/[gxemul]/trunk/src/devices/dev_fb.c
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revision 5 by dpavlin, Mon Oct 8 16:18:00 2007 UTC revision 6 by dpavlin, Mon Oct 8 16:18:11 2007 UTC
# Line 25  Line 25 
25   *  SUCH DAMAGE.   *  SUCH DAMAGE.
26   *     *  
27   *   *
28   *  $Id: dev_fb.c,v 1.90 2005/03/29 09:46:06 debug Exp $   *  $Id: dev_fb.c,v 1.94 2005/05/23 14:22:02 debug Exp $
29   *     *  
30   *  Generic framebuffer device.   *  Generic framebuffer device.
31   *   *
# Line 65  Line 65 
65  #endif  #endif
66    
67    
68  #define FB_TICK_SHIFT           18  #define FB_TICK_SHIFT           17
69    
70  #define LOGO_XSIZE              256  #define LOGO_XSIZE              256
71  #define LOGO_YSIZE              256  #define LOGO_YSIZE              256
# Line 115  void set_blackwhite_palette(struct vfb_d Line 115  void set_blackwhite_palette(struct vfb_d
115    
116    
117  /*  /*
118     *  dev_fb_resize():
119     *
120     *  Resize a framebuffer window. (This functionality is probably a bit buggy,
121     *  because I didn't think of including it from the start.)
122     */
123    void dev_fb_resize(struct vfb_data *d, int new_xsize, int new_ysize)
124    {
125            unsigned char *new_framebuffer;
126            int y, new_bytes_per_line;
127            size_t size;
128    
129            if (d == NULL) {
130                    fatal("dev_fb_resize(): d == NULL\n");
131                    return;
132            }
133    
134            new_bytes_per_line = new_xsize * d->bit_depth / 8;
135            size = new_ysize * new_bytes_per_line;
136    
137            new_framebuffer = malloc(size);
138            if (new_framebuffer == NULL) {
139                    fprintf(stderr, "dev_fb_resize(): out of memory\n");
140                    exit(1);
141            }
142    
143            /*  Copy the old framebuffer to the new:  */
144            if (d->framebuffer != NULL) {
145                    for (y=0; y<new_ysize; y++) {
146                            size_t fromofs = d->bytes_per_line * y;
147                            size_t toofs = new_bytes_per_line * y;
148                            size_t len_to_copy = d->bytes_per_line <
149                                new_bytes_per_line? d->bytes_per_line      
150                                : new_bytes_per_line;
151                            memset(new_framebuffer + toofs, 0, new_bytes_per_line);
152                            if (y < d->x11_ysize)
153                                    memmove(new_framebuffer + toofs,
154                                        d->framebuffer + fromofs, len_to_copy);
155                    }
156    
157                    free(d->framebuffer);
158            }
159    
160            d->framebuffer = new_framebuffer;
161            d->framebuffer_size = size;
162    
163            if (new_xsize > d->x11_xsize || new_ysize > d->x11_ysize) {
164                    d->update_x1 = d->update_y1 = 0;
165                    d->update_x2 = new_xsize - 1;
166                    d->update_y2 = new_ysize - 1;
167            }
168    
169            d->bytes_per_line = new_bytes_per_line;
170            d->x11_xsize = d->visible_xsize = new_xsize;
171            d->x11_ysize = d->visible_ysize = new_ysize;
172    
173    #ifdef WITH_X11
174            if (d->fb_window != NULL)
175                    x11_fb_resize(d->fb_window, new_xsize, new_ysize);
176    #endif
177    }
178    
179    
180    /*
181   *  dev_fb_setcursor():   *  dev_fb_setcursor():
182   */   */
183  void dev_fb_setcursor(struct vfb_data *d, int cursor_x, int cursor_y, int on,  void dev_fb_setcursor(struct vfb_data *d, int cursor_x, int cursor_y, int on,
# Line 750  int dev_fb_access(struct cpu *cpu, struc Line 813  int dev_fb_access(struct cpu *cpu, struc
813          }          }
814  #endif  #endif
815    
816            if (relative_addr >= d->framebuffer_size)
817                    return 0;
818    
819          /*  See if a write actually modifies the framebuffer contents:  */          /*  See if a write actually modifies the framebuffer contents:  */
820          if (writeflag == MEM_WRITE) {          if (writeflag == MEM_WRITE) {
821                  for (i=0; i<len; i++) {                  for (i=0; i<len; i++) {
# Line 945  struct vfb_data *dev_fb_init(struct mach Line 1011  struct vfb_data *dev_fb_init(struct mach
1011                          }                          }
1012          }          }
1013    
1014          snprintf(title, sizeof(title), "GXemul: %ix%ix%i %s framebuffer",          /*  Don't set the title to include the size of the framebuffer for
1015              d->visible_xsize, d->visible_ysize, d->bit_depth, name);              VGA, since then the resolution might change during runtime.  */
1016            if (strcmp(name, "VGA") == 0)
1017                    snprintf(title, sizeof(title),"GXemul: %s framebuffer", name);
1018            else
1019                    snprintf(title, sizeof(title),"GXemul: %ix%ix%i %s framebuffer",
1020                        d->visible_xsize, d->visible_ysize, d->bit_depth, name);
1021          title[sizeof(title)-1] = '\0';          title[sizeof(title)-1] = '\0';
1022    
1023  #ifdef WITH_X11  #ifdef WITH_X11
# Line 968  struct vfb_data *dev_fb_init(struct mach Line 1039  struct vfb_data *dev_fb_init(struct mach
1039          if ((baseaddr & 0xfff) == 0)          if ((baseaddr & 0xfff) == 0)
1040                  flags = MEM_BINTRANS_OK | MEM_BINTRANS_WRITE_OK;                  flags = MEM_BINTRANS_OK | MEM_BINTRANS_WRITE_OK;
1041    
1042            flags |= MEM_READING_HAS_NO_SIDE_EFFECTS;
1043    
1044          memory_device_register(mem, name2, baseaddr, size, dev_fb_access,          memory_device_register(mem, name2, baseaddr, size, dev_fb_access,
1045              d, flags, d->framebuffer);              d, flags, d->framebuffer);
1046    
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