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d02a585e7b
The background image needs to be scaled to fit current texture size. Previously this was done by gdk_pixbuf_scale_simple but that's been removed. Create a texture from the background pixbuf with correct dimensions and use interpolation shader to scale it to the right size. Interpolation fragment shader doesn't have too much sense if all the textures don't have the same size so this seemed the most natural place to do the scaling. It could probably be done with some custom texture mapping outside the shader but it involved more code. Fixes bug #599883.
388 lines
15 KiB
C
388 lines
15 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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/* 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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/* Mirror effect */
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const gchar *mirror_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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" 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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/* Squeeze effect */
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const gchar *squeeze_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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" 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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/* 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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/* 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;" " vec2 normcoord;"
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/* little trick with normalized coords to obtain a circle */
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" normcoord = texturecoord / tex_size.x - tex_size / tex_size.x;" " float r = length(normcoord);" " float phi = atan(normcoord.y, normcoord.x);" " r = clamp (r, 0.0, 0.5);" /* is there a way to do this without polars? */
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" normcoord.x = r * cos(phi);"
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" normcoord.y = r * sin(phi); "
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" texturecoord = (normcoord + tex_size/tex_size.x) * tex_size.x;"
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" vec4 color = texture2DRect (tex, texturecoord); "
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" gl_FragColor = color;" "}";
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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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/* 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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" float phi = atan (normcoord.y, normcoord.x);"
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" phi += (1.0 - smoothstep (-0.6, 0.6, r)) * 4.8;"
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" normcoord.x = r * cos(phi);"
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" normcoord.y = r * sin(phi);"
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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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/* 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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/* 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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const gchar *luma_threshold_fragment_source = "#extension GL_ARB_texture_rectangle : enable\n" "uniform sampler2DRect tex;" "void main () {" " vec2 texturecoord = gl_TexCoord[0].st;" " int i;" " vec4 color = texture2DRect(tex, texturecoord);" " 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 *sobel_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 hkern[9];"
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"uniform float vkern[9];"
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"uniform bool invert;"
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"void main () {"
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" vec2 offset[9] = vec2[9] ( vec2(-1.0,-1.0), vec2( 0.0,-1.0), vec2( 1.0,-1.0),"
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" vec2(-1.0, 0.0), vec2( 0.0, 0.0), vec2( 1.0, 0.0),"
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" vec2(-1.0, 1.0), vec2( 0.0, 1.0), vec2( 1.0, 1.0) );"
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" vec2 texturecoord = gl_TexCoord[0].st;"
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" int i;"
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" float luma;"
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" float gx = 0.0;"
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" float gy = 0.0 ;"
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" for (i = 0; i < 9; i++) { "
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" if(hkern[i] != 0.0 || vkern[i] != 0.0) {"
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" vec4 neighbor = texture2DRect(tex, texturecoord + vec2(offset[i])); "
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" luma = dot(neighbor, vec4(0.2125, 0.7154, 0.0721, neighbor.a));"
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" gx += luma * hkern[i]; "
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" gy += luma * vkern[i]; "
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" }"
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" }"
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" float g = sqrt(gx*gx + gy*gy);"
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" if (invert) g = 1.0 - g;" " gl_FragColor = vec4(vec3(g), 1.0);" "}";
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/* horizontal convolution */
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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 norm_const;"
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"uniform float norm_offset;" "uniform float kernel[9];" "void main () {"
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/* "float offset[9] = float[9] (-4.0, -3.0, -2.0, -1.0, 0.0, 1.0, 2.0, 3.0, 4.0);" */
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/* don't use array constructor so we don't have to depend on #version 120 */
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" float offset[9];"
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" offset[0] = -4.0;"
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" offset[1] = -3.0;"
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" offset[2] = -2.0;"
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" offset[3] = -1.0;"
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" offset[4] = 0.0;"
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" offset[5] = 1.0;"
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" offset[6] = 2.0;"
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" offset[7] = 3.0;"
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" offset[8] = 4.0;"
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" vec2 texturecoord = gl_TexCoord[0].st;"
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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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" if (kernel[i] != 0.0) {"
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" vec4 neighbor = texture2DRect(tex, vec2(texturecoord.s+offset[i], texturecoord.t)); "
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" sum += neighbor * kernel[i]/norm_const; "
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" }" " }" " gl_FragColor = sum + norm_offset;" "}";
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/* vertical convolution */
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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 norm_const;"
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"uniform float norm_offset;" "uniform float kernel[9];" "void main () {"
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/* "float offset[9] = float[9] (-4.0, -3.0, -2.0, -1.0, 0.0, 1.0, 2.0, 3.0, 4.0);" */
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/* don't use array constructor so we don't have to depend on #version 120 */
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" float offset[9];"
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" offset[0] = -4.0;"
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" offset[1] = -3.0;"
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" offset[2] = -2.0;"
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" offset[3] = -1.0;"
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" offset[4] = 0.0;"
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" offset[5] = 1.0;"
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" offset[6] = 2.0;"
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" offset[7] = 3.0;"
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" offset[8] = 4.0;"
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" vec2 texturecoord = gl_TexCoord[0].st;"
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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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" if (kernel[i] != 0.0) {"
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" vec4 neighbor = texture2DRect(tex, vec2(texturecoord.s, texturecoord.t+offset[i])); "
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" sum += neighbor * kernel[i]/norm_const; "
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" }" " }" " gl_FragColor = sum + norm_offset;" "}";
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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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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 - 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);" " gl_FragColor = color;" "}";
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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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" vec2 texturecoord = gl_TexCoord[0].st;"
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" vec4 color = texture2DRect (tex, texturecoord);"
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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;" " gl_FragColor = outcolor;" "}";
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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;" "vec3 rgb2hsl (vec3 v) " "{"
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/* TODO: check this algorythm */
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" float MIN, MAX;"
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" float r, g, b;"
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" float h, l, s;"
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" float delta;"
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" h = 0.0; l = 0.0; s = 0.0;"
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" r = v.r; g = v.g; b = v.b;"
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" MIN = min (r, min (g, b));"
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" MAX = max (r, max (g, b));"
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" delta = MAX - MIN;"
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" l = (MAX + MIN) / 2.0;"
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" if ((MAX - MIN) < 0.0001) { h = 0.0; s = 0.0; }"
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" else {"
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" if (l <= 0.5) s = (MAX - MIN) / (MAX + MIN);"
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" else s = (MAX - MIN) / (2.0 - MAX - MIN);"
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" if (r == MAX) h = (g - b) / delta;"
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" else if (g == MAX) h = 2.0 + (b - r) / delta;"
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" else h = 4.0 + (r - g) / delta;"
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" h *= 60.0;"
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" if (h < 0.0) h += 360.0;"
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" }"
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" return vec3 (h, l, s);"
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"}"
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"void main () {"
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" vec3 HSL, RGB;"
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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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" HSL = rgb2hsl (color.rgb);"
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/* move hls discontinuity away from the desired red zone so we can use
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* smoothstep.. to try: convert degrees in radiants, divide by 2 and
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* smoothstep cosine */
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" HSL.x += 180.0;" " if ((HSL.x) > 360.0) HSL.x -= 360.0;"
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/* damn, it is extremely hard to get rid of human face reds! */
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/* picked hue is slightly shifted towards violet to prevent this but
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* still fails.. maybe hsl is not well suited for this */
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" float a = smoothstep (110.0, 150.0, HSL.x);"
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" float b = smoothstep (170.0, 210.0, HSL.x);"
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" float alpha = a - b;"
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" gl_FragColor = color * alpha + luma * (1.0 - alpha);" "}";
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const gchar *interpolate_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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"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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"vec4 white = vec4(1.0);"
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"gl_FragColor = blendcolor + (1.0 - blendcolor.a) * basecolor;" "}";
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const gchar *texture_interp_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 sampler2DRect alpha;"
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"uniform float final_width, final_height;"
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"uniform float base_width, base_height;"
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/*
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"uniform float blend_width, blend_height;"
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"uniform float alpha_width, alpha_height;"
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*/
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"void main () {"
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"vec2 base_scale = vec2 (base_width, base_height) / vec2 (final_width, final_height);"
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/*
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"vec2 blend_scale = vec2 (blend_width, blend_height) / vec2 (final_width, final_height);"
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"vec2 alpha_scale = vec2 (alpha_width, alpha_height) / vec2 (final_width, final_height);"
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*/
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"vec4 basecolor = texture2DRect (base, gl_TexCoord[0].st * base_scale);"
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"vec4 blendcolor = texture2DRect (blend, gl_TexCoord[0].st);"
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"vec4 alphacolor = texture2DRect (alpha, gl_TexCoord[0].st);"
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// "gl_FragColor = alphacolor;"
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"gl_FragColor = (alphacolor * blendcolor) + (1.0 - alphacolor) * basecolor;"
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"}";
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const gchar *difference_fragment_source =
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"#extension GL_ARB_texture_rectangle : enable\n"
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"uniform sampler2DRect saved;"
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"uniform sampler2DRect current;"
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"void main () {"
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"vec4 savedcolor = texture2DRect (saved, gl_TexCoord[0].st);"
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"vec4 currentcolor = texture2DRect (current, gl_TexCoord[0].st);"
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"gl_FragColor = vec4 (step (0.12, length (savedcolor - currentcolor)));"
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"}";
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