mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-20 11:00:16 +00:00
a9aa0ab2ee
Get rid of buggy and complicated hls conversion code for the sin effect. The only thing needed was hue anyway and it is easily calculated using Preucil formula for rgb to polar coordinates conversion. Now works on i915 (removed all the IF blocks). Still needs some tuning, I wonder if it will ever work properly.
527 lines
17 KiB
C
527 lines
17 KiB
C
/*
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* GStreamer
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* Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <gstgleffects.h>
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#include <gstgleffectssources.h>
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#include <math.h>
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/* A common file for sources is needed since shader sources can be
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* generic and reused by several effects */
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/* FIXME */
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/* Move sooner or later into single .frag .vert files and either bake
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* them into a c file at compile time or load them at run time */
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/* fill a normalized and zero centered gaussian vector for separable
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* gaussian convolution */
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void
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fill_gaussian_kernel (float *kernel, int size, float sigma)
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{
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int i;
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float sum;
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int l;
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/* need an odd sized vector to center it at zero */
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g_return_if_fail ((size % 2) != 0);
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sum = 0.0;
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l = (size - 1) / 2;
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for (i = 0; i < size; i++) {
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kernel[i] = expf (-pow ((i - l), 2.0) / (2 * sigma));
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sum += kernel[i];
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}
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for (i = 0; i < size; i++) {
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kernel[i] /= sum;
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}
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}
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/* *INDENT-OFF* */
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/* Vertex shader */
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const gchar *vertex_shader_source =
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"attribute vec4 a_position;"
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"attribute vec2 a_texCoord;"
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"varying vec2 v_texCoord;"
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"void main()"
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"{"
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" gl_Position = a_position;"
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" v_texCoord = a_texCoord;"
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"}";
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/* Identity effect */
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const gchar *identity_fragment_source =
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"precision mediump float;"
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"varying vec2 v_texCoord;"
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"uniform sampler2D tex;"
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"void main()"
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"{"
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" gl_FragColor = texture2D(tex, v_texCoord);"
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"}";
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/* Mirror effect */
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const gchar *mirror_fragment_source =
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#ifndef OPENGL_ES2
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect tex;"
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"uniform float width, height;"
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#else
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"precision mediump float;"
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"varying vec2 v_texCoord;"
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"uniform sampler2D tex;"
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#endif
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"void main () {"
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#ifndef OPENGL_ES2
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" vec2 tex_size = vec2 (width, height);"
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" vec2 texturecoord = gl_TexCoord[0].xy;"
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" vec2 normcoord;"
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" normcoord = texturecoord / tex_size - 1.0;"
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" normcoord.x *= sign (normcoord.x);"
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" texturecoord = (normcoord + 1.0) * tex_size;"
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" vec4 color = texture2DRect (tex, texturecoord);"
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" gl_FragColor = color * gl_Color;"
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#else
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" vec2 texturecoord = v_texCoord.xy;"
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" float normcoord = texturecoord.x - 0.5;"
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" normcoord *= sign (normcoord);"
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" texturecoord.x = (normcoord + 0.5);"
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" gl_FragColor = texture2D (tex, texturecoord);"
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#endif
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"}";
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/* Squeeze effect */
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const gchar *squeeze_fragment_source =
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#ifndef OPENGL_ES2
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect tex;"
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"uniform float width, height;"
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#else
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"precision mediump float;"
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"varying vec2 v_texCoord;"
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"uniform sampler2D tex;"
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#endif
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"void main () {"
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#ifndef OPENGL_ES2
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" vec2 tex_size = vec2 (width, height);"
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" vec2 texturecoord = gl_TexCoord[0].xy;"
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" vec2 normcoord;"
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" normcoord = texturecoord / tex_size - 1.0; "
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" float r = length (normcoord);"
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" r = pow(r, 0.40)*1.3;"
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" normcoord = normcoord / r;"
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" texturecoord = (normcoord + 1.0) * tex_size;"
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" vec4 color = texture2DRect (tex, texturecoord); "
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" gl_FragColor = color * gl_Color;"
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#else
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" vec2 texturecoord = v_texCoord.xy;"
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" vec2 normcoord = texturecoord - 0.5;"
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" float r = length (normcoord);"
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" r = pow(r, 0.40)*1.3;"
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" normcoord = normcoord / r;"
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" texturecoord = (normcoord + 0.5);"
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" gl_FragColor = texture2D (tex, texturecoord);"
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#endif
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"}";
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/* Stretch Effect */
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const gchar *stretch_fragment_source =
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect tex;"
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"uniform float width, height;"
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"void main () {"
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" vec2 tex_size = vec2 (width, height);"
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" vec2 texturecoord = gl_TexCoord[0].xy;"
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" vec2 normcoord;"
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" normcoord = texturecoord / tex_size - 1.0;"
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" float r = length (normcoord);"
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" normcoord *= 2.0 - smoothstep(0.0, 0.7, r);"
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" texturecoord = (normcoord + 1.0) * tex_size;"
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" vec4 color = texture2DRect (tex, texturecoord);"
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" gl_FragColor = color * gl_Color;"
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"}";
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/* Light Tunnel effect */
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const gchar *tunnel_fragment_source =
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect tex;"
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"uniform float width, height;"
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"void main () {"
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" vec2 tex_size = vec2 (width, height);"
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" vec2 texturecoord = gl_TexCoord[0].xy;"
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" vec2 normcoord;"
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/* little trick with normalized coords to obtain a circle with
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* rect textures */
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" normcoord = (texturecoord - tex_size) / tex_size.x;"
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" float r = length(normcoord);"
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" normcoord *= clamp (r, 0.0, 0.5) / r;"
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" texturecoord = (normcoord * tex_size.x) + tex_size;"
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" vec4 color = texture2DRect (tex, texturecoord); "
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" gl_FragColor = color;"
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"}";
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/* FishEye effect */
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const gchar *fisheye_fragment_source =
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect tex;"
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"uniform float width, height;"
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"void main () {"
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" vec2 tex_size = vec2 (width, height);"
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" vec2 texturecoord = gl_TexCoord[0].xy;"
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" vec2 normcoord;"
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" normcoord = texturecoord / tex_size - 1.0;"
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" float r = length (normcoord);"
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" normcoord *= r/sqrt(2.0);"
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" texturecoord = (normcoord + 1.0) * tex_size;"
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" vec4 color = texture2DRect (tex, texturecoord);"
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" gl_FragColor = color;"
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"}";
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/* Twirl effect */
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const gchar *twirl_fragment_source =
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect tex;"
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"uniform float width, height;"
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"void main () {"
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" vec2 tex_size = vec2 (width, height);"
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" vec2 texturecoord = gl_TexCoord[0].xy;"
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" vec2 normcoord;"
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" normcoord = texturecoord / tex_size - 1.0;"
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" float r = length (normcoord);"
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/* calculate rotation angle: maximum (about pi/2) at the origin and
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* gradually decrease it up to 0.6 of each quadrant */
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" float phi = (1.0 - smoothstep (0.0, 0.6, r)) * 1.6;"
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/* precalculate sin phi and cos phi, save some alu */
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" float s = sin(phi);"
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" float c = cos(phi);"
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/* rotate */
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" normcoord *= mat2(c, s, -s, c);"
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" texturecoord = (normcoord + 1.0) * tex_size;"
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" vec4 color = texture2DRect (tex, texturecoord); "
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" gl_FragColor = color;"
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"}";
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/* Bulge effect */
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const gchar *bulge_fragment_source =
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect tex;"
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"uniform float width, height;"
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"void main () {"
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" vec2 tex_size = vec2 (width, height);"
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" vec2 texturecoord = gl_TexCoord[0].xy;"
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" vec2 normcoord;"
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" normcoord = texturecoord / tex_size - 1.0;"
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" float r = length (normcoord);"
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" normcoord *= smoothstep (-0.1, 0.5, r);"
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" texturecoord = (normcoord + 1.0) * tex_size;"
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" vec4 color = texture2DRect (tex, texturecoord);"
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" gl_FragColor = color;"
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"}";
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/* Square Effect */
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const gchar *square_fragment_source =
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect tex;"
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"uniform float width;"
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"uniform float height;"
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"void main () {"
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" vec2 tex_size = vec2 (width, height);"
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" vec2 texturecoord = gl_TexCoord[0].xy;"
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" vec2 normcoord;"
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" normcoord = texturecoord / tex_size - 1.0;"
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" float r = length (normcoord);"
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" normcoord *= 1.0 + smoothstep(0.25, 0.5, abs(normcoord));"
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" normcoord /= 2.0; /* zoom amount */"
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" texturecoord = (normcoord + 1.0) * tex_size;"
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" vec4 color = texture2DRect (tex, texturecoord);"
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" gl_FragColor = color * gl_Color;"
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"}";
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const gchar *luma_threshold_fragment_source =
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect tex;"
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"void main () {"
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" vec2 texturecoord = gl_TexCoord[0].st;"
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" int i;"
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" vec4 color = texture2DRect(tex, texturecoord);"
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" float luma = dot(color.rgb, vec3(0.2125, 0.7154, 0.0721));" /* BT.709 (from orange book) */
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" gl_FragColor = vec4 (vec3 (smoothstep (0.30, 0.50, luma)), color.a);"
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"}";
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const gchar *sep_sobel_length_fragment_source =
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect tex;"
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"uniform bool invert;"
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"void main () {"
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" vec4 g = texture2DRect (tex, gl_TexCoord[0].st);"
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/* restore black background with grey edges */
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" g -= vec4(0.5, 0.5, 0.0, 0.0);"
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" float len = length (g);"
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/* little trick to avoid IF operator */
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/* TODO: test if a standalone inverting pass is worth */
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" gl_FragColor = abs(int(invert) - vec4(vec3(len), 1.0));"
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"}";
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const gchar *desaturate_fragment_source =
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect tex;"
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"void main () {"
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" vec4 color = texture2DRect (tex, gl_TexCoord[0].st);"
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" float luma = dot(color.rgb, vec3(0.2125, 0.7154, 0.0721));"
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" gl_FragColor = vec4(vec3(luma), color.a);"
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"}";
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const gchar *sep_sobel_hconv3_fragment_source =
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect tex;"
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"void main () {"
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" vec2 texturecoord[3];"
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" texturecoord[1] = gl_TexCoord[0].st;"
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" texturecoord[0] = texturecoord[1] - vec2(1.0, 0.0);"
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" texturecoord[2] = texturecoord[1] + vec2(1.0, 0.0);"
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" float grad_kern[3];"
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" grad_kern[0] = 1.0;"
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" grad_kern[1] = 0.0;"
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" grad_kern[2] = -1.0;"
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" float blur_kern[3];"
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" blur_kern[0] = 0.25;"
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" blur_kern[1] = 0.5;"
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" blur_kern[2] = 0.25;"
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" int i;"
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" vec4 sum = vec4 (0.0);"
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" for (i = 0; i < 3; i++) { "
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" vec4 neighbor = texture2DRect(tex, texturecoord[i]); "
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" sum.r = neighbor.r * blur_kern[i] + sum.r;"
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" sum.g = neighbor.g * grad_kern[i] + sum.g;"
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" }"
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" gl_FragColor = sum + vec4(0.0, 0.5, 0.0, 0.0);"
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"}";
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const gchar *sep_sobel_vconv3_fragment_source =
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect tex;"
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"void main () {"
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" vec2 texturecoord[3];"
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" texturecoord[1] = gl_TexCoord[0].st;"
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" texturecoord[0] = texturecoord[1] - vec2(0.0, 1.0);"
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" texturecoord[2] = texturecoord[1] + vec2(0.0, 1.0);"
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" float grad_kern[3];"
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" grad_kern[0] = 1.0;"
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" grad_kern[1] = 0.0;"
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" grad_kern[2] = -1.0;"
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" float blur_kern[3];"
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" blur_kern[0] = 0.25;"
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" blur_kern[1] = 0.5;"
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" blur_kern[2] = 0.25;"
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" int i;"
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" vec4 sum = vec4 (0.0);"
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" for (i = 0; i < 3; i++) { "
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" vec4 neighbor = texture2DRect(tex, texturecoord[i]); "
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" sum.r = neighbor.r * grad_kern[i] + sum.r;"
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" sum.g = neighbor.g * blur_kern[i] + sum.g;"
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" }"
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" gl_FragColor = sum + vec4(0.5, 0.0, 0.0, 0.0);"
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"}";
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/* horizontal convolution 9x9 */
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const gchar *hconv9_fragment_source =
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect tex;"
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"uniform float kernel[9];"
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"void main () {"
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" vec2 texturecoord[9];"
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" texturecoord[4] = gl_TexCoord[0].st;"
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" texturecoord[3] = texturecoord[4] - vec2(1.0, 0.0);"
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" texturecoord[2] = texturecoord[3] - vec2(1.0, 0.0);"
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" texturecoord[1] = texturecoord[2] - vec2(1.0, 0.0);"
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" texturecoord[0] = texturecoord[1] - vec2(1.0, 0.0);"
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" texturecoord[5] = texturecoord[4] + vec2(1.0, 0.0);"
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" texturecoord[6] = texturecoord[5] + vec2(1.0, 0.0);"
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" texturecoord[7] = texturecoord[6] + vec2(1.0, 0.0);"
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" texturecoord[8] = texturecoord[7] + vec2(1.0, 0.0);"
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" int i;"
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" vec4 sum = vec4 (0.0);"
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" for (i = 0; i < 9; i++) { "
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" vec4 neighbor = texture2DRect(tex, texturecoord[i]); "
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" sum += neighbor * kernel[i];"
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" }"
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" gl_FragColor = sum;"
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"}";
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/* vertical convolution 9x9 */
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const gchar *vconv9_fragment_source =
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect tex;"
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"uniform float kernel[9];"
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"void main () {"
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" vec2 texturecoord[9];"
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" texturecoord[4] = gl_TexCoord[0].st;"
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" texturecoord[3] = texturecoord[4] - vec2(0.0, 1.0);"
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" texturecoord[2] = texturecoord[3] - vec2(0.0, 1.0);"
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" texturecoord[1] = texturecoord[2] - vec2(0.0, 1.0);"
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" texturecoord[0] = texturecoord[1] - vec2(0.0, 1.0);"
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" texturecoord[5] = texturecoord[4] + vec2(0.0, 1.0);"
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" texturecoord[6] = texturecoord[5] + vec2(0.0, 1.0);"
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" texturecoord[7] = texturecoord[6] + vec2(0.0, 1.0);"
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" texturecoord[8] = texturecoord[7] + vec2(0.0, 1.0);"
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" int i;"
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" vec4 sum = vec4 (0.0);"
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" for (i = 0; i < 9; i++) { "
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" vec4 neighbor = texture2DRect(tex, texturecoord[i]);"
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" sum += neighbor * kernel[i];"
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" }"
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" gl_FragColor = sum;"
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"}";
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/* TODO: support several blend modes */
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const gchar *sum_fragment_source =
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect base;"
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"uniform sampler2DRect blend;"
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"uniform float alpha;"
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"uniform float beta;"
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"void main () {"
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" vec4 basecolor = texture2DRect (base, gl_TexCoord[0].st);"
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" vec4 blendcolor = texture2DRect (blend, gl_TexCoord[0].st);"
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" gl_FragColor = alpha * basecolor + beta * blendcolor;"
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"}";
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const gchar *multiply_fragment_source =
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect base;"
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"uniform sampler2DRect blend;"
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"uniform float alpha;"
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"void main () {"
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" vec4 basecolor = texture2DRect (base, gl_TexCoord[0].st);"
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" vec4 blendcolor = texture2DRect (blend, gl_TexCoord[0].st);"
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" gl_FragColor = (1.0 - alpha) * basecolor + alpha * basecolor * blendcolor;"
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"}";
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/* lut operations, map luma to tex1d, see orange book (chapter 19) */
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const gchar *luma_to_curve_fragment_source =
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect tex;"
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"uniform sampler1D curve;"
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"void main () {"
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" vec2 texturecoord = gl_TexCoord[0].st;"
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" vec4 color = texture2DRect (tex, texturecoord);"
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" float luma = dot(color.rgb, vec3(0.2125, 0.7154, 0.0721));"
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" color = texture1D(curve, luma);"
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" gl_FragColor = color;"
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"}";
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/* lut operations, map rgb to tex1d, see orange book (chapter 19) */
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const gchar *rgb_to_curve_fragment_source =
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect tex;"
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"uniform sampler1D curve;"
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"void main () {"
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" vec4 color = texture2DRect (tex, gl_TexCoord[0].st);"
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" vec4 outcolor;"
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" outcolor.r = texture1D(curve, color.r).r;"
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" outcolor.g = texture1D(curve, color.g).g;"
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" outcolor.b = texture1D(curve, color.b).b;"
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" outcolor.a = color.a;"
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" gl_FragColor = outcolor;"
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"}";
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const gchar *sin_fragment_source =
|
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect tex;"
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|
"void main () {"
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" vec4 color = texture2DRect (tex, vec2(gl_TexCoord[0].st));"
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" float luma = dot(color.rgb, vec3(0.2125, 0.7154, 0.0721));"
|
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/* calculate hue with the Preucil formula */
|
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" float cosh = 0.5*(2*color.r - color.g - color.b);"
|
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/* sqrt(3)/2 = 0.866 */
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" float sinh = 0.866*(color.g - color.b);"
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/* hue = atan2 h */
|
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" float tanh = sinh/cosh;"
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/* ok this is a little trick I came up because I didn't find any
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* detailed proof of the Preucil formula. The issue is that tan(h) is
|
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* pi-periodic so the smoothstep thing gives both reds (h = 0) and
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* cyans (h = 180). I don't want to use atan since it requires
|
|
* branching and doesn't work on i915. So take only the right half of
|
|
* the circle where cosine is positive */
|
|
/* take a slightly purple color trying to get rid of human skin reds */
|
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/* tanh = +-1.0 for h = +-45, where yellow=60, magenta=-60 */
|
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" float a = smoothstep (-1.0, -0.5, tanh);"
|
|
" float b = smoothstep (-0.1, 0.4, tanh);"
|
|
" float mix = (a - b) * step (0.0, cosh);"
|
|
" gl_FragColor = color * mix + luma * (1.0 - mix);"
|
|
"}";
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|
|
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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 + (1.0 - blendcolor.a) * basecolor;"
|
|
"}";
|
|
|
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const gchar *texture_interp_fragment_source =
|
|
"#extension GL_ARB_texture_rectangle : enable\n"
|
|
"uniform sampler2DRect base;"
|
|
"uniform sampler2DRect blend;"
|
|
"uniform sampler2DRect alpha;"
|
|
"uniform float final_width, final_height;"
|
|
"uniform float base_width, base_height;"
|
|
/*
|
|
"uniform float blend_width, blend_height;"
|
|
"uniform float alpha_width, alpha_height;"
|
|
*/
|
|
"void main () {"
|
|
"vec2 base_scale = vec2 (base_width, base_height) / vec2 (final_width, final_height);"
|
|
/*
|
|
"vec2 blend_scale = vec2 (blend_width, blend_height) / vec2 (final_width, final_height);"
|
|
"vec2 alpha_scale = vec2 (alpha_width, alpha_height) / vec2 (final_width, final_height);"
|
|
*/
|
|
|
|
"vec4 basecolor = texture2DRect (base, gl_TexCoord[0].st * base_scale);"
|
|
"vec4 blendcolor = texture2DRect (blend, gl_TexCoord[0].st);"
|
|
"vec4 alphacolor = texture2DRect (alpha, gl_TexCoord[0].st);"
|
|
// "gl_FragColor = alphacolor;"
|
|
"gl_FragColor = (alphacolor * blendcolor) + (1.0 - alphacolor) * basecolor;"
|
|
"}";
|
|
|
|
const gchar *difference_fragment_source =
|
|
"#extension GL_ARB_texture_rectangle : enable\n"
|
|
"uniform sampler2DRect saved;"
|
|
"uniform sampler2DRect current;"
|
|
"void main () {"
|
|
"vec4 savedcolor = texture2DRect (saved, gl_TexCoord[0].st);"
|
|
"vec4 currentcolor = texture2DRect (current, gl_TexCoord[0].st);"
|
|
"gl_FragColor = vec4 (step (0.12, length (savedcolor - currentcolor)));"
|
|
"}";
|
|
|
|
/* *INDENT-ON* */
|