Fix T49391: Texture paint is not aware of disabled color management

There might be some extra missing points here, but it's all rather
a TODO than a real bug and can be tweaked further once issues are
actually discovered.

1 files changed, 35 insertions, 6 deletions

diff --git a/source/blender/editors/sculpt_paint/paint_image_proj.c b/source/blender/editors/sculpt_paint/paint_image_proj.c
index 83fde4554b3..f5d115442c6 100644
--- a/source/blender/editors/sculpt_paint/paint_image_proj.c
+++ b/source/blender/editors/sculpt_paint/paint_image_proj.c
@@ -371,6 +371,8 @@ typedef struct ProjPaintState {
 	 */
 	const MLoopUV **dm_mloopuv;
 	const MLoopUV **dm_mloopuv_clone;    /* other UV map, use for cloning between layers */
+
+	bool use_colormanagement;
 } ProjPaintState;
 
 typedef union pixelPointer {
@@ -1623,7 +1625,12 @@ static ProjPixel *project_paint_uvpixel_init(
 						unsigned char rgba_ub[4];
 						float rgba[4];
 						project_face_pixel(lt_other_tri_uv, ibuf_other, w, rgba_ub, NULL);
-						srgb_to_linearrgb_uchar4(rgba, rgba_ub);
+						if (ps->use_colormanagement) {
+							srgb_to_linearrgb_uchar4(rgba, rgba_ub);
+						}
+						else {
+							rgba_uchar_to_float(rgba, rgba_ub);
+						}
 						straight_to_premul_v4_v4(((ProjPixelClone *)projPixel)->clonepx.f, rgba);
 					}
 				}
@@ -1632,7 +1639,12 @@ static ProjPixel *project_paint_uvpixel_init(
 						float rgba[4];
 						project_face_pixel(lt_other_tri_uv, ibuf_other, w, NULL, rgba);
 						premul_to_straight_v4(rgba);
-						linearrgb_to_srgb_uchar3(((ProjPixelClone *)projPixel)->clonepx.ch, rgba);
+						if (ps->use_colormanagement) {
+							linearrgb_to_srgb_uchar3(((ProjPixelClone *)projPixel)->clonepx.ch, rgba);
+						}
+						else {
+							rgb_float_to_uchar(((ProjPixelClone *)projPixel)->clonepx.ch, rgba);
+						}
 						((ProjPixelClone *)projPixel)->clonepx.ch[3] =  rgba[3] * 255;
 					}
 					else { /* char to char */
@@ -4359,7 +4371,12 @@ static void do_projectpaint_draw(
 	if (ps->is_texbrush) {
 		mul_v3_v3v3(rgb, texrgb, ps->paint_color_linear);
 		/* TODO(sergey): Support texture paint color space. */
-		linearrgb_to_srgb_v3_v3(rgb, rgb);
+		if (ps->use_colormanagement) {
+			linearrgb_to_srgb_v3_v3(rgb, rgb);
+		}
+		else {
+			copy_v3_v3(rgb, rgb);
+		}
 	}
 	else {
 		copy_v3_v3(rgb, ps->paint_color);
@@ -4957,11 +4974,21 @@ static void paint_proj_stroke_ps(
 	/* handle gradient and inverted stroke color here */
 	if (ps->tool == PAINT_TOOL_DRAW) {
 		paint_brush_color_get(scene, brush, false, ps->mode == BRUSH_STROKE_INVERT, distance, pressure,  ps->paint_color, NULL);
-		srgb_to_linearrgb_v3_v3(ps->paint_color_linear, ps->paint_color);
+		if (ps->use_colormanagement) {
+			srgb_to_linearrgb_v3_v3(ps->paint_color_linear, ps->paint_color);
+		}
+		else {
+			copy_v3_v3(ps->paint_color_linear, ps->paint_color);
+		}
 	}
 	else if (ps->tool == PAINT_TOOL_FILL) {
 		copy_v3_v3(ps->paint_color, BKE_brush_color_get(scene, brush));
-		srgb_to_linearrgb_v3_v3(ps->paint_color_linear, ps->paint_color);
+		if (ps->use_colormanagement) {
+			srgb_to_linearrgb_v3_v3(ps->paint_color_linear, ps->paint_color);
+		}
+		else {
+			copy_v3_v3(ps->paint_color_linear, ps->paint_color);
+		}
 	}
 	else if (ps->tool == PAINT_TOOL_MASK) {
 		ps->stencil_value = brush->weight;
@@ -5112,7 +5139,9 @@ static void project_state_init(bContext *C, Object *ob, ProjPaintState *ps, int
 	ps->normal_angle_inner__cos = cosf(ps->normal_angle_inner);
 
 	ps->dither = settings->imapaint.dither;
-	
+
+	ps->use_colormanagement = BKE_scene_check_color_management_enabled(CTX_data_scene(C));
+
 	return;
 }