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annotate src/radialblur.cpp @ 0:5019d031b485

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initial commit
author John Tsiombikas <nuclear@member.fsf.org>
date Wed, 05 Jun 2013 22:33:37 +0300
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nuclear@0 1 #include <math.h>
nuclear@0 2
nuclear@0 3 #include "main.h"
nuclear@0 4 #include "sky1.h"
nuclear@0 5
nuclear@0 6 unsigned char rbmp[ScreenSize];
nuclear@0 7 unsigned char gbmp[ScreenSize];
nuclear@0 8 unsigned char bbmp[ScreenSize];
nuclear@0 9
nuclear@0 10 unsigned char rbuffer[ScreenSize];
nuclear@0 11 unsigned char gbuffer[ScreenSize];
nuclear@0 12 unsigned char bbuffer[ScreenSize];
nuclear@0 13
nuclear@0 14 short radir0[ScreenSize];
nuclear@0 15 short radir1[ScreenSize];
nuclear@0 16 short radir2[ScreenSize];
nuclear@0 17
nuclear@0 18 short radir3[ScreenSize];
nuclear@0 19 short radir4[ScreenSize];
nuclear@0 20 short radir5[ScreenSize];
nuclear@0 21
nuclear@0 22 void InitRadialBitmap1()
nuclear@0 23 {
nuclear@0 24 int x, y, i = 0;
nuclear@0 25 unsigned short c;
nuclear@0 26 for (y=0; y<ScreenHeight; y++)
nuclear@0 27 {
nuclear@0 28 for (x=0; x<ScreenWidth; x ++)
nuclear@0 29 {
nuclear@0 30 c = sky1[(x&255) + (((ScreenHeight-1)-y)<<8)];
nuclear@0 31 rbmp[i] = ((c>>11) & 31) << 3;
nuclear@0 32 gbmp[i] = ((c>>5) & 63) << 2;
nuclear@0 33 bbmp[i] = (c & 31) << 3;
nuclear@0 34 i++;
nuclear@0 35 }
nuclear@0 36 }
nuclear@0 37 }
nuclear@0 38
nuclear@0 39 void InitRadialblur()
nuclear@0 40 {
nuclear@0 41 InitRadialBitmap1();
nuclear@0 42
nuclear@0 43 float rb_shortness = 4.0f;
nuclear@0 44
nuclear@0 45 int xi, yi;
nuclear@0 46 int i=0;
nuclear@0 47 int x, y;
nuclear@0 48 for (y=0; y<ScreenHeight; y++)
nuclear@0 49 {
nuclear@0 50 for (x=0; x<ScreenWidth; x++)
nuclear@0 51 {
nuclear@0 52 xi = (int)(-(x/rb_shortness));
nuclear@0 53 yi = (int)(-(y/rb_shortness));
nuclear@0 54 radir0[i] = (xi>>1) + (yi>>1)*ScreenWidth;
nuclear@0 55 radir1[i] = (xi>>2) + (yi>>2)*ScreenWidth;
nuclear@0 56 radir2[i] = (xi>>3) + (yi>>3)*ScreenWidth;
nuclear@0 57 i++;
nuclear@0 58 }
nuclear@0 59 }
nuclear@0 60
nuclear@0 61 i=0;
nuclear@0 62 for (y=0; y<ScreenHeight; y++)
nuclear@0 63 {
nuclear@0 64 for (x=0; x<ScreenWidth; x++)
nuclear@0 65 {
nuclear@0 66 xi = (int)(-(x/rb_shortness));
nuclear@0 67 yi = (int)(y/rb_shortness);
nuclear@0 68 radir3[i] = (xi>>1) + (yi>>1)*ScreenWidth;
nuclear@0 69 radir4[i] = (xi>>2) + (yi>>2)*ScreenWidth;
nuclear@0 70 radir5[i] = (xi>>3) + (yi>>3)*ScreenWidth;
nuclear@0 71 i++;
nuclear@0 72 }
nuclear@0 73 }
nuclear@0 74 }
nuclear@0 75
nuclear@0 76
nuclear@0 77 void InitRadialBitmapCopy()
nuclear@0 78 {
nuclear@0 79 int i;
nuclear@0 80 unsigned int *rbuffer32 = (unsigned int*)rbuffer, *gbuffer32 = (unsigned int*)gbuffer, *bbuffer32 = (unsigned int*)bbuffer;
nuclear@0 81 for (i=0; i<ScreenSize; i+=4)
nuclear@0 82 {
nuclear@0 83 *rbuffer32++ = rbmp[i] | (rbmp[i+1]<<8) | (rbmp[i+2]<<16) | (rbmp[i+3]<<24);
nuclear@0 84 *gbuffer32++ = gbmp[i] | (gbmp[i+1]<<8) | (gbmp[i+2]<<16) | (gbmp[i+3]<<24);
nuclear@0 85 *bbuffer32++ = bbmp[i] | (bbmp[i+1]<<8) | (bbmp[i+2]<<16) | (bbmp[i+3]<<24);
nuclear@0 86 }
nuclear@0 87 }
nuclear@0 88
nuclear@0 89 void Radial(int ntime, unsigned short *vram)
nuclear@0 90 {
nuclear@0 91 int i,ri;
nuclear@0 92
nuclear@0 93 int dcx = (int)(sin((float)ntime/23.0f)*(ScreenWidth>>1));
nuclear@0 94 int dcy = (int)(sin((float)ntime/32.0f)*(ScreenHeight>>1));
nuclear@0 95 int dci = dcx + dcy*ScreenWidth;
nuclear@0 96
nuclear@0 97 InitRadialBitmapCopy();
nuclear@0 98
nuclear@0 99 unsigned short *avram;
nuclear@0 100
nuclear@0 101 // 1o tetarthmorio
nuclear@0 102
nuclear@0 103 avram=(unsigned short*)vram + (ScreenWidth/2-1) + (ScreenHeight/2-1)*ScreenWidth + dci;
nuclear@0 104
nuclear@0 105 i=(ScreenWidth/2-1) + (ScreenHeight/2-1)*ScreenWidth + dci;
nuclear@0 106 ri=0;
nuclear@0 107 for (int y=ScreenHeight/2-1+dcy; y>=0; y--)
nuclear@0 108 {
nuclear@0 109 for (int x=ScreenWidth/2-1+dcx; x>=0; x--)
nuclear@0 110 {
nuclear@0 111
nuclear@0 112 rbuffer[i] = (rbuffer[i] + rbuffer[i - radir0[ri]] + rbuffer[i - radir1[ri]] + rbuffer[i - radir2[ri]])>>2;
nuclear@0 113 gbuffer[i] = (gbuffer[i] + gbuffer[i - radir0[ri]] + gbuffer[i - radir1[ri]] + gbuffer[i - radir2[ri]])>>2;
nuclear@0 114 bbuffer[i] = (bbuffer[i] + bbuffer[i - radir0[ri]] + bbuffer[i - radir1[ri]] + bbuffer[i - radir2[ri]])>>2;
nuclear@0 115 *avram-- = ((rbuffer[i]>>3)<<11) | ((gbuffer[i]>>2)<<5) | (bbuffer[i]>>3);
nuclear@0 116 i--;
nuclear@0 117 ri++;
nuclear@0 118 }
nuclear@0 119 i=i-ScreenWidth/2+dcx;
nuclear@0 120 ri+=ScreenWidth/2-dcx;
nuclear@0 121 avram=avram-ScreenWidth/2+dcx;
nuclear@0 122 }
nuclear@0 123
nuclear@0 124
nuclear@0 125 // 2 tetarthmorio
nuclear@0 126
nuclear@0 127 avram=(unsigned short*)vram + ScreenWidth/2 + (ScreenHeight/2-1)*ScreenWidth + dci;
nuclear@0 128
nuclear@0 129 i=ScreenWidth/2 + (ScreenHeight/2-1)*ScreenWidth + dci;
nuclear@0 130 ri=0;
nuclear@0 131 for (int y=ScreenHeight/2-1+dcy; y>=0; y--)
nuclear@0 132 {
nuclear@0 133 for (int x=ScreenWidth/2+dcx; x<ScreenWidth; x++)
nuclear@0 134 {
nuclear@0 135 rbuffer[i] = (rbuffer[i] + rbuffer[i + radir3[ri]] + rbuffer[i + radir4[ri]] + rbuffer[i + radir5[ri]])>>2;
nuclear@0 136 gbuffer[i] = (gbuffer[i] + gbuffer[i + radir3[ri]] + gbuffer[i + radir4[ri]] + gbuffer[i + radir5[ri]])>>2;
nuclear@0 137 bbuffer[i] = (bbuffer[i] + bbuffer[i + radir3[ri]] + bbuffer[i + radir4[ri]] + bbuffer[i + radir5[ri]])>>2;
nuclear@0 138 *avram++ = ((rbuffer[i]>>3)<<11) | ((gbuffer[i]>>2)<<5) | (bbuffer[i]>>3);
nuclear@0 139 i++;
nuclear@0 140 ri++;
nuclear@0 141 }
nuclear@0 142 i=i-3*(ScreenWidth/2)+dcx;
nuclear@0 143 ri+=ScreenWidth/2+dcx;
nuclear@0 144 avram=avram-3*(ScreenWidth/2)+dcx;
nuclear@0 145 }
nuclear@0 146
nuclear@0 147
nuclear@0 148 // 3 tetarthmorio
nuclear@0 149
nuclear@0 150 avram=(unsigned short*)vram + ScreenWidth/2 + (ScreenHeight/2)*ScreenWidth + dci;
nuclear@0 151
nuclear@0 152 i=ScreenWidth/2 + (ScreenHeight/2)*ScreenWidth + dci;
nuclear@0 153 ri=0;
nuclear@0 154 for (int y=ScreenHeight/2+dcy; y<ScreenHeight; y++)
nuclear@0 155 {
nuclear@0 156 for (int x=ScreenWidth/2+dcx; x<ScreenWidth; x++)
nuclear@0 157 {
nuclear@0 158 rbuffer[i] = (rbuffer[i] + rbuffer[i + radir0[ri]] + rbuffer[i + radir1[ri]] + rbuffer[i + radir2[ri]])>>2;
nuclear@0 159 gbuffer[i] = (gbuffer[i] + gbuffer[i + radir0[ri]] + gbuffer[i + radir1[ri]] + gbuffer[i + radir2[ri]])>>2;
nuclear@0 160 bbuffer[i] = (bbuffer[i] + bbuffer[i + radir0[ri]] + bbuffer[i + radir1[ri]] + bbuffer[i + radir2[ri]])>>2;
nuclear@0 161 *avram++ = ((rbuffer[i]>>3)<<11) | ((gbuffer[i]>>2)<<5) | (bbuffer[i]>>3);
nuclear@0 162 i++;
nuclear@0 163 ri++;
nuclear@0 164 }
nuclear@0 165 i+=ScreenWidth/2+dcx;
nuclear@0 166 ri+=ScreenWidth/2+dcx;
nuclear@0 167 avram+=ScreenWidth/2+dcx;
nuclear@0 168 }
nuclear@0 169
nuclear@0 170
nuclear@0 171
nuclear@0 172 // 4o tetarthmorio
nuclear@0 173
nuclear@0 174 avram=(unsigned short*)vram + (ScreenWidth/2-1) + (ScreenHeight/2)*ScreenWidth + dci;
nuclear@0 175
nuclear@0 176 i=(ScreenWidth/2-1) + (ScreenHeight/2)*ScreenWidth + dci;
nuclear@0 177 ri=0;
nuclear@0 178 for (int y=ScreenHeight/2+dcy; y<ScreenHeight; y++)
nuclear@0 179 {
nuclear@0 180 for (int x=ScreenWidth/2-1+dcx; x>=0; x--)
nuclear@0 181 {
nuclear@0 182 rbuffer[i] = (rbuffer[i] + rbuffer[i - radir3[ri]] + rbuffer[i - radir4[ri]] + rbuffer[i - radir5[ri]])>>2;
nuclear@0 183 gbuffer[i] = (gbuffer[i] + gbuffer[i - radir3[ri]] + gbuffer[i - radir4[ri]] + gbuffer[i - radir5[ri]])>>2;
nuclear@0 184 bbuffer[i] = (bbuffer[i] + bbuffer[i - radir3[ri]] + bbuffer[i - radir4[ri]] + bbuffer[i - radir5[ri]])>>2;
nuclear@0 185 *avram-- = ((rbuffer[i]>>3)<<11) | ((gbuffer[i]>>2)<<5) | (bbuffer[i]>>3);
nuclear@0 186 i--;
nuclear@0 187 ri++;
nuclear@0 188 }
nuclear@0 189 i+=3*(ScreenWidth/2)+dcx;
nuclear@0 190 ri+=ScreenWidth/2-dcx;
nuclear@0 191 avram+=3*(ScreenWidth/2)+dcx;
nuclear@0 192 }
nuclear@0 193 }
nuclear@0 194
nuclear@0 195 void RunRadialblur(int ntime, unsigned short *vram)
nuclear@0 196 {
nuclear@0 197 Radial(ntime, vram);
nuclear@0 198 }