Commit: a74097dc19d1b1d43797fe7dfbc4a2137ad21c22
Author: Campbell Barton
Date:   Sat Apr 28 13:34:52 2018 +0200
Branches: blender2.8
https://developer.blender.org/rBa74097dc19d1b1d43797fe7dfbc4a2137ad21c22

UI: Add icon color saturation preference

Toolbar icon saturation can now be set from the preferences,
(use 0.4 by default).

===================================================================

M       release/scripts/startup/bl_ui/space_userpref.py
M       source/blender/editors/include/UI_interface_icons.h
M       source/blender/editors/interface/interface_icons.c
M       source/blender/editors/interface/interface_widgets.c
M       source/blender/editors/interface/resources.c
M       source/blender/gpu/shaders/gpu_shader_image_desaturate_frag.glsl
M       source/blender/makesdna/DNA_userdef_types.h
M       source/blender/makesrna/intern/rna_userdef.c

===================================================================

diff --git a/release/scripts/startup/bl_ui/space_userpref.py 
b/release/scripts/startup/bl_ui/space_userpref.py
index 5df49752634..454853545a6 100644
--- a/release/scripts/startup/bl_ui/space_userpref.py
+++ b/release/scripts/startup/bl_ui/space_userpref.py
@@ -898,6 +898,7 @@ class USERPREF_PT_theme(Panel):
             colsub = padding.column()
             colsub.row().prop(ui, "menu_shadow_fac")
             colsub.row().prop(ui, "icon_alpha")
+            colsub.row().prop(ui, "icon_saturation")
             colsub.row().prop(ui, "editor_outline")
 
             subsplit = row.split(percentage=0.85)
diff --git a/source/blender/editors/include/UI_interface_icons.h 
b/source/blender/editors/include/UI_interface_icons.h
index a17eb6be618..a3be887bf5b 100644
--- a/source/blender/editors/include/UI_interface_icons.h
+++ b/source/blender/editors/include/UI_interface_icons.h
@@ -76,7 +76,7 @@ void UI_icon_draw_preview_aspect_size(float x, float y, int 
icon_id, float aspec
 void UI_icon_draw_aspect(float x, float y, int icon_id, float aspect, float 
alpha);
 void UI_icon_draw_aspect_color(float x, float y, int icon_id, float aspect, 
const float rgb[3]);
 void UI_icon_draw_size(float x, float y, int size, int icon_id, float alpha);
-void UI_icon_draw_desaturate(float x, float y, int icon_id, float aspect, 
float alpha);
+void UI_icon_draw_desaturate(float x, float y, int icon_id, float aspect, 
float alpha, float desaturate);
 void UI_icons_free(void);
 void UI_icons_free_drawinfo(void *drawinfo);
 
diff --git a/source/blender/editors/interface/interface_icons.c 
b/source/blender/editors/interface/interface_icons.c
index c78e49517c3..2fca0bbbf79 100644
--- a/source/blender/editors/interface/interface_icons.c
+++ b/source/blender/editors/interface/interface_icons.c
@@ -977,7 +977,7 @@ PreviewImage *UI_icon_to_preview(int icon_id)
 }
 
 static void icon_draw_rect(float x, float y, int w, int h, float 
UNUSED(aspect), int rw, int rh,
-                           unsigned int *rect, float alpha, const float 
rgb[3], const bool desaturate)
+                           unsigned int *rect, float alpha, const float 
rgb[3], const float desaturate)
 {
        ImBuf *ima = NULL;
        int draw_w = w;
@@ -1026,8 +1026,19 @@ static void icon_draw_rect(float x, float y, int w, int 
h, float UNUSED(aspect),
        UI_widgetbase_draw_cache_flush();
 
        /* draw */
-       GPUBuiltinShader shader = (desaturate) ? 
GPU_SHADER_2D_IMAGE_DESATURATE_COLOR : GPU_SHADER_2D_IMAGE_COLOR;
+       GPUBuiltinShader shader;
+       if (desaturate != 0.0f) {
+               shader = GPU_SHADER_2D_IMAGE_DESATURATE_COLOR;
+       }
+       else {
+               shader = GPU_SHADER_2D_IMAGE_COLOR;
+       }
        IMMDrawPixelsTexState state = immDrawPixelsTexSetup(shader);
+
+       if (shader == GPU_SHADER_2D_IMAGE_DESATURATE_COLOR) {
+               immUniform1f("factor", desaturate);
+       }
+
        immDrawPixelsTex(&state, draw_x, draw_y, draw_w, draw_h, GL_RGBA, 
GL_UNSIGNED_BYTE, GL_NEAREST, rect,
                         1.0f, 1.0f, col);
 
@@ -1193,7 +1204,7 @@ static int get_draw_size(enum eIconSizes size)
 
 static void icon_draw_size(
         float x, float y, int icon_id, float aspect, float alpha, const float 
rgb[3],
-        enum eIconSizes size, int draw_size, const bool desaturate)
+        enum eIconSizes size, int draw_size, const float desaturate)
 {
        bTheme *btheme = UI_GetTheme();
        Icon *icon = NULL;
@@ -1529,7 +1540,7 @@ int UI_idcode_icon_get(const int idcode)
 
 static void icon_draw_at_size(
         float x, float y, int icon_id, float aspect, float alpha,
-        enum eIconSizes size, const bool desaturate)
+        enum eIconSizes size, const float desaturate)
 {
        int draw_size = get_draw_size(size);
        icon_draw_size(x, y, icon_id, aspect, alpha, NULL, size, draw_size, 
desaturate);
@@ -1537,7 +1548,7 @@ static void icon_draw_at_size(
 
 void UI_icon_draw_aspect(float x, float y, int icon_id, float aspect, float 
alpha)
 {
-       icon_draw_at_size(x, y, icon_id, aspect, alpha, ICON_SIZE_ICON, false);
+       icon_draw_at_size(x, y, icon_id, aspect, alpha, ICON_SIZE_ICON, 0.0f);
 }
 
 void UI_icon_draw_aspect_color(float x, float y, int icon_id, float aspect, 
const float rgb[3])
@@ -1546,9 +1557,9 @@ void UI_icon_draw_aspect_color(float x, float y, int 
icon_id, float aspect, cons
        icon_draw_size(x, y, icon_id, aspect, 1.0f, rgb, ICON_SIZE_ICON, 
draw_size, false);
 }
 
-void UI_icon_draw_desaturate(float x, float y, int icon_id, float aspect, 
float alpha)
+void UI_icon_draw_desaturate(float x, float y, int icon_id, float aspect, 
float alpha, float desaturate)
 {
-       icon_draw_at_size(x, y, icon_id, aspect, alpha, ICON_SIZE_ICON, true);
+       icon_draw_at_size(x, y, icon_id, aspect, alpha, ICON_SIZE_ICON, 
desaturate);
 }
 
 /* draws icon with dpi scale factor */
diff --git a/source/blender/editors/interface/interface_widgets.c 
b/source/blender/editors/interface/interface_widgets.c
index 339bedc1c06..bd9b22c9a2f 100644
--- a/source/blender/editors/interface/interface_widgets.c
+++ b/source/blender/editors/interface/interface_widgets.c
@@ -1327,7 +1327,8 @@ static void widget_draw_icon_ex(
                        UI_icon_draw_aspect(xs, ys, icon, aspect, alpha);
                }
                else {
-                       UI_icon_draw_desaturate(xs, ys, icon, aspect, alpha);
+                       const bTheme *btheme = UI_GetTheme();
+                       UI_icon_draw_desaturate(xs, ys, icon, aspect, alpha, 
1.0 - btheme->tui.icon_saturation);
                }
        }
 
diff --git a/source/blender/editors/interface/resources.c 
b/source/blender/editors/interface/resources.c
index d284bde6ce6..96ba722289d 100644
--- a/source/blender/editors/interface/resources.c
+++ b/source/blender/editors/interface/resources.c
@@ -2999,6 +2999,7 @@ void init_userdef_do_versions(void)
                };
                for (bTheme *btheme = U.themes.first; btheme; btheme = 
btheme->next) {
                        btheme->tui.wcol_toolbar_item = wcol_toolbar_item;
+                       btheme->tui.icon_saturation = 0.4f;
                }
        }
 
diff --git a/source/blender/gpu/shaders/gpu_shader_image_desaturate_frag.glsl 
b/source/blender/gpu/shaders/gpu_shader_image_desaturate_frag.glsl
index 5b2ccb8ff3a..1ac0d68b35f 100644
--- a/source/blender/gpu/shaders/gpu_shader_image_desaturate_frag.glsl
+++ b/source/blender/gpu/shaders/gpu_shader_image_desaturate_frag.glsl
@@ -1,4 +1,5 @@
 
+uniform float factor;
 in vec2 texCoord_interp;
 out vec4 fragColor;
 
@@ -8,6 +9,6 @@ uniform sampler2D image;
 void main()
 {
        vec4 tex = texture(image, texCoord_interp);
-       tex.rgb = 0.3333333 * vec3(tex.r + tex.g + tex.b);
+       tex.rgb = ((0.3333333 * factor) * vec3(tex.r + tex.g + tex.b)) + 
(tex.rgb * (1.0 - factor));
        fragColor = tex * color;
 }
diff --git a/source/blender/makesdna/DNA_userdef_types.h 
b/source/blender/makesdna/DNA_userdef_types.h
index 3973006283d..7b2ad060e61 100644
--- a/source/blender/makesdna/DNA_userdef_types.h
+++ b/source/blender/makesdna/DNA_userdef_types.h
@@ -185,6 +185,8 @@ typedef struct ThemeUI {
        
        char iconfile[256];     // FILE_MAXFILE length
        float icon_alpha;
+       float icon_saturation;
+       char _pad[4];
 
        /* Axis Colors */
        char xaxis[4], yaxis[4], zaxis[4];
diff --git a/source/blender/makesrna/intern/rna_userdef.c 
b/source/blender/makesrna/intern/rna_userdef.c
index f99b4b59f1a..03034522d30 100644
--- a/source/blender/makesrna/intern/rna_userdef.c
+++ b/source/blender/makesrna/intern/rna_userdef.c
@@ -1076,6 +1076,10 @@ static void rna_def_userdef_theme_ui(BlenderRNA *brna)
        prop = RNA_def_property(srna, "icon_alpha", PROP_FLOAT, PROP_FACTOR);
        RNA_def_property_ui_text(prop, "Icon Alpha", "Transparency of icons in 
the interface, to reduce contrast");
        RNA_def_property_update(prop, 0, "rna_userdef_update");
+
+       prop = RNA_def_property(srna, "icon_saturation", PROP_FLOAT, 
PROP_FACTOR);
+       RNA_def_property_ui_text(prop, "Icon Saturation", "Saturation of icons 
in the interface");
+       RNA_def_property_update(prop, 0, "rna_userdef_update");
        
        prop = RNA_def_property(srna, "widget_emboss", PROP_FLOAT, 
PROP_COLOR_GAMMA);
        RNA_def_property_float_sdna(prop, NULL, "widget_emboss");

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