[NOT FOR COMMIT] Fully replace SkCanvas uses.

skia/ext/cdl_surface.cc

+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "cdl_common.h"
+
+#if CDL_ENABLED
+
+#include "cdl_surface.h"
+
+#include "base/memory/ptr_util.h"
+#include "cdl_canvas.h"
+
+CdlSurface::CdlSurface(sk_sp<SkSurface> surface)
+    : surface_(std::move(surface)) {}
+CdlSurface::~CdlSurface() {}
+
+sk_sp<SkImage> CdlSurface::makeImageSnapshot(SkBudgeted budgeted) {
+  return surface_->makeImageSnapshot(budgeted);
+}
+
+sk_sp<CdlSurface> CdlSurface::MakeRasterDirect(const SkImageInfo& info,
+                                               void* pixels,
+                                               size_t rowBytes,
+                                               const SkSurfaceProps* props) {
+  sk_sp<SkSurface> surface =
+      SkSurface::MakeRasterDirect(info, pixels, rowBytes, props);
+  if (surface.get())
+    return sk_make_sp<CdlSurface>(surface);
+  return nullptr;
+}
+
+/**
+*  The same as NewRasterDirect, but also accepts a call-back routine, which is
+* invoked
+*  when the surface is deleted, and is passed the pixel memory and the specified
+* context.
+*/
+sk_sp<CdlSurface> CdlSurface::MakeRasterDirectReleaseProc(
+    const SkImageInfo& info,
+    void* pixels,
+    size_t rowBytes,
+    void (*releaseProc)(void* pixels, void* context),
+    void* context,
+    const SkSurfaceProps* props) {
+  sk_sp<SkSurface> surface = SkSurface::MakeRasterDirectReleaseProc(
+      info, pixels, rowBytes, releaseProc, context, props);
+  if (surface.get())
+    return sk_make_sp<CdlSurface>(surface);
+  return nullptr;
+}
+
+/**
+*  Return a new surface, with the memory for the pixels automatically allocated
+* and
+*  zero-initialized, but respecting the specified rowBytes. If rowBytes==0, then
+* a default
+*  value will be chosen. If a non-zero rowBytes is specified, then any images
+* snapped off of
+*  this surface (via makeImageSnapshot()) are guaranteed to have the same
+* rowBytes.
+*
+*  If the requested surface cannot be created, or the request is not a
+*  supported configuration, NULL will be returned.
+*/
+sk_sp<CdlSurface> CdlSurface::MakeRaster(const SkImageInfo& info,
+                                         size_t rowBytes,
+                                         const SkSurfaceProps* props) {
+  sk_sp<SkSurface> surface = SkSurface::MakeRaster(info, rowBytes, props);
+  if (surface.get())
+    return sk_make_sp<CdlSurface>(surface);
+  return nullptr;
+}
+
+#if 0
+/**
+*  Used to wrap a pre-existing backend 3D API texture as a SkSurface. The kRenderTarget flag
+*  must be set on GrBackendTextureDesc for this to succeed. Skia will not assume ownership
+*  of the texture and the client must ensure the texture is valid for the lifetime of the
+*  SkSurface.
+*/
+static sk_sp<CdlSurface> CdlSurface::MakeFromBackendTexture(GrContext* context, const GrBackendTextureDesc& desc,
+                                           sk_sp<SkColorSpace> color, const SkSurfaceProps* props) {
+  return sk_make_sp<CdlSurface>(SkSurface::MakeFromBackendTexture(context, desc, color, props));
+}
+
+/**
+*  Used to wrap a pre-existing 3D API rendering target as a SkSurface. Skia will not assume
+*  ownership of the render target and the client must ensure the render target is valid for the
+*  lifetime of the SkSurface.
+*/
+static sk_sp<CdlSurface> CdlSurface::MakeFromBackendRenderTarget(GrContext*,
+                                                const GrBackendRenderTargetDesc&,
+                                                sk_sp<SkColorSpace>,
+                                                const SkSurfaceProps*) {
+
+}
+
+/**
+*  Used to wrap a pre-existing 3D API texture as a SkSurface. Skia will treat the texture as
+*  a rendering target only, but unlike NewFromBackendRenderTarget, Skia will manage and own
+*  the associated render target objects (but not the provided texture). The kRenderTarget flag
+*  must be set on GrBackendTextureDesc for this to succeed. Skia will not assume ownership
+*  of the texture and the client must ensure the texture is valid for the lifetime of the
+*  SkSurface.
+*/
+static sk_sp<CdlSurface> CdlSurface::MakeFromBackendTextureAsRenderTarget(
+GrContext*, const GrBackendTextureDesc&, sk_sp<SkColorSpace>, const SkSurfaceProps*) {
+
+}
+#endif
+
+/**
+*  Return a new surface whose contents will be drawn to an offscreen
+*  render target, allocated by the surface.
+*/
+sk_sp<CdlSurface> CdlSurface::MakeRenderTarget(GrContext* gc,
+                                               SkBudgeted budgeted,
+                                               const SkImageInfo& info,
+                                               int sampleCount,
+                                               GrSurfaceOrigin origin,
+                                               const SkSurfaceProps* props) {
+  sk_sp<SkSurface> surface = SkSurface::MakeRenderTarget(
+      gc, budgeted, info, sampleCount, origin, props);
+  if (surface.get())
+    return sk_make_sp<CdlSurface>(surface);
+  return nullptr;
+}
+
+CdlCanvas* CdlSurface::getCanvas() {
+  if (canvas_.get())
+    return canvas_.get();
+  canvas_ = base::MakeUnique<CdlPassThroughCanvas>(surface_->getCanvas());
+  return canvas_.get();
+}
+
+void CdlSurface::draw(CdlCanvas* canvas,
+                      SkScalar x,
+                      SkScalar y,
+                      const CdlPaint* paint) {
+  auto image = this->makeImageSnapshot(SkBudgeted::kYes);
+  if (image) {
+    canvas->drawImage(image, x, y, paint);
+  }
+}
+
+#endif  // CDL_ENABLED