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MrFloor
2022-01-20 02:09:24 +01:00
commit c97ab16096
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290
include/KHR/khrplatform.h Normal file
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#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_ */

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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/*

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shaders/fragment1.glsl Normal file
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#version 330 core
out vec4 FragColor;
in vec3 ourColor;
void main() {
FragColor = vec4(ourColor , 1.0);
}

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shaders/fragment2.glsl Normal file
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#version 330 core
out vec4 FragColor;
uniform vec4 Color;
void main() {
FragColor = Color;
}

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shaders/vertex1.glsl Normal file
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#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;
}

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shaders/vertex2.glsl Normal file
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#version 330
layout (location = 0) in vec3 aPos;
void main() {
gl_Position = vec4(aPos, 1.0);
}

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src/Input.c Normal file
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#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);
}
}

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src/Input.h Normal file
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#ifndef INPUT
#define INPUT
#include <GLFW/glfw3.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
void key_pressed();
#endif

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src/Renderer.c Normal file
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#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;
}

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#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

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src/main.c Normal file
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#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;
}