The Tor Browser: gfx/skia/trunk/src/gpu/GrInOrderDrawBuffer.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/gpu/GrInOrderDrawBuffer.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/gpu/GrInOrderDrawBuffer.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "GrInOrderDrawBuffer.h"
 #include "GrBufferAllocPool.h"
 #include "GrDrawTargetCaps.h"
 #include "GrGpu.h"
 #include "GrIndexBuffer.h"
 #include "GrPath.h"
 #include "GrPoint.h"
 #include "GrRenderTarget.h"
 #include "GrTemplates.h"
 #include "GrTexture.h"
 #include "GrVertexBuffer.h"
 GrInOrderDrawBuffer::GrInOrderDrawBuffer(GrGpu* gpu,
                                          GrVertexBufferAllocPool* vertexPool,
                                          GrIndexBufferAllocPool* indexPool)
     : GrDrawTarget(gpu->getContext())
     , fDstGpu(gpu)
     , fClipSet(true)
     , fClipProxyState(kUnknown_ClipProxyState)
     , fVertexPool(*vertexPool)
     , fIndexPool(*indexPool)
     , fFlushing(false)
     , fDrawID(0) {
     fDstGpu->ref();
     fCaps.reset(SkRef(fDstGpu->caps()));
     SkASSERT(NULL != vertexPool);
     SkASSERT(NULL != indexPool);
     GeometryPoolState& poolState = fGeoPoolStateStack.push_back();
     poolState.fUsedPoolVertexBytes = 0;
     poolState.fUsedPoolIndexBytes = 0;
 #ifdef SK_DEBUG
     poolState.fPoolVertexBuffer = (GrVertexBuffer*)~0;
     poolState.fPoolStartVertex = ~0;
     poolState.fPoolIndexBuffer = (GrIndexBuffer*)~0;
     poolState.fPoolStartIndex = ~0;
 #endif
     this->reset();
 }
 GrInOrderDrawBuffer::~GrInOrderDrawBuffer() {
     this->reset();
     // This must be called by before the GrDrawTarget destructor
     this->releaseGeometry();
     fDstGpu->unref();
 }
 ////////////////////////////////////////////////////////////////////////////////
 namespace {
 void get_vertex_bounds(const void* vertices,
                        size_t vertexSize,
                        int vertexCount,
                        SkRect* bounds) {
     SkASSERT(vertexSize >= sizeof(GrPoint));
     SkASSERT(vertexCount > 0);
     const GrPoint* point = static_cast<const GrPoint*>(vertices);
     bounds->fLeft = bounds->fRight = point->fX;
     bounds->fTop = bounds->fBottom = point->fY;
     for (int i = 1; i < vertexCount; ++i) {
         point = reinterpret_cast<GrPoint*>(reinterpret_cast<intptr_t>(point) + vertexSize);
         bounds->growToInclude(point->fX, point->fY);
     }
 }
 }
 namespace {
 extern const GrVertexAttrib kRectPosColorUVAttribs[] = {
     {kVec2f_GrVertexAttribType,  0,               kPosition_GrVertexAttribBinding},
     {kVec4ub_GrVertexAttribType, sizeof(GrPoint), kColor_GrVertexAttribBinding},
     {kVec2f_GrVertexAttribType,  sizeof(GrPoint)+sizeof(GrColor),
                                                   kLocalCoord_GrVertexAttribBinding},
 };
 extern const GrVertexAttrib kRectPosUVAttribs[] = {
     {kVec2f_GrVertexAttribType,  0,              kPosition_GrVertexAttribBinding},
     {kVec2f_GrVertexAttribType, sizeof(GrPoint), kLocalCoord_GrVertexAttribBinding},
 };
 static void set_vertex_attributes(GrDrawState* drawState,
                                   bool hasColor, bool hasUVs,
                                   int* colorOffset, int* localOffset) {
     *colorOffset = -1;
     *localOffset = -1;
     // Using per-vertex colors allows batching across colors. (A lot of rects in a row differing
     // only in color is a common occurrence in tables). However, having per-vertex colors disables
     // blending optimizations because we don't know if the color will be solid or not. These
     // optimizations help determine whether coverage and color can be blended correctly when
     // dual-source blending isn't available. This comes into play when there is coverage. If colors
     // were a stage it could take a hint that every vertex's color will be opaque.
     if (hasColor && hasUVs) {
         *colorOffset = sizeof(GrPoint);
         *localOffset = sizeof(GrPoint) + sizeof(GrColor);
         drawState->setVertexAttribs<kRectPosColorUVAttribs>(3);
     } else if (hasColor) {
         *colorOffset = sizeof(GrPoint);
         drawState->setVertexAttribs<kRectPosColorUVAttribs>(2);
     } else if (hasUVs) {
         *localOffset = sizeof(GrPoint);
         drawState->setVertexAttribs<kRectPosUVAttribs>(2);
     } else {
         drawState->setVertexAttribs<kRectPosUVAttribs>(1);
     }
 }
 };
 void GrInOrderDrawBuffer::onDrawRect(const SkRect& rect,
                                      const SkMatrix* matrix,
                                      const SkRect* localRect,
                                      const SkMatrix* localMatrix) {
     GrDrawState::AutoColorRestore acr;
     GrDrawState* drawState = this->drawState();
     GrColor color = drawState->getColor();
     int colorOffset, localOffset;
     set_vertex_attributes(drawState,
                    this->caps()->dualSourceBlendingSupport() || drawState->hasSolidCoverage(),
                    NULL != localRect,
                    &colorOffset, &localOffset);
     if (colorOffset >= 0) {
         // We set the draw state's color to white here. This is done so that any batching performed
         // in our subclass's onDraw() won't get a false from GrDrawState::op== due to a color
         // mismatch. TODO: Once vertex layout is owned by GrDrawState it should skip comparing the
         // constant color in its op== when the kColor layout bit is set and then we can remove
         // this.
         acr.set(drawState, 0xFFFFFFFF);
     }
     AutoReleaseGeometry geo(this, 4, 0);
     if (!geo.succeeded()) {
         GrPrintf("Failed to get space for vertices!\n");
         return;
     }
     // Go to device coords to allow batching across matrix changes
     SkMatrix combinedMatrix;
     if (NULL != matrix) {
         combinedMatrix = *matrix;
     } else {
         combinedMatrix.reset();
     }
     combinedMatrix.postConcat(drawState->getViewMatrix());
     // When the caller has provided an explicit source rect for a stage then we don't want to
     // modify that stage's matrix. Otherwise if the effect is generating its source rect from
     // the vertex positions then we have to account for the view matrix change.
     GrDrawState::AutoViewMatrixRestore avmr;
     if (!avmr.setIdentity(drawState)) {
         return;
     }
     size_t vsize = drawState->getVertexSize();
     geo.positions()->setRectFan(rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, vsize);
     combinedMatrix.mapPointsWithStride(geo.positions(), vsize, 4);
     SkRect devBounds;
     // since we already computed the dev verts, set the bounds hint. This will help us avoid
     // unnecessary clipping in our onDraw().
     get_vertex_bounds(geo.vertices(), vsize, 4, &devBounds);
     if (localOffset >= 0) {
         GrPoint* coords = GrTCast<GrPoint*>(GrTCast<intptr_t>(geo.vertices()) + localOffset);
         coords->setRectFan(localRect->fLeft, localRect->fTop,
                            localRect->fRight, localRect->fBottom,
                             vsize);
         if (NULL != localMatrix) {
             localMatrix->mapPointsWithStride(coords, vsize, 4);
         }
     }
     if (colorOffset >= 0) {
         GrColor* vertColor = GrTCast<GrColor*>(GrTCast<intptr_t>(geo.vertices()) + colorOffset);
         for (int i = 0; i < 4; ++i) {
             *vertColor = color;
             vertColor = (GrColor*) ((intptr_t) vertColor + vsize);
         }
     }
     this->setIndexSourceToBuffer(this->getContext()->getQuadIndexBuffer());
     this->drawIndexedInstances(kTriangles_GrPrimitiveType, 1, 4, 6, &devBounds);
     // to ensure that stashing the drawState ptr is valid
     SkASSERT(this->drawState() == drawState);
 }
 bool GrInOrderDrawBuffer::quickInsideClip(const SkRect& devBounds) {
     if (!this->getDrawState().isClipState()) {
         return true;
     }
     if (kUnknown_ClipProxyState == fClipProxyState) {
         SkIRect rect;
         bool iior;
         this->getClip()->getConservativeBounds(this->getDrawState().getRenderTarget(), &rect, &iior);
         if (iior) {
             // The clip is a rect. We will remember that in fProxyClip. It is common for an edge (or
             // all edges) of the clip to be at the edge of the RT. However, we get that clipping for
             // free via the viewport. We don't want to think that clipping must be enabled in this
             // case. So we extend the clip outward from the edge to avoid these false negatives.
             fClipProxyState = kValid_ClipProxyState;
             fClipProxy = SkRect::Make(rect);
             if (fClipProxy.fLeft <= 0) {
                 fClipProxy.fLeft = SK_ScalarMin;
             }
             if (fClipProxy.fTop <= 0) {
                 fClipProxy.fTop = SK_ScalarMin;
             }
             if (fClipProxy.fRight >= this->getDrawState().getRenderTarget()->width()) {
                 fClipProxy.fRight = SK_ScalarMax;
             }
             if (fClipProxy.fBottom >= this->getDrawState().getRenderTarget()->height()) {
                 fClipProxy.fBottom = SK_ScalarMax;
             }
         } else {
             fClipProxyState = kInvalid_ClipProxyState;
         }
     }
     if (kValid_ClipProxyState == fClipProxyState) {
         return fClipProxy.contains(devBounds);
     }
     SkPoint originOffset = {SkIntToScalar(this->getClip()->fOrigin.fX),
                             SkIntToScalar(this->getClip()->fOrigin.fY)};
     SkRect clipSpaceBounds = devBounds;
     clipSpaceBounds.offset(originOffset);
     return this->getClip()->fClipStack->quickContains(clipSpaceBounds);
 }
 int GrInOrderDrawBuffer::concatInstancedDraw(const DrawInfo& info) {
     SkASSERT(info.isInstanced());
     const GeometrySrcState& geomSrc = this->getGeomSrc();
     const GrDrawState& drawState = this->getDrawState();
     // we only attempt to concat the case when reserved verts are used with a client-specified index
     // buffer. To make this work with client-specified VBs we'd need to know if the VB was updated
     // between draws.
     if (kReserved_GeometrySrcType != geomSrc.fVertexSrc ||
         kBuffer_GeometrySrcType != geomSrc.fIndexSrc) {
         return 0;
     }
     // Check if there is a draw info that is compatible that uses the same VB from the pool and
     // the same IB
     if (kDraw_Cmd != fCmds.back()) {
         return 0;
     }
     DrawRecord* draw = &fDraws.back();
     GeometryPoolState& poolState = fGeoPoolStateStack.back();
     const GrVertexBuffer* vertexBuffer = poolState.fPoolVertexBuffer;
     if (!draw->isInstanced() ||
         draw->verticesPerInstance() != info.verticesPerInstance() ||
         draw->indicesPerInstance() != info.indicesPerInstance() ||
         draw->fVertexBuffer != vertexBuffer ||
         draw->fIndexBuffer != geomSrc.fIndexBuffer) {
         return 0;
     }
     // info does not yet account for the offset from the start of the pool's VB while the previous
     // draw record does.
     int adjustedStartVertex = poolState.fPoolStartVertex + info.startVertex();
     if (draw->startVertex() + draw->vertexCount() != adjustedStartVertex) {
         return 0;
     }
     SkASSERT(poolState.fPoolStartVertex == draw->startVertex() + draw->vertexCount());
     // how many instances can be concat'ed onto draw given the size of the index buffer
     int instancesToConcat = this->indexCountInCurrentSource() / info.indicesPerInstance();
     instancesToConcat -= draw->instanceCount();
     instancesToConcat = GrMin(instancesToConcat, info.instanceCount());
     // update the amount of reserved vertex data actually referenced in draws
     size_t vertexBytes = instancesToConcat * info.verticesPerInstance() *
                          drawState.getVertexSize();
     poolState.fUsedPoolVertexBytes = GrMax(poolState.fUsedPoolVertexBytes, vertexBytes);
     draw->adjustInstanceCount(instancesToConcat);
     return instancesToConcat;
 }
 class AutoClipReenable {
 public:
     AutoClipReenable() : fDrawState(NULL) {}
     ~AutoClipReenable() {
         if (NULL != fDrawState) {
             fDrawState->enableState(GrDrawState::kClip_StateBit);
         }
     }
     void set(GrDrawState* drawState) {
         if (drawState->isClipState()) {
             fDrawState = drawState;
             drawState->disableState(GrDrawState::kClip_StateBit);
         }
     }
 private:
     GrDrawState*    fDrawState;
 };
 void GrInOrderDrawBuffer::onDraw(const DrawInfo& info) {
     GeometryPoolState& poolState = fGeoPoolStateStack.back();
     const GrDrawState& drawState = this->getDrawState();
     AutoClipReenable acr;
     if (drawState.isClipState() &&
         NULL != info.getDevBounds() &&
         this->quickInsideClip(*info.getDevBounds())) {
         acr.set(this->drawState());
     }
     if (this->needsNewClip()) {
        this->recordClip();
     }
     if (this->needsNewState()) {
         this->recordState();
     }
     DrawRecord* draw;
     if (info.isInstanced()) {
         int instancesConcated = this->concatInstancedDraw(info);
         if (info.instanceCount() > instancesConcated) {
             draw = this->recordDraw(info);
             draw->adjustInstanceCount(-instancesConcated);
         } else {
             return;
         }
     } else {
         draw = this->recordDraw(info);
     }
     switch (this->getGeomSrc().fVertexSrc) {
         case kBuffer_GeometrySrcType:
             draw->fVertexBuffer = this->getGeomSrc().fVertexBuffer;
             break;
         case kReserved_GeometrySrcType: // fallthrough
         case kArray_GeometrySrcType: {
             size_t vertexBytes = (info.vertexCount() + info.startVertex()) *
                                  drawState.getVertexSize();
             poolState.fUsedPoolVertexBytes = GrMax(poolState.fUsedPoolVertexBytes, vertexBytes);
             draw->fVertexBuffer = poolState.fPoolVertexBuffer;
             draw->adjustStartVertex(poolState.fPoolStartVertex);
             break;
         }
         default:
             GrCrash("unknown geom src type");
     }
     draw->fVertexBuffer->ref();
     if (info.isIndexed()) {
         switch (this->getGeomSrc().fIndexSrc) {
             case kBuffer_GeometrySrcType:
                 draw->fIndexBuffer = this->getGeomSrc().fIndexBuffer;
                 break;
             case kReserved_GeometrySrcType: // fallthrough
             case kArray_GeometrySrcType: {
                 size_t indexBytes = (info.indexCount() + info.startIndex()) * sizeof(uint16_t);
                 poolState.fUsedPoolIndexBytes = GrMax(poolState.fUsedPoolIndexBytes, indexBytes);
                 draw->fIndexBuffer = poolState.fPoolIndexBuffer;
                 draw->adjustStartIndex(poolState.fPoolStartIndex);
                 break;
             }
             default:
                 GrCrash("unknown geom src type");
         }
         draw->fIndexBuffer->ref();
     } else {
         draw->fIndexBuffer = NULL;
     }
 }
 GrInOrderDrawBuffer::StencilPath::StencilPath() {}
 GrInOrderDrawBuffer::DrawPath::DrawPath() {}
 void GrInOrderDrawBuffer::onStencilPath(const GrPath* path, SkPath::FillType fill) {
     if (this->needsNewClip()) {
         this->recordClip();
     }
     // Only compare the subset of GrDrawState relevant to path stenciling?
     if (this->needsNewState()) {
         this->recordState();
     }
     StencilPath* sp = this->recordStencilPath();
     sp->fPath.reset(path);
     path->ref();
     sp->fFill = fill;
 }
 void GrInOrderDrawBuffer::onDrawPath(const GrPath* path,
                                      SkPath::FillType fill, const GrDeviceCoordTexture* dstCopy) {
     if (this->needsNewClip()) {
         this->recordClip();
     }
     // TODO: Only compare the subset of GrDrawState relevant to path covering?
     if (this->needsNewState()) {
         this->recordState();
     }
     DrawPath* cp = this->recordDrawPath();
     cp->fPath.reset(path);
     path->ref();
     cp->fFill = fill;
     if (NULL != dstCopy) {
         cp->fDstCopy = *dstCopy;
     }
 }
 void GrInOrderDrawBuffer::clear(const SkIRect* rect, GrColor color,
                                 bool canIgnoreRect, GrRenderTarget* renderTarget) {
     SkIRect r;
     if (NULL == renderTarget) {
         renderTarget = this->drawState()->getRenderTarget();
         SkASSERT(NULL != renderTarget);
     }
     if (NULL == rect) {
         // We could do something smart and remove previous draws and clears to
         // the current render target. If we get that smart we have to make sure
         // those draws aren't read before this clear (render-to-texture).
         r.setLTRB(0, 0, renderTarget->width(), renderTarget->height());
         rect = &r;
     }
     Clear* clr = this->recordClear();
     clr->fColor = color;
     clr->fRect = *rect;
     clr->fCanIgnoreRect = canIgnoreRect;
     clr->fRenderTarget = renderTarget;
     renderTarget->ref();
 }
 void GrInOrderDrawBuffer::onInstantGpuTraceEvent(const char* marker) {
     // TODO: adds command to buffer
 }
 void GrInOrderDrawBuffer::onPushGpuTraceEvent(const char* marker) {
     // TODO: adds command to buffer
 }
 void GrInOrderDrawBuffer::onPopGpuTraceEvent() {
     // TODO: adds command to buffer
 }
 void GrInOrderDrawBuffer::reset() {
     SkASSERT(1 == fGeoPoolStateStack.count());
     this->resetVertexSource();
     this->resetIndexSource();
     int numDraws = fDraws.count();
     for (int d = 0; d < numDraws; ++d) {
         // we always have a VB, but not always an IB
         SkASSERT(NULL != fDraws[d].fVertexBuffer);
         fDraws[d].fVertexBuffer->unref();
         SkSafeUnref(fDraws[d].fIndexBuffer);
     }
     fCmds.reset();
     fDraws.reset();
     fStencilPaths.reset();
     fDrawPaths.reset();
     fStates.reset();
     fClears.reset();
     fVertexPool.reset();
     fIndexPool.reset();
     fClips.reset();
     fClipOrigins.reset();
     fCopySurfaces.reset();
     fClipSet = true;
 }
 void GrInOrderDrawBuffer::flush() {
     if (fFlushing) {
         return;
     }
     SkASSERT(kReserved_GeometrySrcType != this->getGeomSrc().fVertexSrc);
     SkASSERT(kReserved_GeometrySrcType != this->getGeomSrc().fIndexSrc);
     int numCmds = fCmds.count();
     if (0 == numCmds) {
         return;
     }
     GrAutoTRestore<bool> flushRestore(&fFlushing);
     fFlushing = true;
     fVertexPool.unlock();
     fIndexPool.unlock();
     GrDrawTarget::AutoClipRestore acr(fDstGpu);
     AutoGeometryAndStatePush agasp(fDstGpu, kPreserve_ASRInit);
     GrDrawState playbackState;
     GrDrawState* prevDrawState = fDstGpu->drawState();
     prevDrawState->ref();
     fDstGpu->setDrawState(&playbackState);
     GrClipData clipData;
     int currState       = 0;
     int currClip        = 0;
     int currClear       = 0;
     int currDraw        = 0;
     int currStencilPath = 0;
     int currDrawPath    = 0;
     int currCopySurface = 0;
     for (int c = 0; c < numCmds; ++c) {
         switch (fCmds[c]) {
             case kDraw_Cmd: {
                 const DrawRecord& draw = fDraws[currDraw];
                 fDstGpu->setVertexSourceToBuffer(draw.fVertexBuffer);
                 if (draw.isIndexed()) {
                     fDstGpu->setIndexSourceToBuffer(draw.fIndexBuffer);
                 }
                 fDstGpu->executeDraw(draw);
                 ++currDraw;
                 break;
             }
             case kStencilPath_Cmd: {
                 const StencilPath& sp = fStencilPaths[currStencilPath];
                 fDstGpu->stencilPath(sp.fPath.get(), sp.fFill);
                 ++currStencilPath;
                 break;
             }
             case kDrawPath_Cmd: {
                 const DrawPath& cp = fDrawPaths[currDrawPath];
                 fDstGpu->executeDrawPath(cp.fPath.get(), cp.fFill,
                                          NULL != cp.fDstCopy.texture() ? &cp.fDstCopy : NULL);
                 ++currDrawPath;
                 break;
             }
             case kSetState_Cmd:
                 fStates[currState].restoreTo(&playbackState);
                 ++currState;
                 break;
             case kSetClip_Cmd:
                 clipData.fClipStack = &fClips[currClip];
                 clipData.fOrigin = fClipOrigins[currClip];
                 fDstGpu->setClip(&clipData);
                 ++currClip;
                 break;
             case kClear_Cmd:
                 fDstGpu->clear(&fClears[currClear].fRect,
                                fClears[currClear].fColor,
                                fClears[currClear].fCanIgnoreRect,
                                fClears[currClear].fRenderTarget);
                 ++currClear;
                 break;
             case kCopySurface_Cmd:
                 fDstGpu->copySurface(fCopySurfaces[currCopySurface].fDst.get(),
                                      fCopySurfaces[currCopySurface].fSrc.get(),
                                      fCopySurfaces[currCopySurface].fSrcRect,
                                      fCopySurfaces[currCopySurface].fDstPoint);
                 ++currCopySurface;
                 break;
         }
     }
     // we should have consumed all the states, clips, etc.
     SkASSERT(fStates.count() == currState);
     SkASSERT(fClips.count() == currClip);
     SkASSERT(fClipOrigins.count() == currClip);
     SkASSERT(fClears.count() == currClear);
     SkASSERT(fDraws.count()  == currDraw);
     SkASSERT(fCopySurfaces.count() == currCopySurface);
     fDstGpu->setDrawState(prevDrawState);
     prevDrawState->unref();
     this->reset();
     ++fDrawID;
 }
 bool GrInOrderDrawBuffer::onCopySurface(GrSurface* dst,
                                         GrSurface* src,
                                         const SkIRect& srcRect,
                                         const SkIPoint& dstPoint) {
     if (fDstGpu->canCopySurface(dst, src, srcRect, dstPoint)) {
         CopySurface* cs = this->recordCopySurface();
         cs->fDst.reset(SkRef(dst));
         cs->fSrc.reset(SkRef(src));
         cs->fSrcRect = srcRect;
         cs->fDstPoint = dstPoint;
         return true;
     } else {
         return false;
     }
 }
 bool GrInOrderDrawBuffer::onCanCopySurface(GrSurface* dst,
                                            GrSurface* src,
                                            const SkIRect& srcRect,
                                            const SkIPoint& dstPoint) {
     return fDstGpu->canCopySurface(dst, src, srcRect, dstPoint);
 }
 void GrInOrderDrawBuffer::initCopySurfaceDstDesc(const GrSurface* src, GrTextureDesc* desc) {
     fDstGpu->initCopySurfaceDstDesc(src, desc);
 }
 void GrInOrderDrawBuffer::willReserveVertexAndIndexSpace(int vertexCount,
                                                          int indexCount) {
     // We use geometryHints() to know whether to flush the draw buffer. We
     // can't flush if we are inside an unbalanced pushGeometrySource.
     // Moreover, flushing blows away vertex and index data that was
     // previously reserved. So if the vertex or index data is pulled from
     // reserved space and won't be released by this request then we can't
     // flush.
     bool insideGeoPush = fGeoPoolStateStack.count() > 1;
     bool unreleasedVertexSpace =
         !vertexCount &&
         kReserved_GeometrySrcType == this->getGeomSrc().fVertexSrc;
     bool unreleasedIndexSpace =
         !indexCount &&
         kReserved_GeometrySrcType == this->getGeomSrc().fIndexSrc;
     // we don't want to finalize any reserved geom on the target since
     // we don't know that the client has finished writing to it.
     bool targetHasReservedGeom = fDstGpu->hasReservedVerticesOrIndices();
     int vcount = vertexCount;
     int icount = indexCount;
     if (!insideGeoPush &&
         !unreleasedVertexSpace &&
         !unreleasedIndexSpace &&
         !targetHasReservedGeom &&
         this->geometryHints(&vcount, &icount)) {
         this->flush();
     }
 }
 bool GrInOrderDrawBuffer::geometryHints(int* vertexCount,
                                         int* indexCount) const {
     // we will recommend a flush if the data could fit in a single
     // preallocated buffer but none are left and it can't fit
     // in the current buffer (which may not be prealloced).
     bool flush = false;
     if (NULL != indexCount) {
         int32_t currIndices = fIndexPool.currentBufferIndices();
         if (*indexCount > currIndices &&
             (!fIndexPool.preallocatedBuffersRemaining() &&
              *indexCount <= fIndexPool.preallocatedBufferIndices())) {
             flush = true;
         }
         *indexCount = currIndices;
     }
     if (NULL != vertexCount) {
         size_t vertexSize = this->getDrawState().getVertexSize();
         int32_t currVertices = fVertexPool.currentBufferVertices(vertexSize);
         if (*vertexCount > currVertices &&
             (!fVertexPool.preallocatedBuffersRemaining() &&
              *vertexCount <= fVertexPool.preallocatedBufferVertices(vertexSize))) {
             flush = true;
         }
         *vertexCount = currVertices;
     }
     return flush;
 }
 bool GrInOrderDrawBuffer::onReserveVertexSpace(size_t vertexSize,
                                                int vertexCount,
                                                void** vertices) {
     GeometryPoolState& poolState = fGeoPoolStateStack.back();
     SkASSERT(vertexCount > 0);
     SkASSERT(NULL != vertices);
     SkASSERT(0 == poolState.fUsedPoolVertexBytes);
     *vertices = fVertexPool.makeSpace(vertexSize,
                                       vertexCount,
                                       &poolState.fPoolVertexBuffer,
                                       &poolState.fPoolStartVertex);
     return NULL != *vertices;
 }
 bool GrInOrderDrawBuffer::onReserveIndexSpace(int indexCount, void** indices) {
     GeometryPoolState& poolState = fGeoPoolStateStack.back();
     SkASSERT(indexCount > 0);
     SkASSERT(NULL != indices);
     SkASSERT(0 == poolState.fUsedPoolIndexBytes);
     *indices = fIndexPool.makeSpace(indexCount,
                                     &poolState.fPoolIndexBuffer,
                                     &poolState.fPoolStartIndex);
     return NULL != *indices;
 }
 void GrInOrderDrawBuffer::releaseReservedVertexSpace() {
     GeometryPoolState& poolState = fGeoPoolStateStack.back();
     const GeometrySrcState& geoSrc = this->getGeomSrc();
     // If we get a release vertex space call then our current source should either be reserved
     // or array (which we copied into reserved space).
     SkASSERT(kReserved_GeometrySrcType == geoSrc.fVertexSrc ||
              kArray_GeometrySrcType == geoSrc.fVertexSrc);
     // When the caller reserved vertex buffer space we gave it back a pointer
     // provided by the vertex buffer pool. At each draw we tracked the largest
     // offset into the pool's pointer that was referenced. Now we return to the
     // pool any portion at the tail of the allocation that no draw referenced.
     size_t reservedVertexBytes = geoSrc.fVertexSize * geoSrc.fVertexCount;
     fVertexPool.putBack(reservedVertexBytes -
                         poolState.fUsedPoolVertexBytes);
     poolState.fUsedPoolVertexBytes = 0;
     poolState.fPoolVertexBuffer = NULL;
     poolState.fPoolStartVertex = 0;
 }
 void GrInOrderDrawBuffer::releaseReservedIndexSpace() {
     GeometryPoolState& poolState = fGeoPoolStateStack.back();
     const GeometrySrcState& geoSrc = this->getGeomSrc();
     // If we get a release index space call then our current source should either be reserved
     // or array (which we copied into reserved space).
     SkASSERT(kReserved_GeometrySrcType == geoSrc.fIndexSrc ||
              kArray_GeometrySrcType == geoSrc.fIndexSrc);
     // Similar to releaseReservedVertexSpace we return any unused portion at
     // the tail
     size_t reservedIndexBytes = sizeof(uint16_t) * geoSrc.fIndexCount;
     fIndexPool.putBack(reservedIndexBytes - poolState.fUsedPoolIndexBytes);
     poolState.fUsedPoolIndexBytes = 0;
     poolState.fPoolIndexBuffer = NULL;
     poolState.fPoolStartIndex = 0;
 }
 void GrInOrderDrawBuffer::onSetVertexSourceToArray(const void* vertexArray,
                                                    int vertexCount) {
     GeometryPoolState& poolState = fGeoPoolStateStack.back();
     SkASSERT(0 == poolState.fUsedPoolVertexBytes);
 #ifdef SK_DEBUG
     bool success =
 #endif
     fVertexPool.appendVertices(this->getVertexSize(),
                                vertexCount,
                                vertexArray,
                                &poolState.fPoolVertexBuffer,
                                &poolState.fPoolStartVertex);
     GR_DEBUGASSERT(success);
 }
 void GrInOrderDrawBuffer::onSetIndexSourceToArray(const void* indexArray,
                                                   int indexCount) {
     GeometryPoolState& poolState = fGeoPoolStateStack.back();
     SkASSERT(0 == poolState.fUsedPoolIndexBytes);
 #ifdef SK_DEBUG
     bool success =
 #endif
     fIndexPool.appendIndices(indexCount,
                              indexArray,
                              &poolState.fPoolIndexBuffer,
                              &poolState.fPoolStartIndex);
     GR_DEBUGASSERT(success);
 }
 void GrInOrderDrawBuffer::releaseVertexArray() {
     // When the client provides an array as the vertex source we handled it
     // by copying their array into reserved space.
     this->GrInOrderDrawBuffer::releaseReservedVertexSpace();
 }
 void GrInOrderDrawBuffer::releaseIndexArray() {
     // When the client provides an array as the index source we handled it
     // by copying their array into reserved space.
     this->GrInOrderDrawBuffer::releaseReservedIndexSpace();
 }
 void GrInOrderDrawBuffer::geometrySourceWillPush() {
     GeometryPoolState& poolState = fGeoPoolStateStack.push_back();
     poolState.fUsedPoolVertexBytes = 0;
     poolState.fUsedPoolIndexBytes = 0;
 #ifdef SK_DEBUG
     poolState.fPoolVertexBuffer = (GrVertexBuffer*)~0;
     poolState.fPoolStartVertex = ~0;
     poolState.fPoolIndexBuffer = (GrIndexBuffer*)~0;
     poolState.fPoolStartIndex = ~0;
 #endif
 }
 void GrInOrderDrawBuffer::geometrySourceWillPop(
                                         const GeometrySrcState& restoredState) {
     SkASSERT(fGeoPoolStateStack.count() > 1);
     fGeoPoolStateStack.pop_back();
     GeometryPoolState& poolState = fGeoPoolStateStack.back();
     // we have to assume that any slack we had in our vertex/index data
     // is now unreleasable because data may have been appended later in the
     // pool.
     if (kReserved_GeometrySrcType == restoredState.fVertexSrc ||
         kArray_GeometrySrcType == restoredState.fVertexSrc) {
         poolState.fUsedPoolVertexBytes = restoredState.fVertexSize * restoredState.fVertexCount;
     }
     if (kReserved_GeometrySrcType == restoredState.fIndexSrc ||
         kArray_GeometrySrcType == restoredState.fIndexSrc) {
         poolState.fUsedPoolIndexBytes = sizeof(uint16_t) *
                                          restoredState.fIndexCount;
     }
 }
 bool GrInOrderDrawBuffer::needsNewState() const {
     return fStates.empty() || !fStates.back().isEqual(this->getDrawState());
 }
 bool GrInOrderDrawBuffer::needsNewClip() const {
     SkASSERT(fClips.count() == fClipOrigins.count());
     if (this->getDrawState().isClipState()) {
        if (fClipSet &&
            (fClips.empty() ||
             fClips.back() != *this->getClip()->fClipStack ||
             fClipOrigins.back() != this->getClip()->fOrigin)) {
            return true;
        }
     }
     return false;
 }
 void GrInOrderDrawBuffer::recordClip() {
     fClips.push_back() = *this->getClip()->fClipStack;
     fClipOrigins.push_back() = this->getClip()->fOrigin;
     fClipSet = false;
     fCmds.push_back(kSetClip_Cmd);
 }
 void GrInOrderDrawBuffer::recordState() {
     fStates.push_back().saveFrom(this->getDrawState());
     fCmds.push_back(kSetState_Cmd);
 }
 GrInOrderDrawBuffer::DrawRecord* GrInOrderDrawBuffer::recordDraw(const DrawInfo& info) {
     fCmds.push_back(kDraw_Cmd);
     return &fDraws.push_back(info);
 }
 GrInOrderDrawBuffer::StencilPath* GrInOrderDrawBuffer::recordStencilPath() {
     fCmds.push_back(kStencilPath_Cmd);
     return &fStencilPaths.push_back();
 }
 GrInOrderDrawBuffer::DrawPath* GrInOrderDrawBuffer::recordDrawPath() {
     fCmds.push_back(kDrawPath_Cmd);
     return &fDrawPaths.push_back();
 }
 GrInOrderDrawBuffer::Clear* GrInOrderDrawBuffer::recordClear() {
     fCmds.push_back(kClear_Cmd);
     return &fClears.push_back();
 }
 GrInOrderDrawBuffer::CopySurface* GrInOrderDrawBuffer::recordCopySurface() {
     fCmds.push_back(kCopySurface_Cmd);
     return &fCopySurfaces.push_back();
 }
 void GrInOrderDrawBuffer::clipWillBeSet(const GrClipData* newClipData) {
     INHERITED::clipWillBeSet(newClipData);
     fClipSet = true;
     fClipProxyState = kUnknown_ClipProxyState;
 }

The Tor Browser / annotate

gfx/skia/trunk/src/gpu/GrInOrderDrawBuffer.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/gpu/GrInOrderDrawBuffer.cpp