2 * $Source: /cvs/cvsroot/d2x/video/ggi_gr.c,v $
5 * $Date: 2001-01-29 13:47:51 $
7 * Graphics functions for GGI.
9 * $Log: not supported by cvs2svn $
32 ggi_visual_t *screenvis;
33 const ggi_directbuffer *dbuffer;
36 ubyte use_directbuffer;
41 if (!use_directbuffer)
42 ggiPutBox(screenvis, 0, 0, grd_curscreen->sc_w, grd_curscreen->sc_h, screenbuffer);
45 int gr_set_mode(u_int32_t mode)
62 if(ggiCheckGraphMode(screenvis, w, h, GGI_AUTO, GGI_AUTO, GT_8BIT, &other_mode))
63 ggiSetMode(screenvis, &other_mode);
65 ggiSetGraphMode(screenvis, w, h, GGI_AUTO, GGI_AUTO, GT_8BIT);
67 ggiSetFlags(screenvis, GGIFLAG_ASYNC);
69 if (!ggiDBGetNumBuffers(screenvis))
73 dbuffer = ggiDBGetBuffer(screenvis, 0);
74 if (!(dbuffer->type & GGI_DB_SIMPLE_PLB))
80 memset(grd_curscreen, 0, sizeof(grs_screen));
82 grd_curscreen->sc_mode = mode;
83 grd_curscreen->sc_w = w;
84 grd_curscreen->sc_h = h;
85 grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
86 grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
87 grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
88 grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
89 grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
90 grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_LINEAR;
94 grd_curscreen->sc_canvas.cv_bitmap.bm_data = dbuffer->write;
95 grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = dbuffer->buffer.plb.stride;
100 screenbuffer = d_malloc (w * h);
101 grd_curscreen->sc_canvas.cv_bitmap.bm_data = screenbuffer;
102 grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
105 gr_set_current_canvas(NULL);
107 //gamefont_choose_game_font(w,h);
115 int mode = SM(648,480);
116 // Only do this function once!
119 MALLOC(grd_curscreen,grs_screen, 1);
120 memset(grd_curscreen, 0, sizeof(grs_screen));
123 screenvis = ggiOpen(NULL);
124 ggiGetMode(screenvis, &init_mode);
126 if ((retcode=gr_set_mode(mode)))
129 grd_curscreen->sc_canvas.cv_color = 0;
130 grd_curscreen->sc_canvas.cv_drawmode = 0;
131 grd_curscreen->sc_canvas.cv_font = NULL;
132 grd_curscreen->sc_canvas.cv_font_fg_color = 0;
133 grd_curscreen->sc_canvas.cv_font_bg_color = 0;
134 gr_set_current_canvas( &grd_curscreen->sc_canvas );
145 ggiSetMode(screenvis, &init_mode);
149 d_free(grd_curscreen);
153 // Palette functions follow.
155 static int last_r=0, last_g=0, last_b=0;
157 void gr_palette_clear()
159 ggi_color *colors = calloc (256, sizeof(ggi_color));
161 ggiSetPalette (screenvis, 0, 256, colors);
163 gr_palette_faded_out = 1;
167 void gr_palette_step_up (int r, int g, int b)
170 ubyte *p = gr_palette;
173 ggi_color colors[256];
175 if (gr_palette_faded_out) return;
177 if ((r==last_r) && (g==last_g) && (b==last_b)) return;
183 for (i = 0; i < 256; i++)
185 temp = (int)(*p++) + r + gr_palette_gamma;
187 else if (temp>63) temp=63;
188 colors[i].r = temp * 0x3ff;
189 temp = (int)(*p++) + g + gr_palette_gamma;
191 else if (temp>63) temp=63;
192 colors[i].g = temp * 0x3ff;
193 temp = (int)(*p++) + b + gr_palette_gamma;
195 else if (temp>63) temp=63;
196 colors[i].b = temp * 0x3ff;
198 ggiSetPalette (screenvis, 0, 256, colors);
201 //added on 980913 by adb to fix palette problems
202 // need a min without side effects...
204 static inline int min(int x, int y) { return x < y ? x : y; }
207 void gr_palette_load (ubyte *pal)
210 ggi_color colors[256];
212 for (i = 0, j = 0; j < 256; j++)
214 gr_current_pal[i] = pal[i];
215 if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
216 colors[j].r = (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].g = (min(gr_current_pal[i] + gr_palette_gamma, 63)) * 0x3ff;
222 gr_current_pal[i] = pal[i];
223 if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
224 colors[j].b = (min(gr_current_pal[i] + gr_palette_gamma, 63)) * 0x3ff;
228 ggiSetPalette(screenvis, 0, 256, colors);
230 gr_palette_faded_out = 0;
231 init_computed_colors();
236 int gr_palette_fade_out (ubyte *pal, int nsteps, int allow_keys)
240 fix fade_palette[768];
241 fix fade_palette_delta[768];
243 ggi_color fade_colors[256];
245 if (gr_palette_faded_out) return 0;
247 if (pal==NULL) pal=gr_current_pal;
249 for (i=0; i<768; i++)
251 gr_current_pal[i] = pal[i];
252 fade_palette[i] = i2f(pal[i]);
253 fade_palette_delta[i] = fade_palette[i] / nsteps;
256 for (j=0; j<nsteps; j++)
258 for (i = 0; i < 768; i++)
260 fade_palette[i] -= fade_palette_delta[i];
261 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma))
262 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
264 for (i = 0, k = 0; k < 256; k++)
266 c = f2i(fade_palette[i++]);
268 fade_colors[k].r = c * 0x3ff;
269 c = f2i(fade_palette[i++]);
271 fade_colors[k].g = c * 0x3ff;
272 c = f2i(fade_palette[i++]);
274 fade_colors[k].b = c * 0x3ff;
276 ggiSetPalette (screenvis, 0, 256, fade_colors);
280 gr_palette_faded_out = 1;
286 int gr_palette_fade_in (ubyte *pal, int nsteps, int allow_keys)
290 fix fade_palette[768];
291 fix fade_palette_delta[768];
293 ggi_color fade_colors[256];
295 if (!gr_palette_faded_out) return 0;
297 for (i=0; i<768; i++)
299 gr_current_pal[i] = pal[i];
301 fade_palette_delta[i] = i2f(pal[i] + gr_palette_gamma) / nsteps;
304 for (j=0; j<nsteps; j++ )
306 for (i = 0; i < 768; i++ )
308 fade_palette[i] += fade_palette_delta[i];
309 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma))
310 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
312 for (i = 0, k = 0; k < 256; k++)
314 c = f2i(fade_palette[i++]);
316 fade_colors[k].r = c * 0x3ff;
317 c = f2i(fade_palette[i++]);
319 fade_colors[k].g = c * 0x3ff;
320 c = f2i(fade_palette[i++]);
322 fade_colors[k].b = c * 0x3ff;
324 ggiSetPalette (screenvis, 0, 256, fade_colors);
328 gr_palette_faded_out = 0;
334 void gr_palette_read (ubyte *pal)
336 ggi_color colors[256];
339 ggiGetPalette (screenvis, 0, 256, colors);
341 for (i = 0, j = 0; i < 256; i++)
343 pal[j++] = colors[i].r / 0x3ff;
344 pal[j++] = colors[i].g / 0x3ff;
345 pal[j++] = colors[i].b / 0x3ff;