1 files changed, 23 insertions, 2 deletions
diff --git a/source/blender/draw/engines/gpencil/shaders/gpencil_stroke_frag.glsl b/source/blender/draw/engines/gpencil/shaders/gpencil_stroke_frag.glsl
index 6b7cee888ea..6b3fcad1240 100644
--- a/source/blender/draw/engines/gpencil/shaders/gpencil_stroke_frag.glsl
+++ b/source/blender/draw/engines/gpencil/shaders/gpencil_stroke_frag.glsl
@@ -27,6 +27,27 @@ out vec4 fragColor;
 
 bool no_texture = (shading_type[0] == OB_SOLID) && (shading_type[1] != V3D_SHADING_TEXTURE_COLOR);
 
+float linearrgb_to_srgb(float c)
+{
+  if (c < 0.0031308) {
+    return (c < 0.0) ? 0.0 : c * 12.92;
+  }
+  else {
+    return 1.055 * pow(c, 1.0 / 2.4) - 0.055;
+  }
+}
+
+vec4 texture_read_as_srgb(sampler2D tex, vec2 co)
+{
+  /* By convention image textures return scene linear colors, but
+   * grease pencil still works in srgb. */
+  vec4 color = texture2D(tex, co);
+  color.r = linearrgb_to_srgb(color.r);
+  color.g = linearrgb_to_srgb(color.g);
+  color.b = linearrgb_to_srgb(color.b);
+  return color;
+}
+
 void main()
 {
 
@@ -47,10 +68,10 @@ void main()
   /* texture for endcaps */
   vec4 text_color;
   if (uvfac[1] == ENDCAP) {
-    text_color = texture2D(myTexture, vec2(mTexCoord.x, mTexCoord.y));
+    text_color = texture_read_as_srgb(myTexture, vec2(mTexCoord.x, mTexCoord.y));
   }
   else {
-    text_color = texture2D(myTexture, mTexCoord);
+    text_color = texture_read_as_srgb(myTexture, mTexCoord);
   }
 
   /* texture */