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#include "GLUniform.h"
#include "GLDebug.h"
#include "../../../Main.h"
namespace nCine
{
GLUniform::GLUniform()
: index_(0), blockIndex_(-1), location_(-1), size_(0), type_(GL_FLOAT), offset_(0)
{
name_[0] = '\0';
}
GLUniform::GLUniform(GLuint program, GLuint index)
: GLUniform()
{
GLsizei length;
glGetActiveUniform(program, index, MaxNameLength, &length, &size_, &type_, name_);
DEATH_ASSERT(length <= MaxNameLength);
if (!HasReservedPrefix()) {
location_ = glGetUniformLocation(program, name_);
}
GL_LOG_ERRORS();
}
GLenum GLUniform::GetBasicType() const
{
switch (type_) {
case GL_FLOAT:
case GL_FLOAT_VEC2:
case GL_FLOAT_VEC3:
case GL_FLOAT_VEC4:
return GL_FLOAT;
case GL_INT:
case GL_INT_VEC2:
case GL_INT_VEC3:
case GL_INT_VEC4:
return GL_INT;
case GL_BOOL:
case GL_BOOL_VEC2:
case GL_BOOL_VEC3:
case GL_BOOL_VEC4:
return GL_BOOL;
case GL_FLOAT_MAT2:
case GL_FLOAT_MAT3:
case GL_FLOAT_MAT4:
return GL_FLOAT;
#if !defined(WITH_OPENGLES) // not available in OpenGL ES
case GL_SAMPLER_1D:
#endif
case GL_SAMPLER_2D:
case GL_SAMPLER_3D:
case GL_SAMPLER_CUBE:
#if !defined(WITH_OPENGLES) || (defined(WITH_OPENGLES) && GL_ES_VERSION_3_2)
case GL_SAMPLER_BUFFER:
#endif
return GL_INT;
default:
LOGW("No available case to handle type: {}", type_);
return type_;
}
}
std::uint32_t GLUniform::GetComponentCount() const
{
switch (type_) {
case GL_FLOAT:
case GL_INT:
case GL_BOOL:
return 1;
case GL_FLOAT_VEC2:
case GL_INT_VEC2:
case GL_BOOL_VEC2:
return 2;
case GL_FLOAT_VEC3:
case GL_INT_VEC3:
case GL_BOOL_VEC3:
return 3;
case GL_FLOAT_VEC4:
case GL_INT_VEC4:
case GL_BOOL_VEC4:
return 4;
case GL_FLOAT_MAT2:
return 4;
case GL_FLOAT_MAT3:
return 9;
case GL_FLOAT_MAT4:
return 16;
#if !defined(WITH_OPENGLES) // not available in OpenGL ES
case GL_SAMPLER_1D:
#endif
case GL_SAMPLER_2D:
case GL_SAMPLER_3D:
case GL_SAMPLER_CUBE:
#if !defined(WITH_OPENGLES) || (defined(WITH_OPENGLES) && GL_ES_VERSION_3_2)
case GL_SAMPLER_BUFFER:
#endif
return 1;
default:
LOGW("No available case to handle type: {}", type_);
return 0;
}
}
bool GLUniform::HasReservedPrefix() const
{
return (MaxNameLength >= 3 && name_[0] == 'g' && name_[1] == 'l' && name_[2] == '_');
}
}
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