mirror of
https://github.com/ultimatepp/ultimatepp.git
synced 2026-05-16 06:05:58 -06:00
365 lines
7.1 KiB
C++
365 lines
7.1 KiB
C++
#include "Draw.h"
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namespace Upp {
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const byte *UnpackRLE(RGBA *t, const byte *s, int len)
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{
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RGBA *e = t + len;
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while(t < e)
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if(*s & 0x80) {
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if(*s == 0x80)
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break;
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int count = min<int>((int)(*s & 0x3F), (int)(e - t));
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RGBA h;
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if(*s++ & 0x40)
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Zero(h);
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else {
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h.b = s[0];
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h.g = s[1];
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h.r = s[2];
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h.a = 255;
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s += 3;
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}
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count = min<int>(count, (int)(e - t));
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Fill(t, h, count);
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t += count;
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}
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else {
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if(*s == 0)
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break;
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int count = *s++;
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while(count-- && t < e) {
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RGBA h;
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h.b = s[0];
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h.g = s[1];
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h.r = s[2];
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h.a = 255;
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*t++ = h;
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s += 3;
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}
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}
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while(t < e)
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Zero(*t++);
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return s;
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}
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String PackRLE(const RGBA *s, int len)
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{
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StringBuffer r;
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const RGBA *e = s + len;
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while(s < e) {
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const RGBA *q = s;
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if(s->a == 0) {
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s++;
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while(s < e && s->a == 0 && s - q < 0x3f)
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s++;
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r.Cat((0x80|0x40) + (int)(s - q));
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}
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else
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if(s + 1 < e && s[0] == s[1]) {
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s++;
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while(s + 1 < e && s[0] == s[1] && s - q < 0x3e)
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s++;
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s++;
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r.Cat(0x80 + (int)(s - q));
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r.Cat(q->b);
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r.Cat(q->g);
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r.Cat(q->r);
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}
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else {
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s++;
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while(s + 1 < e && s->a && s[0] != s[1] && s - q < 0x3f)
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s++;
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r.Cat((int)(s - q));
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while(q < s) {
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r.Cat(q->b);
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r.Cat(q->g);
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r.Cat(q->r);
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q++;
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}
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}
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}
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return String(r);
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}
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int Premultiply(RGBA *t, const RGBA *s, int len)
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{
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const RGBA *e = s + len;
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while(s < e) {
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if(s->a != 255) {
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while(s < e) {
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byte a = s->a;
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if(s->a != 0 && s->a != 255) {
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while(s < e) {
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int alpha = s->a + (s->a >> 7);
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t->r = alpha * (s->r) >> 8;
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t->g = alpha * (s->g) >> 8;
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t->b = alpha * (s->b) >> 8;
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t->a = s->a;
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s++;
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t++;
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}
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return IMAGE_ALPHA;
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}
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t->r = a & s->r;
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t->g = a & s->g;
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t->b = a & s->b;
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t->a = s->a;
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s++;
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t++;
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}
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return IMAGE_MASK;
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}
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*t++ = *s++;
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}
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return IMAGE_OPAQUE;
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}
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int um_table__[256];
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void sInitUmTable__()
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{
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ONCELOCK {
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for(int i = 1; i < 256; i++)
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um_table__[i] = 65536 / i;
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}
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}
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int Unmultiply(RGBA *t, const RGBA *s, int len)
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{
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sInitUmTable__();
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const RGBA *e = s + len;
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while(s < e) {
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if(s->a != 255) {
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while(s < e) {
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byte a = s->a;
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if(s->a != 0 && s->a != 255) {
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while(s < e) {
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int alpha = um_table__[s->a];
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t->r = (alpha * s->r) >> 8;
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t->g = (alpha * s->g) >> 8;
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t->b = (alpha * s->b) >> 8;
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t->a = s->a;
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s++;
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t++;
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}
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return IMAGE_ALPHA;
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}
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t->r = a & s->r;
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t->g = a & s->g;
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t->b = a & s->b;
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t->a = s->a;
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s++;
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t++;
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}
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return IMAGE_MASK;
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}
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*t++ = *s++;
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}
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return IMAGE_OPAQUE;
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}
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void AlphaBlend(RGBA *t, const RGBA *s, int len)
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{
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const RGBA *e = s + len;
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while(s < e) {
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int alpha = 256 - (s->a + (s->a >> 7));
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t->r = s->r + (alpha * t->r >> 8);
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t->g = s->g + (alpha * t->g >> 8);
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t->b = s->b + (alpha * t->b >> 8);
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t->a = s->a + (alpha * t->a >> 8);
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s++;
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t++;
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}
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}
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void AlphaBlendOpaque(RGBA *t, const RGBA *s, int len)
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{
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const RGBA *e = s + len;
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while(s < e) {
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int alpha = 256 - (s->a + (s->a >> 7));
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t->r = s->r + (alpha * t->r >> 8);
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t->g = s->g + (alpha * t->g >> 8);
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t->b = s->b + (alpha * t->b >> 8);
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t->a = 255;
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s++;
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t++;
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}
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}
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void AlphaBlend(RGBA *t, const RGBA *s, int len, Color color)
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{
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const RGBA *e = s + len;
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int r = color.GetR();
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int g = color.GetG();
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int b = color.GetB();
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while(s < e) {
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int alpha = s->a + (s->a >> 7);
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t->r += alpha * (r - t->r) >> 8;
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t->g += alpha * (g - t->g) >> 8;
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t->b += alpha * (b - t->b) >> 8;
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t->a = s->a + ((256 - alpha) * t->a >> 8);
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s++;
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t++;
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}
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}
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void AlphaBlendOpaque(RGBA *t, const RGBA *s, int len, Color color)
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{
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const RGBA *e = s + len;
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int r = color.GetR();
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int g = color.GetG();
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int b = color.GetB();
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while(s < e) {
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int alpha = s->a + (s->a >> 7);
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t->r += alpha * (r - t->r) >> 8;
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t->g += alpha * (g - t->g) >> 8;
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t->b += alpha * (b - t->b) >> 8;
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t->a = 255;
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s++;
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t++;
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}
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}
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void AlphaBlendStraightOpaque(RGBA *t, const RGBA *s, int len)
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{
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const RGBA *e = s + len;
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while(s < e) {
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int alpha = s->a + (s->a >> 7);
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t->r += alpha * (s->r - t->r) >> 8;
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t->g += alpha * (s->g - t->g) >> 8;
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t->b += alpha * (s->b - t->b) >> 8;
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t->a = 255;
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s++;
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t++;
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}
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}
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void AlphaBlendStraightOpaque(RGBA *t, const RGBA *s, int len, int alpha)
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{
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if(alpha >= 256) {
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AlphaBlendStraightOpaque(t, s, len);
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return;
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}
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const RGBA *e = s + len;
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alpha *= 0x102;
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while(s < e) {
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int a = (s->a * alpha) >> 16;
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t->r += a * (s->r - t->r) >> 8;
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t->g += a * (s->g - t->g) >> 8;
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t->b += a * (s->b - t->b) >> 8;
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t->a = 255;
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s++;
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t++;
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}
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}
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struct sBlends {
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int16 m;
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byte a;
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};
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sBlends *sblends;
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void sOnceInitBlends()
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{
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ONCELOCK {
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sblends = (sBlends *)MemoryAllocPermanent(256 * 256 * sizeof(sBlends));
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for(int Fa = 0; Fa <= 255; Fa++)
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for(int Ba = 0; Ba <= 255; Ba++) {
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double A = (Fa / 255.0 + Ba / 255.0 - Fa / 255.0 * Ba / 255.0);
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sblends[(Ba << 8) + Fa].a = minmax((int)(255 * A + 0.5), 0, 255);
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sblends[(Ba << 8) + Fa].m = A > 0.001 ? int(256 * (Fa / 255.0) / A + 0.5) : 0;
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}
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}
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}
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inline void sInitBlends()
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{
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if(!sblends)
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sOnceInitBlends();
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}
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void AlphaBlendStraight(RGBA *b, const RGBA *f, int len)
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{
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sInitBlends();
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const RGBA *e = f + len;
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while(f < e) {
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sBlends& x = sblends[(b->a << 8) + f->a];
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int m = x.m;
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b->a = x.a;
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b->r += m * (f->r - b->r) >> 8;
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b->g += m * (f->g - b->g) >> 8;
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b->b += m * (f->b - b->b) >> 8;
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b++;
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f++;
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}
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}
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void AlphaBlendOverBgStraight(RGBA *b, RGBA bg, int len)
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{
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sInitBlends();
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const RGBA *e = b + len;
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while(b < e) {
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sBlends& x = sblends[(bg.a << 8) + b->a];
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int m = x.m;
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b->a = x.a;
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b->r = bg.r + (m * (b->r - bg.r) >> 8);
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b->g = bg.g + (m * (b->g - bg.g) >> 8);
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b->b = bg.b + (m * (b->b - bg.b) >> 8);
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b++;
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}
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}
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void AlphaBlendStraight(RGBA *b, const RGBA *f, int len, Color color)
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{
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sInitBlends();
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const RGBA *e = f + len;
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int cr = color.GetR();
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int cg = color.GetG();
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int cb = color.GetB();
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while(f < e) {
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sBlends& x = sblends[(b->a << 8) + f->a];
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int m = x.m;
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b->a = x.a;
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b->r += m * (cr - b->r) >> 8;
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b->g += m * (cg - b->g) >> 8;
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b->b += m * (cb - b->b) >> 8;
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b++;
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f++;
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}
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}
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int GetChMaskPos32(dword mask)
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{
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if(mask == 0xff000000)
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return 3;
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if(mask == 0xff0000)
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return 2;
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if(mask == 0xff00)
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return 1;
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return 0;
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}
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void TransformComponents(RGBA *t, const RGBA *s, int len,
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const byte r[], const byte g[], const byte b[], const byte a[])
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{
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while(--len >= 0) {
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t->r = r[s->r];
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t->g = g[s->g];
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t->b = b[s->b];
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t->a = a[s->a];
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s++;
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t++;
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}
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}
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void MultiplyComponents(RGBA *t, const RGBA *s, int len, int num, int den)
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{
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byte trans[256];
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for(int i = 0; i < 256; i++)
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trans[i] = (byte)minmax((2 * i + 1) * num / (2 * den), 0, 255);
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TransformComponents(t, s, len, trans, trans, trans, trans);
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}
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}
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