/*
* Class: org_libharu_PdfPage
* Method: drawPngImage
* Signature: ([BFFFF)V
*/
JNIEXPORT void JNICALL
Java_org_libharu_PdfPage_drawPngImage(JNIEnv *env, jobject obj, jbyteArray imageData, jfloat x,
jfloat y, jfloat width, jfloat height) {
jint page, pdf;
jbyte* buffer; /* The image data as a jbyte[] (really signed char[]) */
jsize len; /* The number of elements in the image byte array */
/* Get mHPDFPagePointer */
page = (*env)->GetIntField(env, obj, mHPDFPagePointer);
/* Get mParentHPDFDocPointer */
pdf = (*env)->GetIntField(env, obj, mParentHPDFDocPointer);
/* Get the image data as a native byte array */
buffer = (*env)->GetByteArrayElements(env, imageData, NULL);
/* Get the number of elements in the image byte array */
len = (*env)->GetArrayLength(env, imageData);
/* Load an HPDF_Image from the image byte array */
HPDF_Image image = HPDF_LoadPngImageFromMem((HPDF_Doc) pdf, (HPDF_BYTE*) buffer,
(HPDF_UINT) (len * sizeof(jbyte)));
/* Actually draw the image */
HPDF_Page_DrawImage((HPDF_Page) page, image, (HPDF_REAL) x, (HPDF_REAL) y, (HPDF_REAL) width,
(HPDF_REAL) height);
/* Release (free) the native byte array */
(*env)->ReleaseByteArrayElements(env, imageData, buffer, JNI_ABORT);
}
void WPdfImage::drawImage(const WRectF& rect, const std::string& imgUrl,
int imgWidth, int imgHeight,
const WRectF& srect)
{
HPDF_Image img = 0;
if (Uri::isDataUri(imgUrl)) {
Uri::Uri uri = Uri::parseDataUri(imgUrl);
if ("image/png" == uri.mimeType)
img = HPDF_LoadPngImageFromMem(pdf_,
(HPDF_BYTE*)uri.data.c_str(),
uri.data.size());
else if ("image/jpeg" == uri.mimeType)
img = HPDF_LoadJpegImageFromMem(pdf_,
(HPDF_BYTE*)uri.data.c_str(),
uri.data.size());
} else {
std::string mimeType = Image::identifyImageFileMimeType(imgUrl);
if ("image/png" == mimeType)
img = HPDF_LoadPngImageFromFile2(pdf_, imgUrl.c_str());
else if ("image/jpeg" == mimeType)
img = HPDF_LoadJpegImageFromFile(pdf_, imgUrl.c_str());
}
if (!img)
throw WException("WPdfImage::drawImage(): cannot load image: " + imgUrl);
double x = rect.x();
double y = rect.y();
double width = rect.width();
double height = rect.height();
HPDF_Page_GSave(page_);
if (srect.x() != 0
|| srect.y() != 0
|| srect.width() != imgWidth
|| srect.height() != imgHeight) {
double scaleX = width / imgWidth;
double scaleY = height / imgHeight;
x -= srect.x() * scaleX;
y -= srect.y() * scaleY;
width *= scaleX;
height *= scaleY;
HPDF_Page_Rectangle(page_, rect.x(), rect.y(), rect.width(), rect.height());
HPDF_Page_Clip(page_);
}
HPDF_Page_Concat(page_, 1, 0, 0, -1, x, y + height); // revert upside-down
HPDF_Page_DrawImage(page_, img, 0, 0, width, height);
HPDF_Page_GRestore(page_);
}
int main (int argc, char **argv)
{
HPDF_Doc pdf;
HPDF_Font font;
HPDF_Page page;
char fname[256];
HPDF_Image image;
char *png_image_data;
FILE *fp;
HPDF_REAL x, y;
strcpy (fname, argv[0]);
strcat (fname, ".pdf");
pdf = HPDF_New (error_handler, NULL);
if (!pdf) {
printf ("error: cannot create PdfDoc object\n");
return 1;
}
/* error-handler */
if (setjmp(env)) {
HPDF_Free (pdf);
return 1;
}
HPDF_SetCompressionMode (pdf, HPDF_COMP_ALL);
/* create default-font */
font = HPDF_GetFont (pdf, "Helvetica", NULL);
/* add a new page object. */
page = HPDF_AddPage (pdf);
HPDF_Page_BeginText (page);
HPDF_Page_SetFontAndSize (page, font, 20);
HPDF_Page_MoveTextPos (page, 220, HPDF_Page_GetHeight (page) - 70);
HPDF_Page_ShowText (page, "RawImageDemo");
HPDF_Page_EndText (page);
int n;
fp = fopen("2.png", "r");
png_image_data = malloc(1024*1024);
n = fread(png_image_data, 1, 1024*1024, fp);
fclose(fp);
/* load GrayScale raw-image (1bit) file from memory. */
image = HPDF_LoadPngImageFromMem (pdf, png_image_data, n);
/* Draw image to the canvas. (normal-mode with actual size.)*/
HPDF_Page_DrawImage (page, image, 20, 20, 1024, 768);
free(png_image_data);
/* save the document to a file */
HPDF_SaveToFile (pdf, fname);
/* clean up */
HPDF_Free (pdf);
return 0;
}
void WPdfImage::drawImage(const WRectF& rect, const std::string& imgUrl,
int imgWidth, int imgHeight,
const WRectF& srect)
{
HPDF_Image img = nullptr;
if (DataUri::isDataUri(imgUrl)) {
#define HAVE_LOAD_FROM_MEM HPDF_MAJOR_VERSION > 2 || (HPDF_MAJOR_VERSION == 2 && (HPDF_MINOR_VERSION >= 2))
#if HAVE_LOAD_FROM_MEM
DataUri uri(imgUrl);
if ("image/png" == uri.mimeType)
img = HPDF_LoadPngImageFromMem(pdf_,
(HPDF_BYTE*)&uri.data[0],
uri.data.size());
else if ("image/jpeg" == uri.mimeType)
img = HPDF_LoadJpegImageFromMem(pdf_,
(HPDF_BYTE*)&uri.data[0],
uri.data.size());
#else
LOG_ERROR("drawImage: data URI support requires libharu 2.2.0 or later");
#endif
} else {
std::string mimeType = ImageUtils::identifyMimeType(imgUrl);
if ("image/png" == mimeType)
img = HPDF_LoadPngImageFromFile2(pdf_, imgUrl.c_str());
else if ("image/jpeg" == mimeType)
img = HPDF_LoadJpegImageFromFile(pdf_, imgUrl.c_str());
}
if (!img)
throw WException("WPdfImage::drawImage(): cannot load image: " + imgUrl);
double x = rect.x();
double y = rect.y();
double width = rect.width();
double height = rect.height();
HPDF_Page_GSave(page_);
if (srect.x() != 0
|| srect.y() != 0
|| srect.width() != imgWidth
|| srect.height() != imgHeight) {
double scaleX = width / imgWidth;
double scaleY = height / imgHeight;
x -= srect.x() * scaleX;
y -= srect.y() * scaleY;
width *= scaleX;
height *= scaleY;
HPDF_Page_Rectangle(page_, rect.x(), rect.y(), rect.width(), rect.height());
HPDF_Page_Clip(page_);
}
HPDF_Page_Concat(page_, 1, 0, 0, -1, x, y + height); // revert upside-down
HPDF_Page_DrawImage(page_, img, 0, 0, width, height);
HPDF_Page_GRestore(page_);
}
