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author | Subv <subv2112@gmail.com> | 2015-07-26 03:13:11 +0200 |
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committer | bunnei <bunneidev@gmail.com> | 2015-10-22 03:51:23 +0200 |
commit | e3f4233cefff611e03a2031c6194a118d946a5d9 (patch) | |
tree | 4968035a8a556afb91737d5445a8433b4c1da05a /src/video_core/renderer_opengl/gl_shader_util.cpp | |
parent | Merge pull request #1207 from kemenaran/persist-citra-settings-in-qt (diff) | |
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Diffstat (limited to 'src/video_core/renderer_opengl/gl_shader_util.cpp')
-rw-r--r-- | src/video_core/renderer_opengl/gl_shader_util.cpp | 349 |
1 files changed, 349 insertions, 0 deletions
diff --git a/src/video_core/renderer_opengl/gl_shader_util.cpp b/src/video_core/renderer_opengl/gl_shader_util.cpp index 4cf246c06..ee32f6a31 100644 --- a/src/video_core/renderer_opengl/gl_shader_util.cpp +++ b/src/video_core/renderer_opengl/gl_shader_util.cpp @@ -2,6 +2,13 @@ // Licensed under GPLv2 or any later version // Refer to the license.txt file included. + +#include "gl_shader_util.h" +#include "gl_rasterizer.h" +#include "common/logging/log.h" + +#include "video_core/pica.h" + #include <algorithm> #include <vector> @@ -65,6 +72,13 @@ GLuint LoadShaders(const char* vertex_shader, const char* fragment_shader) { GLuint program_id = glCreateProgram(); glAttachShader(program_id, vertex_shader_id); glAttachShader(program_id, fragment_shader_id); + + glBindAttribLocation(program_id, Attributes::ATTRIBUTE_POSITION, "vert_position"); + glBindAttribLocation(program_id, Attributes::ATTRIBUTE_COLOR, "vert_color"); + glBindAttribLocation(program_id, Attributes::ATTRIBUTE_TEXCOORDS + 0, "vert_texcoords0"); + glBindAttribLocation(program_id, Attributes::ATTRIBUTE_TEXCOORDS + 1, "vert_texcoords1"); + glBindAttribLocation(program_id, Attributes::ATTRIBUTE_TEXCOORDS + 2, "vert_texcoords2"); + glLinkProgram(program_id); // Check the program @@ -88,3 +102,338 @@ GLuint LoadShaders(const char* vertex_shader, const char* fragment_shader) { } } + +namespace ShaderCache +{ + +static bool IsPassThroughTevStage(const Pica::Regs::TevStageConfig& stage) { + return (stage.color_op == Pica::Regs::TevStageConfig::Operation::Replace && + stage.alpha_op == Pica::Regs::TevStageConfig::Operation::Replace && + stage.color_source1 == Pica::Regs::TevStageConfig::Source::Previous && + stage.alpha_source1 == Pica::Regs::TevStageConfig::Source::Previous && + stage.color_modifier1 == Pica::Regs::TevStageConfig::ColorModifier::SourceColor && + stage.alpha_modifier1 == Pica::Regs::TevStageConfig::AlphaModifier::SourceAlpha && + stage.GetColorMultiplier() == 1 && + stage.GetAlphaMultiplier() == 1); +} + +void AppendSource(std::string& shader, Pica::Regs::TevStageConfig::Source source, const std::string& index_name) { + using Source = Pica::Regs::TevStageConfig::Source; + switch (source) { + case Source::PrimaryColor: + shader += "o[2]"; + break; + case Source::PrimaryFragmentColor: + // HACK: Until we implement fragment lighting, use primary_color + shader += "o[2]"; + break; + case Source::SecondaryFragmentColor: + // HACK: Until we implement fragment lighting, use zero + shader += "vec4(0.0, 0.0, 0.0, 0.0)"; + break; + case Source::Texture0: + shader += "texture(tex[0], o[3].xy)"; + break; + case Source::Texture1: + shader += "texture(tex[1], o[3].zw)"; + break; + case Source::Texture2: // TODO: Unverified + shader += "texture(tex[2], o[5].zw)"; + break; + case Source::PreviousBuffer: + shader += "g_combiner_buffer"; + break; + case Source::Constant: + shader += "const_color[" + index_name + "]"; + break; + case Source::Previous: + shader += "g_last_tex_env_out"; + break; + default: + shader += "vec4(0.0)"; + LOG_CRITICAL(Render_OpenGL, "Unknown source op %u", source); + break; + } +} + +void AppendColorModifier(std::string& shader, Pica::Regs::TevStageConfig::ColorModifier modifier, Pica::Regs::TevStageConfig::Source source, const std::string& index_name) { + using ColorModifier = Pica::Regs::TevStageConfig::ColorModifier; + switch (modifier) { + case ColorModifier::SourceColor: + AppendSource(shader, source, index_name); + shader += ".rgb"; + break; + case ColorModifier::OneMinusSourceColor: + shader += "vec3(1.0) - "; + AppendSource(shader, source, index_name); + shader += ".rgb"; + break; + case ColorModifier::SourceAlpha: + AppendSource(shader, source, index_name); + shader += ".aaa"; + break; + case ColorModifier::OneMinusSourceAlpha: + shader += "vec3(1.0) - "; + AppendSource(shader, source, index_name); + shader += ".aaa"; + break; + case ColorModifier::SourceRed: + AppendSource(shader, source, index_name); + shader += ".rrr"; + break; + case ColorModifier::OneMinusSourceRed: + shader += "vec3(1.0) - "; + AppendSource(shader, source, index_name); + shader += ".rrr"; + break; + case ColorModifier::SourceGreen: + AppendSource(shader, source, index_name); + shader += ".ggg"; + break; + case ColorModifier::OneMinusSourceGreen: + shader += "vec3(1.0) - "; + AppendSource(shader, source, index_name); + shader += ".ggg"; + break; + case ColorModifier::SourceBlue: + AppendSource(shader, source, index_name); + shader += ".bbb"; + break; + case ColorModifier::OneMinusSourceBlue: + shader += "vec3(1.0) - "; + AppendSource(shader, source, index_name); + shader += ".bbb"; + break; + default: + shader += "vec3(0.0)"; + LOG_CRITICAL(Render_OpenGL, "Unknown color modifier op %u", modifier); + break; + } +} + +void AppendAlphaModifier(std::string& shader, Pica::Regs::TevStageConfig::AlphaModifier modifier, Pica::Regs::TevStageConfig::Source source, const std::string& index_name) { + using AlphaModifier = Pica::Regs::TevStageConfig::AlphaModifier; + switch (modifier) { + case AlphaModifier::SourceAlpha: + AppendSource(shader, source, index_name); + shader += ".a"; + break; + case AlphaModifier::OneMinusSourceAlpha: + shader += "1.0 - "; + AppendSource(shader, source, index_name); + shader += ".a"; + break; + case AlphaModifier::SourceRed: + AppendSource(shader, source, index_name); + shader += ".r"; + break; + case AlphaModifier::OneMinusSourceRed: + shader += "1.0 - "; + AppendSource(shader, source, index_name); + shader += ".r"; + break; + case AlphaModifier::SourceGreen: + AppendSource(shader, source, index_name); + shader += ".g"; + break; + case AlphaModifier::OneMinusSourceGreen: + shader += "1.0 - "; + AppendSource(shader, source, index_name); + shader += ".g"; + break; + case AlphaModifier::SourceBlue: + AppendSource(shader, source, index_name); + shader += ".b"; + break; + case AlphaModifier::OneMinusSourceBlue: + shader += "1.0 - "; + AppendSource(shader, source, index_name); + shader += ".b"; + break; + default: + shader += "vec3(0.0)"; + LOG_CRITICAL(Render_OpenGL, "Unknown alpha modifier op %u", modifier); + break; + } +} + +void AppendColorCombiner(std::string& shader, Pica::Regs::TevStageConfig::Operation operation, const std::string& variable_name) { + using Operation = Pica::Regs::TevStageConfig::Operation; + + switch (operation) { + case Operation::Replace: + shader += variable_name + "[0]"; + break; + case Operation::Modulate: + shader += variable_name + "[0] * " + variable_name + "[1]"; + break; + case Operation::Add: + shader += "min(" + variable_name + "[0] + " + variable_name + "[1], 1.0)"; + break; + case Operation::AddSigned: + shader += "clamp(" + variable_name + "[0] + " + variable_name + "[1] - vec3(0.5), 0.0, 1.0)"; + break; + case Operation::Lerp: + shader += variable_name + "[0] * " + variable_name + "[2] + " + variable_name + "[1] * (vec3(1.0) - " + variable_name + "[2])"; + break; + case Operation::Subtract: + shader += "max(" + variable_name + "[0] - " + variable_name + "[1], 0.0)"; + break; + case Operation::MultiplyThenAdd: + shader += "min(" + variable_name + "[0] * " + variable_name + "[1] + " + variable_name + "[2], 1.0)"; + break; + case Operation::AddThenMultiply: + shader += "min(" + variable_name + "[0] + " + variable_name + "[1], 1.0) * " + variable_name + "[2]"; + break; + default: + shader += "0.0"; + LOG_CRITICAL(Render_OpenGL, "Unknown color comb op %u", operation); + break; + } +} + +void AppendAlphaCombiner(std::string& shader, Pica::Regs::TevStageConfig::Operation operation, const std::string& variable_name) { + using Operation = Pica::Regs::TevStageConfig::Operation; + switch (operation) { + case Operation::Replace: + shader += variable_name + "[0]"; + break; + case Operation::Modulate: + shader += variable_name + "[0] * " + variable_name + "[1]"; + break; + case Operation::Add: + shader += "min(" + variable_name + "[0] + " + variable_name + "[1], 1.0)"; + break; + case Operation::AddSigned: + shader += "clamp(" + variable_name + "[0] + " + variable_name + "[1] - 0.5, 0.0, 1.0)"; + break; + case Operation::Lerp: + shader += variable_name + "[0] * " + variable_name + "[2] + " + variable_name + "[1] * (1.0 - " + variable_name + "[2])"; + break; + case Operation::Subtract: + shader += "max(" + variable_name + "[0] - " + variable_name + "[1], 0.0)"; + break; + case Operation::MultiplyThenAdd: + shader += "min(" + variable_name + "[0] * " + variable_name + "[1] + " + variable_name + "[2], 1.0)"; + break; + case Operation::AddThenMultiply: + shader += "min(" + variable_name + "[0] + " + variable_name + "[1], 1.0) * " + variable_name + "[2]"; + break; + default: + shader += "0.0"; + LOG_CRITICAL(Render_OpenGL, "Unknown alpha combiner op %u", operation); + break; + } +} + +void AppendAlphaTestCondition(std::string& shader, Pica::Regs::CompareFunc func) { + using CompareFunc = Pica::Regs::CompareFunc; + switch (func) { + case CompareFunc::Never: + shader += "true"; + break; + case CompareFunc::Always: + shader += "false"; + break; + case CompareFunc::Equal: + shader += "g_last_tex_env_out.a != alphatest_ref"; + break; + case CompareFunc::NotEqual: + shader += "g_last_tex_env_out.a == alphatest_ref"; + break; + case CompareFunc::LessThan: + shader += "g_last_tex_env_out.a >= alphatest_ref"; + break; + case CompareFunc::LessThanOrEqual: + shader += "g_last_tex_env_out.a > alphatest_ref"; + break; + case CompareFunc::GreaterThan: + shader += "g_last_tex_env_out.a <= alphatest_ref"; + break; + case CompareFunc::GreaterThanOrEqual: + shader += "g_last_tex_env_out.a < alphatest_ref"; + break; + default: + shader += "false"; + LOG_CRITICAL(Render_OpenGL, "Unknown alpha test condition %u", func); + break; + } +} + +std::string GenerateFragmentShader(const ShaderCacheKey& config) { + std::string shader = R"( +#version 150 core + +#define NUM_VTX_ATTR 7 +#define NUM_TEV_STAGES 6 + +in vec4 o[NUM_VTX_ATTR]; +out vec4 color; + +uniform float alphatest_ref; +uniform vec4 const_color[NUM_TEV_STAGES]; +uniform sampler2D tex[3]; + +uniform vec4 tev_combiner_buffer_color; + +void main(void) { + vec4 g_combiner_buffer = tev_combiner_buffer_color; + 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; + } + + 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); + + 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.TevStageUpdatesCombinerBufferColor(tev_stage_index)) + shader += "g_combiner_buffer.rgb = g_last_tex_env_out.rgb;\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; +} +} |