UI: Fix scaling of HSV cursor when zooming

The small circle used to choose the hue/saturation and value in the
color widget was drawn with a fixed screen space size. Now scale the
circle used as cursor in the color widget based on the zoom. This
could have been part of a9642f8d6130 but the implementation is
different.

Based on a fix provided by Erik Abrahamsson

Differential Revision: https://developer.blender.org/D13444

1 files changed, 11 insertions, 6 deletions

diff --git a/source/blender/editors/interface/interface_widgets.c b/source/blender/editors/interface/interface_widgets.c
index bbd006d30c9..d2d71c920fe 100644
--- a/source/blender/editors/interface/interface_widgets.c
+++ b/source/blender/editors/interface/interface_widgets.c
@@ -2846,20 +2846,21 @@ static void widget_menu_back(
   GPU_blend(GPU_BLEND_NONE);
 }
 
-static void ui_hsv_cursor(float x, float y)
+static void ui_hsv_cursor(const float x, const float y, const float zoom)
 {
+  const float radius = zoom * 3.0f * U.pixelsize;
   const uint pos = GPU_vertformat_attr_add(
       immVertexFormat(), "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
 
   immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
 
   immUniformColor3f(1.0f, 1.0f, 1.0f);
-  imm_draw_circle_fill_2d(pos, x, y, 3.0f * U.pixelsize, 8);
+  imm_draw_circle_fill_2d(pos, x, y, radius, 8);
 
   GPU_blend(GPU_BLEND_ALPHA);
   GPU_line_smooth(true);
   immUniformColor3f(0.0f, 0.0f, 0.0f);
-  imm_draw_circle_wire_2d(pos, x, y, 3.0f * U.pixelsize, 12);
+  imm_draw_circle_wire_2d(pos, x, y, radius, 12);
   GPU_blend(GPU_BLEND_NONE);
   GPU_line_smooth(false);
 
@@ -3007,7 +3008,8 @@ static void ui_draw_but_HSVCIRCLE(uiBut *but, const uiWidgetColors *wcol, const
 
   float xpos, ypos;
   ui_hsvcircle_pos_from_vals(cpicker, rect, hsv, &xpos, &ypos);
-  ui_hsv_cursor(xpos, ypos);
+  const float zoom = 1.0f / but->block->aspect;
+  ui_hsv_cursor(xpos, ypos, zoom);
 }
 
 /** \} */
@@ -3241,7 +3243,9 @@ static void ui_draw_but_HSVCUBE(uiBut *but, const rcti *rect)
   CLAMP(x, rect->xmin + 3.0f, rect->xmax - 3.0f);
   CLAMP(y, rect->ymin + 3.0f, rect->ymax - 3.0f);
 
-  ui_hsv_cursor(x, y);
+  const float zoom = 1.0f / but->block->aspect;
+
+  ui_hsv_cursor(x, y, zoom);
 
   /* outline */
   const uint pos = GPU_vertformat_attr_add(
@@ -3304,8 +3308,9 @@ static void ui_draw_but_HSV_v(uiBut *but, const rcti *rect)
   x = rect->xmin + 0.5f * BLI_rcti_size_x(rect);
   y = rect->ymin + v * BLI_rcti_size_y(rect);
   CLAMP(y, rect->ymin + 3.0f, rect->ymax - 3.0f);
+  const float zoom = 1.0f / but->block->aspect;
 
-  ui_hsv_cursor(x, y);
+  ui_hsv_cursor(x, y, zoom);
 }
 
 /** Separator for menus. */