Mercurial > sdl-ios-xcode
annotate src/video/SDL_alphamult.h @ 4511:ae7799d16c87
Daniel Wyatt 2010-03-26 14:52:53 PDT
If a non-console Windows SDL program has a non-quoted 0th argument followed
optionally by more non-quoted arguments and then by an empty quoted argument,
it will crash (attempts to dereference a NULL pointer).
In other words, something like this:
test.exe [non-quoted args] "" [...]
The fix is a one-liner in ParseCommandLine() of
src/main/win32/SDL_win32_main.c.
You can test this with any non-console SDL program on windows like this:
1) Open a console (cmd.exe)
2) Launch the program in one of the following ways:
program ""
program arg1 ""
program arg1 "" arg3
These will not cause a crash:
"program" [...]
program "arg1" ""
When a Windows program is launched from Explorer, its 0th argument seems to
always be quoted, so it won't be a problem in that case.
I've tested this on Windows XP SP3 and Windows 7.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Mon, 12 Jul 2010 22:08:50 -0700 |
parents | f7b03b6838cb |
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3054
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Fixed alpha blending textures with the GDI renderer
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1 /* |
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2 SDL - Simple DirectMedia Layer |
3697 | 3 Copyright (C) 1997-2010 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Lesser General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
8d93bfecb9dc
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13 Lesser General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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18 |
8d93bfecb9dc
Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
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19 Sam Lantinga |
8d93bfecb9dc
Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
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20 slouken@libsdl.org |
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Sam Lantinga <slouken@libsdl.org>
parents:
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21 */ |
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Fixed alpha blending textures with the GDI renderer
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parents:
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22 |
8d93bfecb9dc
Fixed alpha blending textures with the GDI renderer
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23 /* Functions to pre-multiply the alpha channel into the color channels */ |
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24 |
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25 #define DEFINE_PREMULTIPLY_FUNC(fmt) \ |
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26 void \ |
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27 SDL_PreMultiplyAlpha##fmt(int w, int h, Uint32 *pixels, int pitch); |
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28 |
3055 | 29 /* *INDENT-OFF* */ |
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30 DEFINE_PREMULTIPLY_FUNC(ARGB8888) |
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31 DEFINE_PREMULTIPLY_FUNC(RGBA8888) |
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32 DEFINE_PREMULTIPLY_FUNC(ABGR8888) |
8d93bfecb9dc
Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
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33 DEFINE_PREMULTIPLY_FUNC(BGRA8888) |
3055 | 34 /* *INDENT-ON* */ |
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Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
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35 |
8d93bfecb9dc
Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
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36 #undef DEFINE_PREMULTIPLY_FUNC |
8d93bfecb9dc
Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
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37 |
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Fixed alpha blending textures with the GDI renderer
Sam Lantinga <slouken@libsdl.org>
parents:
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38 /* vi: set ts=4 sw=4 expandtab: */ |