2 * Copyright (C) 2010 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #ifndef ANDROID_HWUI_OPENGL_RENDERER_H
18 #define ANDROID_HWUI_OPENGL_RENDERER_H
20 #include "CanvasState.h"
22 #include "Extensions.h"
30 #include "utils/PaintUtils.h"
32 #include <GLES2/gl2.h>
33 #include <GLES2/gl2ext.h>
37 #include <SkColorFilter.h>
41 #include <SkXfermode.h>
43 #include <utils/Blur.h>
44 #include <utils/Functor.h>
45 #include <utils/RefBase.h>
46 #include <utils/SortedVector.h>
47 #include <utils/Vector.h>
49 #include <cutils/compiler.h>
51 #include <androidfw/ResourceTypes.h>
56 namespace uirenderer {
58 enum class DrawOpMode {
64 class DeferredDisplayState;
68 class TextSetupFunctor;
71 struct DrawModifiers {
73 : mOverrideLayerAlpha(0.0f) {}
76 mOverrideLayerAlpha = 0.0f;
79 float mOverrideLayerAlpha;
82 enum StateDeferFlags {
83 kStateDeferFlag_Draw = 0x1,
84 kStateDeferFlag_Clip = 0x2
91 kClipSide_Right = 0x4,
92 kClipSide_Bottom = 0x8,
94 kClipSide_ConservativeFull = 0x1F
97 enum VertexBufferDisplayFlags {
98 kVertexBuffer_Offset = 0x1,
99 kVertexBuffer_ShadowInterp = 0x2,
103 * Defines additional transformation that should be applied by the model view matrix, beyond that of
104 * the currentTransform()
108 * Used when the model view should simply translate geometry passed to the shader. The resulting
109 * matrix will be a simple translation.
111 kModelViewMode_Translate = 0,
114 * Used when the model view should translate and scale geometry. The resulting matrix will be a
115 * translation + scale. This is frequently used together with VBO 0, the (0,0,1,1) rect.
117 kModelViewMode_TranslateAndScale = 1,
120 ///////////////////////////////////////////////////////////////////////////////
122 ///////////////////////////////////////////////////////////////////////////////
124 * OpenGL Renderer implementation.
126 class OpenGLRenderer : public CanvasStateClient {
128 OpenGLRenderer(RenderState& renderState);
129 virtual ~OpenGLRenderer();
132 * Sets the dimension of the underlying drawing surface. This method must
133 * be called at least once every time the drawing surface changes size.
135 * @param width The width in pixels of the underlysing surface
136 * @param height The height in pixels of the underlysing surface
138 void setViewport(int width, int height) { mState.setViewport(width, height); }
140 void initProperties();
141 void initLight(const Vector3& lightCenter, float lightRadius,
142 uint8_t ambientShadowAlpha, uint8_t spotShadowAlpha);
145 * Prepares the renderer to draw a frame. This method must be invoked
146 * at the beginning of each frame. Only the specified rectangle of the
147 * frame is assumed to be dirty. A clip will automatically be set to
148 * the specified rectangle.
150 * @param opaque If true, the target surface is considered opaque
151 * and will not be cleared. If false, the target surface
154 virtual void prepareDirty(float left, float top, float right, float bottom,
158 * Prepares the renderer to draw a frame. This method must be invoked
159 * at the beginning of each frame. When this method is invoked, the
160 * entire drawing surface is assumed to be redrawn.
162 * @param opaque If true, the target surface is considered opaque
163 * and will not be cleared. If false, the target surface
166 void prepare(bool opaque) {
167 prepareDirty(0.0f, 0.0f, mState.getWidth(), mState.getHeight(), opaque);
171 * Indicates the end of a frame. This method must be invoked whenever
172 * the caller is done rendering a frame.
173 * Returns true if any drawing was done during the frame (the output
174 * has changed / is "dirty" and should be displayed to the user).
176 virtual bool finish();
178 void callDrawGLFunction(Functor* functor, Rect& dirty);
180 void pushLayerUpdate(Layer* layer);
181 void cancelLayerUpdate(Layer* layer);
182 void flushLayerUpdates();
183 void markLayersAsBuildLayers();
185 virtual int saveLayer(float left, float top, float right, float bottom,
186 const SkPaint* paint, int flags) {
187 return saveLayer(left, top, right, bottom, paint, flags, nullptr);
190 // Specialized saveLayer implementation, which will pass the convexMask to an FBO layer, if
191 // created, which will in turn clip to that mask when drawn back/restored.
192 int saveLayer(float left, float top, float right, float bottom,
193 const SkPaint* paint, int flags, const SkPath* convexMask);
195 int saveLayerDeferred(float left, float top, float right, float bottom,
196 const SkPaint* paint, int flags);
198 void drawRenderNode(RenderNode* displayList, Rect& dirty, int32_t replayFlags = 1);
199 void drawLayer(Layer* layer, float x, float y);
200 void drawBitmap(const SkBitmap* bitmap, const SkPaint* paint);
201 void drawBitmaps(const SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount,
202 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, const SkPaint* paint);
203 void drawBitmap(const SkBitmap* bitmap, Rect src, Rect dst,
204 const SkPaint* paint);
205 void drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight,
206 const float* vertices, const int* colors, const SkPaint* paint);
207 void drawPatches(const SkBitmap* bitmap, AssetAtlas::Entry* entry,
208 TextureVertex* vertices, uint32_t indexCount, const SkPaint* paint);
209 void drawPatch(const SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry,
210 float left, float top, float right, float bottom, const SkPaint* paint);
211 void drawColor(int color, SkXfermode::Mode mode);
212 void drawRect(float left, float top, float right, float bottom,
213 const SkPaint* paint);
214 void drawRoundRect(float left, float top, float right, float bottom,
215 float rx, float ry, const SkPaint* paint);
216 void drawCircle(float x, float y, float radius, const SkPaint* paint);
217 void drawOval(float left, float top, float right, float bottom,
218 const SkPaint* paint);
219 void drawArc(float left, float top, float right, float bottom,
220 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint);
221 void drawPath(const SkPath* path, const SkPaint* paint);
222 void drawLines(const float* points, int count, const SkPaint* paint);
223 void drawPoints(const float* points, int count, const SkPaint* paint);
224 void drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path,
225 float hOffset, float vOffset, const SkPaint* paint);
226 void drawPosText(const char* text, int bytesCount, int count,
227 const float* positions, const SkPaint* paint);
228 void drawText(const char* text, int bytesCount, int count, float x, float y,
229 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds,
230 DrawOpMode drawOpMode = DrawOpMode::kImmediate);
231 void drawRects(const float* rects, int count, const SkPaint* paint);
233 void drawShadow(float casterAlpha,
234 const VertexBuffer* ambientShadowVertexBuffer,
235 const VertexBuffer* spotShadowVertexBuffer);
237 void setDrawFilter(SkDrawFilter* filter);
239 // If this value is set to < 1.0, it overrides alpha set on layer (see drawBitmap, drawLayer)
240 void setOverrideLayerAlpha(float alpha) { mDrawModifiers.mOverrideLayerAlpha = alpha; }
243 * Store the current display state (most importantly, the current clip and transform), and
244 * additionally map the state's bounds from local to window coordinates.
246 * Returns true if quick-rejected
248 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags);
249 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false);
250 void setupMergedMultiDraw(const Rect* clipRect);
252 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; }
253 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; }
255 bool isCurrentTransformSimple() {
256 return currentTransform()->isSimple();
259 Caches& getCaches() {
263 RenderState& renderState() {
267 int getViewportWidth() { return mState.getViewportWidth(); }
268 int getViewportHeight() { return mState.getViewportHeight(); }
271 * Scales the alpha on the current snapshot. This alpha value will be modulated
272 * with other alpha values when drawing primitives.
274 void scaleAlpha(float alpha) { mState.scaleAlpha(alpha); }
277 * Inserts a named event marker in the stream of GL commands.
279 void eventMark(const char* name) const;
282 * Inserts a formatted event marker in the stream of GL commands.
284 void eventMarkDEBUG(const char *fmt, ...) const;
287 * Inserts a named group marker in the stream of GL commands. This marker
288 * can be used by tools to group commands into logical groups. A call to
289 * this method must always be followed later on by a call to endMark().
291 void startMark(const char* name) const;
294 * Closes the last group marker opened by startMark().
296 void endMark() const;
299 * Gets the alpha and xfermode out of a paint object. If the paint is null
300 * alpha will be 255 and the xfermode will be SRC_OVER. This method does
301 * not multiply the paint's alpha by the current snapshot's alpha, and does
302 * not replace the alpha with the overrideLayerAlpha
304 * @param paint The paint to extract values from
305 * @param alpha Where to store the resulting alpha
306 * @param mode Where to store the resulting xfermode
308 static inline void getAlphaAndModeDirect(const SkPaint* paint, int* alpha,
309 SkXfermode::Mode* mode) {
310 *mode = getXfermodeDirect(paint);
311 *alpha = getAlphaDirect(paint);
314 static inline SkXfermode::Mode getXfermodeDirect(const SkPaint* paint) {
315 if (!paint) return SkXfermode::kSrcOver_Mode;
316 return PaintUtils::getXfermode(paint->getXfermode());
319 static inline int getAlphaDirect(const SkPaint* paint) {
320 if (!paint) return 255;
321 return paint->getAlpha();
331 static inline bool getTextShadow(const SkPaint* paint, TextShadow* textShadow) {
332 SkDrawLooper::BlurShadowRec blur;
333 if (paint && paint->getLooper() && paint->getLooper()->asABlurShadow(&blur)) {
335 textShadow->radius = Blur::convertSigmaToRadius(blur.fSigma);
336 textShadow->dx = blur.fOffset.fX;
337 textShadow->dy = blur.fOffset.fY;
338 textShadow->color = blur.fColor;
345 static inline bool hasTextShadow(const SkPaint* paint) {
346 return getTextShadow(paint, nullptr);
350 * Build the best transform to use to rasterize text given a full
351 * transform matrix, and whether filteration is needed.
353 * Returns whether filtration is needed
355 bool findBestFontTransform(const mat4& transform, SkMatrix* outMatrix) const;
357 #if DEBUG_MERGE_BEHAVIOR
358 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) {
359 mCaches.setScissorEnabled(false);
361 // should only be called outside of other draw ops, so stencil can only be in test state
362 bool stencilWasEnabled = mCaches.stencil.isTestEnabled();
363 mCaches.stencil.disable();
365 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true);
367 if (stencilWasEnabled) mCaches.stencil.enableTest();
372 const Vector3& getLightCenter() const { return mState.currentLightCenter(); }
373 float getLightRadius() const { return mLightRadius; }
374 uint8_t getAmbientShadowAlpha() const { return mAmbientShadowAlpha; }
375 uint8_t getSpotShadowAlpha() const { return mSpotShadowAlpha; }
377 ///////////////////////////////////////////////////////////////////
378 /// State manipulation
380 int getSaveCount() const;
383 void restoreToCount(int saveCount);
385 void getMatrix(SkMatrix* outMatrix) const { mState.getMatrix(outMatrix); }
386 void setMatrix(const SkMatrix& matrix) { mState.setMatrix(matrix); }
387 void concatMatrix(const SkMatrix& matrix) { mState.concatMatrix(matrix); }
389 void translate(float dx, float dy, float dz = 0.0f);
390 void rotate(float degrees);
391 void scale(float sx, float sy);
392 void skew(float sx, float sy);
394 void setMatrix(const Matrix4& matrix); // internal only convenience method
395 void concatMatrix(const Matrix4& matrix); // internal only convenience method
397 const Rect& getLocalClipBounds() const { return mState.getLocalClipBounds(); }
398 const Rect& getRenderTargetClipBounds() const { return mState.getRenderTargetClipBounds(); }
399 bool quickRejectConservative(float left, float top,
400 float right, float bottom) const {
401 return mState.quickRejectConservative(left, top, right, bottom);
404 bool clipRect(float left, float top,
405 float right, float bottom, SkRegion::Op op);
406 bool clipPath(const SkPath* path, SkRegion::Op op);
407 bool clipRegion(const SkRegion* region, SkRegion::Op op);
410 * Does not support different clipping Ops (that is, every call to setClippingOutline is
411 * effectively using SkRegion::kReplaceOp)
413 * The clipping outline is independent from the regular clip.
415 void setClippingOutline(LinearAllocator& allocator, const Outline* outline);
416 void setClippingRoundRect(LinearAllocator& allocator,
417 const Rect& rect, float radius, bool highPriority = true);
419 inline bool hasRectToRectTransform() const { return mState.hasRectToRectTransform(); }
420 inline const mat4* currentTransform() const { return mState.currentTransform(); }
422 ///////////////////////////////////////////////////////////////////
423 /// CanvasStateClient interface
425 virtual void onViewportInitialized() override;
426 virtual void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored) override;
427 virtual GLuint getTargetFbo() const override { return 0; }
429 SkPath* allocPathForFrame() {
430 std::unique_ptr<SkPath> path(new SkPath());
431 SkPath* returnPath = path.get();
432 mTempPaths.push_back(std::move(path));
438 * Perform the setup specific to a frame. This method does not
439 * issue any OpenGL commands.
441 void setupFrameState(float left, float top, float right, float bottom, bool opaque);
444 * Indicates the start of rendering. This method will setup the
445 * initial OpenGL state (viewport, clearing the buffer, etc.)
450 * Clears the underlying surface if needed.
452 virtual void clear(float left, float top, float right, float bottom, bool opaque);
455 * Call this method after updating a layer during a drawing pass.
457 void resumeAfterLayer();
460 * This method is called whenever a stencil buffer is required. Subclasses
461 * should override this method and call attachStencilBufferToLayer() on the
462 * appropriate layer(s).
464 virtual void ensureStencilBuffer();
467 * Obtains a stencil render buffer (allocating it if necessary) and
468 * attaches it to the specified layer.
470 void attachStencilBufferToLayer(Layer* layer);
473 * Draw a rectangle list. Currently only used for the the stencil buffer so that the stencil
474 * will have a value of 'n' in every unclipped pixel, where 'n' is the number of rectangles
477 void drawRectangleList(const RectangleList& rectangleList);
479 bool quickRejectSetupScissor(float left, float top, float right, float bottom,
480 const SkPaint* paint = nullptr);
481 bool quickRejectSetupScissor(const Rect& bounds, const SkPaint* paint = nullptr) {
482 return quickRejectSetupScissor(bounds.left, bounds.top,
483 bounds.right, bounds.bottom, paint);
487 * Compose the layer defined in the current snapshot with the layer
488 * defined by the previous snapshot.
490 * The current snapshot *must* be a layer (flag kFlagIsLayer set.)
492 * @param curent The current snapshot containing the layer to compose
493 * @param previous The previous snapshot to compose the current layer with
495 virtual void composeLayer(const Snapshot& current, const Snapshot& previous);
498 * Marks the specified region as dirty at the specified bounds.
500 void dirtyLayerUnchecked(Rect& bounds, Region* region);
503 * Returns the region of the current layer.
505 virtual Region* getRegion() const {
506 return mState.currentRegion();
510 * Indicates whether rendering is currently targeted at a layer.
512 virtual bool hasLayer() const {
513 return (mState.currentFlags() & Snapshot::kFlagFboTarget) && mState.currentRegion();
517 * Renders the specified layer as a textured quad.
519 * @param layer The layer to render
520 * @param rect The bounds of the layer
522 void drawTextureLayer(Layer* layer, const Rect& rect);
525 * Gets the alpha and xfermode out of a paint object. If the paint is null
526 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for both
527 * snapshot alpha, and overrideLayerAlpha
529 * @param paint The paint to extract values from
530 * @param alpha Where to store the resulting alpha
531 * @param mode Where to store the resulting xfermode
533 inline void getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const;
536 * Gets the alpha from a layer, accounting for snapshot alpha and overrideLayerAlpha
538 * @param layer The layer from which the alpha is extracted
540 inline float getLayerAlpha(const Layer* layer) const;
543 * Safely retrieves the ColorFilter from the given Paint. If the paint is
544 * null then null is returned.
546 static inline SkColorFilter* getColorFilter(const SkPaint* paint) {
547 return paint ? paint->getColorFilter() : nullptr;
551 * Safely retrieves the Shader from the given Paint. If the paint is
552 * null then null is returned.
554 static inline const SkShader* getShader(const SkPaint* paint) {
555 return paint ? paint->getShader() : nullptr;
559 * Set to true to suppress error checks at the end of a frame.
561 virtual bool suppressErrorChecks() const {
567 RenderState& mRenderState;
570 void renderGlop(const Glop& glop, bool clearLayer = true);
573 * Discards the content of the framebuffer if supported by the driver.
574 * This method should be called at the beginning of a frame to optimize
575 * rendering on some tiler architectures.
577 void discardFramebuffer(float left, float top, float right, float bottom);
580 * Tells the GPU what part of the screen is about to be redrawn.
581 * This method will use the current layer space clip rect.
582 * This method needs to be invoked every time getTargetFbo() is
585 void startTilingCurrentClip(bool opaque = false, bool expand = false);
588 * Tells the GPU what part of the screen is about to be redrawn.
589 * This method needs to be invoked every time getTargetFbo() is
592 void startTiling(const Rect& clip, int windowHeight, bool opaque = false, bool expand = false);
595 * Tells the GPU that we are done drawing the frame or that we
596 * are switching to another render target.
601 * Sets the clipping rectangle using glScissor. The clip is defined by
602 * the current snapshot's clipRect member.
604 void setScissorFromClip();
607 * Sets the clipping region using the stencil buffer. The clip region
608 * is defined by the current snapshot's clipRegion member.
610 void setStencilFromClip();
613 * Given the local bounds of the layer, calculates ...
615 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer);
618 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible
620 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip,
621 bool fboLayer, int alpha);
624 * Creates a new layer stored in the specified snapshot.
626 * @param snapshot The snapshot associated with the new layer
627 * @param left The left coordinate of the layer
628 * @param top The top coordinate of the layer
629 * @param right The right coordinate of the layer
630 * @param bottom The bottom coordinate of the layer
631 * @param alpha The translucency of the layer
632 * @param mode The blending mode of the layer
633 * @param flags The layer save flags
634 * @param mask A mask to use when drawing the layer back, may be empty
636 * @return True if the layer was successfully created, false otherwise
638 bool createLayer(float left, float top, float right, float bottom,
639 const SkPaint* paint, int flags, const SkPath* convexMask);
642 * Creates a new layer stored in the specified snapshot as an FBO.
644 * @param layer The layer to store as an FBO
645 * @param snapshot The snapshot associated with the new layer
646 * @param bounds The bounds of the layer
648 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip);
651 * Compose the specified layer as a region.
653 * @param layer The layer to compose
654 * @param rect The layer's bounds
656 void composeLayerRegion(Layer* layer, const Rect& rect);
659 * Compose the specified layer as a simple rectangle.
661 * @param layer The layer to compose
662 * @param rect The layer's bounds
663 * @param swap If true, the source and destination are swapped
665 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false);
668 * Clears all the regions corresponding to the current list of layers.
669 * This method MUST be invoked before any drawing operation.
671 void clearLayerRegions();
674 * Mark the layer as dirty at the specified coordinates. The coordinates
675 * are transformed with the supplied matrix.
677 void dirtyLayer(const float left, const float top,
678 const float right, const float bottom, const Matrix4& transform);
681 * Mark the layer as dirty at the specified coordinates.
683 void dirtyLayer(const float left, const float top,
684 const float right, const float bottom);
687 * Draws a colored rectangle with the specified color. The specified coordinates
688 * are transformed by the current snapshot's transform matrix unless specified
691 * @param left The left coordinate of the rectangle
692 * @param top The top coordinate of the rectangle
693 * @param right The right coordinate of the rectangle
694 * @param bottom The bottom coordinate of the rectangle
695 * @param paint The paint containing the color, blending mode, etc.
696 * @param ignoreTransform True if the current transform should be ignored
698 void drawColorRect(float left, float top, float right, float bottom,
699 const SkPaint* paint, bool ignoreTransform = false);
702 * Draws a series of colored rectangles with the specified color. The specified
703 * coordinates are transformed by the current snapshot's transform matrix unless
704 * specified otherwise.
706 * @param rects A list of rectangles, 4 floats (left, top, right, bottom)
708 * @param paint The paint containing the color, blending mode, etc.
709 * @param ignoreTransform True if the current transform should be ignored
710 * @param dirty True if calling this method should dirty the current layer
711 * @param clip True if the rects should be clipped, false otherwise
713 void drawColorRects(const float* rects, int count, const SkPaint* paint,
714 bool ignoreTransform = false, bool dirty = true, bool clip = true);
717 * Draws the shape represented by the specified path texture.
718 * This method invokes drawPathTexture() but takes into account
719 * the extra left/top offset and the texture offset to correctly
720 * position the final shape.
722 * @param left The left coordinate of the shape to render
723 * @param top The top coordinate of the shape to render
724 * @param texture The texture reprsenting the shape
725 * @param paint The paint to draw the shape with
727 void drawShape(float left, float top, PathTexture* texture, const SkPaint* paint);
730 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey
731 * different compositing rules.
733 * @param texture The texture to draw with
734 * @param paint The paint to render with
736 void drawAlphaBitmap(Texture* texture, const SkPaint* paint);
739 * Renders a strip of polygons with the specified paint, used for tessellated geometry.
741 * @param vertexBuffer The VertexBuffer to be drawn
742 * @param paint The paint to render with
743 * @param flags flags with which to draw
745 void drawVertexBuffer(float translateX, float translateY, const VertexBuffer& vertexBuffer,
746 const SkPaint* paint, int flags = 0);
749 * Convenience for translating method
751 void drawVertexBuffer(const VertexBuffer& vertexBuffer,
752 const SkPaint* paint, int flags = 0) {
753 drawVertexBuffer(0.0f, 0.0f, vertexBuffer, paint, flags);
757 * Renders the convex hull defined by the specified path as a strip of polygons.
759 * @param path The hull of the path to draw
760 * @param paint The paint to render with
762 void drawConvexPath(const SkPath& path, const SkPaint* paint);
765 * Draws a textured rectangle with the specified texture.
767 * @param texture The texture to use
768 * @param paint The paint containing the alpha, blending mode, etc.
770 void drawTextureRect(Texture* texture, const SkPaint* paint);
773 * Draws a textured mesh with the specified texture. If the indices are omitted,
774 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a
777 * @param left The left coordinate of the rectangle
778 * @param top The top coordinate of the rectangle
779 * @param right The right coordinate of the rectangle
780 * @param bottom The bottom coordinate of the rectangle
781 * @param texture The texture name to map onto the rectangle
782 * @param paint The paint containing the alpha, blending mode, colorFilter, etc.
783 * @param blend True if the texture contains an alpha channel
784 * @param vertices The vertices that define the mesh
785 * @param texCoords The texture coordinates of each vertex
786 * @param elementsCount The number of elements in the mesh, required by indices
787 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped
788 * @param ignoreTransform True if the current transform should be ignored
789 * @param vbo The VBO used to draw the mesh
790 * @param modelViewMode Defines whether the model view matrix should be scaled
791 * @param dirty True if calling this method should dirty the current layer
793 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture,
794 const SkPaint* paint, bool blend,
795 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount,
796 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0,
797 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true);
799 void drawIndexedTextureMesh(float left, float top, float right, float bottom, GLuint texture,
800 const SkPaint* paint, bool blend,
801 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount,
802 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0,
803 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true);
805 void drawAlpha8TextureMesh(float left, float top, float right, float bottom,
806 GLuint texture, const SkPaint* paint,
807 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount,
808 bool ignoreTransform, ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale,
812 * Draws the specified list of vertices as quads using indexed GL_TRIANGLES.
813 * If the number of vertices to draw exceeds the number of indices we have
814 * pre-allocated, this method will generate several glDrawElements() calls.
816 void issueIndexedQuadDraw(Vertex* mesh, GLsizei quadsCount);
819 * Draws text underline and strike-through if needed.
821 * @param text The text to decor
822 * @param bytesCount The number of bytes in the text
823 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length
824 * @param x The x coordinate where the text will be drawn
825 * @param y The y coordinate where the text will be drawn
826 * @param paint The paint to draw the text with
828 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint);
831 * Draws shadow layer on text (with optional positions).
833 * @param paint The paint to draw the shadow with
834 * @param text The text to draw
835 * @param bytesCount The number of bytes in the text
836 * @param count The number of glyphs in the text
837 * @param positions The x, y positions of individual glyphs (or NULL)
838 * @param fontRenderer The font renderer object
839 * @param alpha The alpha value for drawing the shadow
840 * @param x The x coordinate where the shadow will be drawn
841 * @param y The y coordinate where the shadow will be drawn
843 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count,
844 const float* positions, FontRenderer& fontRenderer, int alpha,
848 * Draws a path texture. Path textures are alpha8 bitmaps that need special
849 * compositing to apply colors/filters/etc.
851 * @param texture The texture to render
852 * @param x The x coordinate where the texture will be drawn
853 * @param y The y coordinate where the texture will be drawn
854 * @param paint The paint to draw the texture with
856 void drawPathTexture(PathTexture* texture, float x, float y, const SkPaint* paint);
859 * Resets the texture coordinates stored in mMeshVertices. Setting the values
860 * back to default is achieved by calling:
862 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f);
864 * @param u1 The left coordinate of the texture
865 * @param v1 The bottom coordinate of the texture
866 * @param u2 The right coordinate of the texture
867 * @param v2 The top coordinate of the texture
869 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2);
872 * Returns true if the specified paint will draw invisible text.
874 bool canSkipText(const SkPaint* paint) const;
877 * Enable or disable blending as necessary. This function sets the appropriate
878 * blend function based on the specified xfermode.
880 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description,
881 bool swapSrcDst = false);
884 * Invoked before any drawing operation. This sets required state.
886 void setupDraw(bool clear = true);
889 * Various methods to setup OpenGL rendering.
891 void setupDrawWithTexture(bool isAlpha8 = false);
892 void setupDrawWithTextureAndColor(bool isAlpha8 = false);
893 void setupDrawWithExternalTexture();
894 void setupDrawNoTexture();
895 void setupDrawVertexAlpha(bool useShadowAlphaInterp);
896 void setupDrawColor(int color, int alpha);
897 void setupDrawColor(float r, float g, float b, float a);
898 void setupDrawAlpha8Color(int color, int alpha);
899 void setupDrawTextGamma(const SkPaint* paint);
900 void setupDrawShader(const SkShader* shader);
901 void setupDrawColorFilter(const SkColorFilter* filter);
902 void setupDrawBlending(const Layer* layer, bool swapSrcDst = false);
903 void setupDrawBlending(const SkPaint* paint, bool blend = true, bool swapSrcDst = false);
904 void setupDrawProgram();
905 void setupDrawDirtyRegionsDisabled();
908 * Setup the current program matrices based upon the nature of the geometry.
910 * @param mode If kModelViewMode_Translate, the geometry must be translated by the left and top
911 * parameters. If kModelViewMode_TranslateAndScale, the geometry that exists in the (0,0, 1,1)
912 * space must be scaled up and translated to fill the quad provided in (l,t,r,b). These
913 * transformations are stored in the modelView matrix and uploaded to the shader.
915 * @param offset Set to true if the the matrix should be fudged (translated) slightly to
916 * disambiguate geometry pixel positioning. See Vertex::GeometryFudgeFactor().
918 * @param ignoreTransform Set to true if l,t,r,b coordinates already in layer space,
919 * currentTransform() will be ignored. (e.g. when drawing clip in layer coordinates to stencil,
920 * or when simple translation has been extracted)
922 void setupDrawModelView(ModelViewMode mode, bool offset,
923 float left, float top, float right, float bottom, bool ignoreTransform = false);
924 void setupDrawColorUniforms(bool hasShader);
925 void setupDrawPureColorUniforms();
928 * Setup uniforms for the current shader.
930 * @param shader SkShader on the current paint.
932 * @param ignoreTransform Set to true to ignore the transform in shader.
934 void setupDrawShaderUniforms(const SkShader* shader, bool ignoreTransform = false);
935 void setupDrawColorFilterUniforms(const SkColorFilter* paint);
936 void setupDrawSimpleMesh();
937 void setupDrawTexture(GLuint texture);
938 void setupDrawExternalTexture(GLuint texture);
939 void setupDrawTextureTransform();
940 void setupDrawTextureTransformUniforms(mat4& transform);
941 void setupDrawTextGammaUniforms();
942 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords = nullptr, GLuint vbo = 0);
943 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords, const GLvoid* colors);
944 void setupDrawMeshIndices(const GLvoid* vertices, const GLvoid* texCoords, GLuint vbo = 0);
945 void setupDrawIndexedVertices(GLvoid* vertices);
946 void accountForClear(SkXfermode::Mode mode);
948 bool updateLayer(Layer* layer, bool inFrame);
952 #if DEBUG_LAYERS_AS_REGIONS
954 * Renders the specified region as a series of rectangles. This method
955 * is used for debugging only.
957 void drawRegionRectsDebug(const Region& region);
961 * Renders the specified region as a series of rectangles. The region
962 * must be in screen-space coordinates.
964 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false);
967 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS
972 void debugOverdraw(bool enable, bool clear);
973 void renderOverdraw();
974 void countOverdraw();
977 * Should be invoked every time the glScissor is modified.
979 inline void dirtyClip() { mState.setDirtyClip(true); }
981 inline const UvMapper& getMapper(const Texture* texture) {
982 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper;
986 * Returns a texture object for the specified bitmap. The texture can
987 * come from the texture cache or an atlas. If this method returns
988 * NULL, the texture could not be found and/or allocated.
990 Texture* getTexture(const SkBitmap* bitmap);
992 bool reportAndClearDirty() { bool ret = mDirty; mDirty = false; return ret; }
993 inline Snapshot* writableSnapshot() { return mState.writableSnapshot(); }
994 inline const Snapshot* currentSnapshot() const { return mState.currentSnapshot(); }
997 * Model-view matrix used to position/size objects
999 * Stores operation-local modifications to the draw matrix that aren't incorporated into the
1000 * currentTransform().
1002 * If generated with kModelViewMode_Translate, mModelViewMatrix will reflect an x/y offset,
1003 * e.g. the offset in drawLayer(). If generated with kModelViewMode_TranslateAndScale,
1004 * mModelViewMatrix will reflect a translation and scale, e.g. the translation and scale
1005 * required to make VBO 0 (a rect of (0,0,1,1)) scaled to match the x,y offset, and width/height
1008 * Used as input to SkiaShader transformation.
1010 mat4 mModelViewMatrix;
1012 // State used to define the clipping region
1014 // Is the target render surface opaque
1016 // Is a frame currently being rendered
1019 // Used to draw textured quads
1020 TextureVertex mMeshVertices[4];
1022 // Default UV mapper
1023 const UvMapper mUvMapper;
1025 // shader, filters, and shadow
1026 DrawModifiers mDrawModifiers;
1027 SkPaint mFilteredPaint;
1029 // List of rectangles to clear after saveLayer() is invoked
1030 std::vector<Rect> mLayers;
1031 // List of layers to update at the beginning of a frame
1032 Vector< sp<Layer> > mLayerUpdates;
1034 // The following fields are used to setup drawing
1035 // Used to describe the shaders to generate
1036 ProgramDescription mDescription;
1037 // Color description
1040 // Indicates that the shader should get a color
1041 bool mSetShaderColor;
1042 // Current texture unit
1043 GLuint mTextureUnit;
1044 // Track dirty regions, true by default
1045 bool mTrackDirtyRegions;
1046 // Indicate whether we are drawing an opaque frame
1049 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in
1051 bool mScissorOptimizationDisabled;
1053 // No-ops start/endTiling when set
1054 bool mSuppressTiling;
1055 bool mFirstFrameAfterResize;
1057 bool mSkipOutlineClip;
1059 // True if anything has been drawn since the last call to
1060 // reportAndClearDirty()
1063 // Lighting + shadows
1064 Vector3 mLightCenter;
1066 uint8_t mAmbientShadowAlpha;
1067 uint8_t mSpotShadowAlpha;
1069 // Paths kept alive for the duration of the frame
1070 std::vector<std::unique_ptr<SkPath>> mTempPaths;
1073 friend class TextSetupFunctor;
1074 friend class DrawBitmapOp;
1075 friend class DrawPatchOp;
1077 }; // class OpenGLRenderer
1079 }; // namespace uirenderer
1080 }; // namespace android
1082 #endif // ANDROID_HWUI_OPENGL_RENDERER_H