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Refactor pixel-calculation - xscreenshot - screen capture tool |
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git clone git://git.codemadness.org/xscreenshot |
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Log |
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Files |
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README |
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LICENSE |
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--- |
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commit 1f1d1ce39921ed510d6927243da836a906f0f26d |
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parent d027bcf68df72a92e3b0f6d2b7b97e73e736f4ed |
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Author: Laslo Hunhold <[email protected]> |
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Date: Mon, 28 Jul 2014 18:35:39 +0000 |
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Refactor pixel-calculation |
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patch slightly adjusted to avoid type warnings. |
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Diffstat: |
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M xscreenshot.c | 18 +++++++----------- |
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1 file changed, 7 insertions(+), 11 deletions(-) |
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--- |
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diff --git a/xscreenshot.c b/xscreenshot.c |
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@@ -31,9 +31,7 @@ main(int argc, char *argv[]) |
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Display *dpy; |
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Window win; |
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XWindowAttributes attr; |
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- uint32_t tmp, pix; |
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- uint8_t rgba[4] = {0, 0, 0, 255}; |
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- int w, h; |
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+ uint32_t tmp, w, h; |
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dpy = XOpenDisplay(NULL); |
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if(!dpy) |
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@@ -68,17 +66,15 @@ main(int argc, char *argv[]) |
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fwrite(&tmp, sizeof(uint32_t), 1, stdout); |
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/* write pixels */ |
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- for(h = 0; h < img->height; ++h) { |
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- for(w = 0; w < img->width; ++w) { |
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- pix = XGetPixel(img, w, h); |
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- rgba[0] = (pix & img->red_mask) >> 16; |
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- rgba[1] = (pix & img->green_mask) >> 8; |
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- rgba[2] = (pix & img->blue_mask) >> 0; |
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- if(fwrite(&rgba, sizeof(uint8_t), 4, stdout) != 4) |
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+ for(h = 0; h < (uint32_t)img->height; h++) { |
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+ for(w = 0; w < (uint32_t)img->width; w++) { |
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+ tmp = XGetPixel(img, w, h); |
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+ tmp = ((tmp & img->red_mask) >> 16) | (tmp & img->gre… |
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+ | ((tmp & img->blue_mask) << 16) | (255 << 24); |
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+ if(fwrite(&tmp, sizeof(uint32_t), 1, stdout) != 1) |
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die("fwrite() failed"); |
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} |
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} |
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- |
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XDestroyImage(img); |
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return EXIT_SUCCESS; |
