| /* |
| * 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_UI_OPENGL_RENDERER_H |
| #define ANDROID_UI_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/RefBase.h> |
| #include <utils/ResourceTypes.h> |
| |
| #include "Extensions.h" |
| #include "Matrix.h" |
| #include "Program.h" |
| #include "Rect.h" |
| #include "Snapshot.h" |
| #include "TextureCache.h" |
| #include "LayerCache.h" |
| #include "GradientCache.h" |
| #include "PatchCache.h" |
| #include "Vertex.h" |
| #include "FontRenderer.h" |
| #include "ProgramCache.h" |
| #include "SkiaShader.h" |
| #include "SkiaColorFilter.h" |
| #include "PathCache.h" |
| #include "TextDropShadowCache.h" |
| |
| namespace android { |
| namespace uirenderer { |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // Renderer |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| /** |
| * OpenGL renderer used to draw accelerated 2D graphics. The API is a |
| * simplified version of Skia's Canvas API. |
| */ |
| class OpenGLRenderer { |
| public: |
| OpenGLRenderer(); |
| ~OpenGLRenderer(); |
| |
| void setViewport(int width, int height); |
| void prepare(); |
| |
| int getSaveCount() const; |
| int save(int flags); |
| void restore(); |
| void restoreToCount(int saveCount); |
| |
| int saveLayer(float left, float top, float right, float bottom, const SkPaint* p, int flags); |
| int saveLayerAlpha(float left, float top, float right, float bottom, int alpha, int flags); |
| |
| void translate(float dx, float dy); |
| void rotate(float degrees); |
| void scale(float sx, float sy); |
| |
| void setMatrix(SkMatrix* matrix); |
| void getMatrix(SkMatrix* matrix); |
| void concatMatrix(SkMatrix* matrix); |
| |
| const Rect& getClipBounds(); |
| bool quickReject(float left, float top, float right, float bottom); |
| bool clipRect(float left, float top, float right, float bottom, SkRegion::Op op); |
| |
| void drawBitmap(SkBitmap* bitmap, float left, float top, const SkPaint* paint); |
| void drawBitmap(SkBitmap* bitmap, const SkMatrix* matrix, const SkPaint* paint); |
| void drawBitmap(SkBitmap* bitmap, float srcLeft, float srcTop, float srcRight, float srcBottom, |
| float dstLeft, float dstTop, float dstRight, float dstBottom, const SkPaint* paint); |
| void drawPatch(SkBitmap* bitmap, Res_png_9patch* patch, float left, float top, |
| float right, float bottom, const SkPaint* paint); |
| void drawColor(int color, SkXfermode::Mode mode); |
| void drawRect(float left, float top, float right, float bottom, const SkPaint* paint); |
| void drawPath(SkPath* path, SkPaint* paint); |
| |
| void resetShader(); |
| void setupShader(SkiaShader* shader); |
| |
| void resetColorFilter(); |
| void setupColorFilter(SkiaColorFilter* filter); |
| |
| void resetShadow(); |
| void setupShadow(float radius, float dx, float dy, int color); |
| |
| void drawText(const char* text, int bytesCount, int count, float x, float y, SkPaint* paint); |
| |
| 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. |
| * |
| * @return The new save count. This value can be passed to #restoreToCount() |
| */ |
| int saveSnapshot(); |
| |
| /** |
| * 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(); |
| |
| /** |
| * 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 |
| */ |
| void composeLayer(sp<Snapshot> current, sp<Snapshot> previous); |
| |
| /** |
| * 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 |
| * |
| * @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); |
| |
| /** |
| * 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 |
| */ |
| void drawColorRect(float left, float top, float right, float bottom, |
| int color, SkXfermode::Mode mode, bool ignoreTransform = false); |
| |
| /** |
| * 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, |
| const Texture* texture, const SkPaint* paint); |
| |
| /** |
| * Draws a textured mesh with the specified texture. If the indices are omitted, the |
| * mesh is drawn as a simple quad. |
| * |
| * @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 indices The indices of the vertices, can be NULL |
| * @param elementsCount The number of elements in the mesh, required by indices |
| */ |
| void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, |
| float alpha, SkXfermode::Mode mode, bool blend, |
| GLvoid* vertices, GLvoid* texCoords, GLvoid* indices, GLsizei elementsCount = 0); |
| |
| /** |
| * Prepares the renderer to draw the specified shadow. |
| * |
| * @param texture The shadow texture |
| * @param x The x coordinate of the shadow |
| * @param y The y coordinate of the shadow |
| * @param mode The blending mode |
| * @param alpha The alpha value |
| */ |
| void setupShadow(const ShadowTexture* texture, float x, float y, SkXfermode::Mode mode, |
| float alpha); |
| |
| /** |
| * Prepares the renderer to draw the specified Alpha8 texture as a rectangle. |
| * |
| * @param texture The texture to render with |
| * @param textureUnit The texture unit to use, may be modified |
| * @param x The x coordinate of the rectangle to draw |
| * @param y The y coordinate of the rectangle to draw |
| * @param r The red component of the color |
| * @param g The green component of the color |
| * @param b The blue component of the color |
| * @param a The alpha component of the color |
| * @param mode The blending mode |
| * @param transforms True if the matrix passed to the shader should be multiplied |
| * by the model-view matrix |
| * @param applyFilters Whether or not to take color filters and |
| * shaders into account |
| */ |
| void setupTextureAlpha8(const Texture* texture, GLuint& textureUnit, float x, float y, |
| float r, float g, float b, float a, SkXfermode::Mode mode, bool transforms, |
| bool applyFilters); |
| |
| /** |
| * Prepares the renderer to draw the specified Alpha8 texture as a rectangle. |
| * |
| * @param texture The texture to render with |
| * @param width The width of the texture |
| * @param height The height of the texture |
| * @param textureUnit The texture unit to use, may be modified |
| * @param x The x coordinate of the rectangle to draw |
| * @param y The y coordinate of the rectangle to draw |
| * @param r The red component of the color |
| * @param g The green component of the color |
| * @param b The blue component of the color |
| * @param a The alpha component of the color |
| * @param mode The blending mode |
| * @param transforms True if the matrix passed to the shader should be multiplied |
| * by the model-view matrix |
| * @param applyFilters Whether or not to take color filters and |
| * shaders into account |
| */ |
| void setupTextureAlpha8(GLuint texture, uint32_t width, uint32_t height, |
| GLuint& textureUnit, float x, float y, float r, float g, float b, float a, |
| SkXfermode::Mode mode, bool transforms, bool applyFilters); |
| |
| /** |
| * 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); |
| |
| /** |
| * 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(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode); |
| |
| /** |
| * Binds the specified texture with the specified wrap modes. |
| */ |
| inline void bindTexture(GLuint texture, GLenum wrapS, GLenum wrapT, GLuint textureUnit = 0); |
| |
| /** |
| * 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, bool isPremultiplied = true); |
| |
| /** |
| * 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); |
| |
| // 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 |
| Program* mCurrentProgram; |
| SkiaShader* mShader; |
| |
| // Color filters |
| SkiaColorFilter* mColorFilter; |
| |
| // Used to draw textured quads |
| TextureVertex mMeshVertices[4]; |
| |
| // Last known blend state |
| bool mBlend; |
| GLenum mLastSrcMode; |
| GLenum mLastDstMode; |
| |
| // GL extensions |
| Extensions mExtensions; |
| |
| // Font renderer |
| FontRenderer mFontRenderer; |
| |
| // Drop shadow |
| bool mHasShadow; |
| float mShadowRadius; |
| float mShadowDx; |
| float mShadowDy; |
| int mShadowColor; |
| |
| // Various caches |
| TextureCache mTextureCache; |
| LayerCache mLayerCache; |
| GradientCache mGradientCache; |
| ProgramCache mProgramCache; |
| PathCache mPathCache; |
| PatchCache mPatchCache; |
| TextDropShadowCache mDropShadowCache; |
| }; // class OpenGLRenderer |
| |
| }; // namespace uirenderer |
| }; // namespace android |
| |
| #endif // ANDROID_UI_OPENGL_RENDERER_H |