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#include "GLAttribute.h"
#include "GLDebug.h"
#include "../../../Main.h"
namespace nCine
{
GLAttribute::GLAttribute()
: location_(-1), size_(0), type_(GL_FLOAT)
{
name_[0] = '\0';
}
GLAttribute::GLAttribute(GLuint program, GLuint index)
: location_(-1), size_(0), type_(GL_FLOAT)
{
GLsizei length;
glGetActiveAttrib(program, index, MaxNameLength, &length, &size_, &type_, name_);
DEATH_ASSERT(length <= MaxNameLength);
if (!HasReservedPrefix()) {
location_ = glGetAttribLocation(program, name_);
if (location_ == -1) {
LOGW("Attribute location not found for attribute \"{}\" ({}) in shader program {}", name_, index, program);
}
}
GL_LOG_ERRORS();
}
GLenum GLAttribute::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_UNSIGNED_INT:
case GL_UNSIGNED_INT_VEC2:
case GL_UNSIGNED_INT_VEC3:
case GL_UNSIGNED_INT_VEC4:
return GL_UNSIGNED_INT;
default:
LOGW("No available case to handle type: {}", type_);
return type_;
}
}
std::int32_t GLAttribute::GetComponentCount() const
{
switch (type_) {
case GL_BYTE:
case GL_UNSIGNED_BYTE:
case GL_SHORT:
case GL_UNSIGNED_SHORT:
return 1;
case GL_FLOAT:
case GL_INT:
case GL_BOOL:
case GL_UNSIGNED_INT:
return 1;
case GL_FLOAT_VEC2:
case GL_INT_VEC2:
case GL_BOOL_VEC2:
case GL_UNSIGNED_INT_VEC2:
return 2;
case GL_FLOAT_VEC3:
case GL_INT_VEC3:
case GL_BOOL_VEC3:
case GL_UNSIGNED_INT_VEC3:
return 3;
case GL_FLOAT_VEC4:
case GL_INT_VEC4:
case GL_BOOL_VEC4:
case GL_UNSIGNED_INT_VEC4:
return 4;
default:
LOGW("No available case to handle type: {}", type_);
return 0;
}
}
bool GLAttribute::HasReservedPrefix() const
{
return (MaxNameLength >= 3 && name_[0] == 'g' && name_[1] == 'l' && name_[2] == '_');
}
}
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