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annotate src/video/SDL_blit_copy.c @ 3168:6338b7f2d024

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Hi, I have prepared a set of patches to readd WindowsCE support to SDL 1.3. I've created a new GAPI/Rawframebuffer and a DirectDraw renderer. Both renderers are work in progress and there are several unimplemented cases. (Notably RenderLine/RenderPoint/RenderFill/QueryTexturePixels/UpdateTexture and texture blending ) Nevertheless I am successfully using these renderers together with the SDL software renderer. (On most devices the SDL software renderer will be much faster as there are only badly optimized vendor drivers available) I send these patches now in this unpolished state because there seems to be some interest in win ce and someone has to start supporting SDL 1.3 Now on to the patches: wince_events_window_fixes.patch fixes some wince incompatibilities and adds fullscreen support via SHFullScreen. NOTE: This patch shouldn't have any side effects on Windows, but I have NOT tested it on Windows, so please double-check. This patch doesn't dependent on the following ones. wince_renderers_system.patch This patch does all necessary modifications to the SDL system. - it adds the renderers to the configure system - it adds the renderers to win32video SDL_ceddrawrender.c SDL_ceddrawrender.h SDL_gapirender_c.h SDL_gapirender.c SDL_gapirender.h these files add the new render drivers and should be placed in src/video/win32 Some notes to people who want to test this: - I have only compiled sdl with ming32ce, so the VisualC files are not up to date - As mingw32ce has no ddraw.h this file must be taken from the MS SDK and modified to work with gcc - I had to modify line 2611 in configure.in to EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lcoredll -lcommctrl -lmmtimer -Wl,--image-base -Wl,0x10000" otherwise GetCPinfo wouldn't link. If someone knows whats causing this I'd be happy to hear about it. It would be great if these patches could make their way into SVN as this would make collaboration much much easier. I'm out of office for the next week and therefore will be unavailable via email. Regards Stefan
author Sam Lantinga <slouken@libsdl.org>
date Sun, 07 Jun 2009 02:44:46 +0000
parents 99210400e8b9
children 72024425b437
rev   line source
2247
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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 #include "SDL_video.h"
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25 #include "SDL_blit.h"
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26 #include "SDL_blit_copy.h"
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27
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28
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29 #ifdef __SSE__
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30 /* This assumes 16-byte aligned src and dst */
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31 static __inline__ void
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32 SDL_memcpySSE(Uint8 * dst, const Uint8 * src, int len)
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33 {
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34 int i;
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35
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36 __m128 values[4];
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37 for (i = len / 64; i--;) {
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38 _mm_prefetch(src, _MM_HINT_NTA);
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39 values[0] = *(__m128 *) (src + 0);
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40 values[1] = *(__m128 *) (src + 16);
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41 values[2] = *(__m128 *) (src + 32);
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42 values[3] = *(__m128 *) (src + 48);
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43 _mm_stream_ps((float *) (dst + 0), values[0]);
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44 _mm_stream_ps((float *) (dst + 16), values[1]);
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45 _mm_stream_ps((float *) (dst + 32), values[2]);
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46 _mm_stream_ps((float *) (dst + 48), values[3]);
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47 src += 64;
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48 dst += 64;
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49 }
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50
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51 if (len & 63)
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52 SDL_memcpy(dst, src, len & 63);
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53 }
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54 #endif /* __SSE__ */
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55
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56 #ifdef __MMX__
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57 #ifdef _MSC_VER
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58 #pragma warning(disable:4799)
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59 #endif
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60 /* This assumes 8-byte aligned src and dst */
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61 static __inline__ void
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62 SDL_memcpyMMX(Uint8 * dst, const Uint8 * src, int len)
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63 {
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64 int i;
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65
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66 __m64 values[8];
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67 for (i = len / 64; i--;) {
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68 _mm_prefetch(src, _MM_HINT_NTA);
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69 values[0] = *(__m64 *) (src + 0);
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70 values[1] = *(__m64 *) (src + 8);
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71 values[2] = *(__m64 *) (src + 16);
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72 values[3] = *(__m64 *) (src + 24);
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73 values[4] = *(__m64 *) (src + 32);
5cd2a2293cf0 Okay, I figured out the intrinsics for SIMD memcpy
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74 values[5] = *(__m64 *) (src + 40);
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75 values[6] = *(__m64 *) (src + 48);
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76 values[7] = *(__m64 *) (src + 56);
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77 _mm_stream_pi((__m64 *) (dst + 0), values[0]);
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78 _mm_stream_pi((__m64 *) (dst + 8), values[1]);
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79 _mm_stream_pi((__m64 *) (dst + 16), values[2]);
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80 _mm_stream_pi((__m64 *) (dst + 24), values[3]);
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81 _mm_stream_pi((__m64 *) (dst + 32), values[4]);
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82 _mm_stream_pi((__m64 *) (dst + 40), values[5]);
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83 _mm_stream_pi((__m64 *) (dst + 48), values[6]);
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84 _mm_stream_pi((__m64 *) (dst + 56), values[7]);
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85 src += 64;
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86 dst += 64;
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87 }
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88
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89 if (len & 63)
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90 SDL_memcpy(dst, src, len & 63);
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91 }
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92 #endif /* __MMX__ */
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93
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94 void
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95 SDL_BlitCopy(SDL_BlitInfo * info)
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96 {
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97 Uint8 *src, *dst;
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98 int w, h;
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99 int srcskip, dstskip;
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100
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101 w = info->dst_w * info->dst_fmt->BytesPerPixel;
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102 h = info->dst_h;
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103 src = info->src;
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104 dst = info->dst;
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105 srcskip = info->src_pitch;
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106 dstskip = info->dst_pitch;
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107
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108 #ifdef __SSE__
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109 if (SDL_HasSSE() &&
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110 !((uintptr_t) src & 15) && !(srcskip & 15) &&
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111 !((uintptr_t) dst & 15) && !(dstskip & 15)) {
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112 while (h--) {
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113 SDL_memcpySSE(dst, src, w);
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114 src += srcskip;
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115 dst += dstskip;
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116 }
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117 return;
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118 }
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119 #endif
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120
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121 #ifdef __MMX__
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122 if (SDL_HasMMX() &&
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123 !((uintptr_t) src & 7) && !(srcskip & 7) &&
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124 !((uintptr_t) dst & 7) && !(dstskip & 7)) {
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125 while (h--) {
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126 SDL_memcpyMMX(dst, src, w);
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127 src += srcskip;
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128 dst += dstskip;
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129 }
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130 _mm_empty();
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131 return;
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132 }
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133 #endif
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134
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135 while (h--) {
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136 SDL_memcpy(dst, src, w);
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137 src += srcskip;
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138 dst += dstskip;
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139 }
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140 }
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141
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142 void
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143 SDL_BlitCopyOverlap(SDL_BlitInfo * info)
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144 {
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145 Uint8 *src, *dst;
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146 int w, h;
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147 int skip;
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148
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149 w = info->dst_w * info->dst_fmt->BytesPerPixel;
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150 h = info->dst_h;
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151 src = info->src;
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152 dst = info->dst;
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153 skip = info->src_pitch;
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154 if ((dst < src) || (dst >= (src + h * skip))) {
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155 SDL_BlitCopy(info);
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156 } else {
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157 src += ((h - 1) * skip);
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158 dst += ((h - 1) * skip);
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159 while (h--) {
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160 SDL_revcpy(dst, src, w);
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161 src -= skip;
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162 dst -= skip;
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163 }
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164 }
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165 }
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166
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167 /* vi: set ts=4 sw=4 expandtab: */