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pcsx2/plugins/GSdx/GSVertexArrayOGL.h

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/*
* 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 uint32 g_vertex_upload_byte;
#endif
struct GSInputLayoutOGL {
GLint size;
GLenum type;
GLboolean normalize;
GLsizei stride;
const GLvoid* offset;
};
class GSBufferOGL {
const size_t m_stride;
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;
public:
GSBufferOGL(GLenum target, size_t stride) :
m_stride(stride)
, m_start(0)
, m_count(0)
, m_limit(0)
, m_target(target)
, m_buffer_storage((theApp.GetConfig("ogl_vertex_storage", 0) == 1) && GLLoader::found_GL_ARB_buffer_storage)
{
gl_GenBuffers(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 = 2 * 2 * 1024 * 1024 / m_stride;
if (m_buffer_storage) {
#ifndef ENABLE_GLES
bind();
// FIXME do I need the dynamic
const GLbitfield map_flags = GL_MAP_WRITE_BIT
| GL_MAP_PERSISTENT_BIT
// | GL_MAP_COHERENT_BIT (see barrier in GSDeviceOGL::BeforeDraw)
| GL_MAP_FLUSH_EXPLICIT_BIT
;
const GLbitfield create_flags = map_flags
// | GL_CLIENT_STORAGE_BIT
;
gl_BufferStorage(m_target, m_stride*m_limit, NULL, create_flags );
m_buffer_ptr = (uint8*) gl_MapBufferRange(m_target, 0, m_stride*m_limit, map_flags);
#endif
} else {
m_buffer_ptr = NULL;
}
}
~GSBufferOGL() {
if (m_buffer_storage) {
bind();
gl_UnmapBuffer(m_target);
}
gl_DeleteBuffers(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;
gl_BufferData(m_target, m_limit * m_stride, NULL, GL_STREAM_DRAW);
}
}
void bind()
{
gl_BindBuffer(m_target, m_buffer_name);
}
void subdata_upload(const void* src, uint32 count)
{
m_count = count;
// 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", m_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", m_stride);
// Not enough left free room. Just go back at the beginning
m_start = 0;
// Orphan the buffer to avoid synchronization
allocate(m_limit);
}
gl_BufferSubData(m_target, m_stride * m_start, m_stride * m_count, src);
}
void map_upload(const void* src, uint32 count)
{
void* dst;
m_count = count;
size_t offset = m_start*m_stride;
size_t length = m_count*m_stride;
// Get the pointer of the buffer
{
// It would need some protection of the data. For the moment finger cross!
if (m_count > m_limit) {
fprintf(stderr, "Buffer (%x) too small! Please report it upstream\n", m_target);
ASSERT(0);
} else if (m_count > (m_limit - m_start) ) {
//fprintf(stderr, "Wrap buffer (%x)\n", m_target);
// Wrap at startup
m_start = 0;
offset = 0;
}
dst = m_buffer_ptr + offset;
}
#if 0
// FIXME which one to use. Note dst doesn't have any aligment guarantee
// because it depends of the offset
if (m_target == GL_ARRAY_BUFFER) {
GSVector4i::storent(dst, src, length);
} else {
memcpy(dst, src, length);
}
#else
memcpy(dst, src, length);
#endif
#if 1
gl_FlushMappedBufferRange(m_target, offset, length);
#endif
}
#ifdef ENABLE_GLES
void upload(const void* src, uint32 count, uint32 basevertex = 0)
#else
void upload(const void* src, uint32 count)
#endif
{
#ifdef ENABLE_GLES
// Emulate gl_DrawElementsBaseVertex... Maybe GLES 4 you know!
if (basevertex) {
uint32* data = (uint32*) src;
for (uint32 i = 0; i < count; i++) {
data[i] += basevertex;
}
}
#endif
#ifdef ENABLE_OGL_DEBUG_MEM_BW
g_vertex_upload_byte += count*m_stride;
#endif
if (m_buffer_storage) {
map_upload(src, count);
} else {
subdata_upload(src, count);
}
}
void EndScene()
{
m_start += m_count;
m_count = 0;
}
void Draw(GLenum mode)
{
glDrawArrays(mode, m_start, m_count);
}
void Draw(GLenum mode, GLint basevertex)
{
#ifdef ENABLE_GLES
glDrawElements(mode, m_count, GL_UNSIGNED_INT, (void*)(m_start * m_stride));
#else
gl_DrawElementsBaseVertex(mode, m_count, GL_UNSIGNED_INT, (void*)(m_start * m_stride), basevertex);
#endif
}
void Draw(GLenum mode, GLint basevertex, int offset, int count)
{
#ifdef ENABLE_GLES
glDrawElements(mode, count, GL_UNSIGNED_INT, (void*)((m_start + offset) * m_stride));
#else
gl_DrawElementsBaseVertex(mode, count, GL_UNSIGNED_INT, (void*)((m_start + offset) * m_stride), basevertex);
#endif
}
size_t GetStart() { return m_start; }
void debug()
{
fprintf(stderr, "data buffer: start %d, count %d\n", m_start, m_count);
}
};
class GSVertexBufferStateOGL {
GSBufferOGL *m_vb;
GSBufferOGL *m_ib;
GLuint m_va;
GLenum m_topology;
public:
GSVertexBufferStateOGL(size_t stride, GSInputLayoutOGL* layout, uint32 layout_nbr)
{
gl_GenVertexArrays(1, &m_va);
m_vb = new GSBufferOGL(GL_ARRAY_BUFFER, stride);
m_ib = new GSBufferOGL(GL_ELEMENT_ARRAY_BUFFER, sizeof(uint32));
bind();
// Note: index array are part of the VA state so it need to be bound only once.
m_ib->bind();
m_vb->allocate();
m_ib->allocate();
set_internal_format(layout, layout_nbr);
}
void bind()
{
gl_BindVertexArray(m_va);
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
gl_EnableVertexAttribArray(i);
switch (layout[i].type) {
case GL_UNSIGNED_SHORT:
case GL_UNSIGNED_INT:
if (layout[i].normalize) {
gl_VertexAttribPointer(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 gl_VertexAttribIPointer (note the extra I)
gl_VertexAttribIPointer(i, layout[i].size, layout[i].type, layout[i].stride, layout[i].offset);
}
break;
default:
gl_VertexAttribPointer(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 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) {
#ifdef ENABLE_GLES
m_ib->upload(index, count, m_vb->GetStart());
#else
m_ib->upload(index, count);
#endif
}
~GSVertexBufferStateOGL()
{
gl_DeleteVertexArrays(1, &m_va);
delete m_vb;
delete m_ib;
}
void debug()
{
string topo;
switch (m_topology) {
case GL_POINTS:
topo = "point";
break;
case GL_LINES:
topo = "line";
break;
case GL_TRIANGLES:
topo = "triangle";
break;
case GL_TRIANGLE_STRIP:
topo = "triangle strip";
break;
}
m_vb->debug();
m_ib->debug();
fprintf(stderr, "primitives of %s\n", topo.c_str());
}
};
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