gl_rasterizer: use texture buffer for fog LUT

This commit is contained in:
wwylele 2017-06-22 17:22:45 +03:00
parent f1e377f57e
commit 8978ecb09c
7 changed files with 32 additions and 29 deletions

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@ -111,6 +111,14 @@ struct State {
BitField<0, 13, s32> difference; // 1.1.11 fixed point BitField<0, 13, s32> difference; // 1.1.11 fixed point
BitField<13, 11, u32> value; // 0.0.11 fixed point BitField<13, 11, u32> value; // 0.0.11 fixed point
float ToFloat() const {
return static_cast<float>(value) / 2047.0f;
}
float DiffToFloat() const {
return static_cast<float>(difference) / 2047.0f;
}
}; };
std::array<LutEntry, 128> lut; std::array<LutEntry, 128> lut;

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@ -106,16 +106,14 @@ RasterizerOpenGL::RasterizerOpenGL() : shader_dirty(true) {
glTexBuffer(GL_TEXTURE_BUFFER, GL_RG32F, lighting_lut_buffer.handle); glTexBuffer(GL_TEXTURE_BUFFER, GL_RG32F, lighting_lut_buffer.handle);
// Setup the LUT for the fog // Setup the LUT for the fog
{
fog_lut.Create(); fog_lut.Create();
state.fog_lut.texture_1d = fog_lut.handle; state.fog_lut.texture_buffer = fog_lut.handle;
}
state.Apply(); state.Apply();
fog_lut_buffer.Create();
glBindBuffer(GL_TEXTURE_BUFFER, fog_lut_buffer.handle);
glBufferData(GL_TEXTURE_BUFFER, sizeof(GLfloat) * 2 * 128, nullptr, GL_DYNAMIC_DRAW);
glActiveTexture(TextureUnits::FogLUT.Enum()); glActiveTexture(TextureUnits::FogLUT.Enum());
glTexImage1D(GL_TEXTURE_1D, 0, GL_R32UI, 128, 0, GL_RED_INTEGER, GL_UNSIGNED_INT, nullptr); glTexBuffer(GL_TEXTURE_BUFFER, GL_RG32F, fog_lut_buffer.handle);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
// Setup the noise LUT for proctex // Setup the noise LUT for proctex
proctex_noise_lut.Create(); proctex_noise_lut.Create();
@ -1356,16 +1354,17 @@ void RasterizerOpenGL::SyncFogColor() {
} }
void RasterizerOpenGL::SyncFogLUT() { void RasterizerOpenGL::SyncFogLUT() {
std::array<GLuint, 128> new_data; std::array<GLvec2, 128> new_data;
std::transform(Pica::g_state.fog.lut.begin(), Pica::g_state.fog.lut.end(), new_data.begin(), std::transform(Pica::g_state.fog.lut.begin(), Pica::g_state.fog.lut.end(), new_data.begin(),
[](const auto& entry) { return entry.raw; }); [](const auto& entry) {
return GLvec2{entry.ToFloat(), entry.DiffToFloat()};
});
if (new_data != fog_lut_data) { if (new_data != fog_lut_data) {
fog_lut_data = new_data; fog_lut_data = new_data;
glActiveTexture(TextureUnits::FogLUT.Enum()); glBindBuffer(GL_TEXTURE_BUFFER, fog_lut_buffer.handle);
glTexSubImage1D(GL_TEXTURE_1D, 0, 0, 128, GL_RED_INTEGER, GL_UNSIGNED_INT, glBufferSubData(GL_TEXTURE_BUFFER, 0, new_data.size() * sizeof(GLvec2), new_data.data());
fog_lut_data.data());
} }
} }

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@ -283,8 +283,9 @@ private:
OGLTexture lighting_lut; OGLTexture lighting_lut;
std::array<std::array<GLvec2, 256>, Pica::LightingRegs::NumLightingSampler> lighting_lut_data{}; std::array<std::array<GLvec2, 256>, Pica::LightingRegs::NumLightingSampler> lighting_lut_data{};
OGLBuffer fog_lut_buffer;
OGLTexture fog_lut; OGLTexture fog_lut;
std::array<GLuint, 128> fog_lut_data{}; std::array<GLvec2, 128> fog_lut_data{};
OGLTexture proctex_noise_lut; OGLTexture proctex_noise_lut;
std::array<GLvec2, 128> proctex_noise_lut_data{}; std::array<GLvec2, 128> proctex_noise_lut_data{};

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@ -1052,7 +1052,7 @@ layout (std140) uniform shader_data {
uniform sampler2D tex[3]; uniform sampler2D tex[3];
uniform samplerBuffer lighting_lut; uniform samplerBuffer lighting_lut;
uniform usampler1D fog_lut; uniform samplerBuffer fog_lut;
uniform sampler1D proctex_noise_lut; uniform sampler1D proctex_noise_lut;
uniform sampler1D proctex_color_map; uniform sampler1D proctex_color_map;
uniform sampler1D proctex_alpha_map; uniform sampler1D proctex_alpha_map;
@ -1145,12 +1145,8 @@ vec4 secondary_fragment_color = vec4(0.0);
// Generate clamped fog factor from LUT for given fog index // Generate clamped fog factor from LUT for given fog index
out += "float fog_i = clamp(floor(fog_index), 0.0, 127.0);\n"; out += "float fog_i = clamp(floor(fog_index), 0.0, 127.0);\n";
out += "float fog_f = fog_index - fog_i;\n"; out += "float fog_f = fog_index - fog_i;\n";
out += "uint fog_lut_entry = texelFetch(fog_lut, int(fog_i), 0).r;\n"; out += "vec2 fog_lut_entry = texelFetch(fog_lut, int(fog_i)).rg;\n";
out += "float fog_lut_entry_difference = float(int((fog_lut_entry & 0x1FFFU) << 19U) >> " out += "float fog_factor = fog_lut_entry.r + fog_lut_entry.g * fog_f;\n";
"19);\n"; // Extract signed difference
out += "float fog_lut_entry_value = float((fog_lut_entry >> 13U) & 0x7FFU);\n";
out += "float fog_factor = (fog_lut_entry_value + fog_lut_entry_difference * fog_f) / "
"2047.0;\n";
out += "fog_factor = clamp(fog_factor, 0.0, 1.0);\n"; out += "fog_factor = clamp(fog_factor, 0.0, 1.0);\n";
// Blend the fog // Blend the fog

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@ -54,7 +54,7 @@ OpenGLState::OpenGLState() {
lighting_lut.texture_buffer = 0; lighting_lut.texture_buffer = 0;
fog_lut.texture_1d = 0; fog_lut.texture_buffer = 0;
proctex_lut.texture_1d = 0; proctex_lut.texture_1d = 0;
proctex_diff_lut.texture_1d = 0; proctex_diff_lut.texture_1d = 0;
@ -198,9 +198,9 @@ void OpenGLState::Apply() const {
} }
// Fog LUT // Fog LUT
if (fog_lut.texture_1d != cur_state.fog_lut.texture_1d) { if (fog_lut.texture_buffer != cur_state.fog_lut.texture_buffer) {
glActiveTexture(TextureUnits::FogLUT.Enum()); glActiveTexture(TextureUnits::FogLUT.Enum());
glBindTexture(GL_TEXTURE_1D, fog_lut.texture_1d); glBindTexture(GL_TEXTURE_BUFFER, fog_lut.texture_buffer);
} }
// ProcTex Noise LUT // ProcTex Noise LUT
@ -272,8 +272,8 @@ void OpenGLState::ResetTexture(GLuint handle) {
} }
if (cur_state.lighting_lut.texture_buffer == handle) if (cur_state.lighting_lut.texture_buffer == handle)
cur_state.lighting_lut.texture_buffer = 0; cur_state.lighting_lut.texture_buffer = 0;
if (cur_state.fog_lut.texture_1d == handle) if (cur_state.fog_lut.texture_buffer == handle)
cur_state.fog_lut.texture_1d = 0; cur_state.fog_lut.texture_buffer = 0;
if (cur_state.proctex_noise_lut.texture_1d == handle) if (cur_state.proctex_noise_lut.texture_1d == handle)
cur_state.proctex_noise_lut.texture_1d = 0; cur_state.proctex_noise_lut.texture_1d = 0;
if (cur_state.proctex_color_map.texture_1d == handle) if (cur_state.proctex_color_map.texture_1d == handle)

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@ -91,7 +91,7 @@ public:
} lighting_lut; } lighting_lut;
struct { struct {
GLuint texture_1d; // GL_TEXTURE_BINDING_1D GLuint texture_buffer; // GL_TEXTURE_BINDING_BUFFER
} fog_lut; } fog_lut;
struct { struct {

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@ -584,8 +584,7 @@ static void ProcessTriangleInternal(const Vertex& v0, const Vertex& v1, const Ve
float fog_i = MathUtil::Clamp(floorf(fog_index), 0.0f, 127.0f); float fog_i = MathUtil::Clamp(floorf(fog_index), 0.0f, 127.0f);
float fog_f = fog_index - fog_i; float fog_f = fog_index - fog_i;
const auto& fog_lut_entry = g_state.fog.lut[static_cast<unsigned int>(fog_i)]; const auto& fog_lut_entry = g_state.fog.lut[static_cast<unsigned int>(fog_i)];
float fog_factor = (fog_lut_entry.value + fog_lut_entry.difference * fog_f) / float fog_factor = fog_lut_entry.ToFloat() + fog_lut_entry.DiffToFloat() * fog_f;
2047.0f; // This is signed fixed point 1.11
fog_factor = MathUtil::Clamp(fog_factor, 0.0f, 1.0f); fog_factor = MathUtil::Clamp(fog_factor, 0.0f, 1.0f);
// Blend the fog // Blend the fog