forked from AuroraMiddleware/gtk
s/lwz/lzw/g
1999-11-03 Jonathan Blandford <jrb@redhat.com> * src/io-gif.c (gif_prepare_lzw): s/lwz/lzw/g
This commit is contained in:
Jonathan Blandford
Jonathan Blandford
parent
3d5a2b1230
commit
a8ec2c3b9f
@ -522,7 +522,7 @@ main (int argc, char **argv)
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int nbytes;
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nbytes = fread(buf, 1, readlen, file);
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printf(".");
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//printf(".");
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fflush(stdout);
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if (gdk_pixbuf_loader_write (GDK_PIXBUF_LOADER (pixbuf_loader), buf, nbytes) == FALSE)
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@ -39,7 +39,7 @@
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#define CM_GREEN 1
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#define CM_BLUE 2
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#define MAX_LWZ_BITS 12
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#define MAX_LZW_BITS 12
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#define INTERLACE 0x40
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#define LOCALCOLORMAP 0x80
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@ -127,20 +127,20 @@ struct _GifContext
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int code_done;
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int code_last_byte;
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/* lwz context */
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gint lwz_fresh;
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gint lwz_code_size;
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guchar lwz_set_code_size;
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gint lwz_max_code;
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gint lwz_max_code_size;
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gint lwz_firstcode;
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gint lwz_oldcode;
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gint lwz_clear_code;
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gint lwz_end_code;
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gint *lwz_sp;
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/* lzw context */
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gint lzw_fresh;
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gint lzw_code_size;
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guchar lzw_set_code_size;
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gint lzw_max_code;
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gint lzw_max_code_size;
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gint lzw_firstcode;
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gint lzw_oldcode;
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gint lzw_clear_code;
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gint lzw_end_code;
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gint *lzw_sp;
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gint lwz_table[2][(1 << MAX_LWZ_BITS)];
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gint lwz_stack[(1 << (MAX_LWZ_BITS)) * 2 + 1];
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gint lzw_table[2][(1 << MAX_LZW_BITS)];
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gint lzw_stack[(1 << (MAX_LZW_BITS)) * 2 + 1];
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/* painting context */
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gint draw_xpos;
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@ -179,7 +179,7 @@ ReadOK (GifContext *context, guchar *buffer, size_t len)
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return retval;
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} else {
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#ifdef IO_GIFDEBUG
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g_print ("\tlooking for %d bytes. size == %d, ptr == %d\n", len, context->size, context->ptr);
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// g_print ("\tlooking for %d bytes. size == %d, ptr == %d\n", len, context->size, context->ptr);
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#endif
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if ((context->size - context->ptr) >= len) {
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count += len;
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@ -487,44 +487,44 @@ GetCode (GifContext *context,
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*/
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static int
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lwz_read_byte (GifContext *context)
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lzw_read_byte (GifContext *context)
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{
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int code, incode;
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gint retval;
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register int i;
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if (context->lwz_fresh) {
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context->lwz_fresh = FALSE;
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if (context->lzw_fresh) {
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context->lzw_fresh = FALSE;
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do {
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retval = GetCode (context, context->lwz_code_size);
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retval = GetCode (context, context->lzw_code_size);
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if (retval < 0) {
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return retval;
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}
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context->lwz_firstcode = context->lwz_oldcode = retval;
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} while (context->lwz_firstcode == context->lwz_clear_code);
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return context->lwz_firstcode;
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context->lzw_firstcode = context->lzw_oldcode = retval;
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} while (context->lzw_firstcode == context->lzw_clear_code);
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return context->lzw_firstcode;
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}
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if (context->lwz_sp > context->lwz_stack)
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return *--(context->lwz_sp);
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if (context->lzw_sp > context->lzw_stack)
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return *--(context->lzw_sp);
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while ((code = GetCode (context, context->lwz_code_size)) >= 0) {
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if (code == context->lwz_clear_code) {
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for (i = 0; i < context->lwz_clear_code; ++i) {
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context->lwz_table[0][i] = 0;
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context->lwz_table[1][i] = i;
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while ((code = GetCode (context, context->lzw_code_size)) >= 0) {
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if (code == context->lzw_clear_code) {
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for (i = 0; i < context->lzw_clear_code; ++i) {
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context->lzw_table[0][i] = 0;
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context->lzw_table[1][i] = i;
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}
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for (; i < (1 << MAX_LWZ_BITS); ++i)
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context->lwz_table[0][i] = context->lwz_table[1][i] = 0;
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context->lwz_code_size = context->lwz_set_code_size + 1;
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context->lwz_max_code_size = 2 * context->lwz_clear_code;
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context->lwz_max_code = context->lwz_clear_code + 2;
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context->lwz_sp = context->lwz_stack;
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context->lwz_firstcode = context->lwz_oldcode =
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GetCode (context, context->lwz_code_size);
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return context->lwz_firstcode;
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} else if (code == context->lwz_end_code) {
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for (; i < (1 << MAX_LZW_BITS); ++i)
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context->lzw_table[0][i] = context->lzw_table[1][i] = 0;
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context->lzw_code_size = context->lzw_set_code_size + 1;
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context->lzw_max_code_size = 2 * context->lzw_clear_code;
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context->lzw_max_code = context->lzw_clear_code + 2;
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context->lzw_sp = context->lzw_stack;
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context->lzw_firstcode = context->lzw_oldcode =
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GetCode (context, context->lzw_code_size);
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return context->lzw_firstcode;
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} else if (code == context->lzw_end_code) {
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int count;
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unsigned char buf[260];
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@ -544,38 +544,38 @@ lwz_read_byte (GifContext *context)
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incode = code;
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if (code >= context->lwz_max_code) {
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*(context->lwz_sp)++ = context->lwz_firstcode;
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code = context->lwz_oldcode;
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if (code >= context->lzw_max_code) {
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*(context->lzw_sp)++ = context->lzw_firstcode;
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code = context->lzw_oldcode;
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}
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while (code >= context->lwz_clear_code) {
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*(context->lwz_sp)++ = context->lwz_table[1][code];
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if (code == context->lwz_table[0][code]) {
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while (code >= context->lzw_clear_code) {
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*(context->lzw_sp)++ = context->lzw_table[1][code];
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if (code == context->lzw_table[0][code]) {
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/*g_message (_("GIF: circular table entry BIG ERROR\n"));*/
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/*gimp_quit ();*/
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return -2;
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}
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code = context->lwz_table[0][code];
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code = context->lzw_table[0][code];
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}
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*(context->lwz_sp)++ = context->lwz_firstcode = context->lwz_table[1][code];
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*(context->lzw_sp)++ = context->lzw_firstcode = context->lzw_table[1][code];
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if ((code = context->lwz_max_code) < (1 << MAX_LWZ_BITS)) {
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context->lwz_table[0][code] = context->lwz_oldcode;
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context->lwz_table[1][code] = context->lwz_firstcode;
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++context->lwz_max_code;
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if ((context->lwz_max_code >= context->lwz_max_code_size) &&
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(context->lwz_max_code_size < (1 << MAX_LWZ_BITS))) {
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context->lwz_max_code_size *= 2;
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++context->lwz_code_size;
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if ((code = context->lzw_max_code) < (1 << MAX_LZW_BITS)) {
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context->lzw_table[0][code] = context->lzw_oldcode;
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context->lzw_table[1][code] = context->lzw_firstcode;
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++context->lzw_max_code;
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if ((context->lzw_max_code >= context->lzw_max_code_size) &&
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(context->lzw_max_code_size < (1 << MAX_LZW_BITS))) {
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context->lzw_max_code_size *= 2;
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++context->lzw_code_size;
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}
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}
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context->lwz_oldcode = incode;
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context->lzw_oldcode = incode;
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if (context->lwz_sp > context->lwz_stack)
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return *--(context->lwz_sp);
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if (context->lzw_sp > context->lzw_stack)
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return *--(context->lzw_sp);
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}
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return code;
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}
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@ -660,7 +660,7 @@ gif_get_lzw (GifContext *context)
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dest = gdk_pixbuf_get_pixels (context->pixbuf);
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while (TRUE) {
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v = lwz_read_byte (context);
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v = lzw_read_byte (context);
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if (v < 0) {
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return v;
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}
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@ -738,30 +738,30 @@ gif_prepare_lzw (GifContext *context)
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{
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gint i;
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if (!ReadOK (context, &(context->lwz_set_code_size), 1)) {
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if (!ReadOK (context, &(context->lzw_set_code_size), 1)) {
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/*g_message (_("GIF: EOF / read error on image data\n"));*/
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return -1;
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}
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context->lwz_code_size = context->lwz_set_code_size + 1;
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context->lwz_clear_code = 1 << context->lwz_set_code_size;
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context->lwz_end_code = context->lwz_clear_code + 1;
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context->lwz_max_code_size = 2 * context->lwz_clear_code;
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context->lwz_max_code = context->lwz_clear_code + 2;
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context->lwz_fresh = TRUE;
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context->lzw_code_size = context->lzw_set_code_size + 1;
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context->lzw_clear_code = 1 << context->lzw_set_code_size;
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context->lzw_end_code = context->lzw_clear_code + 1;
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context->lzw_max_code_size = 2 * context->lzw_clear_code;
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context->lzw_max_code = context->lzw_clear_code + 2;
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context->lzw_fresh = TRUE;
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context->code_curbit = 0;
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context->code_lastbit = 0;
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context->code_last_byte = 0;
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context->code_done = FALSE;
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for (i = 0; i < context->lwz_clear_code; ++i) {
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context->lwz_table[0][i] = 0;
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context->lwz_table[1][i] = i;
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for (i = 0; i < context->lzw_clear_code; ++i) {
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context->lzw_table[0][i] = 0;
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context->lzw_table[1][i] = i;
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}
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for (; i < (1 << MAX_LWZ_BITS); ++i)
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context->lwz_table[0][i] = context->lwz_table[1][0] = 0;
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for (; i < (1 << MAX_LZW_BITS); ++i)
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context->lzw_table[0][i] = context->lzw_table[1][0] = 0;
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context->lwz_sp = context->lwz_stack;
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context->lzw_sp = context->lzw_stack;
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gif_set_get_lzw (context);
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return 0;
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