arek
81a1b26842
Rendering used to clear the whole canvas and redraw every cell on every frame callback (~60 fps) even though the simulation ticks at 20 tps and starts paused, keeping CPU usage at ~85% while idle. Split simulation timing out of redraw() into the event loop and render only when displayed content can have changed (tick, painting, pattern placement, preview movement, grid-line toggle, resize); idle frames commit only a new frame callback. Repaint incrementally by diffing the grid against a rendered-state snapshot per row and redrawing just the changed cells, with damage limited to the repainted bounding box. Idle CPU drops to ~1% of one core; running frames render at tick rate (~20 fps) at microsecond cost. Adds grid_copy() snapshot helper with tests and archives the optimize-render-on-demand change with the new on-demand-rendering spec.
51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
#include <assert.h>
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#include <stdio.h>
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#include "grid.h"
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int main(void) {
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grid_t g;
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grid_init(&g, 4, 4);
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assert(grid_get(&g, 0, 0) == 0);
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grid_set(&g, 1, 2, 1);
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assert(grid_get(&g, 1, 2) == 1);
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assert(grid_get(&g, -1, 0) == 0);
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assert(grid_get(&g, 4, 4) == 0);
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grid_set(&g, 0, 0, 1);
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grid_resize(&g, 6, 2);
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assert(grid_get(&g, 0, 0) == 1);
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assert(grid_get(&g, 1, 2) == 0);
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grid_clear(&g);
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assert(grid_get(&g, 0, 0) == 0);
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/* grid_copy: same-size round trip */
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grid_t snap;
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grid_init(&snap, 1, 1);
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grid_set(&g, 2, 1, 1);
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grid_copy(&snap, &g);
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assert(snap.cols == 4 && snap.rows == 4);
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assert(grid_get(&snap, 2, 1) == 1);
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assert(grid_get(&snap, 0, 0) == 0);
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/* grid_copy: grow preserves cells, new area is dead */
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grid_set(&g, 3, 3, 1);
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grid_resize(&g, 6, 6);
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grid_copy(&snap, &g);
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assert(snap.cols == 6 && snap.rows == 6);
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assert(grid_get(&snap, 2, 1) == 1);
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assert(grid_get(&snap, 3, 3) == 1);
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assert(grid_get(&snap, 5, 5) == 0);
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/* grid_copy: shrink truncates out-of-bounds cells */
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grid_resize(&g, 2, 2);
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grid_copy(&snap, &g);
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assert(snap.cols == 2 && snap.rows == 2);
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assert(grid_get(&snap, 2, 1) == 0);
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assert(grid_get(&snap, 1, 1) == 0);
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grid_free(&snap);
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grid_free(&g);
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printf("grid tests passed\n");
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return 0;
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} |