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109
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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 "SpanPack.h"
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6 #include "texture.h"
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7 #include "viewer_types.h"
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8
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9 #define SPAN_PACK_LOAD 0
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10
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11 SchedDefineTask(DrawSpan);
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12
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13 void
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14 DrawSpan::linebuf_init(int *buf, int x, int rgb)
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15 {
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16 for (int i = 0; i < x; i++) {
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17 buf[i] = rgb;
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18 }
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19 }
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20
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21 float*
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22 DrawSpan::zRow_init(int w, int h)
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23 {
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24 float *zRow = NULL;
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25 float z = 65535.0f;
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26 int length = w*h;
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27
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28 zRow = (float*)smanager->allocate(sizeof(float)*length);
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29
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30 for (int i = 0; i < length; i++) {
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31 zRow[i] = z;
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32 }
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33
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34 return zRow;
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35 }
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36
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37
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38 char*
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39 DrawSpan::get_pixel(int tx, int ty, void *texture_image)
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40 {
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41 return (char*)texture_image+(3*((128)*ty+tx));
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42 }
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43
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44 Uint32
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45 DrawSpan::get_rgb(int tx, int ty, void *texture)
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46 {
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47 Uint8 red, green, blue, alpha;
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48
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49 if (tx<0) tx = 0;
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50 if (128-1< tx) tx = 128-1 ;
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51 if (ty<0) ty = 0;
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52 if (128-1< ty) ty = 128-1 ;
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53
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54 char *p = get_pixel(tx,ty,texture);
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55
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56 blue = (Uint8) p[0];
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57 green = (Uint8) p[1];
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58 red = (Uint8) p[2];
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59 alpha = 255;
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60
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61 return (red & 0xff) * 0x10000 + (green & 0xff) * 0x100
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62 + (blue & 0xff) + (alpha << 24);
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63 }
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64
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65 int
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66 DrawSpan::run(void *rbuf, void *wbuf)
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67 {
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68 SpanPack *sp = (SpanPack*)smanager->get_input(0);
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69 SpanPack *next_sp =
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70 (SpanPack*)smanager->allocate(sizeof(SpanPack));
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71 SpanPack *free_sp = next_sp; // next_sp の free() 用
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72 SpanPack *tmp_sp = NULL;
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73 Span *span;
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74
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75 int render_y = sp->info.y_top;
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76 void *texture_image = global_get(TEXTURE_ID);
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77
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78 int rangex_start = get_param(0); // このタスクが担当する x の範囲の始点
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79 int rangex_end = get_param(1); // 終点 (start <= x <= end)
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80 int rangey = get_param(2); // y の範囲 (render_y + rangey - 1)
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81 int rangex = rangex_end - rangex_start + 1;
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82
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83 float *zRow = zRow_init(rangex, rangey);
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84
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85 int **linebuf = (int**)smanager->allocate(sizeof(int*)*rangey);
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86
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87 for (int i = 0; i < rangey; i++) {
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88 linebuf[i] = (int*)smanager->get_output(i);
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89 linebuf_init(linebuf[i], rangex, 0x00ff00ff);
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90 }
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91
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92 do {
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93 /**
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94 * SpanPack->next が存在する場合、
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95 * 現在の SpanPack を処理してる間に
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96 * 次の SpanPack の DMA 転送を行う
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97 */
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98 if (sp->next != NULL) {
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99 smanager->dma_load(next_sp, (uint32)sp->next,
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100 sizeof(SpanPack), SPAN_PACK_LOAD);
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101 } else {
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102 next_sp = NULL;
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103 }
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104
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105 for (int t = 0; t < sp->info.size; t++) {
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106 span = &sp->span[t];
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107
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108 int end = span->length_x;
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109 Uint32 rgb = 0x00ff00;
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110 float tex1 = span->tex_x1;
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111 float tex2 = span->tex_x2;
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112 float tey1 = span->tex_y1;
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113 float tey2 = span->tex_y2;
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114 int tex_xpos;
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115 int tex_ypos;
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116 int tex_zpos;
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117 int x = span->x;
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118 int y = span->y;
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119 float z = span->start_z;
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120 float zpos = span->end_z;
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121
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122 // 座標が [0 .. split_screen_w-1] に入るように x,y を -1
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123 int localx = getLocalX(x-1);
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124 int localy = getLocalY(y-1);
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125
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126 if (end == 1) {
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127 if (x < rangex_start || rangex_end < x) {
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128 continue;
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129 }
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130
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131 tex_xpos = (int)((span->tex_height-1) * tex1);
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132 tex_ypos = (int)((span->tex_width-1) * tey1);
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133 tex_zpos = (int)z;
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134
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135 if (zpos < zRow[localx + (rangex * localy)]) {
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136 rgb = get_rgb(tex_xpos, tex_ypos, texture_image);
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137 zRow[localx + (rangex * localy)] = zpos;
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138 linebuf[localy][localx] = rgb;
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139 }
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140 } else {
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141 float tex_x, tex_y, tex_z;
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142 int js = (x < rangex_start) ? rangex_start - x : 0;
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143 int je = (x + end > rangex_end) ? rangex_end - x : end;
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144
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145 for (int j = js; j <= je; j++) {
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146 localx = getLocalX(x-1+j);
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147
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148 tex_x = tex1*(end-1-j)/(end-1) + tex2*j/(end-1);
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149 tex_y = tey1*(end-1-j)/(end-1) + tey2*j/(end-1);
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150 tex_z = z*(end-1-j)/(end-1) + zpos*j/(end-1);
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151 if (tex_x > 1) tex_x = 1;
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152 if (tex_y > 1) tex_y = 1;
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153 tex_xpos = (int)((span->tex_height-1) * tex_x);
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154 tex_ypos = (int)((span->tex_width-1) * tex_y);
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155
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156 if (tex_z < zRow[localx + (rangex*localy)]) {
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157 rgb = get_rgb(tex_xpos, tex_ypos, texture_image);
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158 zRow[localx + (rangex*localy)] = tex_z;
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159 linebuf[localy][localx] = rgb;
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160 }
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161 }
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162 }
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163 }
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164
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165 smanager->dma_wait(SPAN_PACK_LOAD);
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166
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167 tmp_sp = sp;
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168 sp = next_sp;
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169 next_sp = tmp_sp;
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170 } while (sp);
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171
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172
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173 FINISH:
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174 free(free_sp);
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175 free(linebuf);
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176 free(zRow);
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177
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178 return 0;
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179 }
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