Consolidate GPU buffer implementations

src/gpu/GrResourceProvider.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrResourceProvider.h"
 
+#include "GrBuffer.h"
 #include "GrGpu.h"
-#include "GrIndexBuffer.h"
 #include "GrPathRendering.h"
 #include "GrRenderTarget.h"
 #include "GrRenderTargetPriv.h"
 #include "GrResourceCache.h"
 #include "GrResourceKey.h"
 #include "GrStencilAttachment.h"
-#include "GrVertexBuffer.h"
 
 GR_DECLARE_STATIC_UNIQUE_KEY(gQuadIndexBufferKey);
 
 GrResourceProvider::GrResourceProvider(GrGpu* gpu, GrResourceCache* cache, GrSingleOwner* owner)
     : INHERITED(gpu, cache, owner) {
     GR_DEFINE_STATIC_UNIQUE_KEY(gQuadIndexBufferKey);
     fQuadIndexBufferKey = gQuadIndexBufferKey;
 }
 
-const GrIndexBuffer* GrResourceProvider::createInstancedIndexBuffer(const uint16_t* pattern,
-                                                                    int patternSize,
-                                                                    int reps,
-                                                                    int vertCount,
-                                                                    const GrUniqueKey& key) {
+const GrBuffer* GrResourceProvider::createInstancedIndexBuffer(const uint16_t* pattern,
+                                                               int patternSize,
+                                                               int reps,
+                                                               int vertCount,
+                                                               const GrUniqueKey& key) {
     size_t bufferSize = patternSize * reps * sizeof(uint16_t);
 
     // This is typically used in GrBatchs, so we assume kNoPendingIO.
-    GrIndexBuffer* buffer = this->createIndexBuffer(bufferSize, kStatic_BufferUsage,
-                                                    kNoPendingIO_Flag);
+    GrBuffer* buffer = this->createBuffer(kIndex_GrBufferType, bufferSize, kStatic_GrAccessPattern,
+                                          kNoPendingIO_Flag);
     if (!buffer) {
         return nullptr;
     }
     uint16_t* data = (uint16_t*) buffer->map();
     bool useTempData = (nullptr == data);
     if (useTempData) {
         data = new uint16_t[reps * patternSize];
     }
     for (int i = 0; i < reps; ++i) {
         int baseIdx = i * patternSize;
         uint16_t baseVert = (uint16_t)(i * vertCount);
         for (int j = 0; j < patternSize; ++j) {
             data[baseIdx+j] = baseVert + pattern[j];
         }
     }
     if (useTempData) {
         if (!buffer->updateData(data, bufferSize)) {
             buffer->unref();
             return nullptr;
         }
         delete[] data;
     } else {
         buffer->unmap();
     }
     this->assignUniqueKeyToResource(key, buffer);
     return buffer;
 }
 
-const GrIndexBuffer* GrResourceProvider::createQuadIndexBuffer() {
+const GrBuffer* GrResourceProvider::createQuadIndexBuffer() {
     static const int kMaxQuads = 1 << 12; // max possible: (1 << 14) - 1;
     GR_STATIC_ASSERT(4 * kMaxQuads <= 65535);
     static const uint16_t kPattern[] = { 0, 1, 2, 0, 2, 3 };
 
     return this->createInstancedIndexBuffer(kPattern, 6, kMaxQuads, 4, fQuadIndexBufferKey);
 }
 
 GrPath* GrResourceProvider::createPath(const SkPath& path, const GrStrokeInfo& stroke) {
     SkASSERT(this->gpu()->pathRendering());
     return this->gpu()->pathRendering()->createPath(path, stroke);
 }
 
 GrPathRange* GrResourceProvider::createPathRange(GrPathRange::PathGenerator* gen,
                                                  const GrStrokeInfo& stroke) {
     SkASSERT(this->gpu()->pathRendering());
     return this->gpu()->pathRendering()->createPathRange(gen, stroke);
 }
 
 GrPathRange* GrResourceProvider::createGlyphs(const SkTypeface* tf, const SkDescriptor* desc,
                                               const GrStrokeInfo& stroke) {
 
     SkASSERT(this->gpu()->pathRendering());
     return this->gpu()->pathRendering()->createGlyphs(tf, desc, stroke);
 }
 
-GrIndexBuffer* GrResourceProvider::createIndexBuffer(size_t size, BufferUsage usage,
-                                                     uint32_t flags) {
+GrBuffer* GrResourceProvider::createBuffer(GrBufferType type, size_t size,
+                                           GrAccessPattern accessPattern, uint32_t flags) {
     if (this->isAbandoned()) {
         return nullptr;
     }
 
-    bool noPendingIO = SkToBool(flags & kNoPendingIO_Flag);
-    bool dynamic = kDynamic_BufferUsage == usage;
-    if (dynamic) {
+    if (kDynamic_GrAccessPattern == accessPattern) {
         // bin by pow2 with a reasonable min
         static const uint32_t MIN_SIZE = 1 << 12;
         size = SkTMax(MIN_SIZE, GrNextPow2(SkToUInt(size)));
 
         GrScratchKey key;
-        GrIndexBuffer::ComputeScratchKey(size, true, &key);
+        GrBuffer::ComputeScratchKeyForDynamicBuffer(type, size, &key);
         uint32_t scratchFlags = 0;
-        if (noPendingIO) {
+        if (flags & kNoPendingIO_Flag) {
             scratchFlags = GrResourceCache::kRequireNoPendingIO_ScratchFlag;
         } else {
             scratchFlags = GrResourceCache::kPreferNoPendingIO_ScratchFlag;
         }
         GrGpuResource* resource = this->cache()->findAndRefScratchResource(key, size, scratchFlags);
         if (resource) {
-            return static_cast<GrIndexBuffer*>(resource);
+            return static_cast<GrBuffer*>(resource);
         }
     }
-    return this->gpu()->createIndexBuffer(size, dynamic);
-}
-
-GrVertexBuffer* GrResourceProvider::createVertexBuffer(size_t size, BufferUsage usage,
-                                                       uint32_t flags) {
-    if (this->isAbandoned()) {
-        return nullptr;
-    }
-
-    bool noPendingIO = SkToBool(flags & kNoPendingIO_Flag);
-    bool dynamic = kDynamic_BufferUsage == usage;
-    if (dynamic) {
-        // bin by pow2 with a reasonable min
-        static const uint32_t MIN_SIZE = 1 << 12;
-        size = SkTMax(MIN_SIZE, GrNextPow2(SkToUInt(size)));
-
-        GrScratchKey key;
-        GrVertexBuffer::ComputeScratchKey(size, true, &key);
-        uint32_t scratchFlags = 0;
-        if (noPendingIO) {
-            scratchFlags = GrResourceCache::kRequireNoPendingIO_ScratchFlag;
-        } else {
-            scratchFlags = GrResourceCache::kPreferNoPendingIO_ScratchFlag;
-        }
-        GrGpuResource* resource = this->cache()->findAndRefScratchResource(key, size, scratchFlags);
-        if (resource) {
-            return static_cast<GrVertexBuffer*>(resource);
-        }
-    }
-    return this->gpu()->createVertexBuffer(size, dynamic);
-}
-
-GrTransferBuffer* GrResourceProvider::createTransferBuffer(size_t size, TransferType type,
-                                                           uint32_t flags) {
-    if (this->isAbandoned()) {
-        return nullptr;
-    }
-
-    //bool noPendingIO = SkToBool(flags & kNoPendingIO_Flag);
-    return this->gpu()->createTransferBuffer(size, type);
+    return this->gpu()->createBuffer(type, size, accessPattern);
 }
 
 GrBatchAtlas* GrResourceProvider::createAtlas(GrPixelConfig config,
                                               int width, int height,
                                               int numPlotsX, int numPlotsY,
                                               GrBatchAtlas::EvictionFunc func, void* data) {
     GrSurfaceDesc desc;
     desc.fFlags = kNone_GrSurfaceFlags;
     desc.fWidth = width;
     desc.fHeight = height;
@@ skipping 60 matching lines @@
 }
 
 GrRenderTarget* GrResourceProvider::wrapBackendTextureAsRenderTarget(
         const GrBackendTextureDesc& desc, GrWrapOwnership ownership) {
     if (this->isAbandoned()) {
         return nullptr;
     }
     return this->gpu()->wrapBackendTextureAsRenderTarget(desc, ownership);
 }