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39
40#ifndef QOPENGLFRAMEBUFFEROBJECT_P_H
41#define QOPENGLFRAMEBUFFEROBJECT_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 <QtGui/private/qtguiglobal_p.h>
55#include <qopenglframebufferobject.h>
56#include <private/qopenglcontext_p.h>
57#include <private/qopenglextensions_p.h>
58
59QT_BEGIN_NAMESPACE
60
61class QOpenGLFramebufferObjectFormatPrivate
62{
63public:
64 QOpenGLFramebufferObjectFormatPrivate()
65 : ref(1),
66 samples(0),
67 attachment(QOpenGLFramebufferObject::NoAttachment),
68 target(GL_TEXTURE_2D),
69 mipmap(false)
70 {
71#ifndef QT_OPENGL_ES_2
72 // There is nothing that says QOpenGLFramebufferObjectFormat needs a current
73 // context, so we need a fallback just to be safe, even though in pratice there
74 // will usually be a context current.
75 QOpenGLContext *ctx = QOpenGLContext::currentContext();
76 const bool isES = ctx ? ctx->isOpenGLES() : QOpenGLContext::openGLModuleType() != QOpenGLContext::LibGL;
77 internal_format = isES ? GL_RGBA : GL_RGBA8;
78#else
79 internal_format = GL_RGBA;
80#endif
81 }
82 QOpenGLFramebufferObjectFormatPrivate
83 (const QOpenGLFramebufferObjectFormatPrivate *other)
84 : ref(1),
85 samples(other->samples),
86 attachment(other->attachment),
87 target(other->target),
88 internal_format(other->internal_format),
89 mipmap(other->mipmap)
90 {
91 }
92 bool equals(const QOpenGLFramebufferObjectFormatPrivate *other)
93 {
94 return samples == other->samples &&
95 attachment == other->attachment &&
96 target == other->target &&
97 internal_format == other->internal_format &&
98 mipmap == other->mipmap;
99 }
100
101 QAtomicInt ref;
102 int samples;
103 QOpenGLFramebufferObject::Attachment attachment;
104 GLenum target;
105 GLenum internal_format;
106 uint mipmap : 1;
107};
108
109class QOpenGLFramebufferObjectPrivate
110{
111public:
112 QOpenGLFramebufferObjectPrivate() : fbo_guard(nullptr), depth_buffer_guard(nullptr)
113 , stencil_buffer_guard(nullptr)
114 , valid(false) {}
115 ~QOpenGLFramebufferObjectPrivate() {}
116
117 void init(QOpenGLFramebufferObject *q, const QSize &size,
118 QOpenGLFramebufferObject::Attachment attachment,
119 GLenum texture_target, GLenum internal_format,
120 GLint samples = 0, bool mipmap = false);
121 void initTexture(int idx);
122 void initColorBuffer(int idx, GLint *samples);
123 void initDepthStencilAttachments(QOpenGLContext *ctx, QOpenGLFramebufferObject::Attachment attachment);
124
125 bool checkFramebufferStatus(QOpenGLContext *ctx) const;
126 QOpenGLSharedResourceGuard *fbo_guard;
127 QOpenGLSharedResourceGuard *depth_buffer_guard;
128 QOpenGLSharedResourceGuard *stencil_buffer_guard;
129 GLenum target;
130 QSize dsSize;
131 QOpenGLFramebufferObjectFormat format;
132 int requestedSamples;
133 uint valid : 1;
134 QOpenGLFramebufferObject::Attachment fbo_attachment;
135 QOpenGLExtensions funcs;
136
137 struct ColorAttachment {
138 ColorAttachment() : internalFormat(0), guard(nullptr) { }
139 ColorAttachment(const QSize &size, GLenum internalFormat)
140 : size(size), internalFormat(internalFormat), guard(nullptr) { }
141 QSize size;
142 GLenum internalFormat;
143 QOpenGLSharedResourceGuard *guard;
144 };
145 QVector<ColorAttachment> colorAttachments;
146
147 inline GLuint fbo() const { return fbo_guard ? fbo_guard->id() : 0; }
148};
149
150
151QT_END_NAMESPACE
152
153#endif // QOPENGLFRAMEBUFFEROBJECT_P_H
154