1 /*
2 * Copyright (C) 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "CanvasOpRasterizer.h"
18
19 #include <SkCanvas.h>
20 #include <log/log.h>
21
22 #include <vector>
23
24 #include "CanvasOpBuffer.h"
25 #include "CanvasOps.h"
26
27 namespace android::uirenderer {
28
rasterizeCanvasBuffer(const CanvasOpBuffer & source,SkCanvas * destination)29 void rasterizeCanvasBuffer(const CanvasOpBuffer& source, SkCanvas* destination) {
30 // Tracks the global transform from the current display list back toward the display space
31 // Push on beginning a RenderNode draw, pop on ending one
32 std::vector<SkMatrix> globalMatrixStack;
33 SkMatrix& currentGlobalTransform = globalMatrixStack.emplace_back(SkMatrix::I());
34
35 source.for_each([&]<CanvasOpType T>(const CanvasOpContainer<T> * op) {
36 if constexpr (CanvasOpTraits::can_draw<CanvasOp<T>>) {
37 // Generic OP
38 // First apply the current transformation
39 destination->setMatrix(SkMatrix::Concat(currentGlobalTransform, op->transform()));
40 // Now draw it
41 (*op)->draw(destination);
42 return;
43 }
44 LOG_ALWAYS_FATAL("TODO, unable to rasterize %d", static_cast<int>(T));
45 });
46 }
47
48 } // namespace android::uirenderer
49