ui/cursor.c

   1 #include "qemu/osdep.h"
   2 #include "qemu-common.h"
   3 #include "ui/console.h"
   4
   5 #include "cursor_hidden.xpm"
   6 #include "cursor_left_ptr.xpm"
   7
   8 /* for creating built-in cursors */
   9 static QEMUCursor *cursor_parse_xpm(const char *xpm[])
  10 {
  11     QEMUCursor *c;
  12     uint32_t ctab[128];
  13     unsigned int width, height, colors, chars;
  14     unsigned int line = 0, i, r, g, b, x, y, pixel;
  15     char name[16];
  16     uint8_t idx;
  17
  18     /* parse header line: width, height, #colors, #chars */
  19     if (sscanf(xpm[line], "%u %u %u %u",
  20                &width, &height, &colors, &chars) != 4) {
  21         fprintf(stderr, "%s: header parse error: \"%s\"\n",
  22                 __FUNCTION__, xpm[line]);
  23         return NULL;
  24     }
  25     if (chars != 1) {
  26         fprintf(stderr, "%s: chars != 1 not supported\n", __FUNCTION__);
  27         return NULL;
  28     }
  29     line++;
  30
  31     /* parse color table */
  32     for (i = 0; i < colors; i++, line++) {
  33         if (sscanf(xpm[line], "%c c %15s", &idx, name) == 2) {
  34             if (sscanf(name, "#%02x%02x%02x", &r, &g, &b) == 3) {
  35                 ctab[idx] = (0xff << 24) | (b << 16) | (g << 8) | r;
  36                 continue;
  37             }
  38             if (strcmp(name, "None") == 0) {
  39                 ctab[idx] = 0x00000000;
  40                 continue;
  41             }
  42         }
  43         fprintf(stderr, "%s: color parse error: \"%s\"\n",
  44                 __FUNCTION__, xpm[line]);
  45         return NULL;
  46     }
  47
  48     /* parse pixel data */
  49     c = cursor_alloc(width, height);
  50     for (pixel = 0, y = 0; y < height; y++, line++) {
  51         for (x = 0; x < height; x++, pixel++) {
  52             idx = xpm[line][x];
  53             c->data[pixel] = ctab[idx];
  54         }
  55     }
  56     return c;
  57 }
  58
  59 /* nice for debugging */
  60 void cursor_print_ascii_art(QEMUCursor *c, const char *prefix)
  61 {
  62     uint32_t *data = c->data;
  63     int x,y;
  64
  65     for (y = 0; y < c->height; y++) {
  66         fprintf(stderr, "%s: %2d: |", prefix, y);
  67         for (x = 0; x < c->width; x++, data++) {
  68             if ((*data & 0xff000000) != 0xff000000) {
  69                 fprintf(stderr, " "); /* transparent */
  70             } else if ((*data & 0x00ffffff) == 0x00ffffff) {
  71                 fprintf(stderr, "."); /* white */
  72             } else if ((*data & 0x00ffffff) == 0x00000000) {
  73                 fprintf(stderr, "X"); /* black */
  74             } else {
  75                 fprintf(stderr, "o"); /* other */
  76             }
  77         }
  78         fprintf(stderr, "|\n");
  79     }
  80 }
  81
  82 QEMUCursor *cursor_builtin_hidden(void)
  83 {
  84     QEMUCursor *c;
  85
  86     c = cursor_parse_xpm(cursor_hidden_xpm);
  87     return c;
  88 }
  89
  90 QEMUCursor *cursor_builtin_left_ptr(void)
  91 {
  92     QEMUCursor *c;
  93
  94     c = cursor_parse_xpm(cursor_left_ptr_xpm);
  95     return c;
  96 }
  97
  98 QEMUCursor *cursor_alloc(int width, int height)
  99 {
 100     QEMUCursor *c;
 101     int datasize = width * height * sizeof(uint32_t);
 102
 103     c = g_malloc0(sizeof(QEMUCursor) + datasize);
 104     c->width  = width;
 105     c->height = height;
 106     c->refcount = 1;
 107     return c;
 108 }
 109
 110 void cursor_get(QEMUCursor *c)
 111 {
 112     c->refcount++;
 113 }
 114
 115 void cursor_put(QEMUCursor *c)
 116 {
 117     if (c == NULL)
 118         return;
 119     c->refcount--;
 120     if (c->refcount)
 121         return;
 122     g_free(c);
 123 }
 124
 125 int cursor_get_mono_bpl(QEMUCursor *c)
 126 {
 127     return (c->width + 7) / 8;
 128 }
 129
 130 void cursor_set_mono(QEMUCursor *c,
 131                      uint32_t foreground, uint32_t background, uint8_t *image,
 132                      int transparent, uint8_t *mask)
 133 {
 134     uint32_t *data = c->data;
 135     uint8_t bit;
 136     int x,y,bpl;
 137
 138     bpl = cursor_get_mono_bpl(c);
 139     for (y = 0; y < c->height; y++) {
 140         bit = 0x80;
 141         for (x = 0; x < c->width; x++, data++) {
 142             if (transparent && mask[x/8] & bit) {
 143                 *data = 0x00000000;
 144             } else if (!transparent && !(mask[x/8] & bit)) {
 145                 *data = 0x00000000;
 146             } else if (image[x/8] & bit) {
 147                 *data = 0xff000000 | foreground;
 148             } else {
 149                 *data = 0xff000000 | background;
 150             }
 151             bit >>= 1;
 152             if (bit == 0) {
 153                 bit = 0x80;
 154             }
 155         }
 156         mask  += bpl;
 157         image += bpl;
 158     }
 159 }
 160
 161 void cursor_get_mono_image(QEMUCursor *c, int foreground, uint8_t *image)
 162 {
 163     uint32_t *data = c->data;
 164     uint8_t bit;
 165     int x,y,bpl;
 166
 167     bpl = cursor_get_mono_bpl(c);
 168     memset(image, 0, bpl * c->height);
 169     for (y = 0; y < c->height; y++) {
 170         bit = 0x80;
 171         for (x = 0; x < c->width; x++, data++) {
 172             if (((*data & 0xff000000) == 0xff000000) &&
 173                 ((*data & 0x00ffffff) == foreground)) {
 174                 image[x/8] |= bit;
 175             }
 176             bit >>= 1;
 177             if (bit == 0) {
 178                 bit = 0x80;
 179             }
 180         }
 181         image += bpl;
 182     }
 183 }
 184
 185 void cursor_get_mono_mask(QEMUCursor *c, int transparent, uint8_t *mask)
 186 {
 187     uint32_t *data = c->data;
 188     uint8_t bit;
 189     int x,y,bpl;
 190
 191     bpl = cursor_get_mono_bpl(c);
 192     memset(mask, 0, bpl * c->height);
 193     for (y = 0; y < c->height; y++) {
 194         bit = 0x80;
 195         for (x = 0; x < c->width; x++, data++) {
 196             if ((*data & 0xff000000) != 0xff000000) {
 197                 if (transparent != 0) {
 198                     mask[x/8] |= bit;
 199                 }
 200             } else {
 201                 if (transparent == 0) {
 202                     mask[x/8] |= bit;
 203                 }
 204             }
 205             bit >>= 1;
 206             if (bit == 0) {
 207                 bit = 0x80;
 208             }
 209         }
 210         mask += bpl;
 211     }
 212 }