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                 __func__, xpm[line]);
  23         return NULL;
  24     }
  25     if (chars != 1) {
  26         fprintf(stderr, "%s: chars != 1 not supported\n", __func__);
  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                 __func__, 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     return cursor_parse_xpm(cursor_hidden_xpm);
  85 }
  86
  87 QEMUCursor *cursor_builtin_left_ptr(void)
  88 {
  89     return cursor_parse_xpm(cursor_left_ptr_xpm);
  90 }
  91
  92 QEMUCursor *cursor_alloc(int width, int height)
  93 {
  94     QEMUCursor *c;
  95     int datasize = width * height * sizeof(uint32_t);
  96
  97     c = g_malloc0(sizeof(QEMUCursor) + datasize);
  98     c->width  = width;
  99     c->height = height;
 100     c->refcount = 1;
 101     return c;
 102 }
 103
 104 void cursor_get(QEMUCursor *c)
 105 {
 106     c->refcount++;
 107 }
 108
 109 void cursor_put(QEMUCursor *c)
 110 {
 111     if (c == NULL)
 112         return;
 113     c->refcount--;
 114     if (c->refcount)
 115         return;
 116     g_free(c);
 117 }
 118
 119 int cursor_get_mono_bpl(QEMUCursor *c)
 120 {
 121     return DIV_ROUND_UP(c->width, 8);
 122 }
 123
 124 void cursor_set_mono(QEMUCursor *c,
 125                      uint32_t foreground, uint32_t background, uint8_t *image,
 126                      int transparent, uint8_t *mask)
 127 {
 128     uint32_t *data = c->data;
 129     uint8_t bit;
 130     int x,y,bpl;
 131
 132     bpl = cursor_get_mono_bpl(c);
 133     for (y = 0; y < c->height; y++) {
 134         bit = 0x80;
 135         for (x = 0; x < c->width; x++, data++) {
 136             if (transparent && mask[x/8] & bit) {
 137                 *data = 0x00000000;
 138             } else if (!transparent && !(mask[x/8] & bit)) {
 139                 *data = 0x00000000;
 140             } else if (image[x/8] & bit) {
 141                 *data = 0xff000000 | foreground;
 142             } else {
 143                 *data = 0xff000000 | background;
 144             }
 145             bit >>= 1;
 146             if (bit == 0) {
 147                 bit = 0x80;
 148             }
 149         }
 150         mask  += bpl;
 151         image += bpl;
 152     }
 153 }
 154
 155 void cursor_get_mono_image(QEMUCursor *c, int foreground, uint8_t *image)
 156 {
 157     uint32_t *data = c->data;
 158     uint8_t bit;
 159     int x,y,bpl;
 160
 161     bpl = cursor_get_mono_bpl(c);
 162     memset(image, 0, bpl * c->height);
 163     for (y = 0; y < c->height; y++) {
 164         bit = 0x80;
 165         for (x = 0; x < c->width; x++, data++) {
 166             if (((*data & 0xff000000) == 0xff000000) &&
 167                 ((*data & 0x00ffffff) == foreground)) {
 168                 image[x/8] |= bit;
 169             }
 170             bit >>= 1;
 171             if (bit == 0) {
 172                 bit = 0x80;
 173             }
 174         }
 175         image += bpl;
 176     }
 177 }
 178
 179 void cursor_get_mono_mask(QEMUCursor *c, int transparent, uint8_t *mask)
 180 {
 181     uint32_t *data = c->data;
 182     uint8_t bit;
 183     int x,y,bpl;
 184
 185     bpl = cursor_get_mono_bpl(c);
 186     memset(mask, 0, bpl * c->height);
 187     for (y = 0; y < c->height; y++) {
 188         bit = 0x80;
 189         for (x = 0; x < c->width; x++, data++) {
 190             if ((*data & 0xff000000) != 0xff000000) {
 191                 if (transparent != 0) {
 192                     mask[x/8] |= bit;
 193                 }
 194             } else {
 195                 if (transparent == 0) {
 196                     mask[x/8] |= bit;
 197                 }
 198             }
 199             bit >>= 1;
 200             if (bit == 0) {
 201                 bit = 0x80;
 202             }
 203         }
 204         mask += bpl;
 205     }
 206 }