Fix #19875: drawing smoke on graphics cards that do not support

non-power-of-two textures lead to artifacts due to uninitialized
memory if the domain had a non-power-of-two size.

1 files changed, 7 insertions, 0 deletions

diff --git a/source/blender/gpu/intern/gpu_extensions.c b/source/blender/gpu/intern/gpu_extensions.c
index 5deef4a5200..48ef5fdb0aa 100644
--- a/source/blender/gpu/intern/gpu_extensions.c
+++ b/source/blender/gpu/intern/gpu_extensions.c
@@ -372,6 +372,13 @@ GPUTexture *GPU_texture_create_3D(int w, int h, int depth, float *fpixels)
 	GPU_print_error("3D glTexImage3D");
 
 	if (fpixels) {
+		if(!GPU_non_power_of_two_support() && (w != tex->w || h != tex->h || depth != tex->depth)) {
+			/* clear first to avoid unitialized pixels */
+			float *zero= MEM_callocN(sizeof(float)*tex->w*tex->h*tex->depth, "zero");
+			glTexSubImage3D(tex->target, 0, 0, 0, 0, tex->w, tex->h, tex->depth, format, type, zero);
+			MEM_freeN(zero);
+		}
+
 		glTexSubImage3D(tex->target, 0, 0, 0, 0, w, h, depth, format, type, fpixels);
 		GPU_print_error("3D glTexSubImage3D");
 	}