From 6599efffeef3168dfc68dca99c30454c5c23b859 Mon Sep 17 00:00:00 2001
From: senorblanco <senorblanco@chromium.org>
Date: Thu, 10 Mar 2016 08:38:45 -0800
Subject: GrTessellator: abstract vertex allocation into caller.

This abstracts all vertex allocation out of GrTessellator via a VertexBuffer interface. This removes all GPU-related calls from GrTessellator.

It also factors vertex drawing into GrTessellatingPathRenderer::drawVertices(), and makes tessellate() (now draw() also responsible for drawing. This means the cache hit case is clearer as an early-out,
and storing into cache is done in draw() as well.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1776003002

Review URL: https://codereview.chromium.org/1776003002
---
 src/gpu/GrTessellator.cpp | 37 +++++++------------------------------
 1 file changed, 7 insertions(+), 30 deletions(-)

(limited to 'src/gpu/GrTessellator.cpp')

diff --git a/src/gpu/GrTessellator.cpp b/src/gpu/GrTessellator.cpp
index a8fa79e560..f4195dfb03 100644
--- a/src/gpu/GrTessellator.cpp
+++ b/src/gpu/GrTessellator.cpp
@@ -7,17 +7,11 @@
 
 #include "GrTessellator.h"
 
-#include "GrBatchFlushState.h"
-#include "GrBatchTest.h"
-#include "GrDefaultGeoProcFactory.h"
 #include "GrPathUtils.h"
-#include "GrVertices.h"
-#include "GrResourceCache.h"
-#include "GrResourceProvider.h"
-#include "SkGeometry.h"
-#include "SkChunkAlloc.h"
 
-#include "batches/GrVertexBatch.h"
+#include "SkChunkAlloc.h"
+#include "SkGeometry.h"
+#include "SkPath.h"
 
 #include <stdio.h>
 
@@ -1370,8 +1364,7 @@ namespace GrTessellator {
 // Stage 6: Triangulate the monotone polygons into a vertex buffer.
 
 int PathToTriangles(const SkPath& path, SkScalar tolerance, const SkRect& clipBounds, 
-                    GrResourceProvider* resourceProvider, 
-                    SkAutoTUnref<GrVertexBuffer>& vertexBuffer, bool canMapVB, bool* isLinear) {
+                    VertexAllocator* vertexAllocator, bool* isLinear) {
     int contourCnt;
     int sizeEstimate;
     get_contour_count_and_size_estimate(path, tolerance, &contourCnt, &sizeEstimate);
@@ -1387,21 +1380,11 @@ int PathToTriangles(const SkPath& path, SkScalar tolerance, const SkRect& clipBo
         return 0;
     }
 
-    size_t size = count * sizeof(SkPoint);
-    if (!vertexBuffer.get() || vertexBuffer->gpuMemorySize() < size) {
-        vertexBuffer.reset(resourceProvider->createVertexBuffer(
-            size, GrResourceProvider::kStatic_BufferUsage, 0));
-    }
-    if (!vertexBuffer.get()) {
+    SkPoint* verts = vertexAllocator->lock(count);
+    if (!verts) {
         SkDebugf("Could not allocate vertices\n");
         return 0;
     }
-    SkPoint* verts;
-    if (canMapVB) {
-        verts = static_cast<SkPoint*>(vertexBuffer->map());
-    } else {
-        verts = new SkPoint[count];
-    }
     SkPoint* end = verts;
     for (Poly* poly = polys; poly; poly = poly->fNext) {
         if (apply_fill_type(fillType, poly->fWinding)) {
@@ -1411,13 +1394,7 @@ int PathToTriangles(const SkPath& path, SkScalar tolerance, const SkRect& clipBo
     int actualCount = static_cast<int>(end - verts);
     LOG("actual count: %d\n", actualCount);
     SkASSERT(actualCount <= count);
-    if (canMapVB) {
-        vertexBuffer->unmap();
-    } else {
-        vertexBuffer->updateData(verts, actualCount * sizeof(SkPoint));
-        delete[] verts;
-    }
-
+    vertexAllocator->unlock(actualCount);
     return actualCount;
 }
 
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