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Rewrite host GPU abstraction

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- Don't have to repeat the same thing for 4 renderers.
 - Add native Metal renderer.
This commit is contained in:
Stenzek
2023-08-13 13:42:02 +10:00
parent bfa792ddbf
commit e3d9ba4c99
249 changed files with 28851 additions and 32222 deletions
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345
src/util/opengl_stream_buffer.cpp Normal file
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// SPDX-FileCopyrightText: 2019-2023 Connor McLaughlin <stenzek@gmail.com>
// SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)
#include "opengl_stream_buffer.h"
#include "common/align.h"
#include "common/assert.h"
#include <array>
#include <cstdio>
OpenGLStreamBuffer::OpenGLStreamBuffer(GLenum target, GLuint buffer_id, u32 size)
: m_target(target), m_buffer_id(buffer_id), m_size(size)
{
}
OpenGLStreamBuffer::~OpenGLStreamBuffer()
{
glDeleteBuffers(1, &m_buffer_id);
}
void OpenGLStreamBuffer::Bind()
{
glBindBuffer(m_target, m_buffer_id);
}
void OpenGLStreamBuffer::Unbind()
{
glBindBuffer(m_target, 0);
}
void OpenGLStreamBuffer::SetDebugName(const std::string_view& name)
{
#ifdef _DEBUG
if (glObjectLabel)
{
glObjectLabel(GL_BUFFER, GetGLBufferId(), static_cast<GLsizei>(name.length()),
static_cast<const GLchar*>(name.data()));
}
#endif
}
namespace {
// Uses glBufferSubData() to update. Preferred for drivers which don't support {ARB,EXT}_buffer_storage.
class BufferSubDataStreamBuffer final : public OpenGLStreamBuffer
{
public:
~BufferSubDataStreamBuffer() override { Common::AlignedFree(m_cpu_buffer); }
MappingResult Map(u32 alignment, u32 min_size) override
{
return MappingResult{static_cast<void*>(m_cpu_buffer), 0, 0, m_size / alignment};
}
u32 Unmap(u32 used_size) override
{
if (used_size == 0)
return 0;
glBindBuffer(m_target, m_buffer_id);
glBufferSubData(m_target, 0, used_size, m_cpu_buffer);
return 0;
}
u32 GetChunkSize() const override { return m_size; }
static std::unique_ptr<OpenGLStreamBuffer> Create(GLenum target, u32 size)
{
glGetError();
GLuint buffer_id;
glGenBuffers(1, &buffer_id);
glBindBuffer(target, buffer_id);
glBufferData(target, size, nullptr, GL_STREAM_DRAW);
GLenum err = glGetError();
if (err != GL_NO_ERROR)
{
glBindBuffer(target, 0);
glDeleteBuffers(1, &buffer_id);
return {};
}
return std::unique_ptr<OpenGLStreamBuffer>(new BufferSubDataStreamBuffer(target, buffer_id, size));
}
private:
BufferSubDataStreamBuffer(GLenum target, GLuint buffer_id, u32 size) : OpenGLStreamBuffer(target, buffer_id, size)
{
m_cpu_buffer = static_cast<u8*>(Common::AlignedMalloc(size, 32));
if (!m_cpu_buffer)
Panic("Failed to allocate CPU storage for GL buffer");
}
u8* m_cpu_buffer;
};
// Uses BufferData() to orphan the buffer after every update. Used on Mali where BufferSubData forces a sync.
class BufferDataStreamBuffer final : public OpenGLStreamBuffer
{
public:
~BufferDataStreamBuffer() override { Common::AlignedFree(m_cpu_buffer); }
MappingResult Map(u32 alignment, u32 min_size) override
{
return MappingResult{static_cast<void*>(m_cpu_buffer), 0, 0, m_size / alignment};
}
u32 Unmap(u32 used_size) override
{
if (used_size == 0)
return 0;
glBindBuffer(m_target, m_buffer_id);
glBufferData(m_target, used_size, m_cpu_buffer, GL_STREAM_DRAW);
return 0;
}
u32 GetChunkSize() const override { return m_size; }
static std::unique_ptr<OpenGLStreamBuffer> Create(GLenum target, u32 size)
{
glGetError();
GLuint buffer_id;
glGenBuffers(1, &buffer_id);
glBindBuffer(target, buffer_id);
glBufferData(target, size, nullptr, GL_STREAM_DRAW);
GLenum err = glGetError();
if (err != GL_NO_ERROR)
{
glBindBuffer(target, 0);
glDeleteBuffers(1, &buffer_id);
return {};
}
return std::unique_ptr<OpenGLStreamBuffer>(new BufferDataStreamBuffer(target, buffer_id, size));
}
private:
BufferDataStreamBuffer(GLenum target, GLuint buffer_id, u32 size) : OpenGLStreamBuffer(target, buffer_id, size)
{
m_cpu_buffer = static_cast<u8*>(Common::AlignedMalloc(size, 32));
if (!m_cpu_buffer)
Panic("Failed to allocate CPU storage for GL buffer");
}
u8* m_cpu_buffer;
};
// Base class for implementations which require syncing.
class SyncingStreamBuffer : public OpenGLStreamBuffer
{
public:
enum : u32
{
NUM_SYNC_POINTS = 16
};
virtual ~SyncingStreamBuffer() override
{
for (u32 i = m_available_block_index; i <= m_used_block_index; i++)
{
DebugAssert(m_sync_objects[i]);
glDeleteSync(m_sync_objects[i]);
}
}
protected:
SyncingStreamBuffer(GLenum target, GLuint buffer_id, u32 size)
: OpenGLStreamBuffer(target, buffer_id, size), m_bytes_per_block((size + (NUM_SYNC_POINTS)-1) / NUM_SYNC_POINTS)
{
}
ALWAYS_INLINE u32 GetSyncIndexForOffset(u32 offset) { return offset / m_bytes_per_block; }
ALWAYS_INLINE void AddSyncsForOffset(u32 offset)
{
const u32 end = GetSyncIndexForOffset(offset);
for (; m_used_block_index < end; m_used_block_index++)
{
DebugAssert(!m_sync_objects[m_used_block_index]);
m_sync_objects[m_used_block_index] = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
}
}
ALWAYS_INLINE void WaitForSync(GLsync& sync)
{
glClientWaitSync(sync, GL_SYNC_FLUSH_COMMANDS_BIT, GL_TIMEOUT_IGNORED);
glDeleteSync(sync);
sync = nullptr;
}
ALWAYS_INLINE void EnsureSyncsWaitedForOffset(u32 offset)
{
const u32 end = std::min<u32>(GetSyncIndexForOffset(offset) + 1, NUM_SYNC_POINTS);
for (; m_available_block_index < end; m_available_block_index++)
{
DebugAssert(m_sync_objects[m_available_block_index]);
WaitForSync(m_sync_objects[m_available_block_index]);
}
}
void AllocateSpace(u32 size)
{
// add sync objects for writes since the last allocation
AddSyncsForOffset(m_position);
// wait for sync objects for the space we want to use
EnsureSyncsWaitedForOffset(m_position + size);
// wrap-around?
if ((m_position + size) > m_size)
{
// current position ... buffer end
AddSyncsForOffset(m_size);
// rewind, and try again
m_position = 0;
// wait for the sync at the start of the buffer
WaitForSync(m_sync_objects[0]);
m_available_block_index = 1;
// and however much more we need to satisfy the allocation
EnsureSyncsWaitedForOffset(size);
m_used_block_index = 0;
}
}
u32 GetChunkSize() const override { return m_size / NUM_SYNC_POINTS; }
u32 m_position = 0;
u32 m_used_block_index = 0;
u32 m_available_block_index = NUM_SYNC_POINTS;
u32 m_bytes_per_block;
std::array<GLsync, NUM_SYNC_POINTS> m_sync_objects{};
};
class BufferStorageStreamBuffer : public SyncingStreamBuffer
{
public:
~BufferStorageStreamBuffer() override
{
glBindBuffer(m_target, m_buffer_id);
glUnmapBuffer(m_target);
glBindBuffer(m_target, 0);
}
MappingResult Map(u32 alignment, u32 min_size) override
{
if (m_position > 0)
m_position = Common::AlignUp(m_position, alignment);
AllocateSpace(min_size);
DebugAssert((m_position + min_size) <= (m_available_block_index * m_bytes_per_block));
const u32 free_space_in_block = ((m_available_block_index * m_bytes_per_block) - m_position);
return MappingResult{static_cast<void*>(m_mapped_ptr + m_position), m_position, m_position / alignment,
free_space_in_block / alignment};
}
u32 Unmap(u32 used_size) override
{
DebugAssert((m_position + used_size) <= m_size);
if (!m_coherent)
{
// TODO: shouldn't be needed anymore
Bind();
glFlushMappedBufferRange(m_target, m_position, used_size);
}
const u32 prev_position = m_position;
m_position += used_size;
return prev_position;
}
static std::unique_ptr<OpenGLStreamBuffer> Create(GLenum target, u32 size, bool coherent = true)
{
glGetError();
GLuint buffer_id;
glGenBuffers(1, &buffer_id);
glBindBuffer(target, buffer_id);
const u32 flags = GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT | (coherent ? GL_MAP_COHERENT_BIT : 0);
const u32 map_flags = GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT | (coherent ? 0 : GL_MAP_FLUSH_EXPLICIT_BIT);
if (GLAD_GL_VERSION_4_4 || GLAD_GL_ARB_buffer_storage)
glBufferStorage(target, size, nullptr, flags);
else if (GLAD_GL_EXT_buffer_storage)
glBufferStorageEXT(target, size, nullptr, flags);
GLenum err = glGetError();
if (err != GL_NO_ERROR)
{
glBindBuffer(target, 0);
glDeleteBuffers(1, &buffer_id);
return {};
}
u8* mapped_ptr = static_cast<u8*>(glMapBufferRange(target, 0, size, map_flags));
AssertMsg(mapped_ptr, "Persistent buffer was mapped");
return std::unique_ptr<OpenGLStreamBuffer>(
new BufferStorageStreamBuffer(target, buffer_id, size, mapped_ptr, coherent));
}
private:
BufferStorageStreamBuffer(GLenum target, GLuint buffer_id, u32 size, u8* mapped_ptr, bool coherent)
: SyncingStreamBuffer(target, buffer_id, size), m_mapped_ptr(mapped_ptr), m_coherent(coherent)
{
}
u8* m_mapped_ptr;
bool m_coherent;
};
} // namespace
std::unique_ptr<OpenGLStreamBuffer> OpenGLStreamBuffer::Create(GLenum target, u32 size)
{
std::unique_ptr<OpenGLStreamBuffer> buf;
if (GLAD_GL_VERSION_4_4 || GLAD_GL_ARB_buffer_storage || GLAD_GL_EXT_buffer_storage)
{
buf = BufferStorageStreamBuffer::Create(target, size);
if (buf)
return buf;
}
// BufferSubData is slower on all drivers except NVIDIA...
#if 0
const char* vendor = reinterpret_cast<const char*>(glGetString(GL_VENDOR));
if (std::strcmp(vendor, "ARM") == 0 || std::strcmp(vendor, "Qualcomm") == 0)
{
// Mali and Adreno drivers can't do sub-buffer tracking...
return BufferDataStreamBuffer::Create(target, size);
}
return BufferSubDataStreamBuffer::Create(target, size);
#else
return BufferDataStreamBuffer::Create(target, size);
#endif
}