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/*
** gl_buffers.cpp
** Low level vertex buffer class
**
**---------------------------------------------------------------------------
** Copyright 2018-2020 Christoph Oelckers
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
**/
#include <algorithm>
#include "gles_system.h"
#include "gles_buffers.h"
#include "gles_renderstate.h"
#include "v_video.h"
#include "flatvertices.h"
namespace OpenGLESRenderer
{
//==========================================================================
//
// basic buffer implementation
//
//==========================================================================
static inline void InvalidateBufferState()
{
gl_RenderState.ResetVertexBuffer(); // force rebinding of buffers on next Apply call.
}
GLBuffer::GLBuffer(int usetype)
: mUseType(usetype)
{
if ((usetype == GL_ARRAY_BUFFER) || (usetype == GL_ELEMENT_ARRAY_BUFFER))
{
glGenBuffers(1, &mBufferId);
isData = false;
}
else
{
isData = true;
}
}
GLBuffer::~GLBuffer()
{
if (mBufferId != 0)
{
if (gles.useMappedBuffers)
{
glBindBuffer(mUseType, mBufferId);
glUnmapBuffer(mUseType);
}
glBindBuffer(mUseType, 0);
glDeleteBuffers(1, &mBufferId);
}
if (memory)
delete[] memory;
}
void GLBuffer::Bind()
{
if (!isData)
{
glBindBuffer(mUseType, mBufferId);
}
}
void GLBuffer::SetData(size_t size, const void* data, BufferUsageType usage)
{
bool staticdata = (usage == BufferUsageType::Static || usage == BufferUsageType::Mappable);
if (isData || !gles.useMappedBuffers)
{
if (memory)
delete[] memory;
memory = (char*)(new uint64_t[size / 8 + 16]);
if (data)
memcpy(memory, data, size);
}
if (!isData)
{
Bind();
glBufferData(mUseType, size, data, staticdata ? GL_STATIC_DRAW : GL_STREAM_DRAW);
}
if (!isData && gles.useMappedBuffers)
{
map = 0;
}
else
{
map = memory;
}
buffersize = size;
InvalidateBufferState();
}
void GLBuffer::SetSubData(size_t offset, size_t size, const void *data)
{
Bind();
memcpy(memory + offset, data, size);
if (!isData)
{
glBufferSubData(mUseType, offset, size, data);
}
}
void GLBuffer::Upload(size_t start, size_t size)
{
if (!gles.useMappedBuffers)
{
Bind();
if(size)
glBufferSubData(mUseType, start, size, memory + start);
}
}
void GLBuffer::Map()
{
if (!isData && gles.useMappedBuffers)
{
Bind();
map = (FFlatVertex*)glMapBufferRange(mUseType, 0, buffersize, GL_MAP_WRITE_BIT | GL_MAP_UNSYNCHRONIZED_BIT);
}
else
{
map = memory;
}
InvalidateBufferState();
}
void GLBuffer::Unmap()
{
if (!isData && gles.useMappedBuffers)
{
Bind();
glUnmapBuffer(mUseType);
InvalidateBufferState();
}
}
void *GLBuffer::Lock(unsigned int size)
{
// This initializes this buffer as a static object with no data.
SetData(size, nullptr, BufferUsageType::Mappable);
if (!isData && gles.useMappedBuffers)
{
return glMapBufferRange(mUseType, 0, size, GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT | GL_MAP_UNSYNCHRONIZED_BIT);
}
else
{
return map;
}
}
void GLBuffer::Unlock()
{
if (!isData)
{
if (gles.useMappedBuffers)
{
Bind();
glUnmapBuffer(mUseType);
InvalidateBufferState();
}
else
{
Bind();
glBufferData(mUseType, buffersize, map, GL_STATIC_DRAW);
InvalidateBufferState();
}
}
}
void GLBuffer::Resize(size_t newsize)
{
if (newsize > buffersize)
{
if (isData)
{
// Create new bigger memory
char* memoryNew = (char*)(new uint64_t[newsize / 8 + 16]);
// Copy old data
memcpy(memoryNew, memory, buffersize);
// Delete old memory
delete[] memory;
memory = memoryNew;
buffersize = newsize;
}
else
{
// TODO
}
}
}
void GLBuffer::GPUDropSync()
{
if (gles.glesMode > GLES_MODE_GLES && gles.useMappedBuffers && glFenceSync && glDeleteSync)
{
if (mGLSync != NULL)
{
glDeleteSync(mGLSync);
}
mGLSync = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
}
}
void GLBuffer::GPUWaitSync()
{
if (gles.glesMode > GLES_MODE_GLES && gles.useMappedBuffers && glDeleteSync && glClientWaitSync)
{
GLenum status = glClientWaitSync(mGLSync, GL_SYNC_FLUSH_COMMANDS_BIT, 1000 * 1000 * 50); // Wait for a max of 50ms...
if (status != GL_ALREADY_SIGNALED && status != GL_CONDITION_SATISFIED)
{
//Printf("Error on glClientWaitSync: %d\n", status);
}
glDeleteSync(mGLSync);
mGLSync = NULL;
}
}
//===========================================================================
//
// Vertex buffer implementation
//
//===========================================================================
void GLVertexBuffer::SetFormat(int numBindingPoints, int numAttributes, size_t stride, const FVertexBufferAttribute *attrs)
{
static int VFmtToGLFmt[] = { GL_FLOAT, GL_FLOAT, GL_FLOAT, GL_FLOAT, GL_UNSIGNED_BYTE, GL_INT_2_10_10_10_REV, GL_UNSIGNED_BYTE }; // TODO Fix last entry GL_INT_2_10_10_10_REV, normals for models will be broken
static uint8_t VFmtToSize[] = {4, 3, 2, 1, 4, 4, 4};
static bool VFmtToNormalize[] = { false, false, false, false, true, true, false };
static bool VFmtToIntegerType[] = { false, false, false, false, false, false, true };
mStride = stride;
mNumBindingPoints = numBindingPoints;
for(int i = 0; i < numAttributes; i++)
{
if (attrs[i].location >= 0 && attrs[i].location < VATTR_MAX)
{
auto & attrinf = mAttributeInfo[attrs[i].location];
attrinf.format = VFmtToGLFmt[attrs[i].format];
attrinf.size = VFmtToSize[attrs[i].format];
attrinf.offset = attrs[i].offset;
attrinf.bindingpoint = attrs[i].binding;
attrinf.normalize = VFmtToNormalize[attrs[i].format];
attrinf.integerType = VFmtToIntegerType[attrs[i].format];
}
}
}
void GLVertexBuffer::Bind(int *offsets)
{
int i = 0;
// This is what gets called from RenderState.Apply. It shouldn't be called anywhere else if the render state is in use
GLBuffer::Bind();
for(auto &attrinf : mAttributeInfo)
{
if (attrinf.size == 0)
{
glDisableVertexAttribArray(i);
}
else
{
glEnableVertexAttribArray(i);
size_t ofs = offsets == nullptr ? attrinf.offset : attrinf.offset + mStride * offsets[attrinf.bindingpoint];
if (!attrinf.integerType)
glVertexAttribPointer(i, attrinf.size, attrinf.format, attrinf.normalize, (GLsizei)mStride, (void*)(intptr_t)ofs);
else
{
if (gles.glesMode >= GLES_MODE_OGL3)
glVertexAttribIPointer(i, attrinf.size, attrinf.format, (GLsizei)mStride, (void*)(intptr_t)ofs);
}
}
i++;
}
}
void GLDataBuffer::BindRange(FRenderState *state, size_t start, size_t length)
{
if (mBindingPoint == 3)// VIEWPOINT_BINDINGPOINT
{
static_cast<FGLRenderState*>(state)->ApplyViewport(memory + start);
}
}
void GLDataBuffer::BindBase()
{
}
GLVertexBuffer::GLVertexBuffer() : GLBuffer(GL_ARRAY_BUFFER) {}
GLIndexBuffer::GLIndexBuffer() : GLBuffer(GL_ELEMENT_ARRAY_BUFFER) {}
GLDataBuffer::GLDataBuffer(int bindingpoint, bool is_ssbo) : GLBuffer(0), mBindingPoint(bindingpoint) {}
}