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authorGerd Hoffmann <kraxel@redhat.com>2011-10-21 15:59:07 +0200
committerGerd Hoffmann <kraxel@redhat.com>2011-11-01 12:11:53 +0100
commit0e2487bd6f56445b43307536a465ee2ba810aed9 (patch)
tree150e9f1e3b6b4204c59e7125dd59d31c1375f41c /hw/qxl-render.c
parentff74c5a9a91c6dbf1017195462aa4176f7381240 (diff)
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qxl: stride fixup
spice uses negative stride value to signal the bitmap is upside down. The qxl renderer (used for scl, vnc and screenshots) wants a positive value because it is easier to work with. The positive value is then stored in the very same variable, which has the drawback that the upside-down test works only once. Fix by using two variables. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'hw/qxl-render.c')
-rw-r--r--hw/qxl-render.c23
1 files changed, 12 insertions, 11 deletions
diff --git a/hw/qxl-render.c b/hw/qxl-render.c
index c290739..a567693 100644
--- a/hw/qxl-render.c
+++ b/hw/qxl-render.c
@@ -28,16 +28,16 @@ static void qxl_flip(PCIQXLDevice *qxl, QXLRect *rect)
int len, i;
src += (qxl->guest_primary.surface.height - rect->top - 1) *
- qxl->guest_primary.stride;
- dst += rect->top * qxl->guest_primary.stride;
+ qxl->guest_primary.abs_stride;
+ dst += rect->top * qxl->guest_primary.abs_stride;
src += rect->left * qxl->guest_primary.bytes_pp;
dst += rect->left * qxl->guest_primary.bytes_pp;
len = (rect->right - rect->left) * qxl->guest_primary.bytes_pp;
for (i = rect->top; i < rect->bottom; i++) {
memcpy(dst, src, len);
- dst += qxl->guest_primary.stride;
- src -= qxl->guest_primary.stride;
+ dst += qxl->guest_primary.abs_stride;
+ src -= qxl->guest_primary.abs_stride;
}
}
@@ -45,7 +45,8 @@ void qxl_render_resize(PCIQXLDevice *qxl)
{
QXLSurfaceCreate *sc = &qxl->guest_primary.surface;
- qxl->guest_primary.stride = sc->stride;
+ qxl->guest_primary.qxl_stride = sc->stride;
+ qxl->guest_primary.abs_stride = abs(sc->stride);
qxl->guest_primary.resized++;
switch (sc->format) {
case SPICE_SURFACE_FMT_16_555:
@@ -87,11 +88,11 @@ void qxl_render_update(PCIQXLDevice *qxl)
qemu_free_displaysurface(vga->ds);
qxl->guest_primary.data = memory_region_get_ram_ptr(&qxl->vga.vram);
- if (qxl->guest_primary.stride < 0) {
+ if (qxl->guest_primary.qxl_stride < 0) {
/* spice surface is upside down -> need extra buffer to flip */
- qxl->guest_primary.stride = -qxl->guest_primary.stride;
- qxl->guest_primary.flipped = g_malloc(qxl->guest_primary.surface.width *
- qxl->guest_primary.stride);
+ qxl->guest_primary.flipped =
+ g_malloc(qxl->guest_primary.surface.width *
+ qxl->guest_primary.abs_stride);
ptr = qxl->guest_primary.flipped;
} else {
ptr = qxl->guest_primary.data;
@@ -100,7 +101,7 @@ void qxl_render_update(PCIQXLDevice *qxl)
__FUNCTION__,
qxl->guest_primary.surface.width,
qxl->guest_primary.surface.height,
- qxl->guest_primary.stride,
+ qxl->guest_primary.qxl_stride,
qxl->guest_primary.bytes_pp,
qxl->guest_primary.bits_pp,
qxl->guest_primary.flipped ? "yes" : "no");
@@ -108,7 +109,7 @@ void qxl_render_update(PCIQXLDevice *qxl)
qemu_create_displaysurface_from(qxl->guest_primary.surface.width,
qxl->guest_primary.surface.height,
qxl->guest_primary.bits_pp,
- qxl->guest_primary.stride,
+ qxl->guest_primary.abs_stride,
ptr);
dpy_resize(vga->ds);
}