Line data    Source code

       1             : /*
       2             :  * Copyright 2014 Google Inc.
       3             :  *
       4             :  * Use of this source code is governed by a BSD-style license that can be
       5             :  * found in the LICENSE file.
       6             :  */
       7             : 
       8             : #include "GrGLPathRange.h"
       9             : #include "GrGLPath.h"
      10             : #include "GrGLPathRendering.h"
      11             : #include "GrGLGpu.h"
      12             : 
      13           0 : GrGLPathRange::GrGLPathRange(GrGLGpu* gpu, PathGenerator* pathGenerator, const GrStyle& style)
      14             :     : INHERITED(gpu, pathGenerator),
      15             :       fStyle(style),
      16           0 :       fBasePathID(gpu->glPathRendering()->genPaths(this->getNumPaths())),
      17           0 :       fGpuMemorySize(0) {
      18           0 :     this->init();
      19           0 :     this->registerWithCache(SkBudgeted::kYes);
      20           0 : }
      21             : 
      22           0 : GrGLPathRange::GrGLPathRange(GrGLGpu* gpu,
      23             :                              GrGLuint basePathID,
      24             :                              int numPaths,
      25             :                              size_t gpuMemorySize,
      26           0 :                              const GrStyle& style)
      27             :     : INHERITED(gpu, numPaths),
      28             :       fStyle(style),
      29             :       fBasePathID(basePathID),
      30           0 :       fGpuMemorySize(gpuMemorySize) {
      31           0 :     this->init();
      32           0 :     this->registerWithCache(SkBudgeted::kYes);
      33           0 : }
      34             : 
      35           0 : void GrGLPathRange::init() {
      36           0 :     const SkStrokeRec& stroke = fStyle.strokeRec();
      37             :     // Must force fill:
      38             :     // * dashing: NVPR stroke dashing is different to Skia.
      39             :     // * end caps: NVPR stroking degenerate contours with end caps is different to Skia.
      40           0 :     bool forceFill = fStyle.pathEffect() ||
      41           0 :             (stroke.needToApply() && stroke.getCap() != SkPaint::kButt_Cap);
      42             : 
      43           0 :     if (forceFill) {
      44           0 :         fShouldStroke = false;
      45           0 :         fShouldFill = true;
      46             :     } else {
      47           0 :         fShouldStroke = stroke.needToApply();
      48           0 :         fShouldFill = stroke.isFillStyle() ||
      49           0 :                 stroke.getStyle() == SkStrokeRec::kStrokeAndFill_Style;
      50             :     }
      51           0 : }
      52             : 
      53           0 : void GrGLPathRange::onInitPath(int index, const SkPath& origSkPath) const {
      54           0 :     GrGLGpu* gpu = static_cast<GrGLGpu*>(this->getGpu());
      55           0 :     if (nullptr == gpu) {
      56           0 :         return;
      57             :     }
      58             :     // Make sure the path at this index hasn't been initted already.
      59           0 :     SkDEBUGCODE(
      60             :         GrGLboolean isPath;
      61             :         GR_GL_CALL_RET(gpu->glInterface(), isPath, IsPath(fBasePathID + index)));
      62           0 :     SkASSERT(GR_GL_FALSE == isPath);
      63             : 
      64           0 :     if (origSkPath.isEmpty()) {
      65           0 :         GrGLPath::InitPathObjectEmptyPath(gpu, fBasePathID + index);
      66           0 :     } else if (fShouldStroke) {
      67           0 :         GrGLPath::InitPathObjectPathData(gpu, fBasePathID + index, origSkPath);
      68           0 :         GrGLPath::InitPathObjectStroke(gpu, fBasePathID + index, fStyle.strokeRec());
      69             :     } else {
      70           0 :         const SkPath* skPath = &origSkPath;
      71           0 :         SkTLazy<SkPath> tmpPath;
      72           0 :         if (!fStyle.isSimpleFill()) {
      73             :             SkStrokeRec::InitStyle fill;
      74             :             // The path effect must be applied to the path. However, if a path effect is present,
      75             :             // we must convert all the paths to fills. The path effect application may leave
      76             :             // simple paths as strokes but converts other paths to fills.
      77             :             // Thus we must stroke the strokes here, so that all paths in the
      78             :             // path range are using the same style.
      79           0 :             if (!fStyle.applyToPath(tmpPath.init(), &fill, *skPath, SK_Scalar1)) {
      80           0 :                 return;
      81             :             }
      82             :             // We shouldn't have allowed hairlines or arbitrary path effect styles to get here
      83             :             // so after application we better have a filled path.
      84           0 :             SkASSERT(SkStrokeRec::kFill_InitStyle == fill);
      85           0 :             skPath = tmpPath.get();
      86             : 
      87             :         }
      88           0 :         GrGLPath::InitPathObjectPathData(gpu, fBasePathID + index, *skPath);
      89             :     }
      90             :     // TODO: Use a better approximation for the individual path sizes.
      91           0 :     fGpuMemorySize += 100;
      92             : }
      93             : 
      94           0 : void GrGLPathRange::onRelease() {
      95           0 :     SkASSERT(this->getGpu());
      96             : 
      97           0 :     if (0 != fBasePathID) {
      98           0 :         static_cast<GrGLGpu*>(this->getGpu())->glPathRendering()->deletePaths(fBasePathID,
      99           0 :                                                                               this->getNumPaths());
     100           0 :         fBasePathID = 0;
     101             :     }
     102             : 
     103           0 :     INHERITED::onRelease();
     104           0 : }
     105             : 
     106           0 : void GrGLPathRange::onAbandon() {
     107           0 :     fBasePathID = 0;
     108             : 
     109           0 :     INHERITED::onAbandon();
     110           0 : }