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annotate src/video/SDL_stretch.c @ 4590:1ad70fb49fcb

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Fix so many things that there is little place in this column to list them all but the result is that blending modes just work now for drawing primitives. Fixes involved: 1. Fix handling of alpha channel when SDL_BLENDMODE_NONE is set. 2. Make xrendercolor use floating-point values for color channels and then convert to 16 bit ints. 3. Fix handling of visuals in SDL_x11modes.c so that a 32 bit ARGB visual is used. 4. Fix the background pixel value in SDL_x11window.c so that the window background has an alpha value of 0xFF and not 0.
author Sunny Sachanandani <sunnysachanandani@gmail.com>
date Fri, 09 Jul 2010 21:36:41 +0530
parents f7b03b6838cb
children 791b3256fb22
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 /* This a stretch blit implementation based on ideas given to me by
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25 Tomasz Cejner - thanks! :)
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26
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27 April 27, 2000 - Sam Lantinga
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28 */
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29
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30 #include "SDL_video.h"
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31 #include "SDL_blit.h"
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32
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33 /* This isn't ready for general consumption yet - it should be folded
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34 into the general blitting mechanism.
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35 */
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36
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37 #if ((defined(_MFC_VER) && defined(_M_IX86)/* && !defined(_WIN32_WCE) still needed? */) || \
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38 defined(__WATCOMC__) || \
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39 (defined(__GNUC__) && defined(__i386__))) && SDL_ASSEMBLY_ROUTINES
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40 /* There's a bug with gcc 4.4.1 and -O2 where srcp doesn't get the correct
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41 * value after the first scanline. FIXME? */
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42 /*#define USE_ASM_STRETCH*/
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43 #endif
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44
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45 #ifdef USE_ASM_STRETCH
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46
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47 #ifdef HAVE_MPROTECT
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48 #include <sys/types.h>
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49 #include <sys/mman.h>
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50 #endif
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51 #ifdef __GNUC__
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52 #define PAGE_ALIGNED __attribute__((__aligned__(4096)))
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53 #else
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54 #define PAGE_ALIGNED
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55 #endif
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56
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57 #if defined(_M_IX86) || defined(i386)
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58 #define PREFIX16 0x66
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59 #define STORE_BYTE 0xAA
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60 #define STORE_WORD 0xAB
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61 #define LOAD_BYTE 0xAC
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62 #define LOAD_WORD 0xAD
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63 #define RETURN 0xC3
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64 #else
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65 #error Need assembly opcodes for this architecture
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66 #endif
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67
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68 static unsigned char copy_row[4096] PAGE_ALIGNED;
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69
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70 static int
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71 generate_rowbytes(int src_w, int dst_w, int bpp)
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72 {
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73 static struct
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74 {
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75 int bpp;
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76 int src_w;
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77 int dst_w;
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78 int status;
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79 } last;
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80
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81 int i;
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82 int pos, inc;
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83 unsigned char *eip;
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84 unsigned char load, store;
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85
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86 /* See if we need to regenerate the copy buffer */
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87 if ((src_w == last.src_w) && (dst_w == last.dst_w) && (bpp == last.bpp)) {
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88 return (last.status);
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89 }
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90 last.bpp = bpp;
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91 last.src_w = src_w;
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92 last.dst_w = dst_w;
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93 last.status = -1;
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94
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95 switch (bpp) {
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96 case 1:
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97 load = LOAD_BYTE;
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98 store = STORE_BYTE;
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99 break;
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100 case 2:
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101 case 4:
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102 load = LOAD_WORD;
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103 store = STORE_WORD;
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104 break;
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105 default:
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106 SDL_SetError("ASM stretch of %d bytes isn't supported\n", bpp);
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107 return (-1);
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108 }
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109 #ifdef HAVE_MPROTECT
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110 /* Make the code writeable */
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111 if (mprotect(copy_row, sizeof(copy_row), PROT_READ | PROT_WRITE) < 0) {
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112 SDL_SetError("Couldn't make copy buffer writeable");
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113 return (-1);
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114 }
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115 #endif
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116 pos = 0x10000;
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117 inc = (src_w << 16) / dst_w;
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118 eip = copy_row;
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119 for (i = 0; i < dst_w; ++i) {
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120 while (pos >= 0x10000L) {
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121 if (bpp == 2) {
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122 *eip++ = PREFIX16;
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123 }
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124 *eip++ = load;
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125 pos -= 0x10000L;
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126 }
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127 if (bpp == 2) {
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128 *eip++ = PREFIX16;
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129 }
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130 *eip++ = store;
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131 pos += inc;
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132 }
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133 *eip++ = RETURN;
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134
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135 /* Verify that we didn't overflow (too late!!!) */
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136 if (eip > (copy_row + sizeof(copy_row))) {
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137 SDL_SetError("Copy buffer overflow");
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138 return (-1);
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139 }
3405
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140 #ifdef HAVE_MPROTECT
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141 /* Make the code executable but not writeable */
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142 if (mprotect(copy_row, sizeof(copy_row), PROT_READ | PROT_EXEC) < 0) {
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143 SDL_SetError("Couldn't make copy buffer executable");
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144 return (-1);
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145 }
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146 #endif
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147 last.status = 0;
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148 return (0);
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149 }
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150
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151 #endif /* USE_ASM_STRETCH */
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152
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153 #define DEFINE_COPY_ROW(name, type) \
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154 void name(type *src, int src_w, type *dst, int dst_w) \
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155 { \
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156 int i; \
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157 int pos, inc; \
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158 type pixel = 0; \
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159 \
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160 pos = 0x10000; \
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161 inc = (src_w << 16) / dst_w; \
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162 for ( i=dst_w; i>0; --i ) { \
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163 while ( pos >= 0x10000L ) { \
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164 pixel = *src++; \
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165 pos -= 0x10000L; \
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166 } \
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167 *dst++ = pixel; \
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168 pos += inc; \
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169 } \
0
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170 }
1985
8055185ae4ed Added source color and alpha modulation support.
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diff changeset
171 /* *INDENT-OFF* */
0
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172 DEFINE_COPY_ROW(copy_row1, Uint8)
1985
8055185ae4ed Added source color and alpha modulation support.
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diff changeset
173 DEFINE_COPY_ROW(copy_row2, Uint16)
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diff changeset
174 DEFINE_COPY_ROW(copy_row4, Uint32)
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diff changeset
175 /* *INDENT-ON* */
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176
0
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177 /* The ASM code doesn't handle 24-bpp stretch blits */
1985
8055185ae4ed Added source color and alpha modulation support.
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diff changeset
178 void
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diff changeset
179 copy_row3(Uint8 * src, int src_w, Uint8 * dst, int dst_w)
0
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180 {
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181 int i;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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182 int pos, inc;
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183 Uint8 pixel[3] = { 0, 0, 0 };
0
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184
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185 pos = 0x10000;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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186 inc = (src_w << 16) / dst_w;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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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.
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188 while (pos >= 0x10000L) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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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.
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diff changeset
190 pixel[1] = *src++;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
191 pixel[2] = *src++;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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192 pos -= 0x10000L;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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193 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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194 *dst++ = pixel[0];
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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195 *dst++ = pixel[1];
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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196 *dst++ = pixel[2];
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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197 pos += inc;
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198 }
0
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199 }
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200
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diff changeset
201 /* Perform a stretch blit between two surfaces of the same format.
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202 NOTE: This function is not safe to call from multiple threads!
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203 */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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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
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parents: 1985
diff changeset
206 SDL_Surface * dst, const SDL_Rect * dstrect)
0
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207 {
1895
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diff changeset
208 int src_locked;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
209 int dst_locked;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
210 int pos, inc;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
211 int dst_width;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
212 int dst_maxrow;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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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.
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diff changeset
214 Uint8 *srcp = NULL;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
215 Uint8 *dstp;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
216 SDL_Rect full_src;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
217 SDL_Rect full_dst;
3405
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diff changeset
218 #ifdef USE_ASM_STRETCH
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
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diff changeset
219 SDL_bool use_asm = SDL_TRUE;
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
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diff changeset
220 #ifdef __GNUC__
1895
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diff changeset
221 int u1, u2;
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222 #endif
3405
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diff changeset
223 #endif /* USE_ASM_STRETCH */
1895
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224 const int bpp = dst->format->BytesPerPixel;
0
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225
1895
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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.
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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.
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diff changeset
228 return (-1);
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diff changeset
229 }
0
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230
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diff changeset
231 /* Verify the blit rectangles */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
232 if (srcrect) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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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.
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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.
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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.
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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.
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diff changeset
237 return (-1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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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>
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diff changeset
239 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
240 full_src.x = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
241 full_src.y = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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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.
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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.
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diff changeset
244 srcrect = &full_src;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
245 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
246 if (dstrect) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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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.
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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.
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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.
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250 SDL_SetError("Invalid destination blit rectangle");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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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>
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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>
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diff changeset
253 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
254 full_dst.x = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
255 full_dst.y = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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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.
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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.
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diff changeset
258 dstrect = &full_dst;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
259 }
0
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parents:
diff changeset
260
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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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.
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diff changeset
262 dst_locked = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1849
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263 if (SDL_MUSTLOCK(dst)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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parents: 1849
diff changeset
276 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1849
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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.
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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.
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parents: 1849
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280 src_locked = 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1849
diff changeset
281 }
894
1d1a823904d8 Don't crash if the stretch routines are used on hardware surfaces
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parents: 769
diff changeset
282
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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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.
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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.
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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.
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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.
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parents: 1849
diff changeset
288 dst_width = dstrect->w * bpp;
0
74212992fb08 Initial revision
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parents:
diff changeset
289
74212992fb08 Initial revision
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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.
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parents: 1849
diff changeset
291 /* Write the opcodes for this stretch */
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
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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.
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294 }
0
74212992fb08 Initial revision
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parents:
diff changeset
295 #endif
74212992fb08 Initial revision
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parents:
diff changeset
296
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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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.
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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
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parents: 2859
diff changeset
308 if (use_asm) {
0
74212992fb08 Initial revision
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parents:
diff changeset
309 #ifdef __GNUC__
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
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diff changeset
310 __asm__ __volatile__("call *%4":"=&D"(u1), "=&S"(u2)
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
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parents: 2859
diff changeset
311 :"0"(dstp), "1"(srcp), "r"(copy_row)
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
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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
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parents:
diff changeset
328 #else
74212992fb08 Initial revision
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parents:
diff changeset
329 #error Need inline assembly for this compiler
74212992fb08 Initial revision
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parents:
diff changeset
330 #endif
3405
d5f2dd33f4eb Merged improvements to SDL_SoftStretch() from SDL 1.2
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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: */