+ }
+
+ cinfo.err = jpeg_std_error(&jerr);
+ jpeg_create_decompress(&cinfo);
+
+ cinfo.client_data = (void *) tag;
+ cinfo.src = &mgr;
+ cinfo.src->init_source = tag_init_source;
+ cinfo.src->fill_input_buffer = tag_fill_input_buffer;
+ cinfo.src->skip_input_data = tag_skip_input_data;
+ cinfo.src->resync_to_restart = jpeg_resync_to_restart;
+ cinfo.src->term_source = tag_term_source;
+ cinfo.out_color_space = JCS_RGB;
+
+ jpeg_read_header(&cinfo, TRUE);
+ *width = cinfo.image_width;
+ *height = cinfo.image_height;
+ dest = (RGBA*)
+ rfx_alloc(sizeof(RGBA) * cinfo.image_width * cinfo.image_height);
+
+ jpeg_start_decompress(&cinfo);
+ for (y = 0; y < cinfo.output_height; y++) {
+ RGBA *line = &dest[y * cinfo.image_width];
+ U8 *to = (U8 *) line;
+ int x;
+ jpeg_read_scanlines(&cinfo, &to, 1);
+ for (x = cinfo.output_width - 1; x >= 0; --x) {
+ int r = to[x * 3 + 0];
+ int g = to[x * 3 + 1];
+ int b = to[x * 3 + 2];
+ line[x].r = r;
+ line[x].g = g;
+ line[x].b = b;
+ line[x].a = 255;
+ }
+ }
+
+ jpeg_finish_decompress(&cinfo);
+
+ jpeg_destroy_decompress(&cinfo);
+
+#ifdef HAVE_ZLIB
+ if(offset) {
+ uLongf datalen = cinfo.output_width*cinfo.output_height;
+ U8* alphadata = (U8*)rfx_alloc(datalen);
+ int error;
+ tag->len = oldtaglen;
+ swf_SetTagPos(tag, 6+offset);
+ error = uncompress(alphadata, &datalen, &tag->data[tag->pos], tag->len - tag->pos);
+ if (error != Z_OK) {
+ fprintf(stderr, "rfxswf: Zlib error %d while extracting definejpeg3\n", error);
+ return 0;
+ }
+ for(y=0;y<cinfo.output_height;y++) {
+ RGBA*line = &dest[y*cinfo.output_width];
+ U8*aline = &alphadata[y*cinfo.output_width];
+ int x;
+ for(x=0;x<cinfo.output_width;x++) {
+ line[x].a = aline[x];
+ }
+ }
+ free(alphadata);
+ }
+#endif
+ return dest;
+}
+
+#endif // HAVE_JPEGLIB
+
+// Lossless compression texture based on zlib
+
+#ifdef HAVE_ZLIB
+
+int RFXSWF_deflate_wraper(TAG * t, z_stream * zs, boolean finish)
+{
+ U8 *data = (U8*)rfx_alloc(OUTBUFFER_SIZE);
+ zs->next_out = data;
+ zs->avail_out = OUTBUFFER_SIZE;
+ while (1) {
+ int status = deflate(zs, Z_NO_FLUSH);
+
+ if (status != Z_OK) {
+ fprintf(stderr, "rfxswf: zlib compression error (%i)\n", status);
+ rfx_free(data);
+ return status;
+ }
+
+ if (zs->next_out != data) {
+ swf_SetBlock(t, data, zs->next_out - data);
+ zs->next_out = data;
+ zs->avail_out = OUTBUFFER_SIZE;
+ }
+
+ if (zs->avail_in == 0)
+ break;
+ }
+
+ if (!finish) {
+ rfx_free(data);
+ return 0;
+ }
+
+ while (1) {
+ int status = deflate(zs, Z_FINISH);
+ if (status != Z_OK && status != Z_STREAM_END) {
+ fprintf(stderr, "rfxswf: zlib compression error (%i)\n", status);
+ rfx_free(data);
+ return status;
+ }
+
+ if (zs->next_out != data) {
+ swf_SetBlock(t, data, zs->next_out - data);
+ zs->next_out = data;
+ zs->avail_out = OUTBUFFER_SIZE;
+ }
+
+ if (status == Z_STREAM_END)
+ break;
+ }
+ rfx_free(data);
+ return 0;
+}
+
+
+int swf_SetLosslessBits(TAG * t, U16 width, U16 height, void *bitmap, U8 bitmap_flags)
+{
+ int res = 0;
+ int bps;
+
+ switch (bitmap_flags) {
+ case BMF_8BIT:
+ return swf_SetLosslessBitsIndexed(t, width, height, (U8*)bitmap, NULL, 256);
+ case BMF_16BIT:
+ bps = BYTES_PER_SCANLINE(sizeof(U16) * width);
+ break;
+ case BMF_32BIT:
+ bps = width * 4;
+ break;
+ default:
+ fprintf(stderr, "rfxswf: unknown bitmap type %d\n", bitmap_flags);
+ return -1;
+ }
+
+ swf_SetU8(t, bitmap_flags);
+ swf_SetU16(t, width);
+ swf_SetU16(t, height);
+
+ {
+ z_stream zs;
+
+ memset(&zs, 0x00, sizeof(z_stream));
+ zs.zalloc = Z_NULL;
+ zs.zfree = Z_NULL;
+
+ if (deflateInit(&zs, Z_DEFAULT_COMPRESSION) == Z_OK) {
+ zs.avail_in = bps * height;
+ zs.next_in = (Bytef *)bitmap;
+
+ if (RFXSWF_deflate_wraper(t, &zs, TRUE) < 0)
+ res = -3;
+ deflateEnd(&zs);
+
+ } else
+ res = -3; // zlib error
+ }
+ return res;
+}
+
+int swf_SetLosslessBitsIndexed(TAG * t, U16 width, U16 height, U8 * bitmap, RGBA * palette, U16 ncolors)
+{
+ RGBA *pal = palette;
+ int bps = BYTES_PER_SCANLINE(width);
+ int res = 0;
+
+ if (!pal) // create default palette for grayscale images
+ {
+ int i;
+ pal = (RGBA*)rfx_alloc(256 * sizeof(RGBA));
+ for (i = 0; i < 256; i++) {
+ pal[i].r = pal[i].g = pal[i].b = i;
+ pal[i].a = 0xff;
+ }
+ ncolors = 256;
+ }
+
+ if ((ncolors < 2) || (ncolors > 256) || (!t)) {
+ fprintf(stderr, "rfxswf: unsupported number of colors: %d\n",
+ ncolors);
+ return -1; // parameter error
+ }
+
+ swf_SetU8(t, BMF_8BIT);
+ swf_SetU16(t, width);
+ swf_SetU16(t, height);
+ swf_SetU8(t, ncolors - 1); // number of pal entries
+
+ {
+ z_stream zs;
+
+ memset(&zs, 0x00, sizeof(z_stream));
+ zs.zalloc = Z_NULL;
+ zs.zfree = Z_NULL;
+
+ if (deflateInit(&zs, Z_DEFAULT_COMPRESSION) == Z_OK) {
+ U8 *zpal; // compress palette
+ if ((zpal = (U8*)rfx_alloc(ncolors * 4))) {
+ U8 *pp = zpal;
+ int i;
+
+ /* be careful with ST_DEFINEBITSLOSSLESS2, because
+ the Flash player produces great bugs if you use too many
+ alpha colors in your palette. The only sensible result that
+ can be archeived is setting one color to r=0,b=0,g=0,a=0 to
+ make transparent parts in sprites. That's the cause why alpha
+ handling is implemented in lossless routines of rfxswf.
+
+ Indeed: I haven't understood yet how flash player handles
+ alpha values different from 0 and 0xff in lossless bitmaps...
+ */
+
+ if (swf_GetTagID(t) == ST_DEFINEBITSLOSSLESS2) // have alpha channel?
+ {
+ for (i = 0; i < ncolors; i++) {
+ pp[0] = pal[i].r;
+ pp[1] = pal[i].g;
+ pp[2] = pal[i].b;
+ pp[3] = pal[i].a;
+ pp += 4;
+ }
+ zs.avail_in = 4 * ncolors;
+ } else {
+ for (i = 0; i < ncolors; i++) // pack RGBA structures to RGB
+ {
+ pp[0] = pal[i].r;
+ pp[1] = pal[i].g;
+ pp[2] = pal[i].b;
+ pp += 3;
+ }
+ zs.avail_in = 3 * ncolors;
+ }
+
+ zs.next_in = zpal;
+
+ if (RFXSWF_deflate_wraper(t, &zs, FALSE) < 0)
+ res = -3;
+
+ // compress bitmap
+ zs.next_in = bitmap;
+ zs.avail_in = (bps * height * sizeof(U8));
+
+ if (RFXSWF_deflate_wraper(t, &zs, TRUE) < 0)
+ res = -3;
+
+ deflateEnd(&zs);
+
+ rfx_free(zpal);
+ } else
+ res = -2; // memory error
+ } else
+ res = -3; // zlib error
+ }
+
+ if (!palette)
+ rfx_free(pal);
+
+ return res;
+}
+
+int swf_SetLosslessBitsGrayscale(TAG * t, U16 width, U16 height, U8 * bitmap)
+{
+ return swf_SetLosslessBitsIndexed(t, width, height, bitmap, NULL, 256);
+}
+
+void swf_PreMultiplyAlpha(RGBA*data, int width, int height)
+{
+ int num = width*height;
+ int t;
+ for(t=0;t<num;t++) {
+ data[t].r = ((int)data[t].r*data[t].a)/255;
+ data[t].g = ((int)data[t].g*data[t].a)/255;
+ data[t].b = ((int)data[t].b*data[t].a)/255;
+ }
+}
+
+/* expects mem to be non-premultiplied */
+void swf_SetLosslessImage(TAG*tag, RGBA*data, int width, int height)
+{
+ int hasalpha = swf_ImageHasAlpha(data, width, height);
+ int num;
+ if(!hasalpha) {
+ tag->id = ST_DEFINEBITSLOSSLESS;
+ } else {
+ tag->id = ST_DEFINEBITSLOSSLESS2;
+ swf_PreMultiplyAlpha(data, width, height);
+ }
+ num = swf_ImageGetNumberOfPaletteEntries(data, width, height, 0);
+ if(num>1 && num<=256) {
+ RGBA*palette = (RGBA*)malloc(sizeof(RGBA)*num);
+ int width2 = BYTES_PER_SCANLINE(width);
+ U8*data2 = (U8*)malloc(width2*height);
+ int len = width*height;
+ int x,y;
+ int r;
+ swf_ImageGetNumberOfPaletteEntries(data, width, height, palette);
+ for(y=0;y<height;y++) {
+ RGBA*src = &data[width*y];
+ U8*dest = &data2[width2*y];
+ for(x=0;x<width;x++) {
+ RGBA col = src[x];
+ for(r=0;r<num;r++) {
+ if(*(U32*)&col == *(U32*)&palette[r]) {
+ dest[x] = r;
+ break;
+ }
+ }
+ if(r==num) {
+ fprintf(stderr, "Internal error: Couldn't find color %02x%02x%02x%02x in palette (%d entries)\n",
+ col.r, col.g, col.b, col.a, num);
+ dest[x] = 0;
+ }
+ }
+ }
+ swf_SetLosslessBitsIndexed(tag, width, height, data2, palette, num);
+ free(data2);
+ free(palette);
+ } else {
+ swf_SetLosslessBits(tag, width, height, data, BMF_32BIT);
+ }
+}
+
+RGBA *swf_DefineLosslessBitsTagToImage(TAG * tag, int *dwidth, int *dheight)
+{
+ int id, format, height, width, pos;
+ uLongf datalen, datalen2;
+ int error;
+ int bpp = 1;
+ int cols = 0;
+ int pos2 = 0;
+ char alpha = tag->id == ST_DEFINEBITSLOSSLESS2;
+ int t, x, y;
+ RGBA *palette = 0;
+ U8 *data, *data2;
+ RGBA *dest;
+ if (tag->id != ST_DEFINEBITSLOSSLESS &&
+ tag->id != ST_DEFINEBITSLOSSLESS2) {
+ fprintf(stderr, "rfxswf: Object %d is not a PNG picture!\n",
+ GET16(tag->data));
+ return 0;
+ }
+ swf_SetTagPos(tag, 0);
+ id = swf_GetU16(tag);
+ format = swf_GetU8(tag);
+ if (format == 3)
+ bpp = 8;
+ if (format == 4)
+ bpp = 16;
+ if (format == 5)
+ bpp = 32;
+ if (format != 3 && format != 5) {
+ if (format == 4)
+ fprintf(stderr,
+ "rfxswf: Can't handle 16-bit palette images yet (image %d)\n",
+ id);
+ else
+ fprintf(stderr, "rfxswf: Unknown image type %d in image %d\n",
+ format, id);
+ return 0;
+ }
+ *dwidth = width = swf_GetU16(tag);
+ *dheight = height = swf_GetU16(tag);
+
+ dest = (RGBA*)rfx_alloc(sizeof(RGBA) * width * height);
+
+ if (format == 3)
+ cols = swf_GetU8(tag) + 1;
+ else
+ cols = 0;
+
+ data = 0;
+ datalen = (width * height * bpp / 8 + cols * 8);
+ do {
+ if (data)
+ rfx_free(data);
+ datalen += 4096;
+ data = (U8*)rfx_alloc(datalen);
+ error =
+ uncompress(data, &datalen, &tag->data[tag->pos],
+ tag->len - tag->pos);
+ } while (error == Z_BUF_ERROR);
+ if (error != Z_OK) {
+ fprintf(stderr, "rfxswf: Zlib error %d (image %d)\n", error, id);
+ return 0;
+ }
+ pos = 0;
+
+ if (cols) {
+ palette = (RGBA *) rfx_alloc(cols * sizeof(RGBA));
+ for (t = 0; t < cols; t++) {
+ palette[t].r = data[pos++];
+ palette[t].g = data[pos++];
+ palette[t].b = data[pos++];
+ if (alpha) {
+ palette[t].a = data[pos++];
+ } else {
+ palette[t].a = 255;
+ }
+ }
+ }
+
+ for (y = 0; y < height; y++) {
+ int srcwidth = width * (bpp / 8);
+ if (bpp == 32) {
+ if (!alpha) {
+ // 32 bit to 24 bit "conversion"
+ for (x = 0; x < width; x++) {
+ dest[pos2].r = data[pos + 1];
+ dest[pos2].g = data[pos + 2];
+ dest[pos2].b = data[pos + 3];
+ dest[pos2].a = 255;
+ pos2++;
+ pos += 4; //ignore padding byte
+ }
+ } else {
+ for (x = 0; x < width; x++) {
+ /* remove premultiplication */
+ int alpha = data[pos+0];
+ if(alpha)
+ alpha = 0xff0000/alpha;
+ dest[pos2].r = (data[pos + 1]*alpha)>>16;
+ dest[pos2].g = (data[pos + 2]*alpha)>>16;
+ dest[pos2].b = (data[pos + 3]*alpha)>>16;
+ dest[pos2].a = data[pos + 0]; //alpha
+ pos2++;
+ pos += 4;
+ }
+ }
+ } else {
+ for (x = 0; x < srcwidth; x++) {
+ dest[pos2] = palette[data[pos++]];
+ pos2++;
+ }
+ }
+ pos += ((srcwidth + 3) & ~3) - srcwidth; //align
+ }
+ if (palette)
+ rfx_free(palette);
+ rfx_free(data);
+ return dest;
+}
+
+#endif // HAVE_ZLIB
+
+#if defined(HAVE_ZLIB) && defined(HAVE_JPEGLIB)
+
+/* expects bitmap to be non-premultiplied */
+int swf_SetJPEGBits3(TAG * tag, U16 width, U16 height, RGBA * bitmap, int quality)
+{
+ JPEGBITS *jpeg;
+ int y;
+ int pos;
+ int res = 0;
+ U8 *data;
+ z_stream zs;
+
+ pos = tag->len;
+ swf_SetU32(tag, 0); //placeholder
+ jpeg = swf_SetJPEGBitsStart(tag, width, height, quality);
+ U8 *scanline = (U8*)rfx_alloc(3 * width);
+ for (y = 0; y < height; y++) {
+ int x, p = 0;
+ for (x = 0; x < width; x++) {
+ //int ia = bitmap[width*y+x].a;
+ //if(ia) {
+ // /* remove premultiplication */
+ // ia = 0xff0000/ia;
+ //}
+ //scanline[p++] = (bitmap[width * y + x].r*ia)>>16;
+ //scanline[p++] = (bitmap[width * y + x].g*ia)>>16;
+ //scanline[p++] = (bitmap[width * y + x].b*ia)>>16;
+ scanline[p++] = bitmap[width * y + x].r;
+ scanline[p++] = bitmap[width * y + x].g;
+ scanline[p++] = bitmap[width * y + x].b;
+ }
+ swf_SetJPEGBitsLine(jpeg, scanline);
+ }
+ rfx_free(scanline);
+ swf_SetJPEGBitsFinish(jpeg);
+ PUT32(&tag->data[pos], tag->len - pos - 4);
+
+ data = (U8*)rfx_alloc(OUTBUFFER_SIZE);
+ memset(&zs, 0x00, sizeof(z_stream));
+
+ if (deflateInit(&zs, Z_DEFAULT_COMPRESSION) != Z_OK) {
+ fprintf(stderr, "rfxswf: zlib compression failed");
+ return -3;
+ }
+
+ zs.next_out = data;
+ zs.avail_out = OUTBUFFER_SIZE;
+
+ scanline = (U8*)rfx_alloc(width);
+ for (y = 0; y < height; y++) {
+ int x, p = 0;
+ for (x = 0; x < width; x++) {
+ scanline[p++] = bitmap[width * y + x].a;
+ }
+ zs.avail_in = width;
+ zs.next_in = scanline;
+
+ while (1) {
+ if (deflate(&zs, Z_NO_FLUSH) != Z_OK) {
+ fprintf(stderr, "rfxswf: zlib compression failed");
+ return -4;
+ }
+ if (zs.next_out != data) {
+ swf_SetBlock(tag, data, zs.next_out - data);
+ zs.next_out = data;
+ zs.avail_out = OUTBUFFER_SIZE;
+ }
+ if (!zs.avail_in) {
+ break;
+ }
+ }
+ }
+
+ rfx_free(scanline);
+
+ while (1) {
+ int ret = deflate(&zs, Z_FINISH);
+ if (ret != Z_OK && ret != Z_STREAM_END) {
+ fprintf(stderr, "rfxswf: zlib compression failed");
+ return -5;
+ }
+ if (zs.next_out != data) {
+ swf_SetBlock(tag, data, zs.next_out - data);
+ zs.next_out = data;
+ zs.avail_out = OUTBUFFER_SIZE;
+ }
+ if (ret == Z_STREAM_END) {
+ break;
+ }
+ }
+
+ deflateEnd(&zs);
+ rfx_free(data);
+ return 0;
+}
+
+#else
+int swf_SetJPEGBits3(TAG * tag, U16 width, U16 height, RGBA * bitmap, int quality)
+{
+ fprintf(stderr, "Error: swftools compiled without jpeglib\n");
+ return -1;
+}
+#endif
+
+
+/* expects mem to be non-premultiplied */
+TAG* swf_AddImage(TAG*tag, int bitid, RGBA*mem, int width, int height, int quality)
+{
+ TAG *tag1 = 0, *tag2 = 0;
+ int has_alpha = swf_ImageHasAlpha(mem,width,height);
+
+ /* try lossless image */
+ tag1 = swf_InsertTag(0, /*ST_DEFINEBITSLOSSLESS1/2*/0);
+ swf_SetU16(tag1, bitid);
+ swf_SetLosslessImage(tag1, mem, width, height);
+
+#if defined(HAVE_JPEGLIB)
+ /* try jpeg image */
+ if(has_alpha) {
+ tag2 = swf_InsertTag(0, ST_DEFINEBITSJPEG3);
+ swf_SetU16(tag2, bitid);
+ swf_SetJPEGBits3(tag2, width, height, mem, quality);
+ } else {
+ tag2 = swf_InsertTag(0, ST_DEFINEBITSJPEG2);
+ swf_SetU16(tag2, bitid);
+ swf_SetJPEGBits2(tag2, width, height, mem, quality);
+ }
+#endif
+
+ if(quality>100 || !tag2 || (tag1 && tag1->len < tag2->len)) {
+ /* use the zlib version- it's smaller */
+ tag1->prev = tag;
+ if(tag) tag->next = tag1;
+ tag = tag1;
+ swf_DeleteTag(0, tag2);
+ } else {
+ /* use the jpeg version- it's smaller */
+ tag2->prev = tag;
+ if(tag) tag->next = tag2;
+ tag = tag2;
+ swf_DeleteTag(0, tag1);
+ }
+ return tag;
+}
+
+RGBA *swf_ExtractImage(TAG * tag, int *dwidth, int *dheight)
+{
+ RGBA *img;
+
+ swf_SetTagPos(tag, 2); // id is 2 bytes
+
+ if (tag->id == ST_DEFINEBITSJPEG ||
+ tag->id == ST_DEFINEBITSJPEG2 || tag->id == ST_DEFINEBITSJPEG3) {
+#ifdef HAVE_JPEGLIB
+ return swf_JPEG2TagToImage(tag, dwidth, dheight);
+#else
+ fprintf(stderr, "rfxswf: Error: No JPEG library compiled in");
+ return 0;
+#endif
+ }
+ if (tag->id == ST_DEFINEBITSLOSSLESS ||
+ tag->id == ST_DEFINEBITSLOSSLESS2) {
+#ifdef HAVE_ZLIB
+ return swf_DefineLosslessBitsTagToImage(tag, dwidth, dheight);
+#else
+ fprintf(stderr, "rfxswf: Error: No JPEG library compiled in");
+ return 0;
+#endif
+ }
+ fprintf(stderr, "rfxswf: Error: Invalid tag (%d, %s)", tag->id,
+ swf_TagGetName(tag));
+ return 0;
+}
+
+#undef OUTBUFFER_SIZE
+
+
+void swf_RemoveJPEGTables(SWF * swf)
+{
+ TAG *tag = swf->firstTag;
+ TAG *tables_tag = 0;
+ while (tag) {
+ if (tag->id == ST_JPEGTABLES) {
+ tables_tag = tag;
+ }
+ tag = tag->next;
+ }
+
+ if (!tables_tag)
+ return;
+
+ tag = swf->firstTag;
+ while (tag) {
+ if (tag->id == ST_DEFINEBITSJPEG) {
+ int len = tag->len;
+ void *data = rfx_alloc(len);
+ swf_GetBlock(tag, (U8*)data, tag->len);
+ swf_ResetTag(tag, ST_DEFINEBITSJPEG2);
+ swf_SetBlock(tag, &((U8*)data)[0], 2); //id
+ swf_SetBlock(tag, tables_tag->data, tables_tag->len);
+ swf_SetBlock(tag, &((U8*)data)[2], len-2);
+ free(data);
+ }
+ tag = tag->next;
+ }
+ if (swf->firstTag == tables_tag)
+ swf->firstTag = tables_tag->next;
+ swf_DeleteTag(swf, tables_tag);
+}
+
+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*)malloc((width>newwidth?width:newwidth)*2*sizeof(scale_lookup_t));
+ scale_lookup_t**lblockx = (scale_lookup_t**)malloc((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(RGBA*data, int width, int height, RGBA*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(RGBA*data, int width, int height, RGBA*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;
+ }
+}
+
+static void blurImage(RGBA*src, int width, int height, int r)
+{
+ int e = 2; // r times e is the sampling interval
+ double*gauss = (double*)malloc(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*)malloc(r*e*sizeof(int));
+ for(x=0;x<r*e;x++) {
+ weights[x] = (int)(gauss[x]*65536.0001/sum);
+ }
+ int range = r*e/2;
+
+ RGBA*tmp = malloc(sizeof(RGBA)*width*height);
+
+ int y;
+ for(y=0;y<height;y++) {
+ RGBA*s = &src[y*width];
+ RGBA*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++) {
+ RGBA*s = &tmp[x];
+ RGBA*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;
+ }
+ }
+
+ free(tmp);
+ free(weights);
+ free(gauss);
+}
+
+
+RGBA* swf_ImageScale(RGBA*data, int width, int height, int newwidth, int newheight)
+{
+ int x,y;
+ RGBA* newdata;
+ scale_lookup_t *p, **lblockx,**lblocky;
+ rgba_int_t*tmpline;
+ int monochrome = 0;
+ RGBA monochrome_colors[2];
+
+ if(newwidth<1 || newheight<1)
+ return 0;
+
+ 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*)malloc(width*sizeof(rgba_int_t));
+ newdata = (RGBA*)malloc(newwidth*newheight*sizeof(RGBA));
+
+ 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++) {
+ RGBA*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++) {
+ RGBA*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);
+
+ free(tmpline);
+ free(*lblockx);
+ free(lblockx);
+ free(*lblocky);
+ free(lblocky);
+ return newdata;
+}
+