1 /*
2  * Copyright (c) 2020-2021 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef GRAPHIC_LITE_DRAW_TRIANGLE_H
17 #define GRAPHIC_LITE_DRAW_TRIANGLE_H
18 
19 #include "gfx_utils/color.h"
20 #include "gfx_utils/geometry2d.h"
21 #include "gfx_utils/graphic_buffer.h"
22 
23 namespace OHOS {
24 class DrawTriangle : public HeapBase {
25 public:
26     static void Draw(BufferInfo& gfxDstBuffer, const Point* points, uint8_t count,
27                      const Rect& mask, const ColorType& color, OpacityType opa);
28 
29     struct Edge {
30         Point curPoint;
31         Point dPoint;
32         Point uPoint;
33         int16_t eps;
34     };
35 
36     static void SortVertexs(Point& p1, Point& p2, Point& p3);
37 
38     static void SortPoint(Point& p1, Point& p2);
39 
40     static void StepToNextPointOnEdge(Edge& edge);
41 
42     static Edge InitEdge(const Point& startP, const Point& endP);
43 private:
44     static constexpr uint8_t VERTEX_NUM = 3;
45 };
46 } // namespace OHOS
47 #endif // GRAPHIC_LITE_DRAW_TRIANGLE_H
48