#ifndef MSP_GL_TEXTURECUBE_H_
#define MSP_GL_TEXTURECUBE_H_
-#include <msp/gl/extensions/arb_texture_cube_map.h>
#include <msp/graphics/image.h>
-#include "texture.h"
+#include "texturecube_backend.h"
#include "vector.h"
namespace Msp {
enum TextureCubeFace
{
- POSITIVE_X = GL_TEXTURE_CUBE_MAP_POSITIVE_X,
- NEGATIVE_X = GL_TEXTURE_CUBE_MAP_NEGATIVE_X,
- POSITIVE_Y = GL_TEXTURE_CUBE_MAP_POSITIVE_Y,
- NEGATIVE_Y = GL_TEXTURE_CUBE_MAP_NEGATIVE_Y,
- POSITIVE_Z = GL_TEXTURE_CUBE_MAP_POSITIVE_Z,
- NEGATIVE_Z = GL_TEXTURE_CUBE_MAP_NEGATIVE_Z
+ POSITIVE_X = 0,
+ NEGATIVE_X = 1,
+ POSITIVE_Y = 2,
+ NEGATIVE_Y = 3,
+ POSITIVE_Z = 4,
+ NEGATIVE_Z = 5
};
/**
Requires OpenGL version 1.3.
*/
-class TextureCube: public Texture
+class TextureCube: public TextureCubeBackend
{
+ friend TextureCubeBackend;
+
public:
class Loader: public Msp::DataFile::DerivedObjectLoader<TextureCube, Texture::Loader>
{
};
private:
- unsigned size;
- unsigned levels;
- /* Lowest six bits track allocation status of faces on the base level. Bit
- seven is set if the entire base level is allocated. */
- unsigned allocated;
+ unsigned size = 0;
+ unsigned levels = 0;
- static TextureCubeFace face_order[6];
- static Vector3 directions[6];
- static unsigned orientations[12];
+ static const Vector3 directions[6];
+ static const unsigned orientations[12];
public:
- TextureCube();
-
/** Defines storage structure for the texture. If lv is zero, the number
of mipmap levels is automatically determined from storage dimensions.
it can't be changed. */
void storage(PixelFormat fmt, unsigned size, unsigned lv = 0);
- /** Allocates storage for the cube faces. The contents are initially
- undefined. If storage has already been allocated, does nothing. */
- void allocate(unsigned level);
-
/** Updates the contents of a face. Storage must be defined beforehand.
The image data must have dimensions and format matching the defined
storage. */
unsigned get_level_size(unsigned) const;
public:
- /** Translates indices into face constants. Valid indices are between 0
- and 5, inclusive. */
- static TextureCubeFace enumerate_faces(unsigned);
-
- static unsigned get_face_index(TextureCubeFace);
-
/** Returns a vector pointing out of the face. */
static const Vector3 &get_face_direction(TextureCubeFace);