mirror of https://github.com/PCSX2/pcsx2.git
347 lines
9.2 KiB
C++
347 lines
9.2 KiB
C++
/* PCSX2 - PS2 Emulator for PCs
|
|
* Copyright (C) 2002-2021 PCSX2 Dev Team
|
|
*
|
|
* PCSX2 is free software: you can redistribute it and/or modify it under the terms
|
|
* of the GNU Lesser General Public License as published by the Free Software Found-
|
|
* ation, either version 3 of the License, or (at your option) any later version.
|
|
*
|
|
* PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
|
|
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
|
|
* PURPOSE. See the GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with PCSX2.
|
|
* If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "StreamBuffer.h"
|
|
#include "common/Align.h"
|
|
#include "common/Assertions.h"
|
|
#include <array>
|
|
#include <cstring>
|
|
|
|
namespace GL
|
|
{
|
|
StreamBuffer::StreamBuffer(GLenum target, GLuint buffer_id, u32 size)
|
|
: m_target(target)
|
|
, m_buffer_id(buffer_id)
|
|
, m_size(size)
|
|
{
|
|
}
|
|
|
|
StreamBuffer::~StreamBuffer()
|
|
{
|
|
glDeleteBuffers(1, &m_buffer_id);
|
|
}
|
|
|
|
void StreamBuffer::Bind()
|
|
{
|
|
glBindBuffer(m_target, m_buffer_id);
|
|
}
|
|
|
|
void StreamBuffer::Unbind()
|
|
{
|
|
glBindBuffer(m_target, 0);
|
|
}
|
|
|
|
namespace detail
|
|
{
|
|
// Uses glBufferSubData() to update. Preferred for drivers which don't support {ARB,EXT}_buffer_storage.
|
|
class BufferSubDataStreamBuffer final : public StreamBuffer
|
|
{
|
|
public:
|
|
~BufferSubDataStreamBuffer() override = default;
|
|
|
|
MappingResult Map(u32 alignment, u32 min_size) override
|
|
{
|
|
return MappingResult{static_cast<void*>(m_cpu_buffer.data()), 0, 0, m_size / alignment};
|
|
}
|
|
|
|
void Unmap(u32 used_size) override
|
|
{
|
|
if (used_size == 0)
|
|
return;
|
|
|
|
glBindBuffer(m_target, m_buffer_id);
|
|
glBufferSubData(m_target, 0, used_size, m_cpu_buffer.data());
|
|
}
|
|
|
|
u32 GetChunkSize() const override
|
|
{
|
|
return m_size;
|
|
}
|
|
|
|
static std::unique_ptr<StreamBuffer> 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<StreamBuffer>(new BufferSubDataStreamBuffer(target, buffer_id, size));
|
|
}
|
|
|
|
private:
|
|
BufferSubDataStreamBuffer(GLenum target, GLuint buffer_id, u32 size)
|
|
: StreamBuffer(target, buffer_id, size)
|
|
, m_cpu_buffer(size)
|
|
{
|
|
}
|
|
|
|
std::vector<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 StreamBuffer
|
|
{
|
|
public:
|
|
~BufferDataStreamBuffer() override = default;
|
|
|
|
MappingResult Map(u32 alignment, u32 min_size) override
|
|
{
|
|
return MappingResult{static_cast<void*>(m_cpu_buffer.data()), 0, 0, m_size / alignment};
|
|
}
|
|
|
|
void Unmap(u32 used_size) override
|
|
{
|
|
if (used_size == 0)
|
|
return;
|
|
|
|
glBindBuffer(m_target, m_buffer_id);
|
|
glBufferData(m_target, used_size, m_cpu_buffer.data(), GL_STREAM_DRAW);
|
|
}
|
|
|
|
u32 GetChunkSize() const override
|
|
{
|
|
return m_size;
|
|
}
|
|
|
|
static std::unique_ptr<StreamBuffer> 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<StreamBuffer>(new BufferDataStreamBuffer(target, buffer_id, size));
|
|
}
|
|
|
|
private:
|
|
BufferDataStreamBuffer(GLenum target, GLuint buffer_id, u32 size)
|
|
: StreamBuffer(target, buffer_id, size)
|
|
, m_cpu_buffer(size)
|
|
{
|
|
}
|
|
|
|
std::vector<u8> m_cpu_buffer;
|
|
};
|
|
|
|
// Base class for implementations which require syncing.
|
|
class SyncingStreamBuffer : public StreamBuffer
|
|
{
|
|
public:
|
|
enum : u32
|
|
{
|
|
NUM_SYNC_POINTS = 16
|
|
};
|
|
|
|
virtual ~SyncingStreamBuffer() override
|
|
{
|
|
for (u32 i = m_available_block_index; i <= m_used_block_index; i++)
|
|
{
|
|
pxAssert(m_sync_objects[i]);
|
|
glDeleteSync(m_sync_objects[i]);
|
|
}
|
|
}
|
|
|
|
protected:
|
|
SyncingStreamBuffer(GLenum target, GLuint buffer_id, u32 size)
|
|
: StreamBuffer(target, buffer_id, size)
|
|
, m_bytes_per_block((size + (NUM_SYNC_POINTS)-1) / NUM_SYNC_POINTS)
|
|
{
|
|
}
|
|
|
|
__fi u32 GetSyncIndexForOffset(u32 offset) { return offset / m_bytes_per_block; }
|
|
|
|
__fi void AddSyncsForOffset(u32 offset)
|
|
{
|
|
const u32 end = GetSyncIndexForOffset(offset);
|
|
for (; m_used_block_index < end; m_used_block_index++)
|
|
{
|
|
pxAssert(!m_sync_objects[m_used_block_index]);
|
|
m_sync_objects[m_used_block_index] = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
|
|
}
|
|
}
|
|
|
|
__fi void WaitForSync(GLsync& sync)
|
|
{
|
|
glClientWaitSync(sync, GL_SYNC_FLUSH_COMMANDS_BIT, GL_TIMEOUT_IGNORED);
|
|
glDeleteSync(sync);
|
|
sync = nullptr;
|
|
}
|
|
|
|
__fi 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++)
|
|
{
|
|
pxAssert(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);
|
|
pxAssert((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};
|
|
}
|
|
|
|
void Unmap(u32 used_size) override
|
|
{
|
|
pxAssert((m_position + used_size) <= m_size);
|
|
if (!m_coherent)
|
|
{
|
|
Bind();
|
|
glFlushMappedBufferRange(m_target, m_position, used_size);
|
|
}
|
|
|
|
m_position += used_size;
|
|
}
|
|
|
|
static std::unique_ptr<StreamBuffer> 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));
|
|
pxAssertRel(mapped_ptr, "Persistent buffer was mapped");
|
|
|
|
return std::unique_ptr<StreamBuffer>(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 detail
|
|
|
|
std::unique_ptr<StreamBuffer> StreamBuffer::Create(GLenum target, u32 size)
|
|
{
|
|
std::unique_ptr<StreamBuffer> buf;
|
|
if (GLAD_GL_VERSION_4_4 || GLAD_GL_ARB_buffer_storage || GLAD_GL_EXT_buffer_storage)
|
|
{
|
|
buf = detail::BufferStorageStreamBuffer::Create(target, size);
|
|
if (buf)
|
|
return buf;
|
|
}
|
|
|
|
// BufferSubData is slower on all drivers except NVIDIA...
|
|
const char* vendor = reinterpret_cast<const char*>(glGetString(GL_VENDOR));
|
|
if (std::strstr(vendor, "NVIDIA"))
|
|
return detail::BufferSubDataStreamBuffer::Create(target, size);
|
|
else
|
|
return detail::BufferDataStreamBuffer::Create(target, size);
|
|
}
|
|
} // namespace GL
|