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-rw-r--r--Build/source/texk/web2c/pdftexdir/writejpg.c283
1 files changed, 146 insertions, 137 deletions
diff --git a/Build/source/texk/web2c/pdftexdir/writejpg.c b/Build/source/texk/web2c/pdftexdir/writejpg.c
index 1b01737e4e5..32778bb4eca 100644
--- a/Build/source/texk/web2c/pdftexdir/writejpg.c
+++ b/Build/source/texk/web2c/pdftexdir/writejpg.c
@@ -1,5 +1,5 @@
/*
-Copyright (c) 1996-2002 Han The Thanh, <thanh@pdftex.org>
+Copyright (c) 1996-2006 Han The Thanh, <thanh@pdftex.org>
This file is part of pdfTeX.
@@ -23,78 +23,78 @@ $Id: //depot/Build/source.development/TeX/texk/web2c/pdftexdir/writejpg.c#10 $
#include "ptexlib.h"
#include "image.h"
-#define JPG_GRAY 1 /* Gray color space, use /DeviceGray */
-#define JPG_RGB 3 /* RGB color space, use /DeviceRGB */
-#define JPG_CMYK 4 /* CMYK color space, use /DeviceCMYK */
-
-typedef enum { /* JPEG marker codes */
- M_SOF0 = 0xc0, /* baseline DCT */
- M_SOF1 = 0xc1, /* extended sequential DCT */
- M_SOF2 = 0xc2, /* progressive DCT */
- M_SOF3 = 0xc3, /* lossless (sequential) */
-
- M_SOF5 = 0xc5, /* differential sequential DCT */
- M_SOF6 = 0xc6, /* differential progressive DCT */
- M_SOF7 = 0xc7, /* differential lossless */
-
- M_JPG = 0xc8, /* JPEG extensions */
- M_SOF9 = 0xc9, /* extended sequential DCT */
- M_SOF10 = 0xca, /* progressive DCT */
- M_SOF11 = 0xcb, /* lossless (sequential) */
-
- M_SOF13 = 0xcd, /* differential sequential DCT */
- M_SOF14 = 0xce, /* differential progressive DCT */
- M_SOF15 = 0xcf, /* differential lossless */
-
- M_DHT = 0xc4, /* define Huffman tables */
-
- M_DAC = 0xcc, /* define arithmetic conditioning table */
-
- M_RST0 = 0xd0, /* restart */
- M_RST1 = 0xd1, /* restart */
- M_RST2 = 0xd2, /* restart */
- M_RST3 = 0xd3, /* restart */
- M_RST4 = 0xd4, /* restart */
- M_RST5 = 0xd5, /* restart */
- M_RST6 = 0xd6, /* restart */
- M_RST7 = 0xd7, /* restart */
-
- M_SOI = 0xd8, /* start of image */
- M_EOI = 0xd9, /* end of image */
- M_SOS = 0xda, /* start of scan */
- M_DQT = 0xdb, /* define quantization tables */
- M_DNL = 0xdc, /* define number of lines */
- M_DRI = 0xdd, /* define restart interval */
- M_DHP = 0xde, /* define hierarchical progression */
- M_EXP = 0xdf, /* expand reference image(s) */
-
- M_APP0 = 0xe0, /* application marker, used for JFIF */
- M_APP1 = 0xe1, /* application marker */
- M_APP2 = 0xe2, /* application marker */
- M_APP3 = 0xe3, /* application marker */
- M_APP4 = 0xe4, /* application marker */
- M_APP5 = 0xe5, /* application marker */
- M_APP6 = 0xe6, /* application marker */
- M_APP7 = 0xe7, /* application marker */
- M_APP8 = 0xe8, /* application marker */
- M_APP9 = 0xe9, /* application marker */
- M_APP10 = 0xea, /* application marker */
- M_APP11 = 0xeb, /* application marker */
- M_APP12 = 0xec, /* application marker */
- M_APP13 = 0xed, /* application marker */
- M_APP14 = 0xee, /* application marker, used by Adobe */
- M_APP15 = 0xef, /* application marker */
-
- M_JPG0 = 0xf0, /* reserved for JPEG extensions */
- M_JPG13 = 0xfd, /* reserved for JPEG extensions */
- M_COM = 0xfe, /* comment */
-
- M_TEM = 0x01, /* temporary use */
-
- M_ERROR = 0x100 /* dummy marker, internal use only */
+#define JPG_GRAY 1 /* Gray color space, use /DeviceGray */
+#define JPG_RGB 3 /* RGB color space, use /DeviceRGB */
+#define JPG_CMYK 4 /* CMYK color space, use /DeviceCMYK */
+
+typedef enum { /* JPEG marker codes */
+ M_SOF0 = 0xc0, /* baseline DCT */
+ M_SOF1 = 0xc1, /* extended sequential DCT */
+ M_SOF2 = 0xc2, /* progressive DCT */
+ M_SOF3 = 0xc3, /* lossless (sequential) */
+
+ M_SOF5 = 0xc5, /* differential sequential DCT */
+ M_SOF6 = 0xc6, /* differential progressive DCT */
+ M_SOF7 = 0xc7, /* differential lossless */
+
+ M_JPG = 0xc8, /* JPEG extensions */
+ M_SOF9 = 0xc9, /* extended sequential DCT */
+ M_SOF10 = 0xca, /* progressive DCT */
+ M_SOF11 = 0xcb, /* lossless (sequential) */
+
+ M_SOF13 = 0xcd, /* differential sequential DCT */
+ M_SOF14 = 0xce, /* differential progressive DCT */
+ M_SOF15 = 0xcf, /* differential lossless */
+
+ M_DHT = 0xc4, /* define Huffman tables */
+
+ M_DAC = 0xcc, /* define arithmetic conditioning table */
+
+ M_RST0 = 0xd0, /* restart */
+ M_RST1 = 0xd1, /* restart */
+ M_RST2 = 0xd2, /* restart */
+ M_RST3 = 0xd3, /* restart */
+ M_RST4 = 0xd4, /* restart */
+ M_RST5 = 0xd5, /* restart */
+ M_RST6 = 0xd6, /* restart */
+ M_RST7 = 0xd7, /* restart */
+
+ M_SOI = 0xd8, /* start of image */
+ M_EOI = 0xd9, /* end of image */
+ M_SOS = 0xda, /* start of scan */
+ M_DQT = 0xdb, /* define quantization tables */
+ M_DNL = 0xdc, /* define number of lines */
+ M_DRI = 0xdd, /* define restart interval */
+ M_DHP = 0xde, /* define hierarchical progression */
+ M_EXP = 0xdf, /* expand reference image(s) */
+
+ M_APP0 = 0xe0, /* application marker, used for JFIF */
+ M_APP1 = 0xe1, /* application marker */
+ M_APP2 = 0xe2, /* application marker */
+ M_APP3 = 0xe3, /* application marker */
+ M_APP4 = 0xe4, /* application marker */
+ M_APP5 = 0xe5, /* application marker */
+ M_APP6 = 0xe6, /* application marker */
+ M_APP7 = 0xe7, /* application marker */
+ M_APP8 = 0xe8, /* application marker */
+ M_APP9 = 0xe9, /* application marker */
+ M_APP10 = 0xea, /* application marker */
+ M_APP11 = 0xeb, /* application marker */
+ M_APP12 = 0xec, /* application marker */
+ M_APP13 = 0xed, /* application marker */
+ M_APP14 = 0xee, /* application marker, used by Adobe */
+ M_APP15 = 0xef, /* application marker */
+
+ M_JPG0 = 0xf0, /* reserved for JPEG extensions */
+ M_JPG13 = 0xfd, /* reserved for JPEG extensions */
+ M_COM = 0xfe, /* comment */
+
+ M_TEM = 0x01, /* temporary use */
+
+ M_ERROR = 0x100 /* dummy marker, internal use only */
} JPEG_MARKER;
-static JPG_UINT16 read2bytes(FILE *f)
+static JPG_UINT16 read2bytes(FILE * f)
{
int c = xgetc(f);
return (c << 8) + xgetc(f);
@@ -102,38 +102,47 @@ static JPG_UINT16 read2bytes(FILE *f)
void read_jpg_info(integer img)
{
- int i;
- char jpg_id[]="JFIF";
- int units=0;
- img_xres(img)=img_yres(img)=0;
+ int i, units = 0;
+ unsigned char jpg_id[] = "JFIF";
+ img_xres(img) = img_yres(img) = 0;
jpg_ptr(img)->file = xfopen(img_name(img), FOPEN_RBIN_MODE);
- xfseek(jpg_ptr(img)->file,0,SEEK_END,cur_file_name);
- jpg_ptr(img)->length=xftell(jpg_ptr(img)->file,cur_file_name);
- xfseek(jpg_ptr(img)->file,0,SEEK_SET,cur_file_name);
- if(read2bytes(jpg_ptr(img)->file)!=0xFFD8)
- pdftex_fail("reading JPEG image failed");
-
- if(read2bytes(jpg_ptr(img)->file)==0xFFE0) { /* JFIF APP0 */
- (void)read2bytes(jpg_ptr(img)->file);
- for(i=0;i<5;i++) if(xgetc(jpg_ptr(img)->file)!=jpg_id[i])
- pdftex_fail("reading JPEG image failed");
- (void)read2bytes(jpg_ptr(img)->file);
- units=xgetc(jpg_ptr(img)->file);
- img_xres(img)=read2bytes(jpg_ptr(img)->file);
- img_yres(img)=read2bytes(jpg_ptr(img)->file);
- switch(units) {
- case 1: break; /* pixels per inch */
- case 2: img_xres(img)*=2.54; img_yres(img)*=2.54;
- break; /* pixels per cm */
- default:img_xres(img)=img_yres(img)=0; break;
- }
+ xfseek(jpg_ptr(img)->file, 0, SEEK_END, cur_file_name);
+ jpg_ptr(img)->length = xftell(jpg_ptr(img)->file, cur_file_name);
+ xfseek(jpg_ptr(img)->file, 0, SEEK_SET, cur_file_name);
+ if (read2bytes(jpg_ptr(img)->file) != 0xFFD8)
+ pdftex_fail("reading JPEG image failed (no JPEG header found)");
+ /* currently only true JFIF files allow extracting img_xres and img_yres */
+ if (read2bytes(jpg_ptr(img)->file) == 0xFFE0) { /* check for JFIF */
+ (void) read2bytes(jpg_ptr(img)->file);
+ for (i = 0; i < 5; i++) {
+ if (xgetc(jpg_ptr(img)->file) != jpg_id[i])
+ break;
+ }
+ if (i == 5) { /* it's JFIF */
+ read2bytes(jpg_ptr(img)->file);
+ units = xgetc(jpg_ptr(img)->file);
+ img_xres(img) = read2bytes(jpg_ptr(img)->file);
+ img_yres(img) = read2bytes(jpg_ptr(img)->file);
+ switch (units) {
+ case 1:
+ break; /* pixels per inch */
+ case 2:
+ img_xres(img) *= 2.54;
+ img_yres(img) *= 2.54;
+ break; /* pixels per cm */
+ default:
+ img_xres(img) = img_yres(img) = 0;
+ break;
+ }
+ }
}
-
- xfseek(jpg_ptr(img)->file,0,SEEK_SET,cur_file_name);
- while(1) {
- if(feof(jpg_ptr(img)->file) || fgetc(jpg_ptr(img)->file)!=0xFF)
- pdftex_fail("reading JPEG image failed");
- switch(xgetc(jpg_ptr(img)->file)) {
+ xfseek(jpg_ptr(img)->file, 0, SEEK_SET, cur_file_name);
+ while (1) {
+ if (feof(jpg_ptr(img)->file))
+ pdftex_fail("reading JPEG image failed (premature file end)");
+ if (fgetc(jpg_ptr(img)->file) != 0xFF)
+ pdftex_fail("reading JPEG image failed (no marker found)");
+ switch (xgetc(jpg_ptr(img)->file)) {
case M_SOF5:
case M_SOF6:
case M_SOF7:
@@ -145,33 +154,33 @@ void read_jpg_info(integer img)
case M_SOF15:
pdftex_fail("unsupported type of compression");
case M_SOF2:
- if (fixedpdfminorversion <= 2)
- pdftex_fail("cannot use progressive DCT with PDF-1.2");
+ if (fixedpdfminorversion <= 2)
+ pdftex_fail("cannot use progressive DCT with PDF-1.2");
case M_SOF0:
case M_SOF1:
case M_SOF3:
- (void)read2bytes(jpg_ptr(img)->file); /* read segment length */
- jpg_ptr(img)->bits_per_component = xgetc(jpg_ptr(img)->file);
- img_height(img) = read2bytes(jpg_ptr(img)->file);
- img_width(img) = read2bytes(jpg_ptr(img)->file);
- jpg_ptr(img)->color_space = xgetc(jpg_ptr(img)->file);
- xfseek(jpg_ptr(img)->file,0,SEEK_SET,cur_file_name);
- switch (jpg_ptr(img)->color_space) {
- case JPG_GRAY:
- img_color(img) = IMAGE_COLOR_B;
- break;
- case JPG_RGB:
- img_color(img) = IMAGE_COLOR_C;
- break;
- case JPG_CMYK:
- img_color(img) = IMAGE_COLOR_C;
- break;
- default:
- pdftex_fail("Unsupported color space %i",
- (int)jpg_ptr(img)->color_space);
- }
- return;
- case M_SOI: /* ignore markers without parameters */
+ (void) read2bytes(jpg_ptr(img)->file); /* read segment length */
+ jpg_ptr(img)->bits_per_component = xgetc(jpg_ptr(img)->file);
+ img_height(img) = read2bytes(jpg_ptr(img)->file);
+ img_width(img) = read2bytes(jpg_ptr(img)->file);
+ jpg_ptr(img)->color_space = xgetc(jpg_ptr(img)->file);
+ xfseek(jpg_ptr(img)->file, 0, SEEK_SET, cur_file_name);
+ switch (jpg_ptr(img)->color_space) {
+ case JPG_GRAY:
+ img_color(img) = IMAGE_COLOR_B;
+ break;
+ case JPG_RGB:
+ img_color(img) = IMAGE_COLOR_C;
+ break;
+ case JPG_CMYK:
+ img_color(img) = IMAGE_COLOR_C;
+ break;
+ default:
+ pdftex_fail("Unsupported color space %i",
+ (int) jpg_ptr(img)->color_space);
+ }
+ return;
+ case M_SOI: /* ignore markers without parameters */
case M_EOI:
case M_TEM:
case M_RST0:
@@ -183,8 +192,9 @@ void read_jpg_info(integer img)
case M_RST6:
case M_RST7:
break;
- default: /* skip variable length markers */
- xfseek(jpg_ptr(img)->file,read2bytes(jpg_ptr(img)->file)-2,SEEK_CUR,cur_file_name);
+ default: /* skip variable length markers */
+ xfseek(jpg_ptr(img)->file, read2bytes(jpg_ptr(img)->file) - 2,
+ SEEK_CUR, cur_file_name);
break;
}
}
@@ -196,15 +206,14 @@ void write_jpg(integer img)
FILE *f;
pdf_puts("/Type /XObject\n/Subtype /Image\n");
pdf_printf("/Width %i\n/Height %i\n/BitsPerComponent %i\n/Length %i\n",
- img_width(img),
- img_height(img),
- (int)jpg_ptr(img)->bits_per_component,
- (int)jpg_ptr(img)->length);
+ (int) img_width(img),
+ (int) img_height(img),
+ (int) jpg_ptr(img)->bits_per_component,
+ (int) jpg_ptr(img)->length);
pdf_puts("/ColorSpace ");
if (img_colorspace_ref(img) != 0) {
- pdf_printf("%i 0 R\n", (int)img_colorspace_ref(img));
- }
- else {
+ pdf_printf("%i 0 R\n", (int) img_colorspace_ref(img));
+ } else {
switch (jpg_ptr(img)->color_space) {
case JPG_GRAY:
pdf_puts("/DeviceGray\n");
@@ -216,12 +225,12 @@ void write_jpg(integer img)
pdf_puts("/DeviceCMYK\n/Decode [1 0 1 0 1 0 1 0]\n");
break;
default:
- pdftex_fail("Unsupported color space %i",
- (int)jpg_ptr(img)->color_space);
+ pdftex_fail("Unsupported color space %i",
+ (int) jpg_ptr(img)->color_space);
}
}
pdf_puts("/Filter /DCTDecode\n>>\nstream\n");
for (l = jpg_ptr(img)->length, f = jpg_ptr(img)->file; l > 0; l--)
pdfout(xgetc(f));
- pdf_puts("endstream\nendobj\n");
+ pdfendstream();
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-16 22:31:26 +0000