--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Xcode-iPhoneOS/Demos/src/keyboard.c	Sat Sep 19 07:32:36 2009 +0000
@@ -0,0 +1,319 @@
+/*
+ *	keyboard.c
+ *	written by Holmes Futrell
+ *	use however you want
+ */
+
+#import "SDL.h"
+#import "common.h"
+
+#define GLYPH_SIZE_IMAGE 16     /* size of glyphs (characters) in the bitmap font file */
+#define GLYPH_SIZE_SCREEN 32    /* size of glyphs (characters) as shown on the screen */
+
+static SDL_TextureID textureID; /* texture where we'll hold our font */
+
+/* iPhone SDL addition keyboard related function definitions */
+extern DECLSPEC int SDLCALL SDL_iPhoneKeyboardShow(SDL_WindowID windowID);
+extern DECLSPEC int SDLCALL SDL_iPhoneKeyboardHide(SDL_WindowID windowID);
+extern DECLSPEC SDL_bool SDLCALL SDL_iPhoneKeyboardIsShown(SDL_WindowID
+                                                           windowID);
+extern DECLSPEC int SDLCALL SDL_iPhoneKeyboardToggle(SDL_WindowID windowID);
+
+/* function declarations */
+void cleanup(void);
+void drawBlank(int x, int y);
+
+static int numChars = 0;        /* number of characters we've typed so far */
+static SDL_bool lastCharWasColon = 0;   /* we use this to detect sequences such as :) */
+static SDL_Color bg_color = { 50, 50, 100, 255 };       /* color of background */
+
+/* this structure maps a scancode to an index in our bitmap font.
+   it also contains data about under which modifiers the mapping is valid
+   (for example, we don't want shift + 1 to produce the character '1',
+   but rather the character '!')
+*/
+typedef struct
+{
+    SDL_scancode scancode;      /* scancode of the key we want to map */
+    int allow_no_mod;           /* is the map valid if the key has no modifiers? */
+    SDLMod mod;                 /* what modifiers are allowed for the mapping */
+    int index;                  /* what index in the font does the scancode map to */
+} fontMapping;
+
+#define TABLE_SIZE 51           /* size of our table which maps keys and modifiers to font indices */
+
+/* Below is the table that defines the mapping between scancodes and modifiers to indices in the
+   bitmap font.  As an example, then line '{ SDL_SCANCODE_A, 1, KMOD_SHIFT, 33 }' means, map
+   the key A (which has scancode SDL_SCANCODE_A) to index 33 in the font (which is a picture of an A),
+   The '1' means that the mapping is valid even if there are no modifiers, and KMOD_SHIFT means the
+   mapping is also valid if the user is holding shift.
+*/
+fontMapping map[TABLE_SIZE] = {
+
+    {SDL_SCANCODE_A, 1, KMOD_SHIFT, 33},        /* A */
+    {SDL_SCANCODE_B, 1, KMOD_SHIFT, 34},        /* B */
+    {SDL_SCANCODE_C, 1, KMOD_SHIFT, 35},        /* C */
+    {SDL_SCANCODE_D, 1, KMOD_SHIFT, 36},        /* D */
+    {SDL_SCANCODE_E, 1, KMOD_SHIFT, 37},        /* E */
+    {SDL_SCANCODE_F, 1, KMOD_SHIFT, 38},        /* F */
+    {SDL_SCANCODE_G, 1, KMOD_SHIFT, 39},        /* G */
+    {SDL_SCANCODE_H, 1, KMOD_SHIFT, 40},        /* H */
+    {SDL_SCANCODE_I, 1, KMOD_SHIFT, 41},        /* I */
+    {SDL_SCANCODE_J, 1, KMOD_SHIFT, 42},        /* J */
+    {SDL_SCANCODE_K, 1, KMOD_SHIFT, 43},        /* K */
+    {SDL_SCANCODE_L, 1, KMOD_SHIFT, 44},        /* L */
+    {SDL_SCANCODE_M, 1, KMOD_SHIFT, 45},        /* M */
+    {SDL_SCANCODE_N, 1, KMOD_SHIFT, 46},        /* N */
+    {SDL_SCANCODE_O, 1, KMOD_SHIFT, 47},        /* O */
+    {SDL_SCANCODE_P, 1, KMOD_SHIFT, 48},        /* P */
+    {SDL_SCANCODE_Q, 1, KMOD_SHIFT, 49},        /* Q */
+    {SDL_SCANCODE_R, 1, KMOD_SHIFT, 50},        /* R */
+    {SDL_SCANCODE_S, 1, KMOD_SHIFT, 51},        /* S */
+    {SDL_SCANCODE_T, 1, KMOD_SHIFT, 52},        /* T */
+    {SDL_SCANCODE_U, 1, KMOD_SHIFT, 53},        /* U */
+    {SDL_SCANCODE_V, 1, KMOD_SHIFT, 54},        /* V */
+    {SDL_SCANCODE_W, 1, KMOD_SHIFT, 55},        /* W */
+    {SDL_SCANCODE_X, 1, KMOD_SHIFT, 56},        /* X */
+    {SDL_SCANCODE_Y, 1, KMOD_SHIFT, 57},        /* Y */
+    {SDL_SCANCODE_Z, 1, KMOD_SHIFT, 58},        /* Z */
+    {SDL_SCANCODE_0, 1, 0, 16}, /* 0 */
+    {SDL_SCANCODE_1, 1, 0, 17}, /* 1 */
+    {SDL_SCANCODE_2, 1, 0, 18}, /* 2 */
+    {SDL_SCANCODE_3, 1, 0, 19}, /* 3 */
+    {SDL_SCANCODE_4, 1, 0, 20}, /* 4 */
+    {SDL_SCANCODE_5, 1, 0, 21}, /* 5 */
+    {SDL_SCANCODE_6, 1, 0, 22}, /* 6 */
+    {SDL_SCANCODE_7, 1, 0, 23}, /* 7 */
+    {SDL_SCANCODE_8, 1, 0, 24}, /* 8 */
+    {SDL_SCANCODE_9, 1, 0, 25}, /* 9 */
+    {SDL_SCANCODE_SPACE, 1, 0, 0},      /*' ' */
+    {SDL_SCANCODE_1, 0, KMOD_SHIFT, 1}, /* ! */
+    {SDL_SCANCODE_SLASH, 0, KMOD_SHIFT, 31},    /* ? */
+    {SDL_SCANCODE_SLASH, 1, 0, 15},     /* / */
+    {SDL_SCANCODE_COMMA, 1, 0, 12},     /* , */
+    {SDL_SCANCODE_SEMICOLON, 1, 0, 27}, /* ; */
+    {SDL_SCANCODE_SEMICOLON, 0, KMOD_SHIFT, 26},        /* : */
+    {SDL_SCANCODE_PERIOD, 1, 0, 14},    /* . */
+    {SDL_SCANCODE_MINUS, 1, 0, 13},     /* - */
+    {SDL_SCANCODE_EQUALS, 0, KMOD_SHIFT, 11},   /* = */
+    {SDL_SCANCODE_APOSTROPHE, 1, 0, 7}, /* ' */
+    {SDL_SCANCODE_APOSTROPHE, 0, KMOD_SHIFT, 2},        /* " */
+    {SDL_SCANCODE_5, 0, KMOD_SHIFT, 5}, /* % */
+
+};
+
+/*
+	This function maps an SDL_keysym to an index in the bitmap font.
+	It does so by scanning through the font mapping table one entry
+	at a time.
+ 
+	If a match is found (scancode and allowed modifiers), the proper
+	index is returned.
+ 
+	If there is no entry for the key, -1 is returned
+*/
+int
+keyToIndex(SDL_keysym key)
+{
+    int i, index = -1;
+    for (i = 0; i < TABLE_SIZE; i++) {
+        fontMapping compare = map[i];
+        if (key.scancode == compare.scancode) {
+            /* if this entry is valid with no key mod and we have no keymod, or if
+               the key's modifiers are allowed modifiers for that mapping */
+            if ((compare.allow_no_mod && key.mod == 0)
+                || (key.mod & compare.mod)) {
+                index = compare.index;
+                break;
+            }
+        }
+    }
+    return index;
+}
+
+/* 
+	This function returns and x,y position for a given character number.
+    It is used for positioning each character of text
+*/
+void
+getPositionForCharNumber(int n, int *x, int *y)
+{
+    int x_padding = 16;         /* padding space on left and right side of screen */
+    int y_padding = 32;         /* padding space at top of screen */
+    /* figure out the number of characters that can fit horizontally across the screen */
+    int max_x_chars = (SCREEN_WIDTH - 2 * x_padding) / GLYPH_SIZE_SCREEN;
+    int line_separation = 5;    /* pixels between each line */
+    *x = (n % max_x_chars) * GLYPH_SIZE_SCREEN + x_padding;
+    *y = (n / max_x_chars) * (GLYPH_SIZE_SCREEN + line_separation) +
+        y_padding;
+}
+
+void
+drawIndex(int index)
+{
+    int x, y;
+    getPositionForCharNumber(numChars, &x, &y);
+    SDL_Rect srcRect =
+        { GLYPH_SIZE_IMAGE * index, 0, GLYPH_SIZE_IMAGE, GLYPH_SIZE_IMAGE };
+    SDL_Rect dstRect = { x, y, GLYPH_SIZE_SCREEN, GLYPH_SIZE_SCREEN };
+    drawBlank(x, y);
+    SDL_RenderCopy(textureID, &srcRect, &dstRect);
+}
+
+/*  draws the cursor icon at the current end position of the text */
+void
+drawCursor(void)
+{
+    drawIndex(29);              /* cursor is at index 29 in the bitmap font */
+}
+
+/* paints over a glyph sized region with the background color
+   in effect it erases the area
+*/
+void
+drawBlank(int x, int y)
+{
+    SDL_Rect rect = { x, y, GLYPH_SIZE_SCREEN, GLYPH_SIZE_SCREEN };
+    SDL_SetRenderDrawColor(bg_color.r, bg_color.g, bg_color.b,
+                           bg_color.unused);
+    SDL_RenderFill(&rect);
+}
+
+/* moves backwards one character, erasing the last one put down */
+void
+backspace(void)
+{
+    int x, y;
+    if (numChars > 0) {
+        getPositionForCharNumber(numChars, &x, &y);
+        drawBlank(x, y);
+        numChars--;
+        getPositionForCharNumber(numChars, &x, &y);
+        drawBlank(x, y);
+        drawCursor();
+    }
+}
+
+/* this function loads our font into an SDL_Texture and returns the SDL_TextureID */
+SDL_TextureID
+loadFont(void)
+{
+
+    SDL_Surface *surface = SDL_LoadBMP("kromasky_16x16.bmp");
+
+    if (!surface) {
+        printf("Error loading bitmap: %s\n", SDL_GetError());
+        return 0;
+    } else {
+        /* set the transparent color for the bitmap font (hot pink) */
+        SDL_SetColorKey(surface, 1, SDL_MapRGB(surface->format, 238, 0, 252));
+        /* now we convert the surface to our desired pixel format */
+        int format = SDL_PIXELFORMAT_ABGR8888;  /* desired texture format */
+        Uint32 Rmask, Gmask, Bmask, Amask;      /* masks for desired format */
+        int bpp;                /* bits per pixel for desired format */
+        SDL_PixelFormatEnumToMasks(format, &bpp, &Rmask, &Gmask, &Bmask,
+                                   &Amask);
+        SDL_Surface *converted =
+            SDL_CreateRGBSurface(0, surface->w, surface->h, bpp, Rmask, Gmask,
+                                 Bmask, Amask);
+        SDL_BlitSurface(surface, NULL, converted, NULL);
+        /* create our texture */
+        textureID =
+            SDL_CreateTextureFromSurface(SDL_PIXELFORMAT_ABGR8888, converted);
+        if (textureID == 0) {
+            printf("texture creation failed: %s\n", SDL_GetError());
+        } else {
+            /* set blend mode for our texture */
+            SDL_SetTextureBlendMode(textureID, SDL_BLENDMODE_BLEND);
+        }
+        SDL_FreeSurface(surface);
+        SDL_FreeSurface(converted);
+        return textureID;
+    }
+}
+
+int
+main(int argc, char *argv[])
+{
+
+    int index;                  /* index of last key we pushed in the bitmap font */
+    SDL_Event event;            /* last event received */
+    SDLMod mod;                 /* key modifiers of last key we pushed */
+    SDL_scancode scancode;      /* scancode of last key we pushed */
+
+    if (SDL_Init(SDL_INIT_VIDEO) < 0) {
+        printf("Error initializing SDL: %s", SDL_GetError());
+    }
+    /* create window */
+    SDL_WindowID windowID =
+        SDL_CreateWindow("iPhone keyboard test", 0, 0, SCREEN_WIDTH,
+                         SCREEN_HEIGHT, 0);
+    /* create renderer */
+    SDL_CreateRenderer(windowID, 0, 0);
+
+    /* load up our font */
+    loadFont();
+
+    /* draw the background, we'll just paint over it */
+    SDL_SetRenderDrawColor(bg_color.r, bg_color.g, bg_color.b,
+                           bg_color.unused);
+    SDL_RenderFill(NULL);
+    SDL_RenderPresent();
+
+    int done = 0;
+    /* loop till we get SDL_Quit */
+    while (SDL_WaitEvent(&event)) {
+        switch (event.type) {
+        case SDL_QUIT:
+            done = 1;
+            break;
+        case SDL_KEYDOWN:
+            index = keyToIndex(event.key.keysym);
+            scancode = event.key.keysym.scancode;
+            mod = event.key.keysym.mod;
+            if (scancode == SDL_SCANCODE_DELETE) {
+                /* if user hit delete, delete the last character */
+                backspace();
+                lastCharWasColon = 0;
+            } else if (lastCharWasColon && scancode == SDL_SCANCODE_0
+                       && (mod & KMOD_SHIFT)) {
+                /* if our last key was a colon and this one is a close paren, the make a hoppy face */
+                backspace();
+                drawIndex(32);  /* index for happy face */
+                numChars++;
+                drawCursor();
+                lastCharWasColon = 0;
+            } else if (index != -1) {
+                /* if we aren't doing a happy face, then just draw the normal character */
+                drawIndex(index);
+                numChars++;
+                drawCursor();
+                lastCharWasColon =
+                    (event.key.keysym.scancode == SDL_SCANCODE_SEMICOLON
+                     && (event.key.keysym.mod & KMOD_SHIFT));
+            }
+            /* check if the key was a colon */
+            /* draw our updates to the screen */
+            SDL_RenderPresent();
+            break;
+#ifdef __IPHONEOS__
+        case SDL_MOUSEBUTTONUP:
+            /*      mouse up toggles onscreen keyboard visibility
+               this function is available ONLY on iPhone OS
+             */
+            SDL_iPhoneKeyboardToggle(windowID);
+            break;
+#endif
+        }
+    }
+    cleanup();
+    return 0;
+}
+
+/* clean up after ourselves like a good kiddy */
+void
+cleanup(void)
+{
+    SDL_DestroyTexture(textureID);
+    SDL_Quit();
+}