-#include <msp/gl/extensions/ext_blend_minmax.h>
-#include <msp/gl/extensions/ext_blend_subtract.h>
#include <msp/strings/format.h>
+#include <msp/strings/utils.h>
#include "blend.h"
using namespace std;
namespace Msp {
namespace GL {
-Blend::Blend():
- eq(ADD),
- src_factor(ONE),
- dst_factor(ZERO)
-{ }
-
Blend::Blend(BlendFactor sf, BlendFactor df):
- eq(ADD),
+ enabled(true),
src_factor(sf),
dst_factor(df)
{ }
Blend::Blend(BlendEquation e, BlendFactor sf, BlendFactor df):
- eq(e),
+ enabled(true),
+ equation(e),
src_factor(sf),
dst_factor(df)
+{ }
+
+
+Blend::Loader::Loader(Blend &b):
+ ObjectLoader<Blend>(b)
{
- if(eq==MIN || eq==MAX)
- static Require _req(EXT_blend_minmax);
- else if(eq==SUBTRACT || eq==REVERSE_SUBTRACT)
- static Require _req(EXT_blend_subtract);
+ add("equation", &Loader::equation);
+ add("factors", &Loader::factors);
+ add("constant", &Loader::constant);
}
-void Blend::bind() const
+void Blend::Loader::constant(float r, float g, float b, float a)
{
- if(set_current(this))
- {
- glEnable(GL_BLEND);
- if(EXT_blend_minmax)
- glBlendEquation(eq);
- glBlendFunc(src_factor, dst_factor);
- }
+ obj.constant = Color(r, g, b, a);
}
-void Blend::unbind()
+void Blend::Loader::equation(BlendEquation eq)
{
- if(set_current(0))
- glDisable(GL_BLEND);
+ obj.enabled = true;
+ obj.equation = eq;
}
-const Blend &Blend::alpha()
+void Blend::Loader::factors(BlendFactor sf, BlendFactor df)
{
- static Blend blend(SRC_ALPHA, ONE_MINUS_SRC_ALPHA);
- return blend;
+ obj.enabled = true;
+ obj.src_factor = sf;
+ obj.dst_factor = df;
}
-const Blend &Blend::additive()
+
+void operator>>(const LexicalConverter &conv, BlendEquation &eq)
{
- static Blend blend(ONE, ONE);
- return blend;
+ const string &str = conv.get();
+ if(str=="ADD")
+ eq = ADD;
+ else if(str=="SUBTRACT")
+ eq = SUBTRACT;
+ else if(str=="REVERSE_SUBTRACT")
+ eq = REVERSE_SUBTRACT;
+ else if(str=="MIN")
+ eq = MIN;
+ else if(str=="MAX")
+ eq = MAX;
+ else
+ throw lexical_error(format("conversion of '%s' to BlendEquation", str));
}
-const Blend &Blend::additive_alpha()
+void operator<<(LexicalConverter &conv, BlendEquation eq)
{
- static Blend blend(SRC_ALPHA, ONE);
- return blend;
+ switch(eq)
+ {
+ case ADD: conv.result("ADD"); break;
+ case SUBTRACT: conv.result("SUBTRACT"); break;
+ case REVERSE_SUBTRACT: conv.result("REVERSE_SUBTRACT"); break;
+ case MIN: conv.result("MIN"); break;
+ case MAX: conv.result("MAX"); break;
+ default: conv.result(format("BlendEquation(%#x)", static_cast<int>(eq)));
+ }
}
void operator>>(const LexicalConverter &conv, BlendFactor &factor)
}
}
+void operator>>(const LexicalConverter &conv, ColorWriteMask &mask)
+{
+ ColorWriteMask result = WRITE_NONE;
+ for(const string &p: split(conv.get(), '_'))
+ {
+ if(p=="ALL")
+ result = result|WRITE_ALL;
+ else if(p=="RED")
+ result = result|WRITE_RED;
+ else if(p=="GREEN")
+ result = result|WRITE_GREEN;
+ else if(p=="BLUE")
+ result = result|WRITE_BLUE;
+ else if(p=="ALPHA")
+ result = result|WRITE_ALPHA;
+ else
+ throw lexical_error(format("conversion of '%s' to ColorWriteMask", conv.get()));
+ }
+ mask = result;
+}
+
+void operator<<(LexicalConverter &conv, ColorWriteMask mask)
+{
+ if(mask==WRITE_ALL)
+ conv.result("ALL");
+ else if(mask&~WRITE_ALL)
+ conv.result(format("ColorWriteMask(%#x)", static_cast<int>(mask)));
+ else
+ {
+ string result;
+ if(mask&WRITE_RED)
+ result = "RED";
+ if(mask&WRITE_GREEN)
+ append(result, "_", "GREEN");
+ if(mask&WRITE_BLUE)
+ append(result, "_", "BLUE");
+ if(mask&WRITE_ALPHA)
+ append(result, "_", "ALPHA");
+ conv.result(result);
+ }
+}
+
} // namespace GL
} // namespace Msp