eden-emu
/
eden
mirror of https://git.eden-emu.dev/eden-emu/eden.git
1
0
Fork 0
Code Releases Wiki Activity
Browse Source

Merge pull request #2727 from wwylele/spot-light 

Fragment lighting: implement spot light
pull/15/merge
Sebastian Valle 9 years ago
committed by GitHub
parent
9a8a90b52b 10906dceec
commit
39c7c1f580
5 changed files with 128 additions and 28 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 63
      src/video_core/regs_lighting.h
  2. 45
      src/video_core/renderer_opengl/gl_rasterizer.cpp
  3. 6
      src/video_core/renderer_opengl/gl_rasterizer.h
  4. 39
      src/video_core/renderer_opengl/gl_shader_gen.cpp
  5. 3
      src/video_core/renderer_opengl/gl_shader_gen.h

63
src/video_core/regs_lighting.h
View File

@ -26,6 +26,16 @@ struct LightingRegs {
DistanceAttenuation = 16,
};
static LightingSampler SpotlightAttenuationSampler(unsigned index) {
return static_cast<LightingSampler>(
static_cast<unsigned>(LightingSampler::SpotlightAttenuation) + index);
}
static LightingSampler DistanceAttenuationSampler(unsigned index) {
return static_cast<LightingSampler>(
static_cast<unsigned>(LightingSampler::DistanceAttenuation) + index);
}
/**
* 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,
@ -73,6 +83,8 @@ struct LightingRegs {
VH = 1, // Cosine of the angle between the view and half-angle vectors
NV = 2, // Cosine of the angle between the normal and the view vector
LN = 3, // Cosine of the angle between the light and the normal vectors
SP = 4, // Cosine of the angle between the light and the inverse spotlight vectors
CP = 5, // TODO: document and implement
};
enum class LightingBumpMode : u32 {
@ -104,6 +116,9 @@ struct LightingRegs {
return (config != LightingConfig::Config0) && (config != LightingConfig::Config1) &&
(config != LightingConfig::Config5);
case LightingSampler::SpotlightAttenuation:
return (config != LightingConfig::Config2) && (config != LightingConfig::Config3);
case LightingSampler::Fresnel:
return (config != LightingConfig::Config0) && (config != LightingConfig::Config2) &&
(config != LightingConfig::Config4);
@ -116,11 +131,10 @@ struct LightingRegs {
return (config == LightingConfig::Config4) || (config == LightingConfig::Config5) ||
(config == LightingConfig::Config7);
default:
UNREACHABLE_MSG("Regs::IsLightingSamplerSupported: Reached "
"unreachable section, sampler should be one "
"of Distribution0, Distribution1, Fresnel, "
"ReflectRed, ReflectGreen or ReflectBlue, instead "
"got %i",
UNREACHABLE_MSG("Regs::IsLightingSamplerSupported: Reached unreachable section, "
"sampler should be one of Distribution0, Distribution1, "
"SpotlightAttenuation, Fresnel, ReflectRed, ReflectGreen or "
"ReflectBlue, instead got %i",
static_cast<int>(config));
}
}
@ -140,7 +154,16 @@ struct LightingRegs {
BitField<0, 16, u32> z;
};
INSERT_PADDING_WORDS(0x3);
// inverse spotlight direction vector, encoded as fixed1.1.11
union {
BitField<0, 13, s32> spot_x;
BitField<16, 13, s32> spot_y;
};
union {
BitField<0, 13, s32> spot_z;
};
INSERT_PADDING_WORDS(0x1);
union {
BitField<0, 1, u32> directional;
@ -169,8 +192,16 @@ struct LightingRegs {
} config0;
union {
u32 raw;
// Each bit specifies whether spot light attenuation should be applied for the corresponding
// light.
BitField<8, 8, u32> disable_spot_atten;
BitField<16, 1, u32> disable_lut_d0;
BitField<17, 1, u32> disable_lut_d1;
// Note: by intuition, BitField<18, 1, u32> should be disable_lut_sp, but it is actually a
// dummy bit which is always set as 1.
BitField<19, 1, u32> disable_lut_fr;
BitField<20, 1, u32> disable_lut_rr;
BitField<21, 1, u32> disable_lut_rg;
@ -178,23 +209,15 @@ struct LightingRegs {
// Each bit specifies whether distance attenuation should be applied for the corresponding
// light.
BitField<24, 1, u32> disable_dist_atten_light_0;
BitField<25, 1, u32> disable_dist_atten_light_1;
BitField<26, 1, u32> disable_dist_atten_light_2;
BitField<27, 1, u32> disable_dist_atten_light_3;
BitField<28, 1, u32> disable_dist_atten_light_4;
BitField<29, 1, u32> disable_dist_atten_light_5;
BitField<30, 1, u32> disable_dist_atten_light_6;
BitField<31, 1, u32> disable_dist_atten_light_7;
BitField<24, 8, u32> disable_dist_atten;
} config1;
bool IsDistAttenDisabled(unsigned index) const {
const unsigned disable[] = {
config1.disable_dist_atten_light_0, config1.disable_dist_atten_light_1,
config1.disable_dist_atten_light_2, config1.disable_dist_atten_light_3,
config1.disable_dist_atten_light_4, config1.disable_dist_atten_light_5,
config1.disable_dist_atten_light_6, config1.disable_dist_atten_light_7};
return disable[index] != 0;
return (config1.disable_dist_atten & (1 << index)) != 0;
}
bool IsSpotAttenDisabled(unsigned index) const {
return (config1.disable_spot_atten & (1 << index)) != 0;
}
union {

45
src/video_core/renderer_opengl/gl_rasterizer.cpp
View File

@ -735,6 +735,40 @@ void RasterizerOpenGL::NotifyPicaRegisterChanged(u32 id) {
SyncLightPosition(7);
break;
// Fragment spot lighting direction
case PICA_REG_INDEX_WORKAROUND(lighting.light[0].spot_x, 0x146 + 0 * 0x10):
case PICA_REG_INDEX_WORKAROUND(lighting.light[0].spot_z, 0x147 + 0 * 0x10):
SyncLightSpotDirection(0);
break;
case PICA_REG_INDEX_WORKAROUND(lighting.light[1].spot_x, 0x146 + 1 * 0x10):
case PICA_REG_INDEX_WORKAROUND(lighting.light[1].spot_z, 0x147 + 1 * 0x10):
SyncLightSpotDirection(1);
break;
case PICA_REG_INDEX_WORKAROUND(lighting.light[2].spot_x, 0x146 + 2 * 0x10):
case PICA_REG_INDEX_WORKAROUND(lighting.light[2].spot_z, 0x147 + 2 * 0x10):
SyncLightSpotDirection(2);
break;
case PICA_REG_INDEX_WORKAROUND(lighting.light[3].spot_x, 0x146 + 3 * 0x10):
case PICA_REG_INDEX_WORKAROUND(lighting.light[3].spot_z, 0x147 + 3 * 0x10):
SyncLightSpotDirection(3);
break;
case PICA_REG_INDEX_WORKAROUND(lighting.light[4].spot_x, 0x146 + 4 * 0x10):
case PICA_REG_INDEX_WORKAROUND(lighting.light[4].spot_z, 0x147 + 4 * 0x10):
SyncLightSpotDirection(4);
break;
case PICA_REG_INDEX_WORKAROUND(lighting.light[5].spot_x, 0x146 + 5 * 0x10):
case PICA_REG_INDEX_WORKAROUND(lighting.light[5].spot_z, 0x147 + 5 * 0x10):
SyncLightSpotDirection(5);
break;
case PICA_REG_INDEX_WORKAROUND(lighting.light[6].spot_x, 0x146 + 6 * 0x10):
case PICA_REG_INDEX_WORKAROUND(lighting.light[6].spot_z, 0x147 + 6 * 0x10):
SyncLightSpotDirection(6);
break;
case PICA_REG_INDEX_WORKAROUND(lighting.light[7].spot_x, 0x146 + 7 * 0x10):
case PICA_REG_INDEX_WORKAROUND(lighting.light[7].spot_z, 0x147 + 7 * 0x10):
SyncLightSpotDirection(7);
break;
// Fragment lighting light source config
case PICA_REG_INDEX_WORKAROUND(lighting.light[0].config, 0x149 + 0 * 0x10):
case PICA_REG_INDEX_WORKAROUND(lighting.light[1].config, 0x149 + 1 * 0x10):
@ -1595,6 +1629,17 @@ void RasterizerOpenGL::SyncLightPosition(int light_index) {
}
}
void RasterizerOpenGL::SyncLightSpotDirection(int light_index) {
const auto& light = Pica::g_state.regs.lighting.light[light_index];
GLvec3 spot_direction = {light.spot_x / 2047.0f, light.spot_y / 2047.0f,
light.spot_z / 2047.0f};
if (spot_direction != uniform_block_data.data.light_src[light_index].spot_direction) {
uniform_block_data.data.light_src[light_index].spot_direction = spot_direction;
uniform_block_data.dirty = true;
}
}
void RasterizerOpenGL::SyncLightDistanceAttenuationBias(int light_index) {
GLfloat dist_atten_bias =
Pica::float20::FromRaw(Pica::g_state.regs.lighting.light[light_index].dist_atten_bias)

6
src/video_core/renderer_opengl/gl_rasterizer.h
View File

@ -125,6 +125,7 @@ private:
alignas(16) GLvec3 diffuse;
alignas(16) GLvec3 ambient;
alignas(16) GLvec3 position;
alignas(16) GLvec3 spot_direction; // negated
GLfloat dist_atten_bias;
GLfloat dist_atten_scale;
};
@ -153,7 +154,7 @@ private:
};
static_assert(
sizeof(UniformData) == 0x3E0,
sizeof(UniformData) == 0x460,
"The size of the UniformData structure has changed, update the structure in the shader");
static_assert(sizeof(UniformData) < 16384,
"UniformData structure must be less than 16kb as per the OpenGL spec");
@ -241,6 +242,9 @@ private:
/// Syncs the specified light's position to match the PICA register
void SyncLightPosition(int light_index);
/// Syncs the specified spot light direcition to match the PICA register
void SyncLightSpotDirection(int light_index);
/// Syncs the specified light's distance attenuation bias to match the PICA register
void SyncLightDistanceAttenuationBias(int light_index);

39
src/video_core/renderer_opengl/gl_shader_gen.cpp
View File

@ -75,6 +75,8 @@ PicaShaderConfig PicaShaderConfig::BuildFromRegs(const Pica::Regs& regs) {
state.lighting.light[light_index].two_sided_diffuse = light.config.two_sided_diffuse != 0;
state.lighting.light[light_index].dist_atten_enable =
!regs.lighting.IsDistAttenDisabled(num);
state.lighting.light[light_index].spot_atten_enable =
!regs.lighting.IsSpotAttenDisabled(num);
}
state.lighting.lut_d0.enable = regs.lighting.config1.disable_lut_d0 == 0;
@ -87,6 +89,12 @@ PicaShaderConfig PicaShaderConfig::BuildFromRegs(const Pica::Regs& regs) {
state.lighting.lut_d1.type = regs.lighting.lut_input.d1.Value();
state.lighting.lut_d1.scale = regs.lighting.lut_scale.GetScale(regs.lighting.lut_scale.d1);
// this is a dummy field due to lack of the corresponding register
state.lighting.lut_sp.enable = true;
state.lighting.lut_sp.abs_input = regs.lighting.abs_lut_input.disable_sp == 0;
state.lighting.lut_sp.type = regs.lighting.lut_input.sp.Value();
state.lighting.lut_sp.scale = regs.lighting.lut_scale.GetScale(regs.lighting.lut_scale.sp);
state.lighting.lut_fr.enable = regs.lighting.config1.disable_lut_fr == 0;
state.lighting.lut_fr.abs_input = regs.lighting.abs_lut_input.disable_fr == 0;
state.lighting.lut_fr.type = regs.lighting.lut_input.fr.Value();
@ -509,7 +517,8 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) {
out += "vec4 diffuse_sum = vec4(0.0, 0.0, 0.0, 1.0);\n"
"vec4 specular_sum = vec4(0.0, 0.0, 0.0, 1.0);\n"
"vec3 light_vector = vec3(0.0);\n"
"vec3 refl_value = vec3(0.0);\n";
"vec3 refl_value = vec3(0.0);\n"
"vec3 spot_dir = vec3(0.0);\n;";
// Compute fragment normals
if (lighting.bump_mode == LightingRegs::LightingBumpMode::NormalMap) {
@ -560,6 +569,10 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) {
index = std::string("dot(light_vector, normal)");
break;
case LightingRegs::LightingLutInput::SP:
index = std::string("dot(light_vector, spot_dir)");
break;
default:
LOG_CRITICAL(HW_GPU, "Unknown lighting LUT input %d\n", (int)input);
UNIMPLEMENTED();
@ -596,21 +609,34 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) {
else
out += "light_vector = normalize(" + light_src + ".position + view);\n";
out += "spot_dir = " + light_src + ".spot_direction;\n";
// Compute dot product of light_vector and normal, adjust if lighting is one-sided or
// two-sided
std::string dot_product = light_config.two_sided_diffuse
? "abs(dot(light_vector, normal))"
: "max(dot(light_vector, normal), 0.0)";
// If enabled, compute spot light attenuation value
std::string spot_atten = "1.0";
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) + ")";
}
// 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))";
const unsigned lut_num =
((unsigned)LightingRegs::LightingSampler::DistanceAttenuation + light_config.num);
dist_atten = GetLutValue((LightingRegs::LightingSampler)lut_num, index);
auto sampler = LightingRegs::DistanceAttenuationSampler(light_config.num);
dist_atten = GetLutValue(sampler, index);
}
// If enabled, clamp specular component if lighting result is negative
@ -711,11 +737,11 @@ static void WriteLighting(std::string& out, const PicaShaderConfig& config) {
// Compute primary fragment color (diffuse lighting) function
out += "diffuse_sum.rgb += ((" + light_src + ".diffuse * " + dot_product + ") + " +
light_src + ".ambient) * " + dist_atten + ";\n";
light_src + ".ambient) * " + dist_atten + " * " + spot_atten + ";\n";
// Compute secondary fragment color (specular lighting) function
out += "specular_sum.rgb += (" + specular_0 + " + " + specular_1 + ") * " +
clamp_highlights + " * " + dist_atten + ";\n";
clamp_highlights + " * " + dist_atten + " * " + spot_atten + ";\n";
}
// Sum final lighting result
@ -967,6 +993,7 @@ struct LightSrc {
vec3 diffuse;
vec3 ambient;
vec3 position;
vec3 spot_direction;
float dist_atten_bias;
float dist_atten_scale;
};

3
src/video_core/renderer_opengl/gl_shader_gen.h
View File

@ -93,6 +93,7 @@ union PicaShaderConfig {
bool directional;
bool two_sided_diffuse;
bool dist_atten_enable;
bool spot_atten_enable;
} light[8];
bool enable;
@ -110,7 +111,7 @@ union PicaShaderConfig {
bool abs_input;
Pica::LightingRegs::LightingLutInput type;
float scale;
} lut_d0, lut_d1, lut_fr, lut_rr, lut_rg, lut_rb;
} lut_d0, lut_d1, lut_sp, lut_fr, lut_rr, lut_rg, lut_rb;
} lighting;
struct {

Write Preview
Loading…
Cancel
Save