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Add cubemap textures

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This commit is contained in:
Nikita Lisitsa 2020-10-26 18:38:47 +03:00
parent d88799f308
commit 6b6d7687a9
2 changed files with 79 additions and 1 deletions
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60
libs/gfx/include/psemek/gfx/texture.hpp
View file

@ -66,7 +66,7 @@ namespace psemek::gfx
void repeat();
void clamp();
private:
protected:
GLuint id_;
geom::vector<std::size_t, D> size_;
@ -85,6 +85,64 @@ namespace psemek::gfx
extern template struct basic_texture<3, gl::TEXTURE_2D_ARRAY>;
extern template struct basic_texture<3, gl::TEXTURE_3D>;
extern template struct basic_texture<2, gl::TEXTURE_CUBE_MAP>;
struct texture_cubemap
: basic_texture<2, gl::TEXTURE_CUBE_MAP>
{
texture_cubemap() = default;
texture_cubemap(texture_cubemap &&) = default;
texture_cubemap & operator = (texture_cubemap &&) = default;
~texture_cubemap() = default;
texture_cubemap(texture_cubemap const &) = delete;
texture_cubemap & operator = (texture_cubemap const &) = delete;
static texture_cubemap null()
{
return basic_texture<2, gl::TEXTURE_CUBE_MAP>::null();
}
static GLenum face_to_gl(int f);
void load(int f, GLint internal_format, geom::vector<std::size_t, 2> const & size, GLenum format, GLenum type, const void * data);
template <typename Pixel>
void load(int f, geom::vector<std::size_t, 2> const & size, Pixel const * data = nullptr)
{
using traits = pixel_traits<Pixel>;
load(f, traits::internal_format, size, traits::format, traits::type, data);
}
template <typename Pixel>
void load(int f, util::array<Pixel, 2> const & p)
{
geom::vector<std::size_t, 2> size;
for (std::size_t i = 0; i < 2; ++i) size[i] = p.dim(i);
load(f, size, p.data());
}
void pixels(int f, GLenum format, GLenum type, void * data) const;
template <typename Pixmap>
Pixmap pixels(int f) const
{
using traits = pixel_traits<typename Pixmap::value_type>;
std::array<std::size_t, 2> size;
for (std::size_t i = 0; i < 2; ++i) size[i] = size_[i];
Pixmap p(size);
pixels(f, traits::format, traits::type, p.data());
return p;
}
private:
texture_cubemap(basic_texture<2, gl::TEXTURE_CUBE_MAP> t)
: basic_texture<2, gl::TEXTURE_CUBE_MAP>(std::move(t))
{}
};
namespace detail
{
std::optional<float> max_anisotropy();

20
libs/gfx/source/texture.cpp
View file

@ -10,6 +10,8 @@ namespace psemek::gfx
template struct basic_texture<3, gl::TEXTURE_2D_ARRAY>;
template struct basic_texture<3, gl::TEXTURE_3D>;
template struct basic_texture<2, gl::TEXTURE_CUBE_MAP>;
namespace detail
{
@ -31,4 +33,22 @@ namespace psemek::gfx
}
void texture_cubemap::load(int f, GLint internal_format, geom::vector<std::size_t, 2> const & size, GLenum format, GLenum type, const void * data)
{
bind();
gl::TexImage2D(face_to_gl(f), 0, internal_format, size[0], size[1], 0, format, type, data);
size_ = size;
}
void texture_cubemap::pixels(int f, GLenum format, GLenum type, void * data) const
{
bind();
gl::GetTexImage(face_to_gl(f), 0, format, type, data);
}
GLenum texture_cubemap::face_to_gl(int f)
{
return gl::TEXTURE_CUBE_MAP_POSITIVE_X + f;
}
}