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OpenGL: Respect color-read allow register

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This commit is contained in:
Jannik Vogel 2016-03-31 16:43:28 +02:00
parent eb77c1ed3b
commit dad051f55f
1 changed files with 88 additions and 5 deletions
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93
src/video_core/renderer_opengl/gl_rasterizer.cpp
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@ -308,6 +308,12 @@ void RasterizerOpenGL::NotifyPicaRegisterChanged(u32 id) {
SyncColorWriteMask();
break;
// Color read mask
case PICA_REG_INDEX(framebuffer.allow_color_read):
SyncLogicOp();
SyncBlendFuncs();
break;
// Logic op
case PICA_REG_INDEX(output_merger.logic_op):
SyncLogicOp();
@ -883,10 +889,33 @@ void RasterizerOpenGL::SyncBlendEnabled() {
void RasterizerOpenGL::SyncBlendFuncs() {
const auto& regs = Pica::g_state.regs;
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);
state.blend.dst_a_func = PicaToGL::BlendFunc(regs.output_merger.alpha_blending.factor_dest_a);
// This function pretends the destination read was 0x00 if the reads are not allowed
auto BlendAllowedFunc = [&](bool dest, Pica::Regs::BlendFactor factor) -> GLenum {
if (regs.framebuffer.allow_color_read == 0x0) {
// Destination would only read zero, so we can multiply by ZERO in blend func
if (dest)
return GL_ZERO;
if (factor == Pica::Regs::BlendFactor::DestColor ||
factor == Pica::Regs::BlendFactor::DestAlpha)
return GL_ZERO;
if (factor == Pica::Regs::BlendFactor::OneMinusDestColor ||
factor == Pica::Regs::BlendFactor::OneMinusDestAlpha)
return GL_ONE;
}
return PicaToGL::BlendFunc(factor);
};
state.blend.src_rgb_func = BlendAllowedFunc(false, regs.output_merger.alpha_blending.factor_source_rgb);
state.blend.dst_rgb_func = BlendAllowedFunc(true, regs.output_merger.alpha_blending.factor_dest_rgb);
state.blend.src_a_func = BlendAllowedFunc(false, regs.output_merger.alpha_blending.factor_source_a);
state.blend.dst_a_func = BlendAllowedFunc(true, regs.output_merger.alpha_blending.factor_dest_a);
}
void RasterizerOpenGL::SyncBlendColor() {
@ -906,7 +935,61 @@ void RasterizerOpenGL::SyncAlphaTest() {
}
void RasterizerOpenGL::SyncLogicOp() {
state.logic_op = PicaToGL::LogicOp(Pica::g_state.regs.output_merger.logic_op);
const auto& regs = Pica::g_state.regs;
if (regs.framebuffer.allow_color_read == 0x0) {
// Pretend that the destination reads always return 0
switch (regs.output_merger.logic_op) {
// Always 0
case Pica::Regs::LogicOp::Clear:
case Pica::Regs::LogicOp::And:
case Pica::Regs::LogicOp::AndInverted:
state.logic_op = GL_CLEAR;
break;
// Always s
case Pica::Regs::LogicOp::AndReverse:
case Pica::Regs::LogicOp::Copy:
case Pica::Regs::LogicOp::Or:
case Pica::Regs::LogicOp::Xor:
state.logic_op = GL_COPY;
break;
// Always 1
case Pica::Regs::LogicOp::Set:
case Pica::Regs::LogicOp::Invert:
case Pica::Regs::LogicOp::Nand:
case Pica::Regs::LogicOp::OrReverse:
state.logic_op = GL_SET;
break;
// Always ~s
case Pica::Regs::LogicOp::CopyInverted:
case Pica::Regs::LogicOp::Nor:
case Pica::Regs::LogicOp::Equiv:
case Pica::Regs::LogicOp::OrInverted:
state.logic_op = GL_COPY_INVERTED;
break;
// FIXME: Decide for one of those:
//a. NoOp means reading zero, writing back zero
//b. NoOp means not touching the framebuffer
case Pica::Regs::LogicOp::NoOp:
state.logic_op = GL_CLEAR; // a
state.logic_op = GL_NOOP; // b
break;
default:
LOG_CRITICAL(Render_OpenGL, "Unknown logic op %d", regs.output_merger.logic_op);
UNREACHABLE();
break;
}
} else {
state.logic_op = PicaToGL::LogicOp(regs.output_merger.logic_op);
}
}
void RasterizerOpenGL::SyncColorWriteMask() {