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Merge pull request #2671 from wwylele/dot3-rgba
rasterizer: implement combiner operation 7 (Dot3_RGBA)
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commit
ea53d6085a
@ -199,7 +199,7 @@ struct TexturingRegs {
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Lerp = 4,
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Subtract = 5,
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Dot3_RGB = 6,
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Dot3_RGBA = 7,
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MultiplyThenAdd = 8,
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AddThenMultiply = 9,
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};
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@ -306,8 +306,6 @@ static void AppendColorCombiner(std::string& out, TevStageConfig::Operation oper
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out += variable_name + "[0] + " + variable_name + "[1] - vec3(0.5)";
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break;
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case Operation::Lerp:
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// TODO(bunnei): Verify if HW actually does this per-component, otherwise we can just use
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// builtin lerp
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out += variable_name + "[0] * " + variable_name + "[2] + " + variable_name +
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"[1] * (vec3(1.0) - " + variable_name + "[2])";
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break;
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@ -322,6 +320,7 @@ static void AppendColorCombiner(std::string& out, TevStageConfig::Operation oper
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variable_name + "[2]";
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break;
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case Operation::Dot3_RGB:
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case Operation::Dot3_RGBA:
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out += "vec3(dot(" + variable_name + "[0] - vec3(0.5), " + variable_name +
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"[1] - vec3(0.5)) * 4.0)";
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break;
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@ -421,17 +420,25 @@ static void WriteTevStage(std::string& out, const PicaShaderConfig& config, unsi
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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](";
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AppendAlphaModifier(out, config, stage.alpha_modifier1, stage.alpha_source1, index_name);
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out += ", ";
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AppendAlphaModifier(out, config, stage.alpha_modifier2, stage.alpha_source2, index_name);
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out += ", ";
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AppendAlphaModifier(out, config, stage.alpha_modifier3, stage.alpha_source3, index_name);
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out += ");\n";
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if (stage.color_op == TevStageConfig::Operation::Dot3_RGBA) {
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// result of Dot3_RGBA operation is also placed to the alpha component
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out += "float alpha_output_" + index_name + " = color_output_" + index_name + "[0];\n";
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} else {
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out += "float alpha_results_" + index_name + "[3] = float[3](";
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AppendAlphaModifier(out, config, stage.alpha_modifier1, stage.alpha_source1,
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index_name);
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out += ", ";
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AppendAlphaModifier(out, config, stage.alpha_modifier2, stage.alpha_source2,
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index_name);
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out += ", ";
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AppendAlphaModifier(out, config, stage.alpha_modifier3, stage.alpha_source3,
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index_name);
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out += ");\n";
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out += "float alpha_output_" + index_name + " = ";
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AppendAlphaCombiner(out, stage.alpha_op, "alpha_results_" + index_name);
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out += ";\n";
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out += "float alpha_output_" + index_name + " = ";
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AppendAlphaCombiner(out, stage.alpha_op, "alpha_results_" + index_name);
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out += ";\n";
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}
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out += "last_tex_env_out = vec4("
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"clamp(color_output_" +
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@ -403,13 +403,22 @@ static void ProcessTriangleInternal(const Vertex& v0, const Vertex& v1, const Ve
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};
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auto color_output = ColorCombine(tev_stage.color_op, color_result);
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// alpha combiner
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std::array<u8, 3> alpha_result = {{
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GetAlphaModifier(tev_stage.alpha_modifier1, GetSource(tev_stage.alpha_source1)),
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GetAlphaModifier(tev_stage.alpha_modifier2, GetSource(tev_stage.alpha_source2)),
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GetAlphaModifier(tev_stage.alpha_modifier3, GetSource(tev_stage.alpha_source3)),
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}};
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auto alpha_output = AlphaCombine(tev_stage.alpha_op, alpha_result);
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u8 alpha_output;
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if (tev_stage.color_op == TexturingRegs::TevStageConfig::Operation::Dot3_RGBA) {
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// result of Dot3_RGBA operation is also placed to the alpha component
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alpha_output = color_output.x;
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} else {
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// alpha combiner
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std::array<u8, 3> alpha_result = {{
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GetAlphaModifier(tev_stage.alpha_modifier1,
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GetSource(tev_stage.alpha_source1)),
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GetAlphaModifier(tev_stage.alpha_modifier2,
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GetSource(tev_stage.alpha_source2)),
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GetAlphaModifier(tev_stage.alpha_modifier3,
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GetSource(tev_stage.alpha_source3)),
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}};
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alpha_output = AlphaCombine(tev_stage.alpha_op, alpha_result);
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}
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combiner_output[0] =
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std::min((unsigned)255, color_output.r() * tev_stage.GetColorMultiplier());
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@ -169,7 +169,8 @@ Math::Vec3<u8> ColorCombine(TevStageConfig::Operation op, const Math::Vec3<u8> i
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result = (result * input[2].Cast<int>()) / 255;
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return result.Cast<u8>();
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}
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case Operation::Dot3_RGB: {
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case Operation::Dot3_RGB:
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case Operation::Dot3_RGBA: {
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// Not fully accurate. Worst case scenario seems to yield a +/-3 error. Some HW results
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// indicate that the per-component computation can't have a higher precision than 1/256,
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// while dot3_rgb((0x80,g0,b0), (0x7F,g1,b1)) and dot3_rgb((0x80,g0,b0), (0x80,g1,b1)) give
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