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#include "Material.hpp"
#include <cstdlib>
#include <cstring>
Material::Material(Shader* shader)
: mShader(shader) {
}
namespace ProjectBrussel_UNITY_ID {
template <class TUniform>
TUniform& ObtainUniform(std::vector<TUniform>& uniforms, GLint location) {
for (auto& uniform : uniforms) {
if (uniform.location == location) {
return uniform;
}
}
auto& uniform = uniforms.emplace_back();
uniform.location = location;
return uniform;
}
} // namespace ProjectBrussel_UNITY_ID
void Material::SetFloat(const char* name, float value) {
GLint location = glGetUniformLocation(mShader->GetProgram(), name);
auto& uniform = ProjectBrussel_UNITY_ID::ObtainUniform(mBoundScalars, location);
uniform.floatValue = value;
uniform.actualType = GL_FLOAT;
}
void Material::SetInt(const char* name, int32_t value) {
GLint location = glGetUniformLocation(mShader->GetProgram(), name);
auto& uniform = ProjectBrussel_UNITY_ID::ObtainUniform(mBoundScalars, location);
uniform.intValue = value;
uniform.actualType = GL_INT;
}
void Material::SetUInt(const char* name, uint32_t value) {
GLint location = glGetUniformLocation(mShader->GetProgram(), name);
auto& uniform = ProjectBrussel_UNITY_ID::ObtainUniform(mBoundScalars, location);
uniform.uintValue = value;
uniform.actualType = GL_UNSIGNED_INT;
}
template <int length>
void Material::SetVector(const char* name, const glm::vec<length, float>& vec) {
static_assert(length >= 1 && length <= 4);
GLint location = glGetUniformLocation(mShader->GetProgram(), name);
auto& uniform = ProjectBrussel_UNITY_ID::ObtainUniform(mBoundVectors, location);
uniform.actualLength = length;
std::memset(uniform.value, 0, sizeof(uniform.value));
std::memcpy(uniform.value, &vec[0], length * sizeof(float));
}
template void Material::SetVector<1>(const char*, const glm::vec<1, float>&);
template void Material::SetVector<2>(const char*, const glm::vec<2, float>&);
template void Material::SetVector<3>(const char*, const glm::vec<3, float>&);
template void Material::SetVector<4>(const char*, const glm::vec<4, float>&);
template <int width, int height>
void Material::SetMatrix(const char* name, const glm::mat<width, height, float>& mat) {
static_assert(width >= 1 && width <= 4);
static_assert(height >= 1 && height <= 4);
GLint location = glGetUniformLocation(mShader->GetProgram(), name);
auto& uniform = ProjectBrussel_UNITY_ID::ObtainUniform(mBoundMatrices, location);
uniform.actualWidth = width;
uniform.actualHeight = height;
std::memset(uniform.value, 0, sizeof(uniform.value));
std::memcpy(uniform.value, &mat[0][0], width * height * sizeof(float));
}
template void Material::SetMatrix<2, 2>(const char*, const glm::mat<2, 2, float>&);
template void Material::SetMatrix<3, 3>(const char*, const glm::mat<3, 3, float>&);
template void Material::SetMatrix<4, 4>(const char*, const glm::mat<4, 4, float>&);
template void Material::SetMatrix<2, 3>(const char*, const glm::mat<2, 3, float>&);
template void Material::SetMatrix<3, 2>(const char*, const glm::mat<3, 2, float>&);
template void Material::SetMatrix<2, 4>(const char*, const glm::mat<2, 4, float>&);
template void Material::SetMatrix<4, 2>(const char*, const glm::mat<4, 2, float>&);
template void Material::SetMatrix<3, 4>(const char*, const glm::mat<3, 4, float>&);
template void Material::SetMatrix<4, 3>(const char*, const glm::mat<4, 3, float>&);
void Material::SetTexture(const char* name, Texture* texture) {
GLint location = glGetUniformLocation(mShader->GetProgram(), name);
for (auto& uniform : mBoundTextures) {
if (uniform.location == location) {
uniform.value.Attach(texture);
return;
}
}
auto& uniform = mBoundTextures.emplace_back();
uniform.value.Attach(texture);
uniform.location = location;
}
std::span<const Material::VectorUniform> Material::GetVectors() const {
return mBoundVectors;
}
std::span<const Material::MatrixUniform> Material::GetMatrices() const {
return mBoundMatrices;
}
std::span<const Material::TextureUniform> Material::GetTextures() const {
return mBoundTextures;
}
const Shader& Material::GetShader() const {
return *mShader;
}
static constexpr int IdentifyMatrixSize(int width, int height) {
return width * 10 + height;
}
void Material::UseUniforms() const {
for (auto& uniform : mBoundScalars) {
switch (uniform.actualType) {
case GL_FLOAT: glUniform1f(uniform.location, uniform.intValue); break;
case GL_INT: glUniform1i(uniform.location, uniform.intValue); break;
case GL_UNSIGNED_INT: glUniform1ui(uniform.location, uniform.intValue); break;
default: break;
}
}
for (auto& uniform : mBoundVectors) {
switch (uniform.actualLength) {
case 1: glUniform1fv(uniform.location, 1, &uniform.value[0]); break;
case 2: glUniform2fv(uniform.location, 1, &uniform.value[0]); break;
case 3: glUniform3fv(uniform.location, 1, &uniform.value[0]); break;
case 4: glUniform4fv(uniform.location, 1, &uniform.value[0]); break;
default: break;
}
}
for (auto& uniform : mBoundMatrices) {
switch (IdentifyMatrixSize(uniform.actualWidth, uniform.actualHeight)) {
case IdentifyMatrixSize(2, 2): glUniformMatrix2fv(uniform.location, 1, GL_FALSE, uniform.value); break;
case IdentifyMatrixSize(3, 3): glUniformMatrix3fv(uniform.location, 1, GL_FALSE, uniform.value); break;
case IdentifyMatrixSize(4, 4): glUniformMatrix4fv(uniform.location, 1, GL_FALSE, uniform.value); break;
case IdentifyMatrixSize(2, 3): glUniformMatrix2x3fv(uniform.location, 1, GL_FALSE, uniform.value); break;
case IdentifyMatrixSize(3, 2): glUniformMatrix3x2fv(uniform.location, 1, GL_FALSE, uniform.value); break;
case IdentifyMatrixSize(2, 4): glUniformMatrix2x4fv(uniform.location, 1, GL_FALSE, uniform.value); break;
case IdentifyMatrixSize(4, 2): glUniformMatrix4x2fv(uniform.location, 1, GL_FALSE, uniform.value); break;
case IdentifyMatrixSize(3, 4): glUniformMatrix3x4fv(uniform.location, 1, GL_FALSE, uniform.value); break;
case IdentifyMatrixSize(4, 3): glUniformMatrix4x3fv(uniform.location, 1, GL_FALSE, uniform.value); break;
default: break;
}
}
int i = 0;
for (auto& uniform : mBoundTextures) {
glActiveTexture(GL_TEXTURE0 + i);
glBindTexture(GL_TEXTURE_2D, uniform.value->GetHandle());
glUniform1i(uniform.location, i);
++i;
}
}
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