1 /*
2  * Copyright (c) 2023 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 ROSEN_MODULES_TEXGINE_SRC_TEXGINE_DRAWING_TEXGINE_CANVAS_H
17 #define ROSEN_MODULES_TEXGINE_SRC_TEXGINE_DRAWING_TEXGINE_CANVAS_H
18 
19 #include <memory>
20 
21 #include "drawing.h"
22 
23 #include "texgine_rect.h"
24 #include "texgine_paint.h"
25 #include "texgine_text_blob.h"
26 
27 namespace OHOS {
28 namespace Rosen {
29 namespace TextEngine {
30 class TexgineCanvas {
31 public:
32     /*
33      * @brief Draws line segment from (x0, y0) to (x1, y1) using clip, SkMatrix, and SkPaint paint.
34      */
35     void DrawLine(double x0, double y0, double x1, double y1, const TexginePaint &paint);
36 
37     /*
38      * @brief Draws SkRect rect using clip, SkMatrix, and SkPaint paint.
39      */
40     void DrawRect(const TexgineRect &rect, const TexginePaint &paint) const;
41 
42     /*
43      * @brief Draws SkRRect rect using SkPaint paint.
44      */
45     void DrawRRect(const TexgineRect &rect, const TexginePaint &paint) const;
46 
47     /*
48      * @brief Draws SkTextBlob blob at (x, y), using clip, SkMatrix, and SkPaint paint.
49      */
50     void DrawTextBlob(const std::shared_ptr<TexgineTextBlob> &blob, float x, float y, const TexginePaint &paint);
51 
52     /*
53      * @brief Draws symbol at point, using clip, SkMatrix, and paint.
54      */
55     void DrawSymbol(const RSHMSymbolData &symbol, RSPoint locate, const TexginePaint &paint);
56 
57     /*
58      * @brief Draws Path , using SkPath path and SkPaint paint.
59      */
60     void DrawPath(const RSPath &path, const TexginePaint &paint);
61 
62     /*
63      * @brief Fills clip with color color using SkBlendMode::kSrc.
64      *        This has the effect of replacing all pixels contained by clip with color.
65      * @param color unpremultiplied ARGB
66      */
67     void Clear(uint32_t color) const;
68 
69     /*
70      * @brief Saves SkMatrix and clip, and allocates a SkBitmap for subsequent drawing.
71      */
72     int Save() const;
73 
74     /*
75      * @brief Translates SkMatrix by dx along the x-axis and dy along the y-axis.
76      */
77     void Translate(float dx, float dy) const;
78 
79     /*
80      * @brief Returns the pointer of SkCanvas what user sets to TexgineCanvas
81      */
82     RSCanvas *GetCanvas() const;
83 
84     /*
85      * @brief Removes changes to SkMatrix and clip since SkCanvas state was
86               last saved. The state is removed from the stack.
87     */
88     void Restore() const;
89 
90     /*
91      * @brief Sets SkCanvas to TexgineCanvas what user want
92      */
93     void SetCanvas(RSCanvas *canvas);
94 
95 private:
96     RSCanvas *canvas_ = nullptr;
97 };
98 } // namespace TextEngine
99 } // namespace Rosen
100 } // namespace OHOS
101 
102 #endif // ROSEN_MODULES_TEXGINE_SRC_TEXGINE_DRAWING_TEXGINE_CANVAS_H
103