| |
| /* |
| * Copyright 2012 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "GrClipMaskManager.h" |
| #include "GrGpu.h" |
| #include "GrRenderTarget.h" |
| #include "GrStencilBuffer.h" |
| #include "GrPathRenderer.h" |
| #include "GrPaint.h" |
| |
| //#define GR_AA_CLIP 1 |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| void ScissoringSettings::setupScissoring(GrGpu* gpu) { |
| if (!fEnableScissoring) { |
| gpu->disableScissor(); |
| return; |
| } |
| |
| gpu->enableScissoring(fScissorRect); |
| } |
| |
| namespace { |
| // set up the draw state to enable the aa clipping mask. Besides setting up the |
| // sampler matrix this also alters the vertex layout |
| void setupDrawStateAAClip(GrGpu* gpu, GrTexture* result, const GrRect &bound) { |
| GrDrawState* drawState = gpu->drawState(); |
| GrAssert(drawState); |
| |
| static const int maskStage = GrPaint::kTotalStages+1; |
| |
| GrMatrix mat; |
| mat.setIDiv(result->width(), result->height()); |
| mat.preTranslate(-bound.fLeft, -bound.fTop); |
| mat.preConcat(drawState->getViewMatrix()); |
| |
| drawState->sampler(maskStage)->reset(GrSamplerState::kClamp_WrapMode, |
| GrSamplerState::kNearest_Filter, |
| mat); |
| |
| drawState->setTexture(maskStage, result); |
| |
| // The AA clipping determination happens long after the geometry has |
| // been set up to draw. Here we directly enable the AA clip mask stage |
| gpu->addToVertexLayout( |
| GrDrawTarget::StagePosAsTexCoordVertexLayoutBit(maskStage)); |
| } |
| |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // sort out what kind of clip mask needs to be created: alpha, stencil |
| // or scissor |
| bool GrClipMaskManager::createClipMask(GrGpu* gpu, |
| const GrClip& clipIn, |
| ScissoringSettings* scissorSettings) { |
| |
| GrAssert(scissorSettings); |
| |
| scissorSettings->fEnableScissoring = false; |
| fClipMaskInStencil = false; |
| fClipMaskInAlpha = false; |
| |
| GrDrawState* drawState = gpu->drawState(); |
| if (!drawState->isClipState()) { |
| return true; |
| } |
| |
| GrRenderTarget* rt = drawState->getRenderTarget(); |
| |
| // GrDrawTarget should have filtered this for us |
| GrAssert(NULL != rt); |
| |
| #if GR_AA_CLIP |
| // If MSAA is enabled use the (faster) stencil path for AA clipping |
| // otherwise the alpha clip mask is our only option |
| if (clipIn.requiresAA() && 0 == rt->numSamples()) { |
| // Since we are going to create a destination texture of the correct |
| // size for the mask (rather than being bound by the size of the |
| // render target) we aren't going to use scissoring like the stencil |
| // path does (see scissorSettings below) |
| GrTexture* result = NULL; |
| GrRect bound; |
| if (this->createAlphaClipMask(gpu, clipIn, &result, &bound)) { |
| fClipMaskInAlpha = true; |
| |
| setupDrawStateAAClip(gpu, result, bound); |
| return true; |
| } |
| |
| // if alpha clip mask creation fails fall through to the stencil |
| // buffer method |
| } |
| #endif // GR_AA_CLIP |
| |
| GrRect bounds; |
| GrRect rtRect; |
| rtRect.setLTRB(0, 0, |
| GrIntToScalar(rt->width()), GrIntToScalar(rt->height())); |
| if (clipIn.hasConservativeBounds()) { |
| bounds = clipIn.getConservativeBounds(); |
| if (!bounds.intersect(rtRect)) { |
| bounds.setEmpty(); |
| } |
| } else { |
| bounds = rtRect; |
| } |
| |
| bounds.roundOut(&scissorSettings->fScissorRect); |
| if (scissorSettings->fScissorRect.isEmpty()) { |
| scissorSettings->fScissorRect.setLTRB(0,0,0,0); |
| // TODO: I think we can do an early exit here - after refactoring try: |
| // set fEnableScissoring to true but leave fClipMaskInStencil false |
| // and return - everything is going to be scissored away anyway! |
| } |
| scissorSettings->fEnableScissoring = true; |
| |
| // use the stencil clip if we can't represent the clip as a rectangle. |
| fClipMaskInStencil = !clipIn.isRect() && !clipIn.isEmpty() && |
| !bounds.isEmpty(); |
| |
| if (fClipMaskInStencil) { |
| return this->createStencilClipMask(gpu, clipIn, bounds, scissorSettings); |
| } |
| |
| return true; |
| } |
| |
| #define VISUALIZE_COMPLEX_CLIP 0 |
| |
| #if VISUALIZE_COMPLEX_CLIP |
| #include "GrRandom.h" |
| GrRandom gRandom; |
| #define SET_RANDOM_COLOR drawState->setColor(0xff000000 | gRandom.nextU()); |
| #else |
| #define SET_RANDOM_COLOR |
| #endif |
| |
| namespace { |
| //////////////////////////////////////////////////////////////////////////////// |
| // determines how many elements at the head of the clip can be skipped and |
| // whether the initial clear should be to the inside- or outside-the-clip value, |
| // and what op should be used to draw the first element that isn't skipped. |
| int process_initial_clip_elements(const GrClip& clip, |
| const GrRect& bounds, |
| bool* clearToInside, |
| SkRegion::Op* startOp) { |
| |
| // logically before the first element of the clip stack is |
| // processed the clip is entirely open. However, depending on the |
| // first set op we may prefer to clear to 0 for performance. We may |
| // also be able to skip the initial clip paths/rects. We loop until |
| // we cannot skip an element. |
| int curr; |
| bool done = false; |
| *clearToInside = true; |
| int count = clip.getElementCount(); |
| |
| for (curr = 0; curr < count && !done; ++curr) { |
| switch (clip.getOp(curr)) { |
| case SkRegion::kReplace_Op: |
| // replace ignores everything previous |
| *startOp = SkRegion::kReplace_Op; |
| *clearToInside = false; |
| done = true; |
| break; |
| case SkRegion::kIntersect_Op: |
| // if this element contains the entire bounds then we |
| // can skip it. |
| if (kRect_ClipType == clip.getElementType(curr) |
| && clip.getRect(curr).contains(bounds)) { |
| break; |
| } |
| // if everything is initially clearToInside then intersect is |
| // same as clear to 0 and treat as a replace. Otherwise, |
| // set stays empty. |
| if (*clearToInside) { |
| *startOp = SkRegion::kReplace_Op; |
| *clearToInside = false; |
| done = true; |
| } |
| break; |
| // we can skip a leading union. |
| case SkRegion::kUnion_Op: |
| // if everything is initially outside then union is |
| // same as replace. Otherwise, every pixel is still |
| // clearToInside |
| if (!*clearToInside) { |
| *startOp = SkRegion::kReplace_Op; |
| done = true; |
| } |
| break; |
| case SkRegion::kXOR_Op: |
| // xor is same as difference or replace both of which |
| // can be 1-pass instead of 2 for xor. |
| if (*clearToInside) { |
| *startOp = SkRegion::kDifference_Op; |
| } else { |
| *startOp = SkRegion::kReplace_Op; |
| } |
| done = true; |
| break; |
| case SkRegion::kDifference_Op: |
| // if all pixels are clearToInside then we have to process the |
| // difference, otherwise it has no effect and all pixels |
| // remain outside. |
| if (*clearToInside) { |
| *startOp = SkRegion::kDifference_Op; |
| done = true; |
| } |
| break; |
| case SkRegion::kReverseDifference_Op: |
| // if all pixels are clearToInside then reverse difference |
| // produces empty set. Otherise it is same as replace |
| if (*clearToInside) { |
| *clearToInside = false; |
| } else { |
| *startOp = SkRegion::kReplace_Op; |
| done = true; |
| } |
| break; |
| default: |
| GrCrash("Unknown set op."); |
| } |
| } |
| return done ? curr-1 : count; |
| } |
| |
| } |
| |
| |
| namespace { |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // set up the OpenGL blend function to perform the specified |
| // boolean operation for alpha clip mask creation |
| void setUpBooleanBlendCoeffs(GrDrawState* drawState, SkRegion::Op op) { |
| |
| switch (op) { |
| case SkRegion::kReplace_Op: |
| drawState->setBlendFunc(kOne_BlendCoeff, kZero_BlendCoeff); |
| break; |
| case SkRegion::kIntersect_Op: |
| drawState->setBlendFunc(kDC_BlendCoeff, kZero_BlendCoeff); |
| break; |
| case SkRegion::kUnion_Op: |
| drawState->setBlendFunc(kOne_BlendCoeff, kISC_BlendCoeff); |
| break; |
| case SkRegion::kXOR_Op: |
| drawState->setBlendFunc(kIDC_BlendCoeff, kISC_BlendCoeff); |
| break; |
| case SkRegion::kDifference_Op: |
| drawState->setBlendFunc(kZero_BlendCoeff, kISC_BlendCoeff); |
| break; |
| case SkRegion::kReverseDifference_Op: |
| drawState->setBlendFunc(kIDC_BlendCoeff, kZero_BlendCoeff); |
| break; |
| default: |
| GrAssert(false); |
| break; |
| } |
| } |
| |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| bool GrClipMaskManager::drawPath(GrGpu* gpu, |
| const SkPath& path, |
| GrPathFill fill, |
| bool doAA) { |
| |
| GrPathRenderer* pr = this->getClipPathRenderer(gpu, path, fill, doAA); |
| if (NULL == pr) { |
| return false; |
| } |
| |
| pr->drawPath(path, fill, NULL, gpu, 0, doAA); |
| return true; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| bool GrClipMaskManager::drawClipShape(GrGpu* gpu, |
| GrTexture* target, |
| const GrClip& clipIn, |
| int index) { |
| GrDrawState* drawState = gpu->drawState(); |
| GrAssert(NULL != drawState); |
| |
| drawState->setRenderTarget(target->asRenderTarget()); |
| |
| if (kRect_ClipType == clipIn.getElementType(index)) { |
| if (clipIn.getDoAA(index)) { |
| // convert the rect to a path for AA |
| SkPath temp; |
| temp.addRect(clipIn.getRect(index)); |
| |
| return this->drawPath(gpu, temp, |
| kEvenOdd_PathFill, clipIn.getDoAA(index)); |
| } else { |
| gpu->drawSimpleRect(clipIn.getRect(index), NULL, 0); |
| } |
| } else { |
| return this->drawPath(gpu, |
| clipIn.getPath(index), |
| clipIn.getPathFill(index), |
| clipIn.getDoAA(index)); |
| } |
| return true; |
| } |
| |
| void GrClipMaskManager::drawTexture(GrGpu* gpu, |
| GrTexture* target, |
| const GrRect& rect, |
| GrTexture* texture) { |
| GrDrawState* drawState = gpu->drawState(); |
| GrAssert(NULL != drawState); |
| |
| // no AA here since it is encoded in the texture |
| drawState->setRenderTarget(target->asRenderTarget()); |
| |
| GrMatrix sampleM; |
| sampleM.setIDiv(texture->width(), texture->height()); |
| drawState->setTexture(0, texture); |
| |
| drawState->sampler(0)->reset(GrSamplerState::kClamp_WrapMode, |
| GrSamplerState::kNearest_Filter, |
| sampleM); |
| |
| gpu->drawSimpleRect(rect, NULL, 1 << 0); |
| |
| drawState->setTexture(0, NULL); |
| } |
| |
| namespace { |
| |
| void clear(GrGpu* gpu, |
| GrTexture* target, |
| GrColor color) { |
| GrDrawState* drawState = gpu->drawState(); |
| GrAssert(NULL != drawState); |
| |
| // zap entire target to specified color |
| drawState->setRenderTarget(target->asRenderTarget()); |
| gpu->clear(NULL, color); |
| } |
| |
| // get a texture to act as a temporary buffer for AA clip boolean operations |
| // TODO: given the expense of createTexture we may want to just cache this too |
| void needTemp(GrGpu *gpu, const GrTextureDesc& desc, GrTexture** temp) { |
| if (NULL != *temp) { |
| // we've already allocated the temp texture |
| return; |
| } |
| |
| *temp = gpu->createTexture(desc, NULL, 0); |
| } |
| |
| } |
| |
| void GrClipMaskManager::getAccum(GrGpu* gpu, |
| const GrTextureDesc& desc, |
| GrTexture** accum) { |
| GrAssert(NULL == *accum); |
| |
| // since we are getting an accumulator we know our cache is shot. See |
| // if we can reuse the texture stored in the cache |
| if (fAACache.getLastMaskWidth() >= desc.fWidth && |
| fAACache.getLastMaskHeight() >= desc.fHeight) { |
| // we can just reuse the existing texture |
| *accum = fAACache.detachLastMask(); |
| fAACache.reset(); |
| } else { |
| *accum = gpu->createTexture(desc, NULL, 0); |
| } |
| |
| GrAssert(1 == (*accum)->getRefCnt()); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // Create a 8-bit clip mask in alpha |
| bool GrClipMaskManager::createAlphaClipMask(GrGpu* gpu, |
| const GrClip& clipIn, |
| GrTexture** result, |
| GrRect *resultBounds) { |
| |
| GrDrawState* origDrawState = gpu->drawState(); |
| GrAssert(origDrawState->isClipState()); |
| |
| GrRenderTarget* rt = origDrawState->getRenderTarget(); |
| GrAssert(NULL != rt); |
| |
| GrRect rtRect; |
| rtRect.setLTRB(0, 0, |
| GrIntToScalar(rt->width()), GrIntToScalar(rt->height())); |
| |
| |
| // unlike the stencil path the alpha path is not bound to the size of the |
| // render target - determine the minimum size required for the mask |
| GrRect bounds; |
| |
| if (clipIn.hasConservativeBounds()) { |
| bounds = clipIn.getConservativeBounds(); |
| if (!bounds.intersect(rtRect)) { |
| // the mask will be empty in this case |
| GrAssert(false); |
| bounds.setEmpty(); |
| } |
| } else { |
| // still locked to the size of the render target |
| bounds = rtRect; |
| } |
| |
| bounds.roundOut(); |
| |
| // need to outset a pixel since the standard bounding box computation |
| // path doesn't leave any room for antialiasing (esp. w.r.t. rects) |
| bounds.outset(SkIntToScalar(1), SkIntToScalar(1)); |
| |
| // TODO: make sure we don't outset if bounds are still 0,0 @ min |
| |
| GrAssert(SkScalarIsInt(bounds.width())); |
| GrAssert(SkScalarIsInt(bounds.height())); |
| |
| if (fAACache.canReuse(clipIn, |
| SkScalarCeilToInt(bounds.width()), |
| SkScalarCeilToInt(bounds.height()))) { |
| *result = fAACache.getLastMask(); |
| fAACache.getLastBound(resultBounds); |
| return true; |
| } |
| |
| const GrTextureDesc desc = { |
| kRenderTarget_GrTextureFlagBit|kNoStencil_GrTextureFlagBit, |
| SkScalarCeilToInt(bounds.width()), |
| SkScalarCeilToInt(bounds.height()), |
| kAlpha_8_GrPixelConfig, |
| 0 // samples |
| }; |
| |
| GrRect newRTBounds; |
| newRTBounds.setLTRB(0, 0, bounds.width(), bounds.height()); |
| |
| GrTexture* accum = NULL, *temp = NULL; |
| |
| getAccum(gpu, desc, &accum); |
| if (NULL == accum) { |
| fClipMaskInAlpha = false; |
| SkSafeUnref(accum); |
| return false; |
| } |
| |
| GrDrawTarget::AutoStateRestore asr(gpu, GrDrawTarget::kReset_ASRInit); |
| GrDrawState* drawState = gpu->drawState(); |
| |
| GrDrawTarget::AutoGeometryPush agp(gpu); |
| |
| int count = clipIn.getElementCount(); |
| |
| if (0 != bounds.fTop || 0 != bounds.fLeft) { |
| // if we were able to trim down the size of the mask we need to |
| // offset the paths & rects that will be used to compute it |
| GrMatrix m; |
| |
| m.setTranslate(-bounds.fLeft, -bounds.fTop); |
| |
| drawState->setViewMatrix(m); |
| } |
| |
| bool clearToInside; |
| SkRegion::Op startOp = SkRegion::kReplace_Op; // suppress warning |
| int start = process_initial_clip_elements(clipIn, |
| bounds, |
| &clearToInside, |
| &startOp); |
| |
| clear(gpu, accum, clearToInside ? 0xffffffff : 0x00000000); |
| |
| // walk through each clip element and perform its set op |
| for (int c = start; c < count; ++c) { |
| |
| SkRegion::Op op = (c == start) ? startOp : clipIn.getOp(c); |
| |
| if (SkRegion::kReplace_Op == op) { |
| // TODO: replace is actually a lot faster then intersection |
| // for this path - refactor the stencil path so it can handle |
| // replace ops and alter GrClip to allow them through |
| |
| // clear the accumulator and draw the new object directly into it |
| clear(gpu, accum, 0x00000000); |
| |
| setUpBooleanBlendCoeffs(drawState, op); |
| this->drawClipShape(gpu, accum, clipIn, c); |
| |
| } else if (SkRegion::kReverseDifference_Op == op || |
| SkRegion::kIntersect_Op == op) { |
| // there is no point in intersecting a screen filling rectangle. |
| if (SkRegion::kIntersect_Op == op && |
| kRect_ClipType == clipIn.getElementType(c) && |
| clipIn.getRect(c).contains(bounds)) { |
| continue; |
| } |
| |
| needTemp(gpu, desc, &temp); |
| if (NULL == temp) { |
| fClipMaskInAlpha = false; |
| SkSafeUnref(accum); |
| return false; |
| } |
| |
| // clear the temp target & draw into it |
| clear(gpu, temp, 0x00000000); |
| |
| setUpBooleanBlendCoeffs(drawState, SkRegion::kReplace_Op); |
| this->drawClipShape(gpu, temp, clipIn, c); |
| |
| // TODO: rather than adding these two translations here |
| // compute the bounding box needed to render the texture |
| // into temp |
| if (0 != bounds.fTop || 0 != bounds.fLeft) { |
| GrMatrix m; |
| |
| m.setTranslate(bounds.fLeft, bounds.fTop); |
| |
| drawState->preConcatViewMatrix(m); |
| } |
| |
| // Now draw into the accumulator using the real operation |
| // and the temp buffer as a texture |
| setUpBooleanBlendCoeffs(drawState, op); |
| this->drawTexture(gpu, accum, newRTBounds, temp); |
| |
| if (0 != bounds.fTop || 0 != bounds.fLeft) { |
| GrMatrix m; |
| |
| m.setTranslate(-bounds.fLeft, -bounds.fTop); |
| |
| drawState->preConcatViewMatrix(m); |
| } |
| |
| } else { |
| // all the remaining ops can just be directly draw into |
| // the accumulation buffer |
| setUpBooleanBlendCoeffs(drawState, op); |
| this->drawClipShape(gpu, accum, clipIn, c); |
| } |
| } |
| |
| fAACache.set(clipIn, accum, bounds); |
| *result = accum; |
| *resultBounds = bounds; |
| SkSafeUnref(accum); // fAACache still has a ref to accum |
| SkSafeUnref(temp); |
| |
| return true; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // Create a 1-bit clip mask in the stencil buffer |
| bool GrClipMaskManager::createStencilClipMask(GrGpu* gpu, |
| const GrClip& clipIn, |
| const GrRect& bounds, |
| ScissoringSettings* scissorSettings) { |
| |
| GrAssert(fClipMaskInStencil); |
| |
| GrDrawState* drawState = gpu->drawState(); |
| GrAssert(drawState->isClipState()); |
| |
| GrRenderTarget* rt = drawState->getRenderTarget(); |
| GrAssert(NULL != rt); |
| |
| // TODO: dynamically attach a SB when needed. |
| GrStencilBuffer* stencilBuffer = rt->getStencilBuffer(); |
| if (NULL == stencilBuffer) { |
| return false; |
| } |
| |
| if (stencilBuffer->mustRenderClip(clipIn, rt->width(), rt->height())) { |
| |
| stencilBuffer->setLastClip(clipIn, rt->width(), rt->height()); |
| |
| // we set the current clip to the bounds so that our recursive |
| // draws are scissored to them. We use the copy of the complex clip |
| // we just stashed on the SB to render from. We set it back after |
| // we finish drawing it into the stencil. |
| const GrClip& clipCopy = stencilBuffer->getLastClip(); |
| gpu->setClip(GrClip(bounds)); |
| |
| GrDrawTarget::AutoStateRestore asr(gpu, GrDrawTarget::kReset_ASRInit); |
| drawState = gpu->drawState(); |
| drawState->setRenderTarget(rt); |
| GrDrawTarget::AutoGeometryPush agp(gpu); |
| |
| gpu->disableScissor(); |
| #if !VISUALIZE_COMPLEX_CLIP |
| drawState->enableState(GrDrawState::kNoColorWrites_StateBit); |
| #endif |
| |
| int count = clipCopy.getElementCount(); |
| int clipBit = stencilBuffer->bits(); |
| SkASSERT((clipBit <= 16) && |
| "Ganesh only handles 16b or smaller stencil buffers"); |
| clipBit = (1 << (clipBit-1)); |
| |
| GrRect rtRect; |
| rtRect.setLTRB(0, 0, |
| GrIntToScalar(rt->width()), GrIntToScalar(rt->height())); |
| |
| bool clearToInside; |
| SkRegion::Op startOp = SkRegion::kReplace_Op; // suppress warning |
| int start = process_initial_clip_elements(clipCopy, |
| rtRect, |
| &clearToInside, |
| &startOp); |
| |
| gpu->clearStencilClip(scissorSettings->fScissorRect, clearToInside); |
| |
| // walk through each clip element and perform its set op |
| // with the existing clip. |
| for (int c = start; c < count; ++c) { |
| GrPathFill fill; |
| bool fillInverted; |
| // enabled at bottom of loop |
| drawState->disableState(GrGpu::kModifyStencilClip_StateBit); |
| |
| bool canRenderDirectToStencil; // can the clip element be drawn |
| // directly to the stencil buffer |
| // with a non-inverted fill rule |
| // without extra passes to |
| // resolve in/out status. |
| |
| SkRegion::Op op = (c == start) ? startOp : clipCopy.getOp(c); |
| |
| GrPathRenderer* pr = NULL; |
| const SkPath* clipPath = NULL; |
| if (kRect_ClipType == clipCopy.getElementType(c)) { |
| canRenderDirectToStencil = true; |
| fill = kEvenOdd_PathFill; |
| fillInverted = false; |
| // there is no point in intersecting a screen filling |
| // rectangle. |
| if (SkRegion::kIntersect_Op == op && |
| clipCopy.getRect(c).contains(rtRect)) { |
| continue; |
| } |
| } else { |
| fill = clipCopy.getPathFill(c); |
| fillInverted = GrIsFillInverted(fill); |
| fill = GrNonInvertedFill(fill); |
| clipPath = &clipCopy.getPath(c); |
| pr = this->getClipPathRenderer(gpu, *clipPath, fill, false); |
| if (NULL == pr) { |
| fClipMaskInStencil = false; |
| gpu->setClip(clipCopy); // restore to the original |
| return false; |
| } |
| canRenderDirectToStencil = |
| !pr->requiresStencilPass(*clipPath, fill, gpu); |
| } |
| |
| int passes; |
| GrStencilSettings stencilSettings[GrStencilSettings::kMaxStencilClipPasses]; |
| |
| bool canDrawDirectToClip; // Given the renderer, the element, |
| // fill rule, and set operation can |
| // we render the element directly to |
| // stencil bit used for clipping. |
| canDrawDirectToClip = |
| GrStencilSettings::GetClipPasses(op, |
| canRenderDirectToStencil, |
| clipBit, |
| fillInverted, |
| &passes, stencilSettings); |
| |
| // draw the element to the client stencil bits if necessary |
| if (!canDrawDirectToClip) { |
| GR_STATIC_CONST_SAME_STENCIL(gDrawToStencil, |
| kIncClamp_StencilOp, |
| kIncClamp_StencilOp, |
| kAlways_StencilFunc, |
| 0xffff, |
| 0x0000, |
| 0xffff); |
| SET_RANDOM_COLOR |
| if (kRect_ClipType == clipCopy.getElementType(c)) { |
| *drawState->stencil() = gDrawToStencil; |
| gpu->drawSimpleRect(clipCopy.getRect(c), NULL, 0); |
| } else { |
| if (canRenderDirectToStencil) { |
| *drawState->stencil() = gDrawToStencil; |
| pr->drawPath(*clipPath, fill, NULL, gpu, 0, false); |
| } else { |
| pr->drawPathToStencil(*clipPath, fill, gpu); |
| } |
| } |
| } |
| |
| // now we modify the clip bit by rendering either the clip |
| // element directly or a bounding rect of the entire clip. |
| drawState->enableState(GrGpu::kModifyStencilClip_StateBit); |
| for (int p = 0; p < passes; ++p) { |
| *drawState->stencil() = stencilSettings[p]; |
| if (canDrawDirectToClip) { |
| if (kRect_ClipType == clipCopy.getElementType(c)) { |
| SET_RANDOM_COLOR |
| gpu->drawSimpleRect(clipCopy.getRect(c), NULL, 0); |
| } else { |
| SET_RANDOM_COLOR |
| pr->drawPath(*clipPath, fill, NULL, gpu, 0, false); |
| } |
| } else { |
| SET_RANDOM_COLOR |
| gpu->drawSimpleRect(bounds, NULL, 0); |
| } |
| } |
| } |
| // restore clip |
| gpu->setClip(clipCopy); |
| // recusive draws would have disabled this since they drew with |
| // the clip bounds as clip. |
| fClipMaskInStencil = true; |
| } |
| |
| return true; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| GrPathRenderer* GrClipMaskManager::getClipPathRenderer(GrGpu* gpu, |
| const SkPath& path, |
| GrPathFill fill, |
| bool antiAlias) { |
| if (NULL == fPathRendererChain) { |
| fPathRendererChain = |
| new GrPathRendererChain(gpu->getContext(), |
| GrPathRendererChain::kNone_UsageFlag); |
| } |
| return fPathRendererChain->getPathRenderer(path, fill, gpu, antiAlias); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| void GrClipMaskManager::freeResources() { |
| // in case path renderer has any GrResources, start from scratch |
| GrSafeSetNull(fPathRendererChain); |
| } |