Merge "Implement functions for managing Graphite memory budget." into main

    return mContext->isDeviceLost();

}

void GraphiteGpuContext::setResourceCacheLimit(size_t maxResourceBytes) {

    // Graphite has a separate budget for its Context and its Recorder. For now the majority of

    // memory that Graphite will allocate will be on the Recorder and minimal amount on the Context.

    // The main allocations on the Context are MSAA buffers (not often, if ever used in

    // RenderEngine) and stencil buffers. However, both of these should be "memoryless" in Vulkan on

    // tiled GPUs, so they don't actually use GPU memory. However, in Vulkan there are scenarios

    // where Vulkan could end up using real memory for them. Skia will regularly query the device to

    // get the real memory usage and update the budgeted appropriately. Though for all real usage

    // patterns we don't expect to ever trigger the device to allocate real memory.

    //

    // Therefore, we set the full maxResourceBytes budget on the Recorder. However, in the rare

    // chance that the devcies does allocate real memory we don't want to immediately kill device

    // performance by constantly trashing allocations on the Context. Thus we set the Context's

    // budget to be 50% of the total budget to make sure we allow the MSAA or Stencil buffers to be

    // allocated in Skia and not immediately discarded. But even with this extra 50% budget, as

    // described above, this shouldn't result in actual GPU memory usage.

    //

    // TODO: We will need to revise this strategy for GLES which does not have the same memoryless

    // textures.

    // TODO: Work in Graphite has started to move a lot more of its scratch resources to be owned

    // by the Context and not on Recorders. This will mean most memory is actually owned by the

    // Context and thus the budgeting here will need to be updated.

    mContext->setMaxBudgetedBytes(maxResourceBytes / 2);

    mRecorder->setMaxBudgetedBytes(maxResourceBytes);

}

void GraphiteGpuContext::purgeUnlockedScratchResources() {

    mContext->freeGpuResources();

    mRecorder->freeGpuResources();

}

void GraphiteGpuContext::dumpMemoryStatistics(SkTraceMemoryDump* traceMemoryDump) const {

    mContext->dumpMemoryStatistics(traceMemoryDump);

    mRecorder->dumpMemoryStatistics(traceMemoryDump);

}

} // namespace android::renderengine::skia

    size_t getMaxRenderTargetSize() const override;

    size_t getMaxTextureSize() const override;

    bool isAbandonedOrDeviceLost() override;

    // No-op (large resources like textures, surfaces, images, etc. created by clients don't count

    // towards Graphite's internal caching budgets, so adjusting its limits based on display change

    // events should be unnecessary. Additionally, Graphite doesn't expose many cache tweaking

    // functions yet, as its design may evolve.)

    void setResourceCacheLimit(size_t maxResourceBytes) override{};

    // TODO: b/293371537 - Triple-check and validate that no cleanup is necessary when switching

    // contexts.

    // No-op (unnecessary during context switch for Graphite's client-budgeted memory model).

    void purgeUnlockedScratchResources() override{};

    void setResourceCacheLimit(size_t maxResourceBytes) override;

    void purgeUnlockedScratchResources() override;

    // No-op (only applicable to GL).

    void resetContextIfApplicable() override{};