checkkeys will now render text that is input

Also added test functions for multi-line debug text display

Currently this only supports ASCII, as the font doesn't have the correct Latin-1 characters

test/checkkeys.c

@@ -24,8 +24,12 @@
 #endif
 
 #include "SDL.h"
+#include "SDL_test_font.h"
 
-int done;
+static SDL_Window *window;
+static SDL_Renderer *renderer;
+static SDLTest_TextWindow *textwin;
+static int done;
 
 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
 static void
@@ -163,6 +167,18 @@ loop()
         case SDL_KEYDOWN:
         case SDL_KEYUP:
             PrintKey(&event.key.keysym, (event.key.state == SDL_PRESSED) ? SDL_TRUE : SDL_FALSE, (event.key.repeat) ? SDL_TRUE : SDL_FALSE);
+            if (event.type == SDL_KEYDOWN) {
+                switch (event.key.keysym.sym) {
+                case SDLK_BACKSPACE:
+                    SDLTest_TextWindowAddText(textwin, "\b");
+                    break;
+                case SDLK_RETURN:
+                    SDLTest_TextWindowAddText(textwin, "\n");
+                    break;
+                default:
+                    break;
+                }
+            }
             break;
         case SDL_TEXTEDITING:
             PrintText("EDIT", event.edit.text);
@@ -173,6 +189,7 @@ loop()
             break;
         case SDL_TEXTINPUT:
             PrintText("INPUT", event.text.text);
+            SDLTest_TextWindowAddText(textwin, "%s", event.text.text);
             break;
         case SDL_FINGERDOWN:
             if (SDL_IsTextInputActive()) {
@@ -204,6 +221,13 @@ loop()
             break;
         }
     }
+
+    SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
+    SDL_RenderClear(renderer);
+    SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
+    SDLTest_TextWindowDisplay(textwin, renderer);
+    SDL_RenderPresent(renderer);
+
 #ifdef __EMSCRIPTEN__
     if (done) {
         emscripten_cancel_main_loop();
@@ -214,9 +238,6 @@ loop()
 int
 main(int argc, char *argv[])
 {
-    SDL_Window *window;
-    SDL_Renderer *renderer;
-
     /* Enable standard application logging */
     SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
 
@@ -242,11 +263,14 @@ main(int argc, char *argv[])
         quit(2);
     }
 
-    /* On wayland, no window will actually show until something has
-       actually been displayed.
-    */
     renderer = SDL_CreateRenderer(window, -1, 0);
-    SDL_RenderPresent(renderer);
+    if (!renderer) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create renderer: %s\n",
+                SDL_GetError());
+        quit(2);
+    }
+
+    textwin = SDLTest_TextWindowCreate(0, 0, 640, 480);
 
 #if __IPHONEOS__
     /* Creating the context creates the view, which we need to show keyboard */