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This commit is contained in:
homm 2016-07-27 14:41:04 +03:00
parent 37841dbaeb
commit f8912a73e0
1 changed files with 26 additions and 21 deletions
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47
libImaging/PcxEncode.c
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@ -75,7 +75,7 @@ ImagingPcxEncode(Imaging im, ImagingCodecState state, UINT8* buf, int bytes)
(UINT8*) im->image[state->y + state->yoff] +
state->xoff * im->pixelsize, state->xsize);
state->y++;
state->y += 1;
state->count = 1;
state->LAST = state->buffer[0];
@ -103,22 +103,23 @@ ImagingPcxEncode(Imaging im, ImagingCodecState state, UINT8* buf, int bytes)
if (state->count == 63) {
/* this run is full; flush it */
if (bytes < 2)
if (bytes < 2) {
return ptr - buf;
*ptr++ = 0xff;
*ptr++ = state->LAST;
}
ptr[0] = 0xff;
ptr[1] = state->LAST;
ptr += 2;
bytes -= 2;
state->count = 0;
}
this = state->buffer[state->x];
if (this == state->LAST) {
/* extend the current run */
state->x++;
state->count++;
state->x += 1;
state->count += 1;
} else {
/* start a new run */
@ -126,15 +127,17 @@ ImagingPcxEncode(Imaging im, ImagingCodecState state, UINT8* buf, int bytes)
if (bytes < 1) {
return ptr - buf;
}
*ptr++ = state->LAST;
bytes--;
ptr[0] = state->LAST;
ptr += 1;
bytes -= 1;
} else {
if (state->count > 0) {
if (bytes < 2) {
return ptr - buf;
}
*ptr++ = 0xc0 | state->count;
*ptr++ = state->LAST;
ptr[0] = 0xc0 | state->count;
ptr[1] = state->LAST;
ptr += 2;
bytes -= 2;
}
}
@ -142,8 +145,7 @@ ImagingPcxEncode(Imaging im, ImagingCodecState state, UINT8* buf, int bytes)
state->LAST = this;
state->count = 1;
state->x++;
state->x += 1;
}
}
@ -152,15 +154,17 @@ ImagingPcxEncode(Imaging im, ImagingCodecState state, UINT8* buf, int bytes)
if (bytes < 1 + padding) {
return ptr - buf;
}
*ptr++ = state->LAST;
bytes--;
ptr[0] = state->LAST;
ptr += 1;
bytes -= 1;
} else {
if (state->count > 0) {
if (bytes < 2 + padding) {
return ptr - buf;
}
*ptr++ = 0xc0 | state->count;
*ptr++ = state->LAST;
ptr[0] = 0xc0 | state->count;
ptr[1] = state->LAST;
ptr += 2;
bytes -= 2;
}
}
@ -168,15 +172,16 @@ ImagingPcxEncode(Imaging im, ImagingCodecState state, UINT8* buf, int bytes)
return ptr - buf;
}
/* add the padding */
for (i=0;i<padding;i++){
*ptr++=0;
bytes--;
for (i = 0; i < padding; i++) {
ptr[0] = 0;
ptr += 1;
bytes -= 1;
}
/* reset for the next color plane. */
if (state->x < planes * bytes_per_line) {
state->count = 1;
state->LAST = state->buffer[state->x];
state->x++;
state->x += 1;
}
}
/* read next line */