BLI Color: YUV to/from rgb colorspace option

This commit does two things:

- Adds an option to do the calculation in different color spaces (BT601
or BT709).
- Changes the default caluclation from legacy BT601 to BT709.

This affects several areas:

- UI areas (mainly scopes)
- ViewLevelsNode
- Several other nodes that use `COM_ConvertOperation.h`

2 files changed, 4 insertions, 4 deletions

diff --git a/source/blender/editors/interface/interface_draw.c b/source/blender/editors/interface/interface_draw.c
index 9a05c12e00a..7583dc654bb 100644
--- a/source/blender/editors/interface/interface_draw.c
+++ b/source/blender/editors/interface/interface_draw.c
@@ -831,7 +831,7 @@ static void vectorscope_draw_target(float centerx, float centery, float diam, co
 	float tangle = 0.f, tampli;
 	float dangle, dampli, dangle2, dampli2;
 
-	rgb_to_yuv(colf[0], colf[1], colf[2], &y, &u, &v);
+	rgb_to_yuv(colf[0], colf[1], colf[2], &y, &u, &v, BLI_YUV_ITU_BT709);
 	if (u > 0 && v >= 0) tangle = atanf(v / u);
 	else if (u > 0 && v < 0) tangle = atanf(v / u) + 2.0f * (float)M_PI;
 	else if (u < 0) tangle = atanf(v / u) + (float)M_PI;
diff --git a/source/blender/editors/space_image/image_draw.c b/source/blender/editors/space_image/image_draw.c
index 4d4beb07f00..594938b82aa 100644
--- a/source/blender/editors/space_image/image_draw.c
+++ b/source/blender/editors/space_image/image_draw.c
@@ -360,11 +360,11 @@ void ED_image_draw_info(Scene *scene, ARegion *ar, bool color_manage, bool use_d
 	if (channels == 1) {
 		if (fp) {
 			rgb_to_hsv(fp[0], fp[0], fp[0], &hue, &sat, &val);
-			rgb_to_yuv(fp[0], fp[0], fp[0], &lum, &u, &v);
+			rgb_to_yuv(fp[0], fp[0], fp[0], &lum, &u, &v, BLI_YUV_ITU_BT709);
 		}
 		else if (cp) {
 			rgb_to_hsv((float)cp[0] / 255.0f, (float)cp[0] / 255.0f, (float)cp[0] / 255.0f, &hue, &sat, &val);
-			rgb_to_yuv((float)cp[0] / 255.0f, (float)cp[0] / 255.0f, (float)cp[0] / 255.0f, &lum, &u, &v);
+			rgb_to_yuv((float)cp[0] / 255.0f, (float)cp[0] / 255.0f, (float)cp[0] / 255.0f, &lum, &u, &v, BLI_YUV_ITU_BT709);
 		}
 		
 		BLI_snprintf(str, sizeof(str), "V:%-.4f", val);
@@ -379,7 +379,7 @@ void ED_image_draw_info(Scene *scene, ARegion *ar, bool color_manage, bool use_d
 	}
 	else if (channels >= 3) {
 		rgb_to_hsv(finalcol[0], finalcol[1], finalcol[2], &hue, &sat, &val);
-		rgb_to_yuv(finalcol[0], finalcol[1], finalcol[2], &lum, &u, &v);
+		rgb_to_yuv(finalcol[0], finalcol[1], finalcol[2], &lum, &u, &v, BLI_YUV_ITU_BT709);
 
 		BLI_snprintf(str, sizeof(str), "H:%-.4f", hue);
 		BLF_position(blf_mono_font, dx, dy, 0);