git-svn-id: svn://db.shs.com.ru/libs@626 a8b55f48-bf90-11e4-a774-851b48703e85

qglengine/glframebuffer.h

@@ -0,0 +1,81 @@
+/*
+    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_H
+#define GLFRAMEBUFFER_H
+
+#include "glbuffer.h"
+
+
+class Framebuffer
+{
+public:
+	Framebuffer(QOpenGLExtraFunctions * f_, int colorAttachments = 1, bool withDepth = true, GLenum colorFormat = GL_RGBA8, GLenum _target = GL_TEXTURE_2D);
+	virtual ~Framebuffer();
+
+	GLuint id() const {return fbo;}
+	GLuint colorTexture(int index = 0) const {return colors[index];}
+	GLenum colorFormat() const {return color_format;}
+	GLuint depthTexture() const {return tex_d;}
+	GLenum target() const {return target_;}
+	int width() const {return wid;}
+	int height() const {return hei;}
+	QSize size() const {return QSize(wid, hei);}
+	QRect rect() const {return QRect(0, 0, wid, hei);}
+	QImage grab() const;
+	QVector<float> grabF(int index) const;
+	void queryPoint(int index, QPoint p);
+	void queryPoints(int index, QRect rect);
+	void queryImage(int index);
+	uint getPoint() const;
+	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 resize(int width, int height, bool force = false);
+	void bind();
+	void release();
+	void setReadBuffer(int index) {glReadBuffer(GL_COLOR_ATTACHMENT0 + index);}
+	void setWriteBuffer(int index);
+	void setWriteBuffers(int * indeces, int count);
+	void setWriteBuffers();
+	void setColorFormat(GLenum format) {color_format = format; is_changed = true;}
+	void enablePixelBuffer();
+
+	void copyDepthFrom(GLuint tex) {;}
+	void bindColorTexture(int index, int channel = 0);
+	void bindColorTextures();
+	void bindDepthTexture(int channel);
+
+private:
+	void deleteGLRenderbuffer(GLuint & drbo);
+	void deleteGLFramebuffer(GLuint & fbo);
+
+	bool is_depth, is_changed;
+	int pbo_queried;
+	QOpenGLExtraFunctions * f;
+	mutable Buffer pbo;
+	QVector<GLuint> colors;
+	GLenum color_format, target_;
+	GLuint fbo, drbo, tex_d;
+	GLint prev_view[4], wid, hei;
+
+};
+
+#endif // GLFRAMEBUFFER_H