Calculate rough approximations for nvpr path sizes

src/gpu/gl/GrGLPath.cpp

 
 /*
  * 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 "GrGLPath.h"
 #include "GrGLPathRendering.h"
@@ skipping 63 matching lines @@
     GR_STATIC_ASSERT(0 == SkPaint::kButt_Cap);
     GR_STATIC_ASSERT(1 == SkPaint::kRound_Cap);
     GR_STATIC_ASSERT(2 == SkPaint::kSquare_Cap);
     GR_STATIC_ASSERT(SK_ARRAY_COUNT(gSkCapsToGrGLCaps) == SkPaint::kCapCount);
 }
 
 }
 
 static const bool kIsWrapped = false; // The constructor creates the GL path object.
 
-void GrGLPath::InitPathObject(GrGpuGL* gpu,
-                              GrGLuint pathID,
-                              const SkPath& skPath,
-                              const SkStrokeRec& stroke) {
+size_t GrGLPath::InitPathObject(GrGpuGL* gpu,
+                                GrGLuint pathID,
+                                const SkPath& skPath,
+                                const SkStrokeRec& stroke) {
     GrGLPathRendering* pr = gpu->pathRendering();
     SkSTArray<16, GrGLubyte, true> pathCommands;
     SkSTArray<16, SkPoint, true> pathPoints;
 
     int verbCnt = skPath.countVerbs();
     int pointCnt = skPath.countPoints();
     pathCommands.resize_back(verbCnt);
     pathPoints.resize_back(pointCnt);
 
     // TODO: Direct access to path points since we could pass them on directly.
@@ skipping 12 matching lines @@
     if (stroke.needToApply()) {
         SkASSERT(!stroke.isHairlineStyle());
         pr->pathParameterf(pathID, GR_GL_PATH_STROKE_WIDTH, SkScalarToFloat(stroke.getWidth()));
         pr->pathParameterf(pathID, GR_GL_PATH_MITER_LIMIT, SkScalarToFloat(stroke.getMiter()));
         GrGLenum join = join_to_gl_join(stroke.getJoin());
         pr->pathParameteri(pathID, GR_GL_PATH_JOIN_STYLE, join);
         GrGLenum cap = cap_to_gl_cap(stroke.getCap());
         pr->pathParameteri(pathID, GR_GL_PATH_INITIAL_END_CAP, cap);
         pr->pathParameteri(pathID, GR_GL_PATH_TERMINAL_END_CAP, cap);
     }
+
+    size_t approximateSize = 5 * (verbCnt + pointCnt);
+    if (SkStrokeRec::kStrokeAndFill_Style == stroke.getStyle()) {
+        // It will take approxoimately twice the memory if it has both fill *and* stroke.
+        approximateSize *= 2;
+    }
+    return approximateSize;
 }
 
 GrGLPath::GrGLPath(GrGpuGL* gpu, const SkPath& path, const SkStrokeRec& stroke)
     : INHERITED(gpu, kIsWrapped, path, stroke),
       fPathID(gpu->pathRendering()->genPaths(1)) {
     SkASSERT(!path.isEmpty());
 
-    InitPathObject(gpu, fPathID, fSkPath, stroke);
+    fGpuMemorySize = InitPathObject(gpu, fPathID, fSkPath, stroke);
 
     if (stroke.needToApply()) {
         // FIXME: try to account for stroking, without rasterizing the stroke.
         fBounds.outset(stroke.getWidth(), stroke.getWidth());
     }
 }
 
 GrGLPath::~GrGLPath() {
     this->release();
 }
 
 void GrGLPath::onRelease() {
     if (0 != fPathID && !this->isWrapped()) {
         static_cast<GrGpuGL*>(this->getGpu())->pathRendering()->deletePaths(fPathID, 1);
         fPathID = 0;
     }
 
     INHERITED::onRelease();
 }
 
 void GrGLPath::onAbandon() {
     fPathID = 0;
 
     INHERITED::onAbandon();
 }