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https://github.com/michaelrsweet/pdfio.git
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Add PNG predictor test page (yes, we have problems)
This commit is contained in:
Michael R Sweet
parent
97846e0f34
commit
2856b440d1
@ -653,6 +653,8 @@ pdfioStreamWrite(
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*prevptr; // Previous raw buffer
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PDFIO_DEBUG("pdfioStreamWrite(st=%p, buffer=%p, bytes=%lu)\n", st, buffer, (unsigned long)bytes);
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// Range check input...
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if (!st || st->pdf->mode != _PDFIO_MODE_WRITE || !buffer || !bytes)
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return (false);
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@ -679,7 +681,7 @@ pdfioStreamWrite(
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{
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// Store the PNG predictor in the first byte of the buffer...
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if (st->predictor == _PDFIO_PREDICTOR_PNG_AUTO)
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st->pbuffers[st->pbcurrent][0] = 4;
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st->pbuffers[st->pbcurrent][0] = 4; // Use Paeth predictor for auto...
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else
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st->pbuffers[st->pbcurrent][0] = (unsigned char)(st->predictor - 10);
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@ -693,6 +695,11 @@ pdfioStreamWrite(
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// Anti-compiler-warning code (NONE is handled above, TIFF is not supported for writing)
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return (false);
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case _PDFIO_PREDICTOR_PNG_NONE :
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// No PNG predictor...
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memcpy(thisptr, buffer, pbline);
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break;
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case _PDFIO_PREDICTOR_PNG_SUB :
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// Encode the difference from the previous column
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for (remaining = pbline; remaining > 0; remaining --, bufptr ++, thisptr ++)
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@ -741,6 +748,7 @@ pdfioStreamWrite(
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return (false);
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st->pbcurrent = !st->pbcurrent;
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bytes -= pbline;
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}
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return (true);
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262
testpdfio.c
262
testpdfio.c
@ -22,11 +22,14 @@
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static int do_test_file(const char *filename);
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static int do_unit_tests(void);
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static int draw_image(pdfio_stream_t *st, const char *name, double x, double y, double w, double h, const char *label);
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static bool error_cb(pdfio_file_t *pdf, const char *message, bool *error);
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static ssize_t token_consume_cb(const char **s, size_t bytes);
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static ssize_t token_peek_cb(const char **s, char *buffer, size_t bytes);
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static int write_color_patch(pdfio_stream_t *st, bool device);
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static int write_color_test(pdfio_file_t *pdf, int number, pdfio_obj_t *font);
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static pdfio_obj_t *write_image_object(pdfio_file_t *pdf, _pdfio_predictor_t predictor);
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static int write_images(pdfio_file_t *pdf, int number, pdfio_obj_t *font);
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static int write_page(pdfio_file_t *pdf, int number, pdfio_obj_t *font, pdfio_obj_t *image);
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static int write_text(pdfio_file_t *pdf, int first_page, pdfio_obj_t *font, const char *filename);
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@ -264,8 +267,12 @@ do_unit_tests(void)
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if (write_color_test(outpdf, 5, helvetica))
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return (1);
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// Write a page with test images...
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if (write_images(outpdf, 6, helvetica))
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return (1);
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// Print this text file...
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if (write_text(outpdf, 6, helvetica, "README.md"))
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if (write_text(outpdf, 7, helvetica, "README.md"))
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return (1);
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// Close the test PDF file...
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@ -286,6 +293,59 @@ do_unit_tests(void)
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}
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//
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// 'draw_image()' - Draw an image with a label.
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//
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static int // O - 1 on failure, 0 on success
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draw_image(pdfio_stream_t *st,
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const char *name, // I - Name
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double x, // I - X offset
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double y, // I - Y offset
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double w, // I - Image width
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double h, // I - Image height
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const char *label) // I - Label
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{
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printf("pdfioContentDrawImage(name=\"%s\", x=%g, y=%g, w=%g, h=%g): ", name, x, y, w, h);
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if (pdfioContentDrawImage(st, name, x, y, w, h))
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puts("PASS");
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else
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return (1);
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fputs("pdfioContentTextBegin(): ", stdout);
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if (pdfioContentTextBegin(st))
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puts("PASS");
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else
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return (1);
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fputs("pdfioContentSetTextFont(\"F1\", 18.0): ", stdout);
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if (pdfioContentSetTextFont(st, "F1", 18.0))
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puts("PASS");
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else
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return (1);
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printf("pdfioContentTextMoveTo(%g, %g): ", x, y + h + 9);
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if (pdfioContentTextMoveTo(st, x, y + h + 9))
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puts("PASS");
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else
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return (1);
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printf("pdfioContentTextShow(\"%s\"): ", label);
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if (pdfioContentTextShow(st, label))
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puts("PASS");
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else
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return (1);
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fputs("pdfioContentTextEnd(): ", stdout);
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if (pdfioContentTextEnd(st))
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puts("PASS");
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else
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return (1);
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return (0);
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}
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//
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// 'error_cb()' - Display an error message during a unit test.
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//
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@ -758,6 +818,204 @@ write_color_test(pdfio_file_t *pdf, // I - PDF file
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}
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//
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// 'write_image_object()' - Write an image object using the specified predictor.
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//
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static pdfio_obj_t * // O - Image object
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write_image_object(
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pdfio_file_t *pdf, // I - PDF file
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_pdfio_predictor_t predictor) // I - Predictor to use
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{
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pdfio_dict_t *dict, // Image dictionary
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*decode; // Decode dictionary
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pdfio_obj_t *obj; // Image object
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pdfio_stream_t *st; // Image stream
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int x, y; // Coordinates in image
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unsigned char buffer[768], // Buffer for image
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*bufptr; // Pointer into buffer
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// Create the image dictionary...
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if ((dict = pdfioDictCreate(pdf)) == NULL)
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return (NULL);
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pdfioDictSetName(dict, "Type", "XObject");
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pdfioDictSetName(dict, "Subtype", "Image");
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pdfioDictSetNumber(dict, "Width", 256);
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pdfioDictSetNumber(dict, "Height", 256);
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pdfioDictSetNumber(dict, "BitsPerComponent", 8);
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pdfioDictSetName(dict, "ColorSpace", "DeviceRGB");
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pdfioDictSetName(dict, "Filter", "FlateDecode");
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if ((decode = pdfioDictCreate(pdf)) == NULL)
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return (NULL);
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pdfioDictSetNumber(decode, "BitsPerComponent", 8);
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pdfioDictSetNumber(decode, "Colors", 3);
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pdfioDictSetNumber(decode, "Columns", 256);
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pdfioDictSetNumber(decode, "Predictor", predictor);
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pdfioDictSetDict(dict, "DecodeParms", decode);
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// Create the image object...
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if ((obj = pdfioFileCreateObject(pdf, dict)) == NULL)
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return (NULL);
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// Create the image stream and write the image...
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if ((st = pdfioObjCreateStream(obj, PDFIO_FILTER_FLATE)) == NULL)
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return (NULL);
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for (y = 0; y < 256; y ++)
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{
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for (x = 0, bufptr = buffer; x < 256; x ++, bufptr += 3)
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{
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bufptr[0] = y;
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bufptr[1] = y + x;
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bufptr[2] = y - x;
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}
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if (!pdfioStreamWrite(st, buffer, sizeof(buffer)))
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return (NULL);
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}
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pdfioStreamClose(st);
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return (obj);
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}
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//
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// 'write_images()' - Write a series of test images.
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//
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static int // O - 1 on failure, 0 on success
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write_images(pdfio_file_t *pdf, // I - PDF file
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int number, // I - Page number
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pdfio_obj_t *font) // I - Text font
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{
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pdfio_dict_t *dict; // Page dictionary
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pdfio_stream_t *st; // Page stream
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_pdfio_predictor_t p; // Current predictor
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pdfio_obj_t *noimage, // No predictor
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*pimages[6]; // Images using PNG predictors
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char pname[32], // Image name
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plabel[32]; // Image label
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// Create the images...
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fputs("Create Image (Predictor 1): ", stdout);
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if ((noimage = write_image_object(pdf, _PDFIO_PREDICTOR_NONE)) != NULL)
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puts("PASS");
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else
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return (1);
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for (p = _PDFIO_PREDICTOR_PNG_NONE; p <= _PDFIO_PREDICTOR_PNG_AUTO; p ++)
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{
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printf("Create Image (Predictor %d): ", p);
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if ((pimages[p - _PDFIO_PREDICTOR_PNG_NONE] = write_image_object(pdf, p)) != NULL)
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puts("PASS");
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else
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return (1);
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}
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// Create the page dictionary, object, and stream...
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fputs("pdfioDictCreate: ", stdout);
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if ((dict = pdfioDictCreate(pdf)) != NULL)
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puts("PASS");
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else
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return (1);
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fputs("pdfioPageDictAddImage(1): ", stdout);
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if (pdfioPageDictAddImage(dict, "IM1", noimage))
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puts("PASS");
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else
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return (1);
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for (p = _PDFIO_PREDICTOR_PNG_NONE; p <= _PDFIO_PREDICTOR_PNG_AUTO; p ++)
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{
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printf("pdfioPageDictAddImage(%d): ", p);
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snprintf(pname, sizeof(pname), "IM%d", p);
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if (pdfioPageDictAddImage(dict, pdfioStringCreate(pdf, pname), pimages[p - _PDFIO_PREDICTOR_PNG_NONE]))
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puts("PASS");
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else
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return (1);
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}
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fputs("pdfioPageDictAddFont(F1): ", stdout);
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if (pdfioPageDictAddFont(dict, "F1", font))
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puts("PASS");
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else
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return (1);
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printf("pdfioFileCreatePage(%d): ", number);
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if ((st = pdfioFileCreatePage(pdf, dict)) != NULL)
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puts("PASS");
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else
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return (1);
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// Show content...
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fputs("pdfioContentSetFillColorDeviceGray(0.0): ", stdout);
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if (pdfioContentSetFillColorDeviceGray(st, 0.0))
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puts("PASS");
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else
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return (1);
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fputs("pdfioContentTextBegin(): ", stdout);
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if (pdfioContentTextBegin(st))
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puts("PASS");
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else
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return (1);
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fputs("pdfioContentSetTextFont(\"F1\", 12.0): ", stdout);
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if (pdfioContentSetTextFont(st, "F1", 12.0))
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puts("PASS");
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else
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return (1);
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fputs("pdfioContentTextMoveTo(550.0, 36.0): ", stdout);
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if (pdfioContentTextMoveTo(st, 550.0, 36.0))
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puts("PASS");
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else
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return (1);
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printf("pdfioContentTextShowf(\"%d\"): ", number);
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if (pdfioContentTextShowf(st, "%d", number))
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puts("PASS");
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else
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return (1);
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fputs("pdfioContentTextEnd(): ", stdout);
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if (pdfioContentTextEnd(st))
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puts("PASS");
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else
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return (1);
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// Draw images
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if (draw_image(st, "IM1", 36, 558, 144, 144, "No Predictor"))
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return (1);
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for (p = _PDFIO_PREDICTOR_PNG_NONE; p <= _PDFIO_PREDICTOR_PNG_AUTO; p ++)
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{
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int i = p - _PDFIO_PREDICTOR_PNG_NONE;
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snprintf(pname, sizeof(pname), "IM%d", p);
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snprintf(plabel, sizeof(plabel), "PNG Predictor %d", p);
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draw_image(st, pname, 36 + 180 * (i % 3), 342 - 216 * (i / 3), 144, 144, plabel);
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}
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// Wrap up...
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fputs("pdfioStreamClose: ", stdout);
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if (pdfioStreamClose(st))
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puts("PASS");
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else
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return (1);
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return (0);
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}
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//
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// 'write_page()' - Write a page to a PDF file.
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//
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@ -778,6 +1036,7 @@ write_page(pdfio_file_t *pdf, // I - PDF file
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ty; // Y offset
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// Create the page dictionary, object, and stream...
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fputs("pdfioDictCreate: ", stdout);
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if ((dict = pdfioDictCreate(pdf)) != NULL)
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puts("PASS");
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@ -803,6 +1062,7 @@ write_page(pdfio_file_t *pdf, // I - PDF file
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else
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return (1);
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// Show content...
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fputs("pdfioStreamPuts(...): ", stdout);
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if (pdfioStreamPuts(st,
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"1 0 0 RG 0 g 5 w\n"
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