Add support for M5Stack Cardputer

Related to #4

doomgeneric/Makefile

@@ -22,7 +22,7 @@ LIBS+=-lm -lc -lX11
 OBJDIR=build
 OUTPUT=doomgeneric
 
-SRC_DOOM = dummy.o am_map.o doomdef.o doomstat.o dstrings.o d_event.o d_items.o d_iwad.o d_loop.o d_main.o d_mode.o d_net.o f_finale.o f_wipe.o g_game.o hu_lib.o hu_stuff.o info.o i_cdmus.o i_endoom.o i_joystick.o i_scale.o i_sound.o i_system.o i_timer.o memio.o m_argv.o m_bbox.o m_cheat.o m_config.o m_controls.o m_fixed.o m_menu.o m_misc.o m_random.o p_ceilng.o p_doors.o p_enemy.o p_floor.o p_inter.o p_lights.o p_map.o p_maputl.o p_mobj.o p_plats.o p_pspr.o p_saveg.o p_setup.o p_sight.o p_spec.o p_switch.o p_telept.o p_tick.o p_user.o r_bsp.o r_data.o r_draw.o r_main.o r_plane.o r_segs.o r_sky.o r_things.o sha1.o sounds.o statdump.o st_lib.o st_stuff.o s_sound.o tables.o v_video.o wi_stuff.o w_checksum.o w_file.o w_main.o w_wad.o z_zone.o w_file_stdc.o i_input.o i_video.o doomgeneric.o doomgeneric_xlib.o
+SRC_DOOM = dummy.o am_map.o doomdef.o doomstat.o dstrings.o d_event.o d_items.o d_iwad.o d_loop.o d_main.o d_mode.o d_net.o f_finale.o f_wipe.o g_game.o hu_lib.o hu_stuff.o info.o i_cdmus.o i_endoom.o i_joystick.o i_scale.o i_sound.o i_system.o i_timer.o memio.o m_argv.o m_bbox.o m_cheat.o m_config.o m_controls.o m_fixed.o m_menu.o m_misc.o m_random.o p_ceilng.o p_doors.o p_enemy.o p_floor.o p_inter.o p_lights.o p_map.o p_maputl.o p_mobj.o p_plats.o p_pspr.o p_saveg.o p_setup.o p_sight.o p_spec.o p_switch.o p_telept.o p_tick.o p_user.o r_bsp.o r_data.o r_draw.o r_main.o r_plane.o r_segs.o r_sky.o r_things.o sha1.o sounds.o statdump.o st_lib.o st_stuff.o s_sound.o tables.o v_video.o wi_stuff.o w_checksum.o w_file.o w_main.o w_wad.o z_zone.o w_file_stdc.o i_input.o i_video.o doomgeneric.o doomgeneric_xlib.o doomgeneric_m5card.o
 OBJS += $(addprefix $(OBJDIR)/, $(SRC_DOOM))
 
 all:	 $(OUTPUT)
@@ -51,4 +51,3 @@ $(OBJDIR)/%.o:	%.c
 
 print:
 	@echo OBJS: $(OBJS)
-

doomgeneric/doomgeneric_m5card.c

@@ -0,0 +1,125 @@
+#include "doomkeys.h"
+#include "m_argv.h"
+#include "doomgeneric.h"
+
+#include <M5Unified.h>
+#include <M5Cardputer.h>
+#include <M5GFX.h>
+
+#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 int key)
+{
+  switch (key)
+  {
+  case M5Cardputer::Key::Enter:
+    return KEY_ENTER;
+  case M5Cardputer::Key::Escape:
+    return KEY_ESCAPE;
+  case M5Cardputer::Key::Left:
+    return KEY_LEFTARROW;
+  case M5Cardputer::Key::Right:
+    return KEY_RIGHTARROW;
+  case M5Cardputer::Key::Up:
+    return KEY_UPARROW;
+  case M5Cardputer::Key::Down:
+    return KEY_DOWNARROW;
+  case M5Cardputer::Key::Ctrl:
+    return KEY_FIRE;
+  case M5Cardputer::Key::Space:
+    return KEY_USE;
+  case M5Cardputer::Key::Shift:
+    return KEY_RSHIFT;
+  default:
+    return tolower(key);
+  }
+}
+
+static void addKeyToQueue(int pressed, unsigned int keyCode)
+{
+  unsigned char key = convertToDoomKey(keyCode);
+  unsigned short keyData = (pressed << 8) | key;
+
+  s_KeyQueue[s_KeyQueueWriteIndex] = keyData;
+  s_KeyQueueWriteIndex++;
+  s_KeyQueueWriteIndex %= KEYQUEUE_SIZE;
+}
+
+static void handleKeyInput()
+{
+  M5Cardputer::KeyEvent e;
+  while (M5Cardputer::pollEvent(e))
+  {
+    if (e.type == M5Cardputer::KeyEvent::KeyDown)
+    {
+      addKeyToQueue(1, e.key);
+    }
+    else if (e.type == M5Cardputer::KeyEvent::KeyUp)
+    {
+      addKeyToQueue(0, e.key);
+    }
+  }
+}
+
+void DG_Init()
+{
+  M5.begin();
+  M5Cardputer::begin();
+  M5GFX::begin();
+}
+
+void DG_DrawFrame()
+{
+  M5GFX::drawBitmap(0, 0, DOOMGENERIC_RESX, DOOMGENERIC_RESY, DG_ScreenBuffer);
+  handleKeyInput();
+}
+
+void DG_SleepMs(uint32_t ms)
+{
+  delay(ms);
+}
+
+uint32_t DG_GetTicksMs()
+{
+  return millis();
+}
+
+int DG_GetKey(int *pressed, unsigned char *doomKey)
+{
+  if (s_KeyQueueReadIndex == s_KeyQueueWriteIndex)
+  {
+    return 0;
+  }
+  else
+  {
+    unsigned short keyData = s_KeyQueue[s_KeyQueueReadIndex];
+    s_KeyQueueReadIndex++;
+    s_KeyQueueReadIndex %= KEYQUEUE_SIZE;
+
+    *pressed = keyData >> 8;
+    *doomKey = keyData & 0xFF;
+
+    return 1;
+  }
+}
+
+void DG_SetWindowTitle(const char *title)
+{
+  // No window title to set for M5Stack Cardputer
+}
+
+int main(int argc, char **argv)
+{
+  doomgeneric_Create(argc, argv);
+
+  for (;;)
+  {
+    doomgeneric_Tick();
+  }
+
+  return 0;
+}