diff options
| author | Vladimir Vukicevic <vladimir@pobox.com> | 2006-02-17 23:37:54 -0800 |
|---|---|---|
| committer | Behdad Esfahbod <behdad@home.(none)> | 2006-03-15 11:53:43 -0500 |
| commit | 9acc981e440bdf370aee25cc5ea2b836db0886b1 (patch) | |
| tree | 0fbe530b93f12c6deff9e322d1420e67cbb51e2f | |
| parent | ec4b006c162292ea3b2719dc18a4a3bd40a971ab (diff) | |
| download | cairo-9acc981e440bdf370aee25cc5ea2b836db0886b1.tar.gz | |
Win32: Handle BitBlt in get_image failure and AlphaBlend not being supported
If the BitBlt in get_image fails, we pretty much can't do anything -- so
fill the destination with white and hope for the best. This enables
somewhat accurate printing of complex operations. Also, check the
destination device caps before calling AlphaBlend; return UNSUPPORTED if
the destination DC can't do AlphaBlend.
(cherry picked from 9831de538e347a624af5b0ca38242b198b64bd45 commit)
(cherry picked from 1a1441912604c89e2912ec764fe26b7a9db995a3 commit)
| -rw-r--r-- | src/cairo-win32-surface.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/src/cairo-win32-surface.c b/src/cairo-win32-surface.c index 84105e53b..b00251c97 100644 --- a/src/cairo-win32-surface.c +++ b/src/cairo-win32-surface.c @@ -385,8 +385,18 @@ _cairo_win32_surface_get_subimage (cairo_win32_surface_t *surface, width, height, surface->dc, x, y, - SRCCOPY)) - goto FAIL; + SRCCOPY)) { + /* If we fail to BitBlt here, most likely the source is a printer. + * You can't reliably get bits from a printer DC, so just fill in + * the surface as white (common case for printing). + */ + + RECT r; + r.left = r.top = 0; + r.right = width; + r.bottom = height; + FillRect(local->dc, &r, (HBRUSH)GetStockObject(WHITE_BRUSH)); + } *local_out = local; @@ -601,6 +611,8 @@ _composite_alpha_blend (cairo_win32_surface_t *dst, if (alpha_blend == NULL) return CAIRO_INT_STATUS_UNSUPPORTED; + if (GetDeviceCaps(dst->dc, SHADEBLENDCAPS) == SB_NONE) + return CAIRO_INT_STATUS_UNSUPPORTED; blend_function.BlendOp = AC_SRC_OVER; blend_function.BlendFlags = 0; @@ -934,7 +946,7 @@ _cairo_win32_surface_set_clip_region (void *abstract_surface, return CAIRO_STATUS_NO_MEMORY; /* Combine the new region with the original clip */ - + if (surface->saved_clip) { if (CombineRgn (gdi_region, gdi_region, surface->saved_clip, RGN_AND) == ERROR) goto FAIL; |