2 * $Source: /cvs/cvsroot/d2x/arch/ggi/gr.c,v $
5 * $Date: 2001-10-25 08:25:34 $
7 * Graphics functions for GGI.
9 * $Log: not supported by cvs2svn $
10 * Revision 1.3 2001/01/29 13:47:51 bradleyb
11 * Fixed build, some minor cleanups.
35 ggi_visual_t *screenvis;
36 const ggi_directbuffer *dbuffer;
39 ubyte use_directbuffer;
44 if (!use_directbuffer)
45 ggiPutBox(screenvis, 0, 0, grd_curscreen->sc_w, grd_curscreen->sc_h, screenbuffer);
48 int gr_set_mode(u_int32_t mode)
65 if(ggiCheckGraphMode(screenvis, w, h, GGI_AUTO, GGI_AUTO, GT_8BIT, &other_mode))
66 ggiSetMode(screenvis, &other_mode);
68 ggiSetGraphMode(screenvis, w, h, GGI_AUTO, GGI_AUTO, GT_8BIT);
70 ggiSetFlags(screenvis, GGIFLAG_ASYNC);
72 if (!ggiDBGetNumBuffers(screenvis))
76 dbuffer = ggiDBGetBuffer(screenvis, 0);
77 if (!(dbuffer->type & GGI_DB_SIMPLE_PLB))
83 memset(grd_curscreen, 0, sizeof(grs_screen));
85 grd_curscreen->sc_mode = mode;
86 grd_curscreen->sc_w = w;
87 grd_curscreen->sc_h = h;
88 grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
89 grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
90 grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
91 grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
92 grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
93 grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_LINEAR;
97 grd_curscreen->sc_canvas.cv_bitmap.bm_data = dbuffer->write;
98 grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = dbuffer->buffer.plb.stride;
102 d_free(screenbuffer);
103 screenbuffer = d_malloc (w * h);
104 grd_curscreen->sc_canvas.cv_bitmap.bm_data = screenbuffer;
105 grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
108 gr_set_current_canvas(NULL);
110 //gamefont_choose_game_font(w,h);
118 int mode = SM(648,480);
119 // Only do this function once!
122 MALLOC(grd_curscreen,grs_screen, 1);
123 memset(grd_curscreen, 0, sizeof(grs_screen));
126 screenvis = ggiOpen(NULL);
127 ggiGetMode(screenvis, &init_mode);
129 if ((retcode=gr_set_mode(mode)))
132 grd_curscreen->sc_canvas.cv_color = 0;
133 grd_curscreen->sc_canvas.cv_drawmode = 0;
134 grd_curscreen->sc_canvas.cv_font = NULL;
135 grd_curscreen->sc_canvas.cv_font_fg_color = 0;
136 grd_curscreen->sc_canvas.cv_font_bg_color = 0;
137 gr_set_current_canvas( &grd_curscreen->sc_canvas );
148 ggiSetMode(screenvis, &init_mode);
152 d_free(grd_curscreen);
156 // Palette functions follow.
158 static int last_r=0, last_g=0, last_b=0;
160 void gr_palette_clear()
162 ggi_color *colors = calloc (256, sizeof(ggi_color));
164 ggiSetPalette (screenvis, 0, 256, colors);
166 gr_palette_faded_out = 1;
170 void gr_palette_step_up (int r, int g, int b)
173 ubyte *p = gr_palette;
176 ggi_color colors[256];
178 if (gr_palette_faded_out) return;
180 if ((r==last_r) && (g==last_g) && (b==last_b)) return;
186 for (i = 0; i < 256; i++)
188 temp = (int)(*p++) + r + gr_palette_gamma;
190 else if (temp>63) temp=63;
191 colors[i].r = temp * 0x3ff;
192 temp = (int)(*p++) + g + gr_palette_gamma;
194 else if (temp>63) temp=63;
195 colors[i].g = temp * 0x3ff;
196 temp = (int)(*p++) + b + gr_palette_gamma;
198 else if (temp>63) temp=63;
199 colors[i].b = temp * 0x3ff;
201 ggiSetPalette (screenvis, 0, 256, colors);
204 //added on 980913 by adb to fix palette problems
205 // need a min without side effects...
207 static inline int min(int x, int y) { return x < y ? x : y; }
210 void gr_palette_load (ubyte *pal)
213 ggi_color colors[256];
215 for (i = 0, j = 0; j < 256; j++)
217 gr_current_pal[i] = pal[i];
218 if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
219 colors[j].r = (min(gr_current_pal[i] + gr_palette_gamma, 63)) * 0x3ff;
221 gr_current_pal[i] = pal[i];
222 if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
223 colors[j].g = (min(gr_current_pal[i] + gr_palette_gamma, 63)) * 0x3ff;
225 gr_current_pal[i] = pal[i];
226 if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
227 colors[j].b = (min(gr_current_pal[i] + gr_palette_gamma, 63)) * 0x3ff;
231 ggiSetPalette(screenvis, 0, 256, colors);
233 gr_palette_faded_out = 0;
234 init_computed_colors();
239 int gr_palette_fade_out (ubyte *pal, int nsteps, int allow_keys)
243 fix fade_palette[768];
244 fix fade_palette_delta[768];
246 ggi_color fade_colors[256];
248 if (gr_palette_faded_out) return 0;
250 if (pal==NULL) pal=gr_current_pal;
252 for (i=0; i<768; i++)
254 gr_current_pal[i] = pal[i];
255 fade_palette[i] = i2f(pal[i]);
256 fade_palette_delta[i] = fade_palette[i] / nsteps;
259 for (j=0; j<nsteps; j++)
261 for (i = 0; i < 768; i++)
263 fade_palette[i] -= fade_palette_delta[i];
264 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma))
265 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
267 for (i = 0, k = 0; k < 256; k++)
269 c = f2i(fade_palette[i++]);
271 fade_colors[k].r = c * 0x3ff;
272 c = f2i(fade_palette[i++]);
274 fade_colors[k].g = c * 0x3ff;
275 c = f2i(fade_palette[i++]);
277 fade_colors[k].b = c * 0x3ff;
279 ggiSetPalette (screenvis, 0, 256, fade_colors);
283 gr_palette_faded_out = 1;
289 int gr_palette_fade_in (ubyte *pal, int nsteps, int allow_keys)
293 fix fade_palette[768];
294 fix fade_palette_delta[768];
296 ggi_color fade_colors[256];
298 if (!gr_palette_faded_out) return 0;
300 for (i=0; i<768; i++)
302 gr_current_pal[i] = pal[i];
304 fade_palette_delta[i] = i2f(pal[i] + gr_palette_gamma) / nsteps;
307 for (j=0; j<nsteps; j++ )
309 for (i = 0; i < 768; i++ )
311 fade_palette[i] += fade_palette_delta[i];
312 if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma))
313 fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
315 for (i = 0, k = 0; k < 256; k++)
317 c = f2i(fade_palette[i++]);
319 fade_colors[k].r = c * 0x3ff;
320 c = f2i(fade_palette[i++]);
322 fade_colors[k].g = c * 0x3ff;
323 c = f2i(fade_palette[i++]);
325 fade_colors[k].b = c * 0x3ff;
327 ggiSetPalette (screenvis, 0, 256, fade_colors);
331 gr_palette_faded_out = 0;
337 void gr_palette_read (ubyte *pal)
339 ggi_color colors[256];
342 ggiGetPalette (screenvis, 0, 256, colors);
344 for (i = 0, j = 0; i < 256; i++)
346 pal[j++] = colors[i].r / 0x3ff;
347 pal[j++] = colors[i].g / 0x3ff;
348 pal[j++] = colors[i].b / 0x3ff;