diff options
Diffstat (limited to 'src/video_core/renderer_opengl/gl_shader_gen.cpp')
-rw-r--r-- | src/video_core/renderer_opengl/gl_shader_gen.cpp | 110 |
1 files changed, 59 insertions, 51 deletions
diff --git a/src/video_core/renderer_opengl/gl_shader_gen.cpp b/src/video_core/renderer_opengl/gl_shader_gen.cpp index 540cbb9d0..0c7c4dd5c 100644 --- a/src/video_core/renderer_opengl/gl_shader_gen.cpp +++ b/src/video_core/renderer_opengl/gl_shader_gen.cpp @@ -562,9 +562,9 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) { out += "vec3 normal = quaternion_rotate(normalized_normquat, surface_normal);\n"; out += "vec3 tangent = quaternion_rotate(normalized_normquat, surface_tangent);\n"; - // Gets the index into the specified lookup table for specular lighting - auto GetLutIndex = [&lighting](unsigned light_num, LightingRegs::LightingLutInput input, - bool abs) { + // Samples the specified lookup table for specular lighting + auto GetLutValue = [&lighting](LightingRegs::LightingSampler sampler, unsigned light_num, + LightingRegs::LightingLutInput input, bool abs) { std::string index; switch (input) { case LightingRegs::LightingLutInput::NH: @@ -610,22 +610,18 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) { break; } + std::string sampler_string = std::to_string(static_cast<unsigned>(sampler)); + if (abs) { // LUT index is in the range of (0.0, 1.0) index = lighting.light[light_num].two_sided_diffuse ? "abs(" + index + ")" : "max(" + index + ", 0.0)"; + return "LookupLightingLUTUnsigned(" + sampler_string + ", " + index + ")"; } else { // LUT index is in the range of (-1.0, 1.0) - index = "((" + index + " < 0) ? " + index + " + 2.0 : " + index + ") / 2.0"; + return "LookupLightingLUTSigned(" + sampler_string + ", " + index + ")"; } - return "(OFFSET_256 + SCALE_256 * clamp(" + index + ", 0.0, 1.0))"; - }; - - // Gets the lighting lookup table value given the specified sampler and index - auto GetLutValue = [](LightingRegs::LightingSampler sampler, std::string lut_index) { - return std::string("texture(lut[" + std::to_string((unsigned)sampler / 4) + "], " + - lut_index + ")[" + std::to_string((unsigned)sampler & 3) + "]"); }; // Write the code to emulate each enabled light @@ -653,21 +649,21 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) { if (light_config.spot_atten_enable && LightingRegs::IsLightingSamplerSupported( lighting.config, LightingRegs::LightingSampler::SpotlightAttenuation)) { - std::string index = - GetLutIndex(light_config.num, lighting.lut_sp.type, lighting.lut_sp.abs_input); - auto sampler = LightingRegs::SpotlightAttenuationSampler(light_config.num); - spot_atten = "(" + std::to_string(lighting.lut_sp.scale) + " * " + - GetLutValue(sampler, index) + ")"; + std::string value = + GetLutValue(LightingRegs::SpotlightAttenuationSampler(light_config.num), + light_config.num, lighting.lut_sp.type, lighting.lut_sp.abs_input); + spot_atten = "(" + std::to_string(lighting.lut_sp.scale) + " * " + value + ")"; } // If enabled, compute distance attenuation value std::string dist_atten = "1.0"; if (light_config.dist_atten_enable) { - std::string index = "(" + light_src + ".dist_atten_scale * length(-view - " + - light_src + ".position) + " + light_src + ".dist_atten_bias)"; - index = "(OFFSET_256 + SCALE_256 * clamp(" + index + ", 0.0, 1.0))"; + std::string index = "clamp(" + light_src + ".dist_atten_scale * length(-view - " + + light_src + ".position) + " + light_src + + ".dist_atten_bias, 0.0, 1.0)"; auto sampler = LightingRegs::DistanceAttenuationSampler(light_config.num); - dist_atten = GetLutValue(sampler, index); + dist_atten = "LookupLightingLUTUnsigned(" + + std::to_string(static_cast<unsigned>(sampler)) + "," + index + ")"; } // If enabled, clamp specular component if lighting result is negative @@ -686,10 +682,10 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) { LightingRegs::IsLightingSamplerSupported( lighting.config, LightingRegs::LightingSampler::Distribution0)) { // Lookup specular "distribution 0" LUT value - std::string index = - GetLutIndex(light_config.num, lighting.lut_d0.type, lighting.lut_d0.abs_input); - d0_lut_value = "(" + std::to_string(lighting.lut_d0.scale) + " * " + - GetLutValue(LightingRegs::LightingSampler::Distribution0, index) + ")"; + std::string value = + GetLutValue(LightingRegs::LightingSampler::Distribution0, light_config.num, + lighting.lut_d0.type, lighting.lut_d0.abs_input); + d0_lut_value = "(" + std::to_string(lighting.lut_d0.scale) + " * " + value + ")"; } std::string specular_0 = "(" + d0_lut_value + " * " + light_src + ".specular_0)"; if (light_config.geometric_factor_0) { @@ -700,10 +696,10 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) { if (lighting.lut_rr.enable && LightingRegs::IsLightingSamplerSupported(lighting.config, LightingRegs::LightingSampler::ReflectRed)) { - std::string index = - GetLutIndex(light_config.num, lighting.lut_rr.type, lighting.lut_rr.abs_input); - std::string value = "(" + std::to_string(lighting.lut_rr.scale) + " * " + - GetLutValue(LightingRegs::LightingSampler::ReflectRed, index) + ")"; + std::string value = + GetLutValue(LightingRegs::LightingSampler::ReflectRed, light_config.num, + lighting.lut_rr.type, lighting.lut_rr.abs_input); + value = "(" + std::to_string(lighting.lut_rr.scale) + " * " + value + ")"; out += "refl_value.r = " + value + ";\n"; } else { out += "refl_value.r = 1.0;\n"; @@ -713,11 +709,10 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) { if (lighting.lut_rg.enable && LightingRegs::IsLightingSamplerSupported(lighting.config, LightingRegs::LightingSampler::ReflectGreen)) { - std::string index = - GetLutIndex(light_config.num, lighting.lut_rg.type, lighting.lut_rg.abs_input); - std::string value = "(" + std::to_string(lighting.lut_rg.scale) + " * " + - GetLutValue(LightingRegs::LightingSampler::ReflectGreen, index) + - ")"; + std::string value = + GetLutValue(LightingRegs::LightingSampler::ReflectGreen, light_config.num, + lighting.lut_rg.type, lighting.lut_rg.abs_input); + value = "(" + std::to_string(lighting.lut_rg.scale) + " * " + value + ")"; out += "refl_value.g = " + value + ";\n"; } else { out += "refl_value.g = refl_value.r;\n"; @@ -727,11 +722,10 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) { if (lighting.lut_rb.enable && LightingRegs::IsLightingSamplerSupported(lighting.config, LightingRegs::LightingSampler::ReflectBlue)) { - std::string index = - GetLutIndex(light_config.num, lighting.lut_rb.type, lighting.lut_rb.abs_input); - std::string value = "(" + std::to_string(lighting.lut_rb.scale) + " * " + - GetLutValue(LightingRegs::LightingSampler::ReflectBlue, index) + - ")"; + std::string value = + GetLutValue(LightingRegs::LightingSampler::ReflectBlue, light_config.num, + lighting.lut_rb.type, lighting.lut_rb.abs_input); + value = "(" + std::to_string(lighting.lut_rb.scale) + " * " + value + ")"; out += "refl_value.b = " + value + ";\n"; } else { out += "refl_value.b = refl_value.r;\n"; @@ -743,10 +737,10 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) { LightingRegs::IsLightingSamplerSupported( lighting.config, LightingRegs::LightingSampler::Distribution1)) { // Lookup specular "distribution 1" LUT value - std::string index = - GetLutIndex(light_config.num, lighting.lut_d1.type, lighting.lut_d1.abs_input); - d1_lut_value = "(" + std::to_string(lighting.lut_d1.scale) + " * " + - GetLutValue(LightingRegs::LightingSampler::Distribution1, index) + ")"; + std::string value = + GetLutValue(LightingRegs::LightingSampler::Distribution1, light_config.num, + lighting.lut_d1.type, lighting.lut_d1.abs_input); + d1_lut_value = "(" + std::to_string(lighting.lut_d1.scale) + " * " + value + ")"; } std::string specular_1 = "(" + d1_lut_value + " * refl_value * " + light_src + ".specular_1)"; @@ -759,10 +753,10 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) { LightingRegs::IsLightingSamplerSupported(lighting.config, LightingRegs::LightingSampler::Fresnel)) { // Lookup fresnel LUT value - std::string index = - GetLutIndex(light_config.num, lighting.lut_fr.type, lighting.lut_fr.abs_input); - std::string value = "(" + std::to_string(lighting.lut_fr.scale) + " * " + - GetLutValue(LightingRegs::LightingSampler::Fresnel, index) + ")"; + std::string value = + GetLutValue(LightingRegs::LightingSampler::Fresnel, light_config.num, + lighting.lut_fr.type, lighting.lut_fr.abs_input); + value = "(" + std::to_string(lighting.lut_fr.scale) + " * " + value + ")"; // Enabled for difffuse lighting alpha component if (lighting.fresnel_selector == LightingRegs::LightingFresnelSelector::PrimaryAlpha || @@ -1016,10 +1010,6 @@ std::string GenerateFragmentShader(const PicaShaderConfig& config) { #define NUM_TEV_STAGES 6 #define NUM_LIGHTS 8 -// Texture coordinate offsets and scales -#define OFFSET_256 (0.5 / 256.0) -#define SCALE_256 (255.0 / 256.0) - in vec4 primary_color; in vec2 texcoord[3]; in float texcoord0_w; @@ -1061,7 +1051,7 @@ layout (std140) uniform shader_data { }; uniform sampler2D tex[3]; -uniform sampler1D lut[6]; +uniform samplerBuffer lighting_lut; uniform usampler1D fog_lut; uniform sampler1D proctex_noise_lut; uniform sampler1D proctex_color_map; @@ -1074,6 +1064,24 @@ vec3 quaternion_rotate(vec4 q, vec3 v) { return v + 2.0 * cross(q.xyz, cross(q.xyz, v) + q.w * v); } +float LookupLightingLUT(int lut_index, int index, float delta) { + vec2 entry = texelFetch(lighting_lut, lut_index * 256 + index).rg; + return entry.r + entry.g * delta; +} + +float LookupLightingLUTUnsigned(int lut_index, float pos) { + int index = clamp(int(pos * 256.0), 0, 255); + float delta = pos * 256.0 - index; + return LookupLightingLUT(lut_index, index, delta); +} + +float LookupLightingLUTSigned(int lut_index, float pos) { + int index = clamp(int(pos * 128.0), -128, 127); + float delta = pos * 128.0 - index; + if (index < 0) index += 256; + return LookupLightingLUT(lut_index, index, delta); +} + )"; if (config.state.proctex.enable) |