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[common] framebuffer: fix copy when source and dest pitch differs
We used to increment the source buffer index by width * bpp, not by pitch.
This is incorrect and the root cause behind #670.
This is a regression that appeared in 196050bd23
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@ -99,7 +99,7 @@ bool framebuffer_read(const FrameBuffer * frame, void * restrict dst,
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return false;
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memcpy(d, frame->data + rp, dstpitch);
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rp += linewidth;
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rp += pitch;
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d += dstpitch;
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}
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}
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