dolphin/Source/Plugins/Plugin_VideoOGL/Src/StreamBuffer.cpp

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// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#include "Globals.h"
#include "GLUtil.h"
#include "StreamBuffer.h"
#include "MemoryUtil.h"
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#include "Render.h"
namespace OGL
{
static const u32 SYNC_POINTS = 16;
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static const u32 ALIGN_PINNED_MEMORY = 4096;
StreamBuffer::StreamBuffer(u32 type, size_t size, StreamType uploadType)
: m_uploadtype(uploadType), m_buffertype(type), m_size(size)
{
glGenBuffers(1, &m_buffer);
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bool nvidia = !strcmp(g_ogl_config.gl_vendor, "NVIDIA Corporation");
if(m_uploadtype & STREAM_DETECT)
{
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if(!g_ogl_config.bSupportsGLBaseVertex && (m_uploadtype & BUFFERSUBDATA))
m_uploadtype = BUFFERSUBDATA;
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else if(g_ogl_config.bSupportsGLSync && g_Config.bHackedBufferUpload && (m_uploadtype & MAP_AND_RISK))
m_uploadtype = MAP_AND_RISK;
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else if(g_ogl_config.bSupportsGLSync && g_ogl_config.bSupportsGLPinnedMemory && (m_uploadtype & PINNED_MEMORY))
m_uploadtype = PINNED_MEMORY;
else if(nvidia && (m_uploadtype & BUFFERSUBDATA))
m_uploadtype = BUFFERSUBDATA;
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else if(g_ogl_config.bSupportsGLSync && (m_uploadtype & MAP_AND_SYNC))
m_uploadtype = MAP_AND_SYNC;
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else
m_uploadtype = MAP_AND_ORPHAN;
}
Init();
}
StreamBuffer::~StreamBuffer()
{
Shutdown();
glDeleteBuffers(1, &m_buffer);
}
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#define SLOT(x) (x)*SYNC_POINTS/m_size
void StreamBuffer::Alloc ( size_t size, u32 stride )
{
size_t m_iterator_aligned = m_iterator;
if(m_iterator_aligned && stride) {
m_iterator_aligned--;
m_iterator_aligned = m_iterator_aligned - (m_iterator_aligned % stride) + stride;
}
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size_t iter_end = m_iterator_aligned + size;
switch(m_uploadtype) {
case MAP_AND_ORPHAN:
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if(iter_end >= m_size) {
glBufferData(m_buffertype, m_size, NULL, GL_STREAM_DRAW);
m_iterator_aligned = 0;
}
break;
case MAP_AND_SYNC:
case PINNED_MEMORY:
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// insert waiting slots for used memory
for(u32 i=SLOT(m_used_iterator); i<SLOT(m_iterator); i++)
{
fences[i] = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
}
m_used_iterator = m_iterator;
// wait for new slots to end of buffer
for(u32 i=SLOT(m_free_iterator)+1; i<=SLOT(iter_end) && i < SYNC_POINTS; i++)
{
glClientWaitSync(fences[i], GL_SYNC_FLUSH_COMMANDS_BIT, GL_TIMEOUT_IGNORED);
glDeleteSync(fences[i]);
}
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m_free_iterator = iter_end;
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// if buffer is full
if(iter_end >= m_size) {
// insert waiting slots in unused space at the end of the buffer
for(u32 i=SLOT(m_used_iterator); i < SYNC_POINTS; i++)
fences[i] = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
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// move to the start
m_used_iterator = m_iterator_aligned = m_iterator = 0; // offset 0 is always aligned
iter_end = size;
// wait for space at the start
for(u32 i=0; i<=SLOT(iter_end); i++)
{
glClientWaitSync(fences[i], GL_SYNC_FLUSH_COMMANDS_BIT, GL_TIMEOUT_IGNORED);
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glDeleteSync(fences[i]);
}
m_free_iterator = iter_end;
}
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break;
case MAP_AND_RISK:
if(iter_end >= m_size) {
m_iterator_aligned = 0;
}
break;
case BUFFERSUBDATA:
m_iterator_aligned = 0;
break;
case STREAM_DETECT:
case DETECT_MASK: // Just to shutup warnings
break;
}
m_iterator = m_iterator_aligned;
}
size_t StreamBuffer::Upload ( u8* data, size_t size )
{
switch(m_uploadtype) {
case MAP_AND_SYNC:
case MAP_AND_ORPHAN:
pointer = (u8*)glMapBufferRange(m_buffertype, m_iterator, size, GL_MAP_WRITE_BIT | GL_MAP_UNSYNCHRONIZED_BIT);
if(pointer) {
memcpy(pointer, data, size);
glUnmapBuffer(m_buffertype);
} else {
ERROR_LOG(VIDEO, "Buffer mapping failed");
}
break;
case PINNED_MEMORY:
case MAP_AND_RISK:
if(pointer)
memcpy(pointer+m_iterator, data, size);
break;
case BUFFERSUBDATA:
glBufferSubData(m_buffertype, m_iterator, size, data);
break;
case STREAM_DETECT:
case DETECT_MASK: // Just to shutup warnings
break;
}
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size_t ret = m_iterator;
m_iterator += size;
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return ret;
}
void StreamBuffer::Init()
{
m_iterator = 0;
m_used_iterator = 0;
m_free_iterator = 0;
switch(m_uploadtype) {
case MAP_AND_SYNC:
fences = new GLsync[SYNC_POINTS];
for(u32 i=0; i<SYNC_POINTS; i++)
fences[i] = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
case MAP_AND_ORPHAN:
case BUFFERSUBDATA:
glBindBuffer(m_buffertype, m_buffer);
glBufferData(m_buffertype, m_size, NULL, GL_STREAM_DRAW);
break;
case PINNED_MEMORY:
glGetError(); // errors before this allocation should be ignored
fences = new GLsync[SYNC_POINTS];
for(u32 i=0; i<SYNC_POINTS; i++)
fences[i] = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
pointer = (u8*)AllocateAlignedMemory(ROUND_UP(m_size,ALIGN_PINNED_MEMORY), ALIGN_PINNED_MEMORY );
glBindBuffer(GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD, m_buffer);
glBufferData(GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD, ROUND_UP(m_size,ALIGN_PINNED_MEMORY), pointer, GL_STREAM_COPY);
glBindBuffer(GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD, 0);
glBindBuffer(m_buffertype, m_buffer);
// on error, switch to another backend. some old catalyst seems to have broken pinned memory support
if(glGetError() != GL_NO_ERROR) {
ERROR_LOG(VIDEO, "Pinned memory detected, but not working. Please report this: %s, %s, %s", g_ogl_config.gl_vendor, g_ogl_config.gl_renderer, g_ogl_config.gl_version);
Shutdown();
m_uploadtype = MAP_AND_SYNC;
Init();
}
break;
case MAP_AND_RISK:
glBindBuffer(m_buffertype, m_buffer);
glBufferData(m_buffertype, m_size, NULL, GL_STREAM_DRAW);
pointer = (u8*)glMapBuffer(m_buffertype, GL_WRITE_ONLY);
glUnmapBuffer(m_buffertype);
if(!pointer)
ERROR_LOG(VIDEO, "Buffer allocation failed");
case STREAM_DETECT:
case DETECT_MASK: // Just to shutup warnings
break;
}
}
void StreamBuffer::Shutdown()
{
switch(m_uploadtype) {
case MAP_AND_SYNC:
for(u32 i=0; i<SYNC_POINTS; i++)
glDeleteSync(fences[i]);
delete [] fences;
break;
case MAP_AND_RISK:
case MAP_AND_ORPHAN:
case BUFFERSUBDATA:
break;
case PINNED_MEMORY:
for(u32 i=0; i<SYNC_POINTS; i++)
glDeleteSync(fences[i]);
delete [] fences;
glBindBuffer(m_buffertype, 0);
glFinish(); // ogl pipeline must be flushed, else this buffer can be in use
FreeAlignedMemory(pointer);
break;
case STREAM_DETECT:
case DETECT_MASK: // Just to shutup warnings
break;
}
}
}