cursor.c

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