Function UpdateUserDataImage

source/userdata.cpp:134–175

// ***********************************************************************

void UpdateUserDataImage(UserData* pUserData) {
	// @todo: error if userdata type is not suitable for image data
	// i.e. must be int32 etc and 2D

	if (pUserData->img.id == SG_INVALID_ID ||
		(pUserData->dirty && pUserData->dynamic == false))
	{
		sg_image_desc imageDesc = {
			.width = pUserData->width,
			.height = pUserData->height,
			.pixel_format = SG_PIXELFORMAT_RGBA8,
		};

		// make dynamic if someone is editing this
		// image after creation
		pUserData->dynamic = false;
		if (pUserData->img.id != SG_INVALID_ID) {
			sg_destroy_image(pUserData->img);
			imageDesc.usage = SG_USAGE_STREAM;
			pUserData->dynamic = true;
		}

		sg_range pixelsData;
		pixelsData.ptr = (void*)pUserData->pData;
		pixelsData.size = pUserData->width * pUserData->height * 4 * sizeof(u8);
		imageDesc.data.subimage[0][0] = pixelsData;
		pUserData->img = sg_make_image(&imageDesc);
		pUserData->dirty = false;
	}

	// @todo: only allow one edit per frame, somehow block this
	if (pUserData->dirty && pUserData->dynamic) {
		// already dynamic, so we can just update it
		sg_range range;
		range.ptr = (void*)pUserData->pData;
		range.size = pUserData->width * pUserData->height * 4 * sizeof(u8);
		sg_image_data data;
		data.subimage[0][0] = range;
		sg_update_image(pUserData->img, data);  
	}

}

// ***********************************************************************