清单 1 MiniGUI 中的图形引擎结构（src/include/gal.h）
55 typedef struct tagGFX
56 {
57 char* id;
58
59 // Initialization and termination
60 BOOL (*initgfx) (struct tagGFX* gfx);
61 void (*termgfx) (struct tagGFX* gfx);
62
63 // Phisical graphics context
64 GAL_GC phygc;
65 int bytes_per_phypixel;
66 int bits_per_phypixel;
67 int width_phygc;
68 int height_phygc;
69 int colors_phygc;
70 BOOL grayscale_screen;
71
72 // GC properties
73 int (*bytesperpixel) (GAL_GC gc);
74 int (*bitsperpixel) (GAL_GC gc);
75 int (*width) (GAL_GC gc);
76 int (*height) (GAL_GC gc);
77 int (*colors) (GAL_GC gc);
78
79 // Allocation and release of graphics context
80 int (*allocategc) (GAL_GC gc, int width, int height, int depth,
81 GAL_GC* newgc);
82 void (*freegc) (GAL_GC gc);
83 void (*setgc) (GAL_GC gc);
84
85 // Clipping of graphics context
86 void (*enableclipping) (GAL_GC gc);
87 void (*disableclipping) (GAL_GC gc);
88 int (*setclipping) (GAL_GC gc, int x1, int y1, int x2, int y2);
89 int (*getclipping) (GAL_GC gc, int* x1, int* y1, int* x2, int* y2);
90
91 // Background and foreground colors
92 int (*getbgcolor) (GAL_GC gc, gal_pixel* color);
93 int (*setbgcolor) (GAL_GC gc, gal_pixel color);
94 int (*getfgcolor) (GAL_GC gc, gal_pixel* color);
95 int (*setfgcolor) (GAL_GC gc, gal_pixel color);
96
97 // Convertion between gal_color and gal_pixel
98 gal_pixel (*mapcolor) (GAL_GC gc, gal_color *color);
99 int (*unmappixel) (GAL_GC gc, gal_pixel pixel, gal_color* color);
100 int (*packcolors) (GAL_GC gc, void* buf, gal_color* colors, int len);
101 int (*unpackpixels) (GAL_GC gc, void* buf, gal_color* colors, int len);
102
103 // Palette operations
104 int (*getpalette) (GAL_GC gc, int s, int len, gal_color* cmap);
105 int (*setpalette) (GAL_GC gc, int s, int len, gal_color* cmap);
106 int (*setcolorfulpalette) (GAL_GC gc);
107
108 // Box operations
109 size_t (*boxsize) (GAL_GC gc, int w, int h);
110 int (*fillbox) (GAL_GC gc, int x, int y, int w, int h,
111 gal_pixel pixel);
112 int (*putbox) (GAL_GC gc, int x, int y, int w, int h, void* buf);
113 int (*getbox) (GAL_GC gc, int x, int y, int w, int h, void* buf);
114 int (*putboxmask) (GAL_GC gc, int x, int y, int w, int h, void* buf, gal_pixel cxx);
115 int (*putboxpart) (GAL_GC gc, int x, int y, int w, int h, int bw,
116 int bh, void* buf, int xo, int yo);
117 int (*putboxwithop) (GAL_GC gc, int x, int y, int w, int h,
118 void* buf, int raster_op);
119 int (*scalebox) (GAL_GC gc, int sw, int sh, void* srcbuf,
120 int dw, int dh, void* dstbuf);
121
122 int (*copybox) (GAL_GC gc, int x, int y, int w, int h, int nx, int ny);
123 int (*crossblit) (GAL_GC src, int sx, int sy, int sw, int sh,
124 GAL_GC dst, int dx, int dy);
125
126 // Horizontal line operaions
127 int (*drawhline) (GAL_GC gc, int x, int y, int w, gal_pixel pixel);
128 int (*puthline) (GAL_GC gc, int x, int y, int w, void* buf);
129 int (*gethline) (GAL_GC gc, int x, int y, int w, void* buf);
130
131 // Vertical line operations
132 int (*drawvline) (GAL_GC gc, int x, int y, int h, gal_pixel pixel);
133 int (*putvline) (GAL_GC gc, int x, int y, int h, void* buf);
134 int (*getvline) (GAL_GC gc, int x, int y, int h, void* buf);
135
136 // Pixel operations
137 int (*drawpixel) (GAL_GC gc, int x, int y, gal_pixel pixel);
138 int (*putpixel) (GAL_GC gc, int x, int y, gal_pixel color);
139 int (*getpixel) (GAL_GC gc, int x, int y, gal_pixel* color);
140
141 // Other drawing
142 int (*circle) (GAL_GC gc, int x, int y, int r, gal_pixel pixel);
143 int (*line) (GAL_GC gc, int x1, int y1, int x2, int y2,
144 gal_pixel pixel);
145 int (*rectangle) (GAL_GC gc, int l, int t, int r, int b,
146 gal_pixel pixel);
147
148 // Simple Character output
149 int (*putchar) (GAL_GC gc, int x, int y, char c);
150 int (*putstr) (GAL_GC gc, int x, int y, const char* str);
151 int (*getcharsize) (GAL_GC gc, int* width, int* height);
152 int (*setputcharmode) (GAL_GC gc, int bkmode);
153 int (*setfontcolors) (GAL_GC gc,
154 gal_pixel fg, gal_pixel bg);
155
156 // Asynchronous mode support
157 void (*flush) (GAL_GC gc);
158 void (*flushregion) (GAL_GC gc, int x, int y, int w, int h);
159
160 // Panic
161 void (*panic) (int exitcode);
162
163 } GFX;
164
165 extern GFX* cur_gfx;
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