More cleaning, small issue with copy by value sprites and textures. CL is spitting out erros that it isn't supposed to be able to spit out

include/OpenCL.h

@@ -32,7 +32,7 @@ class OpenCL {
 	
 public:
 
-	OpenCL(sf::Vector2i resolution);
+	OpenCL();
 	~OpenCL();
 
 	// command queues are associated with a device and context, so for multi-gpu applications you would need
@@ -45,14 +45,27 @@ public:
 	// kernels on one or more devices specified in the context.
 	// - Contexts cannot be created using more than one platform!
 
+	bool init();
 
+	bool compile_kernel(std::string kernel_path, std::string kernel_name);
 
-	bool init(sf::Vector4f *range);
+	// Create an image buffer from an SF texture. Access Type is the read/write specifier required by OpenCL
+	bool create_image_buffer(std::string buffer_name, sf::Texture* texture, cl_int access_type);
 
-	void run_kernel(std::string kernel_name);
+	// Have CL create and manage the texture for the image buffer. Access Type is the read/write specifier required by OpenCL
+	bool create_image_buffer(std::string buffer_name, sf::Vector2i size, cl_int access_type);
 
-	void draw(sf::RenderWindow *window);
+	// 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 access flags
+	int create_buffer(std::string buffer_name, cl_uint size, void* data, cl_mem_flags flags);
+
+	int set_kernel_arg(std::string kernel_name, int index, std::string buffer_name);
+	
+	void run_kernel(std::string kernel_name, sf::Vector2i work_size);
 
+	void draw(sf::RenderWindow *window);
 
 	class device {
 
@@ -72,7 +85,8 @@ public:
 		#pragma pack(pop)
 		
 		device(cl_device_id device_id, cl_platform_id platform_id);
-		void print(std::ostream& stream);
+		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; };
@@ -92,21 +106,9 @@ public:
 
 private:
 
-	bool load_config();
-	void save_config();
-
-	std::vector<device> device_list;
-
-
-	std::vector<std::pair<cl_platform_id, std::vector<cl_device_id>>> platforms_and_devices;
-
 
 	int error = 0;
 
-	// Sprite and texture that is shared between CL and GL
-	sf::Sprite viewport_sprite;
-	sf::Texture viewport_texture;
-	sf::Vector2i viewport_resolution;
 
 	// The device which we have selected according to certain criteria
 	cl_platform_id platform_id;
@@ -119,41 +121,27 @@ private:
 	// Maps which contain a mapping from "name" to the host side CL memory object
 	std::unordered_map<std::string, cl_kernel> kernel_map;
 	std::unordered_map<std::string, cl_mem> buffer_map;
+	std::unordered_map<std::string, std::pair<sf::Sprite, sf::Texture>> image_map;
+	std::vector<device> device_list;
 
-	// Query the hardware on this machine and select the best device and the platform on which it resides
-	void aquire_hardware();
+	// Query the hardware on this machine and store the devices
+	bool aquire_hardware();
 
 	// After aquiring hardware, create a shared context using platform specific CL commands
-	void create_shared_context();
+	bool create_shared_context();
 
 	// Command queues must be created with a valid context
-	void create_command_queue();
-	
-	// Compile the kernel and store it in the kernel map with the name as the key
-	bool compile_kernel(std::string kernel_path, std::string kernel_name);
-
-	// 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 access flags
-	int create_buffer(std::string buffer_name, cl_uint size, void* data, cl_mem_flags flags);
+	bool create_command_queue();
 
 
 	// Store a cl_mem object in the buffer map <string:name, cl_mem:buffer>
-	int store_buffer(cl_mem buffer, std::string buffer_name);
+	bool 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);
+	bool release_buffer(std::string buffer_name);
 
-	void assign_kernel_args();
-	int set_kernel_arg(std::string kernel_name, int index, std::string buffer_name);
+	bool load_config();
+	void save_config();
 
 	static bool vr_assert(int error_code, std::string function_name);
 	

src/OpenCL.cpp

@@ -1,10 +1,15 @@
 #include <OpenCL.h>
 #include "util.hpp"
 
+OpenCL::OpenCL() {
+}
+
+OpenCL::~OpenCL() {
+}
 
-void OpenCL::run_kernel(std::string kernel_name) {
+void OpenCL::run_kernel(std::string kernel_name, sf::Vector2i work_size) {
 
-	size_t global_work_size[2] = { static_cast<size_t>(viewport_resolution.x), static_cast<size_t>(viewport_resolution.y) };
+	size_t global_work_size[2] = { static_cast<size_t>(work_size.x), static_cast<size_t>(work_size.y) };
 
 	cl_kernel kernel = kernel_map.at(kernel_name);
 
@@ -32,49 +37,60 @@ void OpenCL::run_kernel(std::string kernel_name) {
 
 void OpenCL::draw(sf::RenderWindow *window) {
 
-	window->draw(viewport_sprite);
+	for (auto i: image_map) {
+		window->draw(i.second.first);
+	}
 }
 
-void OpenCL::aquire_hardware() {
+bool OpenCL::aquire_hardware()
+{
 
 	// Get the number of platforms
-	cl_uint plt_cnt = 0;
-	clGetPlatformIDs(0, nullptr, &plt_cnt);
+	cl_uint platform_count = 0;
+	clGetPlatformIDs(0, nullptr, &platform_count);
+
+	if (platform_count == 0) {
+		std::cout << "There appears to be no OpenCL platforms on this machine" << std::endl;
+		return false;
+	}
 
 	// Get the ID's for those platforms
-	std::vector<cl_platform_id> plt_buf(plt_cnt);
-	clGetPlatformIDs(plt_cnt, plt_buf.data(), nullptr);
+	std::vector<cl_platform_id> plt_buf(platform_count);
 
-	// Populate the storage vector with the platform id's
-	for (auto id : plt_buf) {
-		platforms_and_devices.push_back(std::make_pair(id, std::vector<cl_device_id>()));
-	}
+	clGetPlatformIDs(platform_count, plt_buf.data(), nullptr);
+	if (vr_assert(error, "clGetPlatformIDs"))
+		return false;
 
-	int device_position = 0;
-	for (unsigned int i = 0; i < plt_cnt; i++) {
+	// Cycle through the platform ID's
+	for (unsigned int i = 0; i < platform_count; i++) {
 
+		// And get their device count
 		cl_uint deviceIdCount = 0;
 		error = clGetDeviceIDs(plt_buf[i], CL_DEVICE_TYPE_ALL, 0, nullptr, &deviceIdCount);
+		if (vr_assert(error, "clGetDeviceIDs"))
+			return false;
 
-		// Check to see if we even have OpenCL on this machine
 		if (deviceIdCount == 0) {
-			std::cout << "There appears to be no devices, or none at least supporting OpenCL" << std::endl;
-			return;
-		}
+			std::cout << "There appears to be no devices associated with this platform" << std::endl;
 		
-		// Get the device ids
-		std::vector<cl_device_id> deviceIds(deviceIdCount);
-		error = clGetDeviceIDs(plt_buf[i], CL_DEVICE_TYPE_ALL, deviceIdCount, deviceIds.data(), NULL);
+		} else {
 
-		for (int d = 0; d < deviceIds.size(); d++) {
+			// Get the device ids and place them in the device list
+			std::vector<cl_device_id> deviceIds(deviceIdCount);
 			
-			device_list.emplace_back(device(deviceIds[d], plt_buf.at(i)));
+			error = clGetDeviceIDs(plt_buf[i], CL_DEVICE_TYPE_ALL, deviceIdCount, deviceIds.data(), NULL);
+			if (vr_assert(error, "clGetDeviceIDs"))
+				return false;
 
+			for (int d = 0; d < deviceIds.size(); d++) {
+				device_list.emplace_back(device(deviceIds[d], plt_buf.at(i)));
+			}
 		}
 	}
+
 }
 
-void OpenCL::create_shared_context() {
+bool OpenCL::create_shared_context() {
 
 	// Hurray for standards!
 	// Setup the context properties to grab the current GL context
@@ -110,6 +126,11 @@ void OpenCL::create_shared_context() {
 		0
 	};
 
+#elif
+
+	std::cout << "Target machine not supported for cl_khr_gl_sharing" << std::endl;
+	return false;
+
 #endif
 
 	// Create our shared context
@@ -122,26 +143,29 @@ void OpenCL::create_shared_context() {
 	);
 
 	if (vr_assert(error, "clCreateContext"))
-		return;
+		return false;
+
+	return true;
 
 }
 
-void OpenCL::create_command_queue() {
+bool OpenCL::create_command_queue() {
 
-	// If context and device_id have initialized
+	// Command queue requires a context and device id. It can also be a device ID list
+	// as long as the devices reside on the same platform
 	if (context && device_id) {
 
 		command_queue = clCreateCommandQueue(context, device_id, 0, &error);
-
 		if (vr_assert(error, "clCreateCommandQueue"))
-			return;
+			return false;
 	
-		return;
-	}
-	else {
-		std::cout << "Failed creating the command queue. Context or device_id not initialized";
-		return;
+	} else {
+	
+		std::cout << "Failed creating the command queue. Context or device_id not initialized" << std::endl;
+		return false;
 	}
+
+	return true;
 }
 
 bool OpenCL::compile_kernel(std::string kernel_path, std::string kernel_name) {
@@ -200,23 +224,56 @@ bool OpenCL::compile_kernel(std::string kernel_path, std::string kernel_name) {
 	return true;
 }
 
-int OpenCL::create_image_buffer(std::string buffer_name, cl_uint size, sf::Texture* texture, cl_int access_type) {
+bool OpenCL::create_image_buffer(std::string buffer_name, sf::Texture* texture, cl_int access_type) {
 	
 	if (buffer_map.count(buffer_name) > 0) {
 		release_buffer(buffer_name);
+
+		// Need to check to see if we are taking care of the texture as well
+		if (image_map.count(buffer_name) > 0)
+			image_map.erase(buffer_name);
 	}
 
-	int error;
 	cl_mem buff = clCreateFromGLTexture(
 		context, access_type, GL_TEXTURE_2D,
 		0, texture->getNativeHandle(), &error);
 
 	if (vr_assert(error, "clCreateFromGLTexture"))
-		return 1;
+		return false;
 
 	store_buffer(buff, buffer_name);
 
-	return 1;
+	return true;
+}
+
+
+bool OpenCL::create_image_buffer(std::string buffer_name, sf::Vector2i size, cl_int access_type) {
+	
+	if (buffer_map.count(buffer_name) > 0) {
+		release_buffer(buffer_name);
+
+		// Need to check to see if we are taking care of the texture as well
+		if (image_map.count(buffer_name) > 0)
+			image_map.erase(buffer_name);
+	}
+
+	sf::Texture texture;
+	texture.create(size.x, size.y);
+
+	sf::Sprite sprite(texture);
+
+	image_map[buffer_name] = std::make_pair(sprite, texture);
+
+	cl_mem buff = clCreateFromGLTexture(
+		context, access_type, GL_TEXTURE_2D,
+		0, texture.getNativeHandle(), &error);
+
+	if (vr_assert(error, "clCreateFromGLTexture"))
+		return false;
+
+	store_buffer(buff, buffer_name);
+
+	return true;
 }
 
 int OpenCL::create_buffer(std::string buffer_name, cl_uint size, void* data) {
@@ -258,45 +315,47 @@ int OpenCL::create_buffer(std::string buffer_name, cl_uint size, void* data, cl_
 
 }
 
-int OpenCL::store_buffer(cl_mem buffer, std::string buffer_name) {
+bool OpenCL::store_buffer(cl_mem buffer, std::string buffer_name) {
+	
+	if (buffer_map.count(buffer_name) > 0) {
+
+		error = clReleaseMemObject(buffer_map.at(buffer_name));
 
-	if (buffer_map.count(buffer_name)) {
-		clReleaseMemObject(buffer_map[buffer_name]);
+		if (vr_assert(error, "clReleaseMemObject")) {
+			std::cout << "Error releasing overlapping buffer : " << buffer_name;
+			std::cout << "Buffer not added";
+			return false;
+		}
 	}
 	
 	buffer_map[buffer_name] = buffer;
 
-	return 1;
+	return true;
 }
 
-int OpenCL::release_buffer(std::string buffer_name) {
+bool OpenCL::release_buffer(std::string buffer_name) {
 
 	if (buffer_map.count(buffer_name) > 0) {
 
-		int error = clReleaseMemObject(buffer_map.at(buffer_name));
+		error = clReleaseMemObject(buffer_map.at(buffer_name));
 
 		if (vr_assert(error, "clReleaseMemObject")) {
 			std::cout << "Error releasing buffer : " << buffer_name;
 			std::cout << "Buffer not removed";
-			return -1;
+			return false;
 
 		}
-		else {
-			buffer_map.erase(buffer_name);
-		}
 		
-	}
-	else {
+		buffer_map.erase(buffer_name);
+		
+	} else {
+
 		std::cout << "Error releasing buffer : " << buffer_name;
 		std::cout << "Buffer not found";
-		return -1;
+		return false;
 	}
 
-	return 1;
-}
-
-void OpenCL::assign_kernel_args() {
-
+	return true;
 }
 
 int OpenCL::set_kernel_arg(std::string kernel_name, int index, std::string buffer_name) {
@@ -315,19 +374,6 @@ int OpenCL::set_kernel_arg(std::string kernel_name, int index, std::string buffe
 	return 1;
 }
 
-OpenCL::OpenCL(sf::Vector2i resolution) : viewport_resolution(resolution){
-
-	viewport_texture.create(viewport_resolution.x, viewport_resolution.y);
-	viewport_sprite.setTexture(viewport_texture);
-
-
-}
-
-OpenCL::~OpenCL() {
-
-}
-
-
 bool OpenCL::load_config() {
 
 	std::ifstream input_file("device_config.bin", std::ios::binary | std::ios::in);
@@ -368,11 +414,10 @@ void OpenCL::save_config() {
 	output_file.close();
 }
 
-bool OpenCL::init(sf::Vector4f *range)
-{
+bool OpenCL::init() {
 	
-	// Initialize opencl up to the point where we start assigning buffers
-	aquire_hardware();
+	if (!aquire_hardware())
+		return false;
 
 	if (!load_config()) {
 
@@ -399,25 +444,14 @@ bool OpenCL::init(sf::Vector4f *range)
 		platform_id = device_list.at(selection).getPlatformId();
 
 		save_config();
-
 	}
 
-	create_shared_context();
-	
-	create_command_queue();
-
-	while (!compile_kernel("../kernels/mandlebrot.cl", "mandlebrot")) {
-		std::cin.get();
-	}
-	
-	create_image_buffer("viewport_image", viewport_texture.getSize().x * viewport_texture.getSize().x * 4 * sizeof(float), &viewport_texture, CL_MEM_WRITE_ONLY);
-	create_buffer("image_res", sizeof(sf::Vector2i), &viewport_resolution);
-	create_buffer("range", sizeof(sf::Vector4f), range, CL_MEM_READ_ONLY | CL_MEM_USE_HOST_PTR);
+	if (!create_shared_context())
+		return false;
 	
+	if (!create_command_queue())
+		return false;
 
-	set_kernel_arg("mandlebrot", 0, "image_res");
-	set_kernel_arg("mandlebrot", 1, "viewport_image");
-	set_kernel_arg("mandlebrot", 2, "range");
 
 	return true;
 }
@@ -648,7 +682,20 @@ OpenCL::device::device(cl_device_id device_id, cl_platform_id platform_id) {
 }
 
 
-void OpenCL::device::print(std::ostream& stream) {
+OpenCL::device::device(const device& d) {
+
+	// member values, copy individually
+	device_id = d.device_id;
+	platform_id = d.platform_id;
+	is_little_endian = d.is_little_endian;
+	cl_gl_sharing = d.cl_gl_sharing;
+
+	// struct so it copies by value
+	data = d.data;
+
+}
+
+void OpenCL::device::print(std::ostream& stream) const {
 		
 	stream << "\n\tDevice ID        : " << device_id << std::endl;
 	stream << "\tDevice Name      : " << data.device_name << std::endl;

src/main.cpp

@@ -24,64 +24,39 @@ float elap_time() {
 const int WINDOW_X = 1920;
 const int WINDOW_Y = 1080;
 
-float scale(float valueIn, float origMin, float origMax, float scaledMin, float scaledMax) {
-	return ((scaledMax - scaledMin) * (valueIn - origMin) / (origMax - origMin)) + scaledMin;
-}
-
-void func(int id, int count, sf::Uint8* pixels) {
-
-	for (int pixel_x = 0; pixel_x < WINDOW_X; pixel_x++) {
-
-		for (int pixel_y = (WINDOW_Y * ((float)id / count)); pixel_y < (WINDOW_Y * ((float)(id + 1) / count)); pixel_y++) {
-
-			float y0 = scale(pixel_y, 0, WINDOW_Y, -1.0f, 1.0f);
-			float x0 = scale(pixel_x, 0, WINDOW_X, -2.0f, 1.0f);
-
-			float x = 0.0;
-			float y = 0.0;
-
-			int iteration_count = 0;
-			int interation_threshold = 1000;
-
-			while (x*x + y*y < 4 && iteration_count < interation_threshold) {
-				float x_temp = x*x - y*y + x0;
-				y = 2 * x * y + y0;
-				x = x_temp;
-				iteration_count++;
-			}
-
-			sf::Color c(0, 0, scale(iteration_count, 0, 1000, 0, 255), 255);
-			int val = scale(iteration_count, 0, 1000, 0, 16777216);
-
-			pixels[(pixel_y * WINDOW_X + pixel_x) * 4 + 0] = val & 0xff;
-			pixels[(pixel_y * WINDOW_X + pixel_x) * 4 + 1] = (val >> 8) & 0xff;
-			pixels[(pixel_y * WINDOW_X + pixel_x) * 4 + 2] = (val >> 16) & 0xff;
-			pixels[(pixel_y * WINDOW_X + pixel_x) * 4 + 3] = 200;
-		}
-	}
-}
-
 enum Mouse_State {PRESSED, DEPRESSED};
 
 int main() {
 
-	std::mt19937 rng(time(NULL));
-	std::uniform_int_distribution<int> rgen(100, 400);
-
 	sf::RenderWindow window(sf::VideoMode(WINDOW_X, WINDOW_Y), "quick-sfml-template");
 	window.setFramerateLimit(60);
 
 	float physic_step = 0.166f;
 	float physic_time = 0.0f;
-
 	double frame_time = 0.0, elapsed_time = 0.0, delta_time = 0.0, accumulator_time = 0.0, current_time = 0.0;
-	fps_counter fps;
 	
-	OpenCL cl(sf::Vector2i(WINDOW_X, WINDOW_Y));
+	OpenCL cl;
 
 	sf::Vector4f range(-1.0f, 1.0f, -1.0f, 1.0f);
-	cl.init(&range);
+	sf::Vector2i window_dimensions(WINDOW_X, WINDOW_Y);
+
+	cl.init();
+	
+	while (!cl.compile_kernel("../kernels/mandlebrot.cl", "mandlebrot")) {
+		std::cin.get();
+	}
+
+	sf::Texture t;
+	t.create(WINDOW_X, WINDOW_Y);
+	sf::Sprite window_sprite(t);
 
+	cl.create_image_buffer("viewport_image", &t, CL_MEM_WRITE_ONLY);
+	cl.create_buffer("image_res", sizeof(sf::Vector2i), &window_dimensions);
+	cl.create_buffer("range", sizeof(sf::Vector4f), (void*)&range, CL_MEM_READ_ONLY | CL_MEM_USE_HOST_PTR);
+	
+	cl.set_kernel_arg("mandlebrot", 0, "image_res");
+	cl.set_kernel_arg("mandlebrot", 1, "viewport_image");
+	cl.set_kernel_arg("mandlebrot", 2, "range");
 
 	while (window.isOpen())
 	{
@@ -130,23 +105,15 @@ int main() {
 		accumulator_time += delta_time;
 
 		while (accumulator_time >= physic_step) { // While the frame has sim time, update 
-		
 			accumulator_time -= physic_step;
 			physic_time += physic_step;
-
-			// Do physics at 60fps
 		}
 
-		cl.run_kernel("mandlebrot");
-
 		window.clear(sf::Color::White);
 	
+		cl.run_kernel("mandlebrot", window_dimensions);
 		cl.draw(&window);
-
-		//window.draw(viewport_sprite);
-
-		fps.draw(&window);
-		fps.frame(delta_time);
+		window.draw(window_sprite);
 
 		window.display();