Init Repository

include/KHR/khrplatform.h

@@ -0,0 +1,290 @@
+#ifndef __khrplatform_h_
+#define __khrplatform_h_
+
+/*
+** Copyright (c) 2008-2018 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+
+/* Khronos platform-specific types and definitions.
+ *
+ * The master copy of khrplatform.h is maintained in the Khronos EGL
+ * Registry repository at https://github.com/KhronosGroup/EGL-Registry
+ * The last semantic modification to khrplatform.h was at commit ID:
+ *      67a3e0864c2d75ea5287b9f3d2eb74a745936692
+ *
+ * Adopters may modify this file to suit their platform. Adopters are
+ * encouraged to submit platform specific modifications to the Khronos
+ * group so that they can be included in future versions of this file.
+ * Please submit changes by filing pull requests or issues on
+ * the EGL Registry repository linked above.
+ *
+ *
+ * See the Implementer's Guidelines for information about where this file
+ * should be located on your system and for more details of its use:
+ *    http://www.khronos.org/registry/implementers_guide.pdf
+ *
+ * This file should be included as
+ *        #include <KHR/khrplatform.h>
+ * by Khronos client API header files that use its types and defines.
+ *
+ * The types in khrplatform.h should only be used to define API-specific types.
+ *
+ * Types defined in khrplatform.h:
+ *    khronos_int8_t              signed   8  bit
+ *    khronos_uint8_t             unsigned 8  bit
+ *    khronos_int16_t             signed   16 bit
+ *    khronos_uint16_t            unsigned 16 bit
+ *    khronos_int32_t             signed   32 bit
+ *    khronos_uint32_t            unsigned 32 bit
+ *    khronos_int64_t             signed   64 bit
+ *    khronos_uint64_t            unsigned 64 bit
+ *    khronos_intptr_t            signed   same number of bits as a pointer
+ *    khronos_uintptr_t           unsigned same number of bits as a pointer
+ *    khronos_ssize_t             signed   size
+ *    khronos_usize_t             unsigned size
+ *    khronos_float_t             signed   32 bit floating point
+ *    khronos_time_ns_t           unsigned 64 bit time in nanoseconds
+ *    khronos_utime_nanoseconds_t unsigned time interval or absolute time in
+ *                                         nanoseconds
+ *    khronos_stime_nanoseconds_t signed time interval in nanoseconds
+ *    khronos_boolean_enum_t      enumerated boolean type. This should
+ *      only be used as a base type when a client API's boolean type is
+ *      an enum. Client APIs which use an integer or other type for
+ *      booleans cannot use this as the base type for their boolean.
+ *
+ * Tokens defined in khrplatform.h:
+ *
+ *    KHRONOS_FALSE, KHRONOS_TRUE Enumerated boolean false/true values.
+ *
+ *    KHRONOS_SUPPORT_INT64 is 1 if 64 bit integers are supported; otherwise 0.
+ *    KHRONOS_SUPPORT_FLOAT is 1 if floats are supported; otherwise 0.
+ *
+ * Calling convention macros defined in this file:
+ *    KHRONOS_APICALL
+ *    KHRONOS_APIENTRY
+ *    KHRONOS_APIATTRIBUTES
+ *
+ * These may be used in function prototypes as:
+ *
+ *      KHRONOS_APICALL void KHRONOS_APIENTRY funcname(
+ *                                  int arg1,
+ *                                  int arg2) KHRONOS_APIATTRIBUTES;
+ */
+
+#if defined(__SCITECH_SNAP__) && !defined(KHRONOS_STATIC)
+#   define KHRONOS_STATIC 1
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APICALL
+ *-------------------------------------------------------------------------
+ * This precedes the return type of the function in the function prototype.
+ */
+#if defined(KHRONOS_STATIC)
+    /* If the preprocessor constant KHRONOS_STATIC is defined, make the
+     * header compatible with static linking. */
+#   define KHRONOS_APICALL
+#elif defined(_WIN32)
+#   define KHRONOS_APICALL __declspec(dllimport)
+#elif defined (__SYMBIAN32__)
+#   define KHRONOS_APICALL IMPORT_C
+#elif defined(__ANDROID__)
+#   define KHRONOS_APICALL __attribute__((visibility("default")))
+#else
+#   define KHRONOS_APICALL
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APIENTRY
+ *-------------------------------------------------------------------------
+ * This follows the return type of the function  and precedes the function
+ * name in the function prototype.
+ */
+#if defined(_WIN32) && !defined(_WIN32_WCE) && !defined(__SCITECH_SNAP__)
+    /* Win32 but not WinCE */
+#   define KHRONOS_APIENTRY __stdcall
+#else
+#   define KHRONOS_APIENTRY
+#endif
+
+/*-------------------------------------------------------------------------
+ * Definition of KHRONOS_APIATTRIBUTES
+ *-------------------------------------------------------------------------
+ * This follows the closing parenthesis of the function prototype arguments.
+ */
+#if defined (__ARMCC_2__)
+#define KHRONOS_APIATTRIBUTES __softfp
+#else
+#define KHRONOS_APIATTRIBUTES
+#endif
+
+/*-------------------------------------------------------------------------
+ * basic type definitions
+ *-----------------------------------------------------------------------*/
+#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || defined(__GNUC__) || defined(__SCO__) || defined(__USLC__)
+
+
+/*
+ * Using <stdint.h>
+ */
+#include <stdint.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif defined(__VMS ) || defined(__sgi)
+
+/*
+ * Using <inttypes.h>
+ */
+#include <inttypes.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif defined(_WIN32) && !defined(__SCITECH_SNAP__)
+
+/*
+ * Win32
+ */
+typedef __int32                 khronos_int32_t;
+typedef unsigned __int32        khronos_uint32_t;
+typedef __int64                 khronos_int64_t;
+typedef unsigned __int64        khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif defined(__sun__) || defined(__digital__)
+
+/*
+ * Sun or Digital
+ */
+typedef int                     khronos_int32_t;
+typedef unsigned int            khronos_uint32_t;
+#if defined(__arch64__) || defined(_LP64)
+typedef long int                khronos_int64_t;
+typedef unsigned long int       khronos_uint64_t;
+#else
+typedef long long int           khronos_int64_t;
+typedef unsigned long long int  khronos_uint64_t;
+#endif /* __arch64__ */
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#elif 0
+
+/*
+ * Hypothetical platform with no float or int64 support
+ */
+typedef int                     khronos_int32_t;
+typedef unsigned int            khronos_uint32_t;
+#define KHRONOS_SUPPORT_INT64   0
+#define KHRONOS_SUPPORT_FLOAT   0
+
+#else
+
+/*
+ * Generic fallback
+ */
+#include <stdint.h>
+typedef int32_t                 khronos_int32_t;
+typedef uint32_t                khronos_uint32_t;
+typedef int64_t                 khronos_int64_t;
+typedef uint64_t                khronos_uint64_t;
+#define KHRONOS_SUPPORT_INT64   1
+#define KHRONOS_SUPPORT_FLOAT   1
+
+#endif
+
+
+/*
+ * Types that are (so far) the same on all platforms
+ */
+typedef signed   char          khronos_int8_t;
+typedef unsigned char          khronos_uint8_t;
+typedef signed   short int     khronos_int16_t;
+typedef unsigned short int     khronos_uint16_t;
+
+/*
+ * Types that differ between LLP64 and LP64 architectures - in LLP64,
+ * pointers are 64 bits, but 'long' is still 32 bits. Win64 appears
+ * to be the only LLP64 architecture in current use.
+ */
+#ifdef _WIN64
+typedef signed   long long int khronos_intptr_t;
+typedef unsigned long long int khronos_uintptr_t;
+typedef signed   long long int khronos_ssize_t;
+typedef unsigned long long int khronos_usize_t;
+#else
+typedef signed   long  int     khronos_intptr_t;
+typedef unsigned long  int     khronos_uintptr_t;
+typedef signed   long  int     khronos_ssize_t;
+typedef unsigned long  int     khronos_usize_t;
+#endif
+
+#if KHRONOS_SUPPORT_FLOAT
+/*
+ * Float type
+ */
+typedef          float         khronos_float_t;
+#endif
+
+#if KHRONOS_SUPPORT_INT64
+/* Time types
+ *
+ * These types can be used to represent a time interval in nanoseconds or
+ * an absolute Unadjusted System Time.  Unadjusted System Time is the number
+ * of nanoseconds since some arbitrary system event (e.g. since the last
+ * time the system booted).  The Unadjusted System Time is an unsigned
+ * 64 bit value that wraps back to 0 every 584 years.  Time intervals
+ * may be either signed or unsigned.
+ */
+typedef khronos_uint64_t       khronos_utime_nanoseconds_t;
+typedef khronos_int64_t        khronos_stime_nanoseconds_t;
+#endif
+
+/*
+ * Dummy value used to pad enum types to 32 bits.
+ */
+#ifndef KHRONOS_MAX_ENUM
+#define KHRONOS_MAX_ENUM 0x7FFFFFFF
+#endif
+
+/*
+ * Enumerated boolean type
+ *
+ * Values other than zero should be considered to be true.  Therefore
+ * comparisons should not be made against KHRONOS_TRUE.
+ */
+typedef enum {
+    KHRONOS_FALSE = 0,
+    KHRONOS_TRUE  = 1,
+    KHRONOS_BOOLEAN_ENUM_FORCE_SIZE = KHRONOS_MAX_ENUM
+} khronos_boolean_enum_t;
+
+#endif /* __khrplatform_h_ */

makefile

@@ -0,0 +1,23 @@
+CC=gcc
+CFLAGS=-g -Wall -lm -lglfw -lGL -lX11 -lpthread -lXrandr -lXi -ldl -I./include 
+
+
+SRC=src
+OBJ=obj
+SRCS=$(wildcard $(SRC)/*.c)
+OBJS=$(patsubst $(SRC)/%.c, $(OBJ)/%.o, $(SRCS))
+
+BINDIR=bin
+BIN= $(BINDIR)/main
+
+
+all: $(BIN)
+	
+$(BIN): $(OBJS)
+	$(CC) $(CFLAGS) -o $@ $^ 
+
+$(OBJ)/%.o: $(SRC)/%.c
+	$(CC) $(CFLAGS) -c $< -o $@
+
+clean: 
+	rm bin/* obj/*

shaders/fragment1.glsl

@@ -0,0 +1,7 @@
+#version 330 core
+out vec4 FragColor;  
+in vec3 ourColor;
+  
+void main() {
+    FragColor = vec4(ourColor , 1.0);
+}

shaders/fragment2.glsl

@@ -0,0 +1,7 @@
+#version 330 core
+out vec4 FragColor;
+uniform vec4 Color;
+
+void main() {
+	FragColor = Color;
+}

shaders/vertex1.glsl

@@ -0,0 +1,10 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec3 aColor;
+
+out vec3 ourColor;
+
+void main() {
+    gl_Position = vec4(aPos, 1.0);
+    ourColor = aColor;
+}

shaders/vertex2.glsl

@@ -0,0 +1,6 @@
+#version 330
+layout (location = 0) in vec3 aPos;
+
+void main() {
+	gl_Position = vec4(aPos, 1.0);
+}

src/Input.c

@@ -0,0 +1,11 @@
+#include "Input.h"
+
+void key_pressed(GLFWwindow* window, int key, int scancode, int action, int mods){
+	if ( key == GLFW_KEY_ESCAPE && action == GLFW_PRESS){
+		glfwSetWindowShouldClose(window, true);	
+	}
+	if ( key == GLFW_KEY_Q && action == GLFW_PRESS ){
+		glfwSetWindowShouldClose(window, true);
+	}
+
+}

src/Input.h

@@ -0,0 +1,12 @@
+#ifndef INPUT
+#define INPUT
+
+#include <GLFW/glfw3.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+void key_pressed();
+
+
+#endif

src/Renderer.c

@@ -0,0 +1,117 @@
+#include "Renderer.h"
+
+GLFWwindow* initOpenGL() {
+	
+	glfwInit();
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+
+	GLFWwindow* window = glfwCreateWindow(800, 600, "Hello World", NULL, NULL);
+	if(window == NULL) {
+		printf("Failed to create a window\n");
+		glfwTerminate();
+		exit(-1);
+	}
+
+	glfwMakeContextCurrent(window);
+	glfwSetFramebufferSizeCallback(window, WindowGotResized);
+
+	if(!gladLoadGLLoader( (GLADloadproc) glfwGetProcAddress )) {
+		printf("Failed to initialize GLAD");
+		exit(-1);
+	}
+
+	return window;
+}
+
+void WindowGotResized(GLFWwindow* window, int width, int height) {
+
+	glViewport(0, 0, width, height);
+}
+
+unsigned int compileShaderProgram(const char** vertexSrc, const char** fragmentSrc) {
+	unsigned int vertexShader;
+	vertexShader = glCreateShader(GL_VERTEX_SHADER);
+	glShaderSource(vertexShader, 1, vertexSrc, NULL);
+	glCompileShader(vertexShader);
+
+	int vertexSuccess;
+	char infoLog[512];
+	glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &vertexSuccess);
+	if(!vertexSuccess) {
+		glGetShaderInfoLog(vertexShader, 512, NULL, infoLog);		
+		printf("SHADER::VERTEX::COMPILATION_FAILED\n %s \n", infoLog);
+	}
+
+	unsigned int fragmentShader;
+	fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
+	glShaderSource(fragmentShader, 1, fragmentSrc, NULL);
+	glCompileShader(fragmentShader);
+
+	int fragmentSuccess;
+	glGetShaderiv(fragmentShader, GL_COMPILE_STATUS, &fragmentSuccess);
+	if(!fragmentSuccess){
+		glGetShaderInfoLog(fragmentShader, 512, NULL, infoLog);
+		printf("SHADER::FRAGMENT::COMPILATION_FAILED\n %s \n", infoLog);
+	}
+
+	unsigned int shaderProgram;
+	shaderProgram = glCreateProgram();
+	glAttachShader(shaderProgram, vertexShader);
+	glAttachShader(shaderProgram, fragmentShader);
+	
+	glLinkProgram(shaderProgram);
+
+	int programSuccess;
+	glGetProgramiv(shaderProgram, GL_LINK_STATUS, &programSuccess);
+	if(!programSuccess) {
+		glGetProgramInfoLog(shaderProgram, 512, NULL, infoLog);
+		printf("SHADER::PROGRAM::LINKING_FAILED\n %s \n", infoLog);
+	}
+	glDeleteShader(vertexShader);
+	glDeleteShader(fragmentShader);
+
+	return shaderProgram;
+
+}
+
+unsigned int loadCompileShader(char* vertexPath, char* fragmentPath) {
+	FILE* vertex_file = fopen(vertexPath, "r");
+	FILE* fragment_file = fopen(fragmentPath, "r");
+	if( vertex_file == NULL || fragment_file == NULL ) {
+		printf("Failed to load shaders.\n");
+		exit(1);
+	}
+
+	struct stat vertex_stat;
+	struct stat fragment_stat;
+	stat(vertexPath, &vertex_stat);
+	stat(fragmentPath, &fragment_stat);
+
+	int vertex_length = vertex_stat.st_size;
+	int fragment_length = fragment_stat.st_size;
+	
+	char* vertex_src = (char*)malloc(vertex_length+1);
+	char* fragment_src = (char*)malloc(fragment_length+1);
+	memset(vertex_src, 0, vertex_length+1);
+	memset(fragment_src, 0, fragment_length+1);
+
+	fread(vertex_src, sizeof(char), vertex_length, vertex_file );
+	fread(fragment_src, sizeof(char), fragment_length, fragment_file );
+	
+	vertex_src[vertex_length+1] = '\0';
+	fragment_src[fragment_length+1] = '\0';
+//	printf("%s", vertex_src);
+//	printf("%s", fragment_src);
+
+	const char* vertexSrc = vertex_src;
+	const char* fragmentSrc = fragment_src;
+	
+	unsigned int shaderProgram;
+	shaderProgram = compileShaderProgram(&vertexSrc, &fragmentSrc);
+	free(fragment_src);
+	free(vertex_src);
+
+	return shaderProgram;
+}

src/Renderer.h

@@ -0,0 +1,20 @@
+#ifndef OPENGLINITIALIZATION
+#define OPENGLINITIALIZATION
+
+#include <glad/glad.h>
+#include <GLFW/glfw3.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <string.h>
+
+GLFWwindow* initOpenGL();
+
+void WindowGotResized(GLFWwindow* window, int width, int height);
+
+unsigned int compileShaderProgram(const char** vertexSrc, const char** fragmentSrc);
+
+unsigned int loadCompileShader(char* vertexPath, char* fragmentPath);
+
+#endif

src/main.c

@@ -0,0 +1,85 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+#include <stdbool.h>
+
+#include "Renderer.h"
+#include "Input.h"
+
+
+int main() {
+	GLFWwindow* window;
+	window = initOpenGL();
+
+	glfwSetKeyCallback(window, &key_pressed);
+
+	float vertices[] = {
+		-0.3f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f,
+	 	 0.8f, -0.5f, 0.0f, 0.0f, 1.0f, 0.0f,
+		 0.3f,  0.5f, 0.0f, 0.0f, 0.0f, 1.0f
+	};
+	float vertices2[] = {
+		-0.8f, -0.5f, 0.0f,
+		-0.3f, -0.5f, 0.0f,
+		-0.5f,  0.5f, 0.0f
+	};
+
+	char* vertex1 = "../shaders/vertex1.glsl\0";
+	char* fragment1 = "../shaders/fragment1.glsl\0";
+	char* vertex2 = "../shaders/vertex2.glsl\0";
+	char* fragment2 = "../shaders/fragment2.glsl\0";
+
+	unsigned int shader1, shader2;
+	printf("Compiling shader1\n");
+	shader1 = loadCompileShader(vertex1, fragment1);
+	printf("Compiling shader2\n");
+	shader2 = loadCompileShader(vertex2, fragment2);
+
+	unsigned int VAOs[2], VBOs[2];
+	glGenVertexArrays(2, VAOs);
+	glGenBuffers(2, VBOs);
+	//unsigned int EBO;
+	//glGenBuffers(1, &EBO);
+
+	glBindVertexArray(VAOs[0]);
+
+	glBindBuffer(GL_ARRAY_BUFFER, VBOs[0]);
+	glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)0 );
+	glEnableVertexAttribArray(0);
+	glVertexAttribPointer(1, 3,GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)(3*sizeof(float)));
+	glEnableVertexAttribArray(1);
+	
+	glBindVertexArray(VAOs[1]);
+	glBindBuffer(GL_ARRAY_BUFFER, VBOs[1]);
+	glBufferData(GL_ARRAY_BUFFER, sizeof(vertices2), vertices2, GL_STATIC_DRAW);
+	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0 );
+	glEnableVertexAttribArray(0);
+
+	while(!glfwWindowShouldClose(window)) {
+
+		glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
+		glClear(GL_COLOR_BUFFER_BIT);
+
+		glUseProgram(shader1);
+		glBindVertexArray(VAOs[0]);
+		glDrawArrays(GL_TRIANGLES, 0, 3);
+		
+		float time = glfwGetTime();
+		float green = (sin(time) / 2.0f) + 0.5f;
+
+		int vertexColorLocation = glGetUniformLocation(shader2, "Color");
+		glUseProgram(shader2);
+		glUniform4f(vertexColorLocation, 0.0f, green, 0.0f, 1.0f);
+
+		glBindVertexArray(VAOs[1]);
+		glDrawArrays(GL_TRIANGLES, 0, 3);
+		
+
+		glfwSwapBuffers(window);
+		glfwPollEvents();
+	}
+	
+	glfwTerminate();
+	return 0;
+}