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//
// Copyright 2016 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// BufferVk.h:
// Defines the class interface for BufferVk, implementing BufferImpl.
//
#ifndef LIBANGLE_RENDERER_VULKAN_BUFFERVK_H_
#define LIBANGLE_RENDERER_VULKAN_BUFFERVK_H_
#include "libANGLE/Buffer.h"
#include "libANGLE/Observer.h"
#include "libANGLE/renderer/BufferImpl.h"
#include "libANGLE/renderer/vulkan/vk_helpers.h"
namespace rx
{
class RendererVk;
// Conversion buffers hold translated index and vertex data.
struct ConversionBuffer
{
ConversionBuffer(RendererVk *renderer,
VkBufferUsageFlags usageFlags,
size_t initialSize,
size_t alignment,
bool hostVisible);
~ConversionBuffer();
ConversionBuffer(ConversionBuffer &&other);
// One state value determines if we need to re-stream vertex data.
bool dirty;
// One additional state value keeps the last allocation offset.
VkDeviceSize lastAllocationOffset;
// The conversion is stored in a dynamic buffer.
vk::DynamicBuffer data;
};
class BufferVk : public BufferImpl
{
public:
BufferVk(const gl::BufferState &state);
~BufferVk() override;
void destroy(const gl::Context *context) override;
angle::Result setData(const gl::Context *context,
gl::BufferBinding target,
const void *data,
size_t size,
gl::BufferUsage usage) override;
angle::Result setSubData(const gl::Context *context,
gl::BufferBinding target,
const void *data,
size_t size,
size_t offset) override;
angle::Result copySubData(const gl::Context *context,
BufferImpl *source,
GLintptr sourceOffset,
GLintptr destOffset,
GLsizeiptr size) override;
angle::Result map(const gl::Context *context, GLenum access, void **mapPtr) override;
angle::Result mapRange(const gl::Context *context,
size_t offset,
size_t length,
GLbitfield access,
void **mapPtr) override;
angle::Result unmap(const gl::Context *context, GLboolean *result) override;
angle::Result getIndexRange(const gl::Context *context,
gl::DrawElementsType type,
size_t offset,
size_t count,
bool primitiveRestartEnabled,
gl::IndexRange *outRange) override;
GLint64 getSize() const { return mState.getSize(); }
void onDataChanged() override;
const vk::BufferHelper &getBuffer() const
{
ASSERT(isBufferValid());
return *mBuffer;
}
vk::BufferHelper &getBuffer()
{
ASSERT(isBufferValid());
return *mBuffer;
}
bool isBufferValid() const { return mBuffer && mBuffer->valid(); }
angle::Result mapImpl(ContextVk *contextVk, void **mapPtr);
angle::Result mapRangeImpl(ContextVk *contextVk,
VkDeviceSize offset,
VkDeviceSize length,
GLbitfield access,
void **mapPtr);
angle::Result unmapImpl(ContextVk *contextVk);
// Calls copyBuffer internally.
angle::Result copyToBufferImpl(ContextVk *contextVk,
vk::BufferHelper *destBuffer,
uint32_t copyCount,
const VkBufferCopy *copies);
ConversionBuffer *getVertexConversionBuffer(RendererVk *renderer,
angle::FormatID formatID,
GLuint stride,
size_t offset,
bool hostVisible);
private:
void initializeStagingBuffer(ContextVk *contextVk, gl::BufferBinding target, size_t size);
angle::Result initializeShadowBuffer(ContextVk *contextVk,
gl::BufferBinding target,
size_t size);
ANGLE_INLINE uint8_t *getShadowBuffer(size_t offset)
{
return (mShadowBuffer.getCurrentBuffer() + offset);
}
ANGLE_INLINE const uint8_t *getShadowBuffer(size_t offset) const
{
return (mShadowBuffer.getCurrentBuffer() + offset);
}
void updateShadowBuffer(const uint8_t *data, size_t size, size_t offset);
angle::Result directUpdate(ContextVk *contextVk,
const uint8_t *data,
size_t size,
size_t offset);
angle::Result stagedUpdate(ContextVk *contextVk,
const uint8_t *data,
size_t size,
size_t offset);
angle::Result acquireAndUpdate(ContextVk *contextVk,
const uint8_t *data,
size_t size,
size_t offset);
angle::Result setDataImpl(ContextVk *contextVk,
const uint8_t *data,
size_t size,
size_t offset);
void release(ContextVk *context);
void markConversionBuffersDirty();
angle::Result acquireBufferHelper(ContextVk *contextVk,
size_t sizeInBytes,
vk::BufferHelper **bufferHelperOut);
struct VertexConversionBuffer : public ConversionBuffer
{
VertexConversionBuffer(RendererVk *renderer,
angle::FormatID formatIDIn,
GLuint strideIn,
size_t offsetIn,
bool hostVisible);
~VertexConversionBuffer();
VertexConversionBuffer(VertexConversionBuffer &&other);
// The conversion is identified by the triple of {format, stride, offset}.
angle::FormatID formatID;
GLuint stride;
size_t offset;
};
vk::BufferHelper *mBuffer;
// Pool of BufferHelpers for mBuffer to acquire from
vk::DynamicBuffer mBufferPool;
// All staging buffer support is provided by a DynamicBuffer.
vk::DynamicBuffer mStagingBuffer;
// For GPU-read only buffers glMap* latency is reduced by maintaining a copy
// of the buffer which is writeable only by the CPU. The contents are updated on all
// glData/glSubData/glCopy calls. With this, a glMap* call becomes a non-blocking
// operation by elimnating the need to wait on any recorded or in-flight GPU commands.
// We use DynamicShadowBuffer class to encapsulate all the bookeeping logic.
vk::DynamicShadowBuffer mShadowBuffer;
// A cache of converted vertex data.
std::vector<VertexConversionBuffer> mVertexConversionBuffers;
};
} // namespace rx
#endif // LIBANGLE_RENDERER_VULKAN_BUFFERVK_H_
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