mirror of
https://github.com/OpenSpace/OpenSpace.git
synced 2026-01-08 04:31:08 -06:00
3cad506b5b
- Started working on PowerScaling with some initial changes - Faking the stars by blending with the abuffer - Changed texture filtering for planets, looks better in my opinion
122 lines
5.2 KiB
C++
122 lines
5.2 KiB
C++
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014 *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this *
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* software and associated documentation files (the "Software"), to deal in the Software *
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* without restriction, including without limitation the rights to use, copy, modify, *
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* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to *
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* permit persons to whom the Software is furnished to do so, subject to the following *
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* conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in all copies *
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* or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, *
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A *
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* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT *
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF *
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE *
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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****************************************************************************************/
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#include <openspace/abuffer/abufferdynamic.h>
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#include <openspace/engine/openspaceengine.h>
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#include <ghoul/filesystem/filesystem.h>
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#include <ghoul/logging/logmanager.h>
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#include <iostream>
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#include <fstream>
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#include <string>
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namespace {
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std::string _loggerCat = "ABufferDynamic";
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}
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namespace openspace {
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ABufferDynamic::ABufferDynamic(): _data(0), _anchorPointerTexture(0),
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_anchorPointerTextureInitializer(0), _atomicCounterBuffer(0), _fragmentBuffer(0),
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_fragmentTexture(0)
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{}
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ABufferDynamic::~ABufferDynamic() {
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if(_data != 0)
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delete _data;
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glDeleteTextures(1,&_anchorPointerTexture);
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glDeleteTextures(1,&_fragmentTexture);
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glDeleteBuffers(1,&_anchorPointerTextureInitializer);
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glDeleteBuffers(1,&_atomicCounterBuffer);
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glDeleteBuffers(1,&_anchorPointerTextureInitializer);
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}
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bool ABufferDynamic::initialize() {
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// ============================
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// BUFFERS
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// ============================
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glGenTextures(1, &_anchorPointerTexture);
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glBindTexture(GL_TEXTURE_2D, _anchorPointerTexture);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_R32UI, _width, _height, 0, GL_RED_INTEGER, GL_UNSIGNED_INT, NULL);
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glGenBuffers(1, &_anchorPointerTextureInitializer);
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glBindBuffer(GL_PIXEL_UNPACK_BUFFER, _anchorPointerTextureInitializer);
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glBufferData(GL_PIXEL_UNPACK_BUFFER, _totalPixels * sizeof(GLuint), NULL, GL_STATIC_DRAW);
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_data = (GLuint*)glMapBuffer(GL_PIXEL_UNPACK_BUFFER, GL_WRITE_ONLY);
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memset(_data, 0x00, _totalPixels * sizeof(GLuint));
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glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER);
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glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
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glGenBuffers(1, &_atomicCounterBuffer);
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glBindBuffer(GL_ATOMIC_COUNTER_BUFFER, _atomicCounterBuffer);
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glBufferData(GL_ATOMIC_COUNTER_BUFFER, sizeof(GLuint), NULL, GL_DYNAMIC_COPY);
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glGenBuffers(1, &_fragmentBuffer);
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glBindBuffer(GL_TEXTURE_BUFFER, _fragmentBuffer);
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glBufferData(GL_TEXTURE_BUFFER, MAX_LAYERS*_totalPixels*sizeof(GLfloat)*4, NULL, GL_DYNAMIC_COPY);
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glGenTextures(1, &_fragmentTexture);
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glBindTexture(GL_TEXTURE_BUFFER, _fragmentTexture);
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glTexBuffer(GL_TEXTURE_BUFFER, GL_RGBA32UI, _fragmentBuffer);
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glBindTexture(GL_TEXTURE_BUFFER, 0);
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glBindImageTexture(1, _fragmentTexture, 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_RGBA32UI);
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return initializeABuffer();
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}
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void ABufferDynamic::clear() {
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glBindBuffer(GL_PIXEL_UNPACK_BUFFER, _anchorPointerTextureInitializer);
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glBindTexture(GL_TEXTURE_2D, _anchorPointerTexture);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_R32UI, _width, _height, 0, GL_RED_INTEGER, GL_UNSIGNED_INT, NULL);
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glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
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static const GLuint zero = 1;
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glBindBufferBase(GL_ATOMIC_COUNTER_BUFFER, 0, _atomicCounterBuffer);
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glBufferSubData(GL_ATOMIC_COUNTER_BUFFER, 0, sizeof(zero), &zero);
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glBindBufferBase(GL_ATOMIC_COUNTER_BUFFER, 0, 0);
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}
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void ABufferDynamic::preRender() {
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// Bind head-pointer image for read-write
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glBindBufferBase(GL_ATOMIC_COUNTER_BUFFER, 0, _atomicCounterBuffer);
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glBindImageTexture(0, _anchorPointerTexture, 0, GL_FALSE, 0, GL_READ_WRITE, GL_R32UI);
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glBindImageTexture(1, _fragmentTexture, 0, GL_FALSE, 0, GL_READ_WRITE, GL_RGBA32UI);
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}
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void ABufferDynamic::postRender() {
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}
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std::string ABufferDynamic::settings() {
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return R"(#define ABUFFER_SINGLE_LINKED)";
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}
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} // openspace
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