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[162/906] import stretch effect from cvs

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Filippo Argiolas 2008-08-14 08:03:49 +02:00 committed by Matthew Waters
parent ebde5b5501
commit e8d27cadf7
6 changed files with 127 additions and 36 deletions
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3
gst/gl/Makefile.am
View file

@ -31,7 +31,8 @@ libgstopengl_la_SOURCES = \
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

1
gst/gl/effects/gstgleffects.h
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@ -78,6 +78,7 @@ void gst_gl_effects_draw_texture (GstGLEffects * effects, GLuint tex);
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

17
gst/gl/effects/gstgleffectssources.c
View file

@ -59,3 +59,20 @@ const gchar *squeeze_fragment_source =
" 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;"
"}";

1
gst/gl/effects/gstgleffectssources.h
View file

@ -25,5 +25,6 @@
const gchar *mirror_fragment_source;
const gchar *squeeze_fragment_source;
const gchar *stretch_fragment_source;
#endif /* __GST_GL_EFFECTS_SOURCES_H__ */

68
gst/gl/effects/gstgleffectstretch.c Normal file
View file

@ -0,0 +1,68 @@
/*
* 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);
}

73
gst/gl/gstgleffects.c
View file

@ -53,11 +53,12 @@ static const GstElementDetails element_details = GST_ELEMENT_DETAILS (
"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;
@ -70,6 +71,7 @@ gst_gl_effects_effect_get_type (void)
{ 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 }
};
@ -80,6 +82,28 @@ gst_gl_effects_effect_get_type (void)
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)
@ -169,23 +193,21 @@ gst_gl_effects_draw_texture (GstGLEffects * effects, GLuint tex)
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)
@ -206,25 +228,6 @@ gst_gl_effects_reset_resources (GstGLFilter* filter)
effects->shaderstable = NULL;
}
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)