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Diffstat (limited to 'src/lib/util/bitmap.h')
-rw-r--r-- | src/lib/util/bitmap.h | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/src/lib/util/bitmap.h b/src/lib/util/bitmap.h new file mode 100644 index 00000000000..5b4a5badbd0 --- /dev/null +++ b/src/lib/util/bitmap.h @@ -0,0 +1,169 @@ +/*************************************************************************** + + bitmap.h + + Core bitmap routines. + + Copyright (c) 1996-2007, Nicola Salmoria and the MAME Team. + Visit http://mamedev.org for licensing and usage restrictions. + +***************************************************************************/ + +#pragma once + +#ifndef __BITMAP_H__ +#define __BITMAP_H__ + +#include "osdcore.h" +#include "palette.h" + + +/*************************************************************************** + TYPE DEFINITIONS +***************************************************************************/ + +/* bitmap_format describes the various bitmap formats we use */ +enum _bitmap_format +{ + BITMAP_FORMAT_INVALID = 0, /* invalid format */ + BITMAP_FORMAT_INDEXED8, /* 8bpp indexed */ + BITMAP_FORMAT_INDEXED16, /* 16bpp indexed */ + BITMAP_FORMAT_INDEXED32, /* 32bpp indexed */ + BITMAP_FORMAT_RGB15, /* 15bpp 5-5-5 RGB */ + BITMAP_FORMAT_RGB32, /* 32bpp 8-8-8 RGB */ + BITMAP_FORMAT_ARGB32, /* 32bpp 8-8-8-8 ARGB */ + BITMAP_FORMAT_YUY16, /* 16bpp 8-8 Y/Cb, Y/Cr in sequence */ + BITMAP_FORMAT_LAST +}; +typedef enum _bitmap_format bitmap_format; + + +/* rectangles describe a bitmap portion */ +typedef struct _rectangle rectangle; +struct _rectangle +{ + int min_x; /* minimum X, or left coordinate */ + int max_x; /* maximum X, or right coordinate (inclusive) */ + int min_y; /* minimum Y, or top coordinate */ + int max_y; /* maximum Y, or bottom coordinate (inclusive) */ +}; + + +/* bitmaps describe a rectangular array of pixels */ +typedef struct _bitmap_t bitmap_t; +struct _bitmap_t +{ + void * alloc; /* pointer to allocated pixel memory */ + void * base; /* pointer to pixel (0,0) (adjusted for padding) */ + int rowpixels; /* pixels per row (including padding) */ + int width; /* width of the bitmap */ + int height; /* height of the bitmap */ + bitmap_format format; /* format of the bitmap */ + int bpp; /* bits per pixel */ + palette_t * palette; /* optional palette */ +}; + + + +/*************************************************************************** + MACROS +***************************************************************************/ + +/* Macros for accessing bitmap pixels */ +#define BITMAP_ADDR(bitmap, type, y, x) \ + ((type *)(bitmap)->base + (y) * (bitmap)->rowpixels + (x)) + +#define BITMAP_ADDR8(bitmap, y, x) BITMAP_ADDR(bitmap, UINT8, y, x) +#define BITMAP_ADDR16(bitmap, y, x) BITMAP_ADDR(bitmap, UINT16, y, x) +#define BITMAP_ADDR32(bitmap, y, x) BITMAP_ADDR(bitmap, UINT32, y, x) + + + +/*************************************************************************** + FUNCTION PROTOTYPES +***************************************************************************/ + + +/* ----- bitmap allocation ----- */ + +/* allocate a new bitmap of the given dimensions and format */ +bitmap_t *bitmap_alloc(int width, int height, bitmap_format format); + +/* allocate a new bitmap with additional slop on the borders */ +bitmap_t *bitmap_alloc_slop(int width, int height, int xslop, int yslop, bitmap_format format); + +/* wrap a bitmap object around an existing array of data */ +bitmap_t *bitmap_wrap(void *base, int width, int height, int rowpixels, bitmap_format format); + +/* associate a palette with a bitmap */ +void bitmap_set_palette(bitmap_t *bitmap, palette_t *palette); + +/* free allocated data for a bitmap */ +void bitmap_free(bitmap_t *bitmap); + + + +/* ----- bitmap drawing ----- */ + +/* fill a bitmap with a single color, clipping to the given rectangle */ +void bitmap_fill(bitmap_t *dest, const rectangle *clip, rgb_t color); + + + +/* ----- bitmap utilities ----- */ + +/* return the number of bits per pixel for a given bitmap format */ +int bitmap_format_to_bpp(bitmap_format format); + + + + +/*************************************************************************** + INLINE FUNCTIONS +***************************************************************************/ + +/*------------------------------------------------- + sect_rect - compute the intersection of two + rectangles +-------------------------------------------------*/ + +INLINE void sect_rect(rectangle *dst, const rectangle *src) +{ + if (src->min_x > dst->min_x) dst->min_x = src->min_x; + if (src->max_x < dst->max_x) dst->max_x = src->max_x; + if (src->min_y > dst->min_y) dst->min_y = src->min_y; + if (src->max_y < dst->max_y) dst->max_y = src->max_y; +} + + +/*------------------------------------------------- + union_rect - compute the union of two + rectangles +-------------------------------------------------*/ + +INLINE void union_rect(rectangle *dst, const rectangle *src) +{ + if (src->min_x < dst->min_x) dst->min_x = src->min_x; + if (src->max_x > dst->max_x) dst->max_x = src->max_x; + if (src->min_y < dst->min_y) dst->min_y = src->min_y; + if (src->max_y > dst->max_y) dst->max_y = src->max_y; +} + + +/*------------------------------------------------- + plot_box - draw a filled rectangle into a + bitmap of arbitrary depth +-------------------------------------------------*/ + +INLINE void plot_box(bitmap_t *bitmap, int x, int y, int width, int height, UINT32 color) +{ + rectangle clip; + clip.min_x = x; + clip.min_y = y; + clip.max_x = x + width - 1; + clip.max_y = y + height - 1; + bitmap_fill(bitmap, &clip, color); +} + + +#endif /* __BITMAP_H__ */ |