ported to soso os

doomgeneric/doomgeneric_soso.c

@@ -0,0 +1,207 @@
+//doomgeneric for soso os
+
+#include "doomkeys.h"
+
+#include "doomgeneric.h"
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <sosousdk.h>
+#include "../kernel/termios.h"
+
+static int FrameBufferFd = -1;
+static int* FrameBuffer = 0;
+
+static int KeyboardFd = -1;
+
+#define KEYQUEUE_SIZE 16
+
+static unsigned short s_KeyQueue[KEYQUEUE_SIZE];
+static unsigned int s_KeyQueueWriteIndex = 0;
+static unsigned int s_KeyQueueReadIndex = 0;
+
+static unsigned char convertToDoomKey(unsigned char scancode)
+{
+    unsigned char key = 0;
+
+    switch (scancode)
+    {
+    case 0x9C:
+    case 0x1C:
+        key = KEY_ENTER;
+        break;
+    case 0x01:
+        key = KEY_ESCAPE;
+        break;
+    case 0xCB:
+    case 0x4B:
+        key = KEY_LEFTARROW;
+        break;
+    case 0xCD:
+    case 0x4D:
+        key = KEY_RIGHTARROW;
+        break;
+    case 0xC8:
+    case 0x48:
+        key = KEY_UPARROW;
+        break;
+    case 0xD0:
+    case 0x50:
+        key = KEY_DOWNARROW;
+        break;
+    case 0x1D:
+        key = KEY_FIRE;
+        break;
+    case 0x39:
+        key = KEY_USE;
+        break;
+    case 0x2A:
+    case 0x36:
+        key = KEY_RSHIFT;
+        break;
+    default:
+        break;
+    }
+
+    return key;
+}
+
+static void addKeyToQueue(int pressed, unsigned char keyCode)
+{
+        unsigned char key = convertToDoomKey(keyCode);
+
+        unsigned short keyData = (pressed << 8) | key;
+
+        s_KeyQueue[s_KeyQueueWriteIndex] = keyData;
+        s_KeyQueueWriteIndex++;
+        s_KeyQueueWriteIndex %= KEYQUEUE_SIZE;
+}
+
+
+struct termios orig_termios;
+
+void disableRawMode() {
+  //printf("returning original termios\n");
+  tcsetattr(STDIN_FILENO, TCSAFLUSH, &orig_termios);
+}
+
+void enableRawMode() {
+  tcgetattr(STDIN_FILENO, &orig_termios);
+  atexit(disableRawMode);
+  struct termios raw = orig_termios;
+  raw.c_lflag &= ~(ECHO | ICANON);
+  //raw.c_lflag &= ~(ECHO);
+  raw.c_cc[VMIN] = 0;
+  tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw);
+}
+
+void DG_Init()
+{
+    FrameBufferFd = open("/dev/fb0", 0);
+
+    if (FrameBufferFd >= 0)
+    {
+        FrameBuffer = mmap(NULL, DOOMGENERIC_RESX * DOOMGENERIC_RESY * 4, 0, FrameBufferFd, 0);
+
+        if (FrameBuffer != (int*)-1)
+        {
+            printf("mmap success\n");
+        }
+        else
+        {
+            printf("mmap failed\n");
+        }
+    }
+    else
+    {
+        printf("opening device failed!\n");
+    }
+
+    enableRawMode();
+
+    KeyboardFd = open("/dev/keyboard", 0);
+
+    if (KeyboardFd >= 0)
+    {
+        //enter non-blocking mode
+        syscall_ioctl(KeyboardFd, 1, (void*)1);
+    }
+}
+
+static void handleKeyInput()
+{
+    if (KeyboardFd < 0)
+    {
+        return;
+    }
+
+    unsigned char scancode = 0;
+
+    if (read(KeyboardFd, &scancode, 1) > 0)
+    {
+        unsigned char keyRelease = (0x80 & scancode);
+
+        scancode = (0x7F & scancode);
+
+        //printf("scancode:%x pressed:%d\n", scancode, 0 == keyRelease);
+
+        if (0 == keyRelease)
+        {
+            addKeyToQueue(1, scancode);
+        }
+        else
+        {
+            addKeyToQueue(0, scancode);
+        }
+    }
+}
+
+void DG_DrawFrame()
+{
+    if (FrameBuffer)
+    {
+        //memcpy(FrameBuffer, DG_ScreenBuffer, DOOMGENERIC_RESX * DOOMGENERIC_RESY * 4);
+
+        const int screenWidth = 1024;
+
+        for (int i = 0; i < DOOMGENERIC_RESY; ++i)
+        {
+            memcpy(FrameBuffer + i * screenWidth, DG_ScreenBuffer + i * DOOMGENERIC_RESX, DOOMGENERIC_RESX * 4);
+        }
+    }
+
+    handleKeyInput();
+}
+
+void DG_SleepMs(uint32_t ms)
+{
+    sleepMilliseconds(ms);
+}
+
+uint32_t DG_GetTicksMs()
+{
+    return getUptimeMilliseconds();
+}
+
+int DG_GetKey(int* pressed, unsigned char* doomKey)
+{
+    if (s_KeyQueueReadIndex == s_KeyQueueWriteIndex)
+    {
+        //key queue is empty
+
+        return 0;
+    }
+    else
+    {
+        unsigned short keyData = s_KeyQueue[s_KeyQueueReadIndex];
+        s_KeyQueueReadIndex++;
+        s_KeyQueueReadIndex %= KEYQUEUE_SIZE;
+
+        *pressed = keyData >> 8;
+        *doomKey = keyData & 0xFF;
+
+        return 1;
+    }
+}