namespace Msp {
namespace GL {
-enum BlendEquation
+enum BlendEquation: std::uint8_t
{
ADD,
SUBTRACT,
MAX
};
-enum BlendFactor
+enum BlendFactor: std::uint8_t
{
ZERO,
ONE,
ONE_MINUS_CONSTANT_ALPHA
};
+enum ColorWriteMask: std::uint8_t
+{
+ WRITE_NONE = 0,
+ WRITE_RED = 1,
+ WRITE_GREEN = 2,
+ WRITE_BLUE = 4,
+ WRITE_ALPHA = 8,
+ WRITE_ALL = 15
+};
+
/**
-Blends incoming fragments with those already in the framebuffer.
+Blends incoming fragment color values with those already in the framebuffer.
*/
struct Blend
{
void factors(BlendFactor, BlendFactor);
};
- bool enabled;
- BlendEquation equation;
- BlendFactor src_factor;
- BlendFactor dst_factor;
- Color constant;
+ bool enabled = false;
+ BlendEquation equation = ADD;
+ BlendFactor src_factor = ONE;
+ BlendFactor dst_factor = ZERO;
+ Color constant = { 0.0f, 0.0f, 0.0f, 0.0f };
+ ColorWriteMask write_mask = WRITE_ALL;
- Blend();
+ Blend() = default;
Blend(BlendFactor, BlendFactor);
Blend(BlendEquation, BlendFactor, BlendFactor);
+
+ bool operator==(const Blend &) const;
+ bool operator!=(const Blend &b) const { return !operator==(b); }
};
-unsigned get_gl_blend_equation(BlendEquation);
-unsigned get_gl_blend_factor(BlendFactor);
+inline bool Blend::operator==(const Blend &other) const
+{
+ return enabled==other.enabled && equation==other.equation && src_factor==other.src_factor &&
+ dst_factor==other.dst_factor && constant==other.constant && write_mask==other.write_mask;
+}
+
+
+inline ColorWriteMask operator|(ColorWriteMask m1, ColorWriteMask m2)
+{ return static_cast<ColorWriteMask>(static_cast<int>(m1)|static_cast<int>(m2)); }
void operator>>(const LexicalConverter &, BlendEquation &);
void operator<<(LexicalConverter &, BlendEquation);
void operator>>(const LexicalConverter &, BlendFactor &);
void operator<<(LexicalConverter &, BlendFactor);
+void operator>>(const LexicalConverter &, ColorWriteMask &);
+void operator<<(LexicalConverter &, ColorWriteMask);
+
} // namespace GL
} // namespace Msp
+#include "blend_backend.h"
+
#endif