qemu-pixman.c

   1 /*
   2  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   3  * See the COPYING file in the top-level directory.
   4  */
   5
   6 #include "qemu-pixman.h"
   7
   8 int qemu_pixman_get_type(int rshift, int gshift, int bshift)
   9 {
  10     int type = PIXMAN_TYPE_OTHER;
  11
  12     if (rshift > gshift && gshift > bshift) {
  13         if (bshift == 0) {
  14             type = PIXMAN_TYPE_ARGB;
  15         } else {
  16 #if PIXMAN_VERSION >= PIXMAN_VERSION_ENCODE(0, 21, 8)
  17             type = PIXMAN_TYPE_RGBA;
  18 #endif
  19         }
  20     } else if (rshift < gshift && gshift < bshift) {
  21         if (rshift == 0) {
  22             type = PIXMAN_TYPE_ABGR;
  23         } else {
  24             type = PIXMAN_TYPE_BGRA;
  25         }
  26     }
  27     return type;
  28 }
  29
  30 pixman_format_code_t qemu_pixman_get_format(PixelFormat *pf)
  31 {
  32     pixman_format_code_t format;
  33     int type;
  34
  35     type = qemu_pixman_get_type(pf->rshift, pf->gshift, pf->bshift);
  36     format = PIXMAN_FORMAT(pf->bits_per_pixel, type,
  37                            pf->abits, pf->rbits, pf->gbits, pf->bbits);
  38     if (!pixman_format_supported_source(format)) {
  39         return 0;
  40     }
  41     return format;
  42 }
  43
  44 pixman_image_t *qemu_pixman_linebuf_create(pixman_format_code_t format,
  45                                            int width)
  46 {
  47     pixman_image_t *image = pixman_image_create_bits(format, width, 1, NULL, 0);
  48     assert(image != NULL);
  49     return image;
  50 }
  51
  52 void qemu_pixman_linebuf_fill(pixman_image_t *linebuf, pixman_image_t *fb,
  53                               int width, int y)
  54 {
  55     pixman_image_composite(PIXMAN_OP_SRC, fb, NULL, linebuf,
  56                            0, y, 0, 0, 0, 0, width, 1);
  57 }
  58
  59 pixman_image_t *qemu_pixman_mirror_create(pixman_format_code_t format,
  60                                           pixman_image_t *image)
  61 {
  62     pixman_image_t *mirror;
  63
  64     mirror = pixman_image_create_bits(format,
  65                                       pixman_image_get_width(image),
  66                                       pixman_image_get_height(image),
  67                                       NULL,
  68                                       pixman_image_get_stride(image));
  69     return mirror;
  70 }
  71
  72 void qemu_pixman_image_unref(pixman_image_t *image)
  73 {
  74     if (image == NULL) {
  75         return;
  76     }
  77     pixman_image_unref(image);
  78 }