Added function SkCanvas::drawPatch to the API. This function
receives the patch to draw and the paint.
Added function SkBaseDevice::drawPatch to the API. This function also receives the patch to draw and the paint.
Currently SkGpuDevice and SkBitmapDevice generate the mesh taking into
account the scale factor and call the corresponding device's drawVertices.
BUG=skia:
R=jvanverth@google.com, egdaniel@google.com, bsalomon@google.com
Author: dandov@google.com
Review URL: https://codereview.chromium.org/424663006
Each patch defines a method genMesh that produces the geometry to draw. To do this they receive a SkPatchMesh object which they need to initialize in order to set up how the data is going to be formatted. Later they call function like setColor or pointAt to set the values at a specific index, the SkMeshPatch object handles the indices based on the format and makes it transparent to the client.
Added a slide to sample app to show how to set up this classes and how they interact.
BUG=skia:
R=jvanverth@google.com, egdaniel@google.com, bsalomon@google.com
Author: dandov@google.com
Review URL: https://codereview.chromium.org/405163003
