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console: add qemu_pixelformat_from_pixman 

Function to convert pixman format codes to qemu PixelFormat.

[ Benjamin Herrenschmidt: fix BGRA+RGBA shifts ]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
master
Gerd Hoffmann 2014-06-18 09:00:00 +02:00
parent fd884c0765
commit a93a3af9ec
2 changed files with 57 additions and 0 deletions
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1
include/ui/qemu-pixman.h
View File

@ -33,6 +33,7 @@
/* -------------------------------------------------------------------- */
PixelFormat qemu_pixelformat_from_pixman(pixman_format_code_t format);
int qemu_pixman_get_type(int rshift, int gshift, int bshift);
pixman_format_code_t qemu_pixman_get_format(PixelFormat *pf);

56
ui/qemu-pixman.c
View File

@ -6,6 +6,62 @@
#include "qemu-common.h"
#include "ui/console.h"
PixelFormat qemu_pixelformat_from_pixman(pixman_format_code_t format)
{
PixelFormat pf;
uint8_t bpp;
bpp = pf.bits_per_pixel = PIXMAN_FORMAT_BPP(format);
pf.bytes_per_pixel = PIXMAN_FORMAT_BPP(format) / 8;
pf.depth = PIXMAN_FORMAT_DEPTH(format);
pf.abits = PIXMAN_FORMAT_A(format);
pf.rbits = PIXMAN_FORMAT_R(format);
pf.gbits = PIXMAN_FORMAT_G(format);
pf.bbits = PIXMAN_FORMAT_B(format);
switch (PIXMAN_FORMAT_TYPE(format)) {
case PIXMAN_TYPE_ARGB:
pf.ashift = pf.bbits + pf.gbits + pf.rbits;
pf.rshift = pf.bbits + pf.gbits;
pf.gshift = pf.bbits;
pf.bshift = 0;
break;
case PIXMAN_TYPE_ABGR:
pf.ashift = pf.rbits + pf.gbits + pf.bbits;
pf.bshift = pf.rbits + pf.gbits;
pf.gshift = pf.rbits;
pf.rshift = 0;
break;
case PIXMAN_TYPE_BGRA:
pf.bshift = bpp - pf.bbits;
pf.gshift = bpp - (pf.bbits + pf.gbits);
pf.rshift = bpp - (pf.bbits + pf.gbits + pf.rbits);
pf.ashift = 0;
break;
case PIXMAN_TYPE_RGBA:
pf.rshift = bpp - pf.rbits;
pf.gshift = bpp - (pf.rbits + pf.gbits);
pf.bshift = bpp - (pf.rbits + pf.gbits + pf.bbits);
pf.ashift = 0;
break;
default:
g_assert_not_reached();
break;
}
pf.amax = (1 << pf.abits) - 1;
pf.rmax = (1 << pf.rbits) - 1;
pf.gmax = (1 << pf.gbits) - 1;
pf.bmax = (1 << pf.bbits) - 1;
pf.amask = pf.amax << pf.ashift;
pf.rmask = pf.rmax << pf.rshift;
pf.gmask = pf.gmax << pf.gshift;
pf.bmask = pf.bmax << pf.bshift;
return pf;
}
int qemu_pixman_get_type(int rshift, int gshift, int bshift)
{
int type = PIXMAN_TYPE_OTHER;