336 lines
7.9 KiB
C++
336 lines
7.9 KiB
C++
/*
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* \brief MuPDF for Genode
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* \author Norman Feske
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* \date 2012-01-09
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*/
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/*
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* Copyright (C) 2012-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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/* Genode includes */
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#include <base/env.h>
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#include <libc/component.h>
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#include <framebuffer_session/connection.h>
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#include <base/sleep.h>
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#include <input_session/connection.h>
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#include <input/event.h>
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#include <input/keycodes.h>
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#include <timer_session/connection.h>
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/* MuPDF includes */
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extern "C" {
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#include <fitz.h>
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#include <mupdf.h>
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#include <muxps.h>
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#include <pdfapp.h>
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}
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/* libc includes */
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#include <unistd.h>
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/***************
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** Dithering **
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***************/
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/*
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* XXX blatantly copied from 'demo/src/app/backdrop/main.cc'
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*
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* We should factor-out the dithering support into a separate header file.
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* But where is a good place to put it?
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*/
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enum { DITHER_SIZE = 16, DITHER_MASK = DITHER_SIZE - 1 };
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static const int dither_matrix[DITHER_SIZE][DITHER_SIZE] = {
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{ 0,192, 48,240, 12,204, 60,252, 3,195, 51,243, 15,207, 63,255 },
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{ 128, 64,176,112,140, 76,188,124,131, 67,179,115,143, 79,191,127 },
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{ 32,224, 16,208, 44,236, 28,220, 35,227, 19,211, 47,239, 31,223 },
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{ 160, 96,144, 80,172,108,156, 92,163, 99,147, 83,175,111,159, 95 },
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{ 8,200, 56,248, 4,196, 52,244, 11,203, 59,251, 7,199, 55,247 },
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{ 136, 72,184,120,132, 68,180,116,139, 75,187,123,135, 71,183,119 },
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{ 40,232, 24,216, 36,228, 20,212, 43,235, 27,219, 39,231, 23,215 },
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{ 168,104,152, 88,164,100,148, 84,171,107,155, 91,167,103,151, 87 },
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{ 2,194, 50,242, 14,206, 62,254, 1,193, 49,241, 13,205, 61,253 },
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{ 130, 66,178,114,142, 78,190,126,129, 65,177,113,141, 77,189,125 },
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{ 34,226, 18,210, 46,238, 30,222, 33,225, 17,209, 45,237, 29,221 },
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{ 162, 98,146, 82,174,110,158, 94,161, 97,145, 81,173,109,157, 93 },
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{ 10,202, 58,250, 6,198, 54,246, 9,201, 57,249, 5,197, 53,245 },
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{ 138, 74,186,122,134, 70,182,118,137, 73,185,121,133, 69,181,117 },
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{ 42,234, 26,218, 38,230, 22,214, 41,233, 25,217, 37,229, 21,213 },
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{ 170,106,154, 90,166,102,150, 86,169,105,153, 89,165,101,149, 85 }
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};
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static inline uint16_t rgb565(int r, int g, int b)
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{
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enum {
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R_MASK = 0xf800, R_LSHIFT = 8,
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G_MASK = 0x07e0, G_LSHIFT = 3,
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B_MASK = 0x001f, B_RSHIFT = 3
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};
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return ((r << R_LSHIFT) & R_MASK)
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| ((g << G_LSHIFT) & G_MASK)
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| ((b >> B_RSHIFT) & B_MASK);
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}
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static void convert_line_rgba_to_rgb565(const unsigned char *rgba_src,
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uint16_t *dst, int num_pixels, int line)
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{
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using namespace Genode;
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enum { CHANNEL_MAX = 255 };
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int const *dm = dither_matrix[line & DITHER_MASK];
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for (int i = 0; i < num_pixels; i++) {
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int v = dm[i & DITHER_MASK] >> 5;
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*dst++ = rgb565(min(v + (int)rgba_src[0], (int)CHANNEL_MAX),
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min(v + (int)rgba_src[1], (int)CHANNEL_MAX),
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min(v + (int)rgba_src[2], (int)CHANNEL_MAX));
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/* we ignore the alpha channel */
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rgba_src += 4; /* next pixel */
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}
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}
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/**************
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** PDF view **
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**************/
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class Pdf_view
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{
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public:
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/**
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* Exception types
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*/
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class Non_supported_framebuffer_mode { };
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class Invalid_input_file_name { };
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class Unexpected_document_color_depth { };
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private:
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Framebuffer::Mode _framebuffer_mode;
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struct _Framebuffer : Framebuffer::Connection
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{
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typedef uint16_t pixel_t;
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Framebuffer::Mode mode;
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pixel_t *base;
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_Framebuffer(Genode::Env &env, Framebuffer::Mode &mode)
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:
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Framebuffer::Connection(env, mode),
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mode(Framebuffer::Connection::mode()),
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base(env.rm().attach(dataspace()))
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{
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if (mode.format() != Framebuffer::Mode::RGB565) {
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Genode::error("Color modes other than RGB565 are not supported. Exiting.");
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throw Non_supported_framebuffer_mode();
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}
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}
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} _framebuffer;
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pdfapp_t _pdfapp;
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public:
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/**
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* Constructor
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*
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* \throw Non_supported_framebuffer_mode
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* \throw Invalid_input_file_name
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* \throw Unexpected_document_color_depth
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*/
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Pdf_view(Genode::Env &env, char const *file_name)
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:
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_framebuffer_mode(0, 0, Framebuffer::Mode::RGB565),
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_framebuffer(env, _framebuffer_mode)
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{
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pdfapp_init(&_pdfapp);
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_pdfapp.userdata = this;
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_pdfapp.scrw = _framebuffer.mode.width();
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_pdfapp.scrh = _framebuffer.mode.height();
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_pdfapp.resolution = 75; /* XXX read from config */
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_pdfapp.pageno = 0; /* XXX read from config */
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int fd = open(file_name, O_BINARY | O_RDONLY, 0666);
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if (fd < 0) {
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Genode::error("Could not open input file \"", file_name, "\", Exiting.");
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throw Invalid_input_file_name();
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}
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pdfapp_open(&_pdfapp, (char *)file_name, fd, 0);
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if (_pdfapp.image->n != 4) {
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Genode::error("Unexpected color depth, expected 4, got ",
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_pdfapp.image->n, ", Exiting.");
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throw Unexpected_document_color_depth();
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}
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}
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void show();
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void handle_key(int ascii)
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{
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Libc::with_libc([&] () { pdfapp_onkey(&_pdfapp, ascii); });
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}
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};
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void Pdf_view::show()
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{
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int const x_max = Genode::min(_framebuffer.mode.width(), _pdfapp.image->w);
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int const y_max = Genode::min(_framebuffer.mode.height(), _pdfapp.image->h);
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Genode::size_t src_line_bytes = _pdfapp.image->n * _pdfapp.image->w;
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unsigned char *src_line = _pdfapp.image->samples;
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Genode::size_t dst_line_width = _framebuffer.mode.width(); /* in pixels */
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_Framebuffer::pixel_t *dst_line = _framebuffer.base;
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for (int y = 0; y < y_max; y++) {
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convert_line_rgba_to_rgb565(src_line, dst_line, x_max, y);
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src_line += src_line_bytes;
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dst_line += dst_line_width;
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}
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_framebuffer.refresh(0, 0, _framebuffer.mode.width(), _framebuffer.mode.height());
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}
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extern "C" void _sigprocmask()
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{
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/* suppress debug message by default "not-implemented" implementation */
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}
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/**************************
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** Called from pdfapp.c **
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**************************/
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void winrepaint(pdfapp_t *pdfapp)
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{
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Pdf_view *pdf_view = (Pdf_view *)pdfapp->userdata;
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pdf_view->show();
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}
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void winrepaintsearch(pdfapp_t *)
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{
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Genode::warning(__func__, " not implemented");
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}
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void wincursor(pdfapp_t *, int curs)
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{
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Genode::warning(__func__, " curs=%d - not implemented", curs);
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}
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void winerror(pdfapp_t *, fz_error error)
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{
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Genode::error("winerror: error=", error);
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Genode::sleep_forever();
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}
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void winwarn(pdfapp_t *, char *msg)
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{
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Genode::warning("MuPDF: ", Genode::Cstring(msg));
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}
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void winhelp(pdfapp_t *) { }
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char *winpassword(pdfapp_t *, char *)
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{
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Genode::warning(__func__, " not implemented");
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return NULL;
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}
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void winclose(pdfapp_t *app)
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{
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Genode::warning(__func__, " not implemented");
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}
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void winreloadfile(pdfapp_t *)
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{
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Genode::warning(__func__, " not implemented");
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}
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void wintitle(pdfapp_t *app, char *s) { }
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void winresize(pdfapp_t *app, int w, int h) { }
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/******************
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** Main program **
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******************/
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static int keycode_to_ascii(int code)
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{
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switch (code) {
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case Input::KEY_LEFT: return 'h';
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case Input::KEY_RIGHT: return 'l';
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case Input::KEY_DOWN: return 'j';
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case Input::KEY_UP: return 'k';
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case Input::KEY_PAGEDOWN:
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case Input::KEY_ENTER: return ' ';
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case Input::KEY_PAGEUP:
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case Input::KEY_BACKSPACE: return 'b';
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default: return 0;
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}
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}
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struct Main
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{
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Genode::Env &_env;
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char const *_file_name { "test.pdf" }; /* XXX read from config */
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Pdf_view _pdf_view { _env, _file_name };
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Input::Connection _input { _env };
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void _handle_input()
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{
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_input.for_each_event([&] (Input::Event const &ev) {
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if (ev.type() == Input::Event::PRESS) {
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int const ascii = keycode_to_ascii(ev.code());
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if (ascii) { _pdf_view.handle_key(ascii); }
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}
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});
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}
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Genode::Signal_handler<Main> _input_dispatcher {
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_env.ep(), *this, &Main::_handle_input };
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Main(Genode::Env &env) : _env(env)
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{
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_input.sigh(_input_dispatcher);
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}
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};
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void Libc::Component::construct(Libc::Env &env)
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{
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Libc::with_libc([&] () { static Main main(env); });
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}
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