| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef ANDROID_HWUI_OPENGL_RENDERER_H |
| #define ANDROID_HWUI_OPENGL_RENDERER_H |
| |
| #include <GLES2/gl2.h> |
| #include <GLES2/gl2ext.h> |
| |
| #include <SkBitmap.h> |
| #include <SkMatrix.h> |
| #include <SkPaint.h> |
| #include <SkRegion.h> |
| #include <SkShader.h> |
| #include <SkXfermode.h> |
| |
| #include <utils/Functor.h> |
| #include <utils/RefBase.h> |
| #include <utils/Vector.h> |
| |
| #include "Debug.h" |
| #include "Extensions.h" |
| #include "Matrix.h" |
| #include "Program.h" |
| #include "Rect.h" |
| #include "Snapshot.h" |
| #include "Vertex.h" |
| #include "SkiaShader.h" |
| #include "SkiaColorFilter.h" |
| #include "Caches.h" |
| |
| namespace android { |
| namespace uirenderer { |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // Renderer |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class DisplayList; |
| |
| /** |
| * OpenGL renderer used to draw accelerated 2D graphics. The API is a |
| * simplified version of Skia's Canvas API. |
| */ |
| class OpenGLRenderer { |
| public: |
| OpenGLRenderer(); |
| virtual ~OpenGLRenderer(); |
| |
| virtual void setViewport(int width, int height); |
| |
| void prepare(bool opaque); |
| virtual void prepareDirty(float left, float top, float right, float bottom, bool opaque); |
| virtual void finish(); |
| |
| // These two calls must not be recorded in display lists |
| virtual void interrupt(); |
| virtual void resume(); |
| |
| virtual bool callDrawGLFunction(Functor *functor, Rect& dirty); |
| |
| int getSaveCount() const; |
| virtual int save(int flags); |
| virtual void restore(); |
| virtual void restoreToCount(int saveCount); |
| |
| virtual int saveLayer(float left, float top, float right, float bottom, |
| SkPaint* p, int flags); |
| virtual int saveLayerAlpha(float left, float top, float right, float bottom, |
| int alpha, int flags); |
| |
| virtual void translate(float dx, float dy); |
| virtual void rotate(float degrees); |
| virtual void scale(float sx, float sy); |
| virtual void skew(float sx, float sy); |
| |
| void getMatrix(SkMatrix* matrix); |
| virtual void setMatrix(SkMatrix* matrix); |
| virtual void concatMatrix(SkMatrix* matrix); |
| |
| const Rect& getClipBounds(); |
| bool quickReject(float left, float top, float right, float bottom); |
| virtual bool clipRect(float left, float top, float right, float bottom, SkRegion::Op op); |
| |
| virtual bool drawDisplayList(DisplayList* displayList, uint32_t width, uint32_t height, |
| Rect& dirty, uint32_t level = 0); |
| virtual void outputDisplayList(DisplayList* displayList, uint32_t level = 0); |
| virtual void drawLayer(Layer* layer, float x, float y, SkPaint* paint); |
| virtual void drawBitmap(SkBitmap* bitmap, float left, float top, SkPaint* paint); |
| virtual void drawBitmap(SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint); |
| virtual void drawBitmap(SkBitmap* bitmap, float srcLeft, float srcTop, |
| float srcRight, float srcBottom, float dstLeft, float dstTop, |
| float dstRight, float dstBottom, SkPaint* paint); |
| virtual void drawBitmapMesh(SkBitmap* bitmap, int meshWidth, int meshHeight, |
| float* vertices, int* colors, SkPaint* paint); |
| virtual void drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, |
| const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, |
| float left, float top, float right, float bottom, SkPaint* paint); |
| virtual void drawColor(int color, SkXfermode::Mode mode); |
| virtual void drawRect(float left, float top, float right, float bottom, SkPaint* paint); |
| virtual void drawRoundRect(float left, float top, float right, float bottom, |
| float rx, float ry, SkPaint* paint); |
| virtual void drawCircle(float x, float y, float radius, SkPaint* paint); |
| virtual void drawOval(float left, float top, float right, float bottom, SkPaint* paint); |
| virtual void drawArc(float left, float top, float right, float bottom, |
| float startAngle, float sweepAngle, bool useCenter, SkPaint* paint); |
| virtual void drawPath(SkPath* path, SkPaint* paint); |
| virtual void drawLines(float* points, int count, SkPaint* paint); |
| virtual void drawPoints(float* points, int count, SkPaint* paint); |
| virtual void drawText(const char* text, int bytesCount, int count, float x, float y, |
| SkPaint* paint); |
| |
| virtual void resetShader(); |
| virtual void setupShader(SkiaShader* shader); |
| |
| virtual void resetColorFilter(); |
| virtual void setupColorFilter(SkiaColorFilter* filter); |
| |
| virtual void resetShadow(); |
| virtual void setupShadow(float radius, float dx, float dy, int color); |
| |
| protected: |
| /** |
| * Compose the layer defined in the current snapshot with the layer |
| * defined by the previous snapshot. |
| * |
| * The current snapshot *must* be a layer (flag kFlagIsLayer set.) |
| * |
| * @param curent The current snapshot containing the layer to compose |
| * @param previous The previous snapshot to compose the current layer with |
| */ |
| virtual void composeLayer(sp<Snapshot> current, sp<Snapshot> previous); |
| |
| /** |
| * Marks the specified region as dirty at the specified bounds. |
| */ |
| void dirtyLayerUnchecked(Rect& bounds, Region* region); |
| |
| /** |
| * Returns the current snapshot. |
| */ |
| sp<Snapshot> getSnapshot() { |
| return mSnapshot; |
| } |
| |
| /** |
| * Returns the region of the current layer. |
| */ |
| virtual Region* getRegion() { |
| return mSnapshot->region; |
| } |
| |
| /** |
| * Indicates whether rendering is currently targeted at a layer. |
| */ |
| virtual bool hasLayer() { |
| return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; |
| } |
| |
| /** |
| * Returns the name of the FBO this renderer is rendering into. |
| */ |
| virtual GLint getTargetFbo() { |
| return 0; |
| } |
| |
| /** |
| * Renders the specified layer as a textured quad. |
| * |
| * @param layer The layer to render |
| * @param rect The bounds of the layer |
| */ |
| void drawTextureLayer(Layer* layer, const Rect& rect); |
| |
| private: |
| /** |
| * Saves the current state of the renderer as a new snapshot. |
| * The new snapshot is saved in mSnapshot and the previous snapshot |
| * is linked from mSnapshot->previous. |
| * |
| * @param flags The save flags; see SkCanvas for more information |
| * |
| * @return The new save count. This value can be passed to #restoreToCount() |
| */ |
| int saveSnapshot(int flags); |
| |
| /** |
| * Restores the current snapshot; mSnapshot becomes mSnapshot->previous. |
| * |
| * @return True if the clip was modified. |
| */ |
| bool restoreSnapshot(); |
| |
| /** |
| * Sets the clipping rectangle using glScissor. The clip is defined by |
| * the current snapshot's clipRect member. |
| */ |
| void setScissorFromClip(); |
| |
| /** |
| * Creates a new layer stored in the specified snapshot. |
| * |
| * @param snapshot The snapshot associated with the new layer |
| * @param left The left coordinate of the layer |
| * @param top The top coordinate of the layer |
| * @param right The right coordinate of the layer |
| * @param bottom The bottom coordinate of the layer |
| * @param alpha The translucency of the layer |
| * @param mode The blending mode of the layer |
| * @param flags The layer save flags |
| * @param previousFbo The name of the current framebuffer |
| * |
| * @return True if the layer was successfully created, false otherwise |
| */ |
| bool createLayer(sp<Snapshot> snapshot, float left, float top, float right, float bottom, |
| int alpha, SkXfermode::Mode mode, int flags, GLuint previousFbo); |
| |
| /** |
| * Creates a new layer stored in the specified snapshot as an FBO. |
| * |
| * @param layer The layer to store as an FBO |
| * @param snapshot The snapshot associated with the new layer |
| * @param bounds The bounds of the layer |
| * @param previousFbo The name of the current framebuffer |
| */ |
| bool createFboLayer(Layer* layer, Rect& bounds, sp<Snapshot> snapshot, |
| GLuint previousFbo); |
| |
| /** |
| * Compose the specified layer as a region. |
| * |
| * @param layer The layer to compose |
| * @param rect The layer's bounds |
| */ |
| void composeLayerRegion(Layer* layer, const Rect& rect); |
| |
| /** |
| * Compose the specified layer as a simple rectangle. |
| * |
| * @param layer The layer to compose |
| * @param rect The layer's bounds |
| * @param swap If true, the source and destination are swapped |
| */ |
| void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); |
| |
| /** |
| * Clears all the regions corresponding to the current list of layers. |
| * This method MUST be invoked before any drawing operation. |
| */ |
| void clearLayerRegions(); |
| |
| /** |
| * Mark the layer as dirty at the specified coordinates. The coordinates |
| * are transformed with the supplied matrix. |
| */ |
| void dirtyLayer(const float left, const float top, |
| const float right, const float bottom, const mat4 transform); |
| |
| /** |
| * Mark the layer as dirty at the specified coordinates. |
| */ |
| void dirtyLayer(const float left, const float top, |
| const float right, const float bottom); |
| |
| /** |
| * Draws a colored rectangle with the specified color. The specified coordinates |
| * are transformed by the current snapshot's transform matrix. |
| * |
| * @param left The left coordinate of the rectangle |
| * @param top The top coordinate of the rectangle |
| * @param right The right coordinate of the rectangle |
| * @param bottom The bottom coordinate of the rectangle |
| * @param color The rectangle's ARGB color, defined as a packed 32 bits word |
| * @param mode The Skia xfermode to use |
| * @param ignoreTransform True if the current transform should be ignored |
| * @param ignoreBlending True if the blending is set by the caller |
| */ |
| void drawColorRect(float left, float top, float right, float bottom, |
| int color, SkXfermode::Mode mode, bool ignoreTransform = false); |
| |
| /** |
| * Draws the shape represented by the specified path texture. |
| * This method invokes drawPathTexture() but takes into account |
| * the extra left/top offset and the texture offset to correctly |
| * position the final shape. |
| * |
| * @param left The left coordinate of the shape to render |
| * @param top The top coordinate of the shape to render |
| * @param texture The texture reprsenting the shape |
| * @param paint The paint to draw the shape with |
| */ |
| void drawShape(float left, float top, const PathTexture* texture, SkPaint* paint); |
| |
| /** |
| * Renders the rect defined by the specified bounds as a shape. |
| * This will render the rect using a path texture, which is used to render |
| * rects with stroke effects. |
| * |
| * @param left The left coordinate of the rect to draw |
| * @param top The top coordinate of the rect to draw |
| * @param right The right coordinate of the rect to draw |
| * @param bottom The bottom coordinate of the rect to draw |
| * @param p The paint to draw the rect with |
| */ |
| void drawRectAsShape(float left, float top, float right, float bottom, SkPaint* p); |
| |
| /** |
| * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey |
| * different compositing rules. |
| * |
| * @param texture The texture to draw with |
| * @param left The x coordinate of the bitmap |
| * @param top The y coordinate of the bitmap |
| * @param paint The paint to render with |
| */ |
| void drawAlphaBitmap(Texture* texture, float left, float top, SkPaint* paint); |
| |
| /** |
| * Renders the rect defined by the specified bounds as an anti-aliased rect. |
| * |
| * @param left The left coordinate of the rect to draw |
| * @param top The top coordinate of the rect to draw |
| * @param right The right coordinate of the rect to draw |
| * @param bottom The bottom coordinate of the rect to draw |
| * @param color The color of the rect |
| * @param mode The blending mode to draw the rect |
| */ |
| void drawAARect(float left, float top, float right, float bottom, |
| int color, SkXfermode::Mode mode); |
| |
| /** |
| * Draws a textured rectangle with the specified texture. The specified coordinates |
| * are transformed by the current snapshot's transform matrix. |
| * |
| * @param left The left coordinate of the rectangle |
| * @param top The top coordinate of the rectangle |
| * @param right The right coordinate of the rectangle |
| * @param bottom The bottom coordinate of the rectangle |
| * @param texture The texture name to map onto the rectangle |
| * @param alpha An additional translucency parameter, between 0.0f and 1.0f |
| * @param mode The blending mode |
| * @param blend True if the texture contains an alpha channel |
| */ |
| void drawTextureRect(float left, float top, float right, float bottom, GLuint texture, |
| float alpha, SkXfermode::Mode mode, bool blend); |
| |
| /** |
| * Draws a textured rectangle with the specified texture. The specified coordinates |
| * are transformed by the current snapshot's transform matrix. |
| * |
| * @param left The left coordinate of the rectangle |
| * @param top The top coordinate of the rectangle |
| * @param right The right coordinate of the rectangle |
| * @param bottom The bottom coordinate of the rectangle |
| * @param texture The texture to use |
| * @param paint The paint containing the alpha, blending mode, etc. |
| */ |
| void drawTextureRect(float left, float top, float right, float bottom, |
| Texture* texture, SkPaint* paint); |
| |
| /** |
| * Draws a textured mesh with the specified texture. If the indices are omitted, |
| * the mesh is drawn as a simple quad. The mesh pointers become offsets when a |
| * VBO is bound. |
| * |
| * @param left The left coordinate of the rectangle |
| * @param top The top coordinate of the rectangle |
| * @param right The right coordinate of the rectangle |
| * @param bottom The bottom coordinate of the rectangle |
| * @param texture The texture name to map onto the rectangle |
| * @param alpha An additional translucency parameter, between 0.0f and 1.0f |
| * @param mode The blending mode |
| * @param blend True if the texture contains an alpha channel |
| * @param vertices The vertices that define the mesh |
| * @param texCoords The texture coordinates of each vertex |
| * @param elementsCount The number of elements in the mesh, required by indices |
| * @param swapSrcDst Whether or not the src and dst blending operations should be swapped |
| * @param ignoreTransform True if the current transform should be ignored |
| * @param vbo The VBO used to draw the mesh |
| * @param ignoreScale True if the model view matrix should not be scaled |
| * @param dirty True if calling this method should dirty the current layer |
| */ |
| void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, |
| float alpha, SkXfermode::Mode mode, bool blend, |
| GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, |
| bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, |
| bool ignoreScale = false, bool dirty = true); |
| |
| /** |
| * Draws text underline and strike-through if needed. |
| * |
| * @param text The text to decor |
| * @param bytesCount The number of bytes in the text |
| * @param length The length in pixels of the text, can be <= 0.0f to force a measurement |
| * @param x The x coordinate where the text will be drawn |
| * @param y The y coordinate where the text will be drawn |
| * @param paint The paint to draw the text with |
| */ |
| void drawTextDecorations(const char* text, int bytesCount, float length, |
| float x, float y, SkPaint* paint); |
| |
| /** |
| * Draws a path texture. Path textures are alpha8 bitmaps that need special |
| * compositing to apply colors/filters/etc. |
| * |
| * @param texture The texture to render |
| * @param x The x coordinate where the texture will be drawn |
| * @param y The y coordinate where the texture will be drawn |
| * @param paint The paint to draw the texture with |
| */ |
| void drawPathTexture(const PathTexture* texture, float x, float y, SkPaint* paint); |
| |
| /** |
| * Resets the texture coordinates stored in mMeshVertices. Setting the values |
| * back to default is achieved by calling: |
| * |
| * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); |
| * |
| * @param u1 The left coordinate of the texture |
| * @param v1 The bottom coordinate of the texture |
| * @param u2 The right coordinate of the texture |
| * @param v2 The top coordinate of the texture |
| */ |
| void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); |
| |
| /** |
| * Gets the alpha and xfermode out of a paint object. If the paint is null |
| * alpha will be 255 and the xfermode will be SRC_OVER. |
| * |
| * @param paint The paint to extract values from |
| * @param alpha Where to store the resulting alpha |
| * @param mode Where to store the resulting xfermode |
| */ |
| inline void getAlphaAndMode(SkPaint* paint, int* alpha, SkXfermode::Mode* mode); |
| |
| /** |
| * Binds the specified texture. The texture unit must have been selected |
| * prior to calling this method. |
| */ |
| inline void bindTexture(GLuint texture) { |
| glBindTexture(GL_TEXTURE_2D, texture); |
| } |
| |
| /** |
| * Binds the specified EGLImage texture. The texture unit must have been selected |
| * prior to calling this method. |
| */ |
| inline void bindExternalTexture(GLuint texture) { |
| glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture); |
| } |
| |
| /** |
| * Enable or disable blending as necessary. This function sets the appropriate |
| * blend function based on the specified xfermode. |
| */ |
| inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, |
| bool swapSrcDst = false); |
| |
| /** |
| * Safely retrieves the mode from the specified xfermode. If the specified |
| * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. |
| */ |
| inline SkXfermode::Mode getXfermode(SkXfermode* mode); |
| |
| /** |
| * Use the specified program with the current GL context. If the program is already |
| * in use, it will not be bound again. If it is not in use, the current program is |
| * marked unused and the specified program becomes used and becomes the new |
| * current program. |
| * |
| * @param program The program to use |
| * |
| * @return true If the specified program was already in use, false otherwise. |
| */ |
| inline bool useProgram(Program* program); |
| |
| /** |
| * Invoked before any drawing operation. This sets required state. |
| */ |
| void setupDraw(bool clear = true); |
| /** |
| * Various methods to setup OpenGL rendering. |
| */ |
| void setupDrawWithTexture(bool isAlpha8 = false); |
| void setupDrawWithExternalTexture(); |
| void setupDrawAALine(); |
| void setupDrawPoint(float pointSize); |
| void setupDrawColor(int color); |
| void setupDrawColor(int color, int alpha); |
| void setupDrawColor(float r, float g, float b, float a); |
| void setupDrawAlpha8Color(int color, int alpha); |
| void setupDrawAlpha8Color(float r, float g, float b, float a); |
| void setupDrawShader(); |
| void setupDrawColorFilter(); |
| void setupDrawBlending(SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, |
| bool swapSrcDst = false); |
| void setupDrawBlending(bool blend = true, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, |
| bool swapSrcDst = false); |
| void setupDrawProgram(); |
| void setupDrawDirtyRegionsDisabled(); |
| void setupDrawModelViewIdentity(bool offset = false); |
| void setupDrawModelView(float left, float top, float right, float bottom, |
| bool ignoreTransform = false, bool ignoreModelView = false); |
| void setupDrawModelViewTranslate(float left, float top, float right, float bottom, |
| bool ignoreTransform = false); |
| void setupDrawPointUniforms(); |
| void setupDrawColorUniforms(); |
| void setupDrawPureColorUniforms(); |
| void setupDrawShaderIdentityUniforms(); |
| void setupDrawShaderUniforms(bool ignoreTransform = false); |
| void setupDrawColorFilterUniforms(); |
| void setupDrawSimpleMesh(); |
| void setupDrawTexture(GLuint texture); |
| void setupDrawExternalTexture(GLuint texture); |
| void setupDrawTextureTransform(); |
| void setupDrawTextureTransformUniforms(mat4& transform); |
| void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords = NULL, GLuint vbo = 0); |
| void setupDrawVertices(GLvoid* vertices); |
| void setupDrawAALine(GLvoid* vertices, GLvoid* distanceCoords, GLvoid* lengthCoords, |
| float strokeWidth); |
| void finishDrawTexture(); |
| void accountForClear(SkXfermode::Mode mode); |
| |
| void drawRegionRects(const Region& region); |
| |
| /** |
| * Should be invoked every time the glScissor is modified. |
| */ |
| inline void dirtyClip() { |
| mDirtyClip = true; |
| } |
| |
| // Dimensions of the drawing surface |
| int mWidth, mHeight; |
| |
| // Matrix used for ortho projection in shaders |
| mat4 mOrthoMatrix; |
| |
| // Model-view matrix used to position/size objects |
| mat4 mModelView; |
| |
| // Number of saved states |
| int mSaveCount; |
| // Base state |
| sp<Snapshot> mFirstSnapshot; |
| // Current state |
| sp<Snapshot> mSnapshot; |
| |
| // Shaders |
| SkiaShader* mShader; |
| |
| // Color filters |
| SkiaColorFilter* mColorFilter; |
| |
| // Used to draw textured quads |
| TextureVertex mMeshVertices[4]; |
| |
| // Drop shadow |
| bool mHasShadow; |
| float mShadowRadius; |
| float mShadowDx; |
| float mShadowDy; |
| int mShadowColor; |
| |
| // Various caches |
| Caches& mCaches; |
| |
| // List of rectagnles to clear after saveLayer() is invoked |
| Vector<Rect*> mLayers; |
| |
| // Indentity matrix |
| const mat4 mIdentity; |
| |
| // Indicates whether the clip must be restored |
| bool mDirtyClip; |
| |
| // The following fields are used to setup drawing |
| // Used to describe the shaders to generate |
| ProgramDescription mDescription; |
| // Color description |
| bool mColorSet; |
| float mColorA, mColorR, mColorG, mColorB; |
| // Indicates that the shader should get a color |
| bool mSetShaderColor; |
| // Current texture unit |
| GLuint mTextureUnit; |
| // Track dirty regions, true by default |
| bool mTrackDirtyRegions; |
| // Texture coordinates slot |
| int mTexCoordsSlot; |
| |
| friend class DisplayListRenderer; |
| |
| }; // class OpenGLRenderer |
| |
| }; // namespace uirenderer |
| }; // namespace android |
| |
| #endif // ANDROID_HWUI_OPENGL_RENDERER_H |