void
HPDF_EncryptDict_OnFree (HPDF_Dict obj)
{
HPDF_Encrypt attr = (HPDF_Encrypt)obj->attr;
HPDF_PTRACE((" HPDF_EncryptDict_OnFree\n"));
if (attr)
HPDF_FreeMem (obj->mmgr, attr);
}
void
HPDF_CIDFontDef_FreeFunc (HPDF_FontDef fontdef)
{
HPDF_CIDFontDefAttr attr = (HPDF_CIDFontDefAttr)fontdef->attr;
HPDF_PTRACE (" HPDF_CIDFontDef_FreeFunc\n");
HPDF_CIDFontDef_FreeWidth (fontdef);
HPDF_FreeMem (fontdef->mmgr, attr);
}
static void
OnFree_Func (HPDF_Dict obj)
{
HPDF_FontAttr attr = (HPDF_FontAttr)obj->attr;
HPDF_PTRACE (" HPDF_Type0Font_OnFree\n");
if (attr)
HPDF_FreeMem (obj->mmgr, attr);
}
HPDF_Xref
HPDF_Xref_New (HPDF_MMgr mmgr,
HPDF_UINT32 offset)
{
HPDF_Xref xref;
HPDF_XrefEntry new_entry;
HPDF_PTRACE((" HPDF_Xref_New\n"));
xref = (HPDF_Xref)HPDF_GetMem (mmgr, sizeof(HPDF_Xref_Rec));
if (!xref)
return NULL;
HPDF_MemSet (xref, 0, sizeof(HPDF_Xref_Rec));
xref->mmgr = mmgr;
xref->error = mmgr->error;
xref->start_offset = offset;
xref->entries = HPDF_List_New (mmgr, HPDF_DEFALUT_XREF_ENTRY_NUM);
if (!xref->entries)
goto Fail;
xref->addr = 0;
if (xref->start_offset == 0) {
new_entry = (HPDF_XrefEntry)HPDF_GetMem (mmgr,
sizeof(HPDF_XrefEntry_Rec));
if (!new_entry)
goto Fail;
if (HPDF_List_Add (xref->entries, new_entry) != HPDF_OK) {
HPDF_FreeMem (mmgr, new_entry);
goto Fail;
}
/* add first entry which is free entry and whose generation
* number is 0
*/
new_entry->entry_typ = HPDF_FREE_ENTRY;
new_entry->byte_offset = 0;
new_entry->gen_no = HPDF_MAX_GENERATION_NUM;
new_entry->obj = NULL;
}
xref->trailer = HPDF_Dict_New (mmgr);
if (!xref->trailer)
goto Fail;
return xref;
Fail:
HPDF_PTRACE((" HPDF_Xref_New failed\n"));
HPDF_Xref_Free (xref);
return NULL;
}
static HPDF_STATUS
ReadPngData_Interlaced (HPDF_Dict image,
png_structp png_ptr,
png_infop info_ptr)
{
png_uint_32 len = png_get_rowbytes(png_ptr, info_ptr);
png_uint_32 height = png_get_image_height(png_ptr, info_ptr);
png_bytep* row_pointers = HPDF_GetMem (image->mmgr,
height * sizeof (png_bytep));
if (row_pointers) {
HPDF_UINT i;
HPDF_MemSet (row_pointers, 0, height * sizeof (png_bytep));
for (i = 0; i < (HPDF_UINT)height; i++) {
row_pointers[i] = HPDF_GetMem (image->mmgr, len);
if (image->error->error_no != HPDF_OK)
break;
}
if (image->error->error_no == HPDF_OK) {
png_read_image(png_ptr, row_pointers);
if (image->error->error_no == HPDF_OK) { /* add this line */
for (i = 0; i < (HPDF_UINT)height; i++) {
if (HPDF_Stream_Write (image->stream, row_pointers[i], len) !=
HPDF_OK)
break;
}
}
}
/* clean up */
for (i = 0; i < (HPDF_UINT)height; i++) {
HPDF_FreeMem (image->mmgr, row_pointers[i]);
}
HPDF_FreeMem (image->mmgr, row_pointers);
}
return image->error->error_no;
}
void
HPDF_List_Free (HPDF_List list)
{
HPDF_PTRACE((" HPDF_List_Free\n"));
if (!list)
return ;
HPDF_List_Clear (list);
HPDF_FreeMem (list->mmgr, list);
}
void
HPDF_List_Clear (HPDF_List list)
{
HPDF_PTRACE((" HPDF_List_Clear\n"));
if (list->obj)
HPDF_FreeMem (list->mmgr, list->obj);
list->block_siz = 0;
list->count = 0;
list->obj = NULL;
}
static void
OnFree (HPDF_Dict obj)
{
HPDF_FontAttr attr = (HPDF_FontAttr)obj->attr;
HPDF_PTRACE ((" HPDF_TTFont_OnFree\n"));
HPDF_Font_FreeConvertersListAll ((HPDF_Font)obj);
if (attr) {
if (attr->widths) {
HPDF_FreeMem (obj->mmgr, attr->widths);
}
if (attr->used) {
HPDF_FreeMem (obj->mmgr, attr->used);
}
HPDF_FreeMem (obj->mmgr, attr);
}
}
void
HPDF_FontDef_Free (HPDF_FontDef fontdef)
{
if (!fontdef)
return;
HPDF_PTRACE (" HPDF_FontDef_Free\n");
if (fontdef->free_fn)
fontdef->free_fn (fontdef);
HPDF_FreeMem (fontdef->mmgr, fontdef);
}
static void
FreeWidth (HPDF_FontDef fontdef)
{
HPDF_Type1FontDefAttr attr = (HPDF_Type1FontDefAttr)fontdef->attr;
HPDF_PTRACE (" FreeWidth\n");
HPDF_FreeMem (fontdef->mmgr, attr->widths);
attr->widths = NULL;
fontdef->valid = HPDF_FALSE;
}
static HPDF_STATUS
CreatePallet (HPDF_Dict image,
png_structp png_ptr,
png_infop info_ptr)
{
HPDF_INT num_pl = 0;
png_color *src_pl = NULL;
HPDF_BYTE *ppallet;
HPDF_BYTE *p;
HPDF_UINT i;
HPDF_Array array;
/* png_get_PLTE does not call PngErrorFunc even if it failed.
* so we call HPDF_Set_Error to set error-code.
*/
if (png_get_PLTE(png_ptr, info_ptr, (png_color**)&src_pl, &num_pl) !=
PNG_INFO_PLTE)
return HPDF_SetError (image->error, HPDF_LIBPNG_ERROR,
HPDF_CANNOT_GET_PALLET);
/* make a pallet array for indexed image. */
ppallet = HPDF_GetMem (image->mmgr, num_pl * 3);
if (!ppallet)
return image->error->error_no;
p = ppallet;
for (i = 0; i < num_pl; i++, src_pl++) {
*p++ = src_pl->red;
*p++ = src_pl->green;
*p++ = src_pl->blue;
}
array = HPDF_Array_New (image->mmgr);
if (array) {
HPDF_Binary b;
HPDF_Dict_Add (image, "ColorSpace", array);
HPDF_Array_AddName (array, "Indexed");
HPDF_Array_AddName (array, "DeviceRGB");
HPDF_Array_AddNumber (array, num_pl - 1);
b = HPDF_Binary_New (image->mmgr, ppallet, num_pl * 3);
if (b)
HPDF_Array_Add (array, b);
}
HPDF_FreeMem (image->mmgr, ppallet);
return image->error->error_no;
}
static void
Page_OnFree (HPDF_Dict obj)
{
HPDF_PageAttr attr = (HPDF_PageAttr)obj->attr;
HPDF_PTRACE((" HPDF_Page_OnFree\n"));
if (attr) {
if (attr->gstate)
HPDF_GState_Free (obj->mmgr, attr->gstate);
HPDF_FreeMem (obj->mmgr, attr);
}
}
HPDF_Free (HPDF_Doc pdf)
{
HPDF_PTRACE ((" HPDF_Free\n"));
if (pdf) {
HPDF_MMgr mmgr = pdf->mmgr;
HPDF_FreeDocAll (pdf);
pdf->sig_bytes = 0;
HPDF_FreeMem (mmgr, pdf);
HPDF_MMgr_Free (mmgr);
}
}
void
HPDF_Array_Free (HPDF_Array array)
{
if (!array)
return;
HPDF_PTRACE((" HPDF_Array_Free\n"));
HPDF_Array_Clear (array);
HPDF_List_Free (array->list);
array->header.obj_class = 0;
HPDF_FreeMem (array->mmgr, array);
}
void
HPDF_CIDFontDef_FreeWidth (HPDF_FontDef fontdef)
{
HPDF_CIDFontDefAttr attr = (HPDF_CIDFontDefAttr)fontdef->attr;
HPDF_UINT i;
HPDF_PTRACE (" HPDF_FontDef_Validate\n");
for (i = 0; i < attr->widths->count; i++) {
HPDF_CID_Width *w =
(HPDF_CID_Width *)HPDF_List_ItemAt (attr->widths, i);
HPDF_FreeMem (fontdef->mmgr, w);
}
HPDF_List_Free (attr->widths);
attr->widths = NULL;
fontdef->valid = HPDF_FALSE;
}
HPDF_Array
HPDF_Array_New (HPDF_MMgr mmgr)
{
HPDF_Array obj;
HPDF_PTRACE((" HPDF_Array_New\n"));
obj = HPDF_GetMem (mmgr, sizeof(HPDF_Array_Rec));
if (obj) {
HPDF_MemSet (obj, 0, sizeof(HPDF_Array_Rec));
obj->header.obj_class = HPDF_OCLASS_ARRAY;
obj->mmgr = mmgr;
obj->error = mmgr->error;
obj->list = HPDF_List_New (mmgr, HPDF_DEF_ITEMS_PER_BLOCK);
if (!obj->list) {
HPDF_FreeMem (mmgr, obj);
obj = NULL;
}
}
return obj;
}
HPDF_STATUS
HPDF_Binary_SetValue (HPDF_Binary obj,
HPDF_BYTE *value,
HPDF_UINT len)
{
if (len > HPDF_LIMIT_MAX_STRING_LEN)
return HPDF_SetError (obj->error, HPDF_BINARY_LENGTH_ERR, 0);
if (obj->value) {
HPDF_FreeMem (obj->mmgr, obj->value);
obj->len = 0;
}
obj->value = HPDF_GetMem (obj->mmgr, len);
if (!obj->value)
return HPDF_Error_GetCode (obj->error);
HPDF_MemCpy (obj->value, value, len);
obj->len = len;
return HPDF_OK;
}
void
HPDF_Obj_ForceFree (HPDF_MMgr mmgr,
void *obj)
{
HPDF_Obj_Header *header;
HPDF_PTRACE((" HPDF_Obj_ForceFree\n"));
if (!obj)
return;
header = (HPDF_Obj_Header *)obj;
HPDF_PTRACE((" HPDF_Obj_ForceFree obj=0x%08X obj_id=0x%08X "
"obj_class=0x%08X\n",
(HPDF_UINT)obj, (HPDF_UINT)(header->obj_id),
(HPDF_UINT)(header->obj_class)));
switch (header->obj_class & HPDF_OCLASS_ANY) {
case HPDF_OCLASS_STRING:
HPDF_String_Free (obj);
break;
case HPDF_OCLASS_BINARY:
HPDF_Binary_Free (obj);
break;
case HPDF_OCLASS_ARRAY:
HPDF_Array_Free (obj);
break;
case HPDF_OCLASS_DICT:
HPDF_Dict_Free (obj);
break;
case HPDF_OCLASS_DIRECT:
HPDF_Direct_Free (obj);
break;
default:
HPDF_FreeMem (mmgr, obj);
}
}
static HPDF_STATUS
ReadTransparentPngData (HPDF_Dict image,
png_structp png_ptr,
png_infop info_ptr,
png_bytep smask_data)
{
HPDF_STATUS ret = HPDF_OK;
HPDF_INT row_len;
HPDF_UINT i, j;
png_bytep *row_ptr, row = 0;
png_byte color_type;
png_uint_32 height = png_get_image_height(png_ptr, info_ptr);
png_uint_32 width = png_get_image_width(png_ptr, info_ptr);
color_type = png_get_color_type(png_ptr, info_ptr);
if (!(color_type & PNG_COLOR_MASK_ALPHA)) {
return HPDF_INVALID_PNG_IMAGE;
}
row_ptr = HPDF_GetMem (image->mmgr, height * sizeof(png_bytep));
if (!row_ptr) {
return HPDF_FAILD_TO_ALLOC_MEM;
} else {
png_uint_32 len = png_get_rowbytes(png_ptr, info_ptr);
for (i = 0; i < (HPDF_UINT)height; i++) {
row_ptr[i] = HPDF_GetMem(image->mmgr, len);
if (!row_ptr[i]) {
for (; i > 0; i--) {
HPDF_FreeMem (image->mmgr, row_ptr[i]);
}
HPDF_FreeMem (image->mmgr, row_ptr);
return HPDF_FAILD_TO_ALLOC_MEM;
}
}
}
png_read_image(png_ptr, row_ptr);
if (image->error->error_no != HPDF_OK) {
ret = HPDF_INVALID_PNG_IMAGE;
goto Error;
}
switch (color_type) {
case PNG_COLOR_TYPE_RGB_ALPHA:
row_len = 3 * width * sizeof(png_byte);
for (j = 0; j < height; j++) {
for (i = 0; i < width; i++) {
row = row_ptr[j];
memmove(row + (3 * i), row + (4*i), 3);
smask_data[width * j + i] = row[4 * i + 3];
}
if (HPDF_Stream_Write (image->stream, row, row_len) != HPDF_OK) {
ret = HPDF_FILE_IO_ERROR;
goto Error;
}
}
break;
case PNG_COLOR_TYPE_GRAY_ALPHA:
row_len = width * sizeof(png_byte);
for (j = 0; j < height; j++) {
for (i = 0; i < width; i++) {
row = row_ptr[j];
row[i] = row[2 * i];
smask_data[width * j + i] = row[2 * i + 1];
}
if (HPDF_Stream_Write (image->stream, row, row_len) != HPDF_OK) {
ret = HPDF_FILE_IO_ERROR;
goto Error;
}
}
break;
default:
ret = HPDF_INVALID_PNG_IMAGE;
goto Error;
}
Error:
for (i = 0; i < (HPDF_UINT)height; i++) {
HPDF_FreeMem (image->mmgr, row_ptr[i]);
}
HPDF_FreeMem (image->mmgr, row_ptr);
return ret;
}
static HPDF_STATUS
LoadPngData (HPDF_Dict image,
HPDF_Xref xref,
HPDF_Stream png_data,
HPDF_BOOL delayed_loading)
{
HPDF_STATUS ret = HPDF_OK;
png_uint_32 width, height;
int bit_depth, color_type;
png_structp png_ptr = NULL;
png_infop info_ptr = NULL;
HPDF_PTRACE ((" HPDF_Image_LoadPngImage\n"));
/* create read_struct. */
png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING,
image->error, PngErrorFunc, PngErrorFunc);
if (png_ptr == NULL) {
HPDF_SetError (image->error, HPDF_FAILD_TO_ALLOC_MEM, 0);
return HPDF_FAILD_TO_ALLOC_MEM;
}
/* create info-struct */
info_ptr = png_create_info_struct (png_ptr);
if (info_ptr == NULL) {
HPDF_SetError (image->error, HPDF_FAILD_TO_ALLOC_MEM, 0);
goto Exit;
}
png_set_sig_bytes (png_ptr, HPDF_PNG_BYTES_TO_CHECK);
png_set_read_fn (png_ptr, (void *)png_data, (png_rw_ptr)&PngReadFunc);
/* reading info structure. */
png_read_info(png_ptr, info_ptr);
if (image->error->error_no != HPDF_OK) {
goto Exit;
}
png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, NULL, NULL, NULL);
/* 16bit images are not supported. */
if (bit_depth == 16) {
png_set_strip_16(png_ptr);
}
png_read_update_info(png_ptr, info_ptr);
if (image->error->error_no != HPDF_OK) {
goto Exit;
}
/* check palette-based images for transparent areas and load them immediately if found */
if (xref && PNG_COLOR_TYPE_PALETTE & color_type) {
png_bytep trans;
int num_trans;
HPDF_Dict smask;
png_bytep smask_data;
if (!png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS) ||
!png_get_tRNS(png_ptr, info_ptr, &trans, &num_trans, NULL)) {
goto no_transparent_color_in_palette;
}
smask = HPDF_DictStream_New (image->mmgr, xref);
if (!smask) {
ret = HPDF_FAILD_TO_ALLOC_MEM;
goto Exit;
}
smask->header.obj_class |= HPDF_OSUBCLASS_XOBJECT;
ret = HPDF_Dict_AddName (smask, "Type", "XObject");
ret += HPDF_Dict_AddName (smask, "Subtype", "Image");
ret += HPDF_Dict_AddNumber (smask, "Width", (HPDF_UINT)width);
ret += HPDF_Dict_AddNumber (smask, "Height", (HPDF_UINT)height);
ret += HPDF_Dict_AddName (smask, "ColorSpace", "DeviceGray");
ret += HPDF_Dict_AddNumber (smask, "BitsPerComponent", (HPDF_UINT)bit_depth);
if (ret != HPDF_OK) {
HPDF_Dict_Free(smask);
ret = HPDF_INVALID_PNG_IMAGE;
goto Exit;
}
smask_data = HPDF_GetMem(image->mmgr, width * height);
if (!smask_data) {
HPDF_Dict_Free(smask);
ret = HPDF_FAILD_TO_ALLOC_MEM;
goto Exit;
}
if (ReadTransparentPaletteData(image, png_ptr, info_ptr, smask_data, trans, num_trans) != HPDF_OK) {
HPDF_FreeMem(image->mmgr, smask_data);
HPDF_Dict_Free(smask);
ret = HPDF_INVALID_PNG_IMAGE;
goto Exit;
}
if (HPDF_Stream_Write(smask->stream, smask_data, width * height) != HPDF_OK) {
HPDF_FreeMem(image->mmgr, smask_data);
HPDF_Dict_Free(smask);
ret = HPDF_FILE_IO_ERROR;
goto Exit;
}
HPDF_FreeMem(image->mmgr, smask_data);
ret += CreatePallet(image, png_ptr, info_ptr);
ret += HPDF_Dict_AddNumber (image, "Width", (HPDF_UINT)width);
ret += HPDF_Dict_AddNumber (image, "Height", (HPDF_UINT)height);
ret += HPDF_Dict_AddNumber (image, "BitsPerComponent", (HPDF_UINT)bit_depth);
ret += HPDF_Dict_Add (image, "SMask", smask);
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
return HPDF_OK;
}
no_transparent_color_in_palette:
/* read images with alpha channel right away
we have to do this because image transparent mask must be added to the Xref */
if (xref && PNG_COLOR_MASK_ALPHA & color_type) {
HPDF_Dict smask;
png_bytep smask_data;
smask = HPDF_DictStream_New (image->mmgr, xref);
if (!smask) {
ret = HPDF_FAILD_TO_ALLOC_MEM;
goto Exit;
}
smask->header.obj_class |= HPDF_OSUBCLASS_XOBJECT;
ret = HPDF_Dict_AddName (smask, "Type", "XObject");
ret += HPDF_Dict_AddName (smask, "Subtype", "Image");
ret += HPDF_Dict_AddNumber (smask, "Width", (HPDF_UINT)width);
ret += HPDF_Dict_AddNumber (smask, "Height", (HPDF_UINT)height);
ret += HPDF_Dict_AddName (smask, "ColorSpace", "DeviceGray");
ret += HPDF_Dict_AddNumber (smask, "BitsPerComponent", (HPDF_UINT)bit_depth);
if (ret != HPDF_OK) {
HPDF_Dict_Free(smask);
ret = HPDF_INVALID_PNG_IMAGE;
goto Exit;
}
smask_data = HPDF_GetMem(image->mmgr, width * height);
if (!smask_data) {
HPDF_Dict_Free(smask);
ret = HPDF_FAILD_TO_ALLOC_MEM;
goto Exit;
}
if (ReadTransparentPngData(image, png_ptr, info_ptr, smask_data) != HPDF_OK) {
HPDF_FreeMem(image->mmgr, smask_data);
HPDF_Dict_Free(smask);
ret = HPDF_INVALID_PNG_IMAGE;
goto Exit;
}
if (HPDF_Stream_Write(smask->stream, smask_data, width * height) != HPDF_OK) {
HPDF_FreeMem(image->mmgr, smask_data);
HPDF_Dict_Free(smask);
ret = HPDF_FILE_IO_ERROR;
goto Exit;
}
HPDF_FreeMem(image->mmgr, smask_data);
if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) {
ret += HPDF_Dict_AddName (image, "ColorSpace", "DeviceGray");
} else {
ret += HPDF_Dict_AddName (image, "ColorSpace", "DeviceRGB");
}
ret += HPDF_Dict_AddNumber (image, "Width", (HPDF_UINT)width);
ret += HPDF_Dict_AddNumber (image, "Height", (HPDF_UINT)height);
ret += HPDF_Dict_AddNumber (image, "BitsPerComponent", (HPDF_UINT)bit_depth);
ret += HPDF_Dict_Add (image, "SMask", smask);
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
return HPDF_OK;
}
/* if the image has color palette, copy the pallet of the image to
* create color map.
*/
if (color_type == PNG_COLOR_TYPE_PALETTE)
ret = CreatePallet(image, png_ptr, info_ptr);
else if (color_type == PNG_COLOR_TYPE_GRAY)
ret = HPDF_Dict_AddName (image, "ColorSpace", "DeviceGray");
else
ret = HPDF_Dict_AddName (image, "ColorSpace", "DeviceRGB");
if (ret != HPDF_OK)
goto Exit;
/* read image-data
* if the image is interlaced, read whole image at once.
* if delayed_loading is HPDF_TRUE, the data does not load this phase.
*/
if (delayed_loading) {
image->before_write_fn = PngBeforeWrite;
image->after_write_fn = PngAfterWrite;
} else {
if (png_get_interlace_type(png_ptr, info_ptr) != PNG_INTERLACE_NONE)
ret = ReadPngData_Interlaced(image, png_ptr, info_ptr);
else
ret = ReadPngData(image, png_ptr, info_ptr);
if (ret != HPDF_OK)
goto Exit;
}
/* setting the info of the image. */
if (HPDF_Dict_AddNumber (image, "Width", (HPDF_UINT)width)
!= HPDF_OK)
goto Exit;
if (HPDF_Dict_AddNumber (image, "Height", (HPDF_UINT)height)
!= HPDF_OK)
goto Exit;
if (HPDF_Dict_AddNumber (image, "BitsPerComponent",
(HPDF_UINT)bit_depth) != HPDF_OK)
goto Exit;
/* clean up */
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
return HPDF_OK;
Exit:
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
if (ret != HPDF_OK) {
return ret;
}
return image->error->error_no;
}