1 | /* |
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2 | * Abuse - dark 2D side-scrolling platform game |
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3 | * Copyright (c) 1995 Crack dot Com |
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4 | * Copyright (c) 2005-2011 Sam Hocevar <sam@hocevar.net> |
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5 | * |
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6 | * This software was released into the Public Domain. As with most public |
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7 | * domain software, no warranty is made or implied by Crack dot Com or |
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8 | * Jonathan Clark. |
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9 | */ |
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10 | |
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11 | #include "config.h" |
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12 | |
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13 | #include <cstdio> |
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14 | #include <cstring> |
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15 | |
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16 | #include "common.h" |
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17 | |
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18 | #include "timage.h" |
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19 | |
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20 | TImage::TImage(image *im, char const *name) |
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21 | { |
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22 | m_size = im->Size(); |
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23 | |
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24 | im->Lock(); |
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25 | |
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26 | // First find out how much data to allocate |
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27 | size_t bytes = 0; |
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28 | for (int y = 0; y < m_size.y; y++) |
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29 | { |
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30 | uint8_t *parser = im->scan_line(y); |
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31 | for (int x = 0; x < m_size.x; ) |
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32 | { |
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33 | bytes++; |
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34 | while (x < m_size.x && *parser == 0) |
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35 | { |
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36 | parser++; x++; |
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37 | } |
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38 | |
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39 | if (x >= m_size.x) |
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40 | break; |
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41 | |
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42 | bytes++; // byte for the size of the run |
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43 | while (x < m_size.x && *parser != 0) |
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44 | { |
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45 | bytes++; |
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46 | x++; |
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47 | parser++; |
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48 | } |
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49 | } |
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50 | } |
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51 | |
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52 | uint8_t *parser = m_data = (uint8_t *)malloc(bytes); |
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53 | if (!parser) |
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54 | { |
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55 | printf("size = %d %d (%d bytes)\n", m_size.x, m_size.y, bytes); |
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56 | CONDITION(parser, "malloc error for TImage::m_data"); |
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57 | } |
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58 | |
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59 | // Now fill the RLE transparency image |
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60 | for (int y = 0; y < m_size.y; y++) |
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61 | { |
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62 | uint8_t *sl = im->scan_line(y); |
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63 | |
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64 | for (int x = 0; x < m_size.x; ) |
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65 | { |
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66 | uint8_t len = 0; |
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67 | while (x + len < m_size.x && sl[len] == 0) |
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68 | len++; |
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69 | |
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70 | *parser++ = len; |
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71 | x += len; |
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72 | sl += len; |
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73 | |
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74 | if (x >= m_size.x) |
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75 | break; |
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76 | |
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77 | len = 0; |
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78 | while (x + len < m_size.x && sl[len] != 0) |
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79 | { |
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80 | parser[len + 1] = sl[len]; |
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81 | len++; |
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82 | } |
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83 | |
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84 | *parser++ = len; |
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85 | parser += len; |
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86 | x += len; |
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87 | sl += len; |
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88 | } |
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89 | } |
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90 | im->Unlock(); |
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91 | } |
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92 | |
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93 | TImage::~TImage() |
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94 | { |
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95 | free(m_data); |
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96 | } |
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97 | |
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98 | image *TImage::ToImage() |
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99 | { |
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100 | image *im = new image(m_size); |
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101 | |
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102 | // FIXME: this is required until FILLED mode is fixed |
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103 | im->Lock(); |
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104 | memset(im->scan_line(0), 0, m_size.x * m_size.y); |
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105 | im->Unlock(); |
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106 | |
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107 | PutImage(im, vec2i(0)); |
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108 | return im; |
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109 | } |
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110 | |
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111 | uint8_t *TImage::ClipToLine(image *screen, vec2i pos1, vec2i pos2, |
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112 | vec2i &pos, int &ysteps) |
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113 | { |
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114 | // check to see if it is totally clipped out first |
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115 | if (pos.y + m_size.y <= pos1.y || pos.y >= pos2.y |
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116 | || pos.x >= pos2.x || pos.x + m_size.x <= pos1.x) |
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117 | return NULL; |
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118 | |
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119 | uint8_t *parser = m_data; |
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120 | |
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121 | // Number of lines to skip, number of lines to draw, first line to draw |
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122 | int skiplines = Max(pos1.y - pos.y, 0); |
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123 | ysteps = Min(pos2.y - pos.y, m_size.y - skiplines); |
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124 | pos.y += skiplines; |
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125 | |
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126 | while (skiplines--) |
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127 | { |
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128 | for (int ix = 0; ix < m_size.x; ) |
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129 | { |
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130 | ix += *parser++; // skip over empty space |
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131 | |
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132 | if (ix >= m_size.x) |
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133 | break; |
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134 | |
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135 | ix += *parser; |
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136 | parser += *parser + 1; // skip over data |
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137 | } |
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138 | } |
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139 | |
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140 | screen->AddDirty(Max(pos.x, pos1.x), pos.y, |
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141 | Min(pos.x + m_size.x, pos2.x), pos.y + m_size.y); |
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142 | return parser; |
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143 | } |
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144 | |
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145 | template<int N> |
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146 | void TImage::PutImageGeneric(image *screen, vec2i pos, uint8_t color, |
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147 | image *blend, vec2i bpos, uint8_t *map, |
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148 | uint8_t *map2, int amount, int total_frames, |
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149 | uint8_t *tint, color_filter *f, palette *pal) |
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150 | { |
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151 | vec2i pos1, pos2; |
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152 | int ysteps, mul = 0; |
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153 | |
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154 | screen->GetClip(pos1.x, pos1.y, pos2.x, pos2.y); |
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155 | |
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156 | if (N == SCANLINE) |
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157 | { |
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158 | pos1.y = Max(pos1.y, pos.y + amount); |
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159 | pos2.y = Min(pos2.y, pos.y + amount + 1); |
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160 | if (pos1.y >= pos2.y) |
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161 | return; |
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162 | } |
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163 | |
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164 | uint8_t *datap = ClipToLine(screen, pos1, pos2, pos, ysteps), |
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165 | *screen_line, *blend_line = NULL, *paddr = NULL; |
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166 | if (!datap) |
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167 | return; // if ClipToLine says nothing to draw, return |
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168 | |
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169 | CONDITION(N == BLEND && pos.y >= bpos.y |
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170 | && pos.y + ysteps < bpos.y + blend->Size().y + 1, |
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171 | "Blend doesn't fit on TImage"); |
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172 | |
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173 | if (N == FADE || N == FADE_TINT || N == BLEND) |
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174 | paddr = (uint8_t *)pal->addr(); |
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175 | |
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176 | if (N == FADE || N == FADE_TINT) |
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177 | mul = (amount << 16) / total_frames; |
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178 | else if (N == BLEND) |
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179 | mul = ((16 - amount) << 16 / 16); |
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180 | |
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181 | if (N == PREDATOR) |
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182 | ysteps = Min(ysteps, pos2.y - 1 - pos.y - 2); |
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183 | |
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184 | screen->Lock(); |
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185 | |
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186 | screen_line = screen->scan_line(pos.y) + pos.x; |
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187 | int sw = screen->Size().x; |
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188 | pos1.x -= pos.x; pos2.x -= pos.x; |
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189 | |
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190 | for (; ysteps > 0; ysteps--, pos.y++) |
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191 | { |
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192 | if (N == BLEND) |
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193 | blend_line = blend->scan_line(pos.y - bpos.y); |
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194 | |
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195 | for (int ix = 0; ix < m_size.x; ) |
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196 | { |
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197 | // Handle a run of transparent pixels |
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198 | int todo = *datap++; |
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199 | |
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200 | // FIXME: implement FILLED mode |
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201 | ix += todo; |
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202 | screen_line += todo; |
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203 | |
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204 | if (ix >= m_size.x) |
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205 | break; |
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206 | |
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207 | // Handle a run of solid pixels |
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208 | todo = *datap++; |
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209 | |
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210 | // Chop left side if necessary, but no more than todo |
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211 | int tochop = Min(todo, Max(pos1.x - ix, 0)); |
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212 | |
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213 | ix += tochop; |
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214 | screen_line += tochop; |
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215 | datap += tochop; |
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216 | todo -= tochop; |
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217 | |
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218 | // Chop right side if necessary and process the remaining pixels |
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219 | int count = Min(todo, Max(pos2.x - ix, 0)); |
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220 | |
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221 | if (N == NORMAL || N == SCANLINE) |
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222 | { |
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223 | memcpy(screen_line, datap, count); |
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224 | } |
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225 | else if (N == COLOR) |
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226 | { |
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227 | memset(screen_line, color, count); |
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228 | } |
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229 | else if (N == PREDATOR) |
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230 | { |
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231 | memcpy(screen_line, screen_line + 2 * m_size.x, count); |
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232 | } |
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233 | else if (N == REMAP) |
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234 | { |
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235 | uint8_t *sl = screen_line, *sl2 = datap; |
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236 | while (count--) |
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237 | *sl++ = map[*sl2++]; |
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238 | } |
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239 | else if (N == REMAP2) |
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240 | { |
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241 | uint8_t *sl = screen_line, *sl2 = datap; |
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242 | while (count--) |
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243 | *sl++ = map2[map[*sl2++]]; |
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244 | } |
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245 | else if (N == FADE || N == FADE_TINT || N == BLEND) |
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246 | { |
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247 | uint8_t *sl = screen_line; |
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248 | uint8_t *sl2 = (N == BLEND) ? blend_line + pos.x + ix - bpos.x |
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249 | : sl; |
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250 | uint8_t *sl3 = datap; |
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251 | |
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252 | while (count--) |
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253 | { |
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254 | uint8_t *p1 = paddr + 3 * *sl2++; |
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255 | uint8_t *p2 = paddr + 3 * (N == FADE_TINT ? tint[*sl3++] |
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256 | : *sl3++); |
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257 | |
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258 | uint8_t r = ((((int)p1[0] - p2[0]) * mul) >> 16) + p2[0]; |
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259 | uint8_t g = ((((int)p1[1] - p2[1]) * mul) >> 16) + p2[1]; |
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260 | uint8_t b = ((((int)p1[2] - p2[2]) * mul) >> 16) + p2[2]; |
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261 | |
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262 | *sl++ = f->lookup_color(r >> 3, g >> 3, b >> 3); |
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263 | } |
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264 | } |
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265 | |
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266 | datap += todo; |
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267 | ix += todo; |
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268 | screen_line += todo; |
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269 | } |
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270 | screen_line += sw - m_size.x; |
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271 | } |
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272 | screen->Unlock(); |
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273 | } |
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274 | |
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275 | void TImage::PutImage(image *screen, vec2i pos) |
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276 | { |
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277 | PutImageGeneric<NORMAL>(screen, pos, 0, NULL, 0, NULL, NULL, |
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278 | 0, 1, NULL, NULL, NULL); |
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279 | } |
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280 | |
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281 | void TImage::PutRemap(image *screen, vec2i pos, uint8_t *map) |
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282 | { |
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283 | PutImageGeneric<REMAP>(screen, pos, 0, NULL, 0, map, NULL, |
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284 | 0, 1, NULL, NULL, NULL); |
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285 | } |
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286 | |
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287 | void TImage::PutDoubleRemap(image *screen, vec2i pos, |
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288 | uint8_t *map, uint8_t *map2) |
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289 | { |
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290 | PutImageGeneric<REMAP2>(screen, pos, 0, NULL, 0, map, map2, |
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291 | 0, 1, NULL, NULL, NULL); |
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292 | } |
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293 | |
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294 | // Used when eg. the player teleports, or in rocket trails |
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295 | void TImage::PutFade(image *screen, vec2i pos, int amount, int total_frames, |
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296 | color_filter *f, palette *pal) |
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297 | { |
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298 | PutImageGeneric<FADE>(screen, pos, 0, NULL, 0, NULL, NULL, |
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299 | amount, total_frames, NULL, f, pal); |
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300 | } |
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301 | |
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302 | void TImage::PutFadeTint(image *screen, vec2i pos, int amount, int total_frames, |
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303 | uint8_t *tint, color_filter *f, palette *pal) |
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304 | { |
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305 | PutImageGeneric<FADE_TINT>(screen, pos, 0, NULL, 0, NULL, NULL, |
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306 | amount, total_frames, tint, f, pal); |
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307 | } |
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308 | |
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309 | void TImage::PutColor(image *screen, vec2i pos, uint8_t color) |
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310 | { |
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311 | PutImageGeneric<COLOR>(screen, pos, color, NULL, 0, NULL, NULL, |
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312 | 0, 1, NULL, NULL, NULL); |
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313 | } |
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314 | |
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315 | // This method is unused but is believed to work. |
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316 | // Assumes that the blend image completely covers the transparent image. |
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317 | void TImage::PutBlend(image *screen, vec2i pos, image *blend, vec2i bpos, |
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318 | int amount, color_filter *f, palette *pal) |
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319 | { |
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320 | PutImageGeneric<BLEND>(screen, pos, 0, blend, bpos, NULL, NULL, |
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321 | amount, 1, NULL, f, pal); |
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322 | } |
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323 | |
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324 | void TImage::PutFilled(image *screen, vec2i pos, uint8_t color) |
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325 | { |
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326 | PutImageGeneric<FILLED>(screen, pos, color, NULL, 0, NULL, NULL, |
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327 | 0, 1, NULL, NULL, NULL); |
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328 | } |
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329 | |
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330 | void TImage::PutPredator(image *screen, vec2i pos) |
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331 | { |
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332 | PutImageGeneric<PREDATOR>(screen, pos, 0, NULL, 0, NULL, NULL, |
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333 | 0, 1, NULL, NULL, NULL); |
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334 | } |
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335 | |
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336 | void TImage::PutScanLine(image *screen, vec2i pos, int line) |
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337 | { |
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338 | PutImageGeneric<SCANLINE>(screen, pos, 0, NULL, 0, NULL, NULL, |
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339 | line, 1, NULL, NULL, NULL); |
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340 | } |
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341 | |
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342 | size_t TImage::MemUsage() |
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343 | { |
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344 | uint8_t *d = m_data; |
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345 | size_t ret = 0; |
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346 | |
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347 | for (int y = 0; y < m_size.y; y++) |
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348 | { |
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349 | for (int x = 0; x < m_size.x; x++) |
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350 | { |
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351 | x += *d++; ret++; |
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352 | |
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353 | if (x >= m_size.x) |
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354 | break; |
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355 | |
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356 | size_t run = *d++; ret += run + 1; d += run; x += run; |
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357 | } |
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358 | } |
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359 | return ret + sizeof(void *) + sizeof(vec2i); |
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360 | } |
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361 | |
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