void GLBackend::do_setStateBlend(State::BlendFunction function) {
if (_pipeline._stateCache.blendFunction != function) {
if (function.isEnabled()) {
glEnable(GL_BLEND);
static GLenum GL_BLEND_OPS[] = {
GL_FUNC_ADD,
GL_FUNC_SUBTRACT,
GL_FUNC_REVERSE_SUBTRACT,
GL_MIN,
GL_MAX };
glBlendEquationSeparate(GL_BLEND_OPS[function.getOperationColor()], GL_BLEND_OPS[function.getOperationAlpha()]);
(void) CHECK_GL_ERROR();
static GLenum BLEND_ARGS[] = {
GL_ZERO,
GL_ONE,
GL_SRC_COLOR,
GL_ONE_MINUS_SRC_COLOR,
GL_SRC_ALPHA,
GL_ONE_MINUS_SRC_ALPHA,
GL_DST_ALPHA,
GL_ONE_MINUS_DST_ALPHA,
GL_DST_COLOR,
GL_ONE_MINUS_DST_COLOR,
GL_SRC_ALPHA_SATURATE,
GL_CONSTANT_COLOR,
GL_ONE_MINUS_CONSTANT_COLOR,
GL_CONSTANT_ALPHA,
GL_ONE_MINUS_CONSTANT_ALPHA,
};
glBlendFuncSeparate(BLEND_ARGS[function.getSourceColor()], BLEND_ARGS[function.getDestinationColor()],
BLEND_ARGS[function.getSourceAlpha()], BLEND_ARGS[function.getDestinationAlpha()]);
(void) CHECK_GL_ERROR();
} else {
glDisable(GL_BLEND);
}
_pipeline._stateCache.blendFunction = function;
}
}
void GLBackend::do_setStateBlend(State::BlendFunction function) {
if (_pipeline._stateCache.blendFunction != function) {
if (function.isEnabled()) {
glEnable(GL_BLEND);
glBlendEquationSeparate(BLEND_OPS_TO_GL[function.getOperationColor()], BLEND_OPS_TO_GL[function.getOperationAlpha()]);
(void)CHECK_GL_ERROR();
glBlendFuncSeparate(BLEND_ARGS_TO_GL[function.getSourceColor()], BLEND_ARGS_TO_GL[function.getDestinationColor()],
BLEND_ARGS_TO_GL[function.getSourceAlpha()], BLEND_ARGS_TO_GL[function.getDestinationAlpha()]);
} else {
glDisable(GL_BLEND);
}
(void)CHECK_GL_ERROR();
_pipeline._stateCache.blendFunction = function;
}
}