Add scaling for float images that are out of 0.0-1.0 range

shaders/image.frag

@@ -2,6 +2,7 @@
 
 uniform sampler2D qt_Texture0;
 uniform vec3 mtf_param[3];
+uniform vec2 unit_scale;
 uniform bool bw;
 uniform bool invert;
 uniform bool srgb;
@@ -46,6 +47,7 @@ vec3 checker()
 void main(void)
 {
     color = texture(qt_Texture0, qt_TexCoord0);
+    color.rgb = color.rgb * unit_scale.x + unit_scale.y;
     if(bw)color = color.rrra;
     color = MTF(color, vec4(mtf_param[0], 0.0), vec4(mtf_param[1], 0.5), vec4(mtf_param[2], 1.0));
     if(false_color)color.rgb = falsecolor(color.r);