So I want to use my android phone as an ebook reader and all the PDF viewers for the platform seem to suck badly. So I want to port poppler and write a simple front end for it. I have seen that this has been thought about ("Java/JNI-based frontend for Android" in TODO) however I see no technical discussion. I want to start such a discussion so that I can get some guidance from people who know poppler better. The questions I can think of now are: * Should I just render the PDF down to a bitmap in C and then pass that to Java and draw it to the screen (basically just modify the ImageOutputDev)? Or should I try to use the android native drawing functions to draw the lines and glyphs and stuff? (or even use GLES from C) * Does rendering start from scratch every call to displayPageSlice (or similar) or is some data cached? I'm wondering because I was thinking about only rendering what was needed for the screen at any given time and then rendering new parts as needed for zooming and paning. * What sort of API design should be used? Should it be something as simple as: class PDFRenderer { public PDFRenderer(File file); /// The returned byte[] contains RGB(A?) values for each pixel. public byte[] renderSection(byte[] image, int page, double hDPI, double vDPI, int rotate, int sliceX, int sliceY, int sliceW, int sliceH); public void close(); } * Has anyone started work on this already? * Are you interested in patches adding this feature to the main repository? Thanks a lot. -Arthur