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2017-10-24Make a public fz_new_icc_colorspace_from_file function.Tor Andersson
2017-10-24Fix fz_paint_pixmap alpha blending.Robin Watts
We were failing to allow for the fact that the source pixmap is premultiplied, meaning we were squaring the alpha each time.
2017-10-24Move to be more like Ghostscript in the handling of shapes.Robin Watts
When pushing a transparency group, MuPDF used to always create a shape plane if there was one before. Ghostscript works differently, and only creates a shape plane if we are in a non-isolated group. This means that when blending an isolated group back to a non isolated group, GS uses the "source alpha" in place of the "shape alpha" to modify the non-isolated groups shape plane. We update MuPDF to do the same here - it requires some new (small) routines to do this new type of shape update, but means we carry smaller amounts of data around overall. Also, for what little remains of my sanities sake, this helps by making it easier to compare the debug output from the 2 different renderers.
2017-10-24Clear isolated flag within 'inner' knockout groups.Robin Watts
Knockout groups are only created temporarily, and this solves problems in Altona_Technical_v20_x4.pdf on page 7 on the 'B'. It seems reasonable that we shouldn't need to have isolated enabled here, because it's really required for blending the whole isolated group back. While we don't propagate "isolated" into "inner" knockout groups, we DO need to use the incoming isolated value to correctly establish the backdrop to use.
2017-10-24Update blend mode debug dumps to include group backdrops.Robin Watts
2017-10-24Make sure shades use proper "default" color space.Michael Vrhel
Fixes some issues in Altona test file.
2017-10-24Avoid using overprinting routines unnecessarily.Robin Watts
2017-10-24Only allow overprint when color spaces are subtractive.Michael Vrhel
Fixes on issue on page 14 of altona test.
2017-10-24Fix separation finding code.Robin Watts
2017-10-24Look for changes to Default colorspaces in XObjects.Robin Watts
2017-10-24Fix overprint color component detection.Robin Watts
If a colorant is not an explicit separation, then it will be mapped down to process colorants. These cannot be protected from overprint. Incorporates a fix for a problem with shades seen on page 8 of. Altona_Technical_v20_x4. This shows a problem where we were failing to correctly overprint a grey gradient with a spot color one. The overprint setup code was checking for 'Orange' being one of the process colours, and not finding it. Consequently it was deciding that Orange would have to be mapped to a process color, and so the process colors could not be protected from overprint. The code should have spotted that 'Orange' was one of the spot colors. With this added, it works correctly.
2017-10-24Don't apply default decode array to ICC Lab image data.Robin Watts
Adjust the decode array to allow for the fact that the default decode is done by the ICC code.
2017-10-24Only do proof conversion in final pop.Michael Vrhel
The proof conversion should only be done after we have done all our drawing in the separations group. Fixes issue in page 7 of Altona test.
2017-10-24Fix overprint with shadings.Robin Watts
2017-10-24Add FZ_ENABLE_SPOT_RENDERING define.Robin Watts
2017-10-24Implement DeviceGray to KMichael Vrhel
When source color is DeviceGray, and the destination color CMYK we should map the gray values to K. See note in Section 6.3 of PDF spec.
2017-10-24Overprint support.Robin Watts
Introduce an fz_overprint bitmap (currently just a uint32_t, but it'll grow to be an array of them if FZ_MAX_COLOR is increased). Pointers to this are passed into all our painting routines. NULL means "Do what you've always done before, with no overprint". non NULL, means that every set bit means "don't ever alter this component". We therefore set the overprint bitmap up according to the input color/colorspace/colorparams before calling each routine.
2017-10-24Change colorspace 'device_n' field to be a flags word.Robin Watts
2017-10-24Logic for Sep and DeviceN colorspaces with C,M,Y, or K.Michael Vrhel
Special care is required when the DeviceN color space has cyan, magenta, yellow or black. For example, even if we support separations in the destination, if the color space has CMY or K as one of its colorants and we are drawing to an RGB or Gray pixmap we will want to do the tint transform. Also if the pixmap has no seps memember present, we support the separations if the destination is CMYK and the DeviceN colorspace has no "Spot" (non-CMYK) colorants.
2017-10-16Print warning when PDF version number is not a known version.Tor Andersson
2017-10-16Check for integer overflow when validating new style xref Index.Tor Andersson
2017-10-16Add missing pdfsign.c file to MSVC project.Robin Watts
2017-10-13Add fz_deflate family of functions.Robin Watts
This gives us a friendlier interface to zlib. Simplifies PNG output and PCLM output code.
2017-10-13Rename internals of flate filter.Robin Watts
This is to avoid conflict with the next commit.
2017-10-13Simple PCLm device.Robin Watts
Both bandwriter and document_writer interfaces cope with multi page docs. Update mudraw to output pclm format too. Incorporates fixes from Tor.
2017-10-13Fix further problem seen in PDF_2.0_FTS/fts_23_2311.pdfRobin Watts
This file has a type 3 font in it. It first uses a 'd1' glyph, that uses a pattern. Accordingly, we we render that pattern to a mask tile and store that tile. Then it uses a 'd0' glyph, which uses the same pattern. The cache is checked, and we erroneously pick up the cached tile to reuse it - but this is not a colored rendering, so we assert on plotting. The fix is to ensure that the required colorspaces match. This requires us to add the colorspace to the tile key. Unfortunately, this means that colorspaces have to become key_storable, so the patch is slightly larger than would otherwise be the case.
2017-10-13Fix assert in fts_23_2311.pdfRobin Watts
Ensure that if we ask for a color converter for a NULL colorspace, that we treat it as devicegray. This copes with the mask cases.
2017-10-12Don't cache page count in pdf_document.Tor Andersson
Make sure any changes to the page tree are always reflected immediately. The rev_page_map lookup cache exists when we load the outlines in order to resolve links faster, so we don't need to worry about that one. The linear_page_refs stuff is more troublesome, so don't mix editing a PDF with progressive loading!
2017-10-12Fix reference counting error in pdf_add_page.Tor Andersson
2017-10-12mutool run: Take reference to global colorspaces.Tor Andersson
Avoid double freeing the device colorspaces.
2017-10-12Refactor image format magic signature recognition into its own function.Tor Andersson
2017-10-12Change default scalable SVG resolution.Tor Andersson
HTML doesn't respect the DPI setting, so SVG images end up too big.
2017-10-12Purge out of date separation bindings.Tor Andersson
2017-10-12Add 'mutool sign' tool for verifying digital PDF signatures.Tor Andersson
2017-10-12Fix pdf_widget/pdf_annot typedefs. They are the same struct.Tor Andersson
2017-10-12Fix bug in murun when creating buffers from strings.Tor Andersson
The code only worked for string literals, not garbage collected or short strings.
2017-10-12Some more consts.Tor Andersson
2017-10-12Make fz_open_memory take a const buffer.Tor Andersson
2017-10-12Make image loading use const data pointers.Tor Andersson
2017-10-05Fix out of bounds check in pnm parser.Sebastian Rasmussen
2017-10-05Remove unused code.Sebastian Rasmussen
2017-10-05Remove shadowed variables.Sebastian Rasmussen
2017-10-05Avoid double literals and double math functions.Sebastian Rasmussen
2017-10-04Mark another variable fz_var(), avoiding optimization.Sebastian Rasmussen
This really should have been part of commit 0ef7cb983c4325156e08525381542ae3ada04720.
2017-10-02Drop stream upon error in inline stream.Sebastian Rasmussen
2017-10-02Make sure to drop chain upon error in raw and crypto filters.Sebastian Rasmussen
2017-09-27Bug 698593: Fix assert in image painting.Robin Watts
2017-09-27Bug 698588: Short circuit plotting of images if alpha == 0.Robin Watts
2017-09-25Bug 698592: Mark variable fz_var(), avoiding optimization.Sebastian Rasmussen
The change in 2707fa9e8e6d17d794330e719dec1b08161fb045 in build_filter_chain() allows for the variable chain to reside in a register, which means that the bug is likely to only be visible if built under optimization. First the chain variable is transferred to chain2, then set to NULL, then when an exception occurs in build_filter() the filter chain will be freed by build_filter(). Next the expectation is that execution proceeds to fz_catch() where fz_drop_stream() would be called with chain == NULL. However due to the chain variable residing in a register, its value is not NULL as expected, but was reset to its original value upon the exception (since they use setjmp()), hence fz_drop_stream() is called with a non-NULL value. Marking the chain variable with fz_var() prevents the compiler from allowing the chain variable to reside in a register and hence its value will remain NULL and never be reset.
2017-09-25Introduce sanitize-relase build target.Sebastian Rasmussen
Sometimes ASAN issues only occur if optimization is enabled. This build target allows for testing under these conditions.
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