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Add libpng support. Default to off. 

svn path=/trunk/netsurf/; revision=5330
This commit is contained in:
Daniel Silverstone 2008-09-15 20:23:02 +00:00
parent 5c9f7937f5
commit d3270ed648
9 changed files with 377 additions and 7 deletions
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3
Makefile
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@ -230,7 +230,8 @@ define pkg_config_find_and_add
endef
$(eval $(call feature_enabled,JPEG,-DWITH_JPEG,-ljpeg,JPEG support))
$(eval $(call feature_enabled,MNG,-DWITH_MNG,-lmng,PNG support))
$(eval $(call feature_enabled,MNG,-DWITH_MNG,-lmng,MNG support))
$(eval $(call feature_enabled,PNG,-DWITH_PNG,-lpng,PNG support))
$(eval $(call feature_enabled,HARU_PDF,-DWITH_PDF_EXPORT,-lhpdf -lpng,PDF export))
$(eval $(call feature_enabled,LIBICONV_PLUG,-DLIBICONV_PLUG,,glibc internal iconv))

6
Makefile.config
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@ -25,6 +25,12 @@ NETSURF_USE_JPEG := YES
# Valid options: YES, NO
NETSURF_USE_MNG := YES
# Enable NetSurf's use of libpng for displaying PNGs. If MNG and PNG
# are both enabled then NetSurf will choose libpng for PNGs, leaving
# MNGs and JNGs to libmng.
# Valid options: YES, NO
NETSURF_USE_PNG := NO
# Use libharu to enable PDF export and GTK printing support. There is no
# auto-detection available for this, as it does not have a pkg-config file.
# Valid options: YES, NO

2
Makefile.sources
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@ -24,7 +24,7 @@ S_COMMON := $(addprefix content/,$(S_CONTENT)) \
# S_IMAGE are sources related to image management
S_IMAGE := bmp.c gif.c ico.c jpeg.c \
mng.c nssprite.c svg.c rsvg.c
mng.c nssprite.c svg.c rsvg.c png.c
S_IMAGE := $(addprefix image/,$(S_IMAGE))
# S_PDF are sources of the pdf plotter + the ones for paged-printing

18
content/content.c
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@ -75,6 +75,9 @@
#ifdef WITH_ARTWORKS
#include "riscos/artworks.h"
#endif
#ifdef WITH_PNG
#include "image/png.h"
#endif
#include "utils/log.h"
#include "utils/messages.h"
#include "utils/talloc.h"
@ -144,7 +147,7 @@ static const struct mime_entry mime_map[] = {
#ifdef WITH_JPEG
{"image/pjpeg", CONTENT_JPEG},
#endif
#ifdef WITH_MNG
#if defined(WITH_MNG) || defined(WITH_PNG)
{"image/png", CONTENT_PNG},
#endif
#if defined(WITH_NS_SVG) || defined (WITH_RSVG)
@ -203,8 +206,10 @@ const char * const content_type_name[] = {
"BMP",
"ICO",
#endif
#ifdef WITH_MNG
#if defined(WITH_MNG) || defined(WITH_PNG)
"PNG",
#endif
#ifdef WITH_MNG
"JNG",
"MNG",
#endif
@ -289,10 +294,19 @@ static const struct handler_entry handler_map[] = {
{nsico_create, 0, nsico_convert, 0, nsico_destroy, 0,
nsico_redraw, nsico_redraw_tiled, 0, 0, false},
#endif
#ifdef WITH_PNG
{nspng_create, nspng_process_data, nspng_convert,
0, nspng_destroy, 0, nspng_redraw, nspng_redraw_tiled,
0, 0, false},
#else
#ifdef WITH_MNG
{nsmng_create, nsmng_process_data, nsmng_convert,
0, nsmng_destroy, 0, nsmng_redraw, nsmng_redraw_tiled,
0, 0, false},
#endif
#endif
#ifdef WITH_MNG
{nsmng_create, nsmng_process_data, nsmng_convert,
0, nsmng_destroy, 0, nsmng_redraw, nsmng_redraw_tiled,
0, 0, false},

10
content/content.h
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@ -26,6 +26,13 @@
#ifndef _NETSURF_DESKTOP_CONTENT_H_
#define _NETSURF_DESKTOP_CONTENT_H_
/* Irritatingly this must come first, or odd include errors
* will occur to do with setjmp.h.
*/
#ifdef WITH_PNG
#include "image/png.h"
#endif
#include <stdint.h>
#include "utils/config.h"
#include "content/content_type.h"
@ -207,6 +214,9 @@ struct content {
#endif
#ifdef WITH_RSVG
struct content_rsvg_data rsvg;
#endif
#ifdef WITH_PNG
struct content_png_data png;
#endif
} data;

4
image/jpeg.c
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@ -26,6 +26,9 @@
#include "utils/config.h"
#ifdef WITH_JPEG
/* This must come first due to libpng issues */
#include "content/content.h"
#include <assert.h>
#include <setjmp.h>
#include <string.h>
@ -33,7 +36,6 @@
#include <stdlib.h>
#define JPEG_INTERNAL_OPTIONS
#include "jpeglib.h"
#include "content/content.h"
#include "desktop/plotters.h"
#include "image/bitmap.h"
#include "image/jpeg.h"

4
image/mng.c
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@ -23,6 +23,9 @@
#include "utils/config.h"
#ifdef WITH_MNG
/* This must come first due to libpng issues */
#include "content/content.h"
#include <assert.h>
#include <stdbool.h>
#include <string.h>
@ -30,7 +33,6 @@
#include <sys/time.h>
#include <time.h>
#include <libmng.h>
#include "content/content.h"
#include "desktop/browser.h"
#include "desktop/options.h"
#include "desktop/plotters.h"

284
image/png.c Normal file
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@ -0,0 +1,284 @@
/*
* Copyright 2004 James Bursa <bursa@users.sourceforge.net>
* Copyright 2004 Richard Wilson <not_ginger_matt@hotmail.com>
* Copyright 2008 Daniel Silverstone <dsilvers@netsurf-browser.org>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf 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; version 2 of the License.
*
* NetSurf 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <stdbool.h>
#include <string.h>
#include <stdlib.h>
#include <libpng/png.h>
#include "utils/config.h"
#include "desktop/plotters.h"
#include "content/content.h"
#include "image/bitmap.h"
#include "utils/log.h"
#include "utils/messages.h"
#include "utils/utils.h"
#ifdef WITH_PNG
/* I hate doing this, but without g_strdup_printf or similar, we're a tad stuck. */
#define NSPNG_TITLE_LEN (100)
/* libpng uses names starting png_, so use nspng_ here to avoid clashes */
static void info_callback(png_structp png, png_infop info);
static void row_callback(png_structp png, png_bytep new_row,
png_uint_32 row_num, int pass);
static void end_callback(png_structp png, png_infop info);
bool nspng_create(struct content *c, const char *params[])
{
union content_msg_data msg_data;
c->data.png.png = png_create_read_struct(PNG_LIBPNG_VER_STRING,
0, 0, 0);
c->data.png.bitmap = NULL;
if (!c->data.png.png) {
msg_data.error = messages_get("NoMemory");
content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
warn_user("NoMemory", 0);
return false;
}
c->data.png.info = png_create_info_struct(c->data.png.png);
if (!c->data.png.info) {
png_destroy_read_struct(&c->data.png.png,
&c->data.png.info, 0);
msg_data.error = messages_get("NoMemory");
content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
warn_user("NoMemory", 0);
return false;
}
if (setjmp(png_jmpbuf(c->data.png.png))) {
png_destroy_read_struct(&c->data.png.png,
&c->data.png.info, 0);
LOG(("Failed to set callbacks"));
c->data.png.png = NULL;
c->data.png.info = NULL;
msg_data.error = messages_get("PNGError");
content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
return false;
}
png_set_progressive_read_fn(c->data.png.png, c,
info_callback, row_callback, end_callback);
return true;
}
bool nspng_process_data(struct content *c, char *data, unsigned int size)
{
union content_msg_data msg_data;
if (setjmp(png_jmpbuf(c->data.png.png))) {
png_destroy_read_struct(&c->data.png.png,
&c->data.png.info, 0);
LOG(("Failed to process data"));
c->data.png.png = NULL;
c->data.png.info = NULL;
if (c->data.png.bitmap != NULL) {
bitmap_destroy(c->data.png.bitmap);
c->data.png.bitmap = NULL;
}
msg_data.error = messages_get("PNGError");
content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
return false;
}
png_process_data(c->data.png.png, c->data.png.info, data, size);
return true;
}
/**
* info_callback -- PNG header has been completely received, prepare to process
* image data
*/
void info_callback(png_structp png, png_infop info)
{
int bit_depth, color_type, interlace, intent;
double gamma;
unsigned int rowbytes, sprite_size;
unsigned long width, height;
struct content *c = png_get_progressive_ptr(png);
/* Read the PNG details */
png_get_IHDR(png, info, &width, &height, &bit_depth,
&color_type, &interlace, 0, 0);
/* Claim the required memory for the converted PNG */
c->data.png.bitmap = bitmap_create(width, height, BITMAP_NEW);
c->data.png.bitbuffer = bitmap_get_buffer(c->data.png.bitmap);
c->data.png.rowstride = bitmap_get_rowstride(c->data.png.bitmap);
c->data.png.bpp = bitmap_get_bpp(c->data.png.bitmap);
/* Set up our transformations */
if (color_type == PNG_COLOR_TYPE_PALETTE)
png_set_palette_to_rgb(png);
if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8)
png_set_gray_1_2_4_to_8(png);
if (png_get_valid(png, info, PNG_INFO_tRNS))
png_set_tRNS_to_alpha(png);
if (bit_depth == 16)
png_set_strip_16(png);
if (color_type == PNG_COLOR_TYPE_GRAY ||
color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
png_set_gray_to_rgb(png);
if (!(color_type & PNG_COLOR_MASK_ALPHA))
png_set_filler(png, 0xff, PNG_FILLER_AFTER);
/* gamma correction - we use 2.2 as our screen gamma
* this appears to be correct (at least in respect to !Browse)
* see http://www.w3.org/Graphics/PNG/all_seven.html for a test case
*/
if (png_get_sRGB(png, info, &intent))
png_set_gamma(png, 2.2, 0.45455);
else {
if (png_get_gAMA(png, info, &gamma))
png_set_gamma(png, 2.2, gamma);
else
png_set_gamma(png, 2.2, 0.45455);
}
png_read_update_info(png, info);
c->data.png.rowbytes = png_get_rowbytes(png, info);
c->data.png.interlace = (interlace == PNG_INTERLACE_ADAM7);
c->width = width;
c->height = height;
LOG(("size %li * %li, bpp %i, rowbytes %u", width,
height, bit_depth, c->data.png.rowbytes));
}
static unsigned int interlace_start[8] = {0, 16, 0, 8, 0, 4, 0};
static unsigned int interlace_step[8] = {28, 28, 12, 12, 4, 4, 0};
static unsigned int interlace_row_start[8] = {0, 0, 4, 0, 2, 0, 1};
static unsigned int interlace_row_step[8] = {8, 8, 8, 4, 4, 2, 2};
void row_callback(png_structp png, png_bytep new_row,
png_uint_32 row_num, int pass)
{
struct content *c = png_get_progressive_ptr(png);
unsigned long i, j, rowbytes = c->data.png.rowbytes;
unsigned int start, step;
unsigned char *row = c->data.png.bitbuffer + (c->data.png.rowstride * row_num);
/* Abort if we've not got any data
*/
if (new_row == 0)
return;
/* Handle interlaced sprites using the Adam7 algorithm
*/
if (c->data.png.interlace) {
start = interlace_start[pass];
step = interlace_step[pass];
row_num = interlace_row_start[pass] +
interlace_row_step[pass] * row_num;
/* Copy the data to our current row taking into consideration interlacing
*/
row = c->data.png.bitbuffer + (c->data.png.rowstride * row_num);
for (j = 0, i = start; i < rowbytes; i += step) {
row[i++] = new_row[j++];
row[i++] = new_row[j++];
row[i++] = new_row[j++];
row[i++] = new_row[j++];
}
} else {
/* Do a fast memcpy of the row data
*/
memcpy(row, new_row, rowbytes);
}
}
void end_callback(png_structp png, png_infop info)
{
}
bool nspng_convert(struct content *c, int width, int height)
{
assert(c->data.png.png);
assert(c->data.png.info);
png_destroy_read_struct(&c->data.png.png, &c->data.png.info, 0);
c->title = malloc(NSPNG_TITLE_LEN);
if (c->title != NULL)
snprintf(c->title, NSPNG_TITLE_LEN, messages_get("PNGTitle"),
c->width, c->height, c->source_size);
c->size += (c->width * c->height * 4) + NSPNG_TITLE_LEN;
c->status = CONTENT_STATUS_DONE;
c->bitmap = c->data.png.bitmap;
content_set_status(c, "");
return true;
}
void nspng_destroy(struct content *c)
{
free(c->title);
if (c->data.png.bitmap != NULL) {
bitmap_destroy(c->data.png.bitmap);
}
}
bool nspng_redraw(struct content *c, int x, int y,
int width, int height,
int clip_x0, int clip_y0, int clip_x1, int clip_y1,
float scale, unsigned long background_colour)
{
if (c->bitmap != NULL)
plot.bitmap(x, y, width, height, c->bitmap, background_colour, c);
return true;
}
bool nspng_redraw_tiled(struct content *c, int x, int y, int width, int height,
int clip_x0, int clip_y0, int clip_x1, int clip_y1,
float scale, unsigned long background_colour,
bool repeat_x, bool repeat_y)
{
return true;
}
#endif

51
image/png.h Normal file
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@ -0,0 +1,51 @@
/*
* Copyright 2003 James Bursa <bursa@users.sourceforge.net>
* Copyright 2008 Daniel Silverstone <dsilvers@netsurf-browser.org>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf 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; version 2 of the License.
*
* NetSurf 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _NETSURF_RISCOS_PNG_H_
#define _NETSURF_RISCOS_PNG_H_
#include <stdbool.h>
#include <libpng/png.h>
struct content;
struct bitmap;
struct content_png_data {
png_structp png;
png_infop info;
int interlace;
struct bitmap *bitmap; /**< Created NetSurf bitmap */
unsigned char *bitbuffer; /**< Bitmap buffer */
size_t rowstride, bpp; /**< Bitmap rowstride and bpp */
size_t rowbytes; /**< Number of bytes per row */
};
bool nspng_create(struct content *c, const char *params[]);
bool nspng_process_data(struct content *c, char *data, unsigned int size);
bool nspng_convert(struct content *c, int width, int height);
void nspng_destroy(struct content *c);
bool nspng_redraw(struct content *c, int x, int y,
int width, int height,
int clip_x0, int clip_y0, int clip_x1, int clip_y1,
float scale, unsigned long background_colour);
bool nspng_redraw_tiled(struct content *c, int x, int y, int width, int height,
int clip_x0, int clip_y0, int clip_x1, int clip_y1,
float scale, unsigned long background_colour,
bool repeat_x, bool repeat_y);
#endif