2 * This file is part of CameraPlus.
4 * Copyright (C) 2012 Mohammed Sameer <msameer@foolab.org>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "qtcamviewfinderrenderermeego.h"
23 #include <gst/video/video.h>
25 #include "qtcamconfig.h"
29 #include <QGLShaderProgram>
30 #include <gst/interfaces/meegovideotexture.h>
32 QT_CAM_VIEWFINDER_RENDERER(RENDERER_TYPE_MEEGO, QtCamViewfinderRendererMeeGo);
34 #define GL_TEXTURE_EXTERNAL_OES 0x8060
36 static const QString FRAGMENT_SHADER = ""
37 "#extension GL_OES_EGL_image_external: enable\n"
38 "uniform samplerExternalOES texture0;"
39 "varying lowp vec2 fragTexCoord;"
41 " gl_FragColor = texture2D(texture0, fragTexCoord);"
45 static const QString VERTEX_SHADER = ""
46 "attribute highp vec4 inputVertex;"
47 "attribute lowp vec2 textureCoord;"
48 "uniform highp mat4 matrix;"
49 "uniform highp mat4 matrixWorld;"
50 "varying lowp vec2 fragTexCoord;"
53 " gl_Position = matrix * matrixWorld * inputVertex;"
54 " fragTexCoord = textureCoord;"
58 QtCamViewfinderRendererMeeGo::QtCamViewfinderRendererMeeGo(QtCamConfig *config,
60 QtCamViewfinderRenderer(config, parent),
69 // Texture coordinates:
70 // Reversed because of Qt reversed coordinate system
71 m_texCoords[0] = 0; m_texCoords[1] = 1;
72 m_texCoords[2] = 1; m_texCoords[3] = 1;
73 m_texCoords[4] = 1; m_texCoords[5] = 0;
74 m_texCoords[6] = 0; m_texCoords[7] = 0;
76 bzero(&m_vertexCoords, 8);
79 QtCamViewfinderRendererMeeGo::~QtCamViewfinderRendererMeeGo() {
81 g_signal_handler_disconnect(m_sink, m_id);
82 g_signal_handler_disconnect(m_sink, m_notify);
83 g_object_remove_toggle_ref(G_OBJECT(m_sink), (GToggleNotify)sink_notify, this);
88 void QtCamViewfinderRendererMeeGo::paint(QPainter *painter) {
89 QMutexLocker locker(&m_frameMutex);
94 painter->beginNativePainting();
97 calculateProjectionMatrix(painter->viewport());
102 // Program will be created if needed and will never be deleted even
103 // if attaching the shaders fail.
107 paintFrame(painter, m_frame);
109 painter->endNativePainting();
112 void QtCamViewfinderRendererMeeGo::resize(const QSizeF& size) {
113 if (size == m_size) {
119 m_renderArea = QRectF();
123 // TODO: this will destroy everything
124 // but we need a way to reset the viewport and the transformation matrix only.
127 emit renderAreaChanged();
130 void QtCamViewfinderRendererMeeGo::reset() {
131 QMutexLocker locker(&m_frameMutex);
135 GstElement *QtCamViewfinderRendererMeeGo::sinkElement() {
136 if (!QGLContext::currentContext()) {
137 qCritical() << "Cannot create the GStreamer element without an OpenGL context.";
142 m_sink = gst_element_factory_make(m_conf->viewfinderSink().toAscii().data(),
143 "QtCamViewfinderRendererMeeGoSink");
145 qCritical() << "Failed to create" << m_conf->viewfinderSink();
149 g_object_add_toggle_ref(G_OBJECT(m_sink), (GToggleNotify)sink_notify, this);
152 // Displa can be replaced with a null pointer.
153 // We all know that the sink used for Harmattan ignores the x-display property ;-)
155 Display *d = QX11Info::display();
156 g_object_set(G_OBJECT(m_sink), "x-display", d, "use-framebuffer-memory", TRUE, NULL);
158 EGLDisplay dpy = eglGetDisplay((EGLNativeDisplayType)d);
159 EGLContext context = eglGetCurrentContext();
161 g_object_set(G_OBJECT(m_sink), "egl-display", dpy, "egl-context", context, NULL);
163 m_id = g_signal_connect(G_OBJECT(m_sink), "frame-ready", G_CALLBACK(frame_ready), this);
165 GstPad *pad = gst_element_get_static_pad(m_sink, "sink");
166 m_notify = g_signal_connect(G_OBJECT(pad), "notify::caps",
167 G_CALLBACK(sink_caps_changed), this);
168 gst_object_unref(pad);
173 void QtCamViewfinderRendererMeeGo::frame_ready(GstElement *sink, int frame,
174 QtCamViewfinderRendererMeeGo *r) {
178 r->m_frameMutex.lock();
180 r->m_frameMutex.unlock();
182 QMetaObject::invokeMethod(r, "updateRequested", Qt::QueuedConnection);
185 void QtCamViewfinderRendererMeeGo::sink_notify(QtCamViewfinderRendererMeeGo *q,
186 GObject *object, gboolean is_last_ref) {
191 g_signal_handler_disconnect(q->m_sink, q->m_id);
192 g_object_remove_toggle_ref(G_OBJECT(q->m_sink), (GToggleNotify)sink_notify, q);
197 void QtCamViewfinderRendererMeeGo::sink_caps_changed(GObject *obj, GParamSpec *pspec,
198 QtCamViewfinderRendererMeeGo *q) {
203 if (obj && gst_video_get_size (GST_PAD(obj), &width, &height)) {
204 QMetaObject::invokeMethod(q, "setVideoSize", Qt::QueuedConnection,
205 Q_ARG(QSizeF, QSizeF(width, height)));
209 void QtCamViewfinderRendererMeeGo::calculateProjectionMatrix(const QRectF& rect) {
210 m_projectionMatrix = QMatrix4x4();
211 m_projectionMatrix.ortho(rect);
214 void QtCamViewfinderRendererMeeGo::createProgram() {
219 m_program = new QGLShaderProgram(this);
221 if (!m_program->addShaderFromSourceCode(QGLShader::Vertex, VERTEX_SHADER)) {
222 qCritical() << "Failed to add vertex shader";
226 if (!m_program->addShaderFromSourceCode(QGLShader::Fragment, FRAGMENT_SHADER)) {
227 qCritical() << "Failed to add fragment shader";
231 m_program->bindAttributeLocation("inputVertex", 0);
232 m_program->bindAttributeLocation("textureCoord", 1);
234 if (!m_program->link()) {
235 qCritical() << "Failed to link program!";
239 if (!m_program->bind()) {
240 qCritical() << "Failed to bind program";
244 m_program->setUniformValue("texture0", 0); // texture UNIT 0
245 m_program->release();
248 void QtCamViewfinderRendererMeeGo::paintFrame(QPainter *painter, int frame) {
253 // TODO: sometimes there is an assertion.
255 MeegoGstVideoTexture *sink = MEEGO_GST_VIDEO_TEXTURE(m_sink);
256 if (!meego_gst_video_texture_acquire_frame(sink, frame)) {
257 qDebug() << "Failed to acquire frame";
263 m_program->setUniformValue("matrix", m_projectionMatrix);
264 m_program->setUniformValue("matrixWorld", QMatrix4x4(painter->combinedTransform()));
266 if (!meego_gst_video_texture_bind_frame(sink, GL_TEXTURE_EXTERNAL_OES, frame)) {
267 qDebug() << "Failed to bind frame";
268 m_program->release();
272 glEnableVertexAttribArray(0);
273 glEnableVertexAttribArray(1);
275 glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, &m_vertexCoords);
276 glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 0, &m_texCoords);
278 glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
280 if (!meego_gst_video_texture_bind_frame(sink, GL_TEXTURE_EXTERNAL_OES, -1)) {
281 qDebug() << "Failed to unbind frame";
284 glDisableVertexAttribArray(1);
285 glDisableVertexAttribArray(0);
287 m_program->release();
289 // We are not using fences.
290 // TODO: make it configurable.
291 meego_gst_video_texture_release_frame(sink, frame, 0);
294 void QtCamViewfinderRendererMeeGo::calculateCoords() {
295 if (!m_size.isValid() || !m_videoSize.isValid()) {
299 QRectF area = renderArea();
301 qreal leftMargin = area.x();
302 qreal topMargin = area.y();
303 QSizeF renderSize = area.size();
305 m_vertexCoords[0] = leftMargin;
306 m_vertexCoords[1] = topMargin + renderSize.height();
308 m_vertexCoords[2] = renderSize.width() + leftMargin;
309 m_vertexCoords[3] = topMargin + renderSize.height();
311 m_vertexCoords[4] = renderSize.width() + leftMargin;
312 m_vertexCoords[5] = topMargin;
314 m_vertexCoords[6] = leftMargin;
315 m_vertexCoords[7] = topMargin;
318 QRectF QtCamViewfinderRendererMeeGo::renderArea() {
319 if (!m_renderArea.isNull()) {
323 QSizeF renderSize = m_videoSize;
324 renderSize.scale(m_size, Qt::KeepAspectRatio);
326 qreal leftMargin = (m_size.width() - renderSize.width())/2.0;
327 qreal topMargin = (m_size.height() - renderSize.height())/2.0;
329 m_renderArea = QRectF(QPointF(leftMargin, topMargin), renderSize);
334 void QtCamViewfinderRendererMeeGo::setVideoSize(const QSizeF& size) {
335 if (size == m_videoSize) {
341 m_renderArea = QRectF();
347 emit renderAreaChanged();