log functions and working opengl context on windows

meson.build

@@ -5,16 +5,38 @@ cargs = [
   '-Og',
   '-g',
   ]
-if host_machine.system() == 'windows'
+
+dependencies = []
+
+link_args = []
+
+if host_machine.system() == 'linux'
+  dependencies += [
+    dependency('libglvnd')
+  ]
+elif host_machine.system() == 'windows'
+  link_args += [
+    '-lopengl32'
+  ]
+
   cargs += [
     '-DUNICODE',
     '-D__UNICODE',
     '-municode'
   ]
+
+  if build_machine.system() == 'linux'
+    link_args += [
+      '-Lvendor/wine/',
+    ]
+  endif
 endif
 
 executable(
   'scuffedcraft',
-  './src/main.c',
+  'src/main.c',
+  'src/log.c',
   c_args: cargs,
+  dependencies: dependencies,
+  link_args: link_args
   )

src/log.c

@@ -0,0 +1,17 @@
+#include <stddef.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+void log_error(char* file, size_t line, char* str) {
+    fprintf(stderr, "[ERROR] %s:%zu: %s\n", file, line, str);
+}
+
+void log_errorf(char* file, size_t line, char* fmt, ...) {
+    fprintf(stderr, "[ERROR] %s:%zu: ", file, line);
+    va_list args;
+    va_start(args, fmt);
+    vfprintf(stderr, fmt, args);
+    va_end(args);
+    fprintf(stderr, "\n");
+}
+

src/log.h

@@ -0,0 +1,12 @@
+#ifndef LOG_H_
+#define LOG_H_
+
+#include <stddef.h>
+
+#define LOG_ERROR(str) log_error(__FILE__, __LINE__, (str))
+#define LOG_ERRORF(fmt, ...) log_errorf(__FILE__, __LINE__, (fmt), __VA_ARGS__)
+
+void log_error(char* file, size_t line, char* str);
+void log_errorf(char* file, size_t line, char* fmt, ...);
+
+#endif // LOG_H_

src/main.c

@@ -5,6 +5,8 @@
 #include <windowsx.h>
 #include <winuser.h>
 
+#include "log.h"
+
 // int _main() {
 //     return 0;
 // }
@@ -21,27 +23,79 @@ void OnSize(HWND hwnd, UINT flag, int width, int height) {
 }
 
 LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
-    State* pState = NULL;
-    if (uMsg == WM_CREATE) {
-        CREATESTRUCT* pCreate = (CREATESTRUCT*) lParam;
-        pState = (State*) pCreate->lpCreateParams;
-        SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR) pState);
-    } else {
-        LONG_PTR ptr = GetWindowLongPtr(hwnd, GWLP_USERDATA);
-        pState = (State*) ptr;
-    }
+    // State* pState = NULL;
+    // if (uMsg == WM_CREATE) {
+    //     CREATESTRUCT* pCreate = (CREATESTRUCT*) lParam;
+    //     pState = (State*) pCreate->lpCreateParams;
+    //     SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR) pState);
+    // } else {
+    //     LONG_PTR ptr = GetWindowLongPtr(hwnd, GWLP_USERDATA);
+    //     pState = (State*) ptr;
+    // }
 
     switch (uMsg) {
-    case WM_LBUTTONDOWN:
-    {
-        printf("State: msg: %s, num: %d\n", pState->msg, pState->num);
+        // case WM_LBUTTONDOWN: {
+        //     printf("State: msg: %s, num: %d\n", pState->msg, pState->num);
+        //
+        //     printf("lParam: %llx\n", lParam);
+        //     int mouse_x = GET_X_LPARAM(lParam);
+        //     printf("mouse_x: %x\n", mouse_x);
+        //     int mouse_y = GET_Y_LPARAM(lParam);
+        //     printf("mouse_y: %x\n", mouse_y);
+        //     printf("x: %d y: %d\n", mouse_x, mouse_y);
+        //
+        //     return 0;
+        // }
+
+    case WM_CREATE: {
+        const PIXELFORMATDESCRIPTOR pfd = {
+            sizeof(PIXELFORMATDESCRIPTOR),
+            1,
+            PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER,
+            PFD_TYPE_RGBA,
+            32, // Color depth
+            0,
+            0,
+            0,
+            0,
+            0,
+            0,
+            0,
+            0,
+            0,
+            0,
+            0,
+            0,
+            0,
+            24, // Depth buffer bits
+            8,  // Stencil buffer bits
+            0,
+        };
+
+        HDC hdc = GetWindowDC(hwnd);
+        if (hdc == NULL) {
+            LOG_ERROR("Failed to get window DC");
+            return 1;
+        }
+        const int pixel_format = ChoosePixelFormat(hdc, &pfd);
+        if (SetPixelFormat(hdc, pixel_format, &pfd) == FALSE) {
+            LOG_ERRORF("Failed to set pixel format. Error: %d", GetLastError());
+            return 1;
+        }
 
-        printf("lParam: %llx\n", lParam);
-        int mouse_x = GET_X_LPARAM(lParam);
-        printf("mouse_x: %x\n", mouse_x);
-        int mouse_y = GET_Y_LPARAM(lParam);
-        printf("mouse_y: %x\n", mouse_y);
-        printf("x: %d y: %d\n", mouse_x, mouse_y);
+        HGLRC gl_ctx = wglCreateContext(hdc);
+        if (gl_ctx == NULL) {
+            LOG_ERRORF("Failed to create OpenGL context. Error: %d", GetLastError());
+            return 1;
+        }
+
+        if (wglMakeCurrent(hdc, gl_ctx) == FALSE) {
+            LOG_ERRORF("Failed to make OpenGL context current. Error: %d", GetLastError());
+            return 1;
+        }
+
+        // glClearColor(1.0, 1.0, 0.0, 1.0);
+        // glClear(GL_COLOR_BUFFER_BIT);
 
         return 0;
     }
@@ -62,31 +116,29 @@ LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
         }
         return 0;
 
-    case WM_SIZE:
-    {
+    case WM_SIZE: {
         int width = LOWORD(lParam);
         int height = HIWORD(lParam);
         OnSize(hwnd, (UINT) wParam, width, height);
         return 0;
     }
 
-    case WM_PAINT:
-    {
-        PAINTSTRUCT ps;
-        HDC hdc = BeginPaint(hwnd, &ps);
-
-        FillRect(hdc, &ps.rcPaint, (HBRUSH) (COLOR_WINDOW + 1));
-        RECT blue = {
-            .bottom = 100,
-            .left = 0,
-            .right = 100,
-            .top = 0
-        };
-        FillRect(hdc, &blue, (HBRUSH) (COLOR_BACKGROUND + 1));
-
-        EndPaint(hwnd, &ps);
-        return 0;
-    }
+        // case WM_PAINT: {
+        //     PAINTSTRUCT ps;
+        //     HDC hdc = BeginPaint(hwnd, &ps);
+        //
+        //     FillRect(hdc, &ps.rcPaint, (HBRUSH) (COLOR_WINDOW + 1));
+        //     RECT blue = {
+        //         .bottom = 100,
+        //         .left = 0,
+        //         .right = 100,
+        //         .top = 0
+        //     };
+        //     FillRect(hdc, &blue, (HBRUSH) (COLOR_BACKGROUND + 1));
+        //
+        //     EndPaint(hwnd, &ps);
+        //     return 0;
+        // }
     }
     return DefWindowProc(hwnd, uMsg, wParam, lParam);
 }
@@ -99,6 +151,7 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR pCmdLine,
     wc.lpfnWndProc = WindowProc;
     wc.hInstance = hInstance;
     wc.lpszClassName = CLASS_NAME;
+    wc.style = CS_OWNDC;
 
     RegisterClass(&wc);
 
@@ -124,8 +177,8 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR pCmdLine,
     );
 
     if (hwnd == NULL) {
-        printf("ERROR: hwnd was NULL\n");
-        return 0;
+        LOG_ERROR("ERROR: hwnd was NULL\n");
+        return 1;
     }
 
     ShowWindow(hwnd, nCmdShow);