gl_shader_gen: Various cleanups + moved TEV stage generation to its own function.
This commit is contained in:
bunnei
parent
c86b9d4242
commit
a74774257e
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@ -6,268 +6,313 @@
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#include "video_core/renderer_opengl/gl_rasterizer.h"
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#include "video_core/renderer_opengl/gl_shader_gen.h"
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using Pica::Regs;
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using TevStageConfig = Regs::TevStageConfig;
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namespace GLShader {
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static bool IsPassThroughTevStage(const Pica::Regs::TevStageConfig& stage) {
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return (stage.color_op == Pica::Regs::TevStageConfig::Operation::Replace &&
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stage.alpha_op == Pica::Regs::TevStageConfig::Operation::Replace &&
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stage.color_source1 == Pica::Regs::TevStageConfig::Source::Previous &&
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stage.alpha_source1 == Pica::Regs::TevStageConfig::Source::Previous &&
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stage.color_modifier1 == Pica::Regs::TevStageConfig::ColorModifier::SourceColor &&
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stage.alpha_modifier1 == Pica::Regs::TevStageConfig::AlphaModifier::SourceAlpha &&
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static bool IsPassThroughTevStage(const TevStageConfig& stage) {
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return (stage.color_op == TevStageConfig::Operation::Replace &&
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stage.alpha_op == TevStageConfig::Operation::Replace &&
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stage.color_source1 == TevStageConfig::Source::Previous &&
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stage.alpha_source1 == TevStageConfig::Source::Previous &&
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stage.color_modifier1 == TevStageConfig::ColorModifier::SourceColor &&
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stage.alpha_modifier1 == TevStageConfig::AlphaModifier::SourceAlpha &&
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stage.GetColorMultiplier() == 1 &&
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stage.GetAlphaMultiplier() == 1);
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}
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static void AppendSource(std::string& shader, Pica::Regs::TevStageConfig::Source source, const std::string& index_name) {
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using Source = Pica::Regs::TevStageConfig::Source;
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static void AppendSource(std::string& out, TevStageConfig::Source source,
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const std::string& index_name) {
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using Source = TevStageConfig::Source;
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switch (source) {
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case Source::PrimaryColor:
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shader += "o[2]";
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out += "o[2]";
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break;
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case Source::PrimaryFragmentColor:
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// HACK: Until we implement fragment lighting, use primary_color
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shader += "o[2]";
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out += "o[2]";
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break;
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case Source::SecondaryFragmentColor:
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// HACK: Until we implement fragment lighting, use zero
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shader += "vec4(0.0, 0.0, 0.0, 0.0)";
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out += "vec4(0.0, 0.0, 0.0, 0.0)";
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break;
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case Source::Texture0:
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shader += "texture(tex[0], o[3].xy)";
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out += "texture(tex[0], o[3].xy)";
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break;
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case Source::Texture1:
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shader += "texture(tex[1], o[3].zw)";
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out += "texture(tex[1], o[3].zw)";
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break;
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case Source::Texture2: // TODO: Unverified
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shader += "texture(tex[2], o[5].zw)";
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out += "texture(tex[2], o[5].zw)";
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break;
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case Source::PreviousBuffer:
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shader += "g_combiner_buffer";
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out += "g_combiner_buffer";
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break;
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case Source::Constant:
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shader += "const_color[" + index_name + "]";
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out += "const_color[" + index_name + "]";
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break;
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case Source::Previous:
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shader += "g_last_tex_env_out";
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out += "g_last_tex_env_out";
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break;
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default:
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shader += "vec4(0.0)";
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out += "vec4(0.0)";
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LOG_CRITICAL(Render_OpenGL, "Unknown source op %u", source);
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break;
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}
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}
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static void AppendColorModifier(std::string& shader, Pica::Regs::TevStageConfig::ColorModifier modifier,
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Pica::Regs::TevStageConfig::Source source, const std::string& index_name) {
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using ColorModifier = Pica::Regs::TevStageConfig::ColorModifier;
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static void AppendColorModifier(std::string& out, TevStageConfig::ColorModifier modifier,
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TevStageConfig::Source source, const std::string& index_name) {
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using ColorModifier = TevStageConfig::ColorModifier;
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switch (modifier) {
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case ColorModifier::SourceColor:
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AppendSource(shader, source, index_name);
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shader += ".rgb";
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AppendSource(out, source, index_name);
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out += ".rgb";
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break;
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case ColorModifier::OneMinusSourceColor:
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shader += "vec3(1.0) - ";
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AppendSource(shader, source, index_name);
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shader += ".rgb";
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out += "vec3(1.0) - ";
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AppendSource(out, source, index_name);
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out += ".rgb";
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break;
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case ColorModifier::SourceAlpha:
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AppendSource(shader, source, index_name);
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shader += ".aaa";
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AppendSource(out, source, index_name);
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out += ".aaa";
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break;
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case ColorModifier::OneMinusSourceAlpha:
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shader += "vec3(1.0) - ";
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AppendSource(shader, source, index_name);
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shader += ".aaa";
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out += "vec3(1.0) - ";
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AppendSource(out, source, index_name);
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out += ".aaa";
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break;
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case ColorModifier::SourceRed:
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AppendSource(shader, source, index_name);
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shader += ".rrr";
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AppendSource(out, source, index_name);
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out += ".rrr";
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break;
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case ColorModifier::OneMinusSourceRed:
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shader += "vec3(1.0) - ";
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AppendSource(shader, source, index_name);
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shader += ".rrr";
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out += "vec3(1.0) - ";
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AppendSource(out, source, index_name);
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out += ".rrr";
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break;
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case ColorModifier::SourceGreen:
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AppendSource(shader, source, index_name);
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shader += ".ggg";
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AppendSource(out, source, index_name);
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out += ".ggg";
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break;
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case ColorModifier::OneMinusSourceGreen:
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shader += "vec3(1.0) - ";
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AppendSource(shader, source, index_name);
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shader += ".ggg";
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out += "vec3(1.0) - ";
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AppendSource(out, source, index_name);
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out += ".ggg";
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break;
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case ColorModifier::SourceBlue:
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AppendSource(shader, source, index_name);
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shader += ".bbb";
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AppendSource(out, source, index_name);
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out += ".bbb";
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break;
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case ColorModifier::OneMinusSourceBlue:
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shader += "vec3(1.0) - ";
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AppendSource(shader, source, index_name);
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shader += ".bbb";
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out += "vec3(1.0) - ";
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AppendSource(out, source, index_name);
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out += ".bbb";
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break;
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default:
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shader += "vec3(0.0)";
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out += "vec3(0.0)";
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LOG_CRITICAL(Render_OpenGL, "Unknown color modifier op %u", modifier);
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break;
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}
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}
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static void AppendAlphaModifier(std::string& shader, Pica::Regs::TevStageConfig::AlphaModifier modifier,
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Pica::Regs::TevStageConfig::Source source, const std::string& index_name) {
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using AlphaModifier = Pica::Regs::TevStageConfig::AlphaModifier;
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static void AppendAlphaModifier(std::string& out, TevStageConfig::AlphaModifier modifier,
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TevStageConfig::Source source, const std::string& index_name) {
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using AlphaModifier = TevStageConfig::AlphaModifier;
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switch (modifier) {
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case AlphaModifier::SourceAlpha:
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AppendSource(shader, source, index_name);
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shader += ".a";
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AppendSource(out, source, index_name);
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out += ".a";
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break;
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case AlphaModifier::OneMinusSourceAlpha:
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shader += "1.0 - ";
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AppendSource(shader, source, index_name);
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shader += ".a";
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out += "1.0 - ";
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AppendSource(out, source, index_name);
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out += ".a";
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break;
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case AlphaModifier::SourceRed:
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AppendSource(shader, source, index_name);
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shader += ".r";
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AppendSource(out, source, index_name);
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out += ".r";
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break;
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case AlphaModifier::OneMinusSourceRed:
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shader += "1.0 - ";
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AppendSource(shader, source, index_name);
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shader += ".r";
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out += "1.0 - ";
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AppendSource(out, source, index_name);
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out += ".r";
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break;
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case AlphaModifier::SourceGreen:
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AppendSource(shader, source, index_name);
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shader += ".g";
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AppendSource(out, source, index_name);
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out += ".g";
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break;
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case AlphaModifier::OneMinusSourceGreen:
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shader += "1.0 - ";
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AppendSource(shader, source, index_name);
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shader += ".g";
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out += "1.0 - ";
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AppendSource(out, source, index_name);
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out += ".g";
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break;
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case AlphaModifier::SourceBlue:
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AppendSource(shader, source, index_name);
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shader += ".b";
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AppendSource(out, source, index_name);
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out += ".b";
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break;
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case AlphaModifier::OneMinusSourceBlue:
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shader += "1.0 - ";
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AppendSource(shader, source, index_name);
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shader += ".b";
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out += "1.0 - ";
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AppendSource(out, source, index_name);
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out += ".b";
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break;
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default:
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shader += "vec3(0.0)";
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out += "vec3(0.0)";
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LOG_CRITICAL(Render_OpenGL, "Unknown alpha modifier op %u", modifier);
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break;
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}
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}
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static void AppendColorCombiner(std::string& shader, Pica::Regs::TevStageConfig::Operation operation,
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static void AppendColorCombiner(std::string& out, TevStageConfig::Operation operation,
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const std::string& variable_name) {
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using Operation = Pica::Regs::TevStageConfig::Operation;
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using Operation = TevStageConfig::Operation;
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switch (operation) {
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case Operation::Replace:
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shader += variable_name + "[0]";
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out += variable_name + "[0]";
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break;
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case Operation::Modulate:
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shader += variable_name + "[0] * " + variable_name + "[1]";
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out += variable_name + "[0] * " + variable_name + "[1]";
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break;
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case Operation::Add:
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shader += "min(" + variable_name + "[0] + " + variable_name + "[1], vec3(1.0))";
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out += "min(" + variable_name + "[0] + " + variable_name + "[1], vec3(1.0))";
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break;
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case Operation::AddSigned:
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shader += "clamp(" + variable_name + "[0] + " + variable_name + "[1] - vec3(0.5), vec3(0.0), vec3(1.0))";
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out += "clamp(" + variable_name + "[0] + " + variable_name + "[1] - vec3(0.5), vec3(0.0), vec3(1.0))";
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break;
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case Operation::Lerp:
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shader += variable_name + "[0] * " + variable_name + "[2] + " + variable_name + "[1] * (vec3(1.0) - " + variable_name + "[2])";
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out += variable_name + "[0] * " + variable_name + "[2] + " + variable_name + "[1] * (vec3(1.0) - " + variable_name + "[2])";
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break;
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case Operation::Subtract:
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shader += "max(" + variable_name + "[0] - " + variable_name + "[1], vec3(0.0))";
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out += "max(" + variable_name + "[0] - " + variable_name + "[1], vec3(0.0))";
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break;
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case Operation::MultiplyThenAdd:
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shader += "min(" + variable_name + "[0] * " + variable_name + "[1] + " + variable_name + "[2], vec3(1.0))";
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out += "min(" + variable_name + "[0] * " + variable_name + "[1] + " + variable_name + "[2], vec3(1.0))";
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break;
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case Operation::AddThenMultiply:
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shader += "min(" + variable_name + "[0] + " + variable_name + "[1], vec3(1.0)) * " + variable_name + "[2]";
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out += "min(" + variable_name + "[0] + " + variable_name + "[1], vec3(1.0)) * " + variable_name + "[2]";
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break;
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default:
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shader += "vec3(0.0)";
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LOG_CRITICAL(Render_OpenGL, "Unknown color comb op %u", operation);
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out += "vec3(0.0)";
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LOG_CRITICAL(Render_OpenGL, "Unknown color combiner operation: %u", operation);
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break;
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}
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}
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static void AppendAlphaCombiner(std::string& shader, Pica::Regs::TevStageConfig::Operation operation,
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static void AppendAlphaCombiner(std::string& out, TevStageConfig::Operation operation,
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const std::string& variable_name) {
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using Operation = Pica::Regs::TevStageConfig::Operation;
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using Operation = TevStageConfig::Operation;
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switch (operation) {
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case Operation::Replace:
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shader += variable_name + "[0]";
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out += variable_name + "[0]";
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break;
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case Operation::Modulate:
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shader += variable_name + "[0] * " + variable_name + "[1]";
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out += variable_name + "[0] * " + variable_name + "[1]";
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break;
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case Operation::Add:
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shader += "min(" + variable_name + "[0] + " + variable_name + "[1], 1.0)";
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out += "min(" + variable_name + "[0] + " + variable_name + "[1], 1.0)";
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break;
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case Operation::AddSigned:
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shader += "clamp(" + variable_name + "[0] + " + variable_name + "[1] - 0.5, 0.0, 1.0)";
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out += "clamp(" + variable_name + "[0] + " + variable_name + "[1] - 0.5, 0.0, 1.0)";
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break;
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case Operation::Lerp:
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shader += variable_name + "[0] * " + variable_name + "[2] + " + variable_name + "[1] * (1.0 - " + variable_name + "[2])";
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out += variable_name + "[0] * " + variable_name + "[2] + " + variable_name + "[1] * (1.0 - " + variable_name + "[2])";
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break;
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case Operation::Subtract:
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shader += "max(" + variable_name + "[0] - " + variable_name + "[1], 0.0)";
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out += "max(" + variable_name + "[0] - " + variable_name + "[1], 0.0)";
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break;
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case Operation::MultiplyThenAdd:
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shader += "min(" + variable_name + "[0] * " + variable_name + "[1] + " + variable_name + "[2], 1.0)";
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out += "min(" + variable_name + "[0] * " + variable_name + "[1] + " + variable_name + "[2], 1.0)";
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break;
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case Operation::AddThenMultiply:
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shader += "min(" + variable_name + "[0] + " + variable_name + "[1], 1.0) * " + variable_name + "[2]";
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out += "min(" + variable_name + "[0] + " + variable_name + "[1], 1.0) * " + variable_name + "[2]";
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break;
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default:
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shader += "0.0";
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LOG_CRITICAL(Render_OpenGL, "Unknown alpha combiner op %u", operation);
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out += "0.0";
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LOG_CRITICAL(Render_OpenGL, "Unknown alpha combiner operation: %u", operation);
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break;
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}
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}
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static void AppendAlphaTestCondition(std::string& shader, Pica::Regs::CompareFunc func) {
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using CompareFunc = Pica::Regs::CompareFunc;
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static void AppendAlphaTestCondition(std::string& out, Regs::CompareFunc func) {
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using CompareFunc = Regs::CompareFunc;
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switch (func) {
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case CompareFunc::Never:
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shader += "true";
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out += "true";
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break;
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case CompareFunc::Always:
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shader += "false";
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out += "false";
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break;
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case CompareFunc::Equal:
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shader += "int(g_last_tex_env_out.a * 255.0f) != alphatest_ref";
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out += "int(g_last_tex_env_out.a * 255.0f) != alphatest_ref";
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break;
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case CompareFunc::NotEqual:
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shader += "int(g_last_tex_env_out.a * 255.0f) == alphatest_ref";
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out += "int(g_last_tex_env_out.a * 255.0f) == alphatest_ref";
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break;
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case CompareFunc::LessThan:
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shader += "int(g_last_tex_env_out.a * 255.0f) >= alphatest_ref";
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out += "int(g_last_tex_env_out.a * 255.0f) >= alphatest_ref";
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break;
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case CompareFunc::LessThanOrEqual:
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shader += "int(g_last_tex_env_out.a * 255.0f) > alphatest_ref";
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out += "int(g_last_tex_env_out.a * 255.0f) > alphatest_ref";
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break;
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case CompareFunc::GreaterThan:
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shader += "int(g_last_tex_env_out.a * 255.0f) <= alphatest_ref";
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out += "int(g_last_tex_env_out.a * 255.0f) <= alphatest_ref";
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break;
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case CompareFunc::GreaterThanOrEqual:
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shader += "int(g_last_tex_env_out.a * 255.0f) < alphatest_ref";
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out += "int(g_last_tex_env_out.a * 255.0f) < alphatest_ref";
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break;
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default:
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shader += "false";
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out += "false";
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LOG_CRITICAL(Render_OpenGL, "Unknown alpha test condition %u", func);
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break;
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}
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}
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static void WriteTevStage(std::string& out, const ShaderCacheKey& config, unsigned index) {
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auto& stage = config.tev_stages[index];
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if (!IsPassThroughTevStage(stage)) {
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std::string index_name = std::to_string(index);
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out += "vec3 color_results_" + index_name + "[3] = vec3[3](";
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AppendColorModifier(out, stage.color_modifier1, stage.color_source1, index_name);
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out += ", ";
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AppendColorModifier(out, stage.color_modifier2, stage.color_source2, index_name);
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out += ", ";
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AppendColorModifier(out, stage.color_modifier3, stage.color_source3, index_name);
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out += ");\n";
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out += "vec3 color_output_" + index_name + " = ";
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AppendColorCombiner(out, stage.color_op, "color_results_" + index_name);
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out += ";\n";
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out += "float alpha_results_" + index_name + "[3] = float[3](";
|
||||
AppendAlphaModifier(out, stage.alpha_modifier1, stage.alpha_source1, index_name);
|
||||
out += ", ";
|
||||
AppendAlphaModifier(out, stage.alpha_modifier2, stage.alpha_source2, index_name);
|
||||
out += ", ";
|
||||
AppendAlphaModifier(out, stage.alpha_modifier3, stage.alpha_source3, index_name);
|
||||
out += ");\n";
|
||||
|
||||
out += "float alpha_output_" + index_name + " = ";
|
||||
AppendAlphaCombiner(out, stage.alpha_op, "alpha_results_" + index_name);
|
||||
out += ";\n";
|
||||
|
||||
out += "g_last_tex_env_out = vec4(min(color_output_" + index_name + " * " +
|
||||
std::to_string(stage.GetColorMultiplier()) + ".0, 1.0), min(alpha_output_" + index_name + " * " +
|
||||
std::to_string(stage.GetAlphaMultiplier()) + ".0, 1.0));\n";
|
||||
}
|
||||
|
||||
if (config.TevStageUpdatesCombinerBufferColor(index))
|
||||
out += "g_combiner_buffer.rgb = g_last_tex_env_out.rgb;\n";
|
||||
|
||||
if (config.TevStageUpdatesCombinerBufferAlpha(index))
|
||||
out += "g_combiner_buffer.a = g_last_tex_env_out.a;\n";
|
||||
}
|
||||
|
||||
std::string GenerateFragmentShader(const ShaderCacheKey& config) {
|
||||
std::string shader = R"(
|
||||
std::string out = R"(
|
||||
#version 150 core
|
||||
|
||||
#define NUM_VTX_ATTR 7
|
||||
|
|
@ -288,63 +333,27 @@ vec4 g_last_tex_env_out = vec4(0.0, 0.0, 0.0, 0.0);
|
|||
)";
|
||||
|
||||
// Do not do any sort of processing if it's obvious we're not going to pass the alpha test
|
||||
if (config.alpha_test_func == Pica::Regs::CompareFunc::Never) {
|
||||
shader += "discard;";
|
||||
return shader;
|
||||
if (config.alpha_test_func == Regs::CompareFunc::Never) {
|
||||
out += "discard;";
|
||||
return out;
|
||||
}
|
||||
|
||||
auto& tev_stages = config.tev_stages;
|
||||
for (unsigned tev_stage_index = 0; tev_stage_index < tev_stages.size(); ++tev_stage_index) {
|
||||
auto& tev_stage = tev_stages[tev_stage_index];
|
||||
if (!IsPassThroughTevStage(tev_stage)) {
|
||||
std::string index_name = std::to_string(tev_stage_index);
|
||||
for (std::size_t index = 0; index < config.tev_stages.size(); ++index)
|
||||
WriteTevStage(out, config, (unsigned)index);
|
||||
|
||||
shader += "vec3 color_results_" + index_name + "[3] = vec3[3](";
|
||||
AppendColorModifier(shader, tev_stage.color_modifier1, tev_stage.color_source1, index_name);
|
||||
shader += ", ";
|
||||
AppendColorModifier(shader, tev_stage.color_modifier2, tev_stage.color_source2, index_name);
|
||||
shader += ", ";
|
||||
AppendColorModifier(shader, tev_stage.color_modifier3, tev_stage.color_source3, index_name);
|
||||
shader += ");\n";
|
||||
|
||||
shader += "vec3 color_output_" + index_name + " = ";
|
||||
AppendColorCombiner(shader, tev_stage.color_op, "color_results_" + index_name);
|
||||
shader += ";\n";
|
||||
|
||||
shader += "float alpha_results_" + index_name + "[3] = float[3](";
|
||||
AppendAlphaModifier(shader, tev_stage.alpha_modifier1, tev_stage.alpha_source1, index_name);
|
||||
shader += ", ";
|
||||
AppendAlphaModifier(shader, tev_stage.alpha_modifier2, tev_stage.alpha_source2, index_name);
|
||||
shader += ", ";
|
||||
AppendAlphaModifier(shader, tev_stage.alpha_modifier3, tev_stage.alpha_source3, index_name);
|
||||
shader += ");\n";
|
||||
|
||||
shader += "float alpha_output_" + index_name + " = ";
|
||||
AppendAlphaCombiner(shader, tev_stage.alpha_op, "alpha_results_" + index_name);
|
||||
shader += ";\n";
|
||||
|
||||
shader += "g_last_tex_env_out = vec4(min(color_output_" + index_name + " * " + std::to_string(tev_stage.GetColorMultiplier()) + ".0, 1.0), min(alpha_output_" + index_name + " * " + std::to_string(tev_stage.GetAlphaMultiplier()) + ".0, 1.0));\n";
|
||||
if (config.alpha_test_func != Regs::CompareFunc::Always) {
|
||||
out += "if (";
|
||||
AppendAlphaTestCondition(out, config.alpha_test_func);
|
||||
out += ") {\n discard;\n }\n";
|
||||
}
|
||||
|
||||
if (config.TevStageUpdatesCombinerBufferColor(tev_stage_index))
|
||||
shader += "g_combiner_buffer.rgb = g_last_tex_env_out.rgb;\n";
|
||||
out += "color = g_last_tex_env_out;\n}";
|
||||
|
||||
if (config.TevStageUpdatesCombinerBufferAlpha(tev_stage_index))
|
||||
shader += "g_combiner_buffer.a = g_last_tex_env_out.a;\n";
|
||||
}
|
||||
|
||||
if (config.alpha_test_func != Pica::Regs::CompareFunc::Always) {
|
||||
shader += "if (";
|
||||
AppendAlphaTestCondition(shader, config.alpha_test_func);
|
||||
shader += ") {\n discard;\n }\n";
|
||||
}
|
||||
|
||||
shader += "color = g_last_tex_env_out;\n}";
|
||||
return shader;
|
||||
return out;
|
||||
}
|
||||
|
||||
std::string GenerateVertexShader() {
|
||||
static const std::string shader_str = R"(
|
||||
static const std::string out = R"(
|
||||
#version 150 core
|
||||
|
||||
#define NUM_VTX_ATTR 7
|
||||
|
|
@ -365,7 +374,7 @@ void main() {
|
|||
gl_Position = vec4(vert_position.x, -vert_position.y, -vert_position.z, vert_position.w);
|
||||
}
|
||||
)";
|
||||
return shader_str;
|
||||
return out;
|
||||
}
|
||||
|
||||
} // namespace GLShaderGen
|
||||
} // namespace GLShader
|
||||
|
|
|
|||
Reference in New Issue