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Merge pull request #1786 from JayFoxRox/blend-equation 

OpenGL: Support blend equation
This commit is contained in:
bunnei 2016-05-16 20:00:21 -04:00
parent f40fabd688 5864cb7e00
commit e5599ed300
4 changed files with 31 additions and 0 deletions
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2
src/video_core/renderer_opengl/gl_rasterizer.cpp
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@ -947,6 +947,8 @@ void RasterizerOpenGL::SyncBlendEnabled() {
void RasterizerOpenGL::SyncBlendFuncs() {
const auto& regs = Pica::g_state.regs;
state.blend.rgb_equation = PicaToGL::BlendEquation(regs.output_merger.alpha_blending.blend_equation_rgb);
state.blend.a_equation = PicaToGL::BlendEquation(regs.output_merger.alpha_blending.blend_equation_a);
state.blend.src_rgb_func = PicaToGL::BlendFunc(regs.output_merger.alpha_blending.factor_source_rgb);
state.blend.dst_rgb_func = PicaToGL::BlendFunc(regs.output_merger.alpha_blending.factor_dest_rgb);
state.blend.src_a_func = PicaToGL::BlendFunc(regs.output_merger.alpha_blending.factor_source_a);

7
src/video_core/renderer_opengl/gl_state.cpp
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@ -36,6 +36,8 @@ OpenGLState::OpenGLState() {
stencil.action_stencil_fail = GL_KEEP;
blend.enabled = false;
blend.rgb_equation = GL_FUNC_ADD;
blend.a_equation = GL_FUNC_ADD;
blend.src_rgb_func = GL_ONE;
blend.dst_rgb_func = GL_ZERO;
blend.src_a_func = GL_ONE;
@ -165,6 +167,11 @@ void OpenGLState::Apply() const {
blend.src_a_func, blend.dst_a_func);
}
if (blend.rgb_equation != cur_state.blend.rgb_equation ||
blend.a_equation != cur_state.blend.a_equation) {
glBlendEquationSeparate(blend.rgb_equation, blend.a_equation);
}
if (logic_op != cur_state.logic_op) {
glLogicOp(logic_op);
}

2
src/video_core/renderer_opengl/gl_state.h
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@ -40,6 +40,8 @@ public:
struct {
bool enabled; // GL_BLEND
GLenum rgb_equation; // GL_BLEND_EQUATION_RGB
GLenum a_equation; // GL_BLEND_EQUATION_ALPHA
GLenum src_rgb_func; // GL_BLEND_SRC_RGB
GLenum dst_rgb_func; // GL_BLEND_DST_RGB
GLenum src_a_func; // GL_BLEND_SRC_ALPHA

20
src/video_core/renderer_opengl/pica_to_gl.h
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@ -78,6 +78,26 @@ inline GLenum WrapMode(Pica::Regs::TextureConfig::WrapMode mode) {
return gl_mode;
}
inline GLenum BlendEquation(Pica::Regs::BlendEquation equation) {
static const GLenum blend_equation_table[] = {
GL_FUNC_ADD, // BlendEquation::Add
GL_FUNC_SUBTRACT, // BlendEquation::Subtract
GL_FUNC_REVERSE_SUBTRACT, // BlendEquation::ReverseSubtract
GL_MIN, // BlendEquation::Min
GL_MAX, // BlendEquation::Max
};
// Range check table for input
if (static_cast<size_t>(equation) >= ARRAY_SIZE(blend_equation_table)) {
LOG_CRITICAL(Render_OpenGL, "Unknown blend equation %d", equation);
UNREACHABLE();
return GL_FUNC_ADD;
}
return blend_equation_table[(unsigned)equation];
}
inline GLenum BlendFunc(Pica::Regs::BlendFactor factor) {
static const GLenum blend_func_table[] = {
GL_ZERO, // BlendFactor::Zero