SkPDFResourceDict.cpp File Reference

#include "include/core/SkStream.h"
#include "src/pdf/SkPDFResourceDict.h"
#include "src/pdf/SkPDFTypes.h"

Go to the source code of this file.

Functions
static char *	get_resource_name (char dst[kMaxResourceNameLength], SkPDFResourceType type, int key)
void	SkPDFWriteResourceName (SkWStream *dst, SkPDFResourceType type, int key)
static const char *	resource_name (SkPDFResourceType type)
static SkString	resource (SkPDFResourceType type, int index)
static void	add_subdict (const std::vector< SkPDFIndirectReference > &resourceList, SkPDFResourceType type, SkPDFDict *dst)
static std::unique_ptr< SkPDFArray >	make_proc_set ()
std::unique_ptr< SkPDFDict >	SkPDFMakeResourceDict (const std::vector< SkPDFIndirectReference > &graphicStateResources, const std::vector< SkPDFIndirectReference > &shaderResources, const std::vector< SkPDFIndirectReference > &xObjectResources, const std::vector< SkPDFIndirectReference > &fontResources)

Variables
constexpr size_t	kMaxResourceNameLength = 1 + kSkStrAppendS32_MaxSize

Function Documentation

add_subdict()

static void add_subdict ( const std::vector< SkPDFIndirectReference > &  resourceList, SkPDFResourceType  type, SkPDFDict *  dst  )

static

Definition at line 62 of file SkPDFResourceDict.cpp.

                                        {
    if (!resourceList.empty()) {
        auto resources = SkPDFMakeDict();
        for (SkPDFIndirectReference ref : resourceList) {
            resources->insertRef(resource(type, ref.fValue), ref);
        }
        dst->insertObject(resource_name(type), std::move(resources));
    }
}

get_resource_name()

static char * get_resource_name ( char  dst[kMaxResourceNameLength], SkPDFResourceType  type, int  key  )

static

Definition at line 25 of file SkPDFResourceDict.cpp.

                                                                                                  {
    static const char kResourceTypePrefixes[] = {
        'G',  // kExtGState
        'P',  // kPattern
        'X',  // kXObject
        'F'   // kFont
    };
    SkASSERT((unsigned)type < std::size(kResourceTypePrefixes));
    dst[0] = kResourceTypePrefixes[(unsigned)type];
    return SkStrAppendS32(dst + 1, key);
}

make_proc_set()

static std::unique_ptr< SkPDFArray > make_proc_set ( )

static

Definition at line 74 of file SkPDFResourceDict.cpp.

                                                 {
    auto procSets = SkPDFMakeArray();
    static const char kProcs[][7] = { "PDF", "Text", "ImageB", "ImageC", "ImageI"};
    procSets->reserve(std::size(kProcs));
    for (const char* proc : kProcs) {
        procSets->appendName(proc);
    }
    return procSets;
}

resource()

static SkString resource ( SkPDFResourceType  type, int  index  )

static

Definition at line 56 of file SkPDFResourceDict.cpp.

                                                            {
    char buffer[kMaxResourceNameLength];
    char* end = get_resource_name(buffer, type, index);
    return SkString(buffer, (size_t)(end - buffer));
}

resource_name()

static const char * resource_name ( SkPDFResourceType  type )

static

Definition at line 45 of file SkPDFResourceDict.cpp.

                                                         {
    static const char* kResourceTypeNames[] = {
        "ExtGState",
        "Pattern",
        "XObject",
        "Font"
    };
    SkASSERT((unsigned)type < std::size(kResourceTypeNames));
    return kResourceTypeNames[(unsigned)type];
}

SkPDFMakeResourceDict()

std::unique_ptr< SkPDFDict > SkPDFMakeResourceDict	(	const std::vector< SkPDFIndirectReference > &	graphicStateResources,
		const std::vector< SkPDFIndirectReference > &	shaderResources,
		const std::vector< SkPDFIndirectReference > &	xObjectResources,
		const std::vector< SkPDFIndirectReference > &	fontResources
	)

Create a PDF resource dictionary. The full set of ProcSet entries is automatically created for backwards compatibility, as recommended by the PDF spec.

Any arguments can be nullptr.

Definition at line 84 of file SkPDFResourceDict.cpp.

                                                                {
    auto dict = SkPDFMakeDict();
    dict->insertObject("ProcSet", make_proc_set());
    add_subdict(graphicStateResources, SkPDFResourceType::kExtGState, dict.get());
    add_subdict(shaderResources,       SkPDFResourceType::kPattern,   dict.get());
    add_subdict(xObjectResources,      SkPDFResourceType::kXObject,   dict.get());
    add_subdict(fontResources,         SkPDFResourceType::kFont,      dict.get());
    return dict;
}

SkPDFWriteResourceName()

void SkPDFWriteResourceName	(	SkWStream *	dst,
		SkPDFResourceType	type,
		int	key
	)

Writes the name for the resource that will be generated by the resource dict.

Parameters

type	The type of resource being entered
key	The resource key, should be unique within its type.

Definition at line 37 of file SkPDFResourceDict.cpp.

                                                                             {
    // One extra character for the leading '/'.
    char buffer[1 + kMaxResourceNameLength];
    buffer[0] = '/';
    char* end = get_resource_name(buffer + 1, type, key);
    dst->write(buffer, (size_t)(end - buffer));
}

Variable Documentation

kMaxResourceNameLength

constexpr size_t kMaxResourceNameLength = 1 + kSkStrAppendS32_MaxSize

constexpr

Definition at line 22 of file SkPDFResourceDict.cpp.