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1 #include <stdlib.h>
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2 #include <string.h>
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3 #include "DrawSpan.h"
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4 #include "polygon_pack.h"
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5 #include "texture.h"
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6 #include "viewer_types.h"
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7 #include "Func.h"
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8 #include "sys.h"
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9 #include "global_alloc.h"
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10
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11 SchedDefineTask(DrawSpan);
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12 SchedDefineTask1(DrawSpanEnd,draw_span_end);
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13
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14 #define TEX_LOAD1 0
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15 #define TEX_LOAD2 1
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16 #define SPAN_PACK_LOAD 2
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17 #define FB_STORE 3
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18
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19 static int
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20 draw_span_end(SchedTask *s, void *rbuf, void *wbuf)
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21 {
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22 Gptr g = (Gptr)s->get_param(0);
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23 s->dma_wait(FB_STORE);
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24 free((void*)((int)g->linebuf*g->doneWrite));
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25 free(g);
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26 return 0;
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27 }
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28
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29 /**
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30 * テクスチャは、TEXTURE_SPLIT_PIXEL^2 のブロックに分割する
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31 *
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32 * +---+---+---+---+---+---+
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33 * | 0 | 1 | 2 | 3 | 4 | 5 |
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34 * +---+---+---+---+---+---+
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35 * | | | | | |11 |
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36 * +---+---+---+---+---+---+
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37 * | | | | | |17 |
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38 * +---+---+---+---+---+---+
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39 * | | | | | |23 |
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40 * +---+---+---+---+---+---+
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41 * | | | | | |29 |
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42 * +---+---+---+---+---+---+
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43 * | | | | | |35 |
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44 * +---+---+---+---+---+---+
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45 *
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46 * 一辺を TEXTURE_SPLIT とする
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47 * 各ブロックの数字がブロックIDとなる。
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48 */
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49
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50 /**
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51 * テクスチャの座標から、
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52 * テクスチャのどのブロックかを求める
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53 *
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54 * @param[in] tx X coordinates of texture
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55 * @param[in] tx Y coordinates of texture
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56 * @param[in] twidth Width of texture
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57 * @return block ID
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58 */
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59 static int
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60 getTexBlock(int tx, int ty, int twidth)
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61 {
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62 int blockX, blockY;
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63
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64 blockX = tx / TEXTURE_SPLIT_PIXEL;
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65 blockY = ty / TEXTURE_SPLIT_PIXEL;
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66
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67 return blockX + (twidth/TEXTURE_SPLIT_PIXEL)*blockY;
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68 }
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69
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70 /**
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71 * block ID と、テクスチャの TOP address から
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72 * (tx,ty) で使われるテクスチャの Tile addres を求める
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73 *
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74 * @param[in] tx X coordinates of texture
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75 * @param[in] tx Y coordinates of texture
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76 * @param[in] tw Width of texture
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77 * @param[in] tex_addr_top (tx,ty) で使うテクスチャの先頭address
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78 * @return block ID
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79 */
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80 static memaddr
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81 getTile(int tx, int ty, int tw, memaddr tex_addr_top)
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82 {
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83 int block = getTexBlock(tx, ty, tw);
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84 return tex_addr_top + block * TEXTURE_BLOCK_SIZE * sizeof(uint32);
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85 }
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86
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87 /**
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88 * FrameBuffer に書き込む rgb の領域初期化
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89 *
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90 * @param width Width of Buffer
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91 * @param height Height of Buffer
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92 * @param rgb Initial value of RGB at Buffer
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93 * @return Buffer
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94 */
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95 static int*
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96 linebuf_init(SchedTask *smanager, int width, int height, int rgb)
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97 {
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98 int *buf = (int*)smanager->allocate(sizeof(int)*width*height);
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99
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100 for (int i = 0; i < width*height; i++) {
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101 buf[i] = rgb;
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102 }
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103
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104 return buf;
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105 }
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106
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107 /**
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108 * Z-Buffer の初期化
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109 *
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110 * @param width Width of Z-Buffer
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111 * @param height Height of Z-Buffer
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112 * @return Z-Buffer
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113 */
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114 static float*
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115 zRow_init(SchedTask *smanager, int width, int height)
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116 {
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117 float *buf = (float*)smanager->allocate(sizeof(float)*width*height);
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118 float def = 65535.0f;
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119
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120 for (int i = 0; i < width*height; i++) {
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121 buf[i] = def;
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122 }
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123
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124 return buf;
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125 }
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126
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127
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128 static uint32
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129 get_rgb(int tx, int ty, TilePtr tile)
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130 {
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131 uint32 *data = (uint32 *)tile->data;
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132 return data[(TEXTURE_SPLIT_PIXEL)*ty+tx];
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133 }
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134
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135
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136 static void
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137 writebuffer(SchedTask *smanager, Gptr g, unsigned int display,
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138 int buf_width, int height, int screen_width)
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139 {
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140 for (int i = 0; i < height; i++) {
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141 smanager->dma_store(&g->linebuf[i*buf_width],
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142 display + (sizeof(int)*screen_width*i),
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143 sizeof(int)*buf_width, FB_STORE);
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144 }
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145
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146 g->doneWrite = 1;
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147 }
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148
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149 /**
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150 * zRow と Linebuf を更新する
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151 *
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152 * @param zpos 更新する pixel のZ座標
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153 * @param rangex このタスクが処理する描画領域の x の長さ
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154 * @param x pixel の、描画領域内での x 座標
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155 * @param y 〃 の、y 座標
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156 * @param tex_x pixel が使用するテクスチャの、Tile (8x8) 内での x 座標
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157 * @param tex_y 〃 の y 座標
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158 * @param tex_addr テクスチャのアドレス(MainMemory)
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159 */
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160 static void
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161 updateBuffer(Gptr g, float zpos, int rangex, int x, int y, int tex_x, int tex_y,
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162 float normal_x, float normal_y, float normal_z, TilePtr tile)
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163 {
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164
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165 int color = get_rgb(tex_x, tex_y, tile);
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166 /*下位4bitを抽出*/
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167 int alpha = color & 0x000F;
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168 /*完全に透けているか判断*/
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169 int flag = (alpha != 0);
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170
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171 color = infinity_light_calc(color,normal_x,normal_y,normal_z);
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172
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173 g->zRow[x + (rangex*y)] = zpos*flag + g->zRow[x + (rangex*y)]*(1-flag);
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174 g->linebuf[x + (rangex*y)] = color*flag + g->linebuf[x + (rangex*y)]*(1-flag);
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175
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176 }
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177
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178 /**
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179 * 長さが 1 の Span の描画 (要するに 1 pixel)
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180 *
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181 * @param span Span
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182 * @param startx 描画開始範囲
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183 * @param endx 描画終了範囲
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184 */
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185 static int
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186 drawDot1(SchedTask *smanager, Gptr g, SpanPtr span, int startx, int endx, int wait_tag)
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187 {
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188 int rangex = endx - startx + 1;
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189
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190 float normal_x = span->normal_x;
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191 float normal_y = span->normal_y;
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192 float normal_z = span->normal_z;
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193
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194
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195 /* span->x に対応する Texture の座標 (tex_xpos, tex_ypos) */
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196 int tex_xpos, tex_ypos;
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197
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198 // span の始点に対応する Texture の座標 (tex1, tey1)
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199 float tex = span->tex_x1;
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200 float tey = span->tex_y1;
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201
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202 // span の始点に対応する z 座標
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203 float zpos = span->start_z;
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204
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205 /* Tile 内での座標 */
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206 int localx = getLocalX(span->x-1);
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207 int localy = getLocalY(span->y-1);
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208
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209 /**
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210 * (tex_xpos, tex_ypos) の、Tile 内(上の図参照)での座標と
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211 * そのブロックのアドレス(MainMemory)
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212 */
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213 int tex_localx;
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214 int tex_localy;
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215 memaddr tex_addr;
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216
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217 if (span->x < startx || endx < span->x) {
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218 return -1;
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219 }
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220
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221 tex_xpos = (int)((span->tex_width-1) * tex);
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222 tex_ypos = (int)((span->tex_height-1) * tey);
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223
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224 if (zpos < g->zRow[localx + (rangex*localy)]) {
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225 tex_addr = getTile(tex_xpos, tex_ypos,
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226 span->tex_width, (memaddr)span->tex_addr);
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227 tex_localx = tex_xpos % TEXTURE_SPLIT_PIXEL;
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228 tex_localy = tex_ypos % TEXTURE_SPLIT_PIXEL;
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229
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230 TilePtr tile = smanager->get_segment(tex_addr,g->tileList);
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231 smanager->wait_segment(tile);
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232
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233 updateBuffer(g, zpos, rangex, localx, localy,
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234 tex_localx, tex_localy,
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235 normal_x,normal_y,normal_z,tile);
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236 }
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237
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238 return -1;
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239 }
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240
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241 #if 0
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242 static void
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243 drawDot2(SchedTask *smanager, SpanPtr span, int startx, int end, int js, int wait_tag)
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244 {
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245 //printf("%d\n", js);
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246 }
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247 #endif
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248
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249 /**
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250 * 長さが 1 より大きい Span の描画
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251 *
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252 * 本来の目的として、この関数(drawLine1) では
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253 * : 既に SPE 上に Tile のある pixel だけ描画
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254 * : それ以外は、ここで予め DMA load しておき、
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255 * : drawLine2 で一気に描画する
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256 * ってものだったんだけど、どうも上手く行かなかったので
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257 * 今は drawLine1 で load -> wait -> rendering を全部やってます
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258 * (rendering といっても、rendering buffer に書き込むだけで
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259 * まだ main memory (frame buffer) に dma store してるわけではない)
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260 *
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261 * @param span Span
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262 * @param startx 描画開始範囲
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263 * @param endx 描画終了範囲
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264 * @return 「span のどの位置まで rendering が終わったか」の x 座標
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265 */
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266 static int
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267 drawLine1(SchedTask *smanager, Gptr g, SpanPtr span, int startx, int endx, int wait_tag)
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268 {
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269 int x = span->x;
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270 int rangex = endx - startx + 1;
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271 int x_len = span->length_x;
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272
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273 float normal_x = span->normal_x;
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274 float normal_y = span->normal_y;
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275 float normal_z = span->normal_z;
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276
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277
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278 int js = (x < startx) ? startx - x : 0;
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279 int je = (x + x_len > endx) ? endx - x : x_len;
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280
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281 /* span->x に対応する Texture の座標 (tex_xpos, tex_ypos) */
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282 int tex_xpos, tex_ypos;
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283
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284 // span の始点に対応する座標 (tex1, tey1)
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285 float tex1 = span->tex_x1;
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286 float tey1 = span->tex_y1;
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287
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288 // span の終点に対応する座標 (tex2, tey2)
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289 float tex2 = span->tex_x2;
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290 float tey2 = span->tex_y2;
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291
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292 // span の始点、終点に対応する z 座標
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293 float zpos1 = span->start_z;
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294 float zpos2 = span->end_z;
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295
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296 // Tile 内での座標
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297 int localx, localy = getLocalY(span->y-1);
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298
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299 int ret = je+1;
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300
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301 //for (int j = js; j <= je; j++) {
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302 for (int j = je; j >= js; j--) {
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303 float tex_x, tex_y, tex_z;
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304
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305 localx = getLocalX(x-1+j);
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306
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307 tex_z = zpos1*(x_len-1-j)/(x_len-1) + zpos2*j/(x_len-1);
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308
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309 tex_x = tex1*(x_len-1-j)/(x_len-1) + tex2*j/(x_len-1);
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310 tex_y = tey1*(x_len-1-j)/(x_len-1) + tey2*j/(x_len-1);
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311 if (tex_x > 1) tex_x = 1;
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312 if (tex_x < 0) tex_x = 0;
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313 if (tex_y > 1) tex_y = 1;
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314 if (tex_y < 0) tex_y = 0;
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315 tex_xpos = (int)((span->tex_width-1) * tex_x);
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316 tex_ypos = (int)((span->tex_height-1) * tex_y);
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317
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318 if (tex_z < g->zRow[localx + (rangex*localy)]) {
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319 // (tex_xpos, tex_ypos) の、Tile 内(上の図参照)での座標と
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320 // そのブロックのアドレス(MainMemory)
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321 memaddr tex_addr;
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322 int tex_localx;
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323 int tex_localy;
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324
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325 tex_addr = getTile(tex_xpos, tex_ypos,
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326 span->tex_width, (memaddr)span->tex_addr);
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327 tex_localx = tex_xpos % TEXTURE_SPLIT_PIXEL;
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328 tex_localy = tex_ypos % TEXTURE_SPLIT_PIXEL;
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329 TilePtr tile = smanager->get_segment(tex_addr,g->tileList);
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330 smanager->wait_segment(tile);
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331
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332 updateBuffer(g, tex_z, rangex, localx, localy,
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333 tex_localx, tex_localy,
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334 normal_x, normal_y, normal_z, tile);
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335 }
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336 }
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337
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338 return ret;
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339 }
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340
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341 static int
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342 infinity_light_calc(int color,float normal_x, float normal_y, float normal_z)
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343 {
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344 unsigned char rgb[4];
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345 int light_rgb;
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346 int flag;
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347 float normal_vector[4] = {normal_x,normal_y,normal_z,0};
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348 // 光のベクトル,きめうちしちゃった。どうにかする
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349 float light_vector[4] = {0,0,-1,0};
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350 float inner_product;
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351
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352 // 引数で受け取った color の rgb 情報の抜き出し
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353 rgb[0] = (color & 0xff000000) >> 24;
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354 rgb[1] = (color & 0x00ff0000) >> 16;
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355 rgb[2] = (color & 0x0000ff00) >> 8;
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356 rgb[3] = (color & 0x000000ff);
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357
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358 // 法線ベクトルと光源ベクトルとの内積をとる
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359 inner_product = innerProduct(normal_vector,light_vector);
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360 // 内積がマイナスの場合は色がない。
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361 flag = (inner_product > 0);
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362
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363 // 内積を rgb にかけていく
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364 rgb[0] = (unsigned char)(rgb[0]*inner_product*flag);
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365 rgb[1] = (unsigned char)(rgb[1]*inner_product*flag);
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366 rgb[2] = (unsigned char)(rgb[2]*inner_product*flag);
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367
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368 //計算した rgb を light_rgb にまとめる。
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369 light_rgb = (rgb[0] << 24) + (rgb[1] << 16) + (rgb[2] << 8) + (rgb[3]);
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370
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371 return light_rgb;
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372 }
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373
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374
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375 static int
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376 run(SchedTask *smanager, void *rbuf, void *wbuf)
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377 {
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378 Gptr g = (Gptr)smanager->allocate(sizeof(G));
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379
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380 SpanPackPtr spack = (SpanPackPtr)smanager->get_input(0);
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381 SpanPackPtr next_spack = (SpanPackPtr)smanager->allocate(sizeof(SpanPack));
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382 SpanPackPtr free_spack = next_spack; // next_spack の free() 用
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383 Span *span;
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384
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385 Span nop_span;
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386 nop_span.length_x = 1;
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387
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388 int (*drawFunc1[2])(SchedTask *, Gptr, SpanPtr, int, int, int) = {
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389 &drawDot1, &drawLine1
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390 };
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391
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392 uint32 display = smanager->get_param(0);
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393 int screen_width = smanager->get_param(1);
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394 int rangex_start = smanager->get_param(2);
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395 int rangex_end = smanager->get_param(3);
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396
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397 // このタスクが担当する x の範囲
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398 int rangex = rangex_end - rangex_start + 1;
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399
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400 // y の範囲
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401 int rangey = smanager->get_param(4);
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402 g->tileList = (TileListPtr)smanager->global_get(GLOBAL_TILE_LIST);
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403
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404 g->zRow = zRow_init(smanager, rangex, rangey);
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405 //linebuf = linebuf_init(rangex, rangey, 0x00ffffff);
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406 g->linebuf = linebuf_init(smanager, rangex, rangey, 0);
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407
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408 g->doneWrite = 0;
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409
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410 int tl_tag[2] = {TEX_LOAD1, TEX_LOAD2};
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411 int tl_tag_flg1 = 0;
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412 int tl_tag_flg2 = 1;
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413
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414 do {
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415 /**
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416 * SpanPack->next が存在する場合、
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417 * 現在の SpanPack を処理してる間に
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418 * 次の SpanPack の DMA 転送を行う
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419 */
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420 if (spack->next != NULL) {
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421 smanager->dma_load(next_spack, (uint32)spack->next,
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422 sizeof(SpanPack), SPAN_PACK_LOAD);
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423 } else {
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424 next_spack = NULL;
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425 }
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426
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427 SpanPtr resume_span = &nop_span;
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428 int resume_span_x = 0;
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429
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430 for (int t = 0; t < spack->info.size; t++) {
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431 SpanPtr next_span;
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432 int next_span_x;
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433
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434 span = &spack->span[t];
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435
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436 /**
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437 * span の長さによって、drawLine か drawDot を選択している
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438 */
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439 next_span_x
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440 = (*drawFunc1[(span->length_x != 1)])(
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441 smanager, g,
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442 span, rangex_start, rangex_end, tl_tag[tl_tag_flg1]);
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443 next_span = span;
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444
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445 resume_span = next_span;
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446 resume_span_x = next_span_x;
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447
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448 //smanager->dma_wait(tl_tag[tl_tag_flg1]);
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449
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450 tl_tag_flg1 ^= 1;
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451 tl_tag_flg2 ^= 1;
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452 }
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453
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454 // 現在 drawLine2、drawDot2 は機能してないので
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455 //(this->*drawFunc2[(resume_span->length_x != 1)])(
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456 //resume_span, rangex_start, rangex_end, resume_span_x,
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457 //tl_tag[tl_tag_flg1]);
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458
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459 smanager->dma_wait(SPAN_PACK_LOAD);
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460
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461 SpanPackPtr tmp_spack = spack;
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462 spack = next_spack;
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463 next_spack = tmp_spack;
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464 } while (spack);
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465
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466 writebuffer(smanager, g, display, rangex, rangey, screen_width);
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467
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468 // linebuf は、writebuffer() の dma_store を wait する
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469 // DrawSpan::~DrawSpan() 内で free する。
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470 //free(linebuf);
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471 free(g->zRow);
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472
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473 //FINISH:
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474 /**
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475 * goto FINISH; の時は reboot なので
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476 * linebuf, zRow は free() しない
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477 */
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478
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479 free(free_spack);
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480
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481 TaskPtr nextTask = smanager->create_task(TASK_DRAW_SPAN_END);
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482 nextTask->add_param((int)g);
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483 smanager->wait_task(nextTask);
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484
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485 return 0;
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486 }
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487
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488 /* end */
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