d2ec7e24a2
Add some helper functions which will be put into use by following patches. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
#include "qemu-pixman.h"
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int qemu_pixman_get_type(int rshift, int gshift, int bshift)
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{
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int type = PIXMAN_TYPE_OTHER;
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if (rshift > gshift && gshift > bshift) {
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if (bshift == 0) {
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type = PIXMAN_TYPE_ARGB;
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} else {
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#if PIXMAN_VERSION >= PIXMAN_VERSION_ENCODE(0, 21, 8)
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type = PIXMAN_TYPE_RGBA;
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#endif
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}
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} else if (rshift < gshift && gshift < bshift) {
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if (rshift == 0) {
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type = PIXMAN_TYPE_ABGR;
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} else {
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type = PIXMAN_TYPE_BGRA;
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}
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}
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return type;
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}
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pixman_format_code_t qemu_pixman_get_format(PixelFormat *pf)
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{
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pixman_format_code_t format;
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int type;
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type = qemu_pixman_get_type(pf->rshift, pf->gshift, pf->bshift);
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format = PIXMAN_FORMAT(pf->bits_per_pixel, type,
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pf->abits, pf->rbits, pf->gbits, pf->bbits);
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if (!pixman_format_supported_source(format)) {
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return 0;
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}
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return format;
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}
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pixman_image_t *qemu_pixman_linebuf_create(pixman_format_code_t format,
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int width)
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{
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pixman_image_t *image = pixman_image_create_bits(format, width, 1, NULL, 0);
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assert(image != NULL);
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return image;
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}
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void qemu_pixman_linebuf_fill(pixman_image_t *linebuf, pixman_image_t *fb,
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int width, int y)
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{
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pixman_image_composite(PIXMAN_OP_SRC, fb, NULL, linebuf,
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0, y, 0, 0, 0, 0, width, 1);
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}
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void qemu_pixman_image_unref(pixman_image_t *image)
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{
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if (image == NULL) {
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return;
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}
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pixman_image_unref(image);
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}
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