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vga: Add mechanism to force the use of a shadow surface 

This prevents surface sharing which will be necessary to
fix cirrus HW cursor support.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Benjamin Herrenschmidt 2014-07-07 10:17:44 +10:00 committed by Gerd Hoffmann
parent dfa9c2a0f4
commit 5508099397
2 changed files with 16 additions and 2 deletions
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17
hw/display/vga.c
View File

@ -1436,6 +1436,7 @@ static void vga_draw_graphic(VGACommonState *s, int full_update)
uint8_t *d;
uint32_t v, addr1, addr;
vga_draw_line_func *vga_draw_line = NULL;
bool share_surface;
#ifdef HOST_WORDS_BIGENDIAN
bool byteswap = !s->big_endian_fb;
#else
@ -1479,21 +1480,33 @@ static void vga_draw_graphic(VGACommonState *s, int full_update)
}
depth = s->get_bpp(s);
share_surface = (!s->force_shadow) &&
( depth == 32 || (depth == 16 && !byteswap) );
if (s->line_offset != s->last_line_offset ||
disp_width != s->last_width ||
height != s->last_height ||
s->last_depth != depth ||
s->last_byteswap != byteswap) {
if (depth == 32 || (depth == 16 && !byteswap)) {
s->last_byteswap != byteswap ||
share_surface != is_buffer_shared(surface)) {
if (share_surface) {
pixman_format_code_t format =
qemu_default_pixman_format(depth, !byteswap);
surface = qemu_create_displaysurface_from(disp_width,
height, format, s->line_offset,
s->vram_ptr + (s->start_addr * 4));
dpy_gfx_replace_surface(s->con, surface);
#ifdef DEBUG_VGA
printf("VGA: Using shared surface for depth=%d swap=%d\n",
depth, byteswap);
#endif
} else {
qemu_console_resize(s->con, disp_width, height);
surface = qemu_console_surface(s->con);
#ifdef DEBUG_VGA
printf("VGA: Using shadow surface for depth=%d swap=%d\n",
depth, byteswap);
#endif
}
s->last_scr_width = disp_width;
s->last_scr_height = height;

1
hw/display/vga_int.h
View File

@ -151,6 +151,7 @@ typedef struct VGACommonState {
uint32_t last_scr_width, last_scr_height; /* in pixels */
uint32_t last_depth; /* in bits */
bool last_byteswap;
bool force_shadow;
uint8_t cursor_start, cursor_end;
bool cursor_visible_phase;
int64_t cursor_blink_time;