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ui/pixman: add qemu_pixman_check_format

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Convinience check_format function for UIs using pixman.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2015-01-09 08:49:20 +01:00
parent 49743df399
commit 8cd996f493
2 changed files with 29 additions and 0 deletions
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2
include/ui/qemu-pixman.h
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@ -37,6 +37,8 @@ PixelFormat qemu_pixelformat_from_pixman(pixman_format_code_t format);
pixman_format_code_t qemu_default_pixman_format(int bpp, bool native_endian);
int qemu_pixman_get_type(int rshift, int gshift, int bshift);
pixman_format_code_t qemu_pixman_get_format(PixelFormat *pf);
bool qemu_pixman_check_format(DisplayChangeListener *dcl,
pixman_format_code_t format);
pixman_image_t *qemu_pixman_linebuf_create(pixman_format_code_t format,
int width);

27
ui/qemu-pixman.c
View file

@ -125,6 +125,33 @@ pixman_format_code_t qemu_pixman_get_format(PixelFormat *pf)
return format;
}
/*
* Return true for known-good pixman conversions.
*
* UIs using pixman for format conversion can hook this into
* DisplayChangeListenerOps->dpy_gfx_check_format
*/
bool qemu_pixman_check_format(DisplayChangeListener *dcl,
pixman_format_code_t format)
{
switch (format) {
/* 32 bpp */
case PIXMAN_x8r8g8b8:
case PIXMAN_a8r8g8b8:
case PIXMAN_b8g8r8x8:
case PIXMAN_b8g8r8a8:
/* 24 bpp */
case PIXMAN_r8g8b8:
case PIXMAN_b8g8r8:
/* 16 bpp */
case PIXMAN_x1r5g5b5:
case PIXMAN_r5g6b5:
return true;
default:
return false;
}
}
pixman_image_t *qemu_pixman_linebuf_create(pixman_format_code_t format,
int width)
{