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optimize blitSprite

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This commit is contained in:
Dennis Ranke
2023-04-03 00:09:02 +02:00
parent bbb75838cd
commit 4a1d607bcb
2 changed files with 25 additions and 9 deletions
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platform/bin/platform.uw8
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platform/src/platform.cwa
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@@ -353,11 +353,23 @@ export fn line(x1: f32, y1: f32, x2: f32, y2: f32, col: i32) {
} }
export fn blitSprite(sprite: i32, size: i32, x: i32, y: i32, control: i32) { export fn blitSprite(sprite: i32, size: i32, x: i32, y: i32, control: i32) {
let width = size & 65535; let lazy width = size & 65535;
let height = select(size >> 16, size >> 16, width); let lazy height = select(size >> 16, size >> 16, width);
let lazy x0 = select(x < 0, -x, 0);
let lazy x1 = select(x + width > 320, 320 - x, width);
let lazy y0 = select(y < 0, -y, 0);
let lazy y1 = select(y + height > 240, 240 - y, height);
let lazy numRows = y1 - y0;
let lazy numCols = x1 - x0;
if numRows <= 0 | numCols <= 0 {
return;
}
let trans = (control & 511) - 256; let trans = (control & 511) - 256;
let flip_x = 1 - ((control >> 8) & 2); let lazy flip_x = 1 - ((control >> 8) & 2);
let flip_y = 1 - ((control >> 9) & 2); let lazy flip_y = 1 - ((control >> 9) & 2);
if flip_x < 0 { if flip_x < 0 {
sprite += width - 1; sprite += width - 1;
} }
@@ -365,17 +377,21 @@ export fn blitSprite(sprite: i32, size: i32, x: i32, y: i32, control: i32) {
sprite += (height - 1) * width; sprite += (height - 1) * width;
} }
let ly = 0; let srcRow = sprite + x0 * flip_x + y0 * flip_y * width;
let dstRow = x + x0 + (y + y0) * 320;
loop yloop { loop yloop {
let lx = 0; let lx = 0;
loop xloop { loop xloop {
let col = (sprite + lx * flip_x + ly * flip_y * height)?0; let lazy col = (srcRow + lx * flip_x)?0;
if col != trans { if col != trans {
setPixel(x + lx, y + ly, col); (dstRow + lx)?120 = col;
} }
branch_if (lx +:= 1) < width: xloop; branch_if (lx +:= 1) < numCols: xloop;
} }
branch_if (ly +:= 1) < height: yloop; srcRow += width * flip_y;
dstRow += 320;
branch_if numRows -:= 1: yloop;
} }
} }