Description
PS8-1 Bitmap drawing and pixel-value inquiry (ps8-1.cpp) [30 points]
Complete the following program so that the program opens 300×300 window and draws a 16×16 bitmap
defined in the char pattern[]. The bitmap is 16×16 and character code of ‘1’ represents a black pixel, and
‘.‘ represents an empty pixel. A pixel of the bitmap must be magnified to 16×16 square on the window.
The program must terminate when the user presses ESC key.
When the user moves the mouse cursor over the window, print on the console window (1) mouse
cursor coordinate relative to the top left corner of the window, and (2) ‘1’ or ‘.’ depending on the pixel
under the mouse cursor. (Don’t try to read the color from OpenGL. Use the pixel value stored in char
pattern[].)
For example, when the mouse cursor is moved over to (50,50), your program must print:
50 50 1
Or, if the mouse cursor is moved over to (3,3), your program must print:
3 3 .
The program must not print anything if the mouse cursor is not over the bitmap.
The program must be saved as ps8-1.cpp and must be included in the Zip file. (Base code is available
from the Canvas.)
Test your program with the compiler server! If you see a red-line, you may be using a platform- or
compiler-specific feature, which may give you 50% point-deduction!
#include <stdio.h>
#include “fssimplewindow.h”
int main(void)
{
// Character for the cell (x,y) will be pattern[y*16+x]
char pattern[]=
{
// By the way, if you want to define a long string, you can write like this.
“…1……..1…”
“…11……11…”
“…1.1….1.1…”
“…1..1..1..1…”
“…1..1111..1…”
“..1……….1..”
“..1..11..11..1..”
“..1……….1..”
“.1..111..111..1.”
“.1.1.1.11.1.1.1.”
“1..1.1.11.1.1..1”
“1…111..111…1”
“.1…………1.”
“.1…..11…..1.”
“..111……111..”
“…..111111…..”
};
FsOpenWindow(16,16,300,300,0);
while(FSKEY_ESC!=FsInkey())
{
FsPollDevice();
int lb,mb,rb,mx,my;
if(FSMOUSEEVENT_MOVE==FsGetMouseEvent(lb,mb,rb,mx,my))
{
}
FsSleep(10);
}
return 0;
}
Running image
PS8-2 Pixel value inquiry (ps8-2.cpp) [70 points]
Write a program (called ps8-2.cpp) that:
(1) Prints “Enter File Name:” on the console window.
(2) Takes file name as input from the console window. (Use Fgets member function of the
TextString class we did in class.) (*)
(3) Reads a picture file (.PNG file).
(4) Opens the graphics window that is wider and taller by 10 pixels compared to the picture. (If the
picture is 800×600, the window size must be 810×610)
(5) Draws a picture on the top-left corner of the window.
(6) Prints on the console window the mouse cursor coordinate and the pixel value (R,G,B, each
ranges from 0 to 255) under the mouse cursor. Do not print anything if the mouse cursor is not
over the picture. (Hint: A pixel consists of four unsigned char values (R,G,B,A) if you read the file
by YsRawPngDecoder class. You don’t have to print Alpha value.)
(7) Terminates when the user presses ESC key.
Be careful about the coordinate transformation. The lower left corner is (0,0) of the picture coordinate,
while top left corner is (0,0) of the window coordinate.
The CPP file must be saved as ps8-2.cpp and included in the zip file.
5% Extra Point: When the user holds the mouse-left button down, draw 5×5 pixel blue square around
the mouse cursor on the PNG image. But, your program must not crash when the user does so near
the edge of the picture. Once the square is drawn, the pixel-value for the updated pixel should be
(R,G,B)=(0,0,255).
Test your program with the compiler server! If you see a red-line, you may be using a platform- or
compiler-specific feature, which may give you 50% point-deduction!
(*) In XCode, make sure to turn off SandBox. Also enter full-path file name