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 #if PIXMAN_VERSION >= PIXMAN_VERSION_ENCODE(0, 21, 8)
  25             type = PIXMAN_TYPE_BGRA;
  26 #endif
  27         }
  28     }
  29     return type;
  30 }
  31
  32 pixman_format_code_t qemu_pixman_get_format(PixelFormat *pf)
  33 {
  34     pixman_format_code_t format;
  35     int type;
  36
  37     type = qemu_pixman_get_type(pf->rshift, pf->gshift, pf->bshift);
  38     format = PIXMAN_FORMAT(pf->bits_per_pixel, type,
  39                            pf->abits, pf->rbits, pf->gbits, pf->bbits);
  40     if (!pixman_format_supported_source(format)) {
  41         return 0;
  42     }
  43     return format;
  44 }
  45
  46 pixman_image_t *qemu_pixman_linebuf_create(pixman_format_code_t format,
  47                                            int width)
  48 {
  49     pixman_image_t *image = pixman_image_create_bits(format, width, 1, NULL, 0);
  50     assert(image != NULL);
  51     return image;
  52 }
  53
  54 void qemu_pixman_linebuf_fill(pixman_image_t *linebuf, pixman_image_t *fb,
  55                               int width, int y)
  56 {
  57     pixman_image_composite(PIXMAN_OP_SRC, fb, NULL, linebuf,
  58                            0, y, 0, 0, 0, 0, width, 1);
  59 }
  60
  61 pixman_image_t *qemu_pixman_mirror_create(pixman_format_code_t format,
  62                                           pixman_image_t *image)
  63 {
  64     pixman_image_t *mirror;
  65
  66     mirror = pixman_image_create_bits(format,
  67                                       pixman_image_get_width(image),
  68                                       pixman_image_get_height(image),
  69                                       NULL,
  70                                       pixman_image_get_stride(image));
  71     return mirror;
  72 }
  73
  74 void qemu_pixman_image_unref(pixman_image_t *image)
  75 {
  76     if (image == NULL) {
  77         return;
  78     }
  79     pixman_image_unref(image);
  80 }