A: |
You probably didn't allocate enough space to store a bitmap.
The simplest way to do so is given in this example (called "Bitmap Test"):
// Retrieve and store a bitmap
#define USE_TI89 // Compile for TI-89
#define USE_TI92PLUS // Compile for TI-92 Plus
#define USE_V200 // Compile for V200
#define OPTIMIZE_ROM_CALLS // Use ROM Call Optimization
#define MIN_AMS 100 // Compile for AMS 1.00 or higher
#include <tigcclib.h> // Include All Header Files
// Main Function
void _main(void)
{
SCR_RECT full_screen = {{0, 0, LCD_WIDTH - 1, LCD_HEIGHT - 1}};
char buffer [BITMAP_HDR_SIZE + LCD_WIDTH*LCD_HEIGHT/8]; // or 2004 for a TI-89 and 3844 for a TI-92+/V200 if you like it more
BitmapGet (&full_screen, buffer); // store screen in buffer
clrscr ();
printf ("Press any key to\nrestore screen...");
ngetchx ();
BitmapPut (0, 0, buffer, &full_screen, A_REPLACE);
ngetchx ();
}
Note that this is just an example: for saving/restoring the whole screen,
the functions LCD_save and
LCD_restore are much more efficient!
Moreover, buffer will probably be allocated using
malloc in a more realictic example.
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