annotate src/hermes/README @ 1240:3b8a43c428bb
From Bug #36:
There are a couple of issues with the selection of Altivec alpha-blitting
routines in CalculateAlphaBlit() in src/video/SDL_Blit_A.c.
1) There's no check for the presence of Altivec when checking if the
Blit32to565PixelAlphaAltivec() routine can be selected.
2) Altivec cannot be used in video memory, and there's no check if the
destination surface is a hardware surface. (Alpha-blitting to a hardware
surface with GPU support is a bad idea, but somebody's bound to do it anyway.)
Patch to fix these attached.
| author |
Ryan C. Gordon <icculus@icculus.org> |
| date |
Sun, 08 Jan 2006 21:18:15 +0000 |
| parents |
74212992fb08 |
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1 HERMES 1.2.4 (c)1998 Christian Nentwich (brn) (c.nentwich@cs.ucl.ac.uk)
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2 and quite a few assembler routines (c) Glenn Fielder (gaffer@gaffer.org)
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3
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4 This library and all the files enclosed in this package are free software
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5 under the terms of the GNU Library General Public License (LGPL). Please
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6 refer to the included file COPYING.LIB for the exact terms.
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7 ----------------------------------------------------------------------------
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8
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9 This is a stripped down version of HERMES, including only the x86 assembler
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10 converters, for use with Simple DirectMedia Layer.
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11
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12 The full HERMES library is available at: http://hermes.terminal.at/
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