1 #include <msp/gl/extensions/arb_direct_state_access.h>
2 #include <msp/gl/extensions/arb_texture_storage.h>
3 #include <msp/gl/extensions/ext_texture3d.h>
4 #include <msp/gl/extensions/ext_texture_array.h>
7 #include "texture3d_backend.h"
12 OpenGLTexture3D::OpenGLTexture3D():
13 Texture(GL_TEXTURE_3D)
15 static Require _req(EXT_texture3D);
18 OpenGLTexture3D::OpenGLTexture3D(unsigned t):
22 void OpenGLTexture3D::allocate()
24 const Texture3D &self = *static_cast<const Texture3D *>(this);
29 GLenum gl_fmt = get_gl_pixelformat(storage_fmt);
30 if(ARB_texture_storage)
32 if(ARB_direct_state_access)
33 glTextureStorage3D(id, n_levels, gl_fmt, self.width, self.height, self.depth);
37 glTexStorage3D(target, n_levels, gl_fmt, self.width, self.height, self.depth);
43 GLenum comp = get_gl_components(get_components(storage_fmt));
44 GLenum type = get_gl_type(get_component_type(storage_fmt));
45 for(unsigned i=0; i<n_levels; ++i)
47 auto lv_size = self.get_level_size(i);
48 glTexImage3D(target, i, gl_fmt, lv_size.x, lv_size.y, lv_size.z, 0, comp, type, 0);
50 glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, n_levels-1);
56 void OpenGLTexture3D::sub_image(unsigned level, int x, int y, int z, unsigned wd, unsigned ht, unsigned dp, const void *data)
58 GLenum comp = get_gl_components(get_components(storage_fmt));
59 GLenum type = get_gl_type(get_component_type(storage_fmt));
60 if(ARB_direct_state_access)
61 glTextureSubImage3D(id, level, x, y, z, wd, ht, dp, comp, type, data);
65 glTexSubImage3D(target, level, x, y, z, wd, ht, dp, comp, type, data);
69 bool OpenGLTexture3D::is_array() const
71 return target==GL_TEXTURE_2D_ARRAY;
74 size_t OpenGLTexture3D::get_data_size() const
79 const Texture3D &self = *static_cast<const Texture3D *>(this);
81 size_t level_size = self.width*self.height*self.depth*get_pixel_size(format);
82 size_t total_size = level_size;
83 for(unsigned i=0; i<n_levels; ++i, level_size>>=2)
84 total_size += level_size;