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 <include/core/SkCanvas.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 SkTextBlob blob at (x, y), using clip, SkMatrix, and SkPaint paint. 44 */ 45 void DrawTextBlob(const std::shared_ptr<TexgineTextBlob> &blob, float x, float y, const TexginePaint &paint); 46 47 /* 48 * @brief Fills clip with color color using SkBlendMode::kSrc. 49 * This has the effect of replacing all pixels contained by clip with color. 50 * @param color unpremultiplied ARGB 51 */ 52 void Clear(uint32_t color) const; 53 54 /* 55 * @brief Saves SkMatrix and clip, and allocates a SkBitmap for subsequent drawing. 56 */ 57 int Save() const; 58 59 /* 60 * @brief Translates SkMatrix by dx along the x-axis and dy along the y-axis. 61 */ 62 void Translate(float dx, float dy) const; 63 64 /* 65 * @brief Returns the pointer of SkCanvas what user sets to TexgineCanvas 66 */ 67 SkCanvas *GetCanvas() const; 68 69 /* 70 * @brief Removes changes to SkMatrix and clip since SkCanvas state was 71 last saved. The state is removed from the stack. 72 */ 73 void Restore() const; 74 75 /* 76 * @brief Sets SkCanvas to TexgineCanvas what user want 77 */ 78 void SetCanvas(SkCanvas *canvas); 79 80 private: 81 SkCanvas *canvas_ = nullptr; 82 }; 83 } // namespace TextEngine 84 } // namespace Rosen 85 } // namespace OHOS 86 87 #endif // ROSEN_MODULES_TEXGINE_SRC_TEXGINE_DRAWING_TEXGINE_CANVAS_H 88