Mercurial > sdl-ios-xcode

annotate src/video/SDL_stretch.c @ 5157:fb424691cfc7

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Moved the rendering code out to a separate directory in the hope that it can someday be completely decoupled from the rest of the library and be expanded to an awesome 2D on 3D library.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 02 Feb 2011 14:34:54 -0800
parents af1d018ebbe6
children b530ef003506
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
3697
f7b03b6838cb Fixed bug #926
Sam Lantinga <slouken@libsdl.org>
parents: 3406
diff changeset
3 Copyright (C) 1997-2010 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;
4542
af1d018ebbe6 Better fix for bug 936
Sam Lantinga <slouken@libsdl.org>
parents: 4472
diff changeset
83 unsigned char *eip, *fence;
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
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;
4542
af1d018ebbe6 Better fix for bug 936
Sam Lantinga <slouken@libsdl.org>
parents: 4472
diff changeset
119 fence = copy_row + sizeof(copy_row)-2;
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
120 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
121 while (pos >= 0x10000L) {
4542
af1d018ebbe6 Better fix for bug 936
Sam Lantinga <slouken@libsdl.org>
parents: 4472
diff changeset
122 if (eip == fence) {
af1d018ebbe6 Better fix for bug 936
Sam Lantinga <slouken@libsdl.org>
parents: 4472
diff changeset
123 return -1;
af1d018ebbe6 Better fix for bug 936
Sam Lantinga <slouken@libsdl.org>
parents: 4472
diff changeset
124 }
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
125 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
126 *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
127 }
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++ = 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
129 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
130 }
4542
af1d018ebbe6 Better fix for bug 936
Sam Lantinga <slouken@libsdl.org>
parents: 4472
diff changeset
131 if (eip == fence) {
af1d018ebbe6 Better fix for bug 936
Sam Lantinga <slouken@libsdl.org>
parents: 4472
diff changeset
132 return -1;
af1d018ebbe6 Better fix for bug 936
Sam Lantinga <slouken@libsdl.org>
parents: 4472
diff changeset
133 }
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
134 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
135 *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
136 }
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 *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
138 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
139 }
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
140 *eip++ = RETURN;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
141
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
142 #ifdef HAVE_MPROTECT
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
143 /* 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
144 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
145 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
146 return (-1);
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
147 }
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
148 #endif
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
149 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
150 return (0);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
151 }
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 #endif /* USE_ASM_STRETCH */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
154
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
155 #define DEFINE_COPY_ROW(name, type) \
4472
791b3256fb22 Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
parents: 3697
diff changeset
156 static void name(type *src, int src_w, type *dst, int dst_w) \
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
157 { \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
158 int i; \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
159 int pos, inc; \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
160 type pixel = 0; \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
161 \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
162 pos = 0x10000; \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
163 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
164 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
165 while ( pos >= 0x10000L ) { \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
166 pixel = *src++; \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
167 pos -= 0x10000L; \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
168 } \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
169 *dst++ = pixel; \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
170 pos += inc; \
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
171 } \
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
172 }
1985
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
173 /* *INDENT-OFF* */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
174 DEFINE_COPY_ROW(copy_row1, Uint8)
1985
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
175 DEFINE_COPY_ROW(copy_row2, Uint16)
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
176 DEFINE_COPY_ROW(copy_row4, Uint32)
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
177 /* *INDENT-ON* */
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
178
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
179 /* The ASM code doesn't handle 24-bpp stretch blits */
4472
791b3256fb22 Mostly cleaned up warnings with -Wmissing-prototypes
Sam Lantinga <slouken@libsdl.org>
parents: 3697
diff changeset
180 static void
1985
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
181 copy_row3(Uint8 * src, int src_w, Uint8 * dst, int dst_w)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
182 {
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
183 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
184 int pos, inc;
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
185 Uint8 pixel[3] = { 0, 0, 0 };
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
186
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
187 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
188 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
189 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
190 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
191 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
192 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
193 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
194 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
195 }
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[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
197 *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
198 *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
199 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
200 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
201 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
202
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
203 /* Perform a stretch blit between two surfaces of the same format.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
204 NOTE: This function is not safe to call from multiple threads!
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
205 */
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
206 int
2828
7e5ff6cd05bf Added very slow software scaling to the X11 renderer
Sam Lantinga <slouken@libsdl.org>
parents: 1985
diff changeset
207 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
208 SDL_Surface * dst, const SDL_Rect * dstrect)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
209 {
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
210 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
211 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
212 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
213 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
214 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
215 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
216 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
217 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
218 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
219 SDL_Rect full_dst;
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
220 #ifdef USE_ASM_STRETCH
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
221 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
222 #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
223 int u1, u2;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
224 #endif
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
225 #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
226 const int bpp = dst->format->BytesPerPixel;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
227
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
228 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
229 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
230 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
231 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
232
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
233 /* 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
234 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
235 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
236 ((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
237 ((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
238 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
239 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
240 }
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 } 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
242 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
243 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
244 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
245 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
246 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
247 }
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 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
249 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
250 ((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
251 ((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
252 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
253 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
254 }
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 } 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
256 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
257 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
258 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
259 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
260 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
261 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
262
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
263 /* 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
264 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
265 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
266 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
267 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
268 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
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 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
271 }
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 /* 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
273 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
274 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
275 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
276 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
277 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
278 }
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 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
280 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
281 }
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
282 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
283 }
894
1d1a823904d8 Don't crash if the stretch routines are used on hardware surfaces
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
284
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
285 /* 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
286 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
287 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
288 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
289 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
290 dst_width = dstrect->w * bpp;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
291
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
292 #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
293 /* 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
294 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
295 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
296 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
297 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
298
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
299 /* 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
300 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
301 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
302 + (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
303 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
304 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
305 + (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
306 ++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
307 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
308 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
309 #ifdef USE_ASM_STRETCH
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
310 if (use_asm) {
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
311 #ifdef __GNUC__
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
312 __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
313 :"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
314 :"memory");
1442
e3242177fe4a Updated OS/2 build, yay!
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
315 #elif defined(_MSC_VER) || defined(__WATCOMC__)
1985
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
316 /* *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
317 {
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
318 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
319 __asm {
1985
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
320 push edi
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
321 push esi
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
322 mov edi, dstp
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
323 mov esi, srcp
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
324 call dword ptr code
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
325 pop esi
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
326 pop edi
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
327 }
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
328 }
1985
8055185ae4ed Added source color and alpha modulation support.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
329 /* *INDENT-ON* */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
330 #else
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
331 #error Need inline assembly for this compiler
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 } else
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
334 #endif
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
335 switch (bpp) {
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
336 case 1:
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
337 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
338 break;
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
339 case 2:
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
340 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
341 (Uint16 *) dstp, dstrect->w);
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
342 break;
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
343 case 3:
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
344 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
345 break;
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
346 case 4:
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
347 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
348 (Uint32 *) dstp, dstrect->w);
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
349 break;
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
350 }
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
351 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
352 }
894
1d1a823904d8 Don't crash if the stretch routines are used on hardware surfaces
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
353
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
354 /* 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
355 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
356 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
357 }
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 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
359 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
360 }
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
361 return (0);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
362 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
363
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
364 /* vi: set ts=4 sw=4 expandtab: */