4377: drawVertices crashes when shader+colorfilter in the paint
Fix memory corruption that is result of static_casting SkFilterShaderContext*
to SkTriColorShaderContext* and then changing it's state using setup()
SkTriColorShader and it's Context could be wrapped by Compose, 3DShader and
SkFilterShader, but the link SkTriColorShaderContext -> SkTriColorShader
(fShader) always remain - so this way, data about triangle is propagated.
BUG=4377
Didn't add new unit test - it would be redundant since the GM vertices update here: https://codereview.chromium.org/1361173003/ is covering the bug. With this patch it passes.
Review URL: https://codereview.chromium.org/1431713003
1 file changed