git-svn-id: svn://db.shs.com.ru/libs@659 a8b55f48-bf90-11e4-a774-851b48703e85

qglengine/core/glframebuffer_mipmap.cpp

@@ -0,0 +1,50 @@
+/*
+    QGLView
+    Copyright (C) 2019  Ivan Pelipenko peri4ko@yandex.ru
+
+    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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <QOpenGLExtraFunctions>
+#include "glframebuffer_mipmap.h"
+#include <QTime>
+
+
+FramebufferMipmap::FramebufferMipmap(const Framebuffer & fb, int index_from_, int levels): src_fb(fb) {
+	index_from = index_from_;
+	for (int i = 0; i < levels; ++i)
+		fbo << new Framebuffer(fb.f, 1, false, fb.color_formats[index_from]);
+}
+
+
+FramebufferMipmap::~FramebufferMipmap() {
+
+}
+
+
+void FramebufferMipmap::resize() {
+	QSize sz = src_fb.size();
+	for (int i = 0; i < fbo.size(); ++i) {
+		sz /= 2;
+		fbo[i]->resize(sz.width(), sz.height());
+	}
+}
+
+
+void FramebufferMipmap::create() {
+	if (fbo.isEmpty()) return;
+	src_fb.blit(index_from, fbo[0]->id(), 0, src_fb.rect(), fbo[0]->rect(), GL_COLOR_BUFFER_BIT, GL_LINEAR);
+	for (int i = 0; i < fbo.size() - 1; ++i)
+		fbo[i]->blit(0, fbo[i + 1]->id(), 0, fbo[i]->rect(), fbo[i + 1]->rect(), GL_COLOR_BUFFER_BIT, GL_LINEAR);
+}