Major MariFX update:

- Complete RetroFX filter (downscale+palette).
 - Additional palettes, extending to the full range of 64.
 - Localization support (just English for now).
 - Better slider input (shift for 10x increments, alt for 5x increments)
 - Use nosave cvars for performance and so they don't end up in savegames.
 - A lot of cleanup.

shaders/glsl/mfx_borderblur.fp

@@ -1,6 +1,6 @@
 /*
    Border blur from MariENB
-   (C)2012-2019 Marisa Kirisame
+   (C)2012-2021 Marisa Kirisame
 */
 void main()
 {

shaders/glsl/mfx_bss_blur.fp

@@ -1,6 +1,6 @@
 /*
    BlurSharpShift blur from MariENB
-   (C)2012-2019 Marisa Kirisame
+   (C)2012-2021 Marisa Kirisame
 */
 void main()
 {

shaders/glsl/mfx_bss_sharp.fp

@@ -1,6 +1,6 @@
 /*
    BlurSharpShift sharpen from MariENB
-   (C)2012-2019 Marisa Kirisame
+   (C)2012-2021 Marisa Kirisame
 */
 void main()
 {

shaders/glsl/mfx_bss_shift.fp

@@ -1,6 +1,6 @@
 /*
    BlurSharpShift shift from MariENB
-   (C)2012-2019 Marisa Kirisame
+   (C)2012-2021 Marisa Kirisame
 */
 void main()
 {

shaders/glsl/mfx_colormatrix.fp

@@ -1,6 +1,6 @@
 /*
    Simple color matrix from MariENB
-   (C)2012-2019 Marisa Kirisame
+   (C)2012-2021 Marisa Kirisame
 */
 void main()
 {

shaders/glsl/mfx_dirt.fp

@@ -1,6 +1,6 @@
 /*
    Dirty camera effect from MariENB
-   (C)2012-2019 Marisa Kirisame
+   (C)2012-2021 Marisa Kirisame
 */
 vec3 lensdirt( in vec3 res, in vec2 coord )
 {

shaders/glsl/mfx_grading.fp

@@ -1,6 +1,6 @@
 /*
    Math color grading from MariENB
-   (C)2012-2019 Marisa Kirisame
+   (C)2012-2021 Marisa Kirisame
 */
 #define luminance(x) dot(x,vec3(0.2126,0.7152,0.0722))
 

shaders/glsl/mfx_grain.fp

@@ -1,6 +1,6 @@
 /*
    Complex grain shader ported over from MariENB
-   (C)2012-2019 Marisa Kirisame
+   (C)2012-2021 Marisa Kirisame
 */
 const float nf = 0.0005;
 const vec3 nm1 = vec3(2.05,3.11,2.22);

shaders/glsl/mfx_huesaturation.fp

@@ -1,7 +1,7 @@
 /*
    Hue-Saturation filter from MariENB, ported over from GIMP
    (C)2007 Michael Natterer
-   (C)2012-2019 Marisa Kirisame
+   (C)2012-2021 Marisa Kirisame
 */
 vec3 rgb2hsv( vec3 c )
 {

shaders/glsl/mfx_lumasharp.fp

@@ -1,6 +1,6 @@
 /*
    LumaSharpen from MariENB
-   (C)2012-2019 Marisa Kirisame
+   (C)2012-2021 Marisa Kirisame
 */
 #define luminance(x) dot(x,vec3(0.2126,0.7152,0.0722))
 
@@ -19,4 +19,4 @@ void main()
 	thesewounds = clamp(thesewounds,-sharpclamp*0.01,sharpclamp*0.01);
 	vec4 theywillnotheal = res+thesewounds*sharpblend;
 	FragColor = theywillnotheal;
-}
+}

shaders/glsl/mfx_palette.fp

@@ -1,7 +1,23 @@
 /*
    RetroFX palette reduction from MariENB
-   (C)2012-2019 Marisa Kirisame
+   (C)2012-2021 Marisa Kirisame
 */
+vec3 rgb2hsv( vec3 c )
+{
+	vec4 K = vec4(0.0,-1.0/3.0,2.0/3.0,-1.0);
+	vec4 p = (c.g<c.b)?vec4(c.bg,K.wz):vec4(c.gb,K.xy);
+	vec4 q = (c.r<p.x)?vec4(p.xyw,c.r):vec4(c.r,p.yzx);
+	float d = q.x-min(q.w,q.y);
+	float e = 1.0e-10;
+	return vec3(abs(q.z+(q.w-q.y)/(6.0*d+e)),d/(q.x+e),q.x);
+}
+vec3 hsv2rgb( vec3 c )
+{
+	vec4 K = vec4(1.0,2.0/3.0,1.0/3.0,3.0);
+	vec3 p = abs(fract(c.xxx+K.xyz)*6.0-K.www);
+	return c.z*mix(K.xxx,clamp(p-K.xxx,0.0,1.0),c.y);
+}
+
 void main()
 {
 	#define d(x) x/64.0
@@ -18,8 +34,11 @@ void main()
 	);
 	#undef d
 	vec2 coord = TexCoord;
-	vec2 sfact = textureSize(InputTexture,0);
 	vec4 res = texture(InputTexture,coord);
+	vec3 hsv = rgb2hsv(res.rgb);
+	hsv.y = clamp(hsv.y*palsat,0.,1.);
+	hsv.z = pow(max(hsv.z,0.),palpow);
+	res.rgb = hsv2rgb(hsv);
 	if ( res.r <= 0.0 ) res.r -= paldither;
 	if ( res.g <= 0.0 ) res.g -= paldither;
 	if ( res.b <= 0.0 ) res.b -= paldither;

shaders/glsl/mfx_retrofx.fp

@@ -0,0 +1,10 @@
+/*
+   RetroFX downscaling from MariENB
+   (C)2012-2021 Marisa Kirisame
+*/
+void main()
+{
+	// far more simplified when the actual scale calculations are on the zscript side
+	ivec2 ncoord = ivec2((floor(TexCoord*bresl)/bresl)*textureSize(InputTexture,0));
+	FragColor = texelFetch(InputTexture,ncoord,0);
+}

shaders/glsl/mfx_vignette.fp

@@ -1,6 +1,6 @@
 /*
    Vignette filter from MariENB
-   (C)2012-2019 Marisa Kirisame
+   (C)2012-2021 Marisa Kirisame
 */
 void main()
 {