5635823e17
As in the past, to avoid rewriting various autotests that contain line-number information, an extra blank line has been inserted at the end of the license text to ensure that this commit does not change the total number of lines in the license header. Change-Id: I311e001373776812699d6efc045b5f742890c689 Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
367 lines
11 KiB
C++
367 lines
11 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/
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**
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** This file is part of the demonstration applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this
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** file. Please review the following information to ensure the GNU Lesser
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** General Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License version 3.0 as published by the Free Software Foundation
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** and appearing in the file LICENSE.GPL included in the packaging of this
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** file. Please review the following information to ensure the GNU General
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** Public License version 3.0 requirements will be met:
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** Other Usage
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef GLBUFFERS_H
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#define GLBUFFERS_H
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//#include <GL/glew.h>
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#include "glextensions.h"
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#include <QtWidgets>
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#include <QtOpenGL>
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#define BUFFER_OFFSET(i) ((char*)0 + (i))
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#define SIZE_OF_MEMBER(cls, member) sizeof(static_cast<cls *>(0)->member)
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#define GLBUFFERS_ASSERT_OPENGL(prefix, assertion, returnStatement) \
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if (m_failed || !(assertion)) { \
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if (!m_failed) qCritical(prefix ": The necessary OpenGL functions are not available."); \
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m_failed = true; \
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returnStatement; \
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}
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void qgluPerspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar);
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QT_BEGIN_NAMESPACE
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class QMatrix4x4;
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QT_END_NAMESPACE
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class GLTexture
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{
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public:
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GLTexture();
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virtual ~GLTexture();
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virtual void bind() = 0;
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virtual void unbind() = 0;
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virtual bool failed() const {return m_failed;}
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protected:
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GLuint m_texture;
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bool m_failed;
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};
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class GLFrameBufferObject
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{
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public:
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friend class GLRenderTargetCube;
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// friend class GLRenderTarget2D;
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GLFrameBufferObject(int width, int height);
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virtual ~GLFrameBufferObject();
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bool isComplete();
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virtual bool failed() const {return m_failed;}
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protected:
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void setAsRenderTarget(bool state = true);
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GLuint m_fbo;
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GLuint m_depthBuffer;
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int m_width, m_height;
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bool m_failed;
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};
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class GLTexture2D : public GLTexture
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{
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public:
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GLTexture2D(int width, int height);
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GLTexture2D(const QString& fileName, int width = 0, int height = 0);
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void load(int width, int height, QRgb *data);
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virtual void bind();
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virtual void unbind();
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};
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class GLTexture3D : public GLTexture
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{
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public:
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GLTexture3D(int width, int height, int depth);
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// TODO: Implement function below
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//GLTexture3D(const QString& fileName, int width = 0, int height = 0);
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void load(int width, int height, int depth, QRgb *data);
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virtual void bind();
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virtual void unbind();
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};
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class GLTextureCube : public GLTexture
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{
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public:
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GLTextureCube(int size);
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GLTextureCube(const QStringList& fileNames, int size = 0);
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void load(int size, int face, QRgb *data);
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virtual void bind();
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virtual void unbind();
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};
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// TODO: Define and implement class below
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//class GLRenderTarget2D : public GLTexture2D
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class GLRenderTargetCube : public GLTextureCube
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{
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public:
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GLRenderTargetCube(int size);
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// begin rendering to one of the cube's faces. 0 <= face < 6
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void begin(int face);
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// end rendering
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void end();
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virtual bool failed() const {return m_failed || m_fbo.failed();}
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static void getViewMatrix(QMatrix4x4& mat, int face);
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static void getProjectionMatrix(QMatrix4x4& mat, float nearZ, float farZ);
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private:
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GLFrameBufferObject m_fbo;
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};
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struct VertexDescription
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{
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enum
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{
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Null = 0, // Terminates a VertexDescription array
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Position,
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TexCoord,
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Normal,
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Color,
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};
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int field; // Position, TexCoord, Normal, Color
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int type; // GL_FLOAT, GL_UNSIGNED_BYTE
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int count; // number of elements
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int offset; // field's offset into vertex struct
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int index; // 0 (unused at the moment)
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};
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// Implementation of interleaved buffers.
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// 'T' is a struct which must include a null-terminated static array
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// 'VertexDescription* description'.
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// Example:
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/*
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struct Vertex
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{
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GLfloat position[3];
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GLfloat texCoord[2];
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GLfloat normal[3];
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GLbyte color[4];
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static VertexDescription description[];
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};
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VertexDescription Vertex::description[] = {
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{VertexDescription::Position, GL_FLOAT, SIZE_OF_MEMBER(Vertex, position) / sizeof(GLfloat), offsetof(Vertex, position), 0},
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{VertexDescription::TexCoord, GL_FLOAT, SIZE_OF_MEMBER(Vertex, texCoord) / sizeof(GLfloat), offsetof(Vertex, texCoord), 0},
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{VertexDescription::Normal, GL_FLOAT, SIZE_OF_MEMBER(Vertex, normal) / sizeof(GLfloat), offsetof(Vertex, normal), 0},
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{VertexDescription::Color, GL_BYTE, SIZE_OF_MEMBER(Vertex, color) / sizeof(GLbyte), offsetof(Vertex, color), 0},
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{VertexDescription::Null, 0, 0, 0, 0},
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};
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*/
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template<class T>
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class GLVertexBuffer
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{
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public:
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GLVertexBuffer(int length, const T *data = 0, int mode = GL_STATIC_DRAW)
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: m_length(0)
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, m_mode(mode)
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, m_buffer(0)
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, m_failed(false)
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{
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GLBUFFERS_ASSERT_OPENGL("GLVertexBuffer::GLVertexBuffer", glGenBuffers && glBindBuffer && glBufferData, return)
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glGenBuffers(1, &m_buffer);
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glBindBuffer(GL_ARRAY_BUFFER, m_buffer);
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glBufferData(GL_ARRAY_BUFFER, (m_length = length) * sizeof(T), data, mode);
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}
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~GLVertexBuffer()
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{
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GLBUFFERS_ASSERT_OPENGL("GLVertexBuffer::~GLVertexBuffer", glDeleteBuffers, return)
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glDeleteBuffers(1, &m_buffer);
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}
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void bind()
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{
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GLBUFFERS_ASSERT_OPENGL("GLVertexBuffer::bind", glBindBuffer, return)
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glBindBuffer(GL_ARRAY_BUFFER, m_buffer);
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for (VertexDescription *desc = T::description; desc->field != VertexDescription::Null; ++desc) {
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switch (desc->field) {
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case VertexDescription::Position:
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glVertexPointer(desc->count, desc->type, sizeof(T), BUFFER_OFFSET(desc->offset));
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glEnableClientState(GL_VERTEX_ARRAY);
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break;
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case VertexDescription::TexCoord:
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glTexCoordPointer(desc->count, desc->type, sizeof(T), BUFFER_OFFSET(desc->offset));
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glEnableClientState(GL_TEXTURE_COORD_ARRAY);
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break;
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case VertexDescription::Normal:
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glNormalPointer(desc->type, sizeof(T), BUFFER_OFFSET(desc->offset));
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glEnableClientState(GL_NORMAL_ARRAY);
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break;
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case VertexDescription::Color:
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glColorPointer(desc->count, desc->type, sizeof(T), BUFFER_OFFSET(desc->offset));
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glEnableClientState(GL_COLOR_ARRAY);
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break;
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default:
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break;
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}
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}
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}
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void unbind()
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{
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GLBUFFERS_ASSERT_OPENGL("GLVertexBuffer::unbind", glBindBuffer, return)
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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for (VertexDescription *desc = T::description; desc->field != VertexDescription::Null; ++desc) {
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switch (desc->field) {
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case VertexDescription::Position:
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glDisableClientState(GL_VERTEX_ARRAY);
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break;
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case VertexDescription::TexCoord:
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glDisableClientState(GL_TEXTURE_COORD_ARRAY);
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break;
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case VertexDescription::Normal:
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glDisableClientState(GL_NORMAL_ARRAY);
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break;
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case VertexDescription::Color:
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glDisableClientState(GL_COLOR_ARRAY);
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break;
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default:
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break;
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}
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}
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}
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int length() const {return m_length;}
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T *lock()
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{
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GLBUFFERS_ASSERT_OPENGL("GLVertexBuffer::lock", glBindBuffer && glMapBuffer, return 0)
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glBindBuffer(GL_ARRAY_BUFFER, m_buffer);
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//glBufferData(GL_ARRAY_BUFFER, m_length, NULL, m_mode);
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GLvoid* buffer = glMapBuffer(GL_ARRAY_BUFFER, GL_READ_WRITE);
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m_failed = (buffer == 0);
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return reinterpret_cast<T *>(buffer);
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}
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void unlock()
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{
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GLBUFFERS_ASSERT_OPENGL("GLVertexBuffer::unlock", glBindBuffer && glUnmapBuffer, return)
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glBindBuffer(GL_ARRAY_BUFFER, m_buffer);
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glUnmapBuffer(GL_ARRAY_BUFFER);
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}
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bool failed()
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{
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return m_failed;
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}
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private:
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int m_length, m_mode;
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GLuint m_buffer;
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bool m_failed;
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};
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template<class T>
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class GLIndexBuffer
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{
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public:
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GLIndexBuffer(int length, const T *data = 0, int mode = GL_STATIC_DRAW)
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: m_length(0)
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, m_mode(mode)
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, m_buffer(0)
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, m_failed(false)
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{
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GLBUFFERS_ASSERT_OPENGL("GLIndexBuffer::GLIndexBuffer", glGenBuffers && glBindBuffer && glBufferData, return)
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glGenBuffers(1, &m_buffer);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_buffer);
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glBufferData(GL_ELEMENT_ARRAY_BUFFER, (m_length = length) * sizeof(T), data, mode);
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}
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~GLIndexBuffer()
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{
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GLBUFFERS_ASSERT_OPENGL("GLIndexBuffer::~GLIndexBuffer", glDeleteBuffers, return)
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glDeleteBuffers(1, &m_buffer);
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}
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void bind()
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{
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GLBUFFERS_ASSERT_OPENGL("GLIndexBuffer::bind", glBindBuffer, return)
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_buffer);
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}
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void unbind()
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{
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GLBUFFERS_ASSERT_OPENGL("GLIndexBuffer::unbind", glBindBuffer, return)
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
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}
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int length() const {return m_length;}
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T *lock()
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{
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GLBUFFERS_ASSERT_OPENGL("GLIndexBuffer::lock", glBindBuffer && glMapBuffer, return 0)
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_buffer);
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GLvoid* buffer = glMapBuffer(GL_ELEMENT_ARRAY_BUFFER, GL_READ_WRITE);
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m_failed = (buffer == 0);
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return reinterpret_cast<T *>(buffer);
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}
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void unlock()
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{
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GLBUFFERS_ASSERT_OPENGL("GLIndexBuffer::unlock", glBindBuffer && glUnmapBuffer, return)
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_buffer);
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glUnmapBuffer(GL_ELEMENT_ARRAY_BUFFER);
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}
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bool failed()
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{
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return m_failed;
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}
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private:
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int m_length, m_mode;
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GLuint m_buffer;
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bool m_failed;
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};
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#endif
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