blitter

This library performs various blitting and drawing operations on a raw 32 bits framebuffer, whatever the encoding. - Bitmap blitting / cropping - Blit a part of bitmap (ie. bitmap fonts) - Blit with a color or bits mask - Pixel plotting - Optional PNG decoding feature

Example: ``` // Framebuffer initialization let mut pixels: Vec = vec!(0; WIDTH * HEIGHT); let mut fb = Framebuffer {width: WIDTH, height: HEIGHT, pixels: &mut pixels};

// For example, you can push all the bitmaps in a single vec to give ownership of all bitmaps let mut bitmaps = Vec::new(); bitmaps.push(Bitmap {w: 10, h: 10, x: 0, y: 0, pixels: &image::PIXELS});

while display loop with some display library { blitter_test(&mut fb, &mut bitmaps); your display lib display update function with buffer &fb.pixels }

// For testing : moves a 10x10 square and prints a 4x4 pixel at the center of the screen fn blittertest(mut fb: &mut Framebuffer, bitmaps: &mut Vec) { fb.cleararea(640, 10, 0, 0, 0).unwrap(); bitmaps[0].blit(&mut fb).unwrap(); //copies a bitmap to the framebuffer if bitmaps[0].x < WIDTH - 10 { bitmaps[0].x = bitmaps[0].x+3; } else { fb.clear(0); } fb.draw_fatpixel(320,240,4,0xffffffff).unwrap(); } ```

You can also view and run some (very basic) examples using the minifb library in the 'examples' directory: cargo run --example demo --features="png-decode" cargo run --example minifb --features="png-decode" cargo run --example square

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License: GPL-3.0