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gl/msaa: Properly fall back when using CLEAR operator

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There are some situations that the MSAA compositor doesn't support using
the CLEAR operator. We should properly fall back in those cases.
This commit is contained in:
Martin Robinson 2013-02-06 12:53:14 -08:00
parent 7bee1962f6
commit 400ea9c290
1 changed files with 7 additions and 0 deletions
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7
src/cairo-gl-msaa-compositor.c
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@ -409,6 +409,10 @@ _cairo_gl_msaa_compositor_mask (const cairo_compositor_t *compositor,
if (! can_use_msaa_compositor (dst, CAIRO_ANTIALIAS_DEFAULT))
return CAIRO_INT_STATUS_UNSUPPORTED;
if (composite->op == CAIRO_OPERATOR_CLEAR &&
composite->original_mask_pattern != NULL)
return CAIRO_INT_STATUS_UNSUPPORTED;
/* GL compositing operators cannot properly represent a mask operation
using the SOURCE compositing operator in one pass. This only matters if
there actually is a mask (there isn't in a paint operation) and if the
@ -851,6 +855,9 @@ _cairo_gl_msaa_compositor_glyphs (const cairo_compositor_t *compositor,
if (! dst->supports_stencil)
return CAIRO_INT_STATUS_UNSUPPORTED;
if (composite->op == CAIRO_OPERATOR_CLEAR)
return CAIRO_INT_STATUS_UNSUPPORTED;
if (composite->is_bounded == FALSE) {
cairo_surface_t* surface = _prepare_unbounded_surface (dst);