[client] egl: added colorblind support (egl:cbMode=0/1/2/3)

Based on http://www.daltonize.org/search/label/Daltonize

0 = Off
1 = Protanope
2 = Deuteranope
3 = Tritanope

client/renderers/EGL/cursor.c

@@ -20,6 +20,7 @@ Place, Suite 330, Boston, MA 02111-1307 USA
 #include "cursor.h"
 #include "common/debug.h"
 #include "common/locking.h"
+#include "common/option.h"
 
 #include "texture.h"
 #include "shader.h"
@@ -47,6 +48,7 @@ struct EGL_Cursor
   // cursor state
   bool              visible;
   float             x, y, w, h;
+  int               cbMode;
 
   // textures
   struct EGL_Texture * texture;
@@ -59,6 +61,7 @@ struct EGL_Cursor
   // uniforms
   GLuint uMousePos;
   GLuint uMousePosMono;
+  GLuint uCBMode;
 
   // model
   struct EGL_Model   * model;
@@ -118,8 +121,10 @@ bool egl_cursor_init(EGL_Cursor ** cursor)
     return false;
   }
 
-  (*cursor)->uMousePos     = egl_shader_get_uniform_location((*cursor)->shader    , "mouse");
+  (*cursor)->uMousePos     = egl_shader_get_uniform_location((*cursor)->shader    , "mouse" );
-  (*cursor)->uMousePosMono = egl_shader_get_uniform_location((*cursor)->shaderMono, "mouse");
+  (*cursor)->uCBMode       = egl_shader_get_uniform_location((*cursor)->shader    , "cbMode");
+
+  (*cursor)->uMousePosMono = egl_shader_get_uniform_location((*cursor)->shaderMono, "mouse" );
 
   if (!egl_model_init(&(*cursor)->model))
   {
@@ -128,6 +133,9 @@ bool egl_cursor_init(EGL_Cursor ** cursor)
   }
 
   egl_model_set_default((*cursor)->model);
+
+  (*cursor)->cbMode = option_get_int("egl", "cbMode");
+
   return true;
 }
 
@@ -255,6 +263,7 @@ void egl_cursor_render(EGL_Cursor * cursor)
     {
       egl_shader_use(cursor->shader);
       glUniform4f(cursor->uMousePos, cursor->x, cursor->y, cursor->w, cursor->h / 2);
+      glUniform1i(cursor->uCBMode  , cursor->cbMode);
       glBlendFunc(GL_ZERO, GL_SRC_COLOR);
       egl_model_set_texture(cursor->model, cursor->texture);
       egl_model_render(cursor->model);
@@ -271,6 +280,7 @@ void egl_cursor_render(EGL_Cursor * cursor)
     {
       egl_shader_use(cursor->shader);
       glUniform4f(cursor->uMousePos, cursor->x, cursor->y, cursor->w, cursor->h);
+      glUniform1i(cursor->uCBMode  , cursor->cbMode);
       glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
       egl_model_render(cursor->model);
       break;

client/renderers/EGL/desktop.c

@@ -43,6 +43,7 @@ struct DesktopShader
   GLint uDesktopSize;
   GLint uNearest;
   GLint uNV, uNVGain;
+  GLint uCBMode;
 };
 
 struct EGL_Desktop
@@ -64,6 +65,9 @@ struct EGL_Desktop
   KeybindHandle kbNV;
   int   nvMax;
   int   nvGain;
+
+  // colorblind mode
+  int   cbMode;
 };
 
 // forwards
@@ -90,6 +94,7 @@ static bool egl_init_desktop_shader(
   shader->uNearest     = egl_shader_get_uniform_location(shader->shader, "nearest" );
   shader->uNV          = egl_shader_get_uniform_location(shader->shader, "nv"      );
   shader->uNVGain      = egl_shader_get_uniform_location(shader->shader, "nvGain"  );
+  shader->uCBMode      = egl_shader_get_uniform_location(shader->shader, "cbMode"  );
 
   return true;
 }
@@ -143,6 +148,7 @@ bool egl_desktop_init(EGL_Desktop ** desktop, EGLDisplay * display)
 
   (*desktop)->nvMax  = option_get_int("egl", "nvGainMax");
   (*desktop)->nvGain = option_get_int("egl", "nvGain"   );
+  (*desktop)->cbMode = option_get_int("egl", "cbMode"   );
 
   return true;
 }
@@ -272,6 +278,7 @@ bool egl_desktop_render(EGL_Desktop * desktop, const float x, const float y, con
   else
     glUniform1i(shader->uNV, 0);
 
+  glUniform1i(shader->uCBMode, desktop->cbMode);
   egl_model_render(desktop->model);
   return true;
 }

client/renderers/EGL/egl.c

@@ -134,6 +134,13 @@ static struct Option egl_options[] =
     .type         = OPTION_TYPE_INT,
     .value.x_int  = 0
   },
+  {
+    .module       = "egl",
+    .name         = "cbMode",
+    .description  = "Colorblind Mode (0 = Off, 1 = Protanope, 2 = Deuteranope, 3 = Tritanope)",
+    .type         = OPTION_TYPE_INT,
+    .value.x_int  = 0
+  },
   {0}
 };
 

client/renderers/EGL/shader/cursor_rgb.frag

@@ -5,7 +5,46 @@ out highp vec4 color;
 
 uniform sampler2D sampler1;
 
+uniform int cbMode;
+
 void main()
 {
   color = texture(sampler1, uv);
+
+  if (cbMode > 0)
+  {
+    highp float L = (17.8824000 * color.r) + (43.516100 * color.g) + (4.11935 * color.b);
+    highp float M = (03.4556500 * color.r) + (27.155400 * color.g) + (3.86714 * color.b);
+    highp float S = (00.0299566 * color.r) + (00.184309 * color.g) + (1.46709 * color.b);
+    highp float l, m, s;
+
+    if (cbMode == 1) // Protanope
+    {
+      l = 0.0f * L + 2.02344f * M + -2.52581f * S;
+      m = 0.0f * L + 1.0f * M + 0.0f * S;
+      s = 0.0f * L + 0.0f * M + 1.0f * S;
+    }
+    else if (cbMode == 2) // Deuteranope
+    {
+      l = 1.000000 * L + 0.0f * M + 0.00000 * S;
+      m = 0.494207 * L + 0.0f * M + 1.24827 * S;
+      s = 0.000000 * L + 0.0f * M + 1.00000 * S;
+    }
+    else if (cbMode == 3) // Tritanope
+    {
+      l =  1.000000 * L + 0.000000 * M + 0.0 * S;
+      m =  0.000000 * L + 1.000000 * M + 0.0 * S;
+      s = -0.395913 * L + 0.801109 * M + 0.0 * S;
+    }
+
+    highp vec4 error;
+    error.r = ( 0.080944447900 * l) + (-0.13050440900 * m) + ( 0.116721066 * s);
+    error.g = (-0.010248533500 * l) + ( 0.05401932660 * m) + (-0.113614708 * s);
+    error.b = (-0.000365296938 * l) + (-0.00412161469 * m) + ( 0.693511405 * s);
+    error.a = 0.0;
+
+    error = color - error;
+    color.g += (error.r * 0.7) + (error.g * 1.0);
+    color.b += (error.r * 0.7) + (error.b * 1.0);
+  }
 }

client/renderers/EGL/shader/desktop_rgb.frag

@@ -10,6 +10,7 @@ uniform highp vec2  size;
 
 uniform       int   nv;
 uniform highp float nvGain;
+uniform       int   cbMode;
 
 void main()
 {
@@ -18,6 +19,43 @@ void main()
   else
     color = texelFetch(sampler1, ivec2(uv * size), 0);
 
+  if (cbMode > 0)
+  {
+    highp float L = (17.8824000 * color.r) + (43.516100 * color.g) + (4.11935 * color.b);
+    highp float M = (03.4556500 * color.r) + (27.155400 * color.g) + (3.86714 * color.b);
+    highp float S = (00.0299566 * color.r) + (00.184309 * color.g) + (1.46709 * color.b);
+    highp float l, m, s;
+
+    if (cbMode == 1) // Protanope
+    {
+      l = 0.0f * L + 2.02344f * M + -2.52581f * S;
+      m = 0.0f * L + 1.0f * M + 0.0f * S;
+      s = 0.0f * L + 0.0f * M + 1.0f * S;
+    }
+    else if (cbMode == 2) // Deuteranope
+    {
+      l = 1.000000 * L + 0.0f * M + 0.00000 * S;
+      m = 0.494207 * L + 0.0f * M + 1.24827 * S;
+      s = 0.000000 * L + 0.0f * M + 1.00000 * S;
+    }
+    else if (cbMode == 3) // Tritanope
+    {
+      l =  1.000000 * L + 0.000000 * M + 0.0 * S;
+      m =  0.000000 * L + 1.000000 * M + 0.0 * S;
+      s = -0.395913 * L + 0.801109 * M + 0.0 * S;
+    }
+
+    highp vec4 error;
+    error.r = ( 0.080944447900 * l) + (-0.13050440900 * m) + ( 0.116721066 * s);
+    error.g = (-0.010248533500 * l) + ( 0.05401932660 * m) + (-0.113614708 * s);
+    error.b = (-0.000365296938 * l) + (-0.00412161469 * m) + ( 0.693511405 * s);
+    error.a = 0.0;
+
+    error = color - error;
+    color.g += (error.r * 0.7) + (error.g * 1.0);
+    color.b += (error.r * 0.7) + (error.b * 1.0);
+  }
+
   if (nv == 1)
   {
     highp float lumi = 1.0 - (0.2126 * color.r + 0.7152 * color.g + 0.0722 * color.b);