本文整理汇总了C++中png_sizeof函数的典型用法代码示例。如果您正苦于以下问题：C++ png_sizeof函数的具体用法？C++ png_sizeof怎么用？C++ png_sizeof使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了png_sizeof函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。
示例1: calloc
/* Allocate memory for a png_struct or a png_info. The malloc and
memset can be replaced by a single call to calloc() if this is thought
to improve performance noticably. */
png_voidp /* PRIVATE */
png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)
{
#endif /* PNG_USER_MEM_SUPPORTED */
png_size_t size;
png_voidp struct_ptr;
if (type == PNG_STRUCT_INFO)
size = png_sizeof(png_info);
else if (type == PNG_STRUCT_PNG)
size = png_sizeof(png_struct);
else
return (NULL);
#ifdef PNG_USER_MEM_SUPPORTED
if(malloc_fn != NULL)
{
png_struct dummy_struct;
png_structp png_ptr = &dummy_struct;
png_ptr->mem_ptr=mem_ptr;
struct_ptr = (*(malloc_fn))(png_ptr, size);
if (struct_ptr != NULL)
png_memset(struct_ptr, 0, size);
return (struct_ptr);
}
#endif /* PNG_USER_MEM_SUPPORTED */
if (g_png_default_malloc_ptr)
struct_ptr = (png_voidp)(*g_png_default_malloc_ptr)(size);
else
struct_ptr = (png_voidp)malloc(size);
if (struct_ptr != NULL)
png_memset(struct_ptr, 0, size);
return (struct_ptr);
}
开发者ID:GRGSIBERIA，项目名称:EAWebKit，代码行数:40，代码来源:pngmem.c
示例2: png_debug_malloc
png_voidp
png_debug_malloc(png_structp png_ptr, png_uint_32 size)
{
/* png_malloc has already tested for NULL; png_create_struct calls
* png_debug_malloc directly, with png_ptr == NULL which is OK
*/
if (size == 0)
return (NULL);
/* This calls the library allocator twice, once to get the requested
buffer and once to get a new free list entry. */
{
/* Disable malloc_fn and free_fn */
memory_infop pinfo;
png_set_mem_fn(png_ptr, NULL, NULL, NULL);
pinfo = (memory_infop)png_malloc(png_ptr,
(png_uint_32)png_sizeof(*pinfo));
pinfo->size = size;
current_allocation += size;
total_allocation += size;
num_allocations ++;
if (current_allocation > maximum_allocation)
maximum_allocation = current_allocation;
pinfo->pointer = (png_voidp)png_malloc(png_ptr, size);
/* Restore malloc_fn and free_fn */
png_set_mem_fn(png_ptr,
png_voidp_NULL, (png_malloc_ptr)png_debug_malloc,
(png_free_ptr)png_debug_free);
if (size != 0 && pinfo->pointer == NULL)
{
current_allocation -= size;
total_allocation -= size;
png_error(png_ptr,
"out of memory in pngtest->png_debug_malloc.");
}
pinfo->next = pinformation;
pinformation = pinfo;
/* Make sure the caller isn't assuming zeroed memory. */
png_memset(pinfo->pointer, 0xdd, pinfo->size);
if (verbose)
printf("png_malloc %lu bytes at %x\n", (unsigned long)size,
pinfo->pointer);
return (png_voidp)(pinfo->pointer);
}
}
开发者ID:0ryuO，项目名称:dolphin-avsync，代码行数:47，代码来源:pngtest.c
示例3: writePng
// write 24-bit image data to a file
int writePng(FILE * fp, int w, int h, char * data) {
// set up row pointers
png_byte ** row_pointers = (png_byte**)malloc(h*png_sizeof(png_bytep));
if( !row_pointers ) {
return -1;
}
for( int i=0; i<h; i++ ) {
row_pointers[i] = (png_byte*)(data + i*w*3);
}
// set up png structures
png_structp png_ptr = png_create_write_struct(
PNG_LIBPNG_VER_STRING, (png_voidp)NULL, NULL, NULL);
if(!png_ptr)
return -1;
png_infop info_ptr = png_create_info_struct(png_ptr);
if(!info_ptr) {
png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
return -1;
}
// set up error-handling
if( setjmp(png_jmpbuf(png_ptr)) ) {
png_destroy_write_struct(&png_ptr, &info_ptr);
return -1;
}
png_init_io(png_ptr, fp);
// set up width, height, RGB with 8-bits/color
png_set_IHDR(png_ptr, info_ptr, w, h, 8, PNG_COLOR_TYPE_RGB,
PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT);
png_set_rows(png_ptr, info_ptr, row_pointers);
png_write_png(png_ptr, info_ptr, PNG_TRANSFORM_IDENTITY, NULL);
// clean up
png_destroy_write_struct(&png_ptr, &info_ptr);
free(row_pointers);
return 0;
}
开发者ID:trainman419，项目名称:raytracer，代码行数:47，代码来源:png.cpp
示例4: png_create_info_struct_2
png_info * png_create_info_struct_2(png_struct * png_ptr)
{
png_info * info_ptr;
//png_debug(1, "in png_create_info_struct");
if (png_ptr == NULL)
return (NULL);
#ifdef PNG_USER_MEM_SUPPORTED
info_ptr = (png_info *)png_create_struct_3(PNG_STRUCT_INFO,
png_ptr->malloc_fn, png_ptr->mem_ptr);
#endif
Uart_Printf("init info struct\n");
if (info_ptr != NULL)
png_info_init_4(&info_ptr, png_sizeof(png_info));
Uart_Printf("initialized\n");
return info_ptr;
}
开发者ID:kuriel07，项目名称:Yggdrasil，代码行数:18，代码来源:yggdrasil_pv.c
示例5: png_info_init_4
void png_info_init_4(png_info ** ptr_ptr, png_size_t png_info_struct_size)
{
png_info * info_ptr = * ptr_ptr;
//png_debug(1, "in png_info_init_3");
if (info_ptr == NULL)
return;
/*if (png_sizeof(png_info) > png_info_struct_size)
{
png_destroy_struct_4(info_ptr);
info_ptr = (png_info *)png_create_struct(PNG_STRUCT_INFO);
*ptr_ptr = info_ptr;
}*/
memset(info_ptr, 0, png_sizeof(png_info));
}
开发者ID:kuriel07，项目名称:Yggdrasil，代码行数:18，代码来源:yggdrasil_pv.c
示例6: png_create_info_struct
/* Allocate the memory for an info_struct for the application. We don't
* really need the png_ptr, but it could potentially be useful in the
* future. This should be used in favour of malloc(png_sizeof(png_info))
* and png_info_init() so that applications that want to use a shared
* libpng don't have to be recompiled if png_info changes size.
*/
png_infop PNGAPI
png_create_info_struct(png_structp png_ptr)
{
png_infop info_ptr;
png_debug(1, "in png_create_info_struct\n");
if(png_ptr == NULL) return (NULL);
#ifdef PNG_USER_MEM_SUPPORTED
info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO,
png_ptr->malloc_fn, png_ptr->mem_ptr);
#else
info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO);
#endif
if (info_ptr != NULL)
png_info_init_3(&info_ptr, png_sizeof(png_info));
return (info_ptr);
}
开发者ID:bubbg，项目名称:lambdanative，代码行数:24，代码来源:png.c
示例7: png_info_destroy
/* This is an internal routine to free any memory that the info struct is
* pointing to before re-using it or freeing the struct itself. Recall
* that png_free() checks for NULL pointers for us.
*/
void /* PRIVATE */
png_info_destroy(png_structp png_ptr, png_infop info_ptr)
{
png_debug(1, "in png_info_destroy\n");
png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
if (png_ptr->num_chunk_list)
{
png_free(png_ptr, png_ptr->chunk_list);
png_ptr->chunk_list=NULL;
png_ptr->num_chunk_list=0;
}
#endif
png_info_init_3(&info_ptr, png_sizeof(png_info));
}
开发者ID:bubbg，项目名称:lambdanative，代码行数:22，代码来源:png.c
示例8: png_set_tIME
void PNGAPI
png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time)
{
png_debug1(1, "in %s storage function", "tIME");
if (png_ptr == NULL || info_ptr == NULL ||
(png_ptr->mode & PNG_WROTE_tIME))
return;
if (mod_time->month == 0 || mod_time->month > 12 ||
mod_time->day == 0 || mod_time->day > 31 ||
mod_time->hour > 23 || mod_time->minute > 59 ||
mod_time->second > 60)
{
png_warning(png_ptr, "Ignoring invalid time value");
return;
}
png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));
info_ptr->valid |= PNG_INFO_tIME;
}
开发者ID:robn，项目名称:pioneer-thirdparty，代码行数:21，代码来源:pngset.c
示例9: png_set_hIST
void PNGAPI
png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_const_uint_16p hist)
{
int i;
png_debug1(1, "in %s storage function", "hIST");
if (png_ptr == NULL || info_ptr == NULL)
return;
if (info_ptr->num_palette == 0 || info_ptr->num_palette
> PNG_MAX_PALETTE_LENGTH)
{
png_warning(png_ptr,
"Invalid palette size, hIST allocation skipped");
return;
}
png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
/* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in
* version 1.2.1
*/
png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16));
if (png_ptr->hist == NULL)
{
png_warning(png_ptr, "Insufficient memory for hIST chunk data");
return;
}
for (i = 0; i < info_ptr->num_palette; i++)
png_ptr->hist[i] = hist[i];
info_ptr->hist = png_ptr->hist;
info_ptr->valid |= PNG_INFO_hIST;
info_ptr->free_me |= PNG_FREE_HIST;
}
开发者ID:robn，项目名称:pioneer-thirdparty，代码行数:40，代码来源:pngset.c
示例10: wrPng
void wrPng(BYTE *bits, int w, int h, int line, FILE *f)
{
png_structp png_ptr;
png_infop info_ptr;
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
if(png_ptr){
info_ptr = png_create_info_struct(png_ptr);
if(info_ptr){
if(!setjmp(png_jmpbuf(png_ptr))){
png_init_io(png_ptr, f);
png_set_IHDR(png_ptr, info_ptr, w, h, 8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
BYTE **row_pointers = (BYTE**)png_malloc(png_ptr, h*png_sizeof(png_bytep));
for(int i=0; i<h; i++){
row_pointers[i]= bits+(h-i-1)*line;
}
png_set_rows(png_ptr, info_ptr, row_pointers);
png_write_png(png_ptr, info_ptr, PNG_TRANSFORM_BGR, 0);
png_free(png_ptr, row_pointers);
}
}
png_destroy_write_struct(&png_ptr, &info_ptr);
}
}
开发者ID:kambala-decapitator，项目名称:colorsudoku，代码行数:24，代码来源:sudoku.cpp
示例11: png_push_read_zTXt
//.........这里部分代码省略.........
(text - key));
png_ptr->zstream.next_out = png_ptr->zbuf;
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
key_size = text - key;
text_size = 0;
text = NULL;
ret = Z_STREAM_END;
while (png_ptr->zstream.avail_in)
{
ret = inflate(&png_ptr->zstream, Z_PARTIAL_FLUSH);
if (ret != Z_OK && ret != Z_STREAM_END)
{
inflateReset(&png_ptr->zstream);
png_ptr->zstream.avail_in = 0;
png_ptr->current_text = NULL;
png_free(png_ptr, key);
png_free(png_ptr, text);
return;
}
if (!(png_ptr->zstream.avail_out) || ret == Z_STREAM_END)
{
if (text == NULL)
{
text = (png_charp)png_malloc(png_ptr,
(png_uint_32)(png_ptr->zbuf_size - png_ptr->zstream.avail_out
+ key_size + 1));
png_memcpy(text + key_size, png_ptr->zbuf,
png_ptr->zbuf_size - png_ptr->zstream.avail_out);
png_memcpy(text, key, key_size);
text_size = key_size + png_ptr->zbuf_size -
png_ptr->zstream.avail_out;
*(text + text_size) = '\0';
}
else
{
png_charp tmp;
tmp = text;
text = (png_charp)png_malloc(png_ptr, text_size +
(png_uint_32)(png_ptr->zbuf_size - png_ptr->zstream.avail_out
+ 1));
png_memcpy(text, tmp, text_size);
png_free(png_ptr, tmp);
png_memcpy(text + text_size, png_ptr->zbuf,
png_ptr->zbuf_size - png_ptr->zstream.avail_out);
text_size += png_ptr->zbuf_size - png_ptr->zstream.avail_out;
*(text + text_size) = '\0';
}
if (ret != Z_STREAM_END)
{
png_ptr->zstream.next_out = png_ptr->zbuf;
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
}
}
else
{
break;
}
if (ret == Z_STREAM_END)
break;
}
inflateReset(&png_ptr->zstream);
png_ptr->zstream.avail_in = 0;
if (ret != Z_STREAM_END)
{
png_ptr->current_text = NULL;
png_free(png_ptr, key);
png_free(png_ptr, text);
return;
}
png_ptr->current_text = NULL;
png_free(png_ptr, key);
key = text;
text += key_size;
text_ptr = (png_textp)png_malloc(png_ptr,
(png_uint_32)png_sizeof(png_text));
text_ptr->compression = PNG_TEXT_COMPRESSION_zTXt;
text_ptr->key = key;
#ifdef PNG_iTXt_SUPPORTED
text_ptr->lang = NULL;
text_ptr->lang_key = NULL;
#endif
text_ptr->text = text;
ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
png_free(png_ptr, key);
png_free(png_ptr, text_ptr);
if (ret)
png_warning(png_ptr, "Insufficient memory to store text chunk.");
}
}
开发者ID:AGenews，项目名称:GUI，代码行数:101，代码来源:pngpread.c
示例12: png_push_read_tEXt
void /* PRIVATE */
png_push_read_tEXt(png_structp png_ptr, png_infop info_ptr)
{
if (png_ptr->buffer_size && png_ptr->current_text_left)
{
png_size_t text_size;
if (png_ptr->buffer_size < png_ptr->current_text_left)
text_size = png_ptr->buffer_size;
else
text_size = png_ptr->current_text_left;
png_crc_read(png_ptr, (png_bytep)png_ptr->current_text_ptr, text_size);
png_ptr->current_text_left -= text_size;
png_ptr->current_text_ptr += text_size;
}
if (!(png_ptr->current_text_left))
{
png_textp text_ptr;
png_charp text;
png_charp key;
int ret;
if (png_ptr->buffer_size < 4)
{
png_push_save_buffer(png_ptr);
return;
}
png_push_crc_finish(png_ptr);
#if defined(PNG_MAX_MALLOC_64K)
if (png_ptr->skip_length)
return;
#endif
key = png_ptr->current_text;
for (text = key; *text; text++)
/* empty loop */ ;
if (text < key + png_ptr->current_text_size)
text++;
text_ptr = (png_textp)png_malloc(png_ptr,
(png_uint_32)png_sizeof(png_text));
text_ptr->compression = PNG_TEXT_COMPRESSION_NONE;
text_ptr->key = key;
#ifdef PNG_iTXt_SUPPORTED
text_ptr->lang = NULL;
text_ptr->lang_key = NULL;
#endif
text_ptr->text = text;
ret = png_set_text_2(png_ptr, info_ptr, text_ptr, 1);
png_free(png_ptr, key);
png_free(png_ptr, text_ptr);
png_ptr->current_text = NULL;
if (ret)
png_warning(png_ptr, "Insufficient memory to store text chunk.");
}
}
开发者ID:AGenews，项目名称:GUI，代码行数:63，代码来源:pngpread.c
示例13: png_read_init_3
void PNGAPI
png_read_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver,
png_size_t png_struct_size)
{
#ifdef PNG_SETJMP_SUPPORTED
jmp_buf tmp_jmp; /* to save current jump buffer */
#endif
int i=0;
png_structp png_ptr=*ptr_ptr;
if(png_ptr == NULL) return;
do
{
if(user_png_ver[i] != png_libpng_ver[i])
{
#ifdef PNG_LEGACY_SUPPORTED
png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
#else
png_ptr->warning_fn=NULL;
png_warning(png_ptr,
"Application uses deprecated png_read_init() and should be recompiled.");
break;
#endif
}
} while (png_libpng_ver[i++]);
png_debug(1, "in png_read_init_3\n");
#ifdef PNG_SETJMP_SUPPORTED
/* save jump buffer and error functions */
png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof (jmp_buf));
#endif
if(png_sizeof(png_struct) > png_struct_size)
{
png_destroy_struct(png_ptr);
*ptr_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
png_ptr = *ptr_ptr;
}
/* reset all variables to 0 */
png_memset(png_ptr, 0, png_sizeof (png_struct));
#ifdef PNG_SETJMP_SUPPORTED
/* restore jump buffer */
png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof (jmp_buf));
#endif
/* added at libpng-1.2.6 */
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
png_ptr->user_width_max=PNG_USER_WIDTH_MAX;
png_ptr->user_height_max=PNG_USER_HEIGHT_MAX;
#endif
/* initialize zbuf - compression buffer */
png_ptr->zbuf_size = PNG_ZBUF_SIZE;
png_ptr->zbuf = (png_bytep)png_malloc(png_ptr,
(png_uint_32)png_ptr->zbuf_size);
png_ptr->zstream.zalloc = png_zalloc;
png_ptr->zstream.zfree = png_zfree;
png_ptr->zstream.opaque = (voidpf)png_ptr;
switch (inflateInit(&png_ptr->zstream))
{
case Z_OK: /* Do nothing */ break;
case Z_MEM_ERROR:
case Z_STREAM_ERROR: png_error(png_ptr, "zlib memory"); break;
case Z_VERSION_ERROR: png_error(png_ptr, "zlib version"); break;
default: png_error(png_ptr, "Unknown zlib error");
}
png_ptr->zstream.next_out = png_ptr->zbuf;
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
png_set_read_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL);
}
开发者ID:My-Source，项目名称:root，代码行数:79，代码来源:pngread.c
示例14: png_create_read_struct_2
/* Alternate create PNG structure for reading, and allocate any memory needed. */
png_structp PNGAPI
png_create_read_struct_2(png_const_charp user_png_ver, png_voidp error_ptr,
png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
png_malloc_ptr malloc_fn, png_free_ptr free_fn)
{
#endif /* PNG_USER_MEM_SUPPORTED */
png_structp png_ptr;
#ifdef PNG_SETJMP_SUPPORTED
#ifdef USE_FAR_KEYWORD
jmp_buf jmpbuf;
#endif
#endif
int i;
png_debug(1, "in png_create_read_struct\n");
#ifdef PNG_USER_MEM_SUPPORTED
png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG,
(png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr);
#else
png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG);
#endif
if (png_ptr == NULL)
return (NULL);
#if !defined(PNG_1_0_X)
#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
png_init_mmx_flags(png_ptr); /* 1.2.0 addition */
#endif
#endif /* PNG_1_0_X */
/* added at libpng-1.2.6 */
#ifdef PNG_SET_USER_LIMITS_SUPPORTED
png_ptr->user_width_max=PNG_USER_WIDTH_MAX;
png_ptr->user_height_max=PNG_USER_HEIGHT_MAX;
#endif
#ifdef PNG_SETJMP_SUPPORTED
#ifdef USE_FAR_KEYWORD
if (setjmp(jmpbuf))
#else
if (setjmp(png_ptr->jmpbuf))
#endif
{
png_free(png_ptr, png_ptr->zbuf);
png_ptr->zbuf=NULL;
#ifdef PNG_USER_MEM_SUPPORTED
png_destroy_struct_2((png_voidp)png_ptr,
(png_free_ptr)free_fn, (png_voidp)mem_ptr);
#else
png_destroy_struct((png_voidp)png_ptr);
#endif
return (NULL);
}
#ifdef USE_FAR_KEYWORD
png_memcpy(png_ptr->jmpbuf,jmpbuf,png_sizeof(jmp_buf));
#endif
#endif
#ifdef PNG_USER_MEM_SUPPORTED
png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn);
#endif
png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn);
i=0;
do
{
if(user_png_ver[i] != png_libpng_ver[i])
png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH;
} while (png_libpng_ver[i++]);
if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH)
{
/* Libpng 0.90 and later are binary incompatible with libpng 0.89, so
* we must recompile any applications that use any older library version.
* For versions after libpng 1.0, we will be compatible, so we need
* only check the first digit.
*/
if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] ||
(user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) ||
(user_png_ver[0] == '0' && user_png_ver[2] < '9'))
{
#if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE)
char msg[80];
if (user_png_ver)
{
sprintf(msg, "Application was compiled with png.h from libpng-%.20s",
user_png_ver);
png_warning(png_ptr, msg);
}
sprintf(msg, "Application is running with png.c from libpng-%.20s",
png_libpng_ver);
png_warning(png_ptr, msg);
#endif
#ifdef PNG_ERROR_NUMBERS_SUPPORTED
png_ptr->flags=0;
//.........这里部分代码省略.........
开发者ID:Brukwa，项目名称:VisualBoyAdvance，代码行数:101，代码来源:pngread.c
示例15: test_one_file
//.........这里部分代码省略.........
png_set_error_fn(write_ptr, (png_voidp)inname, pngtest_error,
pngtest_warning);
#endif
#endif
png_debug(0, "Allocating read_info, write_info and end_info structures\n");
read_info_ptr = png_create_info_struct(read_ptr);
end_info_ptr = png_create_info_struct(read_ptr);
#ifdef PNG_WRITE_SUPPORTED
write_info_ptr = png_create_info_struct(write_ptr);
write_end_info_ptr = png_create_info_struct(write_ptr);
#endif
#ifdef PNG_SETJMP_SUPPORTED
png_debug(0, "Setting jmpbuf for read struct\n");
#ifdef USE_FAR_KEYWORD
if (setjmp(jmpbuf))
#else
if (setjmp(png_jmpbuf(read_ptr)))
#endif
{
fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname);
if (row_buf)
png_free(read_ptr, row_buf);
png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
#ifdef PNG_WRITE_SUPPORTED
png_destroy_info_struct(write_ptr, &write_end_info_ptr);
png_destroy_write_struct(&write_ptr, &write_info_ptr);
#endif
FCLOSE(fpin);
FCLOSE(fpout);
return (1);
}
#ifdef USE_FAR_KEYWORD
png_memcpy(png_jmpbuf(read_ptr),jmpbuf,png_sizeof(jmp_buf));
#endif
#ifdef PNG_WRITE_SUPPORTED
png_debug(0, "Setting jmpbuf for write struct\n");
#ifdef USE_FAR_KEYWORD
if (setjmp(jmpbuf))
#else
if (setjmp(png_jmpbuf(write_ptr)))
#endif
{
fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname);
png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
png_destroy_info_struct(write_ptr, &write_end_info_ptr);
#ifdef PNG_WRITE_SUPPORTED
png_destroy_write_struct(&write_ptr, &write_info_ptr);
#endif
FCLOSE(fpin);
FCLOSE(fpout);
return (1);
}
#ifdef USE_FAR_KEYWORD
png_memcpy(png_jmpbuf(write_ptr),jmpbuf,png_sizeof(jmp_buf));
#endif
#endif
#endif
png_debug(0, "Initializing input and output streams\n");
#if !defined(PNG_NO_STDIO)
png_init_io(read_ptr, fpin);
# ifdef PNG_WRITE_SUPPORTED
png_init_io(write_ptr, fpout);
# endif
开发者ID:50p，项目名称:multitheftauto，代码行数:67，代码来源:pngtest.c
示例16: png_read_png
void PNGAPI
png_read_png(png_structp png_ptr, png_infop info_ptr,
int transforms,
voidp params)
{
int row;
if (png_ptr == NULL)
return;
/* png_read_info() gives us all of the information from the
* PNG file before the first IDAT (image data chunk).
*/
png_read_info(png_ptr, info_ptr);
if (info_ptr->height > PNG_UINT_32_MAX/png_sizeof(png_bytep))
png_error(png_ptr, "Image is too high to process with png_read_png()");
/* -------------- image transformations start here ------------------- */
#ifdef PNG_READ_16_TO_8_SUPPORTED
/* Tell libpng to strip 16 bit/color files down to 8 bits per color.
*/
if (transforms & PNG_TRANSFORM_STRIP_16)
png_set_strip_16(png_ptr);
#endif
#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
/* Strip alpha bytes from the input data without combining with
* the background (not recommended).
*/
if (transforms & PNG_TRANSFORM_STRIP_ALPHA)
png_set_strip_alpha(png_ptr);
#endif
#if defined(PNG_READ_PACK_SUPPORTED) && !defined(PNG_READ_EXPAND_SUPPORTED)
/* Extract multiple pixels with bit depths of 1, 2, or 4 from a single
* byte into separate bytes (useful for paletted and grayscale images).
*/
if (transforms & PNG_TRANSFORM_PACKING)
png_set_packing(png_ptr);
#endif
#ifdef PNG_READ_PACKSWAP_SUPPORTED
/* Change the order of packed pixels to least significant bit first
* (not useful if you are using png_set_packing).
*/
if (transforms & PNG_TRANSFORM_PACKSWAP)
png_set_packswap(png_ptr);
#endif
#ifdef PNG_READ_EXPAND_SUPPORTED
/* Expand paletted colors into true RGB triplets
* Expand grayscale images to full 8 bits from 1, 2, or 4 bits/pixel
* Expand paletted or RGB images with transparency to full alpha
* channels so the data will be available as RGBA quartets.
*/
if (transforms & PNG_TRANSFORM_EXPAND)
if ((png_ptr->bit_depth < 8) ||
(png_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ||
(png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)))
png_set_expand(png_ptr);
#endif
/* We don't handle background color or gamma transformation or quantizing.
*/
#ifdef PNG_READ_INVERT_SUPPORTED
/* Invert monochrome files to have 0 as white and 1 as black
*/
if (transforms & PNG_TRANSFORM_INVERT_MONO)
png_set_invert_mono(png_ptr);
#endif
#ifdef PNG_READ_SHIFT_SUPPORTED
/* If you want to shift the pixel values from the range [0,255] or
* [0,65535] to the original [0,7] or [0,31], or whatever range the
* colors were originally in:
*/
if ((transforms & PNG_TRANSFORM_SHIFT)
&& png_get_valid(png_ptr, info_ptr, PNG_INFO_sBIT))
{
png_color_8p sig_bit;
png_get_sBIT(png_ptr, info_ptr, &sig_bit);
png_set_shift(png_ptr, sig_bit);
}
#endif
#ifdef PNG_READ_BGR_SUPPORTED
/* Flip the RGB pixels to BGR (or RGBA to BGRA)
*/
if (transforms & PNG_TRANSFORM_BGR)
png_set_bgr(png_ptr);
#endif
#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED
/* Swap the RGBA or GA data to ARGB or AG (or BGRA to ABGR)
*/
if (transforms & PNG_TRANSFORM_SWAP_ALPHA)
png_set_swap_alpha(png_ptr);
//.........这里部分代码省略.........
开发者ID:136446529，项目名称:Tiny-Wings-Remake-on-Android，代码行数:101，代码来源:pngread.c
示例17: write_png
// Write a png file; size of image: (width * nbytes) * height
bool write_png(char *file_name, int width, int height, int nbytes, UCHAR *image)
{
int bit_depth = 8;
FILE *fp;
png_structp png_ptr;
png_infop info_ptr;
fp = fopen(file_name, "wb");
if (fp == NULL) return false;
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (png_ptr == NULL) {
fclose(fp);
return false;
}
// Allocate/initialize the image information data
info_ptr = png_create_info_struct(png_ptr);
if (info_ptr == NULL) {
fclose(fp);
png_destroy_write_struct(&png_ptr, png_infopp_NULL);
return false;
}
// Set error handling. REQUIRED if you aren't supplying your own
// error handling functions in the png_create_write_struct() call.
if (setjmp(png_jmpbuf(png_ptr))) {
fclose(fp); // If we get here, we had a problem writing the file
png_destroy_write_struct(&png_ptr, &info_ptr);
return false;
}
// I/O initialization method: using standard C streams
png_init_io(png_ptr, fp);
// Set the image information here. Width and height are up to 2^31,
// bit_depth is one of 1, 2, 4, 8, or 16, but valid values also depend on
// the color_type selected. color_type is one of PNG_COLOR_TYPE_GRAY,
// PNG_COLOR_TYPE_GRAY_ALPHA, PNG_COLOR_TYPE_PALETTE, PNG_COLOR_TYPE_RGB,
// or PNG_COLOR_TYPE_RGB_ALPHA. interlace is either PNG_INTERLACE_NONE or
// PNG_INTERLACE_ADAM7, and the compression_type and filter_type MUST
// currently be PNG_COMPRESSION_TYPE_BASE and PNG_FILTER_TYPE_BASE. REQUIRED
if (nbytes == 4)
png_set_IHDR(png_ptr, info_ptr, (png_uint_32)width, (png_uint_32)height, bit_depth,
PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
else if (nbytes == 3)
png_set_IHDR(png_ptr, info_ptr, (png_uint_32)width, (png_uint_32)height, bit_depth,
PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
else if (nbytes == 1)
png_set_IHDR(png_ptr, info_ptr, (png_uint_32)width, (png_uint_32)height, bit_depth,
PNG_COLOR_TYPE_GRAY, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
png_write_info(png_ptr, info_ptr); // Write the file header information.
png_bytep *row_pointers = NULL;
row_pointers = (png_bytep*)malloc( height * sizeof(png_bytep) );
if (height > PNG_UINT_32_MAX/png_sizeof(png_bytep))
png_error (png_ptr, "Image is too tall to process in memory");
for (int k = 0; k < height; k++)
row_pointers[k] = (png_bytep)(image + k * width * nbytes);
//for (int k = 0; k < height; k++)
// for (int i = 0; i < width; i++) {
// memset(row_pointers[k] + nbytes * i + 0, 55, 1);
// memset(row_pointers[k] + nbytes * i + 1, 55, 1);
// }
// Write a few rows of image data
// png_write_rows(png_ptr, row_pointers, height);
// Write out the entire image data in one call
png_write_image(png_ptr, row_pointers);
// It is REQUIRED to call this to finish writing the rest of the file
png_write_end(png_ptr, info_ptr);
png_destroy_write_struct(&png_ptr, &info_ptr);
free(row_pointers);
row_pointers = NULL;
fclose(fp);
return true;
}
开发者ID:projedi，项目名称:stabilization，代码行数:90，代码来源:image_png.cpp
示例18: png_set_sPLT
void PNGAPI
png_set_sPLT(png_structp png_ptr,
png_infop info_ptr, png_const_sPLT_tp entries, int nentries)
/*
* entries - array of png_sPLT_t structures
* to be added to the list of palettes
* in the info structure.
*
* nentries - number of palette structures to be
* added.
*/
{
png_sPLT_tp np;
int i;
if (png_ptr == NULL || info_ptr == NULL)
return;
if (nentries < 0 ||
nentries > INT_MAX-info_ptr->splt_palettes_num ||
(unsigned int)/*SAFE*/(nentries +/*SAFE*/
info_ptr->splt_palettes_num) >=
PNG_SIZE_MAX/png_sizeof(png_sPLT_t))
np=NULL;
else
np = (png_sPLT_tp)png_malloc_warn(png_ptr,
(info_ptr->splt_palettes_num + nentries) *
(png_size_t)png_sizeof(png_sPLT_t));
if (np == NULL)
{
png_warning(png_ptr, "No memory for sPLT palettes");
return;
}
png_memcpy(np, info_ptr->splt_palettes,
info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
png_free(png_ptr, info_ptr->splt_palettes);
info_ptr->splt_palettes=NULL;
for (i = 0; i < nentries; i++)
{
png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
png_const_sPLT_tp from = entries + i;
png_size_t length;
length = png_strlen(from->name) + 1;
to->name = (png_charp)png_malloc_warn(png_ptr, length);
if (to->name == NULL)
{
png_warning(png_ptr,
"Out of memory while processing sPLT chunk");
continue;
}
png_memcpy(to->name, from->name, length);
to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
from->nentries * png_sizeof(png_sPLT_entry));
if (to->entries == NULL)
{
png_warning(png_ptr,
"Out of memory while processing sPLT chunk");
png_free(png_ptr, to->name);
to->name = NULL;
continue;
}
png_memcpy(to->entries, from->entries,
from->nentries * png_sizeof(png_sPLT_entry));
to->nentries = from->nentries;
to->depth = from->depth;
}
info_ptr->splt_palettes = np;
info_ptr->splt_palettes_num += nentries;
info_ptr->valid |= PNG_INFO_sPLT;
info_ptr->free_me |= PNG_FREE_SPLT;
}
开发者ID:robn，项目名称:pioneer-thirdparty，代码行数:84，代码来源:pngset.c
示例19: png_set_text_2
int /* PRIVATE */
png_set_text_2(png_structp png_ptr, png_infop info_ptr,
png_const_textp text_ptr, int num_text)
{
int i;
png_debug1(1, "in %lx storage function", png_ptr == NULL ? "unexpected" :
(unsigned long)png_ptr->chunk_name);
if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
return(0);
/* Make sure we have enough space in the "text" array in info_struct
* to hold all of the incoming text_ptr objects.
*/
if (num_text < 0 ||
num_text > INT_MAX - info_ptr->num_text - 8 ||
(unsigned int)/*SAFE*/(num_text +/*SAFE*/
info_ptr->num_text + 8) >=
PNG_SIZE_MAX/png_sizeof(png_text))
{
png_warning(png_ptr, "too many text chunks");
return(0);
}
if (info_ptr->num_text + num_text > info_ptr->max_text)
{
int old_max_text = info_ptr->max_text;
int old_num_text = info_ptr->num_text;
if (info_ptr->text != NULL)
{
png_textp old_text;
info_ptr->max_text = info_ptr->num_text + num_text + 8;
old_text = info_ptr->text;
info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
(png_size_t)(info_ptr->max_text * png_sizeof(png_text)));
if (info_ptr->text == NULL)
{
/* Restore to previous condition */
info_ptr->max_text = old_max_text;
info_ptr->text = old_text;
return(1);
}
png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max_text *
png_sizeof(png_text)));
png_free(png_ptr, old_text);
}
else
{
info_ptr->max_text = num_text + 8;
info_ptr->num_text = 0;
info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
(png_size_t)(info_ptr->max_text * png_sizeof(png_text)));
if (info_ptr->text == NULL)
{
/* Restore to previous condition */
info_ptr->num_text = old_num_text;
info_ptr->max_text = old_max_text;
return(1);
}
info_ptr->free_me |= PNG_FREE_TEXT;
}
png_debug1(3, "allocated %d entries for info_ptr->text",
info_ptr->max_text);
}
for (i = 0; i < num_text; i++)
{
png_size_t text_length, key_len;
png_size_t lang_len, lang_key_len;
png_textp textp = &(info_ptr->text[info_ptr->num_text]);
if (text_ptr[i].key == NULL)
continue;
if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE ||
text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST)
{
png_warning(png_ptr, "text compression mode is out of range");
continue;
}
key_len = png_strlen(text_ptr[i].key);
if (text_ptr[i].compression <= 0)
{
lang_len = 0;
lang_key_len = 0;
}
else
# ifdef PNG_iTXt_SUPPORTED
{
//.........这里部分代码省略.........
开发者ID:robn，项目名称:pioneer-thirdparty，代码行数:101，代码来源:pngset.c
示例20: png_set_pCAL
void PNGAPI
png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type,
int nparams, png_const_charp units, png_charpp params)
{
png_size_t length;
int i;
png_debug1(1, "in %s storage function", "pCAL");
if (png_ptr == NULL || info_ptr == NULL)
return;
length = png_strlen(purpose) + 1;
png_debug1(3, "allocating purpose for info (%lu bytes)",
(unsigned long)length);
/* TODO: validate format of calibration name and unit name */
/* Check that the type matches the specification. */
if (type < 0 || type > 3)
png_error(png_ptr, "Invalid pCAL equation type");
/* Validate params[nparams] */
for (i=0; i<nparams; ++i)
if (!png_check_fp_string(params[i], png_strlen(params[i])))
png_error(png_ptr, "Invalid format for pCAL parameter");
info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
if (info_ptr->pcal_purpose == NULL)
{
png_warning(png_ptr, "Insufficient memory for pCAL purpose");
return;
}
png_memcpy(info_ptr->pcal_purpose, purpose, length);
png_debug(3, "storing X0, X1, type, and nparams in info");
info_ptr->pcal_X0 = X0;
info_ptr->pcal_X1 = X1;
info_ptr->pcal_type = (png_byte)type;
info_ptr->pcal_nparams = (png_byte)nparams;
length = png_strlen(units) + 1;
png_debug1(3, "allocating units for info (%lu bytes)",
(unsigned long)length);
info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
if (info_ptr->pcal_units == NULL)
{
png_warning(png_ptr, "Insufficient memory for pCAL units");
return;
}
png_memcpy(info_ptr->pcal_units, units, length);
info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
(png_size_t)((nparams + 1) * png_sizeof(png_charp)));
if (info_ptr->pcal_params == NULL)
{
png_warning(png_ptr, "Insufficient memory for pCAL params");
return;
}
png_memset(info_ptr->pcal_para
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