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annotate src/video/SDL_blit_copy.c @ 2860:6ce28e5287e9

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Date: Sun, 07 Dec 2008 13:35:23 +0100 From: Couriersud Subject: SDL: Mouse last_x, last_y into SDL_Mouse the attached diff moves the static vars last_x and last_y into SDL_Mouse. These, as far as I understand it, should be tied to the individual mouse. The patch also makes the code check for out of window conditions of mouse->x,y when relative movements are passed to MouseSendMotion. Also attached is the latest DirectFB code (dfb20081208) supporting multiple mice and keyboards. This works quite well with sdlmame now. It however needs more testing with different directfb configurations.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 08 Dec 2008 00:52:12 +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);
5cd2a2293cf0 Okay, I figured out the intrinsics for SIMD memcpy
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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: */