* read_bmp_*(): add FORMAT_RETURN_SIZE

* Lua: add luaL_checkboolean() & luaL_optboolean()
* Lua: add read_bmp_file


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21074 a1c6a512-1295-4272-9138-f99709370657

apps/plugins/lua/lauxlib.c

@@ -200,6 +200,19 @@ LUALIB_API lua_Integer luaL_optinteger (lua_State *L, int narg,
 }
 
 
+LUALIB_API int luaL_checkboolean (lua_State *L, int narg) {
+  int b = lua_toboolean(L, narg);
+  if( b == 0 && !lua_isboolean(L, narg))
+    tag_error(L, narg, LUA_TBOOLEAN);
+  return b;
+}
+
+
+LUALIB_API int luaL_optboolean (lua_State *L, int narg, int def) {
+  return luaL_opt(L, luaL_checkboolean, narg, def);
+}
+
+
 LUALIB_API int luaL_getmetafield (lua_State *L, int obj, const char *event) {
   if (!lua_getmetatable(L, obj))  /* no metatable? */
     return 0;

apps/plugins/lua/lauxlib.h

@@ -58,6 +58,10 @@ LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int numArg);
 LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int nArg,
                                           lua_Integer def);
 
+LUALIB_API int (luaL_checkboolean) (lua_State *L, int numArg);
+LUALIB_API int (luaL_optboolean) (lua_State *L, int nArg,
+                                  int def);
+
 LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg);
 LUALIB_API void (luaL_checktype) (lua_State *L, int narg, int t);
 LUALIB_API void (luaL_checkany) (lua_State *L, int narg);

apps/plugins/lua/rocklib.c

@@ -69,11 +69,9 @@ static void rli_wrap(lua_State *L, fb_data *src, int width, int height)
     a->data = src;
 }
 
-static int rli_new(lua_State *L)
+static fb_data* rli_alloc(lua_State *L, int width, int height)
 {
-    int width = luaL_checkint(L, 1);
-    int height = luaL_checkint(L, 2);
-    size_t nbytes = sizeof(struct rocklua_image) + (width - 1)*(height - 1)*sizeof(fb_data);
+    size_t nbytes = sizeof(struct rocklua_image) + ((width*height) - 1) * sizeof(fb_data);
     struct rocklua_image *a = (struct rocklua_image *)lua_newuserdata(L, nbytes);
 
     luaL_getmetatable(L, ROCKLUA_IMAGE);
@@ -82,6 +80,17 @@ static int rli_new(lua_State *L)
     a->width = width;
     a->height = height;
     a->data = &a->dummy[0][0];
+
+    return a->data;
+}
+
+static int rli_new(lua_State *L)
+{
+    int width = luaL_checkint(L, 1);
+    int height = luaL_checkint(L, 2);
+
+    rli_alloc(L, width, height);
+
     return 1;
 }
 
@@ -450,7 +459,7 @@ RB_WRAP(current_tick)
 
 RB_WRAP(button_get)
 {
-    bool block = lua_toboolean(L, 1);
+    bool block = luaL_checkboolean(L, 1);
     long result = rb->button_get(block);
     lua_pushinteger(L, result);
     return 1;
@@ -714,6 +723,33 @@ RB_WRAP(lcd_rgbunpack)
 }
 #endif
 
+RB_WRAP(read_bmp_file)
+{
+    struct bitmap bm;
+    const char* filename = luaL_checkstring(L, 1);
+    bool dither = luaL_optboolean(L, 2, true);
+    bool transparent = luaL_optboolean(L, 3, false);
+    int format = FORMAT_NATIVE;
+
+    if(dither)
+        format |= FORMAT_DITHER;
+
+    if(transparent)
+        format |= FORMAT_TRANSPARENT;
+
+    int result = rb->read_bmp_file(filename, &bm, 0, format | FORMAT_RETURN_SIZE, NULL);
+
+    if(result > 0)
+    {
+        bm.data = (unsigned char*) rli_alloc(L, bm.width, bm.height);
+        rb->read_bmp_file(filename, &bm, result, format, NULL);
+
+        return 1;
+    }
+
+    return 0;
+}
+
 #define R(NAME) {#NAME, rock_##NAME}
 static const luaL_Reg rocklib[] =
 {
@@ -800,6 +836,7 @@ static const luaL_Reg rocklib[] =
 #endif
 
     R(font_getstringsize),
+    R(read_bmp_file),
 
     {"new_image", rli_new},
 

apps/recorder/bmp.c

@@ -460,6 +460,7 @@ int read_bmp_fd(int fd,
     int read_width;
     int depth, numcolors, compression, totalsize;
     int ret;
+    bool return_size = format & FORMAT_RETURN_SIZE;
 
     unsigned char *bitmap = bm->data;
     struct uint8_rgb palette[256];
@@ -595,6 +596,9 @@ int read_bmp_fd(int fd,
     else
         totalsize = BM_SIZE(bm->width,bm->height,format,remote);
 
+    if(return_size)
+        return totalsize;
+
     /* Check if this fits the buffer */
     if (totalsize > maxsize) {
         DEBUGF("read_bmp_fd: Bitmap too large for buffer: "

firmware/export/lcd.h

@@ -388,6 +388,7 @@ enum
 #define FORMAT_REMOTE      0x10000000
 #define FORMAT_RESIZE      0x08000000
 #define FORMAT_KEEP_ASPECT 0x04000000
+#define FORMAT_RETURN_SIZE 0x02000000
 
 #define TRANSPARENT_COLOR LCD_RGBPACK(255,0,255)
 #define REPLACEWITHFG_COLOR LCD_RGBPACK(0,255,255)