Whoops

include/Hardware_Caster.h

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+#pragma once
+#include <Vector4.hpp>
+#include <vector>
+#include <iostream>
+#include <map>
+#include <string.h>
+#include "LightController.h"
+#include "map/Old_Map.h"
+#include "Camera.h"
+#include <GL/glew.h>
+#include <unordered_map>
+
+#ifdef linux
+#include <CL/cl.h>
+#include <CL/opencl.h>
+#include <GL/glx.h>
+
+#elif defined _WIN32
+#include <CL/cl_gl.h>
+#include <CL/cl.h>
+#include <CL/opencl.h>
+
+// Note: windows.h must be included before Gl/GL.h
+#include <windows.h>
+#include <GL/GL.h>
+
+#elif defined TARGET_OS_MAC
+#include <OpenGL/OpenGL.h>
+#include <OpenCL/opencl.h>
+#include <OpenGL/gl.h>
+
+#endif
+
+//struct device {
+//	cl_device_id id;
+//	cl_device_type type;
+//	cl_uint clock_frequency;
+//	char version[128];
+//	cl_platform_id platform;
+//	cl_uint comp_units;
+//	char extensions[1024];
+//	char name[256];
+//	cl_bool is_little_endian = false;
+//	bool cl_gl_sharing = false;
+//};
+
+struct device_info {
+	cl_uint cl_device_address_bits;
+	cl_bool cl_device_available;
+	cl_bool cl_device_compiler_available;
+	cl_bool cl_device_endian_little;
+	cl_bool cl_device_error_correction_support;
+	char cl_device_extensions[1024];
+	cl_ulong cl_device_global_mem_cache_size;
+	cl_uint cl_device_global_mem_cacheline_size;
+	cl_ulong cl_device_global_mem_size;
+	cl_bool cl_device_image_support;
+	size_t cl_device_image2d_max_height;
+	size_t cl_device_image2d_max_width;
+	size_t cl_device_image3d_max_depth;
+	size_t cl_device_image3d_max_height;
+	size_t cl_device_image3d_max_width;
+	cl_ulong cl_device_local_mem_size;
+	cl_uint cl_device_max_clock_frequency;
+	cl_uint cl_device_max_compute_units;
+	cl_uint cl_device_max_constant_args;
+	cl_ulong cl_device_max_constant_buffer_size;
+	cl_ulong cl_device_max_mem_alloc_size;
+	size_t cl_device_max_parameter_size;
+	cl_uint cl_device_max_read_image_args;
+	cl_uint cl_device_max_samplers;
+	size_t cl_device_max_work_group_size;
+	cl_uint cl_device_max_work_item_dimensions;
+	size_t cl_device_max_work_item_sizes[3];
+	cl_uint cl_device_max_write_image_args;
+	cl_uint cl_device_mem_base_addr_align;
+	cl_uint cl_device_min_data_type_align_size;
+	char cl_device_name[128];
+	cl_platform_id cl_device_platform;
+	cl_uint cl_device_preferred_vector_width_char;
+	cl_uint cl_device_preferred_vector_width_short;
+	cl_uint cl_device_preferred_vector_width_int;
+	cl_uint cl_device_preferred_vector_width_long;
+	cl_uint cl_device_preferred_vector_width_float;
+	cl_uint cl_device_preferred_vector_width_double;
+	char cl_device_profile[256];
+	size_t cl_device_profiling_timer_resolution;
+	cl_device_type device_type;
+	char cl_device_vendor[128];
+	cl_uint cl_device_vendor_id;
+	char cl_device_version[128];
+	char cl_driver_version[128];
+};
+
+struct raycaster_settings {
+	
+};
+
+
+struct PackedData;
+
+class Hardware_Caster
+{
+
+
+public:
+
+	enum ERROR_CODES {
+		SHARING_NOT_SUPPORTED = 800,
+		OPENCL_NOT_SUPPORTED = 801,
+		OPENCL_ERROR = 802,
+		ERR = 803
+	};
+
+	class device {
+
+	public:
+
+#pragma pack(push, 1)
+		struct packed_data {
+
+			cl_device_type device_type;
+			cl_uint clock_frequency;
+			char opencl_version[64];
+			cl_uint compute_units;
+			char device_extensions[1024];
+			char device_name[256];
+			char platform_name[128];
+		};
+#pragma pack(pop)
+
+		device(cl_device_id device_id, cl_platform_id platform_id);
+		device(const device& d);
+		void print(std::ostream& stream) const;
+		void print_packed_data(std::ostream& stream);
+
+		cl_device_id getDeviceId() const { return device_id; };
+		cl_platform_id getPlatformId() const { return platform_id; };
+
+	private:
+
+		packed_data data;
+
+		cl_device_id device_id;
+		cl_platform_id platform_id;
+
+		cl_bool is_little_endian = false;
+		bool cl_gl_sharing = false;
+
+	};
+
+
+	Hardware_Caster();
+	virtual ~Hardware_Caster();
+
+	
+	// Queries hardware, creates the command queue and context, and compiles kernel
+	int init();
+
+	// Creates a texture to send to the GPU via height and width
+	// Creates a viewport vector array via vertical and horizontal fov
+	void create_viewport(int width, int height, float v_fov, float h_fov) ;
+	
+	// Light controllers own the copy of the PackedData array.
+	// We receive a pointer to the array and USE_HOST_POINTER to map the memory to the GPU
+	void assign_lights(std::vector<PackedData> *data) ;
+
+	// We take a ptr to the map and create the map, and map_dimensions buffer for the GPU
+	void assign_map(Old_Map *map) ;
+
+	// We take a ptr to the camera and create a camera direction and position buffer
+	void assign_camera(Camera *camera) ;
+
+	// TODO: Hoist this to the base class
+	// Creates 3 buffers relating to the texture atlas: texture_atlas, atlas_dim, and tile_dim
+	// With these on the GPU we can texture any quad with an atlas tile
+	void create_texture_atlas(sf::Texture *t, sf::Vector2i tile_dim);
+	
+	// Check to make sure that the buffers have been initiated and set them as kernel args
+	void validate() ;
+
+	// Aquires the GL objects, runs the kernel, releases back the GL objects
+	void compute() ;
+
+	// Take the viewport sprite and draw it to the screen
+	void draw(sf::RenderWindow* window) ;
+
+	bool load_config();
+	void save_config();
+	// ================================== DEBUG =======================================
+	
+	// Re compile the kernel and revalidate the args
+	int debug_quick_recompile();
+
+	// Modify the viewport matrix
+	void test_edit_viewport(int width, int height, float v_fov, float h_fov);
+
+
+private:
+
+	// Iterate the devices available and choose the best one
+	// Also checks for the sharing extension
+	int acquire_platform_and_device();
+
+	bool aquire_hardware();
+
+	int query_hardware();
+
+	// With respect to the individual platforms implementation of sharing
+	// create a shared cl_gl context
+	int create_shared_context();
+
+	// Using the context and the device create a command queue for them
+	int create_command_queue();
+
+	// Buffer operations
+	// All of these functions create and store a buffer in a map with the key representing their name
+	
+	// Create an image buffer from an SF texture. Access Type is the read/write specifier required by OpenCL
+	int create_image_buffer(std::string buffer_name, cl_uint size, sf::Texture* texture, cl_int access_type);
+
+	// Create a buffer with CL_MEM_READ_ONLY and CL_MEM_COPY_HOST_PTR
+	int create_buffer(std::string buffer_name, cl_uint size, void* data);
+
+	// Create a buffer with user defined data flags
+	int create_buffer(std::string buffer_name, cl_uint size, void* data, cl_mem_flags flags);
+	
+	// Store a cl_mem object in the buffer map <string:name, cl_mem:buffer>
+	int store_buffer(cl_mem buffer, std::string buffer_name);
+
+	// Using CL release the memory object and remove the KVP associated with the buffer name
+	int release_buffer(std::string buffer_name);
+	
+	// Compile the kernel with either a full src string or by is_path=true and kernel_source = a valid path
+	int compile_kernel(std::string kernel_source, bool is_path, std::string kernel_name);
+
+	// Set the arg index for the specified kernel and buffer
+	int set_kernel_arg(std::string kernel_name, int index, std::string buffer_name);
+
+	// Run the kernel using a 1d work size
+	int run_kernel(std::string kernel_name, const int work_dim_x, const int work_dim_y);
+
+	// Run a test kernel that prints out the kernel args
+	void print_kernel_arguments();
+
+	// CL error code handler. ImGui overlaps the assert() function annoyingly so I had to rename it
+	static bool vr_assert(int error_code, std::string function_name);
+
+	cl_device_id getDeviceID();
+	cl_platform_id getPlatformID();
+	cl_context getContext();
+	cl_kernel getKernel(std::string kernel_name);
+	cl_command_queue getCommandQueue();
+
+	// Our device data
+	cl_platform_id platform_id;
+	cl_device_id device_id;
+
+	// And state
+	cl_context context;
+	cl_command_queue command_queue;
+
+	// Containers holding the kernels and buffers
+	std::map<std::string, cl_kernel> kernel_map;
+	std::map<std::string, cl_mem> buffer_map;
+	std::unordered_map<std::string, std::pair<sf::Sprite, std::unique_ptr<sf::Texture>>> image_map;
+
+	sf::Sprite viewport_sprite;
+	sf::Texture viewport_texture;
+
+	Old_Map * map = nullptr;
+	Camera *camera = nullptr;
+	//	std::vector<LightController::PackedData> *lights;
+	std::vector<PackedData> *lights;
+	int light_count = 0;
+	sf::Uint8 *viewport_image = nullptr;
+	sf::Vector4f *viewport_matrix = nullptr;
+	sf::Vector2i viewport_resolution;
+
+	int error = 0;
+
+	std::vector<device> device_list;
+
+};
+