From ebde5b55013a11d889ee6cf7f278d8548e4f040c Mon Sep 17 00:00:00 2001 From: Filippo Argiolas Date: Thu, 14 Aug 2008 00:07:20 +0200 Subject: [PATCH] [161/906] import squeeze effect from cvs --- gst/gl/Makefile.am | 3 +- gst/gl/effects/gstgleffects.h | 1 + gst/gl/effects/gstgleffectsqueeze.c | 68 ++++++++++++++++++++++++++++++++++++ gst/gl/effects/gstgleffectssources.c | 23 +++++++++++- gst/gl/effects/gstgleffectssources.h | 1 + gst/gl/gstgleffects.c | 5 +++ 6 files changed, 99 insertions(+), 2 deletions(-) create mode 100644 gst/gl/effects/gstgleffectsqueeze.c diff --git a/gst/gl/Makefile.am b/gst/gl/Makefile.am index 0fe8339..55a83dc 100644 --- a/gst/gl/Makefile.am +++ b/gst/gl/Makefile.am @@ -30,7 +30,8 @@ libgstopengl_la_SOURCES = \ effects/gstgleffectssources.c \ effects/gstgleffectssources.h \ effects/gstgleffectidentity.c \ - effects/gstgleffectmirror.c + effects/gstgleffectmirror.c \ + effects/gstgleffectsqueeze.c # check order of CFLAGS and LIBS, shouldn't the order be the other way around diff --git a/gst/gl/effects/gstgleffects.h b/gst/gl/effects/gstgleffects.h index 174341b..1eb5df3 100644 --- a/gst/gl/effects/gstgleffects.h +++ b/gst/gl/effects/gstgleffects.h @@ -77,6 +77,7 @@ 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); G_END_DECLS diff --git a/gst/gl/effects/gstgleffectsqueeze.c b/gst/gl/effects/gstgleffectsqueeze.c new file mode 100644 index 0000000..b07a624 --- /dev/null +++ b/gst/gl/effects/gstgleffectsqueeze.c @@ -0,0 +1,68 @@ +/* + * GStreamer + * Copyright (C) 2008 Filippo Argiolas + * + * 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 + +static void +gst_gl_effects_squeeze_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, "squeeze0"); + + if (!shader) { + shader = gst_gl_shader_new (); + g_hash_table_insert (effects->shaderstable, "squeeze0", shader); + } + + g_return_if_fail ( + gst_gl_shader_compile_and_check (shader, squeeze_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_squeeze (GstGLEffects *effects) { + GstGLFilter *filter = GST_GL_FILTER (effects); + + gst_gl_filter_render_to_target (filter, effects->intexture, effects->outtexture, + gst_gl_effects_squeeze_callback, effects); +} diff --git a/gst/gl/effects/gstgleffectssources.c b/gst/gl/effects/gstgleffectssources.c index e976b3a..55acdd3 100644 --- a/gst/gl/effects/gstgleffectssources.c +++ b/gst/gl/effects/gstgleffectssources.c @@ -23,7 +23,8 @@ /* A common file for sources is needed since shader sources can be * generic and reused by several effects */ -/* Mirror */ + +/* Mirror effect */ const gchar *mirror_fragment_source = "#extension GL_ARB_texture_rectangle : enable\n" "uniform sampler2DRect tex;" @@ -38,3 +39,23 @@ const gchar *mirror_fragment_source = " vec4 color = texture2DRect (tex, texturecoord); " " gl_FragColor = color * gl_Color;" "}"; + + +/* Squeeze effect */ +const gchar *squeeze_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);" +" r = pow(r, 0.40)*1.3;" +" normcoord = normcoord / r;" +" texturecoord = (normcoord + 1.0) * tex_size;" +" vec4 color = texture2DRect (tex, texturecoord); " +" gl_FragColor = color * gl_Color;" +"}"; + diff --git a/gst/gl/effects/gstgleffectssources.h b/gst/gl/effects/gstgleffectssources.h index f58fe89..dee149f 100644 --- a/gst/gl/effects/gstgleffectssources.h +++ b/gst/gl/effects/gstgleffectssources.h @@ -24,5 +24,6 @@ #define __GST_GL_EFFECTS_SOURCES_H__ const gchar *mirror_fragment_source; +const gchar *squeeze_fragment_source; #endif /* __GST_GL_EFFECTS_SOURCES_H__ */ diff --git a/gst/gl/gstgleffects.c b/gst/gl/gstgleffects.c index 43b0178..942bea4 100644 --- a/gst/gl/gstgleffects.c +++ b/gst/gl/gstgleffects.c @@ -57,6 +57,7 @@ static const GstElementDetails element_details = GST_ELEMENT_DETAILS ( typedef enum { GST_GL_EFFECT_IDENTITY, GST_GL_EFFECT_MIRROR, + GST_GL_EFFECT_SQUEEZE, GST_GL_N_EFFECTS } GstGLEffectsEffect; @@ -68,6 +69,7 @@ gst_gl_effects_effect_get_type (void) static const GEnumValue effect_types [] = { { GST_GL_EFFECT_IDENTITY, "Do nothing Effect", "identity" }, { GST_GL_EFFECT_MIRROR, "Mirror Effect", "mirror" }, + { GST_GL_EFFECT_SQUEEZE, "Squeeze Effect", "squeeze" }, { 0, NULL, NULL } }; @@ -214,6 +216,9 @@ gst_gl_effects_set_effect (GstGLEffects *effects, gint effect_type) { 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 (); } -- 2.7.4