| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef FLUTTER_LIB_WEB_UI_SKWASM_SURFACE_H_ |
| #define FLUTTER_LIB_WEB_UI_SKWASM_SURFACE_H_ |
| |
| #include <GLES2/gl2.h> |
| #include <GLES2/gl2ext.h> |
| #include <emscripten.h> |
| #include <emscripten/html5_webgl.h> |
| #include <emscripten/threading.h> |
| #include <webgl/webgl1.h> |
| #include <cassert> |
| #include "export.h" |
| #include "skwasm_support.h" |
| #include "third_party/skia/include/core/SkCanvas.h" |
| #include "third_party/skia/include/core/SkColorSpace.h" |
| #include "third_party/skia/include/core/SkPicture.h" |
| #include "third_party/skia/include/core/SkSurface.h" |
| #include "third_party/skia/include/encode/SkPngEncoder.h" |
| #include "third_party/skia/include/gpu/GrDirectContext.h" |
| #include "third_party/skia/include/gpu/ganesh/SkSurfaceGanesh.h" |
| #include "third_party/skia/include/gpu/gl/GrGLInterface.h" |
| #include "third_party/skia/include/gpu/gl/GrGLTypes.h" |
| #include "wrappers.h" |
| |
| namespace Skwasm { |
| // This must be kept in sync with the `ImageByteFormat` enum in dart:ui. |
| enum class ImageByteFormat { |
| rawRgba, |
| rawStraightRgba, |
| rawUnmodified, |
| png, |
| }; |
| |
| class TextureSourceWrapper { |
| public: |
| TextureSourceWrapper(unsigned long threadId, SkwasmObject textureSource) |
| : _rasterThreadId(threadId) { |
| skwasm_setAssociatedObjectOnThread(_rasterThreadId, this, textureSource); |
| } |
| |
| ~TextureSourceWrapper() { |
| skwasm_disposeAssociatedObjectOnThread(_rasterThreadId, this); |
| } |
| |
| SkwasmObject getTextureSource() { return skwasm_getAssociatedObject(this); } |
| |
| private: |
| unsigned long _rasterThreadId; |
| }; |
| |
| class Surface { |
| public: |
| using CallbackHandler = void(uint32_t, void*, SkwasmObject); |
| |
| // Main thread only |
| Surface(); |
| |
| unsigned long getThreadId() { return _thread; } |
| |
| // Main thread only |
| void dispose(); |
| uint32_t renderPicture(SkPicture* picture); |
| uint32_t rasterizeImage(SkImage* image, ImageByteFormat format); |
| void setCallbackHandler(CallbackHandler* callbackHandler); |
| void onRenderComplete(uint32_t callbackId, SkwasmObject imageBitmap); |
| |
| // Any thread |
| std::unique_ptr<TextureSourceWrapper> createTextureSourceWrapper( |
| SkwasmObject textureSource); |
| |
| // Worker thread |
| void renderPictureOnWorker(SkPicture* picture, uint32_t callbackId); |
| |
| private: |
| void _runWorker(); |
| void _init(); |
| void _dispose(); |
| void _resizeCanvasToFit(int width, int height); |
| void _recreateSurface(); |
| void _rasterizeImage(SkImage* image, |
| ImageByteFormat format, |
| uint32_t callbackId); |
| void _onRasterizeComplete(SkData* data, uint32_t callbackId); |
| |
| std::string _canvasID; |
| CallbackHandler* _callbackHandler = nullptr; |
| uint32_t _currentCallbackId = 0; |
| |
| int _canvasWidth = 0; |
| int _canvasHeight = 0; |
| |
| EMSCRIPTEN_WEBGL_CONTEXT_HANDLE _glContext = 0; |
| sk_sp<GrDirectContext> _grContext = nullptr; |
| sk_sp<SkSurface> _surface = nullptr; |
| GrGLFramebufferInfo _fbInfo; |
| GrGLint _sampleCount; |
| GrGLint _stencil; |
| |
| pthread_t _thread; |
| |
| static void fDispose(Surface* surface); |
| static void fOnRenderComplete(Surface* surface, |
| uint32_t callbackId, |
| SkwasmObject imageBitmap); |
| static void fRasterizeImage(Surface* surface, |
| SkImage* image, |
| ImageByteFormat format, |
| uint32_t callbackId); |
| static void fOnRasterizeComplete(Surface* surface, |
| SkData* imageData, |
| uint32_t callbackId); |
| }; |
| } // namespace Skwasm |
| |
| #endif // FLUTTER_LIB_WEB_UI_SKWASM_SURFACE_H_ |