Compiling, Linking and attaching shader/buffers

CMakeLists.txt

@@ -2,15 +2,14 @@ CMAKE_MINIMUM_REQUIRED(VERSION 3.20)
 set( CMAKE_EXPORT_COMPILE_COMMANDS on)
 project(Pacman)
 
-add_executable(Pacman src/main.c)
+add_executable(Pacman src/main.c libs/glad/src/glad.c)
 target_link_libraries( Pacman
 		       X11
 		       GL
-		       Xrandr
+		       Xrandr)
-		       
-)
 target_include_directories(Pacman
 	PRIVATE "libs/rgfw/" 
-
+	PRIVATE "libs/glad/include"
       )
 
+

libs/glad/include/KHR/khrplatform.h

@@ -0,0 +1,311 @@
+#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
+/*
+ * To support platform where unsigned long cannot be used interchangeably with
+ * inptr_t (e.g. CHERI-extended ISAs), we can use the stdint.h intptr_t.
+ * Ideally, we could just use (u)intptr_t everywhere, but this could result in
+ * ABI breakage if khronos_uintptr_t is changed from unsigned long to
+ * unsigned long long or similar (this results in different C++ name mangling).
+ * To avoid changes for existing platforms, we restrict usage of intptr_t to
+ * platforms where the size of a pointer is larger than the size of long.
+ */
+#if defined(__SIZEOF_LONG__) && defined(__SIZEOF_POINTER__)
+#if __SIZEOF_POINTER__ > __SIZEOF_LONG__
+#define KHRONOS_USE_INTPTR_T
+#endif
+#endif
+
+#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 KHRONOS_USE_INTPTR_T
+typedef intptr_t               khronos_intptr_t;
+typedef uintptr_t              khronos_uintptr_t;
+#elif defined(_WIN64)
+typedef signed   long long int khronos_intptr_t;
+typedef unsigned long long int khronos_uintptr_t;
+#else
+typedef signed   long  int     khronos_intptr_t;
+typedef unsigned long  int     khronos_uintptr_t;
+#endif
+
+#if defined(_WIN64)
+typedef signed   long long int khronos_ssize_t;
+typedef unsigned long long int khronos_usize_t;
+#else
+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_ */

src/main.c

@@ -1,6 +1,8 @@
 #define RGFW_IMPLEMENTATION
 #define RGFW_OPENGL
+
 #include "RGFW.h"
+#include <glad/glad.h>
 #include <stdio.h>
 
 void keyfunc (RGFW_window* win, RGFW_key key, u8 keychar, RGFW_keymod keymod, RGFW_bool repeat, RGFW_bool pressed){
@@ -9,25 +11,142 @@ void keyfunc (RGFW_window* win, RGFW_key key, u8 keychar, RGFW_keymod keymod, RG
     RGFW_window_setShouldClose(win, 1);
   }
 }
+RGFW_window* SetupWindow(){
+	RGFW_glHints* hints = RGFW_getGlobalHints_OpenGL();
+	hints->major = 4;
+	hints->minor = 6;
+	RGFW_setGlobalHints_OpenGL(hints); 
+	RGFW_window* win = RGFW_createWindow("PACMAN CLONE", 0,0, 800, 600, RGFW_windowCenter | RGFW_windowNoResize | RGFW_windowOpenGL | RGFW_windowHide);
+	RGFW_window_createContext_OpenGL(win, hints);
+	RGFW_window_show(win);
+	
+	RGFW_setKeyCallback(keyfunc);
+	RGFW_window_makeCurrentContext_OpenGL(win);
+
+	// Initialize GLAD
+	if(!gladLoadGLLoader((GLADloadproc)RGFW_getProcAddress_OpenGL)){
+	      printf("Failed to load GLAD!" );
+	      return NULL;
+	    }
+	return win;
+}
+
+long stat_GetSize(FILE* file ) {
+  fseek(file, 0, SEEK_END);
+  long size = ftell(file);
+  fseek(file, 0, SEEK_SET); // Reset to the beginning
+  return size;
+}
+char* LoadFile(const char* Path)
+{
+  FILE* fptr;
+  fptr = fopen(Path, "r");
+  if( !fptr ){
+    printf("Failed to open file" ) ;
+    return NULL;
+  }
+  long size = stat_GetSize(fptr);
+  char* text = malloc(sizeof(char) * size);
+  fread(text , size , 1, fptr);
+  fclose(fptr);
+  return text;
+}
+
+
+uint CompileShader (const char* FilePath , GLenum ShaderType ) {
+  char* shdr_text = LoadFile(FilePath);
+  uint shader = glCreateShader(ShaderType);
+  glShaderSource(shader, 1, (const char**)&shdr_text, NULL); 
+  glCompileShader(shader);
+  int status;
+  char info[512];
+  glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
+  if(!status){
+    glGetShaderInfoLog(shader,512, NULL, info);
+    const char* typename = ShaderType == GL_VERTEX_SHADER ? "VERTEX" : "FRAGMENT";
+    printf("ERROR::SHADER::%s::COMPILATION %s\n", typename, info);
+  }
+  free(shdr_text);
+  return shader;
+}
+
+
+float vertices[] = {
+  0.5f, 0.5f, 0.0f,
+  0.5f, -0.5f, 0.0f,
+  -0.5f, -0.5f, 0.0f,
+  -0.5f, 0.5f, 0.0f,
+};
+
+uint indices[] = {
+  0,1,3,
+  1,2,3
+};
+
+struct {
+  unsigned int shaderProgram;
+  unsigned int VAO;
+  unsigned int EBO;
+  unsigned int VBO;
+} RenderVariables;  
+
+void Setup(){
+  // Load Vertex Shader
+  uint vert_shader = CompileShader("shader.v", GL_VERTEX_SHADER);
+  // Load Fragment Shader
+  uint frag_shader = CompileShader("shader.f", GL_FRAGMENT_SHADER);
+
+  RenderVariables.shaderProgram = glCreateProgram();
+  glAttachShader(RenderVariables.shaderProgram, vert_shader);
+  glAttachShader(RenderVariables.shaderProgram, frag_shader);
+
+  glLinkProgram(RenderVariables.shaderProgram);
+  int success;
+  glGetProgramiv(RenderVariables.shaderProgram, GL_LINK_STATUS, &success);
+  if(!success){
+    char log[512];
+    glGetProgramInfoLog(RenderVariables.shaderProgram, 512, NULL, log);
+    printf("LINK ERROR SHADERPROGRAM", log); 
+  }
+  glDeleteShader(vert_shader);
+  glDeleteShader(frag_shader);
+
+  glGenVertexArrays(1,&RenderVariables.VAO);
+  glGenBuffers(1,&RenderVariables.VBO);
+  glGenBuffers(1,&RenderVariables.EBO);
+
+  glBindVertexArray(RenderVariables.VAO);
+
+  glBindBuffer(GL_ARRAY_BUFFER, RenderVariables.EBO);
+  glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+
+  glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, RenderVariables.EBO);
+  glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
+
+  glVertexAttribPointer(0,3,GL_FLOAT,GL_FALSE, 3* sizeof(float), (void*)0);
+  glEnableVertexAttribArray(0);
+
+  glBindBuffer(GL_ARRAY_BUFFER, 0 ); 
+  glBindVertexArray(0);
+}
 
 int main (int argc, char **argv){
-	RGFW_window* win = RGFW_createWindow("PACMAN CLONE", 0,0, 800, 600, RGFW_windowCenter | RGFW_windowNoResize | RGFW_windowOpenGL);
+	RGFW_window* win = SetupWindow();
-	RGFW_setKeyCallback(keyfunc);
+	Setup();
-
 	while ( RGFW_window_shouldClose(win) == RGFW_FALSE){
 	  RGFW_event event;
 	  RGFW_pollEvents();
 	  
+	  glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+	  glClear(GL_COLOR_BUFFER_BIT);
 
-
+	  glUseProgram(RenderVariables.shaderProgram);
-	  
+	  glBindVertexArray(RenderVariables.VAO);
-
+	  glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
+	  RGFW_window_swapBuffers_OpenGL(win);
 
 
 	}
-
-	
-
 	RGFW_window_close(win);
 	
 	return 0;