annotate window/render.cc @ 71:1fd20d231376

Fix objScale with 2D zoom; implement objWidth and objHeight.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Fri, 01 Apr 2011 23:49:12 +0200
parents 4416cfac86ae
children
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1 /*
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2 * Copyright (c) 2004-2006 Kazunori "jagarl" Ueno
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3 * All rights reserved.
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4 *
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5 * Redistribution and use in source and binary forms, with or without
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6 * modification, are permitted provided that the following conditions
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7 * are met:
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8 * 1. Redistributions of source code must retain the above copyright
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9 * notice, this list of conditions and the following disclaimer.
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10 * 2. Redistributions in binary form must reproduce the above copyright
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11 * notice, this list of conditions and the following disclaimer in the
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12 * documentation and/or other materials provided with the distribution.
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13 * 3. The name of the author may not be used to endorse or promote products
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14 * derived from this software without specific prior written permission.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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26 */
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27
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28 #include "font/font.h"
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29 #include "font/text.h"
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c7bcc0ec2267 * replaced Grp and Text classes by the TextImpl and GrpImpl ones
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30 #include "SDL.h"
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31 #include "render.h"
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32 #include "rect.h"
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33 #include "surface.h"
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34 #include <stdio.h>
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35
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36 #ifndef ALPHA_MAX
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37 #define ALPHA_MAX 255
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38 #endif
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39
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40 Rect::Rect(const TextGlyph& letter) {
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41 lx = letter.x + letter.glyph->bitmap_left;
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42 rx = lx + letter.glyph->bitmap.width;
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43
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44 ty = letter.y - letter.glyph->bitmap_top;
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45 by = ty + letter.glyph->bitmap.rows;
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46 }
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47
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48 Rect::Rect(const class Surface& so) {
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49 SDL_Surface* s = (SDL_Surface*)(&so);
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50 lx = 0; ty = 0;
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51 rx = s->w; by = s->h;
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52 }
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53
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54 inline Rect _Rect(const SDL_Rect& r) {
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55 return Rect(r.x, r.y, r.x+r.w, r.y+r.h);
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56 }
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57
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58 inline SDL_Rect SDLed(const Rect& rect) {
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59 SDL_Rect r;
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60 r.x = rect.lx;
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61 r.y = rect.ty;
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62 r.w = rect.rx-rect.lx;
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63 r.h = rect.by-rect.ty;
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64 return r;
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65 }
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66
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67 Rect DSurfaceRenderText(TextGlyphStream::iterator start, TextGlyphStream::iterator end, const Rect& srcrect,
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68 Surface* dst_o, const Rect& dstrect) {
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69
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70 SDL_Surface* dst = (SDL_Surface*)dst_o;
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71 Rect confine_to(srcrect);
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72 Rect dst_clip(_Rect(dst->clip_rect));
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73 Rect drawn_rect(0,0,0,0);
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74
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75 int dif_x = dstrect.lx - srcrect.lx;
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76 int dif_y = dstrect.ty - srcrect.ty;
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77
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78 dst_clip.rmove(-dif_x, -dif_y);
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79 confine_to.intersect(dst_clip);
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80
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81 TextGlyphStream::iterator it;
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82 SDL_PixelFormat& fmt = *dst->format;
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83 int ashift = fmt.Ashift - fmt.Aloss; int amask = fmt.Amask;
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84 int dbpl = dst->pitch;
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85 int dbpp = fmt.BytesPerPixel;
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86
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87 SDL_LockSurface(dst);
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88 for (it=start; it!=end; it++) {
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89 Rect letter_r(*it);
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90 letter_r.intersect(confine_to);
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91 if (letter_r.empty()) continue;
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92 drawn_rect.join(letter_r);
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93
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94 int w = letter_r.width();
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95 int h = letter_r.height();
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96 int sbpl = it->glyph->bitmap.width;
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97
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98 unsigned char* smem = it->glyph->bitmap.buffer +
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99 (letter_r.ty - (it->y-it->glyph->bitmap_top)) * sbpl +
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100 (letter_r.lx - (it->x+it->glyph->bitmap_left));
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101 char* dmem = (char*)dst->pixels +
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102 (letter_r.ty + dif_y) * dbpl +
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103 (letter_r.lx + dif_x) * dbpp;
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104 Uint32 pixel = ((int(it->r)<<fmt.Rshift)&fmt.Rmask) |((int(it->g)<<fmt.Gshift)&fmt.Gmask) |((int(it->b)<<fmt.Bshift)&fmt.Bmask);
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105 int i,j;
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106 if (!it->is_rev) {
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107 if (dbpp == 4) {
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108 for (i=0; i<h; i++) {
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109 for (j=0; j<w; j++) {
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110 int alpha = smem[j];
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111 ((Uint32*)dmem)[j] = pixel | ((alpha << ashift)&amask);
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112 }
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113 smem += sbpl; dmem += dbpl;
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114 }
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115 } else if (dbpp == 2) {
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116 for (i=0; i<h; i++) {
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117 for (j=0; j<w; j++) {
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118 int alpha = smem[j];
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119 ((Uint16*)dmem)[j] = pixel | ((alpha << ashift)&amask);
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120 }
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121 smem += sbpl; dmem += dbpl;
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122 }
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123 } else abort();
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124 } else { /* reversed */
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125 if (dbpp == 4) {
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126 for (i=0; i<h; i++) {
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127 for (j=0; j<w; j++) {
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128 int alpha = 255 - smem[j];
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129 ((Uint32*)dmem)[j] = pixel | ((alpha << ashift)&amask);
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130 }
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131 smem += sbpl; dmem += dbpl;
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132 }
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133 } else if (dbpp == 2) {
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134 for (i=0; i<h; i++) {
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135 for (j=0; j<w; j++) {
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136 int alpha = 255 - smem[j];
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137 ((Uint16*)dmem)[j] = pixel | ((alpha << ashift)&amask);
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138 }
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139 smem += sbpl; dmem += dbpl;
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140 }
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141 } else abort();
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142 }
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143 }
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144 SDL_UnlockSurface(dst);
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145 drawn_rect.rmove(dif_x, dif_y);
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146 return drawn_rect;
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147 }
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148
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149 void DSurfaceFill(Surface* src_o, const Rect& rect, int r, int g, int b, int a) {
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150 SDL_Rect sr = SDLed(rect);
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151 SDL_Surface* src = (SDL_Surface*)src_o;
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152 SDL_FillRect( src, &sr, SDL_MapRGBA(src->format, r, g, b, a));
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153 }
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154
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155 static void clip_rect(Rect& srcrect, Rect& dstrect, SDL_Surface* dstsurf) {
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156 Rect confine_to(srcrect);
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157 Rect dst_clip(_Rect(dstsurf->clip_rect));
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158
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159 int dif_x = dstrect.lx - srcrect.lx;
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160 int dif_y = dstrect.ty - srcrect.ty;
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161
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162 dst_clip.rmove(-dif_x, -dif_y);
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163 confine_to.intersect(dst_clip);
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164
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165 srcrect = confine_to;
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166 dstrect = confine_to;
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167 dstrect.rmove(dif_x, dif_y);
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168 }
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169
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170 void DSurfaceMove(Surface* src_o, const Rect& srcrect_o, Surface* dst_o, const Rect& dstrect_o) {
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171
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172 SDL_Surface* dst = (SDL_Surface*)dst_o;
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173 SDL_Surface* src = (SDL_Surface*)src_o;
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174
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175 if (dst->format->BytesPerPixel != src->format->BytesPerPixel) return; // RGB変換はできない
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176
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177 Rect srcrect(srcrect_o), dstrect(dstrect_o);
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178 clip_rect(srcrect, dstrect, dst);
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179
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180 SDL_LockSurface(dst); SDL_LockSurface(src);
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181 int sbpl = src->pitch;
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182 int dbpl = dst->pitch;
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183 int bpp = dst->format->BytesPerPixel;
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184 int width = bpp * srcrect.width();
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185 int height = srcrect.height();
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186 char* smem = src_o->mem(srcrect);
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187 char* dmem = dst_o->mem(dstrect);
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188 char* smem_end = src_o->mem_end(srcrect);
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189 char* dmem_end = dst_o->mem_end(dstrect);
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190
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191 // メモリに重なりがあり、src が上位側の場合、コピー方向を逆転する
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192 if (smem < dmem && dmem < smem_end) {
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193 int i,j;
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194 for (i=0; i<height; i++) {
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195 char* s = smem_end; char* d = dmem_end;
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196 for (j=0; j<width; j++)
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197 *--d = *--s;
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198 dmem_end -= dbpl; smem_end -= sbpl;
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199 }
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200 } else {
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201 int i;
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202 for (i=0; i<height; i++) {
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203 memcpy(dmem, smem, width);
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204 dmem += dbpl; smem += sbpl;
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205 }
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206 }
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207 SDL_UnlockSurface(dst);
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208 SDL_UnlockSurface(src);
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209 }
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210
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211 void DSurfaceFillA(Surface* dsto, const Rect& rect, int r, int g, int b, int a) {
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212 SDL_Surface* dst = (SDL_Surface*)dsto;
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213 SDL_LockSurface( dst);
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214 int dbpl = dst->pitch;
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215 int bpp = dst->format->BytesPerPixel;
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216 int width = rect.width();
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217 int height = rect.height();
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218 int amask = dst->format->Amask;
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219 int ashift = dst->format->Ashift - dst->format->Aloss;
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220
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221 char* dmem = (char*)(dst->pixels) + rect.ty*dbpl + rect.lx*bpp;
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222 unsigned int pixel = SDL_MapRGBA(dst->format, r, g, b, 0);
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223 unsigned int pixela = SDL_MapRGBA(dst->format, r, g, b, a);
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224 a += a>>7; /* 0-256 にする */
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225 int i, j;
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226 for (i=0; i<height; i++) {
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227 char* d = dmem;
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228 if (bpp == 4) {
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229 for (j=0; j<width; j++) {
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230 int alpha = (*(Uint32*)d)>>ashift;
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231 if (alpha == 0) (*(Uint32*)d) = pixel;
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232 else if (alpha == 255) *((Uint32*)d) = pixela;
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233 else { *((Uint32*)d) = pixel | ((((alpha*a)>>8)<<ashift)&amask); }
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234 d += bpp;
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235 }
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236 } else if (bpp == 2) {
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237 for (j=0; j<width; j++) {
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238 int alpha = (*(Uint16*)d)>>ashift;
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239 if (alpha == 0) *((Uint16*)d) = pixel;
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240 else if (alpha == 255) *((Uint16*)d) = pixela;
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241 else { *((Uint16*)d) = pixel | ((((alpha*a)>>8)<<ashift)&amask); }
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242 d += bpp;
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243 }
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244 }
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245 dmem += dbpl;
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246 }
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247 SDL_UnlockSurface( dst);
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248 }
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249
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250 #define ASHIFT 24
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251 #define CMASK1 0xff00ff
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252 #define CMASK2 0x00ff00
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253
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254 inline void blit_pixel(Uint32* dest, Uint32* src, const unsigned char* alpha, bool use_srcalpha) {
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255 Uint32 dest_value = *dest;
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256 Uint32 src_value = *src;
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257 Uint32 as = src_value >> ASHIFT;
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258 if (as == 255 || (!use_srcalpha) ) {
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259 as = *alpha;
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260 } else {
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261 as += (as >> 7); /* 0-0xff -> 0-0x100 */
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262 as *= *alpha;
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263 as >>= 8;
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264 }
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265 as += as >> 7;
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266 // Isolate Red and Blue components
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267 Uint32 src_c1 = src_value & CMASK1;
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268 Uint32 dest_c1 = dest_value & CMASK1;
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269 // Blend Red and Blue components
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270 dest_c1 = (dest_c1 + (((src_c1-dest_c1) * as) >> 8)) & CMASK1;
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271 // Isolate Green component
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272 src_value &= CMASK2;
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273 dest_value &= CMASK2;
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274 // Blend Green component
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275 dest_value = (dest_value + (((src_value-dest_value) * as) >> 8)) & CMASK2;
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276 // Put it alltogether
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277 *dest = dest_c1 | dest_value | 0xff000000;
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278 }
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279
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280 static void blit_line(Uint32* dest, Uint32* src, const unsigned char* alpha,int ax0, int ax1, int awidth, int aj0, int aj1, bool use_srcalpha) {
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281 int j;
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282 int ax = ax0;
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283 const unsigned char* a = alpha + ax0;
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284 if (awidth == 1) { // わりとよくあるので最適化
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285 for (j=aj0; j < aj1; j++) {
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286 blit_pixel(dest++, src++, alpha, use_srcalpha);
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287 }
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288 }
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289 else
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290 {
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291 for (j=aj0; j < aj1; j++) {
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292 for (; ax<awidth; ax++)
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293 blit_pixel(dest++, src++, a++, use_srcalpha);
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294 ax = 0;
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295 a = alpha;
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296 }
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297 for (; ax < ax1; ax++)
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298 blit_pixel(dest++, src++, a++, use_srcalpha);
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299 }
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300 }
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301
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302 void DSurfaceBlitAlpha(Surface* src_o, const Rect& srcrect_o, Surface* dst_o, const Rect& dstrect_o, const unsigned char* alpha, const Rect& alpharect)
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303 {
0
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304 SDL_Surface* dst = (SDL_Surface*)dst_o;
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305 SDL_Surface* src = (SDL_Surface*)src_o;
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306 SDL_PixelFormat& fmt = *dst->format;
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307
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308 Rect srcrect(srcrect_o), dstrect(dstrect_o);
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309 clip_rect(srcrect, dstrect, dst);
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310
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311 int awidth = alpharect.width();
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312 int aheight = alpharect.height();
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313 if (awidth == 0 || aheight == 0) return;
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314 int ax0 = srcrect.lx % awidth;
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315 int ay0 = srcrect.ty % aheight;
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316 int aj0 = srcrect.lx / awidth;
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317 int ai0 = srcrect.ty / aheight;
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318 int ax1 = srcrect.rx % awidth;
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319 int ay1 = srcrect.by % aheight;
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320 int aj1 = srcrect.rx / awidth;
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321 int ai1 = srcrect.by / aheight;
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322
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323 SDL_LockSurface(dst);
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324 SDL_LockSurface(src);
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325 int dbpl = dst->pitch;
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326 int sbpl = src->pitch;
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327 int bpp = dst->format->BytesPerPixel;
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328
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329 char* dmem = dst_o->mem(dstrect);
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330 char* smem = src_o->mem(srcrect);
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331
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332 const unsigned char* amem = alpha + ay0 * awidth;
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333 int i;
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334 int ay = ay0;
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335 for (i = ai0; i < ai1; i++) {
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336 for (; ay < aheight; ay++) {
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337 if (src->format->Amask == 0)
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338 blit_line( (Uint32*)dmem, (Uint32*)smem, amem,ax0, ax1, awidth, aj0, aj1, false);
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339 else
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340 blit_line( (Uint32*)dmem, (Uint32*)smem, amem,ax0, ax1, awidth, aj0, aj1, true);
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341 amem += awidth; dmem += dbpl; smem += sbpl;
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342 }
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343 ay = 0; amem = alpha;
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344 }
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345 for (; ay < ay1; ay++) {
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346 if (src->format->Amask == 0)
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347 blit_line( (Uint32*)dmem, (Uint32*)smem, amem,ax0, ax1, awidth, aj0, aj1, false);
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348 else
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349 blit_line( (Uint32*)dmem, (Uint32*)smem, amem,ax0, ax1, awidth, aj0, aj1, true);
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350 amem += awidth; dmem += dbpl; smem += sbpl;
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351 }
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352 SDL_UnlockSurface(src);
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353 SDL_UnlockSurface(dst);
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354 }
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355
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diff changeset
356 void DSurfaceBlitAdd(Surface* src_o, const Rect& srcrect_o, Surface* dst_o, const Rect& dstrect_o, unsigned char alpha) {
0
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357 SDL_Surface* dst = (SDL_Surface*)dst_o;
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358 SDL_Surface* src = (SDL_Surface*)src_o;
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359
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360 if (dst->format->BytesPerPixel != src->format->BytesPerPixel) return; // RGB変換はできない
0
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361
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362 Rect srcrect(srcrect_o), dstrect(dstrect_o);
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363 clip_rect(srcrect, dstrect, dst);
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364
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365 SDL_LockSurface(dst); SDL_LockSurface(src);
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366 int sbpl = src->pitch;
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367 int dbpl = dst->pitch;
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368 int bpp = dst->format->BytesPerPixel;
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369 int width = srcrect.width();
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370 int height = srcrect.height();
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371 char* smem = src_o->mem(srcrect);
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372 char* dmem = dst_o->mem(dstrect);
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373 char* smem_end = src_o->mem_end(srcrect);
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374 char* dmem_end = dst_o->mem_end(dstrect);
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375
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376 SDL_PixelFormat& fmt = *dst->format;
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377 int rshift = fmt.Rshift - fmt.Rloss; int rmask = fmt.Rmask;
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378 int gshift = fmt.Gshift - fmt.Gloss; int gmask = fmt.Gmask;
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379 int bshift = fmt.Bshift - fmt.Bloss; int bmask = fmt.Bmask;
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380 int ashift = src->format->Ashift - src->format->Aloss; int amask = src->format->Amask;
0
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381 int allmask = rmask | gmask | bmask;
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diff changeset
382 int i, j;
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diff changeset
383 for (i=0; i < height; i++) {
0
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384 char* d = dmem; char* s = smem;
60
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385 for (j=0; j < width; j++) {
0
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386 Uint32 sd = *(Uint32*)s;
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387 Uint32 dd = *(Uint32*)d;
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388 if (sd&allmask) {
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389 Uint32 sr = (sd&rmask)>>rshift;
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390 Uint32 sg = (sd&gmask)>>gshift;
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391 Uint32 sb = (sd&bmask)>>bshift;
60
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392 Uint32 alpha2 = alpha;
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diff changeset
393 if (amask)
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diff changeset
394 {
e16e13d8cd68 Replaced SATURATE -> ADD, implemented objComposite, corrected minor things
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diff changeset
395 alpha2 = ((sd&amask)>>ashift);
e16e13d8cd68 Replaced SATURATE -> ADD, implemented objComposite, corrected minor things
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diff changeset
396 alpha2 += alpha2 >> 7;
e16e13d8cd68 Replaced SATURATE -> ADD, implemented objComposite, corrected minor things
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diff changeset
397 alpha2 *= alpha;
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diff changeset
398 alpha2 >>= 8;
e16e13d8cd68 Replaced SATURATE -> ADD, implemented objComposite, corrected minor things
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diff changeset
399 }
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diff changeset
400
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401 if (alpha2 != ALPHA_MAX) {
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402 sr = (sr*alpha2)>>8;
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403 sg = (sg*alpha2)>>8;
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404 sb = (sb*alpha2)>>8;
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405 }
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406 Uint32 dr = sr + ((dd&rmask)>>rshift);
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407 Uint32 dg = sg + ((dd&gmask)>>gshift);
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408 Uint32 db = sb + ((dd&bmask)>>bshift);
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409 if (dr > 255) dr = 255;
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410 if (dg > 255) dg = 255;
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411 if (db > 255) db = 255;
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412 *(Uint32*)d = ((dr<<rshift)&rmask)| ((dg<<gshift)&gmask)| ((db<<bshift)&bmask);
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413 }
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414 s += bpp; d += bpp;
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415 }
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416 dmem += dbpl; smem += sbpl;
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417 }
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418 SDL_UnlockSurface(src);
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419 SDL_UnlockSurface(dst);
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420 }
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15a18fbe6f21 * Known bugs added to the README
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421
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422 void DSurfaceBlitMultiply(Surface* src_o, const Rect& srcrect_o, Surface* dst_o, const Rect& dstrect_o) {
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423 SDL_Surface* dst = (SDL_Surface*)dst_o;
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424 SDL_Surface* src = (SDL_Surface*)src_o;
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425
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426 Rect srcrect(srcrect_o), dstrect(dstrect_o);
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427 clip_rect(srcrect, dstrect, dst);
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428
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429 SDL_LockSurface(dst);
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430 SDL_LockSurface(src);
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431 int dbpl = dst->pitch;
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432 int sbpl = src->pitch;
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433 int bpp = dst->format->BytesPerPixel;
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434 int width = srcrect.width();
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435 int height = srcrect.height();
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436 char* dmem = dst_o->mem(dstrect);
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437 char* smem = src_o->mem(srcrect);
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438
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439 SDL_PixelFormat& fmt = *dst->format;
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440 /* dst の 0-255 を 0-pixel に変換する(積算) */
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441 int i;
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442 int table1[256], table2[256], table3[256];
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443 Uint32 src_pixel = *(Uint32*)smem;
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444 src_pixel |= 0xff000000;
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445 int c1=src_pixel&255, c2=(src_pixel>>8)&255, c3=(src_pixel>>16)&255;
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446 for (i=0; i<256; i++) {
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447 int n = i + (i>>7);
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448 table1[i] = (c1*n)>>8;
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449 table2[i] = (c2*n)&0xff00;
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450 table3[i] = ((c3*n)<<8) & 0xff0000;
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451 }
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452 int err_count = 0;
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453 for (i=0; i<height; i++) {
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454 Uint32* d = (Uint32*)dmem;
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455 Uint32* s = (Uint32*)smem;
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456 int j; for (j=0; j<width; j++) {
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457 Uint32 dd = *d;
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458 Uint32 ss = *s;
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459 if (ss == src_pixel) {
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460 *(Uint32*)d = table1[ dd & 0xff] | table2[ (dd>>8) & 0xff] | table3[ (dd>>16) & 0xff];
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461 } else if ( ((ss^src_pixel) & 0xffffff) == 0) { // r,g,b of ss == src_pixel
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462 Uint32 as = ss>>ASHIFT;
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463 as += as>>7;
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464 ss = table1[ dd & 0xff] | table2[ (dd>>8) & 0xff] | table3[ (dd>>16) & 0xff];
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465 Uint32 s1 = ss&CMASK1;
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466 Uint32 d1 = dd&CMASK1;
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467 d1 = (d1 + (((s1-d1) * as) >> 8)) & CMASK1;
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468 ss &= CMASK2;
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469 dd &= CMASK2;
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470 dd = (dd + (((ss-dd) * as) >> 8)) & CMASK2;
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471 *(Uint32*)d = d1 | dd | 0xff000000;
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472 } else err_count++;
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473 d++; s++;
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474 }
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475 dmem += dbpl; smem += sbpl;
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476 }
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477 if (err_count) {
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478 fprintf(stderr,"multipy_blit : surface does not have unique color(%08x); %d pixels in width %d, height %d\n",
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479 src_pixel, err_count, width, height);
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480 }
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481 SDL_UnlockSurface(dst);
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482 SDL_UnlockSurface(src);
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483 }