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gl_shader_gen: Optimize code for AppendAlphaTestCondition. 

- Also add a comment to AppendColorCombiner.
This commit is contained in:
bunnei 2015-10-21 00:04:02 -04:00
parent e7b1f2ae0a
commit e663f5c914
1 changed files with 11 additions and 16 deletions
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27
src/video_core/renderer_opengl/gl_shader_gen.cpp
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@ -205,7 +205,7 @@ static void AppendColorCombiner(std::string& out, TevStageConfig::Operation oper
LOG_CRITICAL(Render_OpenGL, "Unknown color combiner operation: %u", operation);
break;
}
out += ", vec3(0.0), vec3(1.0))";
out += ", vec3(0.0), vec3(1.0))"; // Clamp result to 0.0, 1.0
}
/// Writes the combiner function for the alpha component for the specified TEV stage operation
@ -257,23 +257,18 @@ static void AppendAlphaTestCondition(std::string& out, Regs::CompareFunc func) {
out += "false";
break;
case CompareFunc::Equal:
out += "int(last_tex_env_out.a * 255.0f) != alphatest_ref";
break;
case CompareFunc::NotEqual:
out += "int(last_tex_env_out.a * 255.0f) == alphatest_ref";
break;
case CompareFunc::LessThan:
out += "int(last_tex_env_out.a * 255.0f) >= alphatest_ref";
break;
case CompareFunc::LessThanOrEqual:
out += "int(last_tex_env_out.a * 255.0f) > alphatest_ref";
break;
case CompareFunc::GreaterThan:
out += "int(last_tex_env_out.a * 255.0f) <= alphatest_ref";
break;
case CompareFunc::GreaterThanOrEqual:
out += "int(last_tex_env_out.a * 255.0f) < alphatest_ref";
{
static const char* op[] = { "!=", "==", ">=", ">", "<=", "<", };
unsigned index = (unsigned)func - (unsigned)CompareFunc::Equal;
out += "int(last_tex_env_out.a * 255.0f) " + std::string(op[index]) + " alphatest_ref";
break;
}
default:
out += "false";
LOG_CRITICAL(Render_OpenGL, "Unknown alpha test condition %u", func);
@ -337,10 +332,10 @@ out vec4 color;
)";
using Uniform = RasterizerOpenGL::PicaShader::Uniform;
out += "layout(location = " + std::to_string(Uniform::AlphaTestRef) + ") uniform int alphatest_ref;\n";
out += "layout(location = " + std::to_string(Uniform::TevConstColors) + ") uniform vec4 const_color[NUM_TEV_STAGES];\n";
out += "layout(location = " + std::to_string(Uniform::Texture0) + ") uniform sampler2D tex[3];\n";
out += "layout(location = " + std::to_string(Uniform::TevCombinerBufferColor) + ") uniform vec4 tev_combiner_buffer_color;\n";
out += "layout(location = " + std::to_string((int)Uniform::AlphaTestRef) + ") uniform int alphatest_ref;\n";
out += "layout(location = " + std::to_string((int)Uniform::TevConstColors) + ") uniform vec4 const_color[NUM_TEV_STAGES];\n";
out += "layout(location = " + std::to_string((int)Uniform::Texture0) + ") uniform sampler2D tex[3];\n";
out += "layout(location = " + std::to_string((int)Uniform::TevCombinerBufferColor) + ") uniform vec4 tev_combiner_buffer_color;\n";
out += "void main() {\n";
out += "vec4 combiner_buffer = tev_combiner_buffer_color;\n";