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authorMartin Schröder <martin@oneiros.de>2008-03-24 15:47:15 +0000
committerMartin Schröder <martin@oneiros.de>2008-03-24 15:47:15 +0000
commit0b5550c241229764120d133af80a0cbab5937ddd (patch)
tree81309c18d6f0deba7407813cf15b9add2db375d1 /Build/source/texk/web2c/luatexdir/image/writepng.c
parent51f55df6a36ce376952a1f2b30bdb4dd0e06548d (diff)
First step of importing luatex (up to r1121)
git-svn-id: svn://tug.org/texlive/trunk@7124 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/texk/web2c/luatexdir/image/writepng.c')
-rw-r--r--Build/source/texk/web2c/luatexdir/image/writepng.c635
1 files changed, 635 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/luatexdir/image/writepng.c b/Build/source/texk/web2c/luatexdir/image/writepng.c
new file mode 100644
index 00000000000..7f1269d9943
--- /dev/null
+++ b/Build/source/texk/web2c/luatexdir/image/writepng.c
@@ -0,0 +1,635 @@
+/*
+Copyright (c) 1996-2004 Han The Thanh, <thanh@pdftex.org>
+
+This file is part of pdfTeX.
+
+pdfTeX 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.
+
+pdfTeX 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 pdfTeX; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+$Id: writepng.c 1101 2008-03-09 16:12:15Z hhenkel $
+*/
+
+#include <assert.h>
+#include "ptexlib.h"
+#include "image.h"
+
+void close_and_cleanup_png(image_dict * idict)
+{
+ assert(idict != NULL);
+ assert(img_file(idict) != NULL);
+ assert(img_filepath(idict) != NULL);
+ xfclose(img_file(idict), img_filepath(idict));
+ img_file(idict) = NULL;
+ assert(img_png_ptr(idict) != NULL);
+ png_destroy_read_struct(&(img_png_png_ptr(idict)),
+ &(img_png_info_ptr(idict)), NULL);
+ xfree(img_png_ptr(idict));
+ img_png_ptr(idict) = NULL;
+}
+
+void read_png_info(image_dict * idict, img_readtype_e readtype)
+{
+ double gamma;
+ png_structp png_p;
+ png_infop info_p;
+ assert(idict != NULL);
+ assert(img_type(idict) == IMAGE_TYPE_PNG);
+ img_totalpages(idict) = 1;
+ img_pagenum(idict) = 1;
+ img_xres(idict) = img_yres(idict) = 0;
+ assert(img_file(idict) == NULL);
+ img_file(idict) = xfopen(img_filepath(idict), FOPEN_RBIN_MODE);
+ assert(img_png_ptr(idict) == NULL);
+ img_png_ptr(idict) = xtalloc(1, png_img_struct);
+ if ((png_p = png_create_read_struct(PNG_LIBPNG_VER_STRING,
+ NULL, NULL, NULL)) == NULL)
+ pdftex_fail("libpng: png_create_read_struct() failed");
+ img_png_png_ptr(idict) = png_p;
+ if ((info_p = png_create_info_struct(png_p)) == NULL)
+ pdftex_fail("libpng: png_create_info_struct() failed");
+ img_png_info_ptr(idict) = info_p;
+ if (setjmp(png_p->jmpbuf))
+ pdftex_fail("libpng: internal error");
+ png_init_io(png_p, img_file(idict));
+ png_read_info(png_p, info_p);
+ /* simple transparency support */
+ if (png_get_valid(png_p, info_p, PNG_INFO_tRNS)) {
+ png_set_tRNS_to_alpha(png_p);
+ }
+ /* alpha channel support */
+ if (fixed_pdf_minor_version < 4 && png_p->color_type | PNG_COLOR_MASK_ALPHA)
+ png_set_strip_alpha(png_p);
+ /* 16bit depth support */
+ if (fixed_pdf_minor_version < 5)
+ fixed_image_hicolor = 0;
+ if (info_p->bit_depth == 16 && !fixed_image_hicolor)
+ png_set_strip_16(png_p);
+ /* gamma support */
+ if (fixed_image_apply_gamma) {
+ if (png_get_gAMA(png_p, info_p, &gamma))
+ png_set_gamma(png_p, (fixed_gamma / 1000.0), gamma);
+ else
+ png_set_gamma(png_p, (fixed_gamma / 1000.0),
+ (1000.0 / fixed_image_gamma));
+ }
+ /* reset structure */
+ png_read_update_info(png_p, info_p);
+ /* resolution support */
+ img_xsize(idict) = info_p->width;
+ img_ysize(idict) = info_p->height;
+ if (info_p->valid & PNG_INFO_pHYs) {
+ img_xres(idict) =
+ round(0.0254 * png_get_x_pixels_per_meter(png_p, info_p));
+ img_yres(idict) =
+ round(0.0254 * png_get_y_pixels_per_meter(png_p, info_p));
+ }
+ switch (info_p->color_type) {
+ case PNG_COLOR_TYPE_PALETTE:
+ img_color(idict) = IMAGE_COLOR_C | IMAGE_COLOR_I;
+ break;
+ case PNG_COLOR_TYPE_GRAY:
+ case PNG_COLOR_TYPE_GRAY_ALPHA:
+ img_color(idict) = IMAGE_COLOR_B;
+ break;
+ case PNG_COLOR_TYPE_RGB:
+ case PNG_COLOR_TYPE_RGB_ALPHA:
+ img_color(idict) = IMAGE_COLOR_C;
+ break;
+ default:
+ pdftex_fail("unsupported type of color_type <%i>", info_p->color_type);
+ }
+ img_colordepth(idict) = info_p->bit_depth;
+ if (readtype == IMG_CLOSEINBETWEEN)
+ close_and_cleanup_png(idict);
+}
+
+#define write_gray_pixel_16(r) \
+ if (j % 4 == 0||j % 4 == 1) pdf_buf[pdf_ptr++] = *r++; \
+ else smask[smask_ptr++] = *r++
+
+#define write_gray_pixel_8(r) \
+ if (j % 2 == 0) pdf_buf[pdf_ptr++] = *r++; \
+ else smask[smask_ptr++] = *r++
+
+
+#define write_rgb_pixel_16(r) \
+ if (!(j % 8 == 6||j % 8 == 7)) pdf_buf[pdf_ptr++] = *r++; \
+ else smask[smask_ptr++] = *r++
+
+#define write_rgb_pixel_8(r) \
+ if (j % 4 != 3) pdf_buf[pdf_ptr++] = *r++; \
+ else smask[smask_ptr++] = *r++
+
+#define write_simple_pixel(r) pdf_buf[pdf_ptr++] = *r++
+
+#define write_noninterlaced(outmac) \
+ for (i = 0; (unsigned) i < (int)info_p->height; i++) { \
+ png_read_row(png_p, row, NULL); \
+ r = row; \
+ k = info_p->rowbytes; \
+ while(k > 0) { \
+ l = (k > pdf_buf_size)? pdf_buf_size : k; \
+ pdfroom(l); \
+ for (j = 0; j < l; j++) { \
+ outmac; \
+ } \
+ k -= l; \
+ } \
+ }
+
+#define write_interlaced(outmac) \
+ for (i = 0; (unsigned) i < (int)info_p->height; i++) { \
+ row = rows[i]; \
+ k = info_p->rowbytes; \
+ while(k > 0) { \
+ l = (k > pdf_buf_size)? pdf_buf_size : k;\
+ pdfroom(l); \
+ for (j = 0; j < l; j++) { \
+ outmac; \
+ } \
+ k -= l; \
+ } \
+ xfree(rows[i]); \
+ }
+
+void write_png_palette(image_dict * idict)
+{
+ int i, j, k, l;
+ png_structp png_p = img_png_png_ptr(idict);
+ png_infop info_p = img_png_info_ptr(idict);
+ png_bytep row, r, *rows;
+ integer palette_objnum = 0;
+ if (img_colorspace(idict) != 0) {
+ pdf_printf("%i 0 R\n", (int) img_colorspace(idict));
+ } else {
+ pdf_create_obj(0, 0);
+ palette_objnum = obj_ptr;
+ pdf_printf("[/Indexed /DeviceRGB %i %i 0 R]\n",
+ (int) (info_p->num_palette - 1), (int) palette_objnum);
+ }
+ pdf_begin_stream();
+ if (info_p->interlace_type == PNG_INTERLACE_NONE) {
+ row = xtalloc(info_p->rowbytes, png_byte);
+ write_noninterlaced(write_simple_pixel(r));
+ xfree(row);
+ } else {
+ if (info_p->height * info_p->rowbytes >= 10240000L)
+ pdftex_warn
+ ("large interlaced PNG might cause out of memory (use non-interlaced PNG to fix this)");
+ rows = xtalloc(info_p->height, png_bytep);
+ for (i = 0; (unsigned) i < info_p->height; i++)
+ rows[i] = xtalloc(info_p->rowbytes, png_byte);
+ png_read_image(png_p, rows);
+ write_interlaced(write_simple_pixel(row));
+ xfree(rows);
+ }
+ pdf_end_stream();
+ if (palette_objnum > 0) {
+ pdf_begin_dict(palette_objnum, 0);
+ pdf_begin_stream();
+ for (i = 0; (unsigned) i < info_p->num_palette; i++) {
+ pdfroom(3);
+ pdf_buf[pdf_ptr++] = info_p->palette[i].red;
+ pdf_buf[pdf_ptr++] = info_p->palette[i].green;
+ pdf_buf[pdf_ptr++] = info_p->palette[i].blue;
+ }
+ pdf_end_stream();
+ }
+}
+
+void write_png_gray(image_dict * idict)
+{
+ int i, j, k, l;
+ png_structp png_p = img_png_png_ptr(idict);
+ png_infop info_p = img_png_info_ptr(idict);
+ png_bytep row, r, *rows;
+ if (img_colorspace(idict) != 0) {
+ pdf_printf("%i 0 R\n", (int) img_colorspace(idict));
+ } else {
+ pdf_puts("/DeviceGray\n");
+ }
+ pdf_begin_stream();
+ if (info_p->interlace_type == PNG_INTERLACE_NONE) {
+ row = xtalloc(info_p->rowbytes, png_byte);
+ write_noninterlaced(write_simple_pixel(r));
+ xfree(row);
+ } else {
+ if (info_p->height * info_p->rowbytes >= 10240000L)
+ pdftex_warn
+ ("large interlaced PNG might cause out of memory (use non-interlaced PNG to fix this)");
+ rows = xtalloc(info_p->height, png_bytep);
+ for (i = 0; (unsigned) i < info_p->height; i++)
+ rows[i] = xtalloc(info_p->rowbytes, png_byte);
+ png_read_image(png_p, rows);
+ write_interlaced(write_simple_pixel(row));
+ xfree(rows);
+ }
+ pdf_end_stream();
+}
+
+void write_png_gray_alpha(image_dict * idict)
+{
+ int i, j, k, l;
+ png_structp png_p = img_png_png_ptr(idict);
+ png_infop info_p = img_png_info_ptr(idict);
+ png_bytep row, r, *rows;
+ integer smask_objnum = 0;
+ png_bytep smask;
+ integer smask_ptr = 0;
+ integer smask_size = 0;
+ int bitdepth;
+ if (img_colorspace(idict) != 0) {
+ pdf_printf("%i 0 R\n", (int) img_colorspace(idict));
+ } else {
+ pdf_puts("/DeviceGray\n");
+ }
+ pdf_create_obj(0, 0);
+ smask_objnum = obj_ptr;
+ pdf_printf("/SMask %i 0 R\n", (int) smask_objnum);
+ smask_size = (info_p->rowbytes / 2) * info_p->height;
+ smask = xtalloc(smask_size, png_byte);
+ pdf_begin_stream();
+ if (info_p->interlace_type == PNG_INTERLACE_NONE) {
+ row = xtalloc(info_p->rowbytes, png_byte);
+ if ((info_p->bit_depth == 16) && fixed_image_hicolor) {
+ write_noninterlaced(write_gray_pixel_16(r));
+ } else {
+ write_noninterlaced(write_gray_pixel_8(r));
+ }
+ xfree(row);
+ } else {
+ if (info_p->height * info_p->rowbytes >= 10240000L)
+ pdftex_warn
+ ("large interlaced PNG might cause out of memory (use non-interlaced PNG to fix this)");
+ rows = xtalloc(info_p->height, png_bytep);
+ for (i = 0; (unsigned) i < info_p->height; i++)
+ rows[i] = xtalloc(info_p->rowbytes, png_byte);
+ png_read_image(png_p, rows);
+ if ((info_p->bit_depth == 16) && fixed_image_hicolor) {
+ write_interlaced(write_gray_pixel_16(row));
+ } else {
+ write_interlaced(write_gray_pixel_8(row));
+ }
+ xfree(rows);
+ }
+ pdf_end_stream();
+ pdf_flush();
+ /* now write the Smask object */
+ bitdepth = (int) info_p->bit_depth;
+ pdf_begin_dict(smask_objnum, 0);
+ pdf_puts("/Type /XObject\n/Subtype /Image\n");
+ if (img_attr(idict) != NULL && strlen(img_attr(idict)) > 0)
+ pdf_printf("%s\n", img_attr(idict));
+ pdf_printf("/Width %i\n/Height %i\n/BitsPerComponent %i\n",
+ (int) info_p->width,
+ (int) info_p->height, (bitdepth == 16 ? 8 : bitdepth));
+ pdf_puts("/ColorSpace /DeviceGray\n");
+ pdf_begin_stream();
+ for (i = 0; i < smask_size; i++) {
+ if (i % 8 == 0)
+ pdfroom(8);
+ pdf_buf[pdf_ptr++] = smask[i];
+ if (bitdepth == 16)
+ i++;
+ }
+ pdf_end_stream();
+ xfree(smask);
+}
+
+void write_png_rgb(image_dict * idict)
+{
+ int i, j, k, l;
+ png_structp png_p = img_png_png_ptr(idict);
+ png_infop info_p = img_png_info_ptr(idict);
+ png_bytep row, r, *rows;
+ if (img_colorspace(idict) != 0) {
+ pdf_printf("%i 0 R\n", (int) img_colorspace(idict));
+ } else {
+ pdf_puts("/DeviceRGB\n");
+ }
+ pdf_begin_stream();
+ if (info_p->interlace_type == PNG_INTERLACE_NONE) {
+ row = xtalloc(info_p->rowbytes, png_byte);
+ write_noninterlaced(write_simple_pixel(r));
+ xfree(row);
+ } else {
+ if (info_p->height * info_p->rowbytes >= 10240000L)
+ pdftex_warn
+ ("large interlaced PNG might cause out of memory (use non-interlaced PNG to fix this)");
+ rows = xtalloc(info_p->height, png_bytep);
+ for (i = 0; (unsigned) i < info_p->height; i++)
+ rows[i] = xtalloc(info_p->rowbytes, png_byte);
+ png_read_image(png_p, rows);
+ write_interlaced(write_simple_pixel(row));
+ xfree(rows);
+ }
+ pdf_end_stream();
+}
+
+void write_png_rgb_alpha(image_dict * idict)
+{
+ int i, j, k, l;
+ png_structp png_p = img_png_png_ptr(idict);
+ png_infop info_p = img_png_info_ptr(idict);
+ png_bytep row, r, *rows;
+ integer smask_objnum = 0;
+ png_bytep smask;
+ integer smask_ptr = 0;
+ integer smask_size = 0;
+ int bitdepth;
+ if (img_colorspace(idict) != 0) {
+ pdf_printf("%i 0 R\n", (int) img_colorspace(idict));
+ } else {
+ pdf_puts("/DeviceRGB\n");
+ }
+ pdf_create_obj(0, 0);
+ smask_objnum = obj_ptr;
+ pdf_printf("/SMask %i 0 R\n", (int) smask_objnum);
+ smask_size = (info_p->rowbytes / 2) * info_p->height;
+ smask = xtalloc(smask_size, png_byte);
+ pdf_begin_stream();
+ if (info_p->interlace_type == PNG_INTERLACE_NONE) {
+ row = xtalloc(info_p->rowbytes, png_byte);
+ if ((info_p->bit_depth == 16) && fixed_image_hicolor) {
+ write_noninterlaced(write_rgb_pixel_16(r));
+ } else {
+ write_noninterlaced(write_rgb_pixel_8(r));
+ }
+ xfree(row);
+ } else {
+ if (info_p->height * info_p->rowbytes >= 10240000L)
+ pdftex_warn
+ ("large interlaced PNG might cause out of memory (use non-interlaced PNG to fix this)");
+ rows = xtalloc(info_p->height, png_bytep);
+ for (i = 0; (unsigned) i < info_p->height; i++)
+ rows[i] = xtalloc(info_p->rowbytes, png_byte);
+ png_read_image(png_p, rows);
+ if ((info_p->bit_depth == 16) && fixed_image_hicolor) {
+ write_interlaced(write_rgb_pixel_16(row));
+ } else {
+ write_interlaced(write_rgb_pixel_8(row));
+ }
+ xfree(rows);
+ }
+ pdf_end_stream();
+ pdf_flush();
+ /* now write the Smask object */
+ if (smask_objnum > 0) {
+ bitdepth = (int) info_p->bit_depth;
+ pdf_begin_dict(smask_objnum, 0);
+ pdf_puts("/Type /XObject\n/Subtype /Image\n");
+ if (img_attr(idict) != NULL)
+ pdf_printf("%s\n", img_attr(idict));
+ pdf_printf("/Width %i\n/Height %i\n/BitsPerComponent %i\n",
+ (int) info_p->width,
+ (int) info_p->height, (bitdepth == 16 ? 8 : bitdepth));
+ pdf_puts("/ColorSpace /DeviceGray\n");
+ pdf_begin_stream();
+ for (i = 0; i < smask_size; i++) {
+ if (i % 8 == 0)
+ pdfroom(8);
+ pdf_buf[pdf_ptr++] = smask[i];
+ if (bitdepth == 16)
+ i++;
+ }
+ xfree(smask);
+ pdf_end_stream();
+ }
+}
+
+/**********************************************************************/
+/*
+ * The |copy_png| function is from Hartmut Henkel. The goal is to use
+ * pdf's native FlateDecode support if that is possible.
+ *
+ * Only a subset of the png files allows this, but when possible it
+ * greatly improves inclusion speed.
+ *
+ * Code cheerfully gleaned from Thomas Merz' PDFlib,
+ * file p_png.c "SPNG - Simple PNG"
+ */
+
+static int spng_getint(FILE * fp)
+{
+ unsigned char buf[4];
+ if (fread(buf, 1, 4, fp) != 4)
+ pdftex_fail("writepng: reading chunk type failed");
+ return ((((((int) buf[0] << 8) + buf[1]) << 8) + buf[2]) << 8) + buf[3];
+}
+
+#define SPNG_CHUNK_IDAT 0x49444154
+#define SPNG_CHUNK_IEND 0x49454E44
+
+void copy_png(image_dict * idict)
+{
+ assert(idict != NULL);
+ png_structp png_p = img_png_png_ptr(idict);
+ png_infop info_p = img_png_info_ptr(idict);
+ FILE *fp = (FILE *) png_p->io_ptr;
+ int i, len, type, streamlength = 0;
+ boolean endflag = false;
+ int idat = 0; /* flag to check continuous IDAT chunks sequence */
+ /* 1st pass to find overall stream /Length */
+ if (fseek(fp, 8, SEEK_SET) != 0)
+ pdftex_fail("writepng: fseek in PNG file failed");
+ do {
+ len = spng_getint(fp);
+ type = spng_getint(fp);
+ switch (type) {
+ case SPNG_CHUNK_IEND:
+ endflag = true;
+ break;
+ case SPNG_CHUNK_IDAT:
+ streamlength += len;
+ default:
+ if (fseek(fp, len + 4, SEEK_CUR) != 0)
+ pdftex_fail("writepng: fseek in PNG file failed");
+ }
+ } while (endflag == false);
+ pdf_printf("/Length %d\n", streamlength);
+ pdf_printf("/Filter /FlateDecode\n");
+ pdf_printf("/DecodeParms << ");
+ pdf_printf("/Colors %d ", info_p->color_type == 2 ? 3 : 1);
+ pdf_printf("/Columns %d ", (int) info_p->width);
+ pdf_printf("/BitsPerComponent %i ", (int) info_p->bit_depth);
+ pdf_printf("/Predictor %d ", 10); /* actual predictor defined on line basis */
+ pdf_printf(">>\n>>\nstream\n");
+ /* 2nd pass to copy data */
+ endflag = false;
+ if (fseek(fp, 8, SEEK_SET) != 0)
+ pdftex_fail("writepng: fseek in PNG file failed");
+ do {
+ len = spng_getint(fp);
+ type = spng_getint(fp);
+ switch (type) {
+ case SPNG_CHUNK_IDAT: /* do copy */
+ if (idat == 2)
+ pdftex_fail("writepng: IDAT chunk sequence broken");
+ idat = 1;
+ while (len > 0) {
+ i = (len > pdf_buf_size) ? pdf_buf_size : len;
+ pdfroom(i);
+ fread(&pdf_buf[pdf_ptr], 1, i, fp);
+ pdf_ptr += i;
+ len -= i;
+ }
+ if (fseek(fp, 4, SEEK_CUR) != 0)
+ pdftex_fail("writepng: fseek in PNG file failed");
+ break;
+ case SPNG_CHUNK_IEND: /* done */
+ pdf_end_stream();
+ endflag = true;
+ break;
+ default:
+ if (idat == 1)
+ idat = 2;
+ if (fseek(fp, len + 4, SEEK_CUR) != 0)
+ pdftex_fail("writepng: fseek in PNG file failed");
+ }
+ } while (endflag == false);
+}
+
+void reopen_png(image_dict * idict)
+{
+ integer width, height, xres, yres;
+ width = img_xsize(idict); /* do consistency check */
+ height = img_ysize(idict);
+ xres = img_xres(idict);
+ yres = img_yres(idict);
+ read_png_info(idict, IMG_KEEPOPEN);
+ if (width != img_xsize(idict) || height != img_ysize(idict)
+ || xres != img_xres(idict) || yres != img_yres(idict))
+ pdftex_fail("writepng: image dimensions have changed");
+}
+
+void write_png(image_dict * idict)
+{
+ double gamma, checked_gamma;
+ int i;
+ integer palette_objnum = 0;
+ assert(idict != NULL);
+ if (img_file(idict) == NULL)
+ reopen_png(idict);
+ assert(img_png_ptr(idict) != NULL);
+ png_structp png_p = img_png_png_ptr(idict);
+ png_infop info_p = img_png_info_ptr(idict);
+ if (fixed_pdf_minor_version < 5)
+ fixed_image_hicolor = 0;
+ pdf_puts("/Type /XObject\n/Subtype /Image\n");
+ if (img_attr(idict) != NULL && strlen(img_attr(idict)) > 0)
+ pdf_printf("%s\n", img_attr(idict));
+ pdf_printf("/Width %i\n/Height %i\n/BitsPerComponent %i\n",
+ (int) info_p->width,
+ (int) info_p->height, (int) info_p->bit_depth);
+ pdf_puts("/ColorSpace ");
+ checked_gamma = 1.0;
+ if (fixed_image_apply_gamma) {
+ if (png_get_gAMA(png_p, info_p, &gamma)) {
+ checked_gamma = (fixed_gamma / 1000.0) * gamma;
+ } else {
+ checked_gamma =
+ (fixed_gamma / 1000.0) * (1000.0 / fixed_image_gamma);
+ }
+ }
+ /* the switching between |info_p| and |png_p| queries has been trial and error.
+ */
+ if (fixed_pdf_minor_version > 1 && info_p->interlace_type == PNG_INTERLACE_NONE && (png_p->transformations == 0 || png_p->transformations == 0x2000) /* gamma */
+ &&!(png_p->color_type == PNG_COLOR_TYPE_GRAY_ALPHA ||
+ png_p->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
+ && (fixed_image_hicolor || (png_p->bit_depth <= 8))
+ && (checked_gamma <= 1.01 && checked_gamma > 0.99)
+ ) {
+ if (img_colorspace(idict) != 0) {
+ pdf_printf("%i 0 R\n", (int) img_colorspace(idict));
+ } else {
+ switch (info_p->color_type) {
+ case PNG_COLOR_TYPE_PALETTE:
+ pdf_create_obj(0, 0);
+ palette_objnum = obj_ptr;
+ pdf_printf("[/Indexed /DeviceRGB %i %i 0 R]\n",
+ (int) (info_p->num_palette - 1),
+ (int) palette_objnum);
+ break;
+ case PNG_COLOR_TYPE_GRAY:
+ pdf_puts("/DeviceGray\n");
+ break;
+ default: /* RGB */
+ pdf_puts("/DeviceRGB\n");
+ };
+ }
+ if (tracefilenames)
+ tex_printf(" (PNG copy)");
+ copy_png(idict);
+ if (palette_objnum > 0) {
+ pdf_begin_dict(palette_objnum, 0);
+ pdf_begin_stream();
+ for (i = 0; (unsigned) i < info_p->num_palette; i++) {
+ pdfroom(3);
+ pdf_buf[pdf_ptr++] = info_p->palette[i].red;
+ pdf_buf[pdf_ptr++] = info_p->palette[i].green;
+ pdf_buf[pdf_ptr++] = info_p->palette[i].blue;
+ }
+ pdf_end_stream();
+ }
+ } else {
+ if (0) {
+ tex_printf(" PNG copy skipped because: ");
+ if (fixed_image_apply_gamma &&
+ (checked_gamma > 1.01 || checked_gamma < 0.99))
+ tex_printf("gamma delta=%lf ", checked_gamma);
+ if (png_p->transformations != PNG_TRANSFORM_IDENTITY)
+ tex_printf("transform=%lu", (long) png_p->transformations);
+ if ((info_p->color_type != PNG_COLOR_TYPE_GRAY)
+ && (info_p->color_type != PNG_COLOR_TYPE_RGB)
+ && (info_p->color_type != PNG_COLOR_TYPE_PALETTE))
+ tex_printf("colortype ");
+ if (fixed_pdf_minor_version <= 1)
+ tex_printf("version=%d ", (int) fixed_pdf_minor_version);
+ if (info_p->interlace_type != PNG_INTERLACE_NONE)
+ tex_printf("interlaced ");
+ if (info_p->bit_depth > 8)
+ tex_printf("bitdepth=%d ", info_p->bit_depth);
+ if (png_get_valid(png_p, info_p, PNG_INFO_tRNS))
+ tex_printf("simple transparancy ");
+ }
+ switch (info_p->color_type) {
+ case PNG_COLOR_TYPE_PALETTE:
+ write_png_palette(idict);
+ break;
+ case PNG_COLOR_TYPE_GRAY:
+ write_png_gray(idict);
+ break;
+ case PNG_COLOR_TYPE_GRAY_ALPHA:
+ if (fixed_pdf_minor_version >= 4)
+ write_png_gray_alpha(idict);
+ else
+ write_png_gray(idict);
+ break;
+ case PNG_COLOR_TYPE_RGB:
+ write_png_rgb(idict);
+ break;
+ case PNG_COLOR_TYPE_RGB_ALPHA:
+ if (fixed_pdf_minor_version >= 4)
+ write_png_rgb_alpha(idict);
+ else
+ write_png_rgb(idict);
+ break;
+ default:
+ pdftex_fail("unsupported type of color_type <%i>",
+ info_p->color_type);
+ }
+ }
+ pdf_flush();
+ close_and_cleanup_png(idict);
+}