51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
/*
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QGL FramebufferMipmap
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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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#include <QOpenGLExtraFunctions>
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#include "glframebuffer_mipmap.h"
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#include <QTime>
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FramebufferMipmap::FramebufferMipmap(const Framebuffer & fb, int index_from_, int levels): src_fb(fb) {
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index_from = index_from_;
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for (int i = 0; i < levels; ++i)
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fbo << new Framebuffer(fb.f, 1, false, fb.color_formats[index_from]);
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}
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FramebufferMipmap::~FramebufferMipmap() {
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}
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void FramebufferMipmap::resize() {
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QSize sz = src_fb.size();
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for (int i = 0; i < fbo.size(); ++i) {
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sz /= 2;
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fbo[i]->resize(sz.width(), sz.height());
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}
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}
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void FramebufferMipmap::create() {
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if (fbo.isEmpty()) return;
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src_fb.blit(index_from, fbo[0]->id(), 0, src_fb.rect(), fbo[0]->rect(), GL_COLOR_BUFFER_BIT, GL_LINEAR);
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for (int i = 0; i < fbo.size() - 1; ++i)
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fbo[i]->blit(0, fbo[i + 1]->id(), 0, fbo[i]->rect(), fbo[i + 1]->rect(), GL_COLOR_BUFFER_BIT, GL_LINEAR);
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}
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