diff options
| author | Wolfgang Bumiller <w.bumiller@proxmox.com> | 2017-01-24 16:35:38 +0100 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2017-02-01 09:43:09 +0100 |
| commit | 5858dd1801883309bdd208d72ddb81c4e9fee30c (patch) | |
| tree | 94679d98738c12d65a552c0066af7259167d98f6 /hw/display/cirrus_vga.c | |
| parent | f153b563f8cf121aebf5a2fff5f0110faf58ccb3 (diff) | |
cirrus: allow zero source pitch in pattern fill rops
The rops used by cirrus_bitblt_common_patterncopy only use
the destination pitch, so the source pitch shoul allowed to
be zero and the blit with used for the range check around the
source address.
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
Message-id: 1485272138-23249-1-git-send-email-w.bumiller@proxmox.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'hw/display/cirrus_vga.c')
| -rw-r--r-- | hw/display/cirrus_vga.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/hw/display/cirrus_vga.c b/hw/display/cirrus_vga.c index 0f05e4596e..98f089e4e9 100644 --- a/hw/display/cirrus_vga.c +++ b/hw/display/cirrus_vga.c @@ -272,9 +272,6 @@ static void cirrus_update_memory_access(CirrusVGAState *s); static bool blit_region_is_unsafe(struct CirrusVGAState *s, int32_t pitch, int32_t addr) { - if (!pitch) { - return true; - } if (pitch < 0) { int64_t min = addr + ((int64_t)s->cirrus_blt_height-1) * pitch; @@ -294,8 +291,11 @@ static bool blit_region_is_unsafe(struct CirrusVGAState *s, return false; } -static bool blit_is_unsafe(struct CirrusVGAState *s, bool dst_only) +static bool blit_is_unsafe(struct CirrusVGAState *s, bool dst_only, + bool zero_src_pitch_ok) { + int32_t check_pitch; + /* should be the case, see cirrus_bitblt_start */ assert(s->cirrus_blt_width > 0); assert(s->cirrus_blt_height > 0); @@ -304,6 +304,10 @@ static bool blit_is_unsafe(struct CirrusVGAState *s, bool dst_only) return true; } + if (!s->cirrus_blt_dstpitch) { + return true; + } + if (blit_region_is_unsafe(s, s->cirrus_blt_dstpitch, s->cirrus_blt_dstaddr & s->cirrus_addr_mask)) { return true; @@ -311,7 +315,13 @@ static bool blit_is_unsafe(struct CirrusVGAState *s, bool dst_only) if (dst_only) { return false; } - if (blit_region_is_unsafe(s, s->cirrus_blt_srcpitch, + + check_pitch = s->cirrus_blt_srcpitch; + if (!zero_src_pitch_ok && !check_pitch) { + check_pitch = s->cirrus_blt_width; + } + + if (blit_region_is_unsafe(s, check_pitch, s->cirrus_blt_srcaddr & s->cirrus_addr_mask)) { return true; } @@ -681,8 +691,9 @@ static int cirrus_bitblt_common_patterncopy(CirrusVGAState * s, dst = s->vga.vram_ptr + (s->cirrus_blt_dstaddr & s->cirrus_addr_mask); - if (blit_is_unsafe(s, false)) + if (blit_is_unsafe(s, false, true)) { return 0; + } (*s->cirrus_rop) (s, dst, src, s->cirrus_blt_dstpitch, 0, @@ -699,7 +710,7 @@ static int cirrus_bitblt_solidfill(CirrusVGAState *s, int blt_rop) { cirrus_fill_t rop_func; - if (blit_is_unsafe(s, true)) { + if (blit_is_unsafe(s, true, true)) { return 0; } rop_func = cirrus_fill[rop_to_index[blt_rop]][s->cirrus_blt_pixelwidth - 1]; @@ -803,7 +814,7 @@ static int cirrus_do_copy(CirrusVGAState *s, int dst, int src, int w, int h) static int cirrus_bitblt_videotovideo_copy(CirrusVGAState * s) { - if (blit_is_unsafe(s, false)) + if (blit_is_unsafe(s, false, false)) return 0; return cirrus_do_copy(s, s->cirrus_blt_dstaddr - s->vga.start_addr, |