Mercurial > sdl-ios-xcode

annotate src/video/SDL_stretch.c @ 3521:76f9b76ddf0f

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Don't add any renderers if you can't add any displays
author Sam Lantinga <slouken@libsdl.org>
date Fri, 04 Dec 2009 09:01:48 +0000
parents 8ae607392409
children f7b03b6838cb
rev   line source
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
1 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
2 SDL - Simple DirectMedia Layer
2859
99210400e8b9 Updated copyright date
Sam Lantinga <slouken@libsdl.org>
parents: 2828
diff changeset
3 Copyright (C) 1997-2009 Sam Lantinga
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
4
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
5 This library is free software; you can redistribute it and/or
1312
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 1234
diff changeset
6 modify it under the terms of the GNU Lesser General Public
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
7 License as published by the Free Software Foundation; either
1312
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 1234
diff changeset
8 version 2.1 of the License, or (at your option) any later version.
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
9
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
10 This library is distributed in the hope that it will be useful,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
1312
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 1234
diff changeset
13 Lesser General Public License for more details.
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
14
1312
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 1234
diff changeset
15 You should have received a copy of the GNU Lesser General Public
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 1234
diff changeset
16 License along with this library; if not, write to the Free Software
c9b51268668f Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents: 1234
diff changeset
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
18
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
19 Sam Lantinga
252
e8157fcb3114 Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents: 0
diff changeset
20 slouken@libsdl.org
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
21 */
1402
d910939febfa Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents: 1361
diff changeset
22 #include "SDL_config.h"
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
23
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
24 /* This a stretch blit implementation based on ideas given to me by
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
25 Tomasz Cejner - thanks! :)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
26
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
27 April 27, 2000 - Sam Lantinga
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
28 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
29
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
30 #include "SDL_video.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
31 #include "SDL_blit.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
32
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
33 /* This isn't ready for general consumption yet - it should be folded
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
34 into the general blitting mechanism.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
35 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
36
1361
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
37 #if ((defined(_MFC_VER) && defined(_M_IX86)/* && !defined(_WIN32_WCE) still needed? */) || \
1442
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
38 defined(__WATCOMC__) || \
1402
d910939febfa Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents: 1361
diff changeset
39 (defined(__GNUC__) && defined(__i386__))) && SDL_ASSEMBLY_ROUTINES
3406
8ae607392409 There's a bug with gcc 4.4.1 and -O2 where srcp doesn't get the correct value after the first scanline. Ugh.
Sam Lantinga <slouken@libsdl.org>
parents: 3405
diff changeset
40 /* There's a bug with gcc 4.4.1 and -O2 where srcp doesn't get the correct
8ae607392409 There's a bug with gcc 4.4.1 and -O2 where srcp doesn't get the correct value after the first scanline. Ugh.
Sam Lantinga <slouken@libsdl.org>
parents: 3405
diff changeset
41 * value after the first scanline. FIXME? */
8ae607392409 There's a bug with gcc 4.4.1 and -O2 where srcp doesn't get the correct value after the first scanline. Ugh.
Sam Lantinga <slouken@libsdl.org>
parents: 3405
diff changeset
42 /*#define USE_ASM_STRETCH*/
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
43 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
44
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
45 #ifdef USE_ASM_STRETCH
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
46
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
47 #ifdef HAVE_MPROTECT
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
48 #include <sys/types.h>
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
49 #include <sys/mman.h>
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
50 #endif
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
51 #ifdef __GNUC__
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
52 #define PAGE_ALIGNED __attribute__((__aligned__(4096)))
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
53 #else
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
54 #define PAGE_ALIGNED
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
55 #endif
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
56
1361
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
57 #if defined(_M_IX86) || defined(i386)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
58 #define PREFIX16 0x66
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
59 #define STORE_BYTE 0xAA
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
60 #define STORE_WORD 0xAB
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
61 #define LOAD_BYTE 0xAC
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
62 #define LOAD_WORD 0xAD
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
63 #define RETURN 0xC3
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
64 #else
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
65 #error Need assembly opcodes for this architecture
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
66 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
67
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
68 static unsigned char copy_row[4096] PAGE_ALIGNED;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
69
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
70 static int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
71 generate_rowbytes(int src_w, int dst_w, int bpp)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
72 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
73 static struct
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
74 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
75 int bpp;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
76 int src_w;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
77 int dst_w;
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
78 int status;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
79 } last;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
80
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
81 int i;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
82 int pos, inc;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
83 unsigned char *eip;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
84 unsigned char load, store;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
85
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
86 /* See if we need to regenerate the copy buffer */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
87 if ((src_w == last.src_w) && (dst_w == last.dst_w) && (bpp == last.bpp)) {
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
88 return (last.status);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
89 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
90 last.bpp = bpp;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
91 last.src_w = src_w;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
92 last.dst_w = dst_w;
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
93 last.status = -1;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
94
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
95 switch (bpp) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
96 case 1:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
97 load = LOAD_BYTE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
98 store = STORE_BYTE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
99 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
100 case 2:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
101 case 4:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
102 load = LOAD_WORD;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
103 store = STORE_WORD;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
104 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
105 default:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
106 SDL_SetError("ASM stretch of %d bytes isn't supported\n", bpp);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
107 return (-1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
108 }
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
109 #ifdef HAVE_MPROTECT
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
110 /* Make the code writeable */
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
111 if (mprotect(copy_row, sizeof(copy_row), PROT_READ | PROT_WRITE) < 0) {
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
112 SDL_SetError("Couldn't make copy buffer writeable");
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
113 return (-1);
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
114 }
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
115 #endif
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
116 pos = 0x10000;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
117 inc = (src_w << 16) / dst_w;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
118 eip = copy_row;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
119 for (i = 0; i < dst_w; ++i) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
120 while (pos >= 0x10000L) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
121 if (bpp == 2) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
122 *eip++ = PREFIX16;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
123 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
124 *eip++ = load;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
125 pos -= 0x10000L;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
126 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
127 if (bpp == 2) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
128 *eip++ = PREFIX16;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
129 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
130 *eip++ = store;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
131 pos += inc;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
132 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
133 *eip++ = RETURN;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
134
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
135 /* Verify that we didn't overflow (too late!!!) */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
136 if (eip > (copy_row + sizeof(copy_row))) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
137 SDL_SetError("Copy buffer overflow");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
138 return (-1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
139 }
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
140 #ifdef HAVE_MPROTECT
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
141 /* Make the code executable but not writeable */
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
142 if (mprotect(copy_row, sizeof(copy_row), PROT_READ | PROT_EXEC) < 0) {
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
143 SDL_SetError("Couldn't make copy buffer executable");
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
144 return (-1);
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
145 }
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
146 #endif
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
147 last.status = 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
148 return (0);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
149 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
150
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
151 #endif /* USE_ASM_STRETCH */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
152
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
153 #define DEFINE_COPY_ROW(name, type) \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
154 void name(type *src, int src_w, type *dst, int dst_w) \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
155 { \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
156 int i; \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
157 int pos, inc; \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
158 type pixel = 0; \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
159 \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
160 pos = 0x10000; \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
161 inc = (src_w << 16) / dst_w; \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
162 for ( i=dst_w; i>0; --i ) { \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
163 while ( pos >= 0x10000L ) { \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
164 pixel = *src++; \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
165 pos -= 0x10000L; \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
166 } \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
167 *dst++ = pixel; \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
168 pos += inc; \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
169 } \
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
170 }
1985
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
171 /* *INDENT-OFF* */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
172 DEFINE_COPY_ROW(copy_row1, Uint8)
1985
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
173 DEFINE_COPY_ROW(copy_row2, Uint16)
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
174 DEFINE_COPY_ROW(copy_row4, Uint32)
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
175 /* *INDENT-ON* */
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
176
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
177 /* The ASM code doesn't handle 24-bpp stretch blits */
1985
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
178 void
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
179 copy_row3(Uint8 * src, int src_w, Uint8 * dst, int dst_w)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
180 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
181 int i;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
182 int pos, inc;
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
183 Uint8 pixel[3] = { 0, 0, 0 };
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
184
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
185 pos = 0x10000;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
186 inc = (src_w << 16) / dst_w;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
187 for (i = dst_w; i > 0; --i) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
188 while (pos >= 0x10000L) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
189 pixel[0] = *src++;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
190 pixel[1] = *src++;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
191 pixel[2] = *src++;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
192 pos -= 0x10000L;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
193 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
194 *dst++ = pixel[0];
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
195 *dst++ = pixel[1];
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
196 *dst++ = pixel[2];
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
197 pos += inc;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
198 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
199 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
200
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
201 /* Perform a stretch blit between two surfaces of the same format.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
202 NOTE: This function is not safe to call from multiple threads!
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
203 */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
204 int
2828
7e5ff6cd05bf Added very slow software scaling to the X11 renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1985
diff changeset
205 SDL_SoftStretch(SDL_Surface * src, const SDL_Rect * srcrect,
7e5ff6cd05bf Added very slow software scaling to the X11 renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1985
diff changeset
206 SDL_Surface * dst, const SDL_Rect * dstrect)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
207 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
208 int src_locked;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
209 int dst_locked;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
210 int pos, inc;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
211 int dst_width;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
212 int dst_maxrow;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
213 int src_row, dst_row;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
214 Uint8 *srcp = NULL;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
215 Uint8 *dstp;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
216 SDL_Rect full_src;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
217 SDL_Rect full_dst;
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
218 #ifdef USE_ASM_STRETCH
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
219 SDL_bool use_asm = SDL_TRUE;
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
220 #ifdef __GNUC__
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
221 int u1, u2;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
222 #endif
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
223 #endif /* USE_ASM_STRETCH */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
224 const int bpp = dst->format->BytesPerPixel;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
225
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
226 if (src->format->BitsPerPixel != dst->format->BitsPerPixel) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
227 SDL_SetError("Only works with same format surfaces");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
228 return (-1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
229 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
230
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
231 /* Verify the blit rectangles */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
232 if (srcrect) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
233 if ((srcrect->x < 0) || (srcrect->y < 0) ||
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
234 ((srcrect->x + srcrect->w) > src->w) ||
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
235 ((srcrect->y + srcrect->h) > src->h)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
236 SDL_SetError("Invalid source blit rectangle");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
237 return (-1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
238 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
239 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
240 full_src.x = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
241 full_src.y = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
242 full_src.w = src->w;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
243 full_src.h = src->h;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
244 srcrect = &full_src;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
245 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
246 if (dstrect) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
247 if ((dstrect->x < 0) || (dstrect->y < 0) ||
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
248 ((dstrect->x + dstrect->w) > dst->w) ||
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
249 ((dstrect->y + dstrect->h) > dst->h)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
250 SDL_SetError("Invalid destination blit rectangle");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
251 return (-1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
252 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
253 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
254 full_dst.x = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
255 full_dst.y = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
256 full_dst.w = dst->w;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
257 full_dst.h = dst->h;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
258 dstrect = &full_dst;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
259 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
260
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
261 /* Lock the destination if it's in hardware */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
262 dst_locked = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
263 if (SDL_MUSTLOCK(dst)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
264 if (SDL_LockSurface(dst) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
265 SDL_SetError("Unable to lock destination surface");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
266 return (-1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
267 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
268 dst_locked = 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
269 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
270 /* Lock the source if it's in hardware */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
271 src_locked = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
272 if (SDL_MUSTLOCK(src)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
273 if (SDL_LockSurface(src) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
274 if (dst_locked) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
275 SDL_UnlockSurface(dst);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
276 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
277 SDL_SetError("Unable to lock source surface");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
278 return (-1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
279 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
280 src_locked = 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
281 }
894
1d1a823904d8 Don't crash if the stretch routines are used on hardware surfaces
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
282
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
283 /* Set up the data... */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
284 pos = 0x10000;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
285 inc = (srcrect->h << 16) / dstrect->h;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
286 src_row = srcrect->y;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
287 dst_row = dstrect->y;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
288 dst_width = dstrect->w * bpp;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
289
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
290 #ifdef USE_ASM_STRETCH
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
291 /* Write the opcodes for this stretch */
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
292 if ((bpp == 3) || (generate_rowbytes(srcrect->w, dstrect->w, bpp) < 0)) {
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
293 use_asm = SDL_FALSE;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
294 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
295 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
296
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
297 /* Perform the stretch blit */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
298 for (dst_maxrow = dst_row + dstrect->h; dst_row < dst_maxrow; ++dst_row) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
299 dstp = (Uint8 *) dst->pixels + (dst_row * dst->pitch)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
300 + (dstrect->x * bpp);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
301 while (pos >= 0x10000L) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
302 srcp = (Uint8 *) src->pixels + (src_row * src->pitch)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
303 + (srcrect->x * bpp);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
304 ++src_row;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
305 pos -= 0x10000L;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
306 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
307 #ifdef USE_ASM_STRETCH
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
308 if (use_asm) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
309 #ifdef __GNUC__
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
310 __asm__ __volatile__("call *%4":"=&D"(u1), "=&S"(u2)
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
311 :"0"(dstp), "1"(srcp), "r"(copy_row)
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
312 :"memory");
1442
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
313 #elif defined(_MSC_VER) || defined(__WATCOMC__)
1985
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
314 /* *INDENT-OFF* */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
315 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
316 void *code = copy_row;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
317 __asm {
1985
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
318 push edi
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
319 push esi
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
320 mov edi, dstp
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
321 mov esi, srcp
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
322 call dword ptr code
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
323 pop esi
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
324 pop edi
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
325 }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
326 }
1985
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
327 /* *INDENT-ON* */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
328 #else
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
329 #error Need inline assembly for this compiler
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
330 #endif
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
331 } else
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
332 #endif
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
333 switch (bpp) {
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
334 case 1:
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
335 copy_row1(srcp, srcrect->w, dstp, dstrect->w);
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
336 break;
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
337 case 2:
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
338 copy_row2((Uint16 *) srcp, srcrect->w,
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
339 (Uint16 *) dstp, dstrect->w);
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
340 break;
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
341 case 3:
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
342 copy_row3(srcp, srcrect->w, dstp, dstrect->w);
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
343 break;
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
344 case 4:
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
345 copy_row4((Uint32 *) srcp, srcrect->w,
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
346 (Uint32 *) dstp, dstrect->w);
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
347 break;
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
348 }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
349 pos += inc;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
350 }
894
1d1a823904d8 Don't crash if the stretch routines are used on hardware surfaces
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
351
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
352 /* We need to unlock the surfaces if they're locked */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
353 if (dst_locked) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
354 SDL_UnlockSurface(dst);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
355 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
356 if (src_locked) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
357 SDL_UnlockSurface(src);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
358 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
359 return (0);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
360 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
361
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1849
diff changeset
362 /* vi: set ts=4 sw=4 expandtab: */