effects/gstgleffectssources.h \
effects/gstgleffectidentity.c \
effects/gstgleffectmirror.c \
- effects/gstgleffectsqueeze.c
+ effects/gstgleffectsqueeze.c \
+ effects/gstgleffectstretch.c
# check order of CFLAGS and LIBS, shouldn't the order be the other way around
void gst_gl_effects_identity (GstGLEffects *effects);
void gst_gl_effects_mirror (GstGLEffects *effects);
void gst_gl_effects_squeeze (GstGLEffects *effects);
+void gst_gl_effects_stretch (GstGLEffects *effects);
G_END_DECLS
" gl_FragColor = color * gl_Color;"
"}";
+
+/* Stretch Effect */
+const gchar *stretch_fragment_source =
+"#extension GL_ARB_texture_rectangle : enable\n"
+"uniform sampler2DRect tex;"
+"uniform float width, height;"
+"void main () {"
+" vec2 tex_size = vec2 (width, height);"
+" vec2 texturecoord = gl_TexCoord[0].xy;"
+" vec2 normcoord;"
+" normcoord = texturecoord / tex_size - 1.0;"
+" float r = length (normcoord);"
+" normcoord *= 2.0 - smoothstep(0.0, 0.7, r);"
+" texturecoord = (normcoord + 1.0) * tex_size;"
+" vec4 color = texture2DRect (tex, texturecoord);"
+" gl_FragColor = color * gl_Color;"
+"}";
const gchar *mirror_fragment_source;
const gchar *squeeze_fragment_source;
+const gchar *stretch_fragment_source;
#endif /* __GST_GL_EFFECTS_SOURCES_H__ */
--- /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.
+ */
+
+#include <gstgleffects.h>
+
+static void
+gst_gl_effects_stretch_callback (gint width, gint height, guint texture, gpointer data)
+{
+ GstGLEffects* effects = GST_GL_EFFECTS (data);
+
+ GstGLShader *shader;
+ gfloat tex_size[2];
+
+ shader = g_hash_table_lookup (effects->shaderstable, "stretch0");
+
+ if (!shader) {
+ shader = gst_gl_shader_new ();
+ g_hash_table_insert (effects->shaderstable, "stretch0", shader);
+ }
+
+ g_return_if_fail (
+ gst_gl_shader_compile_and_check (shader, stretch_fragment_source,
+ GST_GL_SHADER_FRAGMENT_SOURCE));
+
+ glMatrixMode (GL_PROJECTION);
+ glLoadIdentity ();
+
+ gst_gl_shader_use (shader);
+
+ glActiveTexture (GL_TEXTURE0);
+ glEnable (GL_TEXTURE_RECTANGLE_ARB);
+ glBindTexture (GL_TEXTURE_RECTANGLE_ARB, texture);
+
+ gst_gl_shader_set_uniform_1i (shader, "tex", 0);
+
+ tex_size[0] = GST_GL_FILTER(effects)->width / 2.0;
+ tex_size[1] = GST_GL_FILTER(effects)->height / 2.0;
+
+ gst_gl_shader_set_uniform_1f (shader, "width", tex_size[0]);
+ gst_gl_shader_set_uniform_1f (shader, "height", tex_size[1]);
+
+ gst_gl_effects_draw_texture (effects, texture);
+}
+
+void
+gst_gl_effects_stretch (GstGLEffects *effects) {
+ GstGLFilter *filter = GST_GL_FILTER (effects);
+
+ gst_gl_filter_render_to_target (filter, effects->intexture, effects->outtexture,
+ gst_gl_effects_stretch_callback, effects);
+}
"GL Shading Language effects",
"Filippo Argiolas <filippo.argiolas@gmail.com>");
-
+/* dont' forget to edit the following when a new effect is added */
typedef enum {
GST_GL_EFFECT_IDENTITY,
GST_GL_EFFECT_MIRROR,
GST_GL_EFFECT_SQUEEZE,
+ GST_GL_EFFECT_STRETCH,
GST_GL_N_EFFECTS
} GstGLEffectsEffect;
{ GST_GL_EFFECT_IDENTITY, "Do nothing Effect", "identity" },
{ GST_GL_EFFECT_MIRROR, "Mirror Effect", "mirror" },
{ GST_GL_EFFECT_SQUEEZE, "Squeeze Effect", "squeeze" },
+ { GST_GL_EFFECT_STRETCH, "Stretch Effect", "stretch" },
{ 0, NULL, NULL }
};
return gl_effects_effect_type;
}
+static void
+gst_gl_effects_set_effect (GstGLEffects *effects, gint effect_type) {
+
+ switch (effect_type) {
+ case GST_GL_EFFECT_IDENTITY:
+ effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_identity;
+ break;
+ case GST_GL_EFFECT_MIRROR:
+ effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_mirror;
+ break;
+ case GST_GL_EFFECT_SQUEEZE:
+ effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_squeeze;
+ break;
+ case GST_GL_EFFECT_STRETCH:
+ effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_stretch;
+ break;
+ default:
+ g_assert_not_reached ();
+ }
+ effects->current_effect = effect_type;
+}
+
/* init resources that need a gl context */
static void
gst_gl_effects_init_gl_resources (GstGLFilter *filter)
glEnd ();
}
-#if 0
-static void
-change_view (GstGLDisplay *display, gpointer data)
-{
-// GstGLEffects *effects = GST_GL_EFFECTS (data);
+/* static void */
+/* set_orizonthal_switch (GstGLDisplay *display, gpointer data) */
+/* { */
+/* // GstGLEffects *effects = GST_GL_EFFECTS (data); */
- const double mirrormatrix[16] = {
- -1.0, 0.0, 0.0, 0.0,
- 0.0, 1.0, 0.0, 0.0,
- 0.0, 0.0, 1.0, 0.0,
- 0.0, 0.0, 0.0, 1.0
- };
+/* const double mirrormatrix[16] = { */
+/* -1.0, 0.0, 0.0, 0.0, */
+/* 0.0, 1.0, 0.0, 0.0, */
+/* 0.0, 0.0, 1.0, 0.0, */
+/* 0.0, 0.0, 0.0, 1.0 */
+/* }; */
- glMatrixMode (GL_MODELVIEW);
- glLoadMatrixd (mirrormatrix);
-}
-#endif
+/* glMatrixMode (GL_MODELVIEW); */
+/* glLoadMatrixd (mirrormatrix); */
+/* } */
static void
gst_gl_effects_init (GstGLEffects * effects, GstGLEffectsClass * klass)
}
static void
-gst_gl_effects_set_effect (GstGLEffects *effects, gint effect_type) {
-
- switch (effect_type) {
- case GST_GL_EFFECT_IDENTITY:
- effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_identity;
- break;
- case GST_GL_EFFECT_MIRROR:
- effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_mirror;
- break;
- case GST_GL_EFFECT_SQUEEZE:
- effects->effect = (GstGLEffectProcessFunc) gst_gl_effects_squeeze;
- break;
- default:
- g_assert_not_reached ();
- }
- effects->current_effect = effect_type;
-}
-
-static void
gst_gl_effects_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{