Adding SDL dependency and support for embbeded framebuffer lcd screen graphics through GUIslice

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "src/gilles/simulatorapi/simapi"]
 	path = src/gilles/simulatorapi/simapi
 	url = https://github.com/Spacefreak18/simapi
+[submodule "src/gilles/GUIslice"]
+	path = src/gilles/GUIslice
+	url = https://github.com/spacefreak18/GUIslice.git

CMakeLists.txt

@@ -24,7 +24,7 @@ add_subdirectory(src/gilles/helper)
 add_subdirectory(src/gilles/slog)
 
 add_executable(gilles src/gilles/gilles.c)
-target_link_libraries(gilles m ncursesw argtable2 config gameloop helper slog simulatorapi eclipse-paho-mqtt-c::paho-mqtt3c pthread json-c)
+target_link_libraries(gilles m ncursesw argtable2 config gameloop helper slog simulatorapi eclipse-paho-mqtt-c::paho-mqtt3c pthread json-c SDL SDL_ttf SDL_gfx)
 
 # used for enabling additional compiler options if supported
 include(CheckCXXCompilerFlag)

src/gilles/gameloop/CMakeLists.txt

@@ -1,10 +1,16 @@
 set(gameloop_source_files
   gameloop.c
   gameloop.h
+  wheeldash.c
+  wheeldash.h
+
+  ../GUIslice/src/GUIslice.c
+  ../GUIslice/src/GUIslice.h
+  ../GUIslice/src/GUIslice_config.h
+  ../GUIslice/src/GUIslice_drv_sdl.h
+  ../GUIslice/src/GUIslice_drv_sdl.c
 )
 
-set(LIBXML_INCLUDE_DIR /usr/include/libxml2)
-include_directories("." ${LIBXML_INCLUDE_DIR})
 
 
 add_library(gameloop STATIC ${gameloop_source_files})

src/gilles/gameloop/wheeldash.c

@@ -0,0 +1,287 @@
+#include <unistd.h>
+
+#include "SDL/SDL.h"
+#include "SDL/SDL_getenv.h"
+
+// Define the primary surface for display
+SDL_Surface* scrMain = NULL;
+//<File !Start!>
+// FILE: [FerrariF1Wheel.c]
+// Created by GUIslice Builder version: [0.17.b20]
+//
+// GUIslice Builder Generated File
+//
+// For the latest guides, updates and support view:
+// https://github.com/ImpulseAdventure/GUIslice
+//
+//<File !End!>
+//
+
+// ------------------------------------------------
+// Headers to include
+// ------------------------------------------------
+#include "../GUIslice/src/GUIslice.h"
+#include "../GUIslice/src/GUIslice_drv.h"
+
+// Include any extended elements
+//<Includes !Start!>
+//<Includes !End!>
+
+// ------------------------------------------------
+// Defines for resources
+// ------------------------------------------------
+#define MAX_PATH  255
+//<PathStorage !Start!>
+//<PathStorage !End!>
+
+// ------------------------------------------------
+// Headers and Defines for fonts
+// ------------------------------------------------
+//<Fonts !Start!>
+#define FONT_FREE_MONOB96 "/usr/share/fonts/truetype/freefont/FreeMonoBold.ttf"
+//<Fonts !End!>
+
+// ------------------------------------------------
+// Defines for resources
+// ------------------------------------------------
+//<Resources !Start!>
+//<Resources !End!>
+
+// ------------------------------------------------
+// Enumerations for pages, elements, fonts, images
+// ------------------------------------------------
+//<Enum !Start!>
+enum {E_PG_MAIN};
+enum {E_GEAR_TEXT};
+// Must use separate enum for fonts with MAX_FONT at end to use gslc_FontSet.
+enum {E_FREEMONOBOLD96PT,MAX_FONT};
+//<Enum !End!>
+
+// ------------------------------------------------
+// Instantiate the GUI
+// ------------------------------------------------
+
+// ------------------------------------------------
+// Define the maximum number of elements and pages
+// ------------------------------------------------
+//<ElementDefines !Start!>
+#define MAX_PAGE                1
+
+#define MAX_ELEM_PG_MAIN 1                                          // # Elems total on page
+#define MAX_ELEM_PG_MAIN_RAM MAX_ELEM_PG_MAIN // # Elems in RAM
+//<ElementDefines !End!>
+
+// ------------------------------------------------
+// Create element storage
+// ------------------------------------------------
+// GUI Elements
+gslc_tsGui                      m_gui;
+gslc_tsDriver                   m_drv;
+gslc_tsFont                     m_asFont[MAX_FONT];
+gslc_tsPage                     m_asPage[MAX_PAGE];
+
+//<GUI_Extra_Elements !Start!>
+gslc_tsElem                     m_asPage1Elem[MAX_ELEM_PG_MAIN_RAM];
+gslc_tsElemRef                  m_asPage1ElemRef[MAX_ELEM_PG_MAIN];
+
+
+gslc_tsElemRef* pElemRef = NULL;
+
+#define MAX_STR                 100
+
+//<GUI_Extra_Elements !End!>
+
+// ------------------------------------------------
+// Program Globals
+// ------------------------------------------------
+bool m_bQuit = false;
+
+// Save some element references for direct access
+//<Save_References !Start!>
+//<Save_References !End!>
+
+
+// Configure environment variables suitable for display
+// - These may need modification to match your system
+//   environment and display type
+// - Defaults for GSLC_DEV_FB and GSLC_DEV_TOUCH are in GUIslice_config.h
+// - Note that the environment variable settings can
+//   also be set directly within the shell via export
+//   (or init script).
+//   - eg. export TSLIB_FBDEVICE=/dev/fb1
+void UserInitEnv()
+{
+#if defined(DRV_DISP_SDL1) || defined(DRV_DISP_SDL2)
+  setenv((char*)"FRAMEBUFFER",GSLC_DEV_FB,1);
+  setenv((char*)"SDL_FBDEV",GSLC_DEV_FB,1);
+  setenv((char*)"SDL_VIDEODRIVER",GSLC_DEV_VID_DRV,1);
+#endif
+
+#if defined(DRV_TOUCH_TSLIB)
+  setenv((char*)"TSLIB_FBDEVICE",GSLC_DEV_FB,1);
+  setenv((char*)"TSLIB_TSDEVICE",GSLC_DEV_TOUCH,1);
+  setenv((char*)"TSLIB_CALIBFILE",(char*)"/etc/pointercal",1);
+  setenv((char*)"TSLIB_CONFFILE",(char*)"/etc/ts.conf",1);
+  setenv((char*)"TSLIB_PLUGINDIR",(char*)"/usr/local/lib/ts",1);
+#endif
+}
+
+// Define debug message function
+static int16_t DebugOut(char ch) { fputc(ch,stderr); return 0; }
+
+// ------------------------------------------------
+// Callback Methods
+// ------------------------------------------------
+//<Button Callback !Start!>
+//<Button Callback !End!>
+//<Checkbox Callback !Start!>
+//<Checkbox Callback !End!>
+//<Keypad Callback !Start!>
+//<Keypad Callback !End!>
+//<Spinner Callback !Start!>
+//<Spinner Callback !End!>
+//<Listbox Callback !Start!>
+//<Listbox Callback !End!>
+//<Draw Callback !Start!>
+//<Draw Callback !End!>
+//<Slider Callback !Start!>
+//<Slider Callback !End!>
+//<Tick Callback !Start!>
+//<Tick Callback !End!>
+
+// ------------------------------------------------
+// Create page elements
+// - strPath: Path to executable passed in to locate resource files
+// ------------------------------------------------
+bool InitGUI(char *strPath)
+{
+  //gslc_tsElemRef* pElemRef = NULL;
+
+//<InitGUI !Start!>
+  gslc_PageAdd(&m_gui,E_PG_MAIN,m_asPage1Elem,MAX_ELEM_PG_MAIN_RAM,m_asPage1ElemRef,MAX_ELEM_PG_MAIN);
+  // NOTE: The current page defaults to the first page added. Here we explicitly
+  //       ensure that the main page is the correct page no matter the add order.
+  gslc_SetPageCur(&m_gui,E_PG_MAIN);
+
+
+  // Set Background to a flat color
+  gslc_SetBkgndColor(&m_gui,GSLC_COL_BLACK);
+
+  // -----------------------------------
+  // PAGE: E_PG_MAIN
+
+  // Create E_GEAR_TEXT text label
+  pElemRef = gslc_ElemCreateTxt(&m_gui,E_GEAR_TEXT,E_PG_MAIN,(gslc_tsRect){140,90,33,49},
+    (char*)"N",0,E_FREEMONOBOLD96PT);
+
+  gslc_ElemSetFillEn(&m_gui,pElemRef,false);
+//<InitGUI !End!>
+
+  return true;
+}
+
+void* wheel()
+{
+  // --------------------------------------
+  // Initialization
+  // --------------------------------------
+
+  // Update the environment variables for SDL to
+  // work correctly with the external display on
+  // LINUX frame buffer 1 (fb1).
+  putenv((char*) "FRAMEBUFFER=/dev/fb1");
+  putenv((char*) "SDL_FBDEV=/dev/fb1");
+
+  // Initialize SDL
+  if (SDL_Init(SDL_INIT_VIDEO) < 0) {
+    fprintf(stderr, "ERROR in SDL_Init(): %s\n", SDL_GetError());
+    return 0;
+  }
+  atexit(SDL_Quit);
+
+  // Fetch the best video mode
+  // - Note that the Raspberry Pi generally defaults
+  //   to a 16bits/pixel framebuffer
+  const SDL_VideoInfo* vInfo = SDL_GetVideoInfo();
+  if (!vInfo) {
+    fprintf(stderr, "ERROR in SDL_GetVideoInfo(): %s\n", SDL_GetError());
+    return 0;
+  }
+  int nResX = vInfo->current_w;
+  int nResY = vInfo->current_h;
+  int nDepth = vInfo->vfmt->BitsPerPixel;
+
+  // Configure the video mode
+  // - SDL_SWSURFACE appears to be most robust mode
+  int nFlags = SDL_SWSURFACE | SDL_FULLSCREEN;
+  scrMain = SDL_SetVideoMode(nResX, nResY, nDepth, nFlags);
+  if (scrMain == 0) {
+    fprintf(stderr, "ERROR in SDL_SetVideoMode(): %s\n", SDL_GetError());
+    return 0;
+  }
+
+
+  bool              bOk = true;
+  char              acTxt[MAX_STR];
+
+  // ------------------------------------------------
+  // Initialize
+  // ------------------------------------------------
+  gslc_InitDebug(&DebugOut);
+  UserInitEnv();
+
+  if (!gslc_Init(&m_gui,&m_drv,m_asPage,MAX_PAGE,m_asFont,MAX_FONT)) { exit(1); }
+
+  // ------------------------------------------------
+  // Load Fonts
+  // ------------------------------------------------
+//<Load_Fonts !Start!>
+//
+  bOk = gslc_FontSet(&m_gui,E_FREEMONOBOLD96PT,GSLC_FONTREF_FNAME,FONT_FREE_MONOB96,96);
+  if (!bOk) { fprintf(stderr,"ERROR: FontAdd failed: %s\n",FONT_FREE_MONOB96); exit(1); }
+//<Load_Fonts !End!>
+
+  // ------------------------------------------------
+  // Create graphic elements
+  // ------------------------------------------------
+  InitGUI("."); // Pass executable path to find resource files
+
+  // ------------------------------------------------
+  // Start up display on main page
+  // ------------------------------------------------
+//<Startup !Start!>
+//<Startup !End!>
+  // ------------------------------------------------
+  // Main event loop
+  // ------------------------------------------------
+
+  m_bQuit = false;
+  while (!m_bQuit) {
+
+    // ----------------------------------------------
+    // Update GUI Elements
+    // ----------------------------------------------
+
+    //TODO - Add update code for any text, gauges, or sliders
+
+    // ----------------------------------------------
+    // Periodically call GUIslice update function
+    // ----------------------------------------------
+    gslc_Update(&m_gui);
+    sleep(2);
+    gslc_ElemSetTxtStr(&m_gui, pElemRef, "2");
+
+    gslc_Update(&m_gui);
+    sleep(2);
+    m_bQuit = true;
+  } // bQuit
+
+  // ------------------------------------------------
+  // Close down display
+  // ------------------------------------------------
+
+  gslc_Quit(&m_gui);
+
+  return 0;
+}
+

src/gilles/gameloop/wheeldash.h

@@ -0,0 +1 @@
+void* wheel(void* params);