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gl_shader_gen: Refactor lighting config to match Pica register naming. 

- Also implement D0 LUT enable.
pull/15/merge
bunnei 10 years ago
parent
6307999116
commit
3d89dacd56
3 changed files with 50 additions and 42 deletions
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  1. 2
      src/video_core/pica.h
  2. 60
      src/video_core/renderer_opengl/gl_rasterizer.h
  3. 30
      src/video_core/renderer_opengl/gl_shader_gen.cpp

2
src/video_core/pica.h
View File

@ -718,6 +718,8 @@ struct Regs {
};
union {
BitField<16, 1, u32> lut_enable_d0; // 0: GL_TRUE, 1: GL_FALSE
// Each bit specifies whether distance attenuation should be applied for the
// corresponding light

60
src/video_core/renderer_opengl/gl_rasterizer.h
View File

@ -73,23 +73,24 @@ struct PicaShaderConfig {
// Fragment lighting
res.lighting_enabled = !regs.lighting.disable;
res.num_lights = regs.lighting.src_num + 1;
res.lighting.enable = !regs.lighting.disable;
res.lighting.src_num = regs.lighting.src_num + 1;
for (unsigned light_index = 0; light_index < res.num_lights; ++light_index) {
for (unsigned light_index = 0; light_index < res.lighting.src_num; ++light_index) {
unsigned num = regs.lighting.light_enable.GetNum(light_index);
const auto& light = regs.lighting.light[num];
res.light_src[light_index].num = num;
res.light_src[light_index].directional = light.directional != 0;
res.light_src[light_index].two_sided_diffuse = light.two_sided_diffuse != 0;
res.light_src[light_index].dist_atten_enabled = regs.lighting.IsDistAttenEnabled(num);
res.light_src[light_index].dist_atten_bias = Pica::float20::FromRawFloat20(light.dist_atten_bias).ToFloat32();
res.light_src[light_index].dist_atten_scale = Pica::float20::FromRawFloat20(light.dist_atten_scale).ToFloat32();
res.lighting.light[light_index].num = num;
res.lighting.light[light_index].directional = light.directional != 0;
res.lighting.light[light_index].two_sided_diffuse = light.two_sided_diffuse != 0;
res.lighting.light[light_index].dist_atten_enable = regs.lighting.IsDistAttenEnabled(num);
res.lighting.light[light_index].dist_atten_bias = Pica::float20::FromRawFloat20(light.dist_atten_bias).ToFloat32();
res.lighting.light[light_index].dist_atten_scale = Pica::float20::FromRawFloat20(light.dist_atten_scale).ToFloat32();
}
res.lighting_lut.d0_abs = regs.lighting.abs_lut_input.d0 == 0;
res.lighting_lut.d0_type = (Pica::Regs::LightingLutInput)regs.lighting.lut_input.d0.Value();
res.clamp_highlights = regs.lighting.clamp_highlights != 0;
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.clamp_highlights = regs.lighting.clamp_highlights != 0;
return res;
}
@ -112,22 +113,25 @@ struct PicaShaderConfig {
u8 combiner_buffer_input = 0;
struct {
unsigned num = 0;
bool directional = false;
bool two_sided_diffuse = false;
bool dist_atten_enabled = false;
GLfloat dist_atten_scale = 0.0f;
GLfloat dist_atten_bias = 0.0f;
} light_src[8];
bool lighting_enabled = false;
unsigned num_lights = 0;
bool clamp_highlights = false;
struct {
bool d0_abs = false;
Pica::Regs::LightingLutInput d0_type = Pica::Regs::LightingLutInput::NH;
} lighting_lut;
struct {
unsigned num = 0;
bool directional = false;
bool two_sided_diffuse = false;
bool dist_atten_enable = false;
GLfloat dist_atten_scale = 0.0f;
GLfloat dist_atten_bias = 0.0f;
} light[8];
bool enable = false;
unsigned src_num = 0;
bool clamp_highlights = false;
struct {
bool enable = false;
bool abs_input = false;
Pica::Regs::LightingLutInput type = Pica::Regs::LightingLutInput::NH;
} lut_d0;
} lighting;
};
};

30
src/video_core/renderer_opengl/gl_shader_gen.cpp
View File

@ -360,7 +360,7 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) {
if (abs) {
// LUT index is in the range of (0.0, 1.0)
index = config.light_src[light_num].two_sided_diffuse ? "abs(" + index + ")" : "max(" + index + ", 0.f)";
index = config.lighting.light[light_num].two_sided_diffuse ? "abs(" + index + ")" : "max(" + index + ", 0.f)";
return "clamp(" + index + ", 0.0, FLOAT_255)";
} else {
// LUT index is in the range of (-1.0, 1.0)
@ -378,10 +378,9 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) {
};
// Write the code to emulate each enabled light
for (unsigned light_index = 0; light_index < config.num_lights; ++light_index) {
unsigned num = config.light_src[light_index].num;
const auto& light_config = config.light_src[light_index];
std::string light_src = "light_src[" + std::to_string(num) + "]";
for (unsigned light_index = 0; light_index < config.lighting.src_num; ++light_index) {
const auto& light_config = config.lighting.light[light_index];
std::string light_src = "light_src[" + std::to_string(light_config.num) + "]";
// Compute light vector (directional or positional)
if (light_config.directional)
@ -394,12 +393,12 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) {
// If enabled, compute distance attenuation value
std::string dist_atten = "1.0";
if (light_config.dist_atten_enabled) {
if (light_config.dist_atten_enable) {
std::string scale = std::to_string(light_config.dist_atten_scale);
std::string bias = std::to_string(light_config.dist_atten_bias);
std::string lut_index = "(" + scale + " * length(-view - " + light_src + ".position) + " + bias + ")";
lut_index = "((clamp(" + lut_index + ", 0.0, FLOAT_255)))";
const unsigned lut_num = ((unsigned)Regs::LightingSampler::DistanceAttenuation + num);
const unsigned lut_num = ((unsigned)Regs::LightingSampler::DistanceAttenuation + light_config.num);
dist_atten = GetLutValue((Regs::LightingSampler)lut_num, lut_index);
}
@ -407,11 +406,14 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) {
out += "diffuse_sum += ((" + light_src + ".diffuse * " + dot_product + ") + " + light_src + ".ambient) * " + dist_atten + ";\n";
// If enabled, clamp specular component if lighting result is negative
std::string clamp_highlights = config.clamp_highlights ? "(dot(light_vector, normal) <= 0.0 ? 0.0 : 1.0)" : "1.0";
std::string clamp_highlights = config.lighting.clamp_highlights ? "(dot(light_vector, normal) <= 0.0 ? 0.0 : 1.0)" : "1.0";
// Lookup specular distribution 0 LUT value
std::string d0_lut_index = GetLutIndex(num, config.lighting_lut.d0_type, config.lighting_lut.d0_abs);
std::string d0_lut_value = GetLutValue(Regs::LightingSampler::Distribution0, d0_lut_index);
// Lookup specular "distribution 0" LUT value
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);
}
// Compute secondary fragment color (specular lighting) function
out += "specular_sum += " + clamp_highlights + " * " + d0_lut_value + " * " + light_src + ".specular_0 * " + dist_atten + ";\n";
@ -463,15 +465,15 @@ vec4 primary_fragment_color = vec4(0.0);
vec4 secondary_fragment_color = vec4(0.0);
)";
if (config.lighting_enabled)
WriteLighting(out, config);
// 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 == Regs::CompareFunc::Never) {
out += "discard; }";
return out;
}
if (config.lighting.enable)
WriteLighting(out, config);
out += "vec4 combiner_buffer = vec4(0.0);\n";
out += "vec4 next_combiner_buffer = tev_combiner_buffer_color;\n";
out += "vec4 last_tex_env_out = vec4(0.0);\n";

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