142 lines
4.1 KiB
C
142 lines
4.1 KiB
C
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#ifndef __al_included_allegro5_aintern_bitmap_h
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#define __al_included_allegro5_aintern_bitmap_h
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#include "allegro5/bitmap.h"
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#include "allegro5/bitmap_lock.h"
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#include "allegro5/display.h"
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#include "allegro5/transformations.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct ALLEGRO_BITMAP_INTERFACE ALLEGRO_BITMAP_INTERFACE;
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struct ALLEGRO_BITMAP
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{
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ALLEGRO_BITMAP_INTERFACE *vt;
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ALLEGRO_DISPLAY *display;
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int format;
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int flags;
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int w, h;
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/*
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* The number of bytes between a pixel at (x,y) and (x,y+1).
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* This is larger than w * pixel_size if there is padding between lines.
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*/
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int pitch;
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/*
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* clip left, right, top, bottom
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* Clip anything outside of this. cr/cb are exclusive, that is (0, 0, 1, 1)
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* is the single pixel spawning a rectangle from floating point 0/0 to 1/1 -
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* or in other words, the single pixel 0/0.
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*
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* There is always confusion as to whether cr/cb are exclusive, leading to
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* subtle bugs. The suffixes are supposed to help with that.
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*/
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int cl;
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int cr_excl;
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int ct;
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int cb_excl;
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/*
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* Locking info.
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*
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* locked - locked or not?
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* lock_x/y - top left of the locked region
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* lock_w/h - width and height of the locked region
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* lock_flags - flags the region was locked with
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* locked_region - a copy of the locked rectangle
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*/
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bool locked;
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int lock_x;
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int lock_y;
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int lock_w;
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int lock_h;
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int lock_flags;
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ALLEGRO_LOCKED_REGION locked_region;
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/* Transformation for this bitmap */
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ALLEGRO_TRANSFORM transform;
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/* Info for sub-bitmaps */
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ALLEGRO_BITMAP *parent;
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int xofs;
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int yofs;
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/* A memory copy of the bitmap data. May be NULL for an empty bitmap. */
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unsigned char *memory;
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/* Size of the bitmap object. Used only by functions to convert bitmap
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storage type. Can be missleading. */
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size_t size;
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bool preserve_texture;
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};
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struct ALLEGRO_BITMAP_INTERFACE
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{
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int id;
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void (*draw_bitmap_region)(ALLEGRO_BITMAP *bitmap,
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ALLEGRO_COLOR tint,float sx, float sy,
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float sw, float sh, int flags);
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/* After the memory-copy of the bitmap has been modified, need to call this
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* to update the display-specific copy. E.g. with an OpenGL driver, this
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* might create/update a texture. Returns false on failure.
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*/
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bool (*upload_bitmap)(ALLEGRO_BITMAP *bitmap);
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/* If the display version of the bitmap has been modified, use this to update
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* the memory copy accordingly. E.g. with an OpenGL driver, this might
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* read the contents of an associated texture.
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*/
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void (*update_clipping_rectangle)(ALLEGRO_BITMAP *bitmap);
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void (*destroy_bitmap)(ALLEGRO_BITMAP *bitmap);
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ALLEGRO_LOCKED_REGION * (*lock_region)(ALLEGRO_BITMAP *bitmap,
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int x, int y, int w, int h, int format,
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int flags);
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void (*unlock_region)(ALLEGRO_BITMAP *bitmap);
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};
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extern void (*_al_convert_funcs[ALLEGRO_NUM_PIXEL_FORMATS]
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[ALLEGRO_NUM_PIXEL_FORMATS])(void *, int, void *, int,
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int, int, int, int, int, int);
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/* Bitmap conversion */
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void _al_convert_bitmap_data(
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void *src, int src_format, int src_pitch,
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void *dst, int dst_format, int dst_pitch,
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int sx, int sy, int dx, int dy,
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int width, int height);
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void _al_convert_to_memory_bitmap(ALLEGRO_BITMAP *bitmap);
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void _al_convert_to_display_bitmap(ALLEGRO_BITMAP *bitmap);
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#ifdef ALLEGRO_GP2XWIZ
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/* Optimized blitters */
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void _al_draw_bitmap_region_optimized_rgba_4444_to_rgb_565(
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ALLEGRO_BITMAP *src, int sx, int sy, int sw, int sh,
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ALLEGRO_BITMAP *dest, int dx, int dy, int flags);
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void _al_draw_bitmap_region_optimized_rgb_565_to_rgb_565(
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ALLEGRO_BITMAP *src, int sx, int sy, int sw, int sh,
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ALLEGRO_BITMAP *dest, int dx, int dy, int flags);
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void _al_draw_bitmap_region_optimized_rgba_4444_to_rgba_4444(
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ALLEGRO_BITMAP *src, int sx, int sy, int sw, int sh,
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ALLEGRO_BITMAP *dest, int dx, int dy, int flags);
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#endif
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/* Simple bitmap drawing */
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/* _al_put_pixel was inadvertently exported in 5.0.x releases. */
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AL_FUNC(void, _al_put_pixel, (ALLEGRO_BITMAP *bitmap, int x, int y, ALLEGRO_COLOR color));
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/* Bitmap I/O */
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void _al_init_iio_table(void);
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#ifdef __cplusplus
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}
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#endif
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#endif
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