SkCanvas* PictureRenderer::setupCanvas(int width, int height) {
SkAutoTUnref<SkCanvas> canvas;
switch(fDeviceType) {
case kBitmap_DeviceType: {
SkBitmap bitmap;
sk_tools::setup_bitmap(&bitmap, width, height);
canvas.reset(SkNEW_ARGS(SkCanvas, (bitmap)));
}
break;
#if SK_SUPPORT_GPU
#if SK_ANGLE
case kAngle_DeviceType:
// fall through
#endif
#if SK_MESA
case kMesa_DeviceType:
// fall through
#endif
case kGPU_DeviceType:
case kNVPR_DeviceType: {
SkAutoTUnref<GrSurface> target;
if (fGrContext) {
// create a render target to back the device
GrSurfaceDesc desc;
desc.fConfig = kSkia8888_GrPixelConfig;
desc.fFlags = kRenderTarget_GrSurfaceFlag;
desc.fWidth = width;
desc.fHeight = height;
desc.fSampleCnt = fSampleCount;
target.reset(fGrContext->textureProvider()->createTexture(desc, false, NULL, 0));
}
uint32_t flags = fUseDFText ? SkSurfaceProps::kUseDistanceFieldFonts_Flag : 0;
SkSurfaceProps props(flags, SkSurfaceProps::kLegacyFontHost_InitType);
SkAutoTUnref<SkGpuDevice> device(
SkGpuDevice::Create(target->asRenderTarget(), &props,
SkGpuDevice::kUninit_InitContents));
if (!device) {
return NULL;
}
canvas.reset(SkNEW_ARGS(SkCanvas, (device)));
break;
}
#endif
default:
SkASSERT(0);
return NULL;
}
if (fHasDrawFilters) {
if (fDrawFilters[0] & PictureRenderer::kAAClip_DrawFilterFlag) {
canvas->setAllowSoftClip(false);
}
canvas.reset(SkNEW_ARGS(FlagsFilterCanvas, (canvas.get(), fDrawFilters)));
}
this->scaleToScaleFactor(canvas);
// Pictures often lie about their extent (i.e., claim to be 100x100 but
// only ever draw to 90x100). Clear here so the undrawn portion will have
// a consistent color
canvas->clear(SK_ColorTRANSPARENT);
return canvas.detach();
}
