roz/avidemux_shaders
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v2.0, better quality, less perspective deformation #1

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roz merged 27 commits from v2.0 into main 2025-10-09 04:46:20 +02:00
Conversation 0 Commits 27 Files Changed 11 +1016 -508
10 changed files with 1016 additions and 508 deletions
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gopro_8:7/unfish_gopro_8:7.glsl
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@ -20,7 +20,7 @@
#define color_conversion #define color_conversion
#define texture_filtering #define texture_filtering
//#define rotate_180 #define rotate_180
//#define debug_borders //#define debug_borders
#undef highp // defined by Qt-OpenGl #undef highp // defined by Qt-OpenGl
@ -67,7 +67,7 @@ vec2 equidistant_to_rectilinear(const in vec2 equidistant) {
float rectilinear_radius = length(equidistant); float rectilinear_radius = length(equidistant);
float rectilinear_angle = atan(rectilinear_radius / rectilinear_focal_length); float rectilinear_angle = atan(rectilinear_radius / rectilinear_focal_length);
float equidistant_radius = rectilinear_angle * equidistant_focal_length; float equidistant_radius = rectilinear_angle * equidistant_focal_length;
return equidistant * (equidistant_radius / rectilinear_radius); return equidistant * (equidistant_radius / (rectilinear_radius > 0.0 ? rectilinear_radius : 1.0));
} }
// color space (https://en.wikipedia.org/wiki/Rec._709) // color space (https://en.wikipedia.org/wiki/Rec._709)
@ -136,7 +136,6 @@ vec2 bilinear_params(const in vec2 coord, out vec2 a, out vec2 b, out vec2 c, ou
vec3 texture_filter(const in vec2 y_coord) { vec3 texture_filter(const in vec2 y_coord) {
vec2 a, b, c, d, f = bilinear_params(y_coord, a, b, c, d); vec2 a, b, c, d, f = bilinear_params(y_coord, a, b, c, d);
float luminance = mix( float luminance = mix(
mix( mix(
decode_luminance(texture2DRect(myTextureY, a).x), decode_luminance(texture2DRect(myTextureY, a).x),
@ -147,9 +146,7 @@ vec3 texture_filter(const in vec2 y_coord) {
decode_luminance(texture2DRect(myTextureY, d).x), decode_luminance(texture2DRect(myTextureY, d).x),
f.x), f.x),
f.y); f.y);
f = bilinear_params(y_coord * 0.5, a, b, c, d); f = bilinear_params(y_coord * 0.5, a, b, c, d);
vec2 chroma = mix( vec2 chroma = mix(
mix( mix(
decode_chroma(vec2(texture2DRect(myTextureU, a).x, texture2DRect(myTextureV, a).x)), decode_chroma(vec2(texture2DRect(myTextureU, a).x, texture2DRect(myTextureV, a).x)),
@ -160,7 +157,6 @@ vec3 texture_filter(const in vec2 y_coord) {
decode_chroma(vec2(texture2DRect(myTextureU, d).x, texture2DRect(myTextureV, d).x)), decode_chroma(vec2(texture2DRect(myTextureU, d).x, texture2DRect(myTextureV, d).x)),
f.x), f.x),
f.y); f.y);
return vec3(luminance, chroma); return vec3(luminance, chroma);
} }