Patch triangle fixes into occlusion

Makefile

 	@glslc -c ${NAME}.frag
 
 clean: check
-	@rm -f ${NAME}
-	@rm -f ${NAME}.png
-	@rm -f ${NAME}.vert.spv
-	@rm -f ${NAME}.frag.spv
+	@rm -f ${NAME} ${NAME}.png ${NAME}.vert.spv ${NAME}.frag.spv
 ifneq ($(target), local)
-	@ssh $(SSH_DUT) 'rm -f ~/${NAME} ~/${NAME}.png'
+	@ssh $(SSH_DUT) 'rm -f ~/${NAME} ~/${NAME}.png ~/${NAME}.vert.spv ~/${NAME}.frag.spv'
 endif
 
 check:

occlusion.cc

     VkMemoryPropertyFlags memory_property_flags) {
   for (uint32_t i = 0; i < device_memory_properties.memoryTypeCount; i++) {
     // We don't care about performance, so just choose the first mappable memory type.
-    if ((valid_image_memory_types % (1 << i)) &&
+    if ((valid_image_memory_types & (1 << i)) &&
         ((device_memory_properties.memoryTypes[i].propertyFlags & memory_property_flags) ==
         memory_property_flags)) {
       return i;
 
 inline VkDeviceMemory AllocateAndBindRenderMemory(VkPhysicalDevice physical_device,
     VkDevice device, VkImage image) {
-  return AllocateAndBindMemory(physical_device, device, image, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT);
+  return AllocateAndBindMemory(physical_device, device, image, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
 }
 
 inline VkDeviceMemory AllocateAndBindScanoutMemory(VkPhysicalDevice physical_device,

occlusion.frag

 #version 450
-#extension GL_ARB_separate_shader_objects : enable
 
 layout(location = 0) out vec4 outColor;
 

occlusion.vert

 #version 450
-#extension GL_ARB_separate_shader_objects : enable
-
-layout(location = 0) out vec3 fragColor;
 
 vec2 positions[3] = vec2[](
     vec2(0.0, -0.5),