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Interactive browsing through a PDF 

This patch introduces the basic key handling required to browse through
a multi-page PDF document ([page-up] or [enter] -> next page,
[page-down] or [backspace] -> previous page).
This commit is contained in:
Norman Feske 2012-01-17 23:02:36 +01:00
parent ea8b113303
commit 3c09a06620
1 changed files with 76 additions and 15 deletions
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91
libports/src/app/mupdf/main.cc
View File

@ -14,6 +14,10 @@
/* Genode includes */
#include <framebuffer_session/connection.h>
#include <base/sleep.h>
#include <input_session/connection.h>
#include <input/event.h>
#include <input/keycodes.h>
#include <timer_session/connection.h>
/* MuPDF includes */
extern "C" {
@ -116,17 +120,18 @@ class Pdf_view
struct _Framebuffer : Framebuffer::Connection
{
typedef uint16_t pixel_t;
int width, height;
Framebuffer::Session::Mode mode;
pixel_t *base;
Framebuffer::Mode mode;
pixel_t *base;
_Framebuffer()
:
mode(Framebuffer::Connection::mode()),
base(Genode::env()->rm_session()->attach(dataspace()))
{
info(&width, &height, &mode);
base = Genode::env()->rm_session()->attach(dataspace());
PDBG("Framebuffer is %dx%d\n", width, height);
PDBG("Framebuffer is %dx%d\n", mode.width(), mode.height());
if (mode != Framebuffer::Session::RGB565) {
if (mode.format() != Framebuffer::Mode::RGB565) {
PERR("Color modes other than RGB565 are not supported. Exiting.");
throw Non_supported_framebuffer_mode();
}
@ -148,10 +153,10 @@ class Pdf_view
{
pdfapp_init(&_pdfapp);
_pdfapp.userdata = this;
_pdfapp.scrw = _framebuffer.width;
_pdfapp.scrh = _framebuffer.height;
_pdfapp.resolution = 2*75; /* XXX read from config */
_pdfapp.pageno = 9; /* XXX read from config */
_pdfapp.scrw = _framebuffer.mode.width();
_pdfapp.scrh = _framebuffer.mode.height();
_pdfapp.resolution = 75; /* XXX read from config */
_pdfapp.pageno = 0; /* XXX read from config */
int fd = open(file_name, O_BINARY | O_RDONLY, 0666);
if (fd < 0) {
@ -168,18 +173,23 @@ class Pdf_view
}
void show();
void handle_key(int ascii)
{
pdfapp_onkey(&_pdfapp, ascii);
}
};
void Pdf_view::show()
{
int const x_max = Genode::min(_framebuffer.width, _pdfapp.image->w);
int const y_max = Genode::min(_framebuffer.height, _pdfapp.image->h);
int const x_max = Genode::min(_framebuffer.mode.width(), _pdfapp.image->w);
int const y_max = Genode::min(_framebuffer.mode.height(), _pdfapp.image->h);
Genode::size_t src_line_bytes = _pdfapp.image->n * _pdfapp.image->w;
unsigned char *src_line = _pdfapp.image->samples;
Genode::size_t dst_line_width = _framebuffer.width; /* in pixels */
Genode::size_t dst_line_width = _framebuffer.mode.width(); /* in pixels */
_Framebuffer::pixel_t *dst_line = _framebuffer.base;
for (int y = 0; y < y_max; y++) {
@ -188,7 +198,13 @@ void Pdf_view::show()
dst_line += dst_line_width;
}
_framebuffer.refresh(0, 0, _framebuffer.width, _framebuffer.height);
_framebuffer.refresh(0, 0, _framebuffer.mode.width(), _framebuffer.mode.height());
}
extern "C" void _sigprocmask()
{
/* suppress debug message by default "not-implemented" implementation */
}
@ -270,12 +286,57 @@ void winresize(pdfapp_t *app, int w, int h)
** Main program **
******************/
static int keycode_to_ascii(int code)
{
switch (code) {
case Input::KEY_LEFT: return 'h';
case Input::KEY_RIGHT: return 'l';
case Input::KEY_DOWN: return 'j';
case Input::KEY_UP: return 'k';
case Input::KEY_PAGEDOWN:
case Input::KEY_ENTER: return ' ';
case Input::KEY_PAGEUP:
case Input::KEY_BACKSPACE: return 'b';
default: return 0;
}
}
int main(int, char **)
{
char const *file_name = "test.pdf"; /* XXX read from config */
static Pdf_view pdf_view(file_name);
static Input::Connection input;
static Timer::Connection timer;
Input::Event *ev_buf = Genode::env()->rm_session()->attach(input.dataspace());
int key_cnt = 0;
/*
* Input event loop
*/
for (;;) {
while (!input.is_pending()) timer.msleep(20);
for (int i = 0, num_ev = input.flush(); i < num_ev; i++) {
Input::Event const &ev = ev_buf[i];
if (ev.type() == Input::Event::PRESS) key_cnt++;
if (ev.type() == Input::Event::RELEASE) key_cnt--;
if (ev.type() == Input::Event::PRESS && key_cnt == 1) {
PDBG("key %d pressed", ev.keycode());
int const ascii = keycode_to_ascii(ev.keycode());
if (ascii)
pdf_view.handle_key(ascii);
}
}
}
Genode::sleep_forever();
return 0;
}