fc0f02baf32c917e1be36ad9ec33f7237f9233..3327885c74c1ef34b7a5c1d111f22935a8639de0 100644 (file)
--- a/source/blend.cpp
+++ b/source/blend.cpp
@@ -1,6 +1,9 @@
+#include <msp/gl/extensions/ext_blend_minmax.h>
+#include <msp/gl/extensions/ext_blend_subtract.h>
+#include <msp/strings/format.h>
 #include "blend.h"
-#include "extension.h"
-#include "version_1_2.h"
+
+using namespace std;
 
 namespace Msp {
 namespace GL {
@@ -22,8 +25,10 @@ Blend::Blend(BlendEquation e, BlendFactor sf, BlendFactor df):
        src_factor(sf),
        dst_factor(df)
 {
-       if(eq!=ADD)
-               static RequireVersion _ver(1, 2);
+       if(eq==MIN || eq==MAX)
+               static Require _req(EXT_blend_minmax);
+       else if(eq==SUBTRACT || eq==REVERSE_SUBTRACT)
+               static Require _req(EXT_blend_subtract);
 }
 
 void Blend::bind() const
@@ -31,7 +36,7 @@ void Blend::bind() const
        if(set_current(this))
        {
                glEnable(GL_BLEND);
-               if(glBlendEquation)
+               if(EXT_blend_minmax)
                        glBlendEquation(eq);
                glBlendFunc(src_factor, dst_factor);
        }
@@ -49,5 +54,74 @@ const Blend &Blend::alpha()
        return blend;
 }
 
+const Blend &Blend::additive()
+{
+       static Blend blend(ONE, ONE);
+       return blend;
+}
+
+const Blend &Blend::additive_alpha()
+{
+       static Blend blend(SRC_ALPHA, ONE);
+       return blend;
+}
+
+void operator>>(const LexicalConverter &conv, BlendFactor &factor)
+{
+       const string &str = conv.get();
+       if(str=="ZERO")
+               factor = ZERO;
+       else if(str=="ONE")
+               factor = ONE;
+       else if(str=="SRC_COLOR")
+               factor = SRC_COLOR;
+       else if(str=="ONE_MINUS_SRC_COLOR")
+               factor = ONE_MINUS_SRC_COLOR;
+       else if(str=="SRC_ALPHA")
+               factor = SRC_ALPHA;
+       else if(str=="ONE_MINUS_SRC_ALPHA")
+               factor = ONE_MINUS_SRC_ALPHA;
+       else if(str=="DST_COLOR")
+               factor = DST_COLOR;
+       else if(str=="ONE_MINUS_DST_COLOR")
+               factor = ONE_MINUS_DST_COLOR;
+       else if(str=="DST_ALPHA")
+               factor = DST_ALPHA;
+       else if(str=="ONE_MINUS_DST_ALPHA")
+               factor = ONE_MINUS_DST_ALPHA;
+       else if(str=="CONSTANT_COLOR")
+               factor = CONSTANT_COLOR;
+       else if(str=="ONE_MINUS_CONSTANT_COLOR")
+               factor = ONE_MINUS_CONSTANT_COLOR;
+       else if(str=="CONSTANT_ALPHA")
+               factor = CONSTANT_ALPHA;
+       else if(str=="ONE_MINUS_CONSTANT_ALPHA")
+               factor = ONE_MINUS_CONSTANT_ALPHA;
+       else
+               throw lexical_error(format("conversion of '%s' to BlendFactor", str));
+}
+
+void operator<<(LexicalConverter &conv, BlendFactor factor)
+{
+       switch(factor)
+       {
+       case ZERO: conv.result("ZERO"); break;
+       case ONE: conv.result("ONE"); break;
+       case SRC_COLOR: conv.result("SRC_COLOR"); break;
+       case ONE_MINUS_SRC_COLOR: conv.result("ONE_MINUS_SRC_COLOR"); break;
+       case SRC_ALPHA: conv.result("SRC_ALPHA"); break;
+       case ONE_MINUS_SRC_ALPHA: conv.result("ONE_MINUS_SRC_ALPHA"); break;
+       case DST_COLOR: conv.result("DST_COLOR"); break;
+       case ONE_MINUS_DST_COLOR: conv.result("ONE_MINUS_DST_COLOR"); break;
+       case DST_ALPHA: conv.result("DST_ALPHA"); break;
+       case ONE_MINUS_DST_ALPHA: conv.result("ONE_MINUS_DST_ALPHA"); break;
+       case CONSTANT_COLOR: conv.result("CONSTANT_COLOR"); break;
+       case ONE_MINUS_CONSTANT_COLOR: conv.result("ONE_MINUS_CONSTANT_COLOR"); break;
+       case CONSTANT_ALPHA: conv.result("CONSTANT_ALPHA"); break;
+       case ONE_MINUS_CONSTANT_ALPHA: conv.result("ONE_MINUS_CONSTANT_ALPHA"); break;
+       default: conv.result(format("BlendFactor(%#x)", static_cast<int>(factor)));
+       }
+}
+
 } // namespace GL
 } // namespace Msp