321 lines
8.7 KiB
C
321 lines
8.7 KiB
C
/*
|
|
* 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>
|
|
|
|
/* Ugh -- setjmp.h weirdness ensues if this isn't first... */
|
|
#include "image/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, struct content *parent,
|
|
const char *params[])
|
|
{
|
|
union content_msg_data msg_data;
|
|
|
|
c->data.png.bitmap = NULL;
|
|
|
|
c->data.png.png = png_create_read_struct(PNG_LIBPNG_VER_STRING,
|
|
0, 0, 0);
|
|
if (c->data.png.png == NULL) {
|
|
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 == NULL) {
|
|
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,
|
|
(uint8_t *) 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;
|
|
png_uint_32 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);
|
|
if (c->data.png.bitmap == NULL) {
|
|
/* Failed -- bail out */
|
|
longjmp(png_jmpbuf(png), 1);
|
|
}
|
|
|
|
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_expand_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 %zu", (unsigned long)width,
|
|
(unsigned long)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 *buffer, *row;
|
|
|
|
/* Give up if there's no bitmap */
|
|
if (c->data.png.bitmap == NULL)
|
|
return;
|
|
|
|
/* Abort if we've not got any data */
|
|
if (new_row == NULL)
|
|
return;
|
|
|
|
/* Get bitmap buffer */
|
|
buffer = bitmap_get_buffer(c->data.png.bitmap);
|
|
if (buffer == NULL) {
|
|
/* No buffer, bail out */
|
|
longjmp(png_jmpbuf(png), 1);
|
|
}
|
|
|
|
/* Calculate address of row start */
|
|
row = buffer + (c->data.png.rowstride * row_num);
|
|
|
|
/* 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 interlacing
|
|
* into consideration */
|
|
row = buffer + (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 != NULL);
|
|
assert(c->data.png.info != NULL);
|
|
|
|
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;
|
|
|
|
assert(c->data.png.bitmap != NULL);
|
|
|
|
c->bitmap = c->data.png.bitmap;
|
|
bitmap_set_opaque(c->bitmap, bitmap_test_opaque(c->bitmap));
|
|
bitmap_modified(c->bitmap);
|
|
c->status = CONTENT_STATUS_DONE;
|
|
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, colour background_colour)
|
|
{
|
|
assert(c->bitmap != NULL);
|
|
|
|
return plot.bitmap(x, y, width, height, c->bitmap,
|
|
background_colour, BITMAPF_NONE);
|
|
}
|
|
|
|
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, colour background_colour,
|
|
bool repeat_x, bool repeat_y)
|
|
{
|
|
bitmap_flags_t flags = 0;
|
|
|
|
assert(c->bitmap != NULL);
|
|
|
|
if (repeat_x)
|
|
flags |= BITMAPF_REPEAT_X;
|
|
if (repeat_y)
|
|
flags |= BITMAPF_REPEAT_Y;
|
|
|
|
return plot.bitmap(x, y, width, height, c->bitmap,
|
|
background_colour, flags);
|
|
}
|
|
|
|
#endif
|