--- /dev/null
+#include <math.h>
+#include <memory.h>
+#include "jpeg.h"
+#include "png.h"
+#include "mem.h"
+#include "gfximage.h"
+#include "types.h"
+
+void gfximage_save_jpeg(gfximage_t*img, int quality, const char*filename)
+{
+ int x,y;
+ int l = img->width*img->height;
+ unsigned char*data = (unsigned char*)rfx_alloc(img->width*img->height*3);
+ int s,t;
+ for(t=0,s=0;t<l;s+=3,t++) {
+ data[s+0] = img->data[t].r;
+ data[s+1] = img->data[t].g;
+ data[s+2] = img->data[t].b;
+ }
+ jpeg_save(data, img->width, img->height, quality, filename);
+}
+
+void gfximage_save_png(gfximage_t*image, const char*filename)
+{
+ writePNG(filename, (void*)image->data, image->width, image->height);
+}
+
+typedef struct scale_lookup {
+ int pos;
+ unsigned int weight;
+} scale_lookup_t;
+
+typedef struct rgba_int {
+ unsigned int r,g,b,a;
+} rgba_int_t;
+
+static int bicubic = 0;
+
+static scale_lookup_t**make_scale_lookup(int width, int newwidth)
+{
+ scale_lookup_t*lookupx = (scale_lookup_t*)rfx_alloc((width>newwidth?width:newwidth)*2*sizeof(scale_lookup_t));
+ scale_lookup_t**lblockx = (scale_lookup_t**)rfx_alloc((newwidth+1)*sizeof(scale_lookup_t**));
+ double fx = ((double)width)/((double)newwidth);
+ double px = 0;
+ int x;
+ scale_lookup_t*p_x = lookupx;
+
+ if(newwidth<=width) {
+ for(x=0;x<newwidth;x++) {
+ double ex = px + fx;
+ int fromx = (int)px;
+ int tox = (int)ex;
+ double rem = fromx+1-px;
+ int i = (int)(256/fx);
+ int xweight = (int)(rem*256/fx);
+ int xx;
+ int w = 0;
+ lblockx[x] = p_x;
+ if(tox>=width) tox = width-1;
+ for(xx=fromx;xx<=tox;xx++) {
+ if(xx==fromx && xx==tox) p_x->weight = 256;
+ else if(xx==fromx) p_x->weight = xweight;
+ else if(xx==tox) p_x->weight = 256-w;
+ else p_x->weight = i;
+ w+=p_x->weight;
+ p_x->pos = xx;
+ p_x++;
+ }
+ px = ex;
+ }
+ } else {
+ for(x=0;x<newwidth;x++) {
+ int ix1 = (int)px;
+ int ix2 = ((int)px)+1;
+ double r = px-ix1;
+ if(ix2>=width) ix2=width-1;
+ lblockx[x] = p_x;
+ if(bicubic)
+ r = -2*r*r*r+3*r*r;
+ p_x[0].weight = (int)(256*(1-r));
+ p_x[0].pos = ix1;
+ p_x[1].weight = 256-p_x[0].weight;
+ p_x[1].pos = ix2;
+ p_x+=2;
+ px += fx;
+ }
+ }
+ lblockx[newwidth] = p_x;
+ return lblockx;
+}
+
+static void encodeMonochromeImage(gfxcolor_t*data, int width, int height, gfxcolor_t*colors)
+{
+ int t;
+ int len = width*height;
+
+ U32* img = (U32*)data;
+ U32 color1 = img[0];
+ U32 color2 = 0;
+ for(t=1;t<len;t++) {
+ if(img[t] != color1) {
+ color2 = img[t];
+ break;
+ }
+ }
+ *(U32*)&colors[0] = color1;
+ *(U32*)&colors[1] = color2;
+ for(t=0;t<len;t++) {
+ if(img[t] == color1) {
+ img[t] = 0;
+ } else {
+ img[t] = 0xffffffff;
+ }
+ }
+}
+
+static void decodeMonochromeImage(gfxcolor_t*data, int width, int height, gfxcolor_t*colors)
+{
+ int t;
+ int len = width*height;
+
+ for(t=0;t<len;t++) {
+ U32 m = data[t].r;
+ data[t].r = (colors[0].r * (255-m) + colors[1].r * m) >> 8;
+ data[t].g = (colors[0].g * (255-m) + colors[1].g * m) >> 8;
+ data[t].b = (colors[0].b * (255-m) + colors[1].b * m) >> 8;
+ data[t].a = (colors[0].a * (255-m) + colors[1].a * m) >> 8;
+ }
+}
+
+void blurImage(gfxcolor_t*src, int width, int height, int r) __attribute__ ((noinline));
+
+void blurImage(gfxcolor_t*src, int width, int height, int r)
+{
+ int e = 2; // r times e is the sampling interval
+ double*gauss = (double*)rfx_alloc(r*e*sizeof(double));
+ double sum=0;
+ int x;
+ for(x=0;x<r*e;x++) {
+ double t = (x - r*e/2.0)/r;
+ gauss[x] = exp(-0.5*t*t);
+ sum += gauss[x];
+ }
+ int*weights = (int*)rfx_alloc(r*e*sizeof(int));
+ for(x=0;x<r*e;x++) {
+ weights[x] = (int)(gauss[x]*65536.0001/sum);
+ }
+ int range = r*e/2;
+
+ gfxcolor_t*tmp = rfx_alloc(sizeof(gfxcolor_t)*width*height);
+
+ int y;
+ for(y=0;y<height;y++) {
+ gfxcolor_t*s = &src[y*width];
+ gfxcolor_t*d = &tmp[y*width];
+ for(x=0;x<range;x++) {
+ d[x] = s[x];
+ }
+ for(x=range;x<width-range;x++) {
+ int r=0;
+ int g=0;
+ int b=0;
+ int a=0;
+ int*f = weights;
+ int xx;
+ for(xx=x-range;xx<x+range;xx++) {
+ r += s[xx].r * f[0];
+ g += s[xx].g * f[0];
+ b += s[xx].b * f[0];
+ a += s[xx].a * f[0];
+ f++;
+ }
+ d[x].r = r >> 16;
+ d[x].g = g >> 16;
+ d[x].b = b >> 16;
+ d[x].a = a >> 16;
+ }
+ for(x=width-range;x<width;x++) {
+ d[x] = s[x];
+ }
+ }
+
+ for(x=0;x<width;x++) {
+ gfxcolor_t*s = &tmp[x];
+ gfxcolor_t*d = &src[x];
+ int yy=0;
+ for(y=0;y<range;y++) {
+ d[yy] = s[yy];
+ yy+=width;
+ }
+ for(y=range;y<height-range;y++) {
+ int r=0;
+ int g=0;
+ int b=0;
+ int a=0;
+ int*f = weights;
+ int cy,cyy=yy-range*width;
+ for(cy=y-range;cy<y+range;cy++) {
+ r += s[cyy].r * f[0];
+ g += s[cyy].g * f[0];
+ b += s[cyy].b * f[0];
+ a += s[cyy].a * f[0];
+ cyy += width;
+ f++;
+ }
+ d[yy].r = r >> 16;
+ d[yy].g = g >> 16;
+ d[yy].b = b >> 16;
+ d[yy].a = a >> 16;
+ yy += width;
+ }
+ for(y=0;y<range;y++) {
+ d[yy] = s[yy];
+ yy += width;
+ }
+ }
+
+ rfx_free(tmp);
+ rfx_free(weights);
+ rfx_free(gauss);
+}
+
+int swf_ImageGetNumberOfPaletteEntries2(gfxcolor_t*_img, int width, int height)
+{
+ int len = width*height;
+ int t;
+ U32* img = (U32*)_img;
+ U32 color1 = img[0];
+ U32 color2 = 0;
+ for(t=1;t<len;t++) {
+ if(img[t] != color1) {
+ color2 = img[t];
+ break;
+ }
+ }
+ if(t==len)
+ return 1;
+
+ for(;t<len;t++) {
+ if(img[t] != color1 && img[t] != color2) {
+ return width*height;
+ }
+ }
+ return 2;
+}
+
+gfximage_t* gfximage_rescale(gfximage_t*image, int newwidth, int newheight)
+{
+ int x,y;
+ gfxcolor_t* newdata;
+ scale_lookup_t *p, **lblockx,**lblocky;
+ rgba_int_t*tmpline;
+ int monochrome = 0;
+ gfxcolor_t monochrome_colors[2];
+
+ if(newwidth<1 || newheight<1)
+ return 0;
+
+ int width = image->width;
+ int height = image->height;
+ gfxcolor_t*data = image->data;
+
+ if(swf_ImageGetNumberOfPaletteEntries2(data, width, height) == 2) {
+ monochrome=1;
+ encodeMonochromeImage(data, width, height, monochrome_colors);
+ int r1 = width / newwidth;
+ int r2 = height / newheight;
+ int r = r1<r2?r1:r2;
+ if(r>4) {
+ /* high-resolution monochrome images are usually dithered, so
+ low-pass filter them first to get rid of any moire patterns */
+ blurImage(data, width, height, r+1);
+ }
+ }
+
+ tmpline = (rgba_int_t*)rfx_alloc(width*sizeof(rgba_int_t));
+ newdata = (gfxcolor_t*)rfx_alloc(newwidth*newheight*sizeof(gfxcolor_t));
+
+ lblockx = make_scale_lookup(width, newwidth);
+ lblocky = make_scale_lookup(height, newheight);
+
+ for(p=lblocky[0];p<lblocky[newheight];p++)
+ p->pos*=width;
+
+ for(y=0;y<newheight;y++) {
+ gfxcolor_t*destline = &newdata[y*newwidth];
+
+ /* create lookup table for y */
+ rgba_int_t*l = tmpline;
+ scale_lookup_t*p_y,*p_x;
+ memset(tmpline, 0, width*sizeof(rgba_int_t));
+ for(p_y=lblocky[y];p_y<lblocky[y+1];p_y++) {
+ gfxcolor_t*line = &data[p_y->pos];
+ scale_lookup_t*p_x;
+ int weight = p_y->weight;
+ for(x=0;x<width;x++) {
+ tmpline[x].r += line[x].r*weight;
+ tmpline[x].g += line[x].g*weight;
+ tmpline[x].b += line[x].b*weight;
+ tmpline[x].a += line[x].a*weight;
+ }
+ }
+
+ /* process x direction */
+ p_x = lblockx[0];
+ for(x=0;x<newwidth;x++) {
+ unsigned int r=0,g=0,b=0,a=0;
+ scale_lookup_t*p_x_to = lblockx[x+1];
+ do {
+ rgba_int_t* col = &tmpline[p_x->pos];
+ unsigned int weight = p_x->weight;
+ r += col->r*weight;
+ g += col->g*weight;
+ b += col->b*weight;
+ a += col->a*weight;
+ p_x++;
+ } while (p_x<p_x_to);
+
+ destline->r = r >> 16;
+ destline->g = g >> 16;
+ destline->b = b >> 16;
+ destline->a = a >> 16;
+
+ destline++;
+ }
+ }
+
+ if(monochrome)
+ decodeMonochromeImage(newdata, newwidth, newheight, monochrome_colors);
+
+ rfx_free(tmpline);
+ rfx_free(*lblockx);
+ rfx_free(lblockx);
+ rfx_free(*lblocky);
+ rfx_free(lblocky);
+
+ gfximage_t*image2 = (gfximage_t*)malloc(sizeof(gfximage_t));
+ image2->data = newdata;
+ image2->width = newwidth;
+ image2->height = newheight;
+ return image2;
+}
git.asbjorn.biz / swftools.git / blobdiff