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50
51 #include "fbopaintdevice.h"
52
53 #include <QOffscreenSurface>
54 #include <QOpenGLFunctions>
55
QFboPaintDevice(const QSize & size,bool flipped,bool clearOnInit,QOpenGLFramebufferObject::Attachment attachment)56 QFboPaintDevice::QFboPaintDevice(const QSize &size, bool flipped, bool clearOnInit,
57 QOpenGLFramebufferObject::Attachment attachment)
58 : QOpenGLPaintDevice(size)
59 {
60 QOpenGLFramebufferObjectFormat format;
61 format.setAttachment(attachment);
62 format.setSamples(4);
63 m_framebufferObject = new QOpenGLFramebufferObject(size, format);
64 QOffscreenSurface *surface = new QOffscreenSurface();
65 surface->create();
66 m_surface = surface;
67 setPaintFlipped(flipped);
68 if (clearOnInit) {
69 m_framebufferObject->bind();
70
71 context()->functions()->glClearColor(0, 0, 0, 0);
72 context()->functions()->glClear(GL_COLOR_BUFFER_BIT);
73 }
74 }
75
~QFboPaintDevice()76 QFboPaintDevice::~QFboPaintDevice()
77 {
78 delete m_framebufferObject;
79 delete m_surface;
80 }
81
ensureActiveTarget()82 void QFboPaintDevice::ensureActiveTarget()
83 {
84 if (QOpenGLContext::currentContext() != context())
85 context()->makeCurrent(m_surface);
86
87 m_framebufferObject->bind();
88 }
89
takeTexture()90 GLuint QFboPaintDevice::takeTexture()
91 {
92 // We have multisamples so we can't just forward takeTexture().
93 QOpenGLFramebufferObject resolvedFbo(m_framebufferObject->size(), m_framebufferObject->attachment());
94 QOpenGLFramebufferObject::blitFramebuffer(&resolvedFbo, m_framebufferObject);
95 return resolvedFbo.takeTexture();
96 }
97
toImage() const98 QImage QFboPaintDevice::toImage() const
99 {
100 QOpenGLContext *currentContext = QOpenGLContext::currentContext();
101 QSurface *currentSurface = currentContext ? currentContext->surface() : nullptr;
102
103 context()->makeCurrent(m_surface);
104
105 QImage image = m_framebufferObject->toImage(!paintFlipped());
106
107 if (currentContext)
108 currentContext->makeCurrent(currentSurface);
109 else
110 context()->doneCurrent();
111
112 return image;
113 }
114