188 lines
6.1 KiB
C
188 lines
6.1 KiB
C
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/* Graphics Library headerfile */
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#ifndef VGAGL_H
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#define VGAGL_H
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/* Graphics context */
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#define CONTEXT_VIRTUAL 0x0
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#define CONTEXT_PAGED 0x1
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#define CONTEXT_LINEAR 0x2
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#define CONTEXT_MODEX 0x3
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#define CONTEXT_PLANAR16 0x4
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#define MODEFLAG_PAGEFLIPPING_CAPABLE 0x01
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#define MODEFLAG_TRIPLEBUFFERING_CAPABLE 0x02
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#define MODEFLAG_PAGEFLIPPING_ENABLED 0x04
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#define MODEFLAG_TRIPLEBUFFERING_ENABLED 0x08
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#define MODEFLAG_FLIPPAGE_BANKALIGNED 0x10
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/*
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* The next two can never occur together, thus we use the same flag
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* (as svgalib does).
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*/
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#define MODEFLAG_32BPP_SHIFT8 0x20
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#define MODEFLAG_24BPP_REVERSED 0x20
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typedef struct {
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void (*driver_setpixel_func) (int, int, int);
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int (*driver_getpixel_func) (int, int);
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void (*driver_hline_func) (int, int, int, int);
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void (*driver_fillbox_func) (int, int, int, int, int);
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void (*driver_putbox_func) (int, int, int, int, void *, int);
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void (*driver_getbox_func) (int, int, int, int, void *, int);
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void (*driver_putboxmask_func) (int, int, int, int, void *);
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void (*driver_putboxpart_func) (int, int, int, int, int, int, void *,
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int, int);
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void (*driver_getboxpart_func) (int, int, int, int, int, int, void *,
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int, int);
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void (*driver_copybox_func) (int, int, int, int, int, int);
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} framebufferfunctions;
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typedef struct {
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unsigned char modetype; /* virtual, paged, linear, mode X */
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unsigned char modeflags; /* or planar16 */
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unsigned char dummy;
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unsigned char flippage;
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int width; /* width in pixels */
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int height; /* height in pixels */
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int bytesperpixel; /* bytes per pixel (1, 2, 3, or 4) */
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int colors; /* number of colors */
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int bitsperpixel; /* bits per pixel (8, 15, 16 or 24) */
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int bytewidth; /* length of a scanline in bytes */
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char *vbuf; /* address of framebuffer */
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int clip; /* clipping enabled? */
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int clipx1; /* top-left coordinate of clip window */
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int clipy1;
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int clipx2; /* bottom-right coordinate of clip window */
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int clipy2;
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framebufferfunctions ff;
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} GraphicsContext;
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extern GraphicsContext currentcontext;
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#define BYTESPERPIXEL (currentcontext.bytesperpixel)
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#define BYTEWIDTH (currentcontext.bytewidth)
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#define WIDTH (currentcontext.width)
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#define HEIGHT (currentcontext.height)
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#define VBUF (currentcontext.vbuf)
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#define MODETYPE (currentcontext.modetype)
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#define MODEFLAGS (currentcontext.modeflags)
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#define BITSPERPIXEL (currentcontext.bitsperpixel)
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#define COLORS (currentcontext.colors)
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#define __clip (currentcontext.clip)
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#define __clipx1 (currentcontext.clipx1)
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#define __clipy1 (currentcontext.clipy1)
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#define __clipx2 (currentcontext.clipx2)
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#define __clipy2 (currentcontext.clipy2)
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/* Configuration */
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int gl_setcontextvga(int m);
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int gl_setcontextvgavirtual(int m);
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void gl_setcontextvirtual(int w, int h, int bpp, int bitspp, void *vbuf);
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void gl_setcontextwidth(int w);
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void gl_setcontextheight(int h);
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GraphicsContext *gl_allocatecontext(void);
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void gl_setcontext(GraphicsContext * gc);
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void gl_getcontext(GraphicsContext * gc);
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void gl_freecontext(GraphicsContext * gc);
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/* Line drawing */
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void gl_setpixel(int x, int y, int c);
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void gl_setpixelrgb(int x, int y, int r, int g, int b);
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int gl_getpixel(int x, int y);
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void gl_getpixelrgb(int x, int y, int *r, int *g, int *b);
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int gl_rgbcolor(int r, int g, int b);
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void gl_hline(int x1, int y, int x2, int c);
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void gl_line(int x1, int y1, int x2, int y2, int c);
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void gl_circle(int x, int y, int r, int c);
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void gl_fillcircle(int sx, int sy, int r, int c);
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void gl_bcircle(int sx, int sy, int r, int c, int fill);
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/* Box (bitmap) functions */
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void gl_fillbox(int x, int y, int w, int h, int c);
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void gl_getbox(int x, int y, int w, int h, void *dp);
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void gl_putbox(int x, int y, int w, int h, void *dp);
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void gl_putboxpart(int x, int y, int w, int h, int bw, int bh, void *b,
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int xo, int yo);
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void gl_putboxmask(int x, int y, int w, int h, void *dp);
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void gl_copybox(int x1, int y1, int w, int h, int x2, int y2);
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void gl_copyboxtocontext(int x1, int y1, int w, int h, GraphicsContext * gc,
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int x2, int y2);
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void gl_copyboxfromcontext(GraphicsContext * gc, int x1, int y1, int w, int h,
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int x2, int y2);
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/* The following functions only work in 256-color modes: */
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void gl_compileboxmask(int w, int h, void *sdp, void *ddp);
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int gl_compiledboxmasksize(int w, int h, void *sdp);
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void gl_putboxmaskcompiled(int x, int y, int w, int h, void *dp);
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/* Miscellaneous */
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void gl_clearscreen(int c);
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void gl_scalebox(int w1, int h1, void *sb, int w2, int h2, void *db);
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void gl_setdisplaystart(int x, int y);
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void gl_enableclipping(void);
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void gl_setclippingwindow(int x1, int y1, int x2, int y2);
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void gl_disableclipping(void);
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/* Screen buffering */
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void gl_copyscreen(GraphicsContext * gc);
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void gl_setscreenoffset(int o);
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int gl_enablepageflipping(GraphicsContext * gc);
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/* Text */
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/* Writemode flags. */
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#define WRITEMODE_OVERWRITE 0
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#define WRITEMODE_MASKED 1
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#define FONT_EXPANDED 0
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#define FONT_COMPRESSED 2
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void gl_expandfont(int fw, int fh, int c, void *sfdp, void *dfdp);
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void gl_setfont(int fw, int fh, void *fdp);
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void gl_colorfont(int fw, int fh, int c, void *fdp);
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void gl_setwritemode(int wm);
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void gl_write(int x, int y, char *s);
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void gl_writen(int x, int y, int n, char *s);
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void gl_setfontcolors(int bg, int fg);
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/* gl_printf is only available in ELF libraries!! */
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int gl_printf(int x, int y, const char *fmt,...);
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extern unsigned char *gl_font8x8; /* compressed 8x8 font */
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/* 256-color Palette */
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typedef struct {
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struct {
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unsigned char red; /* 6-bit values */
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unsigned char green;
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unsigned char blue;
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} color[256];
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} Palette;
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void gl_setpalettecolor(int c, int r, int b, int g);
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void gl_getpalettecolor(int c, int *r, int *b, int *g);
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void gl_setpalettecolors(int s, int n, void *dp);
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void gl_getpalettecolors(int s, int n, void *dp);
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void gl_setpalette(void *p);
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void gl_getpalette(void *p);
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void gl_setrgbpalette(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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