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39
40#ifndef QGLFRAMEBUFFEROBJECT_P_H
41#define QGLFRAMEBUFFEROBJECT_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists purely as an
48// implementation detail. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include <qglframebufferobject.h>
55#include <private/qglpaintdevice_p.h>
56#include <private/qgl_p.h>
57#include <private/qopenglextensions_p.h>
58
59QT_BEGIN_NAMESPACE
60
61class QGLFramebufferObjectFormatPrivate
62{
63public:
64 QGLFramebufferObjectFormatPrivate()
65 : ref(1),
66 samples(0),
67 attachment(QGLFramebufferObject::NoAttachment),
68 target(GL_TEXTURE_2D),
69 mipmap(false)
70 {
71#ifndef QT_OPENGL_ES_2
72 QOpenGLContext *ctx = QOpenGLContext::currentContext();
73 const bool isES = ctx ? ctx->isOpenGLES() : QOpenGLContext::openGLModuleType() != QOpenGLContext::LibGL;
74 internal_format = isES ? GL_RGBA : GL_RGBA8;
75#else
76 internal_format = GL_RGBA;
77#endif
78 }
79 QGLFramebufferObjectFormatPrivate
80 (const QGLFramebufferObjectFormatPrivate *other)
81 : ref(1),
82 samples(other->samples),
83 attachment(other->attachment),
84 target(other->target),
85 internal_format(other->internal_format),
86 mipmap(other->mipmap)
87 {
88 }
89 bool equals(const QGLFramebufferObjectFormatPrivate *other)
90 {
91 return samples == other->samples &&
92 attachment == other->attachment &&
93 target == other->target &&
94 internal_format == other->internal_format &&
95 mipmap == other->mipmap;
96 }
97
98 QAtomicInt ref;
99 int samples;
100 QGLFramebufferObject::Attachment attachment;
101 GLenum target;
102 GLenum internal_format;
103 uint mipmap : 1;
104};
105
106class QGLFBOGLPaintDevice : public QGLPaintDevice
107{
108public:
109 virtual QPaintEngine* paintEngine() const override {return fbo->paintEngine();}
110 virtual QSize size() const override {return fbo->size();}
111 virtual QGLContext* context() const override;
112 virtual QGLFormat format() const override {return fboFormat;}
113 virtual bool alphaRequested() const override { return reqAlpha; }
114
115 void setFBO(QGLFramebufferObject* f,
116 QGLFramebufferObject::Attachment attachment);
117
118private:
119 QGLFramebufferObject* fbo;
120 QGLFormat fboFormat;
121 bool reqAlpha;
122};
123
124class QGLFramebufferObjectPrivate
125{
126public:
127 QGLFramebufferObjectPrivate() : fbo_guard(nullptr), texture_guard(nullptr), depth_buffer_guard(nullptr)
128 , stencil_buffer_guard(nullptr), color_buffer_guard(nullptr)
129 , valid(false), engine(nullptr) {}
130 ~QGLFramebufferObjectPrivate() {}
131
132 void init(QGLFramebufferObject *q, const QSize& sz,
133 QGLFramebufferObject::Attachment attachment,
134 GLenum internal_format, GLenum texture_target,
135 GLint samples = 0, bool mipmap = false);
136 bool checkFramebufferStatus() const;
137 QGLSharedResourceGuardBase *fbo_guard;
138 QGLSharedResourceGuardBase *texture_guard;
139 QGLSharedResourceGuardBase *depth_buffer_guard;
140 QGLSharedResourceGuardBase *stencil_buffer_guard;
141 QGLSharedResourceGuardBase *color_buffer_guard;
142 GLenum target;
143 QSize size;
144 QGLFramebufferObjectFormat format;
145 uint valid : 1;
146 QGLFramebufferObject::Attachment fbo_attachment;
147 mutable QPaintEngine *engine;
148 QGLFBOGLPaintDevice glDevice;
149 QOpenGLExtensions funcs;
150
151 inline GLuint fbo() const { return fbo_guard ? fbo_guard->id() : 0; }
152};
153
154
155QT_END_NAMESPACE
156
157#endif // QGLFRAMEBUFFEROBJECT_P_H
158