#include <string>
#include <msp/graphics/image.h>
-#include "datatype.h"
-#include "pixelformat.h"
#include "texture.h"
namespace Msp {
namespace GL {
/**
-Two-dimensional texture class. This is the most common type of texture.
+Two-dimensional texture. Consists of an array of texels in the shape of a
+rectangle. Texture coordinate have a range of [0, 1]. Coordinates outside of
+this range are subject to wrapping. This is the most common type of texture.
*/
class Texture2D: public Texture
{
public:
- class Loader: public Texture::Loader
+ class Loader: public Msp::DataFile::DerivedObjectLoader<Texture2D, Texture::Loader>
{
public:
Loader(Texture2D &);
+ Loader(Texture2D &, Collection &);
private:
- void image_data(const std::string &);
+ void init();
+
void raw_data(const std::string &);
void storage(PixelFormat, unsigned, unsigned);
- void storage_b(PixelFormat, unsigned, unsigned, unsigned);
};
private:
- PixelFormat ifmt;
+ class AsyncLoader;
+
unsigned width;
unsigned height;
+ unsigned levels;
unsigned allocated;
public:
- Texture2D();
+ Texture2D(ResourceManager * = 0);
+ virtual ~Texture2D();
+
+ /** Defines storage structure for the texture. If lv is zero, the number
+ of mipmap levels is automatically determined from storage dimensions.
- /**
- Defines the texture storage. This function may only be successfully called
- once.
- */
- void storage(PixelFormat fmt, unsigned wd, unsigned ht);
+ Must be called before an image can be uploaded. Once storage is defined,
+ it can't be changed. */
+ void storage(PixelFormat fmt, unsigned wd, unsigned ht, unsigned lv = 0);
- /** Allocates texture storage. If storage has already been allocated, this
- function does nothing. */
+ /** Allocates storage for the texture. The contents are initially
+ undefined. If storage has already been allocated, does nothing. */
void allocate(unsigned level);
-
- /** Uploads an image to the texture. storage() must have been called prior to
- this, and the image must have dimensions conforming to the specified
- storage. For level>0, mipmapping rules apply to the image dimensions. */
+
+ /** Uploads an image to the texture. Storage must be defined beforehand.
+ The image data must have dimensions and format compatible with the defined
+ storage. */
void image(unsigned level, PixelFormat fmt, DataType type, const void *data);
- /**
- Uploads a sub-image into the texture. Unlike full image upload, there are
- no constraints on the size of the sub-image.
- */
- void sub_image(unsigned level, int x, int y, unsigned wd, unsigned ht, PixelFormat fmt, DataType type, const void *data);
+ /** Updates a rectangular region of the texture. Storage must be defined
+ and allocated beforehand. The update region must be fully inside the
+ texture. */
+ void sub_image(unsigned level, int x, int y, unsigned wd, unsigned ht,
+ PixelFormat fmt, DataType type, const void *data);
+
+ /** 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.
- /**
- Loads an image from a file and uploads it to the texture. If storage() has
- not been called, the storage format will be set to match the loaded image.
- */
- void load_image(const std::string &fn);
+ 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);
- unsigned get_width() const { return width; }
+private:
+ void image(const Graphics::Image &, bool, bool);
+
+public:
+ unsigned get_width() const { return width; }
unsigned get_height() const { return height; }
private:
- void image(const Graphics::Image &);
- void get_level_size(unsigned, unsigned &, unsigned &);
+ unsigned get_n_levels() const;
+ void get_level_size(unsigned, unsigned &, unsigned &) const;
+
+public:
+ virtual Resource::AsyncLoader *load(IO::Seekable &, const Resources * = 0);
+ virtual UInt64 get_data_size() const;
+ virtual void unload();
};
} // namespace GL