Crate blitter[−][src]
Expand description
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<u32> = 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 blitter_test(mut fb: &mut Framebuffer, bitmaps: &mut Vec<Bitmap>) { fb.clear_area(640, 10, 0, 0, 0).unwrap(); bitmaps[0].blit(&mut fb); //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
Structs
This structure stores bitmap’s sizes, coordinates, and a pointer to its pixel data
The framebuffer struct contains the buffer’s width, height, and a pointer to its pixel data