--- /dev/null
+/*
+ * GStreamer
+ * Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gstglfilter.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#define GST_TYPE_GL_PIXBUFOVERLAY (gst_gl_pixbufoverlay_get_type())
+#define GST_GL_PIXBUFOVERLAY(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_GL_PIXBUFOVERLAY,GstGLPixbufOverlay))
+#define GST_IS_GL_PIXBUFOVERLAY(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_GL_PIXBUFOVERLAY))
+#define GST_GL_PIXBUFOVERLAY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) , GST_TYPE_GL_PIXBUFOVERLAY,GstGLPixbufOverlayClass))
+#define GST_IS_GL_PIXBUFOVERLAY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) , GST_TYPE_GL_PIXBUFOVERLAY))
+#define GST_GL_PIXBUFOVERLAY_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) , GST_TYPE_GL_PIXBUFOVERLAY,GstGLPixbufOverlayClass))
+
+struct _GstGLPixbufOverlay
+{
+ GstGLFilter filter;
+
+ GstGLShader *shader;
+
+ gchar *location;
+ gboolean pbuf_has_changed;
+
+ GdkPixbuf *pixbuf;
+ GLuint pbuftexture;
+};
+
+struct _GstGLPixbufOverlayClass
+{
+ GstGLFilterClass filter_class;
+};
+
+typedef struct _GstGLPixbufOverlay GstGLPixbufOverlay;
+typedef struct _GstGLPixbufOverlayClass GstGLPixbufOverlayClass;
+
+#define GST_CAT_DEFAULT gst_gl_pixbufoverlay_debug
+GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
+
+#define DEBUG_INIT(bla) \
+ GST_DEBUG_CATEGORY_INIT (gst_gl_pixbufoverlay_debug, "glpixbufoverlay", 0, "glpixbufoverlay element");
+
+GST_BOILERPLATE_FULL (GstGLPixbufOverlay, gst_gl_pixbufoverlay, GstGLFilter,
+ GST_TYPE_GL_FILTER, DEBUG_INIT);
+
+static void gst_gl_pixbufoverlay_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+static void gst_gl_pixbufoverlay_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+
+static void gst_gl_pixbufoverlay_init_resources (GstGLFilter* filter);
+static void gst_gl_pixbufoverlay_reset_resources (GstGLFilter* filter);
+
+static gboolean gst_gl_pixbufoverlay_filter (GstGLFilter * filter,
+ GstGLBuffer * inbuf, GstGLBuffer * outbuf);
+
+static const GstElementDetails element_details = GST_ELEMENT_DETAILS (
+ "Gstreamer OpenGL PixbufOverlay",
+ "Filter/Effect",
+ "Overlay GL video texture with a gdkpixbuf",
+ "Filippo Argiolas <filippo.argiolas@gmail.com>");
+
+static const gchar *interpolate_fragment_source =
+ "#extension GL_ARB_texture_rectangle : enable\n"
+ "uniform sampler2DRect base;"
+ "uniform sampler2DRect blend;"
+ "void main () {"
+ "vec4 basecolor = texture2DRect (base, gl_TexCoord[0].st);"
+ "vec4 blendcolor = texture2DRect (blend, gl_TexCoord[0].st);"
+ "vec4 white = vec4(1.0);"
+ "gl_FragColor = blendcolor + (1 - blendcolor.a) * basecolor;"
+ "}";
+
+enum
+{
+ PROP_0,
+ PROP_LOCATION,
+ /* future properties? */
+ /* PROP_STRETCH, */
+ /* PROP_WIDTH, */
+ /* PROP_HEIGHT, */
+ /* PROP_XPOS, */
+ /* PROP_YPOS */
+};
+
+
+/* init resources that need a gl context */
+static void
+gst_gl_pixbufoverlay_init_gl_resources (GstGLFilter *filter)
+{
+ GstGLPixbufOverlay *pixbufoverlay = GST_GL_PIXBUFOVERLAY (filter);
+
+ pixbufoverlay->shader = gst_gl_shader_new ();
+
+ g_return_if_fail (
+ gst_gl_shader_compile_and_check (pixbufoverlay->shader, interpolate_fragment_source,
+ GST_GL_SHADER_FRAGMENT_SOURCE));
+}
+
+/* free resources that need a gl context */
+static void
+gst_gl_pixbufoverlay_reset_gl_resources (GstGLFilter *filter)
+{
+ GstGLPixbufOverlay *pixbufoverlay = GST_GL_PIXBUFOVERLAY (filter);
+
+ glDeleteTextures (1, &pixbufoverlay->pbuftexture);
+ g_object_unref (pixbufoverlay->shader);
+}
+
+static void
+gst_gl_pixbufoverlay_base_init (gpointer klass)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+ gst_element_class_set_details (element_class, &element_details);
+}
+
+static void
+gst_gl_pixbufoverlay_class_init (GstGLPixbufOverlayClass * klass)
+{
+ GObjectClass *gobject_class;
+
+ gobject_class = (GObjectClass *) klass;
+ gobject_class->set_property = gst_gl_pixbufoverlay_set_property;
+ gobject_class->get_property = gst_gl_pixbufoverlay_get_property;
+
+ GST_GL_FILTER_CLASS (klass)->filter = gst_gl_pixbufoverlay_filter;
+ GST_GL_FILTER_CLASS (klass)->display_init_cb = gst_gl_pixbufoverlay_init_gl_resources;
+ GST_GL_FILTER_CLASS (klass)->display_reset_cb = gst_gl_pixbufoverlay_reset_gl_resources;
+ GST_GL_FILTER_CLASS (klass)->onStart = gst_gl_pixbufoverlay_init_resources;
+ GST_GL_FILTER_CLASS (klass)->onStop = gst_gl_pixbufoverlay_reset_resources;
+
+ g_object_class_install_property (gobject_class,
+ PROP_LOCATION,
+ g_param_spec_string ("location",
+ "Location of the image",
+ "Location of the image",
+ NULL, G_PARAM_READWRITE));
+}
+
+void
+gst_gl_pixbufoverlay_draw_texture (GstGLPixbufOverlay * pixbufoverlay, GLuint tex)
+{
+ GstGLFilter *filter = GST_GL_FILTER (pixbufoverlay);
+
+ glActiveTexture (GL_TEXTURE0);
+ glEnable (GL_TEXTURE_RECTANGLE_ARB);
+ glBindTexture (GL_TEXTURE_RECTANGLE_ARB, tex);
+
+ glBegin (GL_QUADS);
+
+ glTexCoord2f (0.0, 0.0);
+ glVertex2f (-1.0, -1.0);
+ glTexCoord2f (filter->width, 0.0);
+ glVertex2f (1.0, -1.0);
+ glTexCoord2f (filter->width, filter->height);
+ glVertex2f (1.0, 1.0);
+ glTexCoord2f (0.0, filter->height);
+ glVertex2f (-1.0, 1.0);
+
+ glEnd ();
+}
+
+static void
+gst_gl_pixbufoverlay_init (GstGLPixbufOverlay * pixbufoverlay,
+ GstGLPixbufOverlayClass * klass)
+{
+ pixbufoverlay->shader = NULL;
+ pixbufoverlay->location = NULL;
+ pixbufoverlay->pixbuf = NULL;
+ pixbufoverlay->pbuftexture = 0;
+ pixbufoverlay->pbuf_has_changed = FALSE;
+}
+
+static void
+gst_gl_pixbufoverlay_reset_resources (GstGLFilter* filter)
+{
+// GstGLPixbufOverlay* pixbufoverlay = GST_GL_PIXBUFOVERLAY(filter);
+}
+
+static void
+gst_gl_pixbufoverlay_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstGLPixbufOverlay *pixbufoverlay = GST_GL_PIXBUFOVERLAY (object);
+
+ switch (prop_id) {
+ case PROP_LOCATION:
+ if (pixbufoverlay->location != NULL) g_free (pixbufoverlay->location);
+ g_message ("\nHEERE\n");
+ pixbufoverlay->pbuf_has_changed = TRUE;
+ pixbufoverlay->location = g_value_dup_string (value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_gl_pixbufoverlay_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstGLPixbufOverlay *pixbufoverlay = GST_GL_PIXBUFOVERLAY (object);
+
+ switch (prop_id) {
+ case PROP_LOCATION:
+ g_value_set_string (value, pixbufoverlay->location);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_gl_pixbufoverlay_init_resources (GstGLFilter* filter)
+{
+// GstGLPixbufOverlay *pixbufoverlay = GST_GL_PIXBUFOVERLAY (filter);
+}
+
+static void
+gst_gl_pixbufoverlay_callback (gint width, gint height, guint texture, gpointer stuff)
+{
+ GstGLPixbufOverlay* pixbufoverlay = GST_GL_PIXBUFOVERLAY (stuff);
+
+ glMatrixMode (GL_PROJECTION);
+ glLoadIdentity ();
+
+ gst_gl_shader_use (pixbufoverlay->shader);
+
+ glActiveTexture (GL_TEXTURE0);
+ glEnable (GL_TEXTURE_RECTANGLE_ARB);
+ glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
+ glDisable(GL_TEXTURE_RECTANGLE_ARB);
+
+ gst_gl_shader_set_uniform_1i (pixbufoverlay->shader, "base", 0);
+
+ glActiveTexture (GL_TEXTURE3);
+ glEnable (GL_TEXTURE_RECTANGLE_ARB);
+ glBindTexture (GL_TEXTURE_RECTANGLE_ARB, pixbufoverlay->pbuftexture);
+ glDisable (GL_TEXTURE_RECTANGLE_ARB);
+
+ gst_gl_shader_set_uniform_1i (pixbufoverlay->shader, "blend", 3);
+
+ gst_gl_pixbufoverlay_draw_texture (pixbufoverlay, texture);
+}
+
+static void init_pixbuf_texture (GstGLDisplay *display, gpointer data)
+{
+ GstGLPixbufOverlay *pixbufoverlay = GST_GL_PIXBUFOVERLAY (data);
+ GstGLFilter *filter = GST_GL_FILTER (data);
+
+ glDeleteTextures (1, &pixbufoverlay->pbuftexture);
+ glGenTextures (1, &pixbufoverlay->pbuftexture);
+ glBindTexture (GL_TEXTURE_RECTANGLE_ARB, pixbufoverlay->pbuftexture);
+ glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA,
+ filter->width, filter->height, 0,
+ gdk_pixbuf_get_has_alpha (pixbufoverlay->pixbuf) ? GL_RGBA : GL_RGB,
+ GL_UNSIGNED_BYTE, gdk_pixbuf_get_pixels (pixbufoverlay->pixbuf));
+}
+
+static gboolean
+gst_gl_pixbufoverlay_filter (GstGLFilter* filter, GstGLBuffer* inbuf,
+ GstGLBuffer* outbuf)
+{
+ GstGLPixbufOverlay* pixbufoverlay = GST_GL_PIXBUFOVERLAY(filter);
+ GdkPixbuf *pixbuf;
+ GError *error = NULL;
+
+ if (pixbufoverlay->pbuf_has_changed && (pixbufoverlay->location != NULL)) {
+ g_message ("RECEIVED: %s", pixbufoverlay->location);
+
+ pixbuf = gdk_pixbuf_new_from_file (pixbufoverlay->location, &error);
+ if (pixbuf) {
+ pixbufoverlay->pixbuf = gdk_pixbuf_scale_simple (pixbuf,
+ filter->width,
+ filter->height,
+ GDK_INTERP_BILINEAR);
+ gdk_pixbuf_unref (pixbuf);
+ if (pixbufoverlay->pixbuf != NULL) {
+ gst_gl_display_thread_add (filter->display, init_pixbuf_texture, pixbufoverlay);
+ gdk_pixbuf_unref (pixbufoverlay->pixbuf);
+ }
+ } else {
+ if (error != NULL && error->message != NULL)
+ g_warning ("unable to load %s: %s", pixbufoverlay->location, error->message);
+ }
+ pixbufoverlay->pbuf_has_changed = FALSE;
+ }
+
+ gst_gl_filter_render_to_target (filter, inbuf->texture, outbuf->texture,
+ gst_gl_pixbufoverlay_callback, pixbufoverlay);
+
+ return TRUE;
+}
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