static void nativeSetTransformAndClip(JNIEnv* env, jclass thiz, jlong documentPtr, jint pageIndex,
jlong transformPtr, jint clipLeft, jint clipTop, jint clipRight, jint clipBottom) {
FPDF_DOCUMENT document = reinterpret_cast<FPDF_DOCUMENT>(documentPtr);
CPDF_Page* page = (CPDF_Page*) FPDF_LoadPage(document, pageIndex);
if (!page) {
jniThrowException(env, "java/lang/IllegalStateException",
"cannot open page");
return;
}
double width = 0;
double height = 0;
const int result = FPDF_GetPageSizeByIndex(document, pageIndex, &width, &height);
if (!result) {
jniThrowException(env, "java/lang/IllegalStateException",
"cannot get page size");
return;
}
CFX_AffineMatrix matrix;
SkMatrix* skTransform = reinterpret_cast<SkMatrix*>(transformPtr);
SkScalar transformValues[6];
if (!skTransform->asAffine(transformValues)) {
jniThrowException(env, "java/lang/IllegalArgumentException",
"transform matrix has perspective. Only affine matrices are allowed.");
return;
}
// PDF's coordinate system origin is left-bottom while in graphics it
// is the top-left. So, translate the PDF coordinates to ours.
matrix.Set(1, 0, 0, -1, 0, page->GetPageHeight());
// Apply the transformation what was created in our coordinates.
matrix.Concat(transformValues[SkMatrix::kAScaleX], transformValues[SkMatrix::kASkewY],
transformValues[SkMatrix::kASkewX], transformValues[SkMatrix::kAScaleY],
transformValues[SkMatrix::kATransX], transformValues[SkMatrix::kATransY]);
// Translate the result back to PDF coordinates.
matrix.Concat(1, 0, 0, -1, 0, page->GetPageHeight());
FS_MATRIX transform = {matrix.a, matrix.b, matrix.c, matrix.d, matrix.e, matrix.f};
FS_RECTF clip = {(float) clipLeft, (float) clipTop, (float) clipRight, (float) clipBottom};
FPDFPage_TransFormWithClip(page, &transform, &clip);
FPDF_ClosePage(page);
}
void CFFL_InteractiveFormFiller::QueryWherePopup(
const CPWL_Wnd::PrivateData* pAttached,
float fPopupMin,
float fPopupMax,
bool* bBottom,
float* fPopupRet) {
auto* pData = static_cast<const CFFL_PrivateData*>(pAttached);
CPDFSDK_Widget* pWidget = pData->pWidget;
CPDF_Page* pPage = pWidget->GetPDFPage();
CFX_FloatRect rcPageView(0, pPage->GetPageHeight(), pPage->GetPageWidth(), 0);
rcPageView.Normalize();
CFX_FloatRect rcAnnot = pWidget->GetRect();
float fTop = 0.0f;
float fBottom = 0.0f;
switch (pWidget->GetRotate() / 90) {
default:
case 0:
fTop = rcPageView.top - rcAnnot.top;
fBottom = rcAnnot.bottom - rcPageView.bottom;
break;
case 1:
fTop = rcAnnot.left - rcPageView.left;
fBottom = rcPageView.right - rcAnnot.right;
break;
case 2:
fTop = rcAnnot.bottom - rcPageView.bottom;
fBottom = rcPageView.top - rcAnnot.top;
break;
case 3:
fTop = rcPageView.right - rcAnnot.right;
fBottom = rcAnnot.left - rcPageView.left;
break;
}
constexpr float kMaxListBoxHeight = 140;
const float fMaxListBoxHeight =
pdfium::clamp(kMaxListBoxHeight, fPopupMin, fPopupMax);
if (fBottom > fMaxListBoxHeight) {
*fPopupRet = fMaxListBoxHeight;
*bBottom = true;
return;
}
if (fTop > fMaxListBoxHeight) {
*fPopupRet = fMaxListBoxHeight;
*bBottom = false;
return;
}
if (fTop > fBottom) {
*fPopupRet = fTop;
*bBottom = false;
} else {
*fPopupRet = fBottom;
*bBottom = true;
}
}
static void CheckRotate(CPDF_Page& page, CFX_FloatRect& page_bbox)
{
int total_count = 0, rotated_count[3] = {0, 0, 0};
FX_POSITION pos = page.GetFirstObjectPosition();
while (pos) {
CPDF_PageObject* pObj = page.GetNextObject(pos);
if (pObj->m_Type != PDFPAGE_TEXT) {
continue;
}
total_count ++;
CPDF_TextObject* pText = (CPDF_TextObject*)pObj;
FX_FLOAT angle = pText->m_TextState.GetBaselineAngle();
if (angle == 0.0) {
continue;
}
int degree = (int)(angle * 180 / PI + 0.5);
if (degree % 90) {
continue;
}
if (degree < 0) {
degree += 360;
}
int index = degree / 90 % 3 - 1;
if (index < 0) {
continue;
}
rotated_count[index] ++;
}
if (total_count == 0) {
return;
}
CFX_AffineMatrix matrix;
if (rotated_count[0] > total_count * 2 / 3) {
matrix.Set(0, -1, 1, 0, 0, page.GetPageHeight());
} else if (rotated_count[1] > total_count * 2 / 3) {
matrix.Set(-1, 0, 0, -1, page.GetPageWidth(), page.GetPageHeight());
} else if (rotated_count[2] > total_count * 2 / 3) {
matrix.Set(0, 1, -1, 0, page.GetPageWidth(), 0);
} else {
return;
}
page.Transform(matrix);
page_bbox.Transform(&matrix);
}
DLLEXPORT int STDCALL FPDF_GetPageSizeByIndex(FPDF_DOCUMENT document, int page_index, double* width, double* height)
{
CPDF_Document* pDoc = (CPDF_Document*)document;
if(pDoc == NULL)
return FALSE;
CPDF_Dictionary* pDict = pDoc->GetPage(page_index);
if (pDict == NULL) return FALSE;
CPDF_Page page;
page.Load(pDoc, pDict);
*width = page.GetPageWidth();
*height = page.GetPageHeight();
return TRUE;
}
static void renderPageBitmap(FPDF_BITMAP bitmap, FPDF_PAGE page, int destLeft, int destTop,
int destRight, int destBottom, SkMatrix* transform, int flags) {
// Note: this code ignores the currently unused RENDER_NO_NATIVETEXT,
// FPDF_RENDER_LIMITEDIMAGECACHE, FPDF_RENDER_FORCEHALFTONE, FPDF_GRAYSCALE,
// and FPDF_ANNOT flags. To add support for that refer to FPDF_RenderPage_Retail
// in fpdfview.cpp
CRenderContext* pContext = FX_NEW CRenderContext;
CPDF_Page* pPage = (CPDF_Page*) page;
pPage->SetPrivateData((void*) 1, pContext, DropContext);
CFX_FxgeDevice* fxgeDevice = FX_NEW CFX_FxgeDevice;
pContext->m_pDevice = fxgeDevice;
// Reverse the bytes (last argument TRUE) since the Android
// format is ARGB while the renderer uses BGRA internally.
fxgeDevice->Attach((CFX_DIBitmap*) bitmap, 0, TRUE);
CPDF_RenderOptions* renderOptions = pContext->m_pOptions;
if (!renderOptions) {
renderOptions = FX_NEW CPDF_RenderOptions;
pContext->m_pOptions = renderOptions;
}
if (flags & FPDF_LCD_TEXT) {
renderOptions->m_Flags |= RENDER_CLEARTYPE;
} else {
renderOptions->m_Flags &= ~RENDER_CLEARTYPE;
}
const CPDF_OCContext::UsageType usage = (flags & FPDF_PRINTING)
? CPDF_OCContext::Print : CPDF_OCContext::View;
renderOptions->m_AddFlags = flags >> 8;
renderOptions->m_pOCContext = new CPDF_OCContext(pPage->m_pDocument, usage);
fxgeDevice->SaveState();
FX_RECT clip;
clip.left = destLeft;
clip.right = destRight;
clip.top = destTop;
clip.bottom = destBottom;
fxgeDevice->SetClip_Rect(&clip);
CPDF_RenderContext* pageContext = FX_NEW CPDF_RenderContext;
pContext->m_pContext = pageContext;
pageContext->Create(pPage);
CFX_AffineMatrix matrix;
if (!transform) {
pPage->GetDisplayMatrix(matrix, destLeft, destTop, destRight - destLeft,
destBottom - destTop, 0);
} else {
// PDF's coordinate system origin is left-bottom while
// in graphics it is the top-left, so remap the origin.
matrix.Set(1, 0, 0, -1, 0, pPage->GetPageHeight());
SkScalar transformValues[6];
transform->asAffine(transformValues);
matrix.Concat(transformValues[SkMatrix::kAScaleX], transformValues[SkMatrix::kASkewY],
transformValues[SkMatrix::kASkewX], transformValues[SkMatrix::kAScaleY],
transformValues[SkMatrix::kATransX], transformValues[SkMatrix::kATransY]);
}
pageContext->AppendObjectList(pPage, &matrix);
pContext->m_pRenderer = FX_NEW CPDF_ProgressiveRenderer;
pContext->m_pRenderer->Start(pageContext, fxgeDevice, renderOptions, NULL);
fxgeDevice->RestoreState();
pPage->RemovePrivateData((void*) 1);
delete pContext;
}