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Add wrappers for load/run page
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@gen2brain
gen2brain committed Sep 27, 2024
1 parent a6aa83e commit cf716c7
Showing 1 changed file with 90 additions and 21 deletions.
111 changes: 90 additions & 21 deletions fitz.go
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,30 @@ fz_document *open_document_with_stream(fz_context *ctx, const char *magic, fz_st
return doc;
}
fz_page *load_page(fz_context *ctx, fz_document *doc, int number) {
fz_page *page;
fz_try(ctx) {
page = fz_load_page(ctx, doc, number);
}
fz_catch(ctx) {
return NULL;
}
return page;
}
int run_page_contents(fz_context *ctx, fz_page *page, fz_device *dev, fz_matrix transform, fz_cookie *cookie) {
fz_try(ctx) {
fz_run_page_contents(ctx, page, dev, transform, cookie);
}
fz_catch(ctx) {
return 0;
}
return 1;
}
*/
import "C"

Expand All @@ -53,15 +77,17 @@ import (

// Errors.
var (
ErrNoSuchFile = errors.New("fitz: no such file")
ErrCreateContext = errors.New("fitz: cannot create context")
ErrOpenDocument = errors.New("fitz: cannot open document")
ErrOpenMemory = errors.New("fitz: cannot open memory")
ErrPageMissing = errors.New("fitz: page missing")
ErrCreatePixmap = errors.New("fitz: cannot create pixmap")
ErrPixmapSamples = errors.New("fitz: cannot get pixmap samples")
ErrNeedsPassword = errors.New("fitz: document needs password")
ErrLoadOutline = errors.New("fitz: cannot load outline")
ErrNoSuchFile = errors.New("fitz: no such file")
ErrCreateContext = errors.New("fitz: cannot create context")
ErrOpenDocument = errors.New("fitz: cannot open document")
ErrOpenMemory = errors.New("fitz: cannot open memory")
ErrLoadPage = errors.New("fitz: cannot load page")
ErrRunPageContents = errors.New("fitz: cannot run page contents")
ErrPageMissing = errors.New("fitz: page missing")
ErrCreatePixmap = errors.New("fitz: cannot create pixmap")
ErrPixmapSamples = errors.New("fitz: cannot get pixmap samples")
ErrNeedsPassword = errors.New("fitz: document needs password")
ErrLoadOutline = errors.New("fitz: cannot load outline")
)

// MaxStore is maximum size in bytes of the resource store, before it will start evicting cached resources such as fonts and images.
Expand Down Expand Up @@ -212,7 +238,11 @@ func (f *Document) ImageDPI(pageNumber int, dpi float64) (*image.RGBA, error) {
return nil, ErrPageMissing
}

page := C.fz_load_page(f.ctx, f.doc, C.int(pageNumber))
page := C.load_page(f.ctx, f.doc, C.int(pageNumber))
if page == nil {
return nil, ErrLoadPage
}

defer C.fz_drop_page(f.ctx, page)

var bounds C.fz_rect
Expand All @@ -238,7 +268,10 @@ func (f *Document) ImageDPI(pageNumber int, dpi float64) (*image.RGBA, error) {
defer C.fz_drop_device(f.ctx, device)

drawMatrix := C.fz_identity
C.fz_run_page_contents(f.ctx, page, device, drawMatrix, nil)
ret := C.run_page_contents(f.ctx, page, device, drawMatrix, nil)
if ret == 0 {
return nil, ErrRunPageContents
}

C.fz_close_device(f.ctx, device)

Expand All @@ -264,7 +297,11 @@ func (f *Document) ImagePNG(pageNumber int, dpi float64) ([]byte, error) {
return nil, ErrPageMissing
}

page := C.fz_load_page(f.ctx, f.doc, C.int(pageNumber))
page := C.load_page(f.ctx, f.doc, C.int(pageNumber))
if page == nil {
return nil, ErrLoadPage
}

defer C.fz_drop_page(f.ctx, page)

var bounds C.fz_rect
Expand All @@ -290,7 +327,10 @@ func (f *Document) ImagePNG(pageNumber int, dpi float64) ([]byte, error) {
defer C.fz_drop_device(f.ctx, device)

drawMatrix := C.fz_identity
C.fz_run_page_contents(f.ctx, page, device, drawMatrix, nil)
ret := C.run_page_contents(f.ctx, page, device, drawMatrix, nil)
if ret == 0 {
return nil, ErrRunPageContents
}

C.fz_close_device(f.ctx, device)

Expand All @@ -312,7 +352,11 @@ func (f *Document) Links(pageNumber int) ([]Link, error) {
return nil, ErrPageMissing
}

page := C.fz_load_page(f.ctx, f.doc, C.int(pageNumber))
page := C.load_page(f.ctx, f.doc, C.int(pageNumber))
if page == nil {
return nil, ErrLoadPage
}

defer C.fz_drop_page(f.ctx, page)

links := C.fz_load_links(f.ctx, page)
Expand Down Expand Up @@ -349,7 +393,11 @@ func (f *Document) Text(pageNumber int) (string, error) {
return "", ErrPageMissing
}

page := C.fz_load_page(f.ctx, f.doc, C.int(pageNumber))
page := C.load_page(f.ctx, f.doc, C.int(pageNumber))
if page == nil {
return "", ErrLoadPage
}

defer C.fz_drop_page(f.ctx, page)

var bounds C.fz_rect
Expand All @@ -369,7 +417,10 @@ func (f *Document) Text(pageNumber int) (string, error) {
defer C.fz_drop_device(f.ctx, device)

var cookie C.fz_cookie
C.fz_run_page_contents(f.ctx, page, device, ctm, &cookie)
ret := C.run_page_contents(f.ctx, page, device, ctm, &cookie)
if ret == 0 {
return "", ErrRunPageContents
}

C.fz_close_device(f.ctx, device)

Expand All @@ -390,7 +441,11 @@ func (f *Document) HTML(pageNumber int, header bool) (string, error) {
return "", ErrPageMissing
}

page := C.fz_load_page(f.ctx, f.doc, C.int(pageNumber))
page := C.load_page(f.ctx, f.doc, C.int(pageNumber))
if page == nil {
return "", ErrLoadPage
}

defer C.fz_drop_page(f.ctx, page)

var bounds C.fz_rect
Expand All @@ -410,7 +465,10 @@ func (f *Document) HTML(pageNumber int, header bool) (string, error) {
defer C.fz_drop_device(f.ctx, device)

var cookie C.fz_cookie
C.fz_run_page_contents(f.ctx, page, device, ctm, &cookie)
ret := C.run_page_contents(f.ctx, page, device, ctm, &cookie)
if ret == 0 {
return "", ErrRunPageContents
}

C.fz_close_device(f.ctx, device)

Expand Down Expand Up @@ -444,7 +502,11 @@ func (f *Document) SVG(pageNumber int) (string, error) {
return "", ErrPageMissing
}

page := C.fz_load_page(f.ctx, f.doc, C.int(pageNumber))
page := C.load_page(f.ctx, f.doc, C.int(pageNumber))
if page == nil {
return "", ErrLoadPage
}

defer C.fz_drop_page(f.ctx, page)

var bounds C.fz_rect
Expand All @@ -465,7 +527,10 @@ func (f *Document) SVG(pageNumber int) (string, error) {
defer C.fz_drop_device(f.ctx, device)

var cookie C.fz_cookie
C.fz_run_page_contents(f.ctx, page, device, ctm, &cookie)
ret := C.run_page_contents(f.ctx, page, device, ctm, &cookie)
if ret == 0 {
return "", ErrRunPageContents
}

C.fz_close_device(f.ctx, device)
C.fz_close_output(f.ctx, out)
Expand Down Expand Up @@ -545,7 +610,11 @@ func (f *Document) Bound(pageNumber int) (image.Rectangle, error) {
return image.Rectangle{}, ErrPageMissing
}

page := C.fz_load_page(f.ctx, f.doc, C.int(pageNumber))
page := C.load_page(f.ctx, f.doc, C.int(pageNumber))
if page == nil {
return image.Rectangle{}, ErrLoadPage
}

defer C.fz_drop_page(f.ctx, page)

var bounds C.fz_rect
Expand Down

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