-/* -*- mode: c; tab-width: 4; -*- [for (x)emacs]
- gif2swf.c
+/* -*- mode: c; tab-width: 4; -*- ---------------------------[for (x)emacs]--
+ $Id: gif2swf.c,v 1.7 2008/02/08 11:43:12 kramm Exp $
GIF to SWF converter tool
- Copyleft (c) 2005 Daichi Shinozaki <dseg@shield.jp>
+ Part of the swftools package.
+
+ 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
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
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
-*/
+ This file is derived from png2swf.c */
#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"
+#define AS_FIRSTFRAME "if(!n) n=0;"
+#define AS_LASTFRAME "if(n<%d){n=n+1;gotoAndPlay(1);}else stop();"
struct {
float framerate;
int version;
char *outfile;
int imagecount;
+ int loopcount;
} global;
struct {
} image[MAX_INPUT_FILES];
struct gif_header {
- int width;
- int height;
+ int width;
+ int height;
};
-// Get transparency color from graphic extension block
-//
-// Return: transparency color or -1
+enum disposal_method {
+ NONE,
+ DO_NOT_DISPOSE,
+ RESTORE_TO_BGCOLOR,
+ RESTORE_TO_PREVIOUS
+};
+
+
+void SetFrameAction(TAG ** t, const char *src, int ver)
+{
+ ActionTAG *as;
+
+ as = swf_ActionCompile(src, ver);
+ if (!as)
+ fprintf(stderr, "Couldn't compile ActionScript\n");
+ else {
+ *t = swf_InsertTag(*t, ST_DOACTION);
+ swf_ActionSet(*t, as);
+ swf_ActionFree(as);
+ }
+}
-int getTransparentColor(GifFileType * gft)
+int getGifDisposalMethod(GifFileType * gft, int framenum)
{
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];
+ ExtensionBlock *ext = gft->SavedImages[framenum].ExtensionBlocks;
+
+ for (i = 0; i < gft->SavedImages[framenum].ExtensionBlockCount; i++, ext++)
+ if (ext->Function == GRAPHICS_EXT_FUNC_CODE)
+ return ((ext->Bytes[0] & 0x1C) >> 2);
+
+ return -1;
+}
+
+int getGifLoopCount(GifFileType * gft)
+{
+ int i, loop = -1;
+ ExtensionBlock *ext = gft->SavedImages[0].ExtensionBlocks;
+
+ for (i = 0; i < gft->SavedImages[0].ExtensionBlockCount; i++, ext++)
+ if (ext->Function == APPLICATION_EXT_FUNC_CODE) {
+ // info: http://semmix.pl/color/exgraf/eeg24.htm
+ if (ext->ByteCount == 11 &&
+ (strncmp(&ext->Bytes[0], "NETSCAPE2.0", 11) == 0 ||
+ strncmp(&ext->Bytes[0], "ANIMEXTS1.0", 11) == 0)) {
+ // check for the subblock
+ ext++;
+ if (ext->ByteCount != 3)
+ ext--;
+ else {
+ loop = GET16(&ext->Bytes[1]);
+ break;
+ }
+ }
+ }
+
+ return loop;
+}
+
+U16 getGifDelayTime(GifFileType * gft, int framenum)
+{
+ int i;
+ ExtensionBlock *ext = gft->SavedImages[framenum].ExtensionBlocks;
+
+ for (i = 0; i < gft->SavedImages[framenum].ExtensionBlockCount; i++, ext++)
+ if (ext->Function == GRAPHICS_EXT_FUNC_CODE)
+ return GET16(&ext->Bytes[1]);
+
+ return 0;
+}
+
+int getTransparentColor(GifFileType * gft, int framenum)
+{
+ int i;
+ ExtensionBlock *ext = gft->SavedImages[framenum].ExtensionBlocks;
+
+ // Get transparency color from graphic extension block
+ for (i = 0; i < gft->SavedImages[framenum].ExtensionBlockCount; i++, ext++)
+ if ((ext->Function == GRAPHICS_EXT_FUNC_CODE) && (ext->Bytes[0] & 1)) {
+ // there is a transparent color
+ return ext->Bytes[3] == 0 ? 0 : // exception
+ (U8) ext->Bytes[3]; // transparency color
}
return -1;
memset(swf, 0x00, sizeof(SWF));
swf->fileVersion = global.version;
- swf->frameRate = (int)(256.0 * framerate);
+ swf->frameRate = (int) (256.0 * framerate);
swf->movieSize.xmax = dx * 20;
swf->movieSize.ymax = dy * 20;
else {
if (!sname)
sname = "output.swf";
- f = open(sname, O_WRONLY|O_CREAT|O_TRUNC|O_BINARY, 0644);
+ 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");
+ 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 (swf_WriteSWF(f, swf) < 0)
+ fprintf(stderr, "Unable to write output file: %s\n", sname);
if (f != so)
close(f);
}
int fs;
U8 *imagedata, *from, *to;
- RGBA* pal;
+ GifImageDesc *img;
+ RGBA *pal;
struct gif_header header;
- int i, j, bgcolor, numcolors = 0, alphapalette = 0;
- int bpp; // byte per pixel
+ int i, j, numcolors, alphapalette;
+ U8 bgcolor;
+ int bpp; // byte per pixel
int swf_width, padlen;
- ColorMapObject* colormap;
+ 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...
+ int interlacedOffset[] = { 0, 4, 2, 1 }; // The way Interlaced image should
+ int interlacedJumps[] = { 8, 8, 4, 2 }; // be read - offsets and jumps...
+ U16 delay, depth;
+ int disposal;
+ char *as_lastframe;
+ GifFileType *gft;
FILE *fi;
- GifFileType* gft;
if ((fi = fopen(sname, "rb")) == NULL) {
if (VERBOSE(1))
fprintf(stderr, "Read access failed: %s\n", sname);
return t;
}
+ fclose(fi);
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.width = gft->SWidth;
header.height = gft->SHeight;
- pal = (RGBA*)malloc(256*sizeof(RGBA));
- memset(pal, 0, 256*sizeof(RGBA));
+ pal = (RGBA *) malloc(256 * sizeof(RGBA));
+ memset(pal, 0, 256 * sizeof(RGBA));
+
+ img = &gft->SavedImages[imgidx].ImageDesc;
// Local colormap has precedence over Global colormap
- colormap = gft->Image.ColorMap ? gft->Image.ColorMap : gft->SColorMap;
+ colormap = img->ColorMap ? img->ColorMap : gft->SColorMap;
numcolors = colormap->ColorCount;
- alphapalette = getTransparentColor(gft);
+ alphapalette = getTransparentColor(gft, imgidx);
+ if (VERBOSE(3))
+ fprintf(stderr, "transparent palette index => %d\n", alphapalette);
bpp = (alphapalette >= 0 ? 4 : 3);
// bgcolor is the background color to fill the bitmap
- // if DWORD-aligned imagebuffer is bigger than the actual image
- 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++) {
+ if (gft->SColorMap) // There is a GlobalColorMap
+ bgcolor = (U8) gft->SBackGroundColor; // The SBGColor 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
+ if (VERBOSE(3))
+ fprintf(stderr, "BG palette index => %u\n", bgcolor);
+
+ 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
+ if (i == bgcolor || 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
+ pal[i].a = 255; // Fully opaque
}
}
- if (alphapalette >= 0) // There is a transparency color
- t = swf_InsertTag(t, ST_DEFINEBITSLOSSLESS2);
- else
- t = swf_InsertTag(t, ST_DEFINEBITSLOSSLESS);
-
- swf_SetU16(t, id); // id
+ t = swf_InsertTag(t, bpp == 4 ? ST_DEFINEBITSLOSSLESS2 : 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) {
+ 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[imgidx].RasterBits;
+ from = (U8 *) gft->SavedImages[imgidx].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
+ if (header.width == img->Width && header.height == img->Height)
+ memcpy(to, from, header.width * header.height);
+ else { //small screen
+ for (i = 0; i < header.height; i++, to += header.width) {
+ memset(to, bgcolor, header.width);
+ if (i >= img->Top && i < img->Top + img->Height) {
+ memcpy(to + img->Left, from, img->Width);
+ from += img->Width;
+ }
+ }
+ }
+
+ 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);
+ 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);
+ if (header.width == img->Width && header.height == img->Height) {
+ 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 { //small screen
+ for (i = 0; i < header.height; i++, to += swf_width) {
+ memset(to, bgcolor, swf_width);
+ if (i >= img->Top && i < img->Top + img->Height) {
+ memcpy(to + img->Left, from, img->Width);
+ from += img->Width;
+ }
+ }
}
- } else { // Need to perform 4 passes on the interlaced images
+ } 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);
+ 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);
+ swf_SetLosslessBitsIndexed(t, header.width, header.height, imagedata, pal, 256);
t = swf_InsertTag(t, ST_DEFINESHAPE);
m.sy = 20 * 0x10000;
fs = swf_ShapeAddBitmapFillStyle(s, &m, id, 0);
- swf_SetU16(t, id + 1); // id
+ swf_SetU16(t, id + 1); // id
r.xmin = r.ymin = 0;
r.xmax = header.width * 20;
swf_ShapeSetEnd(t);
- t = swf_InsertTag(t, ST_REMOVEOBJECT2);
- swf_SetU16(t, 1); // depth
+ depth = imgidx + 1;
+ if ((imgidx > 0) && // REMOVEOBJECT2 not needed at frame 1(imgidx==0)
+ (global.imagecount > 1)) {
+ // check last frame's disposal method
+ if ((disposal = getGifDisposalMethod(gft, imgidx - 1)) >= 0) {
+ switch (disposal) {
+ case NONE:
+ // [Replace one full-size, non-transparent frame with another]
+ t = swf_InsertTag(t, ST_REMOVEOBJECT2);
+ swf_SetU16(t, depth - 1);
+ if (VERBOSE(3))
+ fprintf(stdout, " [none]\n");
+ break;
+ case DO_NOT_DISPOSE:
+ // [Any pixels not covered up by the next frame continue to display]
+ if (VERBOSE(3))
+ fprintf(stdout, " [don't dispose]\n");
+ break;
+ case RESTORE_TO_BGCOLOR:
+ // [The background color or background tile -rather than a previous frame-
+ // shows through transparent pixels]
+ t = swf_InsertTag(t, ST_REMOVEOBJECT2);
+ swf_SetU16(t, depth - 2);
+ if (VERBOSE(3))
+ fprintf(stdout, " [restore to bg color]\n");
+ break;
+ case RESTORE_TO_PREVIOUS:
+ // [Restores to the state of a previous, undisposed frame]
+ // ** NOT IMPLEMENTED YET (same as "restore to bgcolor") **
+ t = swf_InsertTag(t, ST_REMOVEOBJECT2);
+ swf_SetU16(t, depth - 1);
+ if (VERBOSE(3))
+ fprintf(stdout, " [restore to previous]\n");
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ swf_SetU16(t, depth);
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);
+ swf_ObjectPlace(t, id + 1, depth, &m, NULL, NULL);
+
+ if ((global.imagecount > 1) && (global.loopcount > 0)) { // 0 means infinite loop
+ if (imgidx == 0)
+ SetFrameAction(&t, AS_FIRSTFRAME, global.version);
+ }
t = swf_InsertTag(t, ST_SHOWFRAME);
- fclose(fi);
+ if (global.imagecount > 1) { // multi-frame GIF?
+ int framecnt;
+ delay = getGifDelayTime(gft, imgidx); // delay in 1/100 sec
+ framecnt = (int) (global.framerate * (delay / 100.0));
+ if (framecnt > 1) {
+ if (VERBOSE(2))
+ fprintf(stderr, "at frame %d: pad %d frames(%.3f sec)\n",
+ imgidx + 1, framecnt, delay / 100.0);
+
+ framecnt -= 1; // already inserted a frame
+ while (framecnt--)
+ t = swf_InsertTag(t, ST_SHOWFRAME);
+ }
+ if ((imgidx == global.imagecount - 1) &&global.loopcount > 0) { // last frame
+ as_lastframe = malloc(strlen(AS_LASTFRAME) + 5); // 0-99999
+ sprintf(as_lastframe, AS_LASTFRAME, global.loopcount);
+ SetFrameAction(&t, as_lastframe, global.version);
+ if (as_lastframe)
+ free(as_lastframe);
+ }
+ }
+
free(pal);
free(imagedata);
DGifCloseFile(gft);
return t;
}
-
int CheckInputFile(char *fname, char **realname)
{
FILE *fi;
char *s = malloc(strlen(fname) + 5);
- GifFileType* gft;
+ GifFileType *gft;
if (!s)
exit(2);
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;
- global.imagecount = gft->ImageCount;
+ if (DGifSlurp(gft) != GIF_OK) {
+ PrintGifError();
+ return -1;
+ }
+ // After DGifSlurp() call, gft->ImageCount become available
+ if ((global.imagecount = gft->ImageCount) >1) {
+ if (global.loopcount < 0) {
+ global.loopcount = getGifLoopCount(gft);
+ if (VERBOSE(3))
+ fprintf(stderr, "Loops => %d\n", global.loopcount);
+ }
+ }
+ if (VERBOSE(2)) {
+ U8 i;
+ fprintf(stderr, "%d x %d, %d images total\n", gft->SWidth, gft->SHeight, gft->ImageCount);
+
+ for (i = 0; i < gft->ImageCount; i++)
+ fprintf(stderr, "frame: %u, delay: %.3f sec\n", i + 1, getGifDelayTime(gft, i) / 100.0);
+ }
DGifCloseFile(gft);
res = -1;
else
switch (arg[0]) {
+ case 'l':
+ if (val)
+ global.loopcount = atoi(val);
+ res = 1;
+ break;
+
case 'r':
if (val)
global.framerate = atof(val);
- if ((global.framerate < 1.0/256) ||(global.framerate >= 256.0)) {
+ 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");
}
res = 1;
break;
-
+
case 'o':
if (val)
global.outfile = val;
res = 1;
break;
-
+
case 'z':
global.version = 6;
res = 0;
{"r", "rate"},
{"o", "output"},
{"z", "zlib"},
+{"l", "loop"},
{"X", "pixel"},
{"Y", "pixel"},
{"v", "verbose"},
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("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("-l , --loop <loop count> Set loop count. (default: 0 [=infinite loop])\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");
global.framerate = 1.0;
global.verbose = 1;
- global.version = 4;
+ global.version = 5;
+ global.loopcount = -1;
processargs(argc, argv);
- if (global.nfiles<=0) {
+ 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);
- if (global.imagecount > 1) // multi-image GIF?
- global.framerate = 12.0; // default value(1.0) is not handy for animation GIFs
+ if (global.imagecount > 1) // multi-frame GIF?
+ if (global.framerate == 1.0) // user not specified '-r' option?
+ global.framerate = 10.0;
t = MovieStart(&swf, global.framerate,
- global.force_width ? global.force_width : global.max_image_width,
+ global.force_width ? global.force_width : global.max_image_width,
global.force_height ? global.force_height : global.max_image_height);
{
int i, j;
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, 0);
+ fprintf(stderr, "[%03i] %s\n", i, image[i].filename);
+ t = MovieAddFrame(&swf, t, image[i].filename, (i * 2) + 1, 0);
for (j = 2; j <= global.imagecount; j++)
- t = MovieAddFrame(&swf, t, image[i].filename, (j*2)-1, j-1);
+ t = MovieAddFrame(&swf, t, image[i].filename, (j * 2) - 1, j - 1);
free(image[i].filename);
}
}
git.asbjorn.biz / swftools.git / blobdiff