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51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
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/* powerpc_vmx_init.c - PowerPC optimised filter functions
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* for original AltiVec/VMX
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*
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* This is a simple stub dispatch for TenFourFox; it isn't
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* intended to be upstreamed.
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* Copyright 2017-8 Cameron Kaiser and Contributors to TenFourFox.
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* All rights reserved. */
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#ifdef PNG_READ_SUPPORTED
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#if PNG_POWERPC_VMX_OPT > 0
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void
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png_init_filter_functions_vmx(png_structp pp, unsigned int bpp)
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{
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/* If VMX is turned on, then we enable at compile time.
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moz.build sets PNG_POWERPC_VMX_IMPLEMENTATION and
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PNG_POWERPC_VMX_OPT based on TENFOURFOX_VMX. */
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/* IMPORTANT: any new internal functions used here must be declared using
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* PNG_INTERNAL_FUNCTION in ../pngpriv.h. This is required so that the
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* 'prefix' option to configure works:
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*
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* ./configure --with-libpng-prefix=foobar_
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*
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* Verify you have got this right by running the above command, doing a build
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* and examining pngprefix.h; it must contain a #define for every external
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* function you add. (Notice that this happens automatically for the
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* initialization function.)
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*/
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pp->read_filter[PNG_FILTER_VALUE_UP-1] = png_read_filter_row_up_vmx;
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if (bpp == 3)
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{
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pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub3_vmx;
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pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg3_vmx;
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pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = png_read_filter_row_paeth3_vmx;
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}
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else if (bpp == 4)
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{
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pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub4_vmx;
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pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg4_vmx;
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pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = png_read_filter_row_paeth4_vmx;
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}
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}
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#endif
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#endif
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