16 ggi_visual_t *screenvis;
17 const ggi_directbuffer *dbuffer;
19 ubyte use_directbuffer;
24 if (!use_directbuffer)
25 ggiPutBox(screenvis, 0, 0, grd_curscreen->sc_w, grd_curscreen->sc_h, screenbuffer);
28 int gr_set_mode(u_int32_t mode)
45 if(ggiCheckGraphMode(screenvis, w, h, GGI_AUTO, GGI_AUTO, GT_8BIT, &other_mode))
46 ggiSetMode(screenvis, &other_mode);
48 ggiSetGraphMode(screenvis, w, h, GGI_AUTO, GGI_AUTO, GT_8BIT);
50 ggiSetFlags(screenvis, GGIFLAG_ASYNC);
52 if (!ggiDBGetNumBuffers(screenvis))
56 dbuffer = ggiDBGetBuffer(screenvis, 0);
57 if (!(dbuffer->type & GGI_DB_SIMPLE_PLB))
63 memset(grd_curscreen, 0, sizeof(grs_screen));
65 grd_curscreen->sc_mode = mode;
66 grd_curscreen->sc_w = w;
67 grd_curscreen->sc_h = h;
68 grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
69 grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
70 grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
71 grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
72 grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
73 grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_LINEAR;
77 grd_curscreen->sc_canvas.cv_bitmap.bm_data = dbuffer->write;
78 grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = dbuffer->buffer.plb.stride;
83 screenbuffer = d_malloc (w * h);
84 grd_curscreen->sc_canvas.cv_bitmap.bm_data = screenbuffer;
85 grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
88 gr_set_current_canvas(NULL);
90 gamefont_choose_game_font(w,h);
98 // Only do this function once!
101 MALLOC(grd_curscreen,grs_screen, 1);
102 memset(grd_curscreen, 0, sizeof(grs_screen));
105 screenvis = ggiOpen(NULL);
107 if ((retcode=gr_set_mode(mode)))
110 grd_curscreen->sc_canvas.cv_color = 0;
111 grd_curscreen->sc_canvas.cv_drawmode = 0;
112 grd_curscreen->sc_canvas.cv_font = NULL;
113 grd_curscreen->sc_canvas.cv_font_fg_color = 0;
114 grd_curscreen->sc_canvas.cv_font_bg_color = 0;
115 gr_set_current_canvas( &grd_curscreen->sc_canvas );
129 d_free(grd_curscreen);
133 // Palette functions follow.
135 static int last_r=0, last_g=0, last_b=0;
137 void gr_palette_clear()
139 ggi_color *colors = calloc (256, sizeof(ggi_color));
141 ggiSetPalette (screenvis, 0, 256, colors);
143 gr_palette_faded_out = 1;
147 void gr_palette_step_up (int r, int g, int b)
150 ubyte *p = gr_palette;
153 ggi_color colors[256];
155 if (gr_palette_faded_out) return;
157 if ((r==last_r) && (g==last_g) && (b==last_b)) return;
163 for (i = 0; i < 256; i++)
165 temp = (int)(*p++) + r + gr_palette_gamma;
167 else if (temp>63) temp=63;
168 colors[i].r = temp * 0x3ff;
169 temp = (int)(*p++) + g + gr_palette_gamma;
171 else if (temp>63) temp=63;
172 colors[i].g = temp * 0x3ff;
173 temp = (int)(*p++) + b + gr_palette_gamma;
175 else if (temp>63) temp=63;
176 colors[i].b = temp * 0x3ff;
178 ggiSetPalette (screenvis, 0, 256, colors);
181 //added on 980913 by adb to fix palette problems
182 // need a min without side effects...
184 static inline int min(int x, int y) { return x < y ? x : y; }
187 void gr_palette_load (ubyte *pal)
190 ggi_color colors[256];
192 for (i = 0, j = 0; j < 256; j++)
194 gr_current_pal[i] = pal[i];
195 if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
196 colors[j].r = (min(gr_current_pal[i] + gr_palette_gamma, 63)) * 0x3ff;
198 gr_current_pal[i] = pal[i];
199 if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
200 colors[j].g = (min(gr_current_pal[i] + gr_palette_gamma, 63)) * 0x3ff;
202 gr_current_pal[i] = pal[i];
203 if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
204 colors[j].b = (min(gr_current_pal[i] + gr_palette_gamma, 63)) * 0x3ff;
208 ggiSetPalette(screenvis, 0, 256, colors);
210 gr_palette_faded_out = 0;
211 init_computed_colors();
216 int gr_palette_fade_out (ubyte *pal, int nsteps, int allow_keys)
220 fix fade_palette[768];
221 fix fade_palette_delta[768];
223 ggi_color fade_colors[256];
225 if (gr_palette_faded_out) return 0;
227 if (pal==NULL) pal=gr_current_pal;
229 for (i=0; i<768; i++)
231 gr_current_pal[i] = pal[i];
232 fade_palette[i] = i2f(pal[i]);
233 fade_palette_delta[i] = fade_palette[i] / nsteps;
236 for (j=0; j<nsteps; j++)
238 for (i = 0; i < 768; i++)
240 fade_palette[i] -= fade_palette_delta[i];
241 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma))
242 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
244 for (i = 0, k = 0; k < 256; k++)
246 c = f2i(fade_palette[i++]);
248 fade_colors[k].r = c * 0x3ff;
249 c = f2i(fade_palette[i++]);
251 fade_colors[k].g = c * 0x3ff;
252 c = f2i(fade_palette[i++]);
254 fade_colors[k].b = c * 0x3ff;
256 ggiSetPalette (screenvis, 0, 256, fade_colors);
260 gr_palette_faded_out = 1;
266 int gr_palette_fade_in (ubyte *pal, int nsteps, int allow_keys)
270 fix fade_palette[768];
271 fix fade_palette_delta[768];
273 ggi_color fade_colors[256];
275 if (!gr_palette_faded_out) return 0;
277 for (i=0; i<768; i++)
279 gr_current_pal[i] = pal[i];
281 fade_palette_delta[i] = i2f(pal[i] + gr_palette_gamma) / nsteps;
284 for (j=0; j<nsteps; j++ )
286 for (i = 0; i < 768; i++ )
288 fade_palette[i] += fade_palette_delta[i];
289 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma))
290 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
292 for (i = 0, k = 0; k < 256; k++)
294 c = f2i(fade_palette[i++]);
296 fade_colors[k].r = c * 0x3ff;
297 c = f2i(fade_palette[i++]);
299 fade_colors[k].g = c * 0x3ff;
300 c = f2i(fade_palette[i++]);
302 fade_colors[k].b = c * 0x3ff;
304 ggiSetPalette (screenvis, 0, 256, fade_colors);
308 gr_palette_faded_out = 0;
314 void gr_palette_read (ubyte *pal)
316 ggi_color colors[256];
319 ggiGetPalette (screenvis, 0, 256, colors);
321 for (i = 0, j = 0; i < 256; i++)
323 pal[j++] = colors[i].r / 0x3ff;
324 pal[j++] = colors[i].g / 0x3ff;
325 pal[j++] = colors[i].b / 0x3ff;