f5c934d57e
Phase 1 of re-working the configuration system. All variables are now in a single structure (well, will be) and code will be updated in phases. Left are FDD, DISK, CDROM, ZIP and Joystick.
590 lines
17 KiB
C
590 lines
17 KiB
C
/*
|
|
* VARCem Virtual ARchaeological Computer EMulator.
|
|
* An emulator of (mostly) x86-based PC systems and devices,
|
|
* using the ISA,EISA,VLB,MCA and PCI system buses, roughly
|
|
* spanning the era between 1981 and 1995.
|
|
*
|
|
* This file is part of the VARCem Project.
|
|
*
|
|
* Provide centralized access to the PNG image handler.
|
|
*
|
|
* Version: @(#)png.c 1.0.7 2019/05/03
|
|
*
|
|
* Author: Fred N. van Kempen, <decwiz@yahoo.com>
|
|
*
|
|
* Copyright 2018,2019 Fred N. van Kempen.
|
|
*
|
|
* Redistribution and use in source and binary forms, with
|
|
* or without modification, are permitted provided that the
|
|
* following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the entire
|
|
* above notice, this list of conditions and the following
|
|
* disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the
|
|
* following disclaimer in the documentation and/or other
|
|
* materials provided with the distribution.
|
|
*
|
|
* 3. Neither the name of the copyright holder nor the names
|
|
* of its contributors may be used to endorse or promote
|
|
* products derived from this software without specific
|
|
* prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
|
|
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
#include <stdio.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <wchar.h>
|
|
#include <errno.h>
|
|
#define PNG_DEBUG 0
|
|
#include <png.h>
|
|
#include "./png.h"
|
|
#include "emu.h"
|
|
#include "config.h"
|
|
#include "plat.h"
|
|
#include "ui/ui.h"
|
|
#include "devices/video/video.h"
|
|
|
|
|
|
#ifdef _WIN32
|
|
# define PATH_PNG_DLL "libpng16.dll"
|
|
#else
|
|
# define PATH_PNG_DLL "libpng16.so"
|
|
#endif
|
|
#define USE_CUSTOM_IO 1
|
|
|
|
|
|
static void *png_handle = NULL; /* handle to DLL */
|
|
#if USE_LIBPNG == 1
|
|
# define PNGFUNC(x) png_ ## x
|
|
#else
|
|
# define PNGFUNC(x) PNG_ ## x
|
|
|
|
|
|
/* Pointers to the real functions. */
|
|
static png_structp (*PNG_create_write_struct)(png_const_charp user_png_ver,
|
|
png_voidp error_ptr,
|
|
png_error_ptr error_fn,
|
|
png_error_ptr warn_fn);
|
|
static void (*PNG_destroy_write_struct)(png_structpp png_ptr_ptr,
|
|
png_infopp info_ptr_ptr);
|
|
static png_infop (*PNG_create_info_struct)(png_const_structrp png_ptr);
|
|
# if USE_CUSTOM_IO
|
|
static void (*PNG_set_write_fn)(png_structrp png_ptr,
|
|
png_voidp io_ptr,
|
|
png_rw_ptr write_data_fn,
|
|
png_flush_ptr output_flush_fn);
|
|
static png_voidp (*PNG_get_io_ptr)(png_const_structrp png_ptr);
|
|
# else
|
|
static void (*PNG_init_io)(png_structrp png_ptr, png_FILE_p fp);
|
|
# endif
|
|
static void (*PNG_set_IHDR)(png_const_structrp png_ptr,
|
|
png_inforp info_ptr, png_uint_32 width,
|
|
png_uint_32 height, int bit_depth,
|
|
int color_type, int interlace_method,
|
|
int compression_method,
|
|
int filter_method);
|
|
static void (*PNG_set_PLTE)(png_structrp png_ptr,
|
|
png_inforp info_ptr,
|
|
png_const_colorp palette,
|
|
int num_palette);
|
|
static void (*PNG_set_rows)(png_const_structrp png_ptr,
|
|
png_inforp info_ptr,
|
|
png_bytepp row_pointers);
|
|
static void (*PNG_write_png)(png_structrp png_ptr,
|
|
png_inforp info_ptr,
|
|
int transforms, png_voidp params);
|
|
static png_size_t (*PNG_get_rowbytes)(png_const_structrp png_ptr,
|
|
png_const_inforp info_ptr);
|
|
static void (*PNG_write_info)(png_structrp png_ptr,
|
|
png_const_inforp info_ptr);
|
|
static void (*PNG_write_image)(png_structrp png_ptr,
|
|
png_bytepp image);
|
|
static void (*PNG_write_row)(png_structrp png_ptr,
|
|
png_bytep row);
|
|
static void (*PNG_write_rows)(png_structrp png_ptr,
|
|
png_bytepp rows, int num);
|
|
static void (*PNG_write_end)(png_structrp png_ptr,
|
|
png_inforp info_ptr);
|
|
|
|
static void (*PNG_set_compression_level)(png_structrp png_ptr,
|
|
int level);
|
|
static void (*PNG_set_compression_mem_level)(png_structrp png_ptr,
|
|
int mem_level);
|
|
static void (*PNG_set_compression_strategy)(png_structrp png_ptr,
|
|
int strategy);
|
|
static void (*PNG_set_compression_window_bits)(png_structrp png_ptr,
|
|
int window_bits);
|
|
static void (*PNG_set_compression_method)(png_structrp png_ptr,
|
|
int method);
|
|
static void (*PNG_set_compression_buffer_size)(png_structrp png_ptr,
|
|
png_size_t size);
|
|
|
|
|
|
static const dllimp_t png_imports[] = {
|
|
{ "png_create_write_struct", &PNG_create_write_struct },
|
|
{ "png_destroy_write_struct", &PNG_destroy_write_struct },
|
|
{ "png_create_info_struct", &PNG_create_info_struct },
|
|
# if USE_CUSTOM_IO
|
|
{ "png_set_write_fn", &PNG_set_write_fn },
|
|
{ "png_get_io_ptr", &PNG_get_io_ptr },
|
|
# else
|
|
{ "png_init_io", &PNG_init_io },
|
|
# endif
|
|
{ "png_set_IHDR", &PNG_set_IHDR },
|
|
{ "png_set_PLTE", &PNG_set_PLTE },
|
|
{ "png_get_rowbytes", &PNG_get_rowbytes },
|
|
{ "png_set_rows", &PNG_set_rows },
|
|
{ "png_write_png", &PNG_write_png },
|
|
{ "png_write_info", &PNG_write_info },
|
|
{ "png_write_row", &PNG_write_row },
|
|
{ "png_write_rows", &PNG_write_rows },
|
|
{ "png_write_image", &PNG_write_image },
|
|
{ "png_write_end", &PNG_write_end },
|
|
{ "png_set_compression_level", &PNG_set_compression_level },
|
|
{ "png_set_compression_mem_level", &PNG_set_compression_mem_level },
|
|
{ "png_set_compression_strategy", &PNG_set_compression_strategy },
|
|
{ "png_set_compression_window_bits", &PNG_set_compression_window_bits},
|
|
{ "png_set_compression_method", &PNG_set_compression_method },
|
|
{ "png_set_compression_buffer_size", &PNG_set_compression_buffer_size},
|
|
{ NULL, NULL }
|
|
};
|
|
#endif
|
|
|
|
|
|
static void
|
|
error_handler(png_structp arg, const char *str)
|
|
{
|
|
ERRLOG("PNG: stream 0x%08lx error '%s'\n", arg, str);
|
|
}
|
|
|
|
|
|
static void
|
|
warning_handler(png_structp arg, const char *str)
|
|
{
|
|
ERRLOG("PNG: stream 0x%08lx warning '%s'\n", arg, str);
|
|
}
|
|
|
|
|
|
#if USE_CUSTOM_IO
|
|
/* Use custom I/O Write function to avoid debug-dll issues. */
|
|
static void
|
|
write_handler(png_struct *png_ptr, png_byte *bufp, png_size_t len)
|
|
{
|
|
FILE *fp = (FILE *)PNGFUNC(get_io_ptr)(png_ptr);
|
|
|
|
if (fwrite(bufp, 1, len, fp) != len)
|
|
ERRLOG("PNG: error writing file!\n");
|
|
}
|
|
|
|
|
|
/* Use custom I/O Flush function to avoid debug-dll issues. */
|
|
static void
|
|
flush_handler(png_struct *png_ptr)
|
|
{
|
|
FILE *fp = (FILE *)PNGFUNC(get_io_ptr)(png_ptr);
|
|
|
|
fflush(fp);
|
|
}
|
|
#endif
|
|
|
|
|
|
/* Prepare for use, load DLL if needed. */
|
|
int
|
|
png_load(void)
|
|
{
|
|
#if USE_LIBPNG == 2
|
|
wchar_t temp[512];
|
|
const char *fn = PATH_PNG_DLL;
|
|
#endif
|
|
|
|
/* If already loaded, good! */
|
|
if (png_handle != NULL) return(1);
|
|
|
|
#if USE_LIBPNG == 2
|
|
/* Try loading the DLL. */
|
|
png_handle = dynld_module(fn, png_imports);
|
|
if (png_handle == NULL) {
|
|
swprintf(temp, sizeof_w(temp),
|
|
get_string(IDS_ERR_NOLIB), "PNG", fn);
|
|
ui_msgbox(MBX_ERROR, temp);
|
|
ERRLOG("PNG: unable to load '%s'; format disabled!\n", fn);
|
|
return(0);
|
|
} else
|
|
INFO("PNG: module '%s' loaded.\n", fn);
|
|
#else
|
|
png_handle = (void *)1; /* just to indicate always therse */
|
|
#endif
|
|
|
|
return(1);
|
|
}
|
|
|
|
|
|
/* No longer needed, unload DLL if needed. */
|
|
void
|
|
png_unload(void)
|
|
{
|
|
#if USE_LIBPNG == 2
|
|
/* Unload the DLL if possible. */
|
|
if (png_handle != NULL)
|
|
dynld_close(png_handle);
|
|
#endif
|
|
png_handle = NULL;
|
|
}
|
|
|
|
|
|
/* Write the given image as an 8-bit GrayScale file. */
|
|
int
|
|
png_write_gray(const wchar_t *fn, int inv, uint8_t *pix, int16_t w, int16_t h)
|
|
{
|
|
png_structp png = NULL;
|
|
png_infop info = NULL;
|
|
png_bytep row;
|
|
int16_t x, y;
|
|
FILE *fp;
|
|
|
|
/* Load the DLL if needed, give up if that fails. */
|
|
if (! png_load()) return(0);
|
|
|
|
/* Create the image file. */
|
|
fp = plat_fopen(fn, L"wb");
|
|
if (fp == NULL) {
|
|
/* Yes, this looks weird. */
|
|
if (fp == NULL)
|
|
ERRLOG("PNG: file %ls could not be opened for writing!\n", fn);
|
|
else
|
|
error:
|
|
ERRLOG("PNG: fatal error, bailing out, error = %i\n", errno);
|
|
if (png != NULL)
|
|
PNGFUNC(destroy_write_struct)(&png, &info);
|
|
if (fp != NULL)
|
|
(void)fclose(fp);
|
|
return(0);
|
|
}
|
|
|
|
/* Initialize PNG stuff. */
|
|
png = PNGFUNC(create_write_struct)(PNG_LIBPNG_VER_STRING, NULL,
|
|
error_handler, warning_handler);
|
|
if (png == NULL) {
|
|
ERRLOG("PNG: create_write_struct failed!\n");
|
|
goto error;
|
|
}
|
|
|
|
info = PNGFUNC(create_info_struct)(png);
|
|
if (info == NULL) {
|
|
ERRLOG("PNG: create_info_struct failed!\n");
|
|
goto error;
|
|
}
|
|
|
|
#if USE_LIBPNG == 1
|
|
/* Set up error handling. */
|
|
if (setjmp(png_jmpbuf(png))) {
|
|
/* If we get here, we had a problem writing the file */
|
|
goto error;
|
|
}
|
|
#endif
|
|
|
|
#if USE_CUSTOM_IO
|
|
/*
|
|
* We use our own I/O routines, because it seems that some of
|
|
* the PNG DLL's out there are compiled in Debug mode, which
|
|
* causes the 'FILE' definition to be different. This in turn
|
|
* results in pretty bad crashes when trying to write..
|
|
*
|
|
* Using custom I/O routines, we avoid this issue.
|
|
*/
|
|
PNGFUNC(set_write_fn)(png, (void *)fp, write_handler, flush_handler);
|
|
#else
|
|
PNGFUNC(init_io)(png, fp);
|
|
#endif
|
|
PNGFUNC(set_compression_level)(png, 9);
|
|
|
|
/* Set other "zlib" parameters. */
|
|
PNGFUNC(set_compression_mem_level)(png, 8);
|
|
PNGFUNC(set_compression_strategy)(png, PNG_Z_DEFAULT_STRATEGY);
|
|
PNGFUNC(set_compression_window_bits)(png, 15);
|
|
PNGFUNC(set_compression_method)(png, 8);
|
|
PNGFUNC(set_compression_buffer_size)(png, 8192);
|
|
|
|
PNGFUNC(set_IHDR)(png, info, w, h, 8, PNG_COLOR_TYPE_GRAY,
|
|
PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT,
|
|
PNG_FILTER_TYPE_DEFAULT);
|
|
|
|
PNGFUNC(write_info)(png, info);
|
|
|
|
/* Create a buffer for one scanline of pixels. */
|
|
row = (png_bytep)mem_alloc(PNGFUNC(get_rowbytes)(png, info));
|
|
|
|
/* Process all scanlines in the image. */
|
|
for (y = 0; y < h; y++) {
|
|
for (x = 0; x < w; x++) {
|
|
/* Copy the pixel data. */
|
|
if (inv)
|
|
row[x] = 255 - pix[(y * w) + x];
|
|
else
|
|
row[x] = pix[(y * w) + x];
|
|
}
|
|
|
|
/* Write image to the file. */
|
|
PNGFUNC(write_rows)(png, &row, 1);
|
|
}
|
|
|
|
/* No longer need the row buffer. */
|
|
free(row);
|
|
|
|
PNGFUNC(write_end)(png, NULL);
|
|
|
|
PNGFUNC(destroy_write_struct)(&png, &info);
|
|
|
|
/* Clean up. */
|
|
(void)fclose(fp);
|
|
|
|
return(1);
|
|
}
|
|
|
|
|
|
/* Write the given BITMAP-format image as an 8-bit RGBA file. */
|
|
int
|
|
png_write_rgb(const wchar_t *fn, int flip, uint8_t *pix, int16_t w, int16_t h)
|
|
{
|
|
png_structp png = NULL;
|
|
png_infop info = NULL;
|
|
png_bytepp rows;
|
|
uint8_t *r, *b;
|
|
uint32_t *rgb;
|
|
FILE *fp;
|
|
int y, x;
|
|
|
|
/* Load the DLL if needed, give up if that fails. */
|
|
if (! png_load()) return(0);
|
|
|
|
/* Create the image file. */
|
|
fp = plat_fopen(fn, L"wb");
|
|
if (fp == NULL) {
|
|
ERRLOG("PNG: File %ls could not be opened for writing!\n", fn);
|
|
error:
|
|
if (png != NULL)
|
|
PNGFUNC(destroy_write_struct)(&png, &info);
|
|
if (fp != NULL)
|
|
(void)fclose(fp);
|
|
return(0);
|
|
}
|
|
|
|
/* Initialize PNG stuff. */
|
|
png = PNGFUNC(create_write_struct)(PNG_LIBPNG_VER_STRING, NULL,
|
|
error_handler, warning_handler);
|
|
if (png == NULL) {
|
|
ERRLOG("PNG: create_write_struct failed!\n");
|
|
goto error;
|
|
}
|
|
|
|
info = PNGFUNC(create_info_struct)(png);
|
|
if (info == NULL) {
|
|
ERRLOG("PNG: create_info_struct failed!\n");
|
|
goto error;
|
|
}
|
|
|
|
#if USE_CUSTOM_IO
|
|
/*
|
|
* We use our own I/O routines, because it seems that some of
|
|
* the PNG DLL's out there are compiled in Debug mode, which
|
|
* causes the 'FILE' definition to be different. This in turn
|
|
* results in pretty bad crashes when trying to write..
|
|
*
|
|
* Using custom I/O routines, we avoid this issue.
|
|
*/
|
|
PNGFUNC(set_write_fn)(png, (void *)fp, write_handler, flush_handler);
|
|
#else
|
|
PNGFUNC(init_io)(png, fp);
|
|
#endif
|
|
PNGFUNC(set_compression_level)(png, 9);
|
|
|
|
/* Set other "zlib" parameters. */
|
|
PNGFUNC(set_compression_mem_level)(png, 8);
|
|
PNGFUNC(set_compression_strategy)(png, PNG_Z_DEFAULT_STRATEGY);
|
|
PNGFUNC(set_compression_window_bits)(png, 15);
|
|
PNGFUNC(set_compression_method)(png, 8);
|
|
PNGFUNC(set_compression_buffer_size)(png, 8192);
|
|
|
|
PNGFUNC(set_IHDR)(png, info, w, h, 8, PNG_COLOR_TYPE_RGB,
|
|
PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT,
|
|
PNG_FILTER_TYPE_DEFAULT);
|
|
|
|
PNGFUNC(write_info)(png, info);
|
|
|
|
/* Create a buffer for scanlines of pixels. */
|
|
rows = (png_bytepp)mem_alloc(sizeof(png_bytep) * h);
|
|
|
|
/* Process all scanlines in the image. */
|
|
for (y = 0; y < h; y++) {
|
|
/* Create a buffer for this scanline. */
|
|
rows[y] = (png_bytep)mem_alloc(PNGFUNC(get_rowbytes)(png, info));
|
|
|
|
/* Process all pixels on this line */
|
|
for (x = 0; x < w; x++) {
|
|
b = &pix[((y * w) + x) * 4];
|
|
|
|
/* Transform if needed. */
|
|
if (config.vid_grayscale || config.invert_display) {
|
|
rgb = (uint32_t *)b;
|
|
*rgb = video_color_transform(*rgb);
|
|
}
|
|
|
|
if (flip) {
|
|
/*
|
|
* Since the bitmap is in 'bottom-up' mode, we
|
|
* have to convert all pixels to RGB mode, but
|
|
* also 'flip' the image to the normal top-down
|
|
* mode.
|
|
*/
|
|
|
|
/* Get pointer to png row data. */
|
|
r = &rows[(h - 1) - y][x * 3];
|
|
|
|
/* Copy the pixel data. */
|
|
r[0] = b[2];
|
|
r[1] = b[1];
|
|
r[2] = b[0];
|
|
} else {
|
|
/* Get pointer to png row data. */
|
|
r = &rows[y][x * 3];
|
|
|
|
/* Copy the pixel data. */
|
|
r[0] = b[0];
|
|
r[1] = b[1];
|
|
r[2] = b[2];
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Write image to the file. */
|
|
PNGFUNC(write_image)(png, rows);
|
|
|
|
/* No longer need the row buffers. */
|
|
for (y = 0; y < h; y++)
|
|
free(rows[y]);
|
|
free(rows);
|
|
|
|
PNGFUNC(write_end)(png, NULL);
|
|
|
|
PNGFUNC(destroy_write_struct)(&png, &info);
|
|
|
|
/* Clean up. */
|
|
(void)fclose(fp);
|
|
|
|
return(1);
|
|
}
|
|
|
|
|
|
/* Write the given BITMAP-format image as an 8-bit color palette file. */
|
|
int
|
|
png_write_pal(const wchar_t *fn, uint8_t *pix, int16_t w, int16_t h, uint16_t pitch, PALETTE pal)
|
|
{
|
|
png_color palette[256];
|
|
png_structp png = NULL;
|
|
png_infop info = NULL;
|
|
png_bytepp rows;
|
|
FILE *fp;
|
|
int i;
|
|
|
|
/* Load the DLL if needed, give up if that fails. */
|
|
if (! png_load()) return(0);
|
|
|
|
/* Create the image file. */
|
|
fp = plat_fopen(fn, L"wb");
|
|
if (fp == NULL) {
|
|
ERRLOG("PNG: File %ls could not be opened for writing!\n", fn);
|
|
error:
|
|
if (png != NULL)
|
|
PNGFUNC(destroy_write_struct)(&png, &info);
|
|
if (fp != NULL)
|
|
(void)fclose(fp);
|
|
return(0);
|
|
}
|
|
|
|
/* Initialize PNG stuff. */
|
|
png = PNGFUNC(create_write_struct)(PNG_LIBPNG_VER_STRING, NULL,
|
|
error_handler, warning_handler);
|
|
if (png == NULL) {
|
|
ERRLOG("PNG: create_write_struct failed!\n");
|
|
goto error;
|
|
}
|
|
|
|
info = PNGFUNC(create_info_struct)(png);
|
|
if (info == NULL) {
|
|
ERRLOG("PNG: create_info_struct failed!\n");
|
|
goto error;
|
|
}
|
|
|
|
#if USE_CUSTOM_IO
|
|
/*
|
|
* We use our own I/O routines, because it seems that some of
|
|
* the PNG DLL's out there are compiled in Debug mode, which
|
|
* causes the 'FILE' definition to be different. This in turn
|
|
* results in pretty bad crashes when trying to write..
|
|
*
|
|
* Using custom I/O routines, we avoid this issue.
|
|
*/
|
|
PNGFUNC(set_write_fn)(png, (void *)fp, write_handler, flush_handler);
|
|
#else
|
|
PNGFUNC(init_io)(png, fp);
|
|
#endif
|
|
PNGFUNC(set_compression_level)(png, 9);
|
|
|
|
/* Set other "zlib" parameters. */
|
|
PNGFUNC(set_compression_mem_level)(png, 8);
|
|
PNGFUNC(set_compression_strategy)(png, PNG_Z_DEFAULT_STRATEGY);
|
|
PNGFUNC(set_compression_window_bits)(png, 15);
|
|
PNGFUNC(set_compression_method)(png, 8);
|
|
PNGFUNC(set_compression_buffer_size)(png, 8192);
|
|
|
|
PNGFUNC(set_IHDR)(png, info, w, h, 8, PNG_COLOR_TYPE_PALETTE,
|
|
PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT,
|
|
PNG_FILTER_TYPE_DEFAULT);
|
|
|
|
PNGFUNC(write_info)(png, info);
|
|
|
|
/* Create the palette. */
|
|
for (i = 0; i < 256; i++) {
|
|
palette[i].red = pal[i].r;
|
|
palette[i].green = pal[i].g;
|
|
palette[i].blue = pal[i].b;
|
|
}
|
|
PNGFUNC(set_PLTE)(png, info, palette, i);
|
|
|
|
/* Create a buffer for scanlines of pixels. */
|
|
rows = (png_bytep *)mem_alloc(sizeof(png_bytep) * h);
|
|
for (i = 0; i < h; i++) {
|
|
/* Create a buffer for this scanline. */
|
|
rows[i] = (pix + (i * pitch));
|
|
}
|
|
PNGFUNC(set_rows)(png, info, rows);
|
|
|
|
/* Write image to the file. */
|
|
PNGFUNC(write_png)(png, info, 0, NULL);
|
|
|
|
/* No longer need the row buffers. */
|
|
free(rows);
|
|
|
|
PNGFUNC(destroy_write_struct)(&png, &info);
|
|
|
|
/* Clean up. */
|
|
(void)fclose(fp);
|
|
|
|
return(1);
|
|
}
|