obs-StreamFX/source/gs-helper.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-helper.h"
Helper::VertexBuffer::VertexBuffer(size_t maxVertices) {
m_positions.resize(maxVertices);
m_normals.resize(maxVertices);
m_tangents.resize(maxVertices);
m_colors.resize(maxVertices);
m_uvs.resize(8);
m_uvArrays.resize(8);
for (size_t idx = 0; idx < 8; idx++) {
m_uvs[idx].resize(maxVertices);
m_uvArrays[idx].width = 2;
m_uvArrays[idx].array = m_uvs[idx].data();
}
m_vertexData = gs_vbdata_create();
m_vertexData->num = maxVertices;
m_vertexData->points = m_positions.data();
m_vertexData->normals = m_normals.data();
m_vertexData->tangents = m_normals.data();
m_vertexData->colors = m_colors.data();
m_vertexData->num_tex = m_uvs.size();
m_vertexData->tvarray = m_uvArrays.data();
m_vertexBuffer = gs_vertexbuffer_create(m_vertexData, GS_DYNAMIC);
}
Helper::VertexBuffer::~VertexBuffer() {
std::memset(m_vertexData, 0, sizeof(gs_vb_data));
gs_vertexbuffer_destroy(m_vertexBuffer);
}
void Helper::VertexBuffer::set_uv_layers(size_t count) {
size_t realcount = count > 8 ? 8 : count;
m_uvs.resize(realcount);
}
size_t Helper::VertexBuffer::get_uv_layers() {
return m_uvs.size();
}
gs_vertbuffer_t* Helper::VertexBuffer::update() {
// Update Buffers
size_t verts = this->size();
m_positions.resize(verts);
m_normals.resize(verts);
m_tangents.resize(verts);
m_colors.resize(verts);
for (size_t layer = 0; layer < m_uvs.size(); layer++) {
m_uvs[layer].resize(verts);
m_uvArrays[layer].width = 2;
m_uvArrays[layer].array = m_uvs[layer].data();
}
// Prepare Vertex Data
for (size_t vert = 0; vert < verts; vert++) {
Vertex& v = this->at(vert);
vec3_copy(&(m_positions.at(vert)), &v.position);
vec3_copy(&(m_normals.at(vert)), &v.normal);
vec3_copy(&(m_tangents.at(vert)), &v.tangent);
m_colors[vert] = v.color;
for (size_t layer = 0; layer < m_uvs.size(); layer++) {
vec2_copy(&m_uvs[layer][vert], &v.uv[layer]);
}
}
// Upload to GPU
m_vertexData->num = verts;
m_vertexData->points = m_positions.data();
m_vertexData->normals = m_normals.data();
m_vertexData->tangents = m_normals.data();
m_vertexData->colors = m_colors.data();
m_vertexData->num_tex = m_uvArrays.size();
m_vertexData->tvarray = m_uvArrays.data();
gs_vertexbuffer_flush(m_vertexBuffer);
return m_vertexBuffer;
}
Helper::Vertex::Vertex() {
position.x =
position.y =
position.z =
normal.x =
normal.y =
normal.z =
tangent.x =
tangent.y =
tangent.z = 0;
color = 0;
for (size_t idx = 0; idx < 8; idx++) {
uv[idx].x = uv[idx].y = 0;
}
}