/// Guards
#ifndef GLTRAITS_HPP_
#define GLTRAITS_HPP_
/// Includes
#include <cstddef>
#include <glbase.hpp>
/// GLTraits
class GLTraits
{
public:
//// Value
template<typename>
struct Value;
template<GLenum id>
struct ValueID;
};
//// Helpers
#define GLTRAITS_KEEP(...) __VA_ARGS__
#define GLTRAITS_OMIT(...)
//// Value
#define GLTRAITS_VALUE_SRED GL_SR8_EXT
#define GLTRAITS_VALUE_SRG GL_SRG8_EXT
#define GLTRAITS_VALUE_SRGB GL_SRGB8
#define GLTRAITS_VALUE_SRGBA GL_SRGB8_ALPHA8
#define GLTRAITS_VALUE_COMPRESSED_SRED GL_COMPRESSED_SRGB
#define GLTRAITS_VALUE_COMPRESSED_SRG GL_COMPRESSED_SRGB
#define GLTRAITS_VALUE_COMPRESSED_SRGB GL_COMPRESSED_SRGB
#define GLTRAITS_VALUE_COMPRESSED_SRGBA GL_COMPRESSED_SRGB_ALPHA
#define GLTRAITS_VALUE( \
VALUE, \
COLUMNS, ROWS, \
GLSL, FORMAT, TYPE, INTERNAL_FORMAT, \
OFFSET_ARGS, PTR, \
V, UNIFORM, SUFFIX, ATTRIB, \
INTEGER, \
NORMALIZE_ARGS, \
V1U, V2U, \
V1A, V2A, \
EXTU, EXTA, \
... \
) \
template<> \
struct GLTraits::Value<VALUE> \
{ \
auto static constexpr name = #VALUE; \
auto static constexpr columns = GLint{COLUMNS}; \
auto static constexpr rows = GLint{ROWS}; \
auto static constexpr glsl = GLenum{GL_##GLSL}; \
auto static constexpr format = GLenum{GL_##FORMAT##INTEGER}; \
auto static constexpr type = GLenum{GL_##TYPE}; \
auto static constexpr internal_format = GLenum{GL_##INTERNAL_FORMAT}; \
auto static constexpr internal_format_srgb = GLenum{GLTRAITS_VALUE_S##FORMAT}; \
auto static constexpr internal_format_compressed = GLenum{GL_COMPRESSED_##FORMAT}; \
auto static constexpr internal_format_compressed_srgb = GLenum{GLTRAITS_VALUE_COMPRESSED_S##FORMAT}; \
auto static constexpr integer = bool(*#INTEGER); \
auto static constexpr id = \
(glsl == GL_INT || glsl == GL_UNSIGNED_INT) && \
sizeof(VALUE) < sizeof(GLint) \
? type \
: glsl; \
void static uniform(GLint location, VALUE const & value) \
{ \
if (GLBase::debug() >= 1) \
GLBase::check_supported({V1U, V2U}, EXTU); \
glUniform##UNIFORM##ROWS##SUFFIX##V( \
location, \
__VA_ARGS__ \
PTR(value) \
); \
} \
void static vertex_attrib(GLint location, VALUE const & value) \
{ \
if (GLBase::debug() >= 1) \
GLBase::check_supported({V1A, V2A}, EXTA); \
if (location == -1) \
return; \
for (auto column = GLuint{0}; column < columns; ++column) \
glVertexAttrib##ATTRIB##ROWS##SUFFIX##V( \
(GLuint)location + column, \
PTR(value) GLTRAITS_##OFFSET_ARGS(+ rows * column) \
); \
} \
void static vertex_attrib_pointer( \
GLint location, \
std::size_t offset = 0, \
std::size_t stride = sizeof(VALUE) \
) \
{ \
if (GLBase::debug() >= 1) \
GLBase::check_supported({V1A, V2A}, EXTA); \
if (location == -1) \
return; \
auto constexpr sizeof_column = sizeof(VALUE) / columns; \
for (auto column = GLuint{0}; column < columns; ++column) \
glVertexAttrib##ATTRIB##Pointer( \
(GLuint)location + column, \
rows, \
type, \
GLTRAITS_##NORMALIZE_ARGS(GL_FALSE,) \
(GLsizei)stride, \
(void const *)(offset + sizeof_column * column) \
); \
} \
}; \
template<> \
struct GLTraits::ValueID<GLTraits::Value<VALUE>::id> \
{ \
using Value = VALUE; \
};
#define GLTRAITS_VALUE_SCALAR( VALUE, TYPE, GLSL, INTERNAL, ...) GLTRAITS_VALUE(VALUE, 1, 1, GLSL, RED, TYPE, R ##INTERNAL, OMIT, , , , __VA_ARGS__,)
#define GLTRAITS_VALUE_VECTOR_N( N, FORMAT, VALUE, TYPE, PTR, INTERNAL, ...) GLTRAITS_VALUE(VALUE##N, 1, N, TYPE##_VEC##N, FORMAT, TYPE, FORMAT##INTERNAL, KEEP, PTR, v, , __VA_ARGS__, 1,)
#define GLTRAITS_VALUE_MATRIX_N( N, FORMAT, VALUE, TYPE, PTR, T, INTERNAL, ...) GLTRAITS_VALUE(VALUE##N, N, N, TYPE##_MAT##N, FORMAT, TYPE, FORMAT##INTERNAL, KEEP, PTR, v, Matrix, __VA_ARGS__, 1, T,)
#define GLTRAITS_VALUE_MATRIX_N_M(N, M, FORMAT, VALUE, TYPE, PTR, T, INTERNAL, ...) GLTRAITS_VALUE(VALUE##N##x##M, N, M, TYPE##_MAT##N##x##M, FORMAT, TYPE, FORMAT##INTERNAL, KEEP, PTR, v, Matrix##N##x, __VA_ARGS__, 1, T,)
#define GLTRAITS_VALUE_VECTOR(...) \
GLTRAITS_VALUE_VECTOR_N( 2, RG, __VA_ARGS__) \
GLTRAITS_VALUE_VECTOR_N( 3, RGB, __VA_ARGS__) \
GLTRAITS_VALUE_VECTOR_N( 4, RGBA, __VA_ARGS__)
#define GLTRAITS_VALUE_MATRIX_(SUPPORT_ARGS, ...) \
GLTRAITS_VALUE_MATRIX_N( 2, RG, __VA_ARGS__ GLTRAITS_##SUPPORT_ARGS(, 2, 0, 2, 0, {}, {})) \
GLTRAITS_VALUE_MATRIX_N_M(2, 3, RGB, __VA_ARGS__ GLTRAITS_##SUPPORT_ARGS(, 2, 1, 2, 0, {}, {})) \
GLTRAITS_VALUE_MATRIX_N_M(2, 4, RGBA, __VA_ARGS__ GLTRAITS_##SUPPORT_ARGS(, 2, 1, 2, 0, {}, {})) \
GLTRAITS_VALUE_MATRIX_N_M(3, 2, RG, __VA_ARGS__ GLTRAITS_##SUPPORT_ARGS(, 2, 1, 2, 0, {}, {})) \
GLTRAITS_VALUE_MATRIX_N( 3, RGB, __VA_ARGS__ GLTRAITS_##SUPPORT_ARGS(, 2, 0, 2, 0, {}, {})) \
GLTRAITS_VALUE_MATRIX_N_M(3, 4, RGBA, __VA_ARGS__ GLTRAITS_##SUPPORT_ARGS(, 2, 1, 2, 0, {}, {})) \
GLTRAITS_VALUE_MATRIX_N_M(4, 2, RG, __VA_ARGS__ GLTRAITS_##SUPPORT_ARGS(, 2, 1, 2, 0, {}, {})) \
GLTRAITS_VALUE_MATRIX_N_M(4, 3, RGB, __VA_ARGS__ GLTRAITS_##SUPPORT_ARGS(, 2, 1, 2, 0, {}, {})) \
GLTRAITS_VALUE_MATRIX_N( 4, RGBA, __VA_ARGS__ GLTRAITS_##SUPPORT_ARGS(, 2, 0, 2, 0, {}, {}))
#define GLTRAITS_VALUE_MATRIXS(...) GLTRAITS_VALUE_MATRIX_(KEEP, __VA_ARGS__)
#define GLTRAITS_VALUE_MATRIX(...) GLTRAITS_VALUE_MATRIX_(OMIT, __VA_ARGS__)
GLTRAITS_VALUE_SCALAR( GLfloat, FLOAT, FLOAT, 32F, f, , , KEEP, 2, 0, 2, 0, {}, {})
GLTRAITS_VALUE_SCALAR( bool, BYTE, BOOL, 8I, i, I, _INTEGER, OMIT, 2, 0, 3, 0, {}, {})
GLTRAITS_VALUE_SCALAR( GLbyte, BYTE, INT, 8I, i, I, _INTEGER, OMIT, 2, 0, 3, 0, {}, {})
GLTRAITS_VALUE_SCALAR( GLshort, SHORT, INT, 16I, i, I, _INTEGER, OMIT, 2, 0, 3, 0, {}, {})
GLTRAITS_VALUE_SCALAR( GLint, INT, INT, 32I, i, I, _INTEGER, OMIT, 2, 0, 3, 0, {}, {})
GLTRAITS_VALUE_SCALAR( GLubyte, UNSIGNED_BYTE, UNSIGNED_INT, 8UI, ui, I, _INTEGER, OMIT, 3, 0, 3, 0, {}, {})
GLTRAITS_VALUE_SCALAR( GLushort, UNSIGNED_SHORT, UNSIGNED_INT, 16UI, ui, I, _INTEGER, OMIT, 3, 0, 3, 0, {}, {})
GLTRAITS_VALUE_SCALAR( GLuint, UNSIGNED_INT, UNSIGNED_INT, 32UI, ui, I, _INTEGER, OMIT, 3, 0, 3, 0, {}, {})
GLTRAITS_VALUE_SCALAR( GLdouble, DOUBLE, DOUBLE, ED, d, L, , OMIT, 4, 0, 4, 1, "GL_ARB_gpu_shader_fp64", "GL_ARB_vertex_attrib_64bit")
#ifdef GLM_VERSION
#include <glm/gtc/type_ptr.hpp>
GLTRAITS_VALUE_VECTOR( glm::vec, FLOAT, glm::value_ptr, 32F, f, , , KEEP, 2, 0, 2, 0, {}, {})
GLTRAITS_VALUE_MATRIXS(glm::mat, FLOAT, glm::value_ptr, GL_FALSE, 32F, f, , , KEEP)
GLTRAITS_VALUE_VECTOR( glm::ivec, INT, glm::value_ptr, 32I, i, I, _INTEGER, OMIT, 2, 0, 3, 0, {}, {})
GLTRAITS_VALUE_VECTOR( glm::uvec, UNSIGNED_INT, glm::value_ptr, 32UI, ui, I, _INTEGER, OMIT, 3, 0, 3, 0, {}, {})
GLTRAITS_VALUE_VECTOR( glm::dvec, DOUBLE, glm::value_ptr, , d, L, , OMIT, 4, 0, 4, 1, "GL_ARB_gpu_shader_fp64", "GL_ARB_vertex_attrib_64bit")
GLTRAITS_VALUE_MATRIX( glm::dmat, DOUBLE, glm::value_ptr, GL_FALSE, , d, L, , OMIT, 4, 0, 4, 1, "GL_ARB_gpu_shader_fp64", "GL_ARB_vertex_attrib_64bit")
#endif
/// Guards
#endif
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