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tools/plot.c: clear sample mode screen with C
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@ -80,6 +80,13 @@ int plot(int x, int y)
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switch (event.type) {
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case SDL_KEYDOWN:
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switch (event.key.keysym.sym) {
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case SDLK_c:
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SDL_LockSurface(surf);
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SDL_FillRect(surf, NULL,
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SDL_MapRGB(surf->format, 0, 0, 0));
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SDL_UpdateRect(surf, 0, 0, 0, 0);
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SDL_UnlockSurface(surf);
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break;
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case SDLK_q:
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return 0;
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default:
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