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.
128 void QtCamViewfinderRendererMeeGo::reset() {
129 QMutexLocker locker(&m_frameMutex);
133 GstElement *QtCamViewfinderRendererMeeGo::sinkElement() {
134 if (!QGLContext::currentContext()) {
135 qCritical() << "Cannot create the GStreamer element without an OpenGL context.";
140 m_sink = gst_element_factory_make(m_conf->viewfinderSink().toAscii().data(),
141 "QtCamViewfinderRendererMeeGoSink");
143 qCritical() << "Failed to create" << m_conf->viewfinderSink();
147 g_object_add_toggle_ref(G_OBJECT(m_sink), (GToggleNotify)sink_notify, this);
150 // Displa can be replaced with a null pointer.
151 // We all know that the sink used for Harmattan ignores the x-display property ;-)
153 Display *d = QX11Info::display();
154 g_object_set(G_OBJECT(m_sink), "x-display", d, "use-framebuffer-memory", TRUE, NULL);
156 EGLDisplay dpy = eglGetDisplay((EGLNativeDisplayType)d);
157 EGLContext context = eglGetCurrentContext();
159 g_object_set(G_OBJECT(m_sink), "egl-display", dpy, "egl-context", context, NULL);
161 m_id = g_signal_connect(G_OBJECT(m_sink), "frame-ready", G_CALLBACK(frame_ready), this);
163 GstPad *pad = gst_element_get_static_pad(m_sink, "sink");
164 m_notify = g_signal_connect(G_OBJECT(pad), "notify::caps",
165 G_CALLBACK(sink_caps_changed), this);
166 gst_object_unref(pad);
171 void QtCamViewfinderRendererMeeGo::frame_ready(GstElement *sink, int frame,
172 QtCamViewfinderRendererMeeGo *r) {
176 r->m_frameMutex.lock();
178 r->m_frameMutex.unlock();
180 QMetaObject::invokeMethod(r, "updateRequested", Qt::QueuedConnection);
183 void QtCamViewfinderRendererMeeGo::sink_notify(QtCamViewfinderRendererMeeGo *q,
184 GObject *object, gboolean is_last_ref) {
189 g_signal_handler_disconnect(q->m_sink, q->m_id);
190 g_object_remove_toggle_ref(G_OBJECT(q->m_sink), (GToggleNotify)sink_notify, q);
195 void QtCamViewfinderRendererMeeGo::sink_caps_changed(GObject *obj, GParamSpec *pspec,
196 QtCamViewfinderRendererMeeGo *q) {
201 if (obj && gst_video_get_size (GST_PAD(obj), &width, &height)) {
202 QMetaObject::invokeMethod(q, "setVideoSize", Qt::QueuedConnection,
203 Q_ARG(QSizeF, QSizeF(width, height)));
207 void QtCamViewfinderRendererMeeGo::calculateProjectionMatrix(const QRectF& rect) {
208 m_projectionMatrix = QMatrix4x4();
209 m_projectionMatrix.ortho(rect);
212 void QtCamViewfinderRendererMeeGo::createProgram() {
217 m_program = new QGLShaderProgram(this);
219 if (!m_program->addShaderFromSourceCode(QGLShader::Vertex, VERTEX_SHADER)) {
220 qCritical() << "Failed to add vertex shader";
224 if (!m_program->addShaderFromSourceCode(QGLShader::Fragment, FRAGMENT_SHADER)) {
225 qCritical() << "Failed to add fragment shader";
229 m_program->bindAttributeLocation("inputVertex", 0);
230 m_program->bindAttributeLocation("textureCoord", 1);
232 if (!m_program->link()) {
233 qCritical() << "Failed to link program!";
237 if (!m_program->bind()) {
238 qCritical() << "Failed to bind program";
242 m_program->setUniformValue("texture0", 0); // texture UNIT 0
243 m_program->release();
246 void QtCamViewfinderRendererMeeGo::paintFrame(QPainter *painter, int frame) {
251 // TODO: sometimes there is an assertion.
253 MeegoGstVideoTexture *sink = MEEGO_GST_VIDEO_TEXTURE(m_sink);
254 if (!meego_gst_video_texture_acquire_frame(sink, frame)) {
255 qDebug() << "Failed to acquire frame";
261 m_program->setUniformValue("matrix", m_projectionMatrix);
262 m_program->setUniformValue("matrixWorld", QMatrix4x4(painter->combinedTransform()));
264 if (!meego_gst_video_texture_bind_frame(sink, GL_TEXTURE_EXTERNAL_OES, frame)) {
265 qDebug() << "Failed to bind frame";
266 m_program->release();
270 glEnableVertexAttribArray(0);
271 glEnableVertexAttribArray(1);
273 glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, &m_vertexCoords);
274 glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 0, &m_texCoords);
276 glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
278 if (!meego_gst_video_texture_bind_frame(sink, GL_TEXTURE_EXTERNAL_OES, -1)) {
279 qDebug() << "Failed to unbind frame";
282 glDisableVertexAttribArray(1);
283 glDisableVertexAttribArray(0);
285 m_program->release();
287 // We are not using fences.
288 // TODO: make it configurable.
289 meego_gst_video_texture_release_frame(sink, frame, 0);
292 void QtCamViewfinderRendererMeeGo::calculateCoords() {
293 if (!m_size.isValid() || !m_videoSize.isValid()) {
297 QRectF area = renderArea();
299 qreal leftMargin = area.x();
300 qreal topMargin = area.y();
301 QSizeF renderSize = area.size();
303 m_vertexCoords[0] = leftMargin;
304 m_vertexCoords[1] = topMargin + renderSize.height();
306 m_vertexCoords[2] = renderSize.width() + leftMargin;
307 m_vertexCoords[3] = topMargin + renderSize.height();
309 m_vertexCoords[4] = renderSize.width() + leftMargin;
310 m_vertexCoords[5] = topMargin;
312 m_vertexCoords[6] = leftMargin;
313 m_vertexCoords[7] = topMargin;
316 QRectF QtCamViewfinderRendererMeeGo::renderArea() {
317 if (!m_renderArea.isNull()) {
321 QSizeF renderSize = m_videoSize;
322 renderSize.scale(m_size, Qt::KeepAspectRatio);
324 qreal leftMargin = (m_size.width() - renderSize.width())/2.0;
325 qreal topMargin = (m_size.height() - renderSize.height())/2.0;
327 m_renderArea = QRectF(QPointF(leftMargin, topMargin), renderSize);
332 void QtCamViewfinderRendererMeeGo::setVideoSize(const QSizeF& size) {
333 if (size == m_videoSize) {
339 m_renderArea = QRectF();