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59 lines
2.0 KiB
C++
59 lines
2.0 KiB
C++
//
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// Generic stuff.
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//
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// Copyright (c) 2016 Intel Corporation
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// Copyright (c) 2020 Sebastian Kaufel
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this
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// software and associated documentation files (the "Software"), to deal in the Software
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// without restriction, including without limitation the rights to use, copy, modify,
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// merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to the following
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// conditions:
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//
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// The above copyright notice and this permission notice shall be included in all copies
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// or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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// CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
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// OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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#include "BC.h"
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#include "memory.h" // memcpy
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void ReplicateBorders(rgba_surface* dst_slice, const rgba_surface* src_tex, int start_x, int start_y, int bpp)
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{
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int bytes_per_pixel = bpp >> 3;
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bool aliasing = false;
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if (&src_tex->ptr[src_tex->stride * start_y + bytes_per_pixel * start_x] == dst_slice->ptr)
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aliasing = true;
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for (int y = 0; y < dst_slice->height; y++)
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{
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for (int x = 0; x < dst_slice->width; x++)
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{
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int xx = start_x + x;
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int yy = start_y + y;
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if (aliasing && xx < src_tex->width && yy < src_tex->height) continue;
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if (xx >= src_tex->width) xx = src_tex->width - 1;
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if (yy >= src_tex->height) yy = src_tex->height - 1;
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void* dst = &dst_slice->ptr[dst_slice->stride * y + bytes_per_pixel * x];
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void* src = &src_tex->ptr[src_tex->stride * yy + bytes_per_pixel * xx];
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memcpy(dst, src, bytes_per_pixel);
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}
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}
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}
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//
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// The End.
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//
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