World textures displaying for viewport in BI.

This patch supports "Image or Movie" and "Environment map" types of world texture for the viewport.
It supports:

  - "View", "AngMap" and "Equirectangular" types of mapping.

  - Different types of texture blending (according to BI world render).

  - Same color blending as when it lacked textures (but render via glsl).

{F207734}
{F207735}

Example: {F275180}
Original author: @valentin_b4w

Regards,
Alexander (Blend4Web Team).

Reviewers: sergey, valentin_b4w, brecht, merwin

Reviewed By: merwin

Subscribers: campbellbarton, merwin, blueprintrandom, youle, a.romanov, yurikovelenov, AlexKowel, Evgeny_Rodygin

Projects: #rendering, #opengl_gfx, #bf_blender:_next

Differential Revision: https://developer.blender.org/D1414

2 files changed, 15 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_image.h b/source/blender/blenkernel/BKE_image.h
index 1d4a405a89c..aec5b0afa45 100644
--- a/source/blender/blenkernel/BKE_image.h
+++ b/source/blender/blenkernel/BKE_image.h
@@ -259,6 +259,9 @@ bool BKE_image_scale(struct Image *image, int width, int height);
 /* check if texture has alpha (depth=32) */
 bool BKE_image_has_alpha(struct Image *image);
 
+/* check if texture has gpu texture code */
+bool BKE_image_has_bindcode(struct Image *ima);
+
 void BKE_image_get_size(struct Image *image, struct ImageUser *iuser, int *width, int *height);
 void BKE_image_get_size_fl(struct Image *image, struct ImageUser *iuser, float size[2]);
 void BKE_image_get_aspect(struct Image *image, float *aspx, float *aspy);
diff --git a/source/blender/blenkernel/intern/image.c b/source/blender/blenkernel/intern/image.c
index 7c40674dd6c..d48b455ae81 100644
--- a/source/blender/blenkernel/intern/image.c
+++ b/source/blender/blenkernel/intern/image.c
@@ -657,6 +657,18 @@ bool BKE_image_scale(Image *image, int width, int height)
 	return (ibuf != NULL);
 }
 
+bool BKE_image_has_bindcode(Image *ima)
+{
+	bool has_bindcode = false;
+	for (int i = 0; i < TEXTARGET_COUNT; i++) {
+		if (ima->bindcode[i]) {
+			has_bindcode = true;
+			break;
+		}
+	}
+	return has_bindcode;
+}
+
 static void image_init_color_management(Image *ima)
 {
 	ImBuf *ibuf;