3 * Graphics functions for GGI.
28 ggi_visual_t *screenvis;
29 const ggi_directbuffer *dbuffer;
32 ubyte use_directbuffer;
37 if (!use_directbuffer)
38 ggiPutBox(screenvis, 0, 0, grd_curscreen->sc_w, grd_curscreen->sc_h, screenbuffer);
41 int gr_set_mode(uint32_t mode)
58 if(ggiCheckGraphMode(screenvis, w, h, GGI_AUTO, GGI_AUTO, GT_8BIT, &other_mode))
59 ggiSetMode(screenvis, &other_mode);
61 ggiSetGraphMode(screenvis, w, h, GGI_AUTO, GGI_AUTO, GT_8BIT);
63 ggiSetFlags(screenvis, GGIFLAG_ASYNC);
65 if (!ggiDBGetNumBuffers(screenvis))
69 dbuffer = ggiDBGetBuffer(screenvis, 0);
70 if (!(dbuffer->type & GGI_DB_SIMPLE_PLB))
76 memset(grd_curscreen, 0, sizeof(grs_screen));
78 grd_curscreen->sc_mode = mode;
79 grd_curscreen->sc_w = w;
80 grd_curscreen->sc_h = h;
81 grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
82 grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
83 grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
84 grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
85 grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
86 grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_LINEAR;
90 grd_curscreen->sc_canvas.cv_bitmap.bm_data = dbuffer->write;
91 grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = dbuffer->buffer.plb.stride;
96 screenbuffer = d_malloc (w * h);
97 grd_curscreen->sc_canvas.cv_bitmap.bm_data = screenbuffer;
98 grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
101 gr_set_current_canvas(NULL);
103 //gamefont_choose_game_font(w,h);
111 int mode = SM(648,480);
112 // Only do this function once!
115 MALLOC(grd_curscreen,grs_screen, 1);
116 memset(grd_curscreen, 0, sizeof(grs_screen));
119 screenvis = ggiOpen(NULL);
120 ggiGetMode(screenvis, &init_mode);
122 if ((retcode=gr_set_mode(mode)))
125 grd_curscreen->sc_canvas.cv_color = 0;
126 grd_curscreen->sc_canvas.cv_drawmode = 0;
127 grd_curscreen->sc_canvas.cv_font = NULL;
128 grd_curscreen->sc_canvas.cv_font_fg_color = 0;
129 grd_curscreen->sc_canvas.cv_font_bg_color = 0;
130 gr_set_current_canvas( &grd_curscreen->sc_canvas );
141 ggiSetMode(screenvis, &init_mode);
145 d_free(grd_curscreen);
149 // Palette functions follow.
151 static int last_r=0, last_g=0, last_b=0;
153 void gr_palette_clear()
155 ggi_color *colors = calloc (256, sizeof(ggi_color));
157 ggiSetPalette (screenvis, 0, 256, colors);
159 gr_palette_faded_out = 1;
163 void gr_palette_step_up (int r, int g, int b)
166 ubyte *p = gr_palette;
169 ggi_color colors[256];
171 if (gr_palette_faded_out) return;
173 if ((r==last_r) && (g==last_g) && (b==last_b)) return;
179 for (i = 0; i < 256; i++)
181 temp = (int)(*p++) + r + gr_palette_gamma;
183 else if (temp>63) temp=63;
184 colors[i].r = temp * 0x3ff;
185 temp = (int)(*p++) + g + gr_palette_gamma;
187 else if (temp>63) temp=63;
188 colors[i].g = temp * 0x3ff;
189 temp = (int)(*p++) + b + gr_palette_gamma;
191 else if (temp>63) temp=63;
192 colors[i].b = temp * 0x3ff;
194 ggiSetPalette (screenvis, 0, 256, colors);
197 //added on 980913 by adb to fix palette problems
198 // need a min without side effects...
200 static inline int min(int x, int y) { return x < y ? x : y; }
203 void gr_palette_load (ubyte *pal)
206 ggi_color colors[256];
208 for (i = 0, j = 0; j < 256; j++)
210 gr_current_pal[i] = pal[i];
211 if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
212 colors[j].r = (min(gr_current_pal[i] + gr_palette_gamma, 63)) * 0x3ff;
214 gr_current_pal[i] = pal[i];
215 if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
216 colors[j].g = (min(gr_current_pal[i] + gr_palette_gamma, 63)) * 0x3ff;
218 gr_current_pal[i] = pal[i];
219 if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
220 colors[j].b = (min(gr_current_pal[i] + gr_palette_gamma, 63)) * 0x3ff;
224 ggiSetPalette(screenvis, 0, 256, colors);
226 gr_palette_faded_out = 0;
227 init_computed_colors();
232 int gr_palette_fade_out (ubyte *pal, int nsteps, int allow_keys)
236 fix fade_palette[768];
237 fix fade_palette_delta[768];
239 ggi_color fade_colors[256];
241 if (gr_palette_faded_out) return 0;
243 if (pal==NULL) pal=gr_current_pal;
245 for (i=0; i<768; i++)
247 gr_current_pal[i] = pal[i];
248 fade_palette[i] = i2f(pal[i]);
249 fade_palette_delta[i] = fade_palette[i] / nsteps;
252 for (j=0; j<nsteps; j++)
254 for (i = 0; i < 768; i++)
256 fade_palette[i] -= fade_palette_delta[i];
257 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma))
258 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
260 for (i = 0, k = 0; k < 256; k++)
262 c = f2i(fade_palette[i++]);
264 fade_colors[k].r = c * 0x3ff;
265 c = f2i(fade_palette[i++]);
267 fade_colors[k].g = c * 0x3ff;
268 c = f2i(fade_palette[i++]);
270 fade_colors[k].b = c * 0x3ff;
272 ggiSetPalette (screenvis, 0, 256, fade_colors);
276 gr_palette_faded_out = 1;
282 int gr_palette_fade_in (ubyte *pal, int nsteps, int allow_keys)
286 fix fade_palette[768];
287 fix fade_palette_delta[768];
289 ggi_color fade_colors[256];
291 if (!gr_palette_faded_out) return 0;
293 for (i=0; i<768; i++)
295 gr_current_pal[i] = pal[i];
297 fade_palette_delta[i] = i2f(pal[i] + gr_palette_gamma) / nsteps;
300 for (j=0; j<nsteps; j++ )
302 for (i = 0; i < 768; i++ )
304 fade_palette[i] += fade_palette_delta[i];
305 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma))
306 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
308 for (i = 0, k = 0; k < 256; k++)
310 c = f2i(fade_palette[i++]);
312 fade_colors[k].r = c * 0x3ff;
313 c = f2i(fade_palette[i++]);
315 fade_colors[k].g = c * 0x3ff;
316 c = f2i(fade_palette[i++]);
318 fade_colors[k].b = c * 0x3ff;
320 ggiSetPalette (screenvis, 0, 256, fade_colors);
324 gr_palette_faded_out = 0;
330 void gr_palette_read (ubyte *pal)
332 ggi_color colors[256];
335 ggiGetPalette (screenvis, 0, 256, colors);
337 for (i = 0, j = 0; i < 256; i++)
339 pal[j++] = colors[i].r / 0x3ff;
340 pal[j++] = colors[i].g / 0x3ff;
341 pal[j++] = colors[i].b / 0x3ff;