+++ /dev/null
-#ifndef MSP_GL_TEXTURE_H_
-#define MSP_GL_TEXTURE_H_
-
-#include <msp/datafile/objectloader.h>
-#include <msp/graphics/image.h>
-#include "datatype.h"
-#include "gl.h"
-#include "pixelformat.h"
-#include "predicate.h"
-#include "resource.h"
-
-namespace Msp {
-namespace GL {
-
-enum TextureFilter
-{
- /// No filtering
- NEAREST = GL_NEAREST,
-
- /// Bilinear filtering
- LINEAR = GL_LINEAR,
-
- /// Mipmapping without filtering
- NEAREST_MIPMAP_NEAREST = GL_NEAREST_MIPMAP_NEAREST,
-
- /// Linear filtering between two mipmap levels
- NEAREST_MIPMAP_LINEAR = GL_NEAREST_MIPMAP_LINEAR,
-
- /// Bilinear filtering on the closest mipmap level
- LINEAR_MIPMAP_NEAREST = GL_LINEAR_MIPMAP_NEAREST,
-
- /// Trilinear filtering between two mipmap levels
- LINEAR_MIPMAP_LINEAR = GL_LINEAR_MIPMAP_LINEAR
-};
-
-
-enum TextureWrap
-{
- /// Tile the texture infinitely
- REPEAT = GL_REPEAT,
-
- /// Extend the texels at the edge of the texture to infinity
- CLAMP_TO_EDGE = GL_CLAMP_TO_EDGE,
-
- /// Tile the texture, with every other repetition mirrored
- MIRRORED_REPEAT = GL_MIRRORED_REPEAT
-};
-
-
-/**
-Base class for textures. This class only defines operations common for all
-texture types and is not instantiable. For specifying images for textures, see
-one of the dimensioned texture classes.
-
-A texture is generally rendered at a size that's either smaller or larger than
-its native size, so that the texture coordinates do not exactly correspond to
-the texels of the texture. The kind of filtering used, if any, is determined
-by the minification and magnification filter parameters. The default is LINEAR
-for magnification and NEAREST_MIPMAP_LINEAR for minification.
-
-When a mipmapped filter is in use, the texture consists of a stack of mipmap
-images. Level 0 is the base image. Each level above 0 has half the size of
-the previous level, rounded down and clamped to 1. The level with size 1 in
-all dimensions is the last mipmap level. All levels must be allocated for the
-texture to be usable.
-
-If texture coordinates fall outside of the principal range of the texture,
-wrapping is applied. The default for all directions is REPEAT.
-*/
-class Texture: public Resource
-{
-protected:
- class Loader: public DataFile::CollectionObjectLoader<Texture>
- {
- protected:
- bool srgb;
-
- public:
- Loader(Texture &);
- Loader(Texture &, Collection &);
- private:
- void init();
-
- void external_image(const std::string &);
- void filter(TextureFilter);
- void generate_mipmap(bool);
- void image_data(const std::string &);
- void mag_filter(TextureFilter);
- void max_anisotropy(float);
- void min_filter(TextureFilter);
- void wrap(TextureWrap);
- void wrap_r(TextureWrap);
- void wrap_s(TextureWrap);
- void wrap_t(TextureWrap);
- };
-
- enum ParameterMask
- {
- MIN_FILTER = 1,
- MAG_FILTER = 2,
- WRAP_S = 4,
- WRAP_T = 8,
- WRAP_R = 16,
- GENERATE_MIPMAP = 32,
- COMPARE = 64,
- COMPARE_FUNC = 128,
- MAX_ANISOTROPY = 256
- };
-
- unsigned id;
- GLenum target;
- TextureFilter min_filter;
- TextureFilter mag_filter;
- float max_anisotropy;
- TextureWrap wrap_s;
- TextureWrap wrap_t;
- TextureWrap wrap_r;
- bool gen_mipmap;
- bool compare;
- Predicate cmp_func;
- mutable int dirty_params;
-
- Texture(GLenum, ResourceManager * = 0);
- Texture(const Texture &);
- Texture &operator=(const Texture &);
-public:
- ~Texture();
-
-protected:
- static DataType get_alloc_type(PixelFormat);
-
- void update_parameter(int) const;
-public:
- void set_min_filter(TextureFilter);
- void set_mag_filter(TextureFilter);
-
- /** Sets filter for both minification and magnification. Since mipmapping
- is not applicable to magnification, LINEAR is used instead. */
- void set_filter(TextureFilter);
-
- void set_max_anisotropy(float);
-
- /** Sets the wrapping mode for all coordinates. */
- void set_wrap(TextureWrap);
-
- void set_wrap_s(TextureWrap);
- void set_wrap_t(TextureWrap);
- void set_wrap_r(TextureWrap);
-
- /** Sets automatic mipmap generation. If enabled, mipmaps are generated
- when a texture image is uploaded. */
- void set_generate_mipmap(bool);
-
-protected:
- void auto_generate_mipmap();
-
-public:
- /** Sets depth texture comparison. Has no effect on other formats. When
- comparison is enabled, the third component of the texture coordinate is
- compared against the texel value, and the result is returned as the texture
- sample. */
- void set_compare_enabled(bool);
-
- /** Sets the function to use for depth comparison. */
- void set_compare_func(Predicate);
-
- /// Loads a Graphics::Image from a file and uploads it to the texture.
- virtual void load_image(const std::string &, bool srgb = false);
-
- /** Uploads an image to the texture. If storage has not been defined, it
- will be set to match the image. Otherwise the image must be compatible
- with the defined storage. Semantics depend on the type of texture.
-
- If srgb is true and storage is determined by this call, then an sRGB pixel
- format will be used. */
- virtual void image(const Graphics::Image &, bool srgb = false) = 0;
-
- GLenum get_target() const { return target; }
- unsigned get_id() const { return id; }
-
- void bind() const { bind_to(0); }
- void bind_to(unsigned) const;
-
- static const Texture *current(unsigned = 0);
- static void unbind() { unbind_from(0); }
- static void unbind_from(unsigned);
-
- virtual UInt64 get_data_size() const { return 0; }
-};
-
-} // namespace GL
-} // namespace Msp
-
-#endif
projects / libs / gl.git / blobdiff