sdl back

CMakeLists.txt

@@ -51,13 +51,23 @@ add_executable(${DUSK_TARGET_NAME})
 # Add tools
 add_subdirectory(tools)
 
+# Add libraries
+if(DUSK_TARGET_SYSTEM STREQUAL "linux")
+  find_package(SDL2 REQUIRED)
+  find_package(OpenGL REQUIRED)
+  target_link_libraries(${DUSK_TARGET_NAME} PRIVATE 
+    SDL2::SDL2
+    OpenGL::GL
+    GL
+  )
+endif()
+
 # Add code
 add_subdirectory(src)
 
 # Include generated headers
-target_include_directories(${DUSK_TARGET_NAME}
-  PUBLIC
-    ${DUSK_GENERATED_HEADERS_DIR}
+target_include_directories(${DUSK_TARGET_NAME} PUBLIC
+  ${DUSK_GENERATED_HEADERS_DIR}
 )
 
 # Postbuild, create PBP file for PSP.

src/console/console.c

@@ -28,8 +28,6 @@ void consoleInit() {
   consolePrint(" = Dawn Console = ");
 
   #if DUSK_CONSOLE_POSIX
-
-
     threadInit(&CONSOLE.thread, consoleInputThread);
     threadMutexInit(&CONSOLE.execMutex);
     threadStartRequest(&CONSOLE.thread);
@@ -77,7 +75,9 @@ void consolePrint(const char_t *message, ...) {
 }
 
 void consoleExec(const char_t *line) {
-  threadMutexLock(&CONSOLE.execMutex);
+  #if DUSK_CONSOLE_POSIX
+    threadMutexLock(&CONSOLE.execMutex);
+  #endif
 
   assertNotNull(line, "line must not be NULL");
   assertTrue(
@@ -279,59 +279,28 @@ void consoleExec(const char_t *line) {
     }
   }
 
-  threadMutexUnlock(&CONSOLE.execMutex);
+  #if DUSK_CONSOLE_POSIX
+    threadMutexUnlock(&CONSOLE.execMutex);
+  #endif
 }
 
-// May move these later
 void consoleUpdate() {
   #if DUSK_CONSOLE_POSIX
+    threadMutexLock(&CONSOLE.execMutex);
   #endif
 
-  threadMutexLock(&CONSOLE.execMutex);
   for(uint32_t i = 0; i < CONSOLE.execBufferCount; i++) {
     consolecmdexec_t *exec = &CONSOLE.execBuffer[i];
     assertNotNull(exec->cmd, "Command execution has no command.");
     exec->cmd->function(exec);
   }
-  threadMutexUnlock(&CONSOLE.execMutex);
-
-  // #if DUSK_KEYBOARD_SUPPORT == 1
-  //   uint8_t key;
-  //   while((key = inputKeyboardPop()) != 0) {
-  //     printf("Key pressed: %c\n", key);
-  //     switch(key) {
-  //       case 0:
-  //         break;
-
-  //       case INPUT_KEY_ENTER:
-  //         consoleExec(CONSOLE.inputBuffer);
-  //         CONSOLE.inputIndex = 0;
-  //         CONSOLE.inputBuffer[0] = '\0';
-  //         break;
-
-  //       case INPUT_KEY_BACKSPACE:
-  //         if(CONSOLE.inputIndex > 0) {
-  //           CONSOLE.inputIndex--;
-  //           CONSOLE.inputBuffer[CONSOLE.inputIndex] = '\0';
-  //         }
-  //         break;
-
-  //       default:
-  //         if(
-  //           key >= INPUT_KEY_ASCII_START && key <= INPUT_KEY_ASCII_END &&
-  //           CONSOLE.inputIndex < CONSOLE_LINE_MAX - 1
-  //         ) {
-  //           CONSOLE.inputBuffer[CONSOLE.inputIndex++] = key;
-  //           CONSOLE.inputBuffer[CONSOLE.inputIndex] = '\0';
-  //         }
-  //         break;
-
-  //     }
-  //   }
-  // #endif
 
   // Clear the exec buffer
   CONSOLE.execBufferCount = 0;
+
+  #if DUSK_CONSOLE_POSIX
+    threadMutexUnlock(&CONSOLE.execMutex);
+  #endif
 }
 
 void consoleDispose(void) {
@@ -343,7 +312,6 @@ void consoleDispose(void) {
   consolePrint(" = Console shutting down = ");
 }
 
-
 #if DUSK_CONSOLE_POSIX
   void consoleInputThread(thread_t *thread) {
     assertNotNull(thread, "Thread cannot be NULL.");

src/display/CMakeLists.txt

@@ -6,5 +6,12 @@
 # Sources
 target_sources(${DUSK_TARGET_NAME}
   PRIVATE
-    render.c
-)
+    display.c
+)
+
+if(DUSK_TARGET_SYSTEM STREQUAL "linux")
+  target_compile_definitions(${DUSK_TARGET_NAME}
+    PRIVATE
+      DUSK_DISPLAY_SDL2=1
+  )
+endif()

src/display/display.c

@@ -0,0 +1,96 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "display/display.h"
+#include "console/console.h"
+
+display_t DISPLAY;
+
+errorret_t displayInit(void) {
+  #if DUSK_DISPLAY_SDL2
+    if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_GAMECONTROLLER) != 0) {
+      errorThrow("SDL Failed to Initialize: %s", SDL_GetError());
+    }
+
+    // Set OpenGL attributes (Needs to be done now or later?)
+    SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+
+    // Create window with OpenGL flag.
+    DISPLAY.window = SDL_CreateWindow(
+      "DuskSDL2",
+      SDL_WINDOWPOS_UNDEFINED,
+      SDL_WINDOWPOS_UNDEFINED,
+      DISPLAY_WINDOW_WIDTH_DEFAULT,
+      DISPLAY_WINDOW_HEIGHT_DEFAULT,
+      SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI |
+      SDL_WINDOW_OPENGL
+    );
+    if(!DISPLAY.window) {
+      errorThrow("SDL_CreateWindow failed: %s", SDL_GetError());
+    }
+
+    // Create OpenGL context
+    DISPLAY.glContext = SDL_GL_CreateContext(DISPLAY.window);
+    if(!DISPLAY.glContext) {
+      errorThrow("SDL_GL_CreateContext failed: %s", SDL_GetError());
+    }
+
+    SDL_GL_SetSwapInterval(1);
+    glDisable(GL_DEPTH_TEST);
+    glDisable(GL_CULL_FACE);
+    glDisable(GL_LIGHTING);// PSP defaults this on?
+    glShadeModel(GL_SMOOTH); // Fixes color on PSP?
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+    glEnableClientState(GL_COLOR_ARRAY);// To confirm: every frame on PSP?
+    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+    glEnableClientState(GL_VERTEX_ARRAY);
+  #endif
+  
+  // For now, we just return an OK error.
+  errorOk();
+}
+
+errorret_t displayUpdate(void) {
+  #if DUSK_DISPLAY_SDL2
+    SDL_Event event;
+    while(SDL_PollEvent(&event)) {
+      switch(event.type) {
+        case SDL_QUIT:
+          consoleExec("quit");
+          break;
+
+        default:
+          break;
+      } 
+    }
+
+    SDL_GL_SwapWindow(DISPLAY.window);
+  #endif
+
+  // For now, we just return an OK error.
+  errorOk();
+}
+
+errorret_t displayDispose(void) {
+  #if DUSK_DISPLAY_SDL2
+    if(DISPLAY.glContext) {
+      SDL_GL_DeleteContext(DISPLAY.glContext);
+      DISPLAY.glContext = NULL;
+    }
+    if(DISPLAY.window) {
+      SDL_DestroyWindow(DISPLAY.window);
+      DISPLAY.window = NULL;
+    }
+    SDL_Quit();
+  #endif
+
+  // For now, we just return an OK error.
+  errorOk();
+}

src/display/display.h

@@ -0,0 +1,54 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "error/error.h"
+
+#if DUSK_DISPLAY_SDL2
+  #include <SDL2/SDL.h>
+  #define GL_GLEXT_PROTOTYPES
+  #include <GL/gl.h>
+  #include <GL/glext.h>
+#endif
+
+#ifndef DISPLAY_WIDTH
+  #define DISPLAY_WIDTH 320
+#endif
+#ifndef DISPLAY_HEIGHT
+  #define DISPLAY_HEIGHT 240
+#endif
+
+#ifndef DISPLAY_WINDOW_WIDTH_DEFAULT
+  #define DISPLAY_WINDOW_WIDTH_DEFAULT DISPLAY_WIDTH
+#endif
+#ifndef DISPLAY_WINDOW_HEIGHT_DEFAULT
+  #define DISPLAY_WINDOW_HEIGHT_DEFAULT DISPLAY_HEIGHT
+#endif
+
+typedef struct {
+  #if DUSK_DISPLAY_SDL2
+    SDL_Window *window;
+    SDL_GLContext glContext;
+  #endif
+} display_t;
+
+extern display_t DISPLAY;
+
+/**
+ * Initializes the display system.
+ */
+errorret_t displayInit(void);
+
+/**
+ * Tells the display system to actually draw the frame.
+ */
+errorret_t displayUpdate(void);
+
+/**
+ * Disposes of the display system.
+ */
+errorret_t displayDispose(void);

src/display/render.c

@@ -1,8 +0,0 @@
-/**
- * Copyright (c) 2025 Dominic Masters
- * 
- * This software is released under the MIT License.
- * https://opensource.org/licenses/MIT
- */
-
-#include "display/render.h"

src/display/render.h

@@ -1,31 +0,0 @@
-/**
- * Copyright (c) 2025 Dominic Masters
- * 
- * This software is released under the MIT License.
- * https://opensource.org/licenses/MIT
- */
-
-#pragma once
-#include "error/error.h"
-
-#ifndef RENDER_WIDTH
-  #define RENDER_WIDTH 320
-#endif
-#ifndef RENDER_HEIGHT
-  #define RENDER_HEIGHT 240
-#endif
-
-/**
- * Initializes the rendering system.
- */
-errorret_t renderInit(void);
-
-/**
- * Tells the rendering system to actually draw the frame.
- */
-errorret_t renderDraw(void);
-
-/**
- * Disposes of the rendering system.
- */
-errorret_t renderDispose(void);

src/engine/engine.c

@@ -9,23 +9,33 @@
 #include "util/memory.h"
 #include "time/time.h"
 #include "console/console.h"
+#include "display/display.h"
 
 engine_t ENGINE;
 
-void engineInit(void) {
+errorret_t engineInit(void) {
   memoryZero(&ENGINE, sizeof(engine_t));
   ENGINE.running = true;
 
   // Init systems. Order is important.
   timeInit();
   consoleInit();
+  errorChain(displayInit());
+
+  errorOk();
 }
 
-void engineUpdate(void) {
+errorret_t engineUpdate(void) {
   timeUpdate();
   consoleUpdate();
+  errorChain(displayUpdate());
+
+  errorOk();
 }
 
-void engineDispose(void) {
+errorret_t engineDispose(void) {
+  errorChain(displayDispose());
   consoleDispose();
+
+  errorOk();
 }

src/engine/engine.h

@@ -6,7 +6,7 @@
  */
 
 #pragma once
-#include "dusk.h"
+#include "error/error.h"
 
 typedef struct {
   bool_t running;
@@ -17,14 +17,14 @@ extern engine_t ENGINE;
 /**
  * Initializes the engine.
  */
-void engineInit(void);
+errorret_t engineInit(void);
 
 /**
  * Updates the engine.
  */
-void engineUpdate(void);
+errorret_t engineUpdate(void);
 
 /**
  * Shuts down the engine.
  */
-void engineDispose(void);
+errorret_t engineDispose(void);

src/main.c

@@ -8,10 +8,27 @@
 #include "engine/engine.h"
 
 int main(int argc, char **argv) {
-  engineInit();
+  errorret_t ret;
+  ret = engineInit();
+
+  if(ret.code != ERROR_OK) {
+    errorCatch(errorPrint(ret));
+    return ret.code;
+  }
+
   do {
-    engineUpdate();
+    ret = engineUpdate();
+    if(ret.code != ERROR_OK) {
+      errorCatch(errorPrint(ret));
+      return ret.code;
+    }
   } while(ENGINE.running);
-  engineDispose();
+
+  ret = engineDispose();
+  if(ret.code != ERROR_OK) {
+    errorCatch(errorPrint(ret));
+    return ret.code;
+  }
+  
   return 0;
 }