--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/demos/boxes/glbuffers.h Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,364 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the demonstration applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef GLBUFFERS_H
+#define GLBUFFERS_H
+
+//#include <GL/glew.h>
+#include "glextensions.h"
+
+#include <QtGui>
+#include <QtOpenGL>
+
+#define BUFFER_OFFSET(i) ((char*)0 + (i))
+#define SIZE_OF_MEMBER(cls, member) sizeof(static_cast<cls *>(0)->member)
+
+#define GLBUFFERS_ASSERT_OPENGL(prefix, assertion, returnStatement) \
+if (m_failed || !(assertion)) { \
+ if (!m_failed) qCritical(prefix ": The necessary OpenGL functions are not available."); \
+ m_failed = true; \
+ returnStatement; \
+}
+
+QT_BEGIN_NAMESPACE
+class QMatrix4x4;
+QT_END_NAMESPACE
+
+class GLTexture
+{
+public:
+ GLTexture();
+ virtual ~GLTexture();
+ virtual void bind() = 0;
+ virtual void unbind() = 0;
+ virtual bool failed() const {return m_failed;}
+protected:
+ GLuint m_texture;
+ bool m_failed;
+};
+
+class GLFrameBufferObject
+{
+public:
+ friend class GLRenderTargetCube;
+ // friend class GLRenderTarget2D;
+
+ GLFrameBufferObject(int width, int height);
+ virtual ~GLFrameBufferObject();
+ bool isComplete();
+ virtual bool failed() const {return m_failed;}
+protected:
+ void setAsRenderTarget(bool state = true);
+ GLuint m_fbo;
+ GLuint m_depthBuffer;
+ int m_width, m_height;
+ bool m_failed;
+};
+
+class GLTexture2D : public GLTexture
+{
+public:
+ GLTexture2D(int width, int height);
+ GLTexture2D(const QString& fileName, int width = 0, int height = 0);
+ void load(int width, int height, QRgb *data);
+ virtual void bind();
+ virtual void unbind();
+};
+
+class GLTexture3D : public GLTexture
+{
+public:
+ GLTexture3D(int width, int height, int depth);
+ // TODO: Implement function below
+ //GLTexture3D(const QString& fileName, int width = 0, int height = 0);
+ void load(int width, int height, int depth, QRgb *data);
+ virtual void bind();
+ virtual void unbind();
+};
+
+class GLTextureCube : public GLTexture
+{
+public:
+ GLTextureCube(int size);
+ GLTextureCube(const QStringList& fileNames, int size = 0);
+ void load(int size, int face, QRgb *data);
+ virtual void bind();
+ virtual void unbind();
+};
+
+// TODO: Define and implement class below
+//class GLRenderTarget2D : public GLTexture2D
+
+class GLRenderTargetCube : public GLTextureCube
+{
+public:
+ GLRenderTargetCube(int size);
+ // begin rendering to one of the cube's faces. 0 <= face < 6
+ void begin(int face);
+ // end rendering
+ void end();
+ virtual bool failed() {return m_failed || m_fbo.failed();}
+
+ static void getViewMatrix(QMatrix4x4& mat, int face);
+ static void getProjectionMatrix(QMatrix4x4& mat, float nearZ, float farZ);
+private:
+ GLFrameBufferObject m_fbo;
+};
+
+struct VertexDescription
+{
+ enum
+ {
+ Null = 0, // Terminates a VertexDescription array
+ Position,
+ TexCoord,
+ Normal,
+ Color,
+ };
+ int field; // Position, TexCoord, Normal, Color
+ int type; // GL_FLOAT, GL_UNSIGNED_BYTE
+ int count; // number of elements
+ int offset; // field's offset into vertex struct
+ int index; // 0 (unused at the moment)
+};
+
+// Implementation of interleaved buffers.
+// 'T' is a struct which must include a null-terminated static array
+// 'VertexDescription* description'.
+// Example:
+/*
+struct Vertex
+{
+ GLfloat position[3];
+ GLfloat texCoord[2];
+ GLfloat normal[3];
+ GLbyte color[4];
+ static VertexDescription description[];
+};
+
+VertexDescription Vertex::description[] = {
+ {VertexDescription::Position, GL_FLOAT, SIZE_OF_MEMBER(Vertex, position) / sizeof(GLfloat), offsetof(Vertex, position), 0},
+ {VertexDescription::TexCoord, GL_FLOAT, SIZE_OF_MEMBER(Vertex, texCoord) / sizeof(GLfloat), offsetof(Vertex, texCoord), 0},
+ {VertexDescription::Normal, GL_FLOAT, SIZE_OF_MEMBER(Vertex, normal) / sizeof(GLfloat), offsetof(Vertex, normal), 0},
+ {VertexDescription::Color, GL_BYTE, SIZE_OF_MEMBER(Vertex, color) / sizeof(GLbyte), offsetof(Vertex, color), 0},
+ {VertexDescription::Null, 0, 0, 0, 0},
+};
+*/
+template<class T>
+class GLVertexBuffer
+{
+public:
+ GLVertexBuffer(int length, const T *data = 0, int mode = GL_STATIC_DRAW)
+ : m_length(0)
+ , m_mode(mode)
+ , m_buffer(0)
+ , m_failed(false)
+ {
+ GLBUFFERS_ASSERT_OPENGL("GLVertexBuffer::GLVertexBuffer", glGenBuffers && glBindBuffer && glBufferData, return)
+
+ glGenBuffers(1, &m_buffer);
+ glBindBuffer(GL_ARRAY_BUFFER, m_buffer);
+ glBufferData(GL_ARRAY_BUFFER, (m_length = length) * sizeof(T), data, mode);
+ }
+
+ ~GLVertexBuffer()
+ {
+ GLBUFFERS_ASSERT_OPENGL("GLVertexBuffer::~GLVertexBuffer", glDeleteBuffers, return)
+
+ glDeleteBuffers(1, &m_buffer);
+ }
+
+ void bind()
+ {
+ GLBUFFERS_ASSERT_OPENGL("GLVertexBuffer::bind", glBindBuffer, return)
+
+ glBindBuffer(GL_ARRAY_BUFFER, m_buffer);
+ for (VertexDescription *desc = T::description; desc->field != VertexDescription::Null; ++desc) {
+ switch (desc->field) {
+ case VertexDescription::Position:
+ glVertexPointer(desc->count, desc->type, sizeof(T), BUFFER_OFFSET(desc->offset));
+ glEnableClientState(GL_VERTEX_ARRAY);
+ break;
+ case VertexDescription::TexCoord:
+ glTexCoordPointer(desc->count, desc->type, sizeof(T), BUFFER_OFFSET(desc->offset));
+ glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+ break;
+ case VertexDescription::Normal:
+ glNormalPointer(desc->type, sizeof(T), BUFFER_OFFSET(desc->offset));
+ glEnableClientState(GL_NORMAL_ARRAY);
+ break;
+ case VertexDescription::Color:
+ glColorPointer(desc->count, desc->type, sizeof(T), BUFFER_OFFSET(desc->offset));
+ glEnableClientState(GL_COLOR_ARRAY);
+ break;
+ default:
+ break;
+ }
+ }
+ }
+
+ void unbind()
+ {
+ GLBUFFERS_ASSERT_OPENGL("GLVertexBuffer::unbind", glBindBuffer, return)
+
+ glBindBuffer(GL_ARRAY_BUFFER, 0);
+ for (VertexDescription *desc = T::description; desc->field != VertexDescription::Null; ++desc) {
+ switch (desc->field) {
+ case VertexDescription::Position:
+ glDisableClientState(GL_VERTEX_ARRAY);
+ break;
+ case VertexDescription::TexCoord:
+ glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+ break;
+ case VertexDescription::Normal:
+ glDisableClientState(GL_NORMAL_ARRAY);
+ break;
+ case VertexDescription::Color:
+ glDisableClientState(GL_COLOR_ARRAY);
+ break;
+ default:
+ break;
+ }
+ }
+ }
+
+ int length() const {return m_length;}
+
+ T *lock()
+ {
+ GLBUFFERS_ASSERT_OPENGL("GLVertexBuffer::lock", glBindBuffer && glMapBuffer, return 0)
+
+ glBindBuffer(GL_ARRAY_BUFFER, m_buffer);
+ //glBufferData(GL_ARRAY_BUFFER, m_length, NULL, m_mode);
+ GLvoid* buffer = glMapBuffer(GL_ARRAY_BUFFER, GL_READ_WRITE);
+ m_failed = (buffer == 0);
+ return reinterpret_cast<T *>(buffer);
+ }
+
+ void unlock()
+ {
+ GLBUFFERS_ASSERT_OPENGL("GLVertexBuffer::unlock", glBindBuffer && glUnmapBuffer, return)
+
+ glBindBuffer(GL_ARRAY_BUFFER, m_buffer);
+ glUnmapBuffer(GL_ARRAY_BUFFER);
+ }
+
+ bool failed()
+ {
+ return m_failed;
+ }
+
+private:
+ int m_length, m_mode;
+ GLuint m_buffer;
+ bool m_failed;
+};
+
+template<class T>
+class GLIndexBuffer
+{
+public:
+ GLIndexBuffer(int length, const T *data = 0, int mode = GL_STATIC_DRAW)
+ : m_length(0)
+ , m_mode(mode)
+ , m_buffer(0)
+ , m_failed(false)
+ {
+ GLBUFFERS_ASSERT_OPENGL("GLIndexBuffer::GLIndexBuffer", glGenBuffers && glBindBuffer && glBufferData, return)
+
+ glGenBuffers(1, &m_buffer);
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_buffer);
+ glBufferData(GL_ELEMENT_ARRAY_BUFFER, (m_length = length) * sizeof(T), data, mode);
+ }
+
+ ~GLIndexBuffer()
+ {
+ GLBUFFERS_ASSERT_OPENGL("GLIndexBuffer::~GLIndexBuffer", glDeleteBuffers, return)
+
+ glDeleteBuffers(1, &m_buffer);
+ }
+
+ void bind()
+ {
+ GLBUFFERS_ASSERT_OPENGL("GLIndexBuffer::bind", glBindBuffer, return)
+
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_buffer);
+ }
+
+ void unbind()
+ {
+ GLBUFFERS_ASSERT_OPENGL("GLIndexBuffer::unbind", glBindBuffer, return)
+
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+ }
+
+ int length() const {return m_length;}
+
+ T *lock()
+ {
+ GLBUFFERS_ASSERT_OPENGL("GLIndexBuffer::lock", glBindBuffer && glMapBuffer, return 0)
+
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_buffer);
+ GLvoid* buffer = glMapBuffer(GL_ELEMENT_ARRAY_BUFFER, GL_READ_WRITE);
+ m_failed = (buffer == 0);
+ return reinterpret_cast<T *>(buffer);
+ }
+
+ void unlock()
+ {
+ GLBUFFERS_ASSERT_OPENGL("GLIndexBuffer::unlock", glBindBuffer && glUnmapBuffer, return)
+
+ glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_buffer);
+ glUnmapBuffer(GL_ELEMENT_ARRAY_BUFFER);
+ }
+
+ bool failed()
+ {
+ return m_failed;
+ }
+
+private:
+ int m_length, m_mode;
+ GLuint m_buffer;
+ bool m_failed;
+};
+
+#endif