rna function Image.scale(w, h), useful for utility functions to open/scale/save images.

3 files changed, 29 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_image.h b/source/blender/blenkernel/BKE_image.h
index 97b724c09e4..91e3e9edbf0 100644
--- a/source/blender/blenkernel/BKE_image.h
+++ b/source/blender/blenkernel/BKE_image.h
@@ -183,6 +183,9 @@ struct Image *BKE_image_copy(struct Image *ima);
 /* merge source into dest, and free source */
 void BKE_image_merge(struct Image *dest, struct Image *source);
 
+/* scale the image */
+void BKE_image_scale(struct Image *image, int width, int height);
+
 /* check if texture has alpha (depth=32) */
 int BKE_image_has_alpha(struct Image *image);
 
diff --git a/source/blender/blenkernel/intern/image.c b/source/blender/blenkernel/intern/image.c
index 6ee15409857..91eed8b0b60 100644
--- a/source/blender/blenkernel/intern/image.c
+++ b/source/blender/blenkernel/intern/image.c
@@ -505,6 +505,20 @@ void BKE_image_merge(Image *dest, Image *source)
 	}
 }
 
+/* note, we could be clever and scale all imbuf's but since some are mipmaps its not so simple */
+void BKE_image_scale(Image *image, int width, int height)
+{
+	ImBuf *ibuf;
+	void *lock;
+
+	ibuf = BKE_image_acquire_ibuf(image, NULL, &lock);
+
+	IMB_scaleImBuf(ibuf, width, height);
+	ibuf->userflags |= IB_BITMAPDIRTY;
+
+	BKE_image_release_ibuf(image, lock);
+}
+
 Image *BKE_image_load(const char *filepath)
 {
 	Image *ima;
diff --git a/source/blender/makesrna/intern/rna_image_api.c b/source/blender/makesrna/intern/rna_image_api.c
index f191303a92c..3d937fc561d 100644
--- a/source/blender/makesrna/intern/rna_image_api.c
+++ b/source/blender/makesrna/intern/rna_image_api.c
@@ -178,6 +178,11 @@ static void rna_Image_update(Image *image, ReportList *reports)
 	IMB_rect_from_float(ibuf);
 }
 
+static void rna_Image_scale(Image *image, int width, int height)
+{
+	BKE_image_scale(image, width, height);
+}
+
 static int rna_Image_gl_load(Image *image, ReportList *reports, int filter, int mag)
 {
 	ImBuf *ibuf;
@@ -262,6 +267,13 @@ void RNA_api_image(StructRNA *srna)
 	RNA_def_function_ui_description(func, "Update the display image from the floating point buffer");
 	RNA_def_function_flag(func, FUNC_USE_REPORTS);
 
+	func = RNA_def_function(srna, "scale", "rna_Image_scale");
+	RNA_def_function_ui_description(func, "Scale the image in pixels");
+	parm = RNA_def_int(func, "width", 0, 1, 10000, "", "Width", 1, 10000);
+	RNA_def_property_flag(parm, PROP_REQUIRED);
+	parm = RNA_def_int(func, "height", 0, 1, 10000, "", "Height", 1, 10000);
+	RNA_def_property_flag(parm, PROP_REQUIRED);
+
 	func = RNA_def_function(srna, "gl_load", "rna_Image_gl_load");
 	RNA_def_function_ui_description(func, "Load the image into OpenGL graphics memory");
 	RNA_def_function_flag(func, FUNC_USE_REPORTS);