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     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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    40 ****************************************************************************/

    41 

    42 #ifndef QGLFRAMEBUFFEROBJECT_P_H

    43 #define QGLFRAMEBUFFEROBJECT_P_H

    44 

    45 //

    46 //  W A R N I N G

    47 //  -------------

    48 //

    49 // This file is not part of the Qt API.  It exists for the convenience

    50 // of the QLibrary class.  This header file may change from

    51 // version to version without notice, or even be removed.

    52 //

    53 // We mean it.

    54 //

    55 

    56 QT_BEGIN_NAMESPACE

    57 

    58 QT_BEGIN_INCLUDE_NAMESPACE

    59 

    60 #include <qglframebufferobject.h>

    61 #include <private/qglpaintdevice_p.h>

    62 #include <private/qgl_p.h>

    63 

    64 QT_END_INCLUDE_NAMESPACE

    65 

    66 #ifndef QT_OPENGL_ES

    67 #define DEFAULT_FORMAT GL_RGBA8

    68 #else

    69 #define DEFAULT_FORMAT GL_RGBA

    70 #endif

    71 

    72 class QGLFramebufferObjectFormatPrivate

    73 {

    74 public:

    75     QGLFramebufferObjectFormatPrivate()

    76         : ref(1),

    77           samples(0),

    78           attachment(QGLFramebufferObject::NoAttachment),

    79           target(GL_TEXTURE_2D),

    80           internal_format(DEFAULT_FORMAT)

    81     {

    82     }

    83     QGLFramebufferObjectFormatPrivate

    84             (const QGLFramebufferObjectFormatPrivate *other)

    85         : ref(1),

    86           samples(other->samples),

    87           attachment(other->attachment),

    88           target(other->target),

    89           internal_format(other->internal_format)

    90     {

    91     }

    92     bool equals(const QGLFramebufferObjectFormatPrivate *other)

    93     {

    94         return samples == other->samples &&

    95                attachment == other->attachment &&

    96                target == other->target &&

    97                internal_format == other->internal_format;

    98     }

    99 

   100     QAtomicInt ref;

   101     int samples;

   102     QGLFramebufferObject::Attachment attachment;

   103     GLenum target;

   104     GLenum internal_format;

   105 };

   106 

   107 class QGLFBOGLPaintDevice : public QGLPaintDevice

   108 {

   109 public:

   110     virtual QPaintEngine* paintEngine() const {return fbo->paintEngine();}

   111     virtual QSize size() const {return fbo->size();}

   112     virtual QGLContext* context() const;

   113     virtual QGLFormat format() const {return fboFormat;}

   114     virtual void ensureActiveTarget();

   115     virtual void beginPaint();

   116     virtual void endPaint();

   117 

   118     void setFBO(QGLFramebufferObject* f,

   119                 QGLFramebufferObject::Attachment attachment);

   120 

   121 private:

   122     bool wasBound;

   123     QGLFramebufferObject* fbo;

   124     QGLFormat fboFormat;

   125 };

   126 

   127 class QGLFramebufferObjectPrivate

   128 {

   129 public:

   130     QGLFramebufferObjectPrivate() : fbo_guard(0), texture(0), depth_stencil_buffer(0), color_buffer(0), valid(false), previous_fbo(0), engine(0) {}

   131     ~QGLFramebufferObjectPrivate() {}

   132 

   133     void init(QGLFramebufferObject *q, const QSize& sz,

   134               QGLFramebufferObject::Attachment attachment,

   135               GLenum internal_format, GLenum texture_target, GLint samples = 0);

   136     bool checkFramebufferStatus() const;

   137     QGLSharedResourceGuard fbo_guard;

   138     GLuint texture;

   139     GLuint depth_stencil_buffer;

   140     GLuint color_buffer;

   141     GLenum target;

   142     QSize size;

   143     QGLFramebufferObjectFormat format;

   144     uint valid : 1;

   145     QGLFramebufferObject::Attachment fbo_attachment;

   146     GLuint previous_fbo;

   147     mutable QPaintEngine *engine;

   148     QGLFBOGLPaintDevice glDevice;

   149 

   150     inline GLuint fbo() const { return fbo_guard.id(); }

   151 };

   152 

   153 

   154 QT_END_NAMESPACE

   155 

   156 #endif // QGLFRAMEBUFFEROBJECT_P_H