+/* gif2swf.c
+
+ GIF to SWF converter tool
+
+ Copyright (c) 2005 Daichi Shinozaki <dseg@shield.jp>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <zlib.h>
+#include <gif_lib.h>
+#include "../lib/rfxswf.h"
+#include "../lib/args.h"
+
+#define MAX_INPUT_FILES 1024
+#define VERBOSE(x) (global.verbose>=x)
+
+#define PROGRAM_NAME "gif2swf"
+
+struct {
+ float framerate;
+ int max_image_width;
+ int max_image_height;
+ int force_width;
+ int force_height;
+ int nfiles;
+ int verbose;
+ int do_cgi;
+ int version;
+ char *outfile;
+} global;
+
+struct {
+ char *filename;
+} image[MAX_INPUT_FILES];
+
+struct gif_header {
+ int width;
+ int height;
+};
+
+// Get transparency color from graphic extension block
+//
+// Return: transparency color or -1
+
+int getTransparentColor(GifFileType * gft)
+{
+ int i;
+ ExtensionBlock* ext = gft->SavedImages[0].ExtensionBlocks;
+
+ for (i=0; i < gft->SavedImages[0].ExtensionBlockCount; i++, ext++)
+ if ((ext->Function == GRAPHICS_EXT_FUNC_CODE) &&
+ (ext->Bytes[0] & 1)) { // there is a transparent color
+ return ext->Bytes[3] == 0 ?
+ 255 : // exception
+ ext->Bytes[3];
+ }
+
+ return -1;
+}
+
+TAG *MovieStart(SWF * swf, float framerate, int dx, int dy)
+{
+ TAG *t;
+ RGBA rgb;
+
+ memset(swf, 0x00, sizeof(SWF));
+
+ swf->fileVersion = global.version;
+ swf->frameRate = (int)(256.0 * framerate);
+ swf->movieSize.xmax = dx * 20;
+ swf->movieSize.ymax = dy * 20;
+
+ t = swf->firstTag = swf_InsertTag(NULL, ST_SETBACKGROUNDCOLOR);
+
+ rgb.r = rgb.g = rgb.b = rgb.a = 0x00;
+
+ //rgb.g = 0xff; //<--- handy for testing alpha conversion
+ swf_SetRGB(t, &rgb);
+
+ return t;
+}
+
+int MovieFinish(SWF * swf, TAG * t, char *sname)
+{
+ int f, so = fileno(stdout);
+ t = swf_InsertTag(t, ST_END);
+
+ if ((!isatty(so)) && (!sname))
+ f = so;
+ else {
+ if (!sname)
+ sname = "output.swf";
+ f = open(sname,O_WRONLY|O_CREAT|O_TRUNC|O_BINARY, 0644);
+ }
+
+ if(global.do_cgi) {
+ if FAILED(swf_WriteCGI(swf)) fprintf(stderr,"WriteCGI() failed.\n");
+ } else {
+ if(global.version >= 6) {
+ if (swf_WriteSWC(f, swf)<0)
+ fprintf(stderr, "Unable to write output file: %s\n", sname);
+ } else {
+ if (swf_WriteSWF(f, swf)<0)
+ fprintf(stderr, "Unable to write output file: %s\n", sname);
+ }
+ if (f != so)
+ close(f);
+ }
+
+ swf_FreeTags(swf);
+ return 0;
+}
+
+TAG *MovieAddFrame(SWF * swf, TAG * t, char *sname, int id)
+{
+ SHAPE *s;
+ SRECT r;
+ MATRIX m;
+ int fs;
+
+ U8 *imagedata, *from, *to;
+ RGBA* pal;
+
+ struct gif_header header;
+
+ int i, j, bgcolor, numcolors = 0, alphapalette = 0;
+ int bpp; // byte per pixel
+ int swf_width, padlen;
+
+ ColorMapObject* colormap;
+ GifColorType c;
+ int interlacedOffset[] = { 0, 4, 2, 1 }; // The way Interlaced image should
+ int interlacedJumps[] = { 8, 8, 4, 2 }; // be read - offsets and jumps...
+
+ FILE *fi;
+ GifFileType* gft;
+
+ if ((fi = fopen(sname, "rb")) == NULL) {
+ if (VERBOSE(1))
+ fprintf(stderr, "Read access failed: %s\n", sname);
+ return t;
+ }
+
+ if((gft = DGifOpenFileName(sname)) == NULL) {
+ fprintf(stderr, "%s is not a GIF file!\n", sname);
+ return t;
+ }
+ if(DGifSlurp(gft) != GIF_OK) {
+ PrintGifError();
+ return t;
+ }
+
+ header.width = gft->SWidth;
+ header.height = gft->SHeight;
+
+ pal = (RGBA*)malloc(256*sizeof(RGBA));
+ memset(pal,0,256*sizeof(RGBA));
+
+ // Local colormap has precedence over Global colormap
+ colormap = gft->Image.ColorMap ? gft->Image.ColorMap : gft->SColorMap;
+ numcolors = colormap->ColorCount;
+ alphapalette = getTransparentColor(gft);
+ bpp = (alphapalette >= 0 ? 4 : 3);
+
+ // bgColor is the background color to fill the bitmap with
+ // if an image is smaller than screen coordinates
+ if (gft->SColorMap) { // There is a GlobalColorMap
+ bgcolor = gft->SBackGroundColor; // The BackGroundColor is meaningful
+ } else {
+ if (alphapalette >= 0) // There is a transparency color
+ bgcolor = alphapalette; // set the bgColor to tranparent
+ else
+ bgcolor = 0; // Don't know what to do here.
+ // If this doesn't work, we could
+ // create a new color and set the
+ // alpha-channel to transparent
+ // (unless we are using all the 256
+ // colors, in which case either we
+ // give up, or move to 16-bits palette
+ }
+
+ for(i=0; i<numcolors; i++) {
+ c = colormap->Colors[i];
+ if(i == alphapalette)
+ pal[i].r = pal[i].g = pal[i].b = pal[i].a = 0; // Fully transparent
+ else {
+ pal[i].r = c.Red;
+ pal[i].g = c.Green;
+ pal[i].b = c.Blue;
+ pal[i].a = 255; // Fully opaque
+ }
+ }
+
+ if(alphapalette >= 0)
+ t = swf_InsertTag(t, ST_DEFINEBITSLOSSLESS2);
+ else
+ t = swf_InsertTag(t, ST_DEFINEBITSLOSSLESS);
+
+ swf_SetU16(t, id); // id
+
+ // Ah! The Flash specs says scanlines must be DWORD ALIGNED!
+ // (but image width is the correct number of pixels)
+ swf_width = BYTES_PER_SCANLINE(header.width);
+
+ if ((imagedata = (U8 *)malloc(swf_width*header.height)) == NULL) {
+ fprintf(stderr, "Failed to allocate memory required, aborted.");
+ exit(2);
+ }
+ to = imagedata;
+ from = (U8 *)gft->SavedImages[0].RasterBits;
+
+ if (swf_width == header.width) {
+ // we are all nicely aligned and don't need to move the bitmap around.
+ // Just copy the bits into the image buffer.*/
+ if (!gft->Image.Interlace)
+ memcpy(to, from, header.width*header.height);
+ else // Need to perform 4 passes on the interlaced images
+ for (i = 0; i < 4; i++)
+ for (j = interlacedOffset[i]; j < header.height;
+ j += interlacedJumps[i], from += header.width)
+ memcpy(to + header.width*j, from, header.width);
+ } else {
+ padlen = swf_width - header.width;
+
+ // here we need to pad the scanline
+ if (!gft->Image.Interlace) {
+ for (i=0; i < header.height; i++, from+=header.width, to+=swf_width) {
+ memcpy(to, from, header.width);
+ memset(to + header.width, bgcolor, padlen);
+ }
+ } else { // Need to perform 4 passes on the interlaced images
+ for (i = 0; i < 4; i++)
+ for (j = interlacedOffset[i]; j < header.height;
+ j += interlacedJumps[i], from += header.width) {
+ memcpy(to + swf_width*j, from, header.width);
+ memset(to + swf_width*j, bgcolor, padlen);
+ }
+ }
+ }
+
+ swf_SetLosslessBitsIndexed(t,header.width,header.height,imagedata,pal,256);
+ t = swf_InsertTag(t, ST_DEFINESHAPE);
+
+ swf_ShapeNew(&s);
+ swf_GetMatrix(NULL, &m);
+ m.sx = 20 * 0x10000;
+ m.sy = 20 * 0x10000;
+ fs = swf_ShapeAddBitmapFillStyle(s, &m, id, 0);
+
+ swf_SetU16(t, id + 1); // id
+
+ r.xmin = r.ymin = 0;
+ r.xmax = header.width * 20;
+ r.ymax = header.height * 20;
+ swf_SetRect(t, &r);
+
+ swf_SetShapeHeader(t, s);
+
+ swf_ShapeSetAll(t, s, 0, 0, 0, fs, 0);
+ swf_ShapeSetLine(t, s, r.xmax, 0);
+ swf_ShapeSetLine(t, s, 0, r.ymax);
+ swf_ShapeSetLine(t, s, -r.xmax, 0);
+ swf_ShapeSetLine(t, s, 0, -r.ymax);
+
+ swf_ShapeSetEnd(t);
+
+ t = swf_InsertTag(t, ST_PLACEOBJECT2);
+
+ swf_GetMatrix(NULL, &m);
+ m.tx = (swf->movieSize.xmax - (int) header.width * 20) / 2;
+ m.ty = (swf->movieSize.ymax - (int) header.height * 20) / 2;
+ swf_ObjectPlace(t, id + 1, 1, &m, NULL, NULL);
+
+ t = swf_InsertTag(t, ST_SHOWFRAME);
+
+ fclose(fi);
+ free(pal);
+ free(imagedata);
+ DGifCloseFile(gft);
+
+ return t;
+}
+
+
+int CheckInputFile(char *fname, char **realname)
+{
+ FILE *fi;
+ char *s = malloc(strlen(fname) + 5);
+ GifFileType* gft;
+
+ if (!s)
+ exit(2);
+ (*realname) = s;
+ strcpy(s, fname);
+
+ // Check whether file exists (with typical extensions)
+
+ if ((fi = fopen(s, "rb")) == NULL) {
+ sprintf(s, "%s.gif", fname);
+ if ((fi = fopen(s, "rb")) == NULL) {
+ sprintf(s, "%s.GIF", fname);
+ if ((fi = fopen(s, "rb")) == NULL) {
+ sprintf(s, "%s.Gif", fname);
+ if ((fi = fopen(s, "rb")) == NULL)
+ fprintf(stderr, "Couldn't open %s!\n", fname);
+ return -1;
+ }
+ }
+ }
+ fclose(fi);
+
+ if((gft = DGifOpenFileName(s)) == NULL) {
+ fprintf(stderr, "%s is not a GIF file!\n", fname);
+ return -1;
+ }
+ if(DGifSlurp(gft) != GIF_OK) {
+ PrintGifError();
+ return -1;
+ }
+
+ if (global.max_image_width < gft->SWidth)
+ global.max_image_width = gft->SWidth;
+ if (global.max_image_height < gft->SHeight)
+ global.max_image_height = gft->SHeight;
+
+ DGifCloseFile(gft);
+
+ return 0;
+}
+
+int args_callback_option(char *arg, char *val)
+{
+ int res = 0;
+ if (arg[1])
+ res = -1;
+ else
+ switch (arg[0]) {
+ case 'r':
+ if (val)
+ global.framerate = atof(val);
+ if ((global.framerate < 1.0/256) ||(global.framerate >= 256.0)) {
+ if (VERBOSE(1))
+ fprintf(stderr,
+ "Error: You must specify a valid framerate between 1/256 and 255.\n");
+ exit(1);
+ }
+ res = 1;
+ break;
+
+ case 'o':
+ if (val)
+ global.outfile = val;
+ res = 1;
+ break;
+
+ case 'z':
+ global.version = 6;
+ res = 0;
+ break;
+
+ case 'C':
+ global.do_cgi = 1;
+ break;
+
+ case 'v':
+ if (val)
+ global.verbose = atoi(val);
+ res = 1;
+ break;
+
+ case 'X':
+ if (val)
+ global.force_width = atoi(val);
+ res = 1;
+ break;
+
+ case 'Y':
+ if (val)
+ global.force_height = atoi(val);
+ res = 1;
+ break;
+
+ case 'V':
+ printf("gif2swf - part of %s %s\n", PACKAGE, VERSION);
+ exit(0);
+
+ default:
+ res = -1;
+ break;
+ }
+
+ if (res < 0) {
+ if (VERBOSE(1))
+ fprintf(stderr, "Unknown option: -%s\n", arg);
+ exit(1);
+ return 0;
+ }
+ return res;
+}
+
+static struct options_t options[] = {
+{"r", "rate"},
+{"o", "output"},
+{"z", "zlib"},
+{"X", "pixel"},
+{"Y", "pixel"},
+{"v", "verbose"},
+{"C", "cgi"},
+{"V", "version"},
+{0,0}
+};
+
+int args_callback_longoption(char *name, char *val)
+{
+ return args_long2shortoption(options, name, val);
+}
+
+int args_callback_command(char *arg, char *next) // actually used as filename
+{
+ char *s;
+ if (CheckInputFile(arg, &s) < 0) {
+ if (VERBOSE(1))
+ fprintf(stderr, "Error opening input file: %s\n", arg);
+ free(s);
+
+ } else {
+ image[global.nfiles].filename = s;
+ global.nfiles++;
+ if (global.nfiles >= MAX_INPUT_FILES) {
+ if (VERBOSE(1))
+ fprintf(stderr, "Error: Too many input files.\n");
+ exit(1);
+ }
+ }
+
+ return 0;
+}
+
+void args_callback_usage(char *name)
+{
+ printf("\n");
+ printf("Usage: %s [-X width] [-Y height] [-o file.swf] [-r rate] file1.gif [file2.gif...]\n", name);
+ printf("\n");
+ printf("-r , --rate <framerate> Set movie framerate (frames per second)\n");
+ printf("-o , --output <filename> Set name for SWF output file.\n");
+ printf("-z , --zlib <zlib> Enable Flash 6 (MX) Zlib Compression\n");
+ printf("-X , --pixel <width> Force movie width to <width> (default: autodetect)\n");
+ printf("-Y , --pixel <height> Force movie height to <height> (default: autodetect)\n");
+ printf("-v , --verbose <level> Set verbose level (0=quiet, 1=default, 2=debug)\n");
+ printf("-C , --cgi For use as CGI- prepend http header, write to stdout\n");
+ printf("-V , --version Print version information and exit\n");
+ printf("\n");
+}
+
+int main(int argc, char **argv)
+{
+ SWF swf;
+ TAG *t;
+
+ memset(&global, 0x00, sizeof(global));
+
+ global.framerate = 1.0;
+ global.verbose = 1;
+ global.version = 4;
+
+ processargs(argc, argv);
+
+ if(global.nfiles<=0) {
+ fprintf(stderr, "No gif files found in arguments\n");
+ return 1;
+ }
+
+ if (VERBOSE(2))
+ fprintf(stderr, "Processing %i file(s)...\n", global.nfiles);
+
+ t = MovieStart(&swf, global.framerate,
+ global.force_width ? global.force_width : global.max_image_width,
+ global.force_height ? global.force_height : global.max_image_height);
+ {
+ int i;
+ for (i = 0; i < global.nfiles; i++) {
+ if (VERBOSE(3))
+ fprintf(stderr, "[%03i] %s\n", i,
+ image[i].filename);
+ t = MovieAddFrame(&swf, t, image[i].filename, (i * 2) + 1);
+ free(image[i].filename);
+ }
+ }
+
+ MovieFinish(&swf, t, global.outfile);
+
+ return 0;
+}
git.asbjorn.biz / swftools.git / commitdiff