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1 parent e7fe63f commit 3656b55Copy full SHA for 3656b55
uefi-test-runner/examples/sierpinski.rs
@@ -55,6 +55,23 @@ impl Buffer {
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dims: (self.width, self.height),
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})
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}
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+
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+ /// Update only a pixel to the framebuffer.
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+ fn blit_pixel(
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+ &self,
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+ gop: &mut GraphicsOutput,
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+ coords: (usize, usize),
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+ ) -> Result {
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+ gop.blt(BltOp::BufferToVideo {
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+ buffer: &self.pixels,
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+ src: BltRegion::SubRectangle {
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+ coords,
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+ px_stride: self.width,
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+ },
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+ dest: coords,
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+ dims: (1, 1),
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+ })
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+ }
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// ANCHOR_END: buffer
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@@ -90,6 +107,9 @@ fn draw_sierpinski(bt: &BootServices) -> Result {
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+ // Draw background.
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+ buffer.blit(&mut gop)?;
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let size = Point::new(width as f32, height as f32);
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// Define the vertices of a big triangle.
@@ -119,7 +139,7 @@ fn draw_sierpinski(bt: &BootServices) -> Result {
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pixel.blue = 0;
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// Draw the buffer to the screen.
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- buffer.blit(&mut gop)?;
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+ buffer.blit_pixel(&mut gop,(p.xasusize, p.yasusize))?;
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