Mercurial > sdl-ios-xcode
annotate src/video/dga/SDL_dgavideo.h @ 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 | b8d311d90021 |
| children | c9b51268668f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2004 (Happy New Year!)
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3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 9 | |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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Updated the source with the correct e-mail address
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 #ifndef _SDL_dgavideo_h | |
| 29 #define _SDL_dgavideo_h | |
| 30 | |
| 31 #include <X11/Xlib.h> | |
| 32 | |
| 33 #include "SDL_mouse.h" | |
| 34 #include "SDL_mutex.h" | |
| 35 #include "SDL_sysvideo.h" | |
| 36 | |
| 37 /* Hidden "this" pointer for the video functions */ | |
| 38 #define _THIS SDL_VideoDevice *this | |
| 39 | |
|
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40 /* Define this if you need the DGA driver to be thread-safe */ |
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41 #define LOCK_DGA_DISPLAY |
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42 #ifdef LOCK_DGA_DISPLAY |
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43 #define LOCK_DISPLAY() SDL_mutexP(event_lock) |
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44 #define UNLOCK_DISPLAY() SDL_mutexV(event_lock) |
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45 #else |
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46 #define LOCK_DISPLAY() |
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47 #define UNLOCK_DISPLAY() |
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48 #endif |
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49 |
| 0 | 50 |
| 51 /* This is the structure we use to keep track of video memory */ | |
| 52 typedef struct vidmem_bucket { | |
| 53 struct vidmem_bucket *prev; | |
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54 int used; |
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55 int dirty; |
| 0 | 56 Uint8 *base; |
| 57 unsigned int size; | |
| 58 struct vidmem_bucket *next; | |
| 59 } vidmem_bucket; | |
| 60 | |
| 61 /* Private display data */ | |
| 62 struct SDL_PrivateVideoData { | |
| 63 Display *DGA_Display; | |
| 64 Colormap DGA_colormap; | |
| 65 int visualClass; | |
| 66 | |
| 67 #define NUM_MODELISTS 4 /* 8, 16, 24, and 32 bits-per-pixel */ | |
| 68 int SDL_nummodes[NUM_MODELISTS]; | |
| 69 SDL_Rect **SDL_modelist[NUM_MODELISTS]; | |
| 70 | |
| 71 /* Information for the video surface */ | |
| 72 Uint8 *memory_base; | |
| 73 int memory_pitch; | |
| 74 SDL_mutex *hw_lock; | |
| 75 int sync_needed; | |
| 76 int was_flipped; | |
| 77 | |
| 78 /* Information for hardware surfaces */ | |
| 79 vidmem_bucket surfaces; | |
| 80 int surfaces_memtotal; | |
| 81 int surfaces_memleft; | |
| 82 | |
| 83 /* Information for double-buffering */ | |
| 84 int flip_page; | |
| 85 int flip_yoffset[2]; | |
| 86 Uint8 *flip_address[2]; | |
| 87 | |
| 88 /* Used to handle DGA events */ | |
| 89 int event_base; | |
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90 #ifdef LOCK_DGA_DISPLAY |
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91 SDL_mutex *event_lock; |
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92 #endif |
| 0 | 93 }; |
| 94 /* Old variable names */ | |
| 95 #define DGA_Display (this->hidden->DGA_Display) | |
| 96 #define DGA_Screen DefaultScreen(DGA_Display) | |
| 97 #define DGA_colormap (this->hidden->DGA_colormap) | |
| 98 #define DGA_visualClass (this->hidden->visualClass) | |
| 99 #define memory_base (this->hidden->memory_base) | |
| 100 #define memory_pitch (this->hidden->memory_pitch) | |
| 101 #define flip_page (this->hidden->flip_page) | |
| 102 #define flip_yoffset (this->hidden->flip_yoffset) | |
| 103 #define flip_address (this->hidden->flip_address) | |
| 104 #define sync_needed (this->hidden->sync_needed) | |
| 105 #define was_flipped (this->hidden->was_flipped) | |
| 106 #define SDL_nummodes (this->hidden->SDL_nummodes) | |
| 107 #define SDL_modelist (this->hidden->SDL_modelist) | |
| 108 #define surfaces (this->hidden->surfaces) | |
| 109 #define surfaces_memtotal (this->hidden->surfaces_memtotal) | |
| 110 #define surfaces_memleft (this->hidden->surfaces_memleft) | |
| 111 #define hw_lock (this->hidden->hw_lock) | |
| 112 #define DGA_event_base (this->hidden->event_base) | |
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113 #define event_lock (this->hidden->event_lock) |
| 0 | 114 |
| 115 #endif /* _SDL_dgavideo_h */ |