CS 345: Spring 2025

    class GPaint ...

    enum class GBlendMode ...

    class GCanvas {
    public:
        ...

        virtual void drawRect(const GRect&, const GPaint&) = 0;

        /**
         *  Fill the convex polygon with the color, following the same "containment" rule as
         *  rectangles.
         */
        virtual void drawConvexPolygon(const GPoint[], int count, const GPaint&) = 0;
    };

    

• Use GPaint instead of GColor for the drawing methods
• Support all of the GBlendModes defined in GPaint.h
• Rename fillRect --> drawRect
• Override drawConvexPolygon
• Update your GDrawSomething(...) to take advantage of polygons


The pa2 directory should like something like this:
• apps contains the code for testing your code.
• expected contains sample output from the image tool to compare with your output.
• include contains class headers that your code can use.
• src contains common implementations needed for the tools.
• DO NOT EDIT/ADD/REMOVE anything in these sub-directories. You should only add files to the root of the directory.
• your_files any .cpp or .h files you need for your implementation. All of your work must be here.

To test your code...

    > make
    > ./image -e expected
    > ./tests
    > ./bench
    > ./dbench   (just run this to be sure it doesn't crash)
    

For more details when testing...

    > mkdir diff
    > ./image -e expected -d diff
    > open diff/index.html
    >
    > ./tests -v
    >
    > ./bench -m substring-to-match
    

     

Bench scores on the VM

        clear          2.41
        rects_blend    6.57
        rects_opaque   0.88
        rect_big       0.45
        rect_tiny      0.44
        quads_blend    6.92
        quads_opaque   1.08
        circles_large  3.4
        circles_tiny   0.46
        modes_0        1.45
        modes_x       25.05
        modes_1       13.57