auto generate mip levels

Author: benjamaan476

assets/shaders/MaterialShader.frag

@@ -76,6 +76,11 @@ void main() {
     } else if(in_mode == 2) {
         out_colour = vec4(abs(normal), 1.0);
     }
+    else if(in_mode == 3)
+    {
+        float mipLevel = textureQueryLod(samplers[SAMP_DIFFUSE], in_dto.tex_coord).x;
+        out_colour = vec4(0.2 * mipLevel);
+    }
 }
 
 vec4 calculate_directional_light(directional_light light, vec3 normal, vec3 view_direction) {

engine/loaders/image_loader.cpp

@@ -69,6 +69,7 @@ namespace egkr
 	    properties->id = 0;
 	    properties->data = image_data;
 	    properties->name = name;
+		properties->mip_levels = (uint32_t)std::floorf(std::log2f(std::max(width, height))) + 1;
 
 	    for (auto y{0}; y < height; ++y)
 	    {

engine/plugins/renderer/vulkan/swapchain.cpp

@@ -257,7 +257,8 @@ namespace egkr
 		    .usage = vk::ImageUsageFlagBits::eTransferSrc | vk::ImageUsageFlagBits::eTransferDst | vk::ImageUsageFlagBits::eSampled | vk::ImageUsageFlagBits::eColorAttachment,
 		    .memory_properties = vk::MemoryPropertyFlagBits::eDeviceLocal,
 		    .aspect_flags = vk::ImageAspectFlagBits::eColor,
-		    .texture_type = egkr::texture::type::texture_2d};
+		    .texture_type = egkr::texture::type::texture_2d,
+		.mip_levels = 1};
 		((vulkan_texture*)(render_textures_[i].get()))->populate_internal(depth_image_properties);
 	    }
 	}