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fpdf_progressive.go
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fpdf_progressive.go
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package shared_tests
import (
"io/ioutil"
"github.com/michalderdak/go-pdfium/enums"
"github.com/michalderdak/go-pdfium/references"
"github.com/michalderdak/go-pdfium/requests"
"github.com/michalderdak/go-pdfium/responses"
. "github.com/onsi/ginkgo/v2"
. "github.com/onsi/gomega"
)
var _ = Describe("fpdf_progressive", func() {
BeforeEach(func() {
if TestType == "multi" {
Skip("Multi-threaded usage does not support setting callbacks")
}
Locker.Lock()
})
AfterEach(func() {
if TestType == "multi" {
Skip("Multi-threaded usage does not support setting callbacks")
}
Locker.Unlock()
})
Context("no page", func() {
When("is opened", func() {
It("returns an error when calling FPDF_RenderPageBitmap_Start", func() {
FPDF_RenderPageBitmap_Start, err := PdfiumInstance.FPDF_RenderPageBitmap_Start(&requests.FPDF_RenderPageBitmap_Start{})
Expect(err).To(MatchError("either page reference or index should be given"))
Expect(FPDF_RenderPageBitmap_Start).To(BeNil())
})
It("returns an error when calling FPDF_RenderPage_Continue", func() {
FPDF_RenderPage_Continue, err := PdfiumInstance.FPDF_RenderPage_Continue(&requests.FPDF_RenderPage_Continue{})
Expect(err).To(MatchError("either page reference or index should be given"))
Expect(FPDF_RenderPage_Continue).To(BeNil())
})
It("returns an error when calling FPDF_RenderPage_Close", func() {
FPDF_RenderPage_Close, err := PdfiumInstance.FPDF_RenderPage_Close(&requests.FPDF_RenderPage_Close{})
Expect(err).To(MatchError("either page reference or index should be given"))
Expect(FPDF_RenderPage_Close).To(BeNil())
})
})
})
Context("a normal PDF file", func() {
var doc references.FPDF_DOCUMENT
BeforeEach(func() {
pdfData, err := ioutil.ReadFile(TestDataPath + "/testdata/text_form.pdf")
Expect(err).To(BeNil())
newDoc, err := PdfiumInstance.FPDF_LoadMemDocument(&requests.FPDF_LoadMemDocument{
Data: &pdfData,
})
Expect(err).To(BeNil())
doc = newDoc.Document
})
AfterEach(func() {
FPDF_CloseDocument, err := PdfiumInstance.FPDF_CloseDocument(&requests.FPDF_CloseDocument{
Document: doc,
})
Expect(err).To(BeNil())
Expect(FPDF_CloseDocument).To(Not(BeNil()))
})
When("is opened", func() {
When("no bitmap is given", func() {
It("returns an error when calling FPDF_RenderPageBitmap_Start", func() {
FPDF_RenderPageBitmap_Start, err := PdfiumInstance.FPDF_RenderPageBitmap_Start(&requests.FPDF_RenderPageBitmap_Start{
Page: requests.Page{
ByIndex: &requests.PageByIndex{
Document: doc,
Index: 0,
},
},
})
Expect(err).To(MatchError("bitmap not given"))
Expect(FPDF_RenderPageBitmap_Start).To(BeNil())
})
})
When("no callback is given", func() {
It("returns an error when calling FPDF_RenderPageBitmap_Start", func() {
By("creating a bitmap")
FPDFBitmap_Create, err := PdfiumInstance.FPDFBitmap_Create(&requests.FPDFBitmap_Create{
Width: 1000,
Height: 1000,
Alpha: 1,
})
Expect(err).To(BeNil())
Expect(FPDFBitmap_Create).To(Not(BeNil()))
Expect(FPDFBitmap_Create.Bitmap).To(Not(BeNil()))
By("calling FPDF_RenderPageBitmap_Start")
FPDF_RenderPageBitmap_Start, err := PdfiumInstance.FPDF_RenderPageBitmap_Start(&requests.FPDF_RenderPageBitmap_Start{
Page: requests.Page{
ByIndex: &requests.PageByIndex{
Document: doc,
Index: 0,
},
},
Bitmap: FPDFBitmap_Create.Bitmap,
})
Expect(err).To(MatchError("NeedToPauseNowCallback can't be nil"))
Expect(FPDF_RenderPageBitmap_Start).To(BeNil())
By("destroying the bitmap")
FPDFBitmap_Destroy, err := PdfiumInstance.FPDFBitmap_Destroy(&requests.FPDFBitmap_Destroy{
Bitmap: FPDFBitmap_Create.Bitmap,
})
Expect(err).To(BeNil())
Expect(FPDFBitmap_Destroy).To(Equal(&responses.FPDFBitmap_Destroy{}))
})
})
It("can be rendered progressively", func() {
By("creating a bitmap")
FPDFBitmap_Create, err := PdfiumInstance.FPDFBitmap_Create(&requests.FPDFBitmap_Create{
Width: 1000,
Height: 1000,
Alpha: 1,
})
Expect(err).To(BeNil())
Expect(FPDFBitmap_Create).To(Not(BeNil()))
Expect(FPDFBitmap_Create.Bitmap).To(Not(BeNil()))
By("starting the progressive rendering and directly pausing it")
FPDF_RenderPageBitmap_Start, err := PdfiumInstance.FPDF_RenderPageBitmap_Start(&requests.FPDF_RenderPageBitmap_Start{
Page: requests.Page{
ByIndex: &requests.PageByIndex{
Document: doc,
Index: 0,
},
},
Bitmap: FPDFBitmap_Create.Bitmap,
StartX: 0,
StartY: 0,
SizeX: 1000,
SizeY: 1000,
Rotate: enums.FPDF_PAGE_ROTATION_NONE,
Flags: 0,
NeedToPauseNowCallback: func() bool {
return true
},
})
Expect(err).To(BeNil())
Expect(FPDF_RenderPageBitmap_Start).To(Equal(&responses.FPDF_RenderPageBitmap_Start{
RenderStatus: enums.FPDF_RENDER_STATUS_TOBECONTINUED,
}))
By("starting the continuing the rendering and pausing it again")
FPDF_RenderPage_Continue, err := PdfiumInstance.FPDF_RenderPage_Continue(&requests.FPDF_RenderPage_Continue{
Page: requests.Page{
ByIndex: &requests.PageByIndex{
Document: doc,
Index: 0,
},
},
NeedToPauseNowCallback: func() bool {
return true
},
})
Expect(err).To(BeNil())
Expect(FPDF_RenderPage_Continue).To(Equal(&responses.FPDF_RenderPage_Continue{
RenderStatus: enums.FPDF_RENDER_STATUS_DONE,
}))
By("cleaning up the resources")
FPDF_RenderPage_Close, err := PdfiumInstance.FPDF_RenderPage_Close(&requests.FPDF_RenderPage_Close{
Page: requests.Page{
ByIndex: &requests.PageByIndex{
Document: doc,
Index: 0,
},
},
})
Expect(err).To(BeNil())
Expect(FPDF_RenderPage_Close).To(Equal(&responses.FPDF_RenderPage_Close{}))
By("destroying the bitmap")
FPDFBitmap_Destroy, err := PdfiumInstance.FPDFBitmap_Destroy(&requests.FPDFBitmap_Destroy{
Bitmap: FPDFBitmap_Create.Bitmap,
})
Expect(err).To(BeNil())
Expect(FPDFBitmap_Destroy).To(Equal(&responses.FPDFBitmap_Destroy{}))
})
})
})
})