95 lines
2.3 KiB
C++
95 lines
2.3 KiB
C++
/*
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QGL Buffer
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Ivan Pelipenko peri4ko@yandex.ru
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define GL_GLEXT_PROTOTYPES
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#include <QOpenGLExtraFunctions>
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#include "glbuffer.h"
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Buffer::Buffer(GLenum target, GLenum _usage) {
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target_ = target;
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usage_ = _usage;
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buffer_ = 0;
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prev_size = 0;
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}
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Buffer::~Buffer() {
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}
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void Buffer::init(QOpenGLExtraFunctions * f) {
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if (!isInit()) {
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f->glGenBuffers(1, &buffer_);
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}
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}
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void Buffer::destroy(QOpenGLExtraFunctions * f) {
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if (buffer_ != 0) {
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f->glDeleteBuffers(1, &buffer_);
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}
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buffer_ = 0;
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}
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void Buffer::reinit() {
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buffer_ = 0;
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prev_size = 0;
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}
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void Buffer::bind(QOpenGLExtraFunctions * f) {
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//qDebug() << "bind" << target_ << buffer_;
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f->glBindBuffer(target_, buffer_);
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}
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void Buffer::release(QOpenGLExtraFunctions * f) {
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f->glBindBuffer(target_, 0);
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}
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void * Buffer::map(QOpenGLExtraFunctions * f, GLbitfield mode, int size) {
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if (size < 0) size = prev_size;
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return f->glMapBufferRange(target_, 0, size, mode);
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}
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void Buffer::unmap(QOpenGLExtraFunctions * f) {
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f->glUnmapBuffer(target_);
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}
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bool Buffer::resize(QOpenGLExtraFunctions * f, int new_size) {
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if (new_size <= 0) return false;
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//qDebug() << "check resize buffer" << buffer_ << "bytes" << new_size << ", old =" << prev_size;
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if (new_size <= prev_size) return false;
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prev_size = new_size;
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//qDebug() << "resize buffer " << buffer_ << target_ << "for" << new_size << "bytes";
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f->glBufferData(target_, new_size, 0, usage_);
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return true;
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}
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void Buffer::load(QOpenGLExtraFunctions * f, const void * data, int size, int offset) {
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if (!data || size <= 0) return;
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//qDebug() << "load buffer" << buffer_ << "bytes" << size;
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f->glBufferSubData(target_, offset, size, data);
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}
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