obs-StreamFX/source/gs-vertexbuffer.cpp

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/*
* Modern effects for a modern Streamer
* Copyright (C) 2017 Michael Fabian Dirks
*
* 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 of the License, 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "gs-vertexbuffer.h"
#include <stdexcept>
extern "C" {
#pragma warning( push )
#pragma warning( disable: 4201 )
#include <libobs/obs.h>
#pragma warning( pop )
}
const uint32_t defaultMaximumVertices = 65535u;
GS::VertexBuffer::VertexBuffer(uint32_t maximumVertices) {
m_maximumVertices = maximumVertices;
m_uvwLayers = MAXIMUM_UVW_LAYERS;
// Reserve Space
m_vertexbufferdata.num = m_maximumVertices;
m_data.positions.resize(m_maximumVertices);
m_vertexbufferdata.points = m_data.positions.data();
m_data.normals.resize(m_maximumVertices);
m_vertexbufferdata.normals = m_data.normals.data();
m_data.tangents.resize(m_maximumVertices);
m_vertexbufferdata.tangents = m_data.tangents.data();
m_data.colors.resize(m_maximumVertices);
m_vertexbufferdata.colors = m_data.colors.data();
m_vertexbufferdata.num_tex = m_uvwLayers;
m_data.uvws.resize(m_uvwLayers);
m_data.uvwdata.resize(m_uvwLayers);
for (uint32_t n = 0; n < m_uvwLayers; n++) {
m_data.uvws[n].resize(m_maximumVertices);
m_data.uvwdata[n].width = 4;
m_data.uvwdata[n].array = m_data.uvws[n].data();
}
m_vertexbufferdata.tvarray = m_data.uvwdata.data();
// Allocate GPU
obs_enter_graphics();
m_vertexbuffer = gs_vertexbuffer_create(&m_vertexbufferdata, GS_DYNAMIC | GS_DUP_BUFFER);
obs_leave_graphics();
if (!m_vertexbuffer) {
throw std::runtime_error("Failed to create vertex buffer.");
}
}
GS::VertexBuffer::VertexBuffer(gs_vertbuffer_t* vb) {
m_vertexbuffer = vb;
}
GS::VertexBuffer::VertexBuffer() : VertexBuffer(defaultMaximumVertices) {}
GS::VertexBuffer::VertexBuffer(std::vector<Vertex>& other) : VertexBuffer((uint32_t)other.capacity()) {
std::copy(other.begin(), other.end(), this->end());
}
GS::VertexBuffer::VertexBuffer(VertexBuffer& other) : VertexBuffer(other.m_maximumVertices) {
std::copy(other.begin(), other.end(), this->end());
}
GS::VertexBuffer::~VertexBuffer() {
if (m_vertexbuffer) {
std::memset(&m_vertexbufferdata, 0, sizeof(m_vertexbufferdata));
obs_enter_graphics();
gs_vertexbuffer_destroy(m_vertexbuffer);
obs_leave_graphics();
}
m_vertexbuffer = nullptr;
}
void GS::VertexBuffer::set_uv_layers(uint32_t layers) {
m_uvwLayers = layers;
}
uint32_t GS::VertexBuffer::uv_layers() {
return m_uvwLayers;
}
gs_vertbuffer_t* GS::VertexBuffer::get(bool refreshGPU) {
if (refreshGPU) {
if (size() > m_maximumVertices)
throw std::runtime_error("Too many vertices in Vertex Buffer.");
for (size_t vertexIdx = 0; vertexIdx < size(); vertexIdx++) {
Vertex& v = this->at(vertexIdx);
vec3_copy(&m_data.positions[vertexIdx], &(v.position));
vec3_copy(&m_data.normals[vertexIdx], &(v.normal));
vec3_copy(&m_data.tangents[vertexIdx], &(v.tangent));
for (size_t texcoordIdx = 0; texcoordIdx < m_uvwLayers; texcoordIdx++) {
vec4_copy(&m_data.uvws[texcoordIdx][vertexIdx], &(v.uv[texcoordIdx]));
}
m_data.colors[vertexIdx] = v.color;
}
m_vertexbufferdata.num = size();
m_vertexbufferdata.num_tex = m_uvwLayers;
obs_enter_graphics();
gs_vertexbuffer_flush_direct(m_vertexbuffer, &m_vertexbufferdata);
obs_leave_graphics();
}
return m_vertexbuffer;
}
gs_vertbuffer_t* GS::VertexBuffer::get() {
return get(true);
}