pcsx2/plugins/GSdx_legacy/GSVertexArrayOGL.h

335 lines
8.7 KiB
C++

/*
* Copyright (C) 2011-2011 Gregory hainaut
* Copyright (C) 2007-2009 Gabest
*
* This Program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This Program 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 GNU Make; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA USA.
* http://www.gnu.org/copyleft/gpl.html
*
*/
#pragma once
#include "config.h"
#ifdef ENABLE_OGL_DEBUG_MEM_BW
extern uint64 g_vertex_upload_byte;
#endif
struct GSInputLayoutOGL {
GLint size;
GLenum type;
GLboolean normalize;
GLsizei stride;
const GLvoid* offset;
};
template<int STRIDE>
class GSBufferOGL {
size_t m_start;
size_t m_count;
size_t m_limit;
const GLenum m_target;
GLuint m_buffer_name;
uint8* m_buffer_ptr;
const bool m_buffer_storage;
GLsync m_fence[5];
public:
GSBufferOGL(GLenum target)
: m_start(0)
, m_count(0)
, m_limit(0)
, m_target(target)
, m_buffer_storage(GLLoader::found_GL_ARB_buffer_storage)
{
glGenBuffers(1, &m_buffer_name);
// Opengl works best with 1-4MB buffer.
// Warning m_limit is the number of object (not the size in Bytes)
m_limit = 8 * 1024 * 1024 / STRIDE;
for (size_t i = 0; i < 5; i++) {
m_fence[i] = 0;
}
if (m_buffer_storage) {
// TODO: if we do manually the synchronization, I'm not sure size is important. It worths to investigate it.
// => bigger buffer => less sync
bind();
// coherency will be done by flushing
const GLbitfield common_flags = GL_MAP_WRITE_BIT | GL_MAP_PERSISTENT_BIT;
const GLbitfield map_flags = common_flags | GL_MAP_FLUSH_EXPLICIT_BIT;
const GLbitfield create_flags = common_flags | GL_CLIENT_STORAGE_BIT;
glBufferStorage(m_target, STRIDE * m_limit, NULL, create_flags );
m_buffer_ptr = (uint8*) glMapBufferRange(m_target, 0, STRIDE * m_limit, map_flags);
if (!m_buffer_ptr) {
fprintf(stderr, "Failed to map buffer\n");
throw GSDXError();
}
} else {
m_buffer_ptr = NULL;
}
}
~GSBufferOGL() {
if (m_buffer_storage) {
for (size_t i = 0; i < 5; i++) {
glDeleteSync(m_fence[i]);
}
// Don't know if we must do it
bind();
glUnmapBuffer(m_target);
}
glDeleteBuffers(1, &m_buffer_name);
}
void allocate() { allocate(m_limit); }
void allocate(size_t new_limit)
{
if (!m_buffer_storage) {
m_start = 0;
m_limit = new_limit;
glBufferData(m_target, m_limit * STRIDE, NULL, GL_STREAM_DRAW);
}
}
void bind()
{
glBindBuffer(m_target, m_buffer_name);
}
void subdata_upload(const void* src)
{
// Current GPU buffer is really too small need to allocate a new one
if (m_count > m_limit) {
//fprintf(stderr, "Allocate a new buffer\n %d", STRIDE);
allocate(std::max<int>(m_count * 3 / 2, m_limit));
} else if (m_count > (m_limit - m_start) ) {
//fprintf(stderr, "Orphan the buffer %d\n", STRIDE);
// Not enough left free room. Just go back at the beginning
m_start = 0;
// Orphan the buffer to avoid synchronization
allocate(m_limit);
}
glBufferSubData(m_target, STRIDE * m_start, STRIDE * m_count, src);
}
void map_upload(const void* src)
{
ASSERT(m_count < m_limit);
size_t offset = m_start * STRIDE;
size_t length = m_count * STRIDE;
if (m_count > (m_limit - m_start) ) {
size_t current_chunk = offset >> 21;
#ifdef ENABLE_OGL_DEBUG_FENCE
fprintf(stderr, "%x: Wrap buffer\n", m_target);
fprintf(stderr, "%x: Insert a fence in chunk %d\n", m_target, current_chunk);
#endif
ASSERT(current_chunk > 0 && current_chunk < 5);
if (m_fence[current_chunk] == 0) {
m_fence[current_chunk] = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
}
// Wrap at startup
m_start = 0;
offset = 0;
// Only check first chunk
if (m_fence[0]) {
#ifdef ENABLE_OGL_DEBUG_FENCE
GLenum status = glClientWaitSync(m_fence[0], GL_SYNC_FLUSH_COMMANDS_BIT, GL_TIMEOUT_IGNORED);
if (status != GL_ALREADY_SIGNALED) {
fprintf(stderr, "%x: Sync Sync! Buffer too small\n", m_target);
}
#else
glClientWaitSync(m_fence[0], GL_SYNC_FLUSH_COMMANDS_BIT, GL_TIMEOUT_IGNORED);
#endif
glDeleteSync(m_fence[0]);
m_fence[0] = 0;
}
}
// Protect buffer with fences
size_t current_chunk = offset >> 21;
size_t next_chunk = (offset + length) >> 21;
for (size_t c = current_chunk + 1; c <= next_chunk; c++) {
#ifdef ENABLE_OGL_DEBUG_FENCE
fprintf(stderr, "%x: Insert a fence in chunk %d\n", m_target, c-1);
#endif
ASSERT(c > 0 && c < 5);
m_fence[c-1] = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
if (m_fence[c]) {
#ifdef ENABLE_OGL_DEBUG_FENCE
GLenum status = glClientWaitSync(m_fence[c], GL_SYNC_FLUSH_COMMANDS_BIT, GL_TIMEOUT_IGNORED);
#else
glClientWaitSync(m_fence[c], GL_SYNC_FLUSH_COMMANDS_BIT, GL_TIMEOUT_IGNORED);
#endif
glDeleteSync(m_fence[c]);
m_fence[c] = 0;
#ifdef ENABLE_OGL_DEBUG_FENCE
if (status != GL_ALREADY_SIGNALED) {
fprintf(stderr, "%x: Sync Sync! Buffer too small\n", m_target);
}
#endif
}
}
void* dst = m_buffer_ptr + offset;
memcpy(dst, src, length);
glFlushMappedBufferRange(m_target, offset, length);
}
void upload(const void* src, uint32 count)
{
#ifdef ENABLE_OGL_DEBUG_MEM_BW
g_vertex_upload_byte += count * STRIDE;
#endif
m_count = count;
if (m_buffer_storage) {
map_upload(src);
} else {
subdata_upload(src);
}
}
void EndScene()
{
m_start += m_count;
m_count = 0;
}
void Draw(GLenum mode)
{
glDrawArrays(mode, m_start, m_count);
}
void Draw(GLenum mode, int offset, int count)
{
glDrawArrays(mode, m_start + offset, count);
}
void Draw(GLenum mode, GLint basevertex)
{
glDrawElementsBaseVertex(mode, m_count, GL_UNSIGNED_INT, (void*)(m_start * STRIDE), basevertex);
}
void Draw(GLenum mode, GLint basevertex, int offset, int count)
{
glDrawElementsBaseVertex(mode, count, GL_UNSIGNED_INT, (void*)((m_start + offset) * STRIDE), basevertex);
}
size_t GetStart() { return m_start; }
};
class GSVertexBufferStateOGL {
GSBufferOGL<sizeof(GSVertexPT1)> *m_vb;
GSBufferOGL<sizeof(uint32)> *m_ib;
GLuint m_va;
GLenum m_topology;
// No copy constructor please
GSVertexBufferStateOGL(const GSVertexBufferStateOGL& ) = delete;
public:
GSVertexBufferStateOGL(GSInputLayoutOGL* layout, uint32 layout_nbr) : m_vb(NULL), m_ib(NULL), m_topology(0)
{
glGenVertexArrays(1, &m_va);
glBindVertexArray(m_va);
m_vb = new GSBufferOGL<sizeof(GSVertexPT1)>(GL_ARRAY_BUFFER);
m_ib = new GSBufferOGL<sizeof(uint32)>(GL_ELEMENT_ARRAY_BUFFER);
m_vb->bind();
m_ib->bind();
m_vb->allocate();
m_ib->allocate();
set_internal_format(layout, layout_nbr);
}
void bind()
{
// Note: index array are part of the VA state so it need to be bound only once.
glBindVertexArray(m_va);
if (m_vb)
m_vb->bind();
}
void set_internal_format(GSInputLayoutOGL* layout, uint32 layout_nbr)
{
for (uint32 i = 0; i < layout_nbr; i++) {
// Note this function need both a vertex array object and a GL_ARRAY_BUFFER buffer
glEnableVertexAttribArray(i);
switch (layout[i].type) {
case GL_UNSIGNED_SHORT:
case GL_UNSIGNED_INT:
if (layout[i].normalize) {
glVertexAttribPointer(i, layout[i].size, layout[i].type, layout[i].normalize, layout[i].stride, layout[i].offset);
} else {
// Rule: when shader use integral (not normalized) you must use glVertexAttribIPointer (note the extra I)
glVertexAttribIPointer(i, layout[i].size, layout[i].type, layout[i].stride, layout[i].offset);
}
break;
default:
glVertexAttribPointer(i, layout[i].size, layout[i].type, layout[i].normalize, layout[i].stride, layout[i].offset);
break;
}
}
}
void EndScene()
{
m_vb->EndScene();
m_ib->EndScene();
}
void DrawPrimitive() { m_vb->Draw(m_topology); }
void DrawPrimitive(int offset, int count) { m_vb->Draw(m_topology, offset, count); }
void DrawIndexedPrimitive() { m_ib->Draw(m_topology, m_vb->GetStart() ); }
void DrawIndexedPrimitive(int offset, int count) { m_ib->Draw(m_topology, m_vb->GetStart(), offset, count ); }
void SetTopology(GLenum topology) { m_topology = topology; }
void UploadVB(const void* vertices, size_t count) { m_vb->upload(vertices, count); }
void UploadIB(const void* index, size_t count) {
m_ib->upload(index, count);
}
~GSVertexBufferStateOGL()
{
glDeleteVertexArrays(1, &m_va);
delete m_vb;
delete m_ib;
}
};