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PICA: Implement scissor test

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Subv 2015-12-02 13:23:51 -05:00 • committed by Yuri Kunde Schlesner
parent 9cde5cbbd3
commit f9be06b15f
5 changed files with 105 additions and 3 deletions
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26
src/video_core/renderer_opengl/gl_rasterizer.cpp
View file

@ -353,6 +353,15 @@ void RasterizerOpenGL::NotifyPicaRegisterChanged(u32 id) {
SyncColorWriteMask();
break;
// Scissor test
case PICA_REG_INDEX(scissor_test.mode):
shader_dirty = true;
break;
case PICA_REG_INDEX(scissor_test.right):
case PICA_REG_INDEX(scissor_test.left_minus_1):
SyncScissorTest();
break;
// Logic op
case PICA_REG_INDEX(output_merger.logic_op):
SyncLogicOp();
@ -1002,6 +1011,7 @@ void RasterizerOpenGL::SetShader() {
SyncDepthOffset();
SyncAlphaTest();
SyncCombinerColor();
SyncScissorTest();
auto& tev_stages = Pica::g_state.regs.GetTevStages();
for (int index = 0; index < tev_stages.size(); ++index)
SyncTevConstColor(index, tev_stages[index]);
@ -1166,6 +1176,22 @@ void RasterizerOpenGL::SyncDepthTest() {
PicaToGL::CompareFunc(regs.output_merger.depth_test_func) : GL_ALWAYS;
}
void RasterizerOpenGL::SyncScissorTest() {
const auto& regs = Pica::g_state.regs;
if (uniform_block_data.data.scissor_right != regs.scissor_test.right ||
uniform_block_data.data.scissor_bottom != regs.scissor_test.bottom ||
uniform_block_data.data.scissor_left != regs.scissor_test.GetLeft() ||
uniform_block_data.data.scissor_top != regs.scissor_test.GetTop()) {
uniform_block_data.data.scissor_right = regs.scissor_test.right;
uniform_block_data.data.scissor_bottom = regs.scissor_test.bottom;
uniform_block_data.data.scissor_left = regs.scissor_test.GetLeft();
uniform_block_data.data.scissor_top = regs.scissor_test.GetTop();
uniform_block_data.dirty = true;
}
}
void RasterizerOpenGL::SyncCombinerColor() {
auto combiner_color = PicaToGL::ColorRGBA8(Pica::g_state.regs.tev_combiner_buffer_color.raw);
if (combiner_color != uniform_block_data.data.tev_combiner_buffer_color) {

12
src/video_core/renderer_opengl/gl_rasterizer.h
View file

@ -56,6 +56,8 @@ union PicaShaderConfig {
const auto& regs = Pica::g_state.regs;
state.scissor_test_mode = regs.scissor_test.mode;
state.depthmap_enable = regs.depthmap_enable;
state.alpha_test_func = regs.output_merger.alpha_test.enable ?
@ -172,6 +174,7 @@ union PicaShaderConfig {
struct State {
Pica::Regs::CompareFunc alpha_test_func;
Pica::Regs::ScissorMode scissor_test_mode;
Pica::Regs::TextureConfig::TextureType texture0_type;
std::array<TevStageConfigRaw, 6> tev_stages;
u8 combiner_buffer_input;
@ -328,6 +331,10 @@ private:
GLint alphatest_ref;
GLfloat depth_scale;
GLfloat depth_offset;
GLint scissor_right;
GLint scissor_bottom;
GLint scissor_left;
GLint scissor_top;
alignas(16) GLvec3 fog_color;
alignas(16) GLvec3 lighting_global_ambient;
LightSrc light_src[8];
@ -335,7 +342,7 @@ private:
alignas(16) GLvec4 tev_combiner_buffer_color;
};
static_assert(sizeof(UniformData) == 0x3A0, "The size of the UniformData structure has changed, update the structure in the shader");
static_assert(sizeof(UniformData) == 0x3B0, "The size of the UniformData structure has changed, update the structure in the shader");
static_assert(sizeof(UniformData) < 16384, "UniformData structure must be less than 16kb as per the OpenGL spec");
/// Sets the OpenGL shader in accordance with the current PICA register state
@ -384,6 +391,9 @@ private:
/// Syncs the depth test states to match the PICA register
void SyncDepthTest();
/// Syncs the scissor test state to match the PICA register
void SyncScissorTest();
/// Syncs the TEV combiner color buffer to match the PICA register
void SyncCombinerColor();

16
src/video_core/renderer_opengl/gl_shader_gen.cpp
View file

@ -539,6 +539,8 @@ in float texcoord0_w;
in vec4 normquat;
in vec3 view;
in vec4 gl_FragCoord;
out vec4 color;
struct LightSrc {
@ -555,6 +557,10 @@ layout (std140) uniform shader_data {
int alphatest_ref;
float depth_scale;
float depth_offset;
int scissor_right;
int scissor_bottom;
int scissor_left;
int scissor_top;
vec3 fog_color;
vec3 lighting_global_ambient;
LightSrc light_src[NUM_LIGHTS];
@ -582,6 +588,16 @@ vec4 secondary_fragment_color = vec4(0.0);
return out;
}
// Append the scissor test
if (state.scissor_test_mode == Regs::ScissorMode::Include || state.scissor_test_mode == Regs::ScissorMode::Exclude) {
out += "if (scissor_left <= scissor_right || scissor_top <= scissor_bottom) discard;\n";
out += "if (";
// Negate the condition if we have to keep only the pixels outside the scissor box
if (state.scissor_test_mode == Regs::ScissorMode::Include)
out += "!";
out += "(gl_FragCoord.x >= scissor_right && gl_FragCoord.x <= scissor_left && gl_FragCoord.y >= scissor_bottom && gl_FragCoord.y <= scissor_top)) discard;\n";
}
out += "float z_over_w = 1.0 - gl_FragCoord.z * 2.0;\n";
out += "float depth = z_over_w * depth_scale + depth_offset;\n";
if (state.depthmap_enable == Pica::Regs::DepthBuffering::WBuffering) {