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

qglengine/core/glframebuffer.cpp

@@ -191,7 +191,7 @@ QVector<float> Framebuffer::grabF(int index) const {
 }
 
 
-void Framebuffer::blit(int index_from, GLuint fb_to, int index_to, QRect from, QRect to, GLbitfield mask, GLenum filter) {
+void Framebuffer::blit(int index_from, GLuint fb_to, int index_to, QRect from, QRect to, GLbitfield mask, GLenum filter) const {
 	if (index_from < 0 || index_from >= colors.size()) return;
 	GLenum e = GL_COLOR_ATTACHMENT0 + index_to;
 	f->glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fb_to);

qglengine/core/glframebuffer.h

@@ -24,6 +24,7 @@
 
 class Framebuffer
 {
+	friend class FramebufferMipmap;
 public:
 	Framebuffer(QOpenGLExtraFunctions * f_, int colorAttachments = 1, bool withDepth = true, GLenum colorFormat = GL_RGBA8, GLenum _target = GL_TEXTURE_2D);
 	Framebuffer(QOpenGLExtraFunctions * f_, QVector<GLenum> colors_, bool withDepth = true, GLenum _target = GL_TEXTURE_2D);
@@ -47,7 +48,7 @@ public:
 	QVector<uint> getPoints() const;
 	QImage getImage() const;
 	int queriedPoints() const {return pbo_queried;}
-	void blit(int index_from, GLuint fb_to, int index_to, QRect from, QRect to, GLbitfield mask = GL_COLOR_BUFFER_BIT, GLenum filter = GL_NEAREST);
+	void blit(int index_from, GLuint fb_to, int index_to, QRect from, QRect to, GLbitfield mask = GL_COLOR_BUFFER_BIT, GLenum filter = GL_NEAREST) const;
 
 	void resize(int width, int height, bool force = false);
 	void bind();

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);
+}

qglengine/core/glframebuffer_mipmap.h

@@ -0,0 +1,49 @@
+/*
+    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/>.
+*/
+
+#ifndef GLFRAMEBUFFER_MIPMAP_H
+#define GLFRAMEBUFFER_MIPMAP_H
+
+#include "glframebuffer.h"
+
+
+class FramebufferMipmap
+{
+public:
+	FramebufferMipmap(const Framebuffer & fb, int index_from_, int levels = 2);
+	virtual ~FramebufferMipmap();
+
+	int levelsCount() const {return fbo.size();}
+	int lastLevel() const {return fbo.size() - 1;}
+	Framebuffer & plane(int level) {return *fbo[level];}
+	int width (int level) const {return fbo[level]->wid;}
+	int height(int level) const {return fbo[level]->hei;}
+	QSize size(int level) const {return fbo[level]->size();}
+	QRect rect(int level) const {return fbo[level]->rect();}
+
+	void resize();
+	void create();
+
+private:
+	int index_from;
+	const Framebuffer & src_fb;
+	QVector<Framebuffer*> fbo;
+
+};
+
+#endif // GLFRAMEBUFFER_MIPMAP_H

qglengine/core/gltypes.h

@@ -174,6 +174,8 @@ class Map;
 class Material;
 class TextureManager;
 class Texture2DArray;
+class Framebuffer;
+class FramebufferMipmap;
 class Mesh;
 class Scene;
 class RendererBase;