GrEagerVertexAllocator.cpp

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/*
 * Copyright 2021 Google LLC
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
#include "src/gpu/ganesh/GrEagerVertexAllocator.h"
 
#include "src/gpu/ganesh/GrMeshDrawTarget.h"
 
//-------------------------------------------------------------------------------------------------
void* GrEagerDynamicVertexAllocator::lock(size_t stride, int eagerCount) {
    SkASSERT(!fLockCount);
    SkASSERT(eagerCount);
    if (void* data = fTarget->makeVertexSpace(stride, eagerCount, fVertexBuffer, fBaseVertex)) {
        fLockStride = stride;
        fLockCount = eagerCount;
        return data;
    }
    fVertexBuffer->reset();
    *fBaseVertex = 0;
    return nullptr;
}
 
void GrEagerDynamicVertexAllocator::unlock(int actualCount) {
    SkASSERT(fLockCount);
    SkASSERT(actualCount <= fLockCount);
    fTarget->putBackVertices(fLockCount - actualCount, fLockStride);
    if (!actualCount) {
        fVertexBuffer->reset();
        *fBaseVertex = 0;
    }
    fLockCount = 0;
}
 
//-------------------------------------------------------------------------------------------------
void* GrCpuVertexAllocator::lock(size_t stride, int eagerCount) {
    SkASSERT(!fLockStride && !fVertices && !fVertexData);
    SkASSERT(stride && eagerCount);
 
    fVertices = sk_malloc_throw(eagerCount * stride);
    fLockStride = stride;
 
    return fVertices;
}
 
void GrCpuVertexAllocator::unlock(int actualCount) {
    SkASSERT(fLockStride && fVertices && !fVertexData);
 
    fVertices = sk_realloc_throw(fVertices, actualCount * fLockStride);
 
    fVertexData = GrThreadSafeCache::MakeVertexData(fVertices, actualCount, fLockStride);
 
    fVertices = nullptr;
    fLockStride = 0;
}
 
sk_sp<GrThreadSafeCache::VertexData> GrCpuVertexAllocator::detachVertexData() {
    SkASSERT(!fLockStride && !fVertices && fVertexData);
 
    return std::move(fVertexData);
}