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-rw-r--r--src/video_core/pica.h68
-rw-r--r--src/video_core/renderer_opengl/gl_rasterizer.h4
-rw-r--r--src/video_core/renderer_opengl/gl_shader_gen.cpp2
3 files changed, 71 insertions, 3 deletions
diff --git a/src/video_core/pica.h b/src/video_core/pica.h
index b1cf072f1..5d27da5d1 100644
--- a/src/video_core/pica.h
+++ b/src/video_core/pica.h
@@ -657,6 +657,44 @@ struct Regs {
DistanceAttenuation = 16,
};
+ /**
+ * Pica fragment lighting supports using different LUTs for each lighting component:
+ * Reflectance R, G, and B channels, distribution function for specular components 0 and 1,
+ * fresnel factor, and spotlight attenuation. Furthermore, which LUTs are used for each channel
+ * (or whether a channel is enabled at all) is specified by various pre-defined lighting
+ * configurations. With configurations that require more LUTs, more cycles are required on HW to
+ * perform lighting computations.
+ */
+ enum class LightingConfig {
+ Config0 = 0, ///< Reflect Red, Distribution 0, Spotlight
+ Config1 = 1, ///< Reflect Red, Fresnel, Spotlight
+ Config2 = 2, ///< Reflect Red, Distribution 0/1
+ Config3 = 3, ///< Distribution 0/1, Fresnel
+ Config4 = 4, ///< Reflect Red/Green/Blue, Distribution 0/1, Spotlight
+ Config5 = 5, ///< Reflect Red/Green/Blue, Distribution 0, Fresnel, Spotlight
+ Config6 = 6, ///< Reflect Red, Distribution 0/1, Fresnel, Spotlight
+ Config7 = 8, ///< Reflect Red/Green/Blue, Distribution 0/1, Fresnel, Spotlight
+ ///< NOTE: '8' is intentional, '7' does not appear to be a valid configuration
+ };
+
+ /// Selects which lighting components are affected by fresnel
+ enum class LightingFresnelSelector {
+ None = 0, ///< Fresnel is disabled
+ PrimaryAlpha = 1, ///< Primary (diffuse) lighting alpha is affected by fresnel
+ SecondaryAlpha = 2, ///< Secondary (specular) lighting alpha is affected by fresnel
+ Both = PrimaryAlpha | SecondaryAlpha, ///< Both primary and secondary lighting alphas are affected by fresnel
+ };
+
+ /// Factor used to scale the output of a lighting LUT
+ enum class LightingScale {
+ Scale1 = 0, ///< Scale is 1x
+ Scale2 = 1, ///< Scale is 2x
+ Scale4 = 2, ///< Scale is 4x
+ Scale8 = 3, ///< Scale is 8x
+ Scale1_4 = 6, ///< Scale is 0.25x
+ Scale1_2 = 7, ///< Scale is 0.5x
+ };
+
enum class LightingLutInput {
NH = 0, // Cosine of the angle between the normal and half-angle vectors
VH = 1, // Cosine of the angle between the view and half-angle vectors
@@ -775,7 +813,35 @@ struct Regs {
BitField<24, 3, u32> rr;
} lut_input;
- INSERT_PADDING_WORDS(0x7);
+ union {
+ BitField< 0, 3, LightingScale> d0;
+ BitField< 4, 3, LightingScale> d1;
+ BitField< 8, 3, LightingScale> sp;
+ BitField<12, 3, LightingScale> fr;
+ BitField<16, 3, LightingScale> rb;
+ BitField<20, 3, LightingScale> rg;
+ BitField<24, 3, LightingScale> rr;
+
+ static float GetScale(LightingScale scale) {
+ switch (scale) {
+ case LightingScale::Scale1:
+ return 1.0f;
+ case LightingScale::Scale2:
+ return 2.0f;
+ case LightingScale::Scale4:
+ return 4.0f;
+ case LightingScale::Scale8:
+ return 8.0f;
+ case LightingScale::Scale1_4:
+ return 0.25f;
+ case LightingScale::Scale1_2:
+ return 0.5f;
+ }
+ return 0.0f;
+ }
+ } lut_scale;
+
+ INSERT_PADDING_WORDS(0x6);
union {
// There are 8 light enable "slots", corresponding to the total number of lights
diff --git a/src/video_core/renderer_opengl/gl_rasterizer.h b/src/video_core/renderer_opengl/gl_rasterizer.h
index 2042be786..72ded8f22 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.h
+++ b/src/video_core/renderer_opengl/gl_rasterizer.h
@@ -90,6 +90,7 @@ struct PicaShaderConfig {
res.lighting.lut_d0.enable = regs.lighting.lut_enable_d0 == 0;
res.lighting.lut_d0.abs_input = regs.lighting.abs_lut_input.d0 == 0;
res.lighting.lut_d0.type = (Pica::Regs::LightingLutInput)regs.lighting.lut_input.d0.Value();
+ res.lighting.lut_d0.scale = regs.lighting.lut_scale.GetScale(regs.lighting.lut_scale.d0);
res.lighting.clamp_highlights = regs.lighting.clamp_highlights != 0;
return res;
@@ -130,7 +131,8 @@ struct PicaShaderConfig {
bool enable = false;
bool abs_input = false;
Pica::Regs::LightingLutInput type = Pica::Regs::LightingLutInput::NH;
- } lut_d0;
+ float scale = 1.0f;
+ } lut_d0, lut_d1, lut_fr;
} lighting;
};
};
diff --git a/src/video_core/renderer_opengl/gl_shader_gen.cpp b/src/video_core/renderer_opengl/gl_shader_gen.cpp
index a2770cc6e..9044a3813 100644
--- a/src/video_core/renderer_opengl/gl_shader_gen.cpp
+++ b/src/video_core/renderer_opengl/gl_shader_gen.cpp
@@ -412,7 +412,7 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) {
std::string d0_lut_value = "1.0";
if (config.lighting.lut_d0.enable) {
std::string d0_lut_index = GetLutIndex(light_config.num, config.lighting.lut_d0.type, config.lighting.lut_d0.abs_input);
- d0_lut_value = GetLutValue(Regs::LightingSampler::Distribution0, d0_lut_index);
+ d0_lut_value = "(" + std::to_string(config.lighting.lut_d0.scale) + " * " + GetLutValue(Regs::LightingSampler::Distribution0, d0_lut_index) + ")";
}
// Compute secondary fragment color (specular lighting) function