21 ggi_visual_t *screenvis;
22 const ggi_directbuffer *dbuffer;
25 ubyte use_directbuffer;
30 if (!use_directbuffer)
31 ggiPutBox(screenvis, 0, 0, grd_curscreen->sc_w, grd_curscreen->sc_h, screenbuffer);
34 int gr_set_mode(u_int32_t mode)
51 if(ggiCheckGraphMode(screenvis, w, h, GGI_AUTO, GGI_AUTO, GT_8BIT, &other_mode))
52 ggiSetMode(screenvis, &other_mode);
54 ggiSetGraphMode(screenvis, w, h, GGI_AUTO, GGI_AUTO, GT_8BIT);
56 ggiSetFlags(screenvis, GGIFLAG_ASYNC);
58 if (!ggiDBGetNumBuffers(screenvis))
62 dbuffer = ggiDBGetBuffer(screenvis, 0);
63 if (!(dbuffer->type & GGI_DB_SIMPLE_PLB))
69 memset(grd_curscreen, 0, sizeof(grs_screen));
71 grd_curscreen->sc_mode = mode;
72 grd_curscreen->sc_w = w;
73 grd_curscreen->sc_h = h;
74 grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
75 grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
76 grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
77 grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
78 grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
79 grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_LINEAR;
83 grd_curscreen->sc_canvas.cv_bitmap.bm_data = dbuffer->write;
84 grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = dbuffer->buffer.plb.stride;
89 screenbuffer = d_malloc (w * h);
90 grd_curscreen->sc_canvas.cv_bitmap.bm_data = screenbuffer;
91 grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
94 gr_set_current_canvas(NULL);
96 //gamefont_choose_game_font(w,h);
104 int mode = SM(648,480);
105 // Only do this function once!
108 MALLOC(grd_curscreen,grs_screen, 1);
109 memset(grd_curscreen, 0, sizeof(grs_screen));
112 screenvis = ggiOpen(NULL);
113 ggiGetMode(screenvis, &init_mode);
115 if ((retcode=gr_set_mode(mode)))
118 grd_curscreen->sc_canvas.cv_color = 0;
119 grd_curscreen->sc_canvas.cv_drawmode = 0;
120 grd_curscreen->sc_canvas.cv_font = NULL;
121 grd_curscreen->sc_canvas.cv_font_fg_color = 0;
122 grd_curscreen->sc_canvas.cv_font_bg_color = 0;
123 gr_set_current_canvas( &grd_curscreen->sc_canvas );
134 ggiSetMode(screenvis, &init_mode);
138 d_free(grd_curscreen);
142 // Palette functions follow.
144 static int last_r=0, last_g=0, last_b=0;
146 void gr_palette_clear()
148 ggi_color *colors = calloc (256, sizeof(ggi_color));
150 ggiSetPalette (screenvis, 0, 256, colors);
152 gr_palette_faded_out = 1;
156 void gr_palette_step_up (int r, int g, int b)
159 ubyte *p = gr_palette;
162 ggi_color colors[256];
164 if (gr_palette_faded_out) return;
166 if ((r==last_r) && (g==last_g) && (b==last_b)) return;
172 for (i = 0; i < 256; i++)
174 temp = (int)(*p++) + r + gr_palette_gamma;
176 else if (temp>63) temp=63;
177 colors[i].r = temp * 0x3ff;
178 temp = (int)(*p++) + g + gr_palette_gamma;
180 else if (temp>63) temp=63;
181 colors[i].g = temp * 0x3ff;
182 temp = (int)(*p++) + b + gr_palette_gamma;
184 else if (temp>63) temp=63;
185 colors[i].b = temp * 0x3ff;
187 ggiSetPalette (screenvis, 0, 256, colors);
190 //added on 980913 by adb to fix palette problems
191 // need a min without side effects...
193 static inline int min(int x, int y) { return x < y ? x : y; }
196 void gr_palette_load (ubyte *pal)
199 ggi_color colors[256];
201 for (i = 0, j = 0; j < 256; j++)
203 gr_current_pal[i] = pal[i];
204 if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
205 colors[j].r = (min(gr_current_pal[i] + gr_palette_gamma, 63)) * 0x3ff;
207 gr_current_pal[i] = pal[i];
208 if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
209 colors[j].g = (min(gr_current_pal[i] + gr_palette_gamma, 63)) * 0x3ff;
211 gr_current_pal[i] = pal[i];
212 if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
213 colors[j].b = (min(gr_current_pal[i] + gr_palette_gamma, 63)) * 0x3ff;
217 ggiSetPalette(screenvis, 0, 256, colors);
219 gr_palette_faded_out = 0;
220 init_computed_colors();
225 int gr_palette_fade_out (ubyte *pal, int nsteps, int allow_keys)
229 fix fade_palette[768];
230 fix fade_palette_delta[768];
232 ggi_color fade_colors[256];
234 if (gr_palette_faded_out) return 0;
236 if (pal==NULL) pal=gr_current_pal;
238 for (i=0; i<768; i++)
240 gr_current_pal[i] = pal[i];
241 fade_palette[i] = i2f(pal[i]);
242 fade_palette_delta[i] = fade_palette[i] / nsteps;
245 for (j=0; j<nsteps; j++)
247 for (i = 0; i < 768; i++)
249 fade_palette[i] -= fade_palette_delta[i];
250 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma))
251 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
253 for (i = 0, k = 0; k < 256; k++)
255 c = f2i(fade_palette[i++]);
257 fade_colors[k].r = c * 0x3ff;
258 c = f2i(fade_palette[i++]);
260 fade_colors[k].g = c * 0x3ff;
261 c = f2i(fade_palette[i++]);
263 fade_colors[k].b = c * 0x3ff;
265 ggiSetPalette (screenvis, 0, 256, fade_colors);
269 gr_palette_faded_out = 1;
275 int gr_palette_fade_in (ubyte *pal, int nsteps, int allow_keys)
279 fix fade_palette[768];
280 fix fade_palette_delta[768];
282 ggi_color fade_colors[256];
284 if (!gr_palette_faded_out) return 0;
286 for (i=0; i<768; i++)
288 gr_current_pal[i] = pal[i];
290 fade_palette_delta[i] = i2f(pal[i] + gr_palette_gamma) / nsteps;
293 for (j=0; j<nsteps; j++ )
295 for (i = 0; i < 768; i++ )
297 fade_palette[i] += fade_palette_delta[i];
298 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma))
299 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
301 for (i = 0, k = 0; k < 256; k++)
303 c = f2i(fade_palette[i++]);
305 fade_colors[k].r = c * 0x3ff;
306 c = f2i(fade_palette[i++]);
308 fade_colors[k].g = c * 0x3ff;
309 c = f2i(fade_palette[i++]);
311 fade_colors[k].b = c * 0x3ff;
313 ggiSetPalette (screenvis, 0, 256, fade_colors);
317 gr_palette_faded_out = 0;
323 void gr_palette_read (ubyte *pal)
325 ggi_color colors[256];
328 ggiGetPalette (screenvis, 0, 256, colors);
330 for (i = 0, j = 0; i < 256; i++)
332 pal[j++] = colors[i].r / 0x3ff;
333 pal[j++] = colors[i].g / 0x3ff;
334 pal[j++] = colors[i].b / 0x3ff;
338 #endif /* GGI_VIDEO */