/* Shows how to draw with Cairo on SDL surfaces */
static void
draw_screen (SDL_Surface *screen)
{
cairo_t *cr;
cairo_status_t status;
/* Create a cairo drawing context, normalize it and draw a clock. */
SDL_LockSurface (screen); {
cr = cairosdl_create (screen);
cairo_scale (cr, screen->w, screen->h);
draw (cr);
status = cairo_status (cr);
cairosdl_destroy (cr);
}
SDL_UnlockSurface (screen);
SDL_Flip (screen);
/* Nasty nasty error handling. */
if (status != CAIRO_STATUS_SUCCESS) {
fprintf (stderr, "Unable to create or draw with a cairo context "
"for the screen: %s\n",
cairo_status_to_string (status));
exit (1);
}
}
int main(int argc, char *argv[]) {
SDL_Surface *screen;
GError *error = NULL;
RsvgHandle *handle;
struct svgviewer_view vw;
char *filename;
//const char *output_filename = argv[2];
cairo_surface_t *surface;
cairo_t *cr;
cairo_t *cr2;
cairo_status_t status;
int c;
int rerender = 0;
SDL_VideoInfo* info;
vw.zoom = 1;
/* Process options */
while (1) {
int option_index = 0;
c = getopt_long (argc, argv, "d:v:",
long_options, &option_index);
/* Detect the end of the options. */
if (c == -1) break;
switch (c) {
case 0:
break;
case 'z':
errno = 0;
vw.zoom = strtod(optarg, NULL);
DEBUG("Zoom set to %g\n", vw.zoom);
if (errno) FAIL("Usage: -z or --zoom requires a floating point argument");
break;
default:
abort();
};
}
if (argc != optind+1) FAIL("Usage: %s OPTIONS input_file.svg\n", argv[0]);
filename = argv[optind];
g_type_init();
rsvg_set_default_dpi(72.0);
handle = rsvg_handle_new_from_file(filename, &error);
if (error != NULL)
FAIL(error->message);
rsvg_handle_get_dimensions(handle, &dim);
vw.x = 0; vw.y = 0;
vw.zoom = 1;
/* Initialize SDL */
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER) < 0) {
fprintf(stderr, "Unable to initialize SDL: %s\n",
SDL_GetError());
exit(1);
}
int videomodeflags;
if (fullscreen_flag) {
screen = SDL_SetVideoMode(0, 0, 32,
videomodeflags =
SDL_FULLSCREEN | SDL_SWSURFACE | SDL_RESIZABLE);
} else {
const SDL_VideoInfo* info = SDL_GetVideoInfo();
if ((dim.width >= info->current_w) ||
(dim.height >= info->current_h)) {
screen = SDL_SetVideoMode(0, 0, 32,
videomodeflags =
SDL_SWSURFACE | SDL_RESIZABLE);
} else {
screen = SDL_SetVideoMode(dim.width, dim.height, 32,
videomodeflags =
SDL_SWSURFACE | SDL_RESIZABLE);
}
}
if (screen == NULL) {
fprintf(stderr, "Unable to set video mode: %s\n", SDL_GetError());
exit(1);
}
vw.pixel_width = screen->w;
vw.pixel_height = screen->h;
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, vw.pixel_width, vw.pixel_height);
cr2 = cairo_create (surface);
//cairo_translate(cr2, ((double)dim.width)/-2, ((double)dim.height)/-2);
//surface = cairo_pdf_surface_create (output_filename, width, height);
// SDL_LockSurface(screen);
//cairo_scale (cr, screen->w, screen->h);
cairo_save(cr2);
view_transform(cr2, &vw);
rsvg_handle_render_cairo(handle, cr2);
status = cairo_status(cr2);
if (status) FAIL(cairo_status_to_string(status));
cairo_restore(cr2);
cr = cairosdl_create(screen);
// cairo_set_source_rgb(cr, 1, 1, 1);
// cairo_paint(cr);
cairo_save(cr);
//cairo_scale(cr, .5, .5);
//cairo_translate(cr, width/2, height/2 );
//cairo_rotate( cr, 3.14/2 );
//cairo_translate(cr, -width/2, -height/2 );
cairo_set_source_surface (cr, surface, 0, 0);
cairo_paint(cr);
cairo_restore(cr);
status = cairo_status(cr);
if (status)
FAIL(cairo_status_to_string(status));
// SDL_UnlockSurface(screen);
SDL_UpdateRect(screen, 0, 0, 0, 0);
{
SDL_Event event;
while (SDL_WaitEvent(&event)) {
switch (event.type) {
case SDL_KEYDOWN:
switch (event.key.keysym.sym) {
case SDLK_UP:
vw.y -= 0.1 / vw.zoom;
rerender = 1;
break;
case SDLK_DOWN:
vw.y += 0.1 / vw.zoom;
rerender = 1;
break;
case SDLK_LEFT:
vw.x -= 0.1 / vw.zoom;
rerender = 1;
break;
case SDLK_RIGHT:
vw.x += 0.1 / vw.zoom;
rerender = 1;
break;
case SDLK_a:
vw.zoom *= 1.025;
rerender = 1;
break;
case SDLK_z:
vw.zoom /= 1.025;
rerender = 1;
break;
case SDLK_ESCAPE:
goto exit;
default:
break;
}
break;
case SDL_VIDEORESIZE:
{
vw.pixel_width = event.resize.w;
vw.pixel_height = event.resize.h;
cairo_destroy(cr2);
cairo_surface_destroy(surface);
surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, vw.pixel_width, vw.pixel_height);
cr2 = cairo_create(surface);
//cairo_translate(cr2, ((double)dim.width)/-2, ((double)dim.height)/-2);
cairo_save(cr2);
view_transform(cr2, &vw);
rsvg_handle_render_cairo(handle, cr2);
cairo_restore(cr2);
screen = SDL_SetVideoMode(event.resize.w, event.resize.h, 32, videomodeflags);
cairosdl_destroy(cr);
cr = cairosdl_create(screen);
cairo_save(cr);
cairo_set_source_surface(cr, surface, 0, 0);
cairo_paint(cr);
cairo_restore(cr);
};
break;
case SDL_QUIT:
goto exit;
default:
break;
}
if (rerender) {
cairo_save(cr2);
view_transform(cr2, &vw);
rsvg_handle_render_cairo(handle, cr2);
status = cairo_status(cr2);
if (status) FAIL(cairo_status_to_string(status));
cairo_restore(cr2);
cairo_set_source_surface(cr, surface, 0, 0);
cairo_paint(cr);
rerender = 0;
}
SDL_UpdateRect(screen, 0, 0, 0, 0);
};
};
exit:
cairosdl_destroy(cr);
if (status)
FAIL(cairo_status_to_string(status));
cairo_destroy (cr2);
cairo_surface_destroy(surface);
SDL_Quit();
exit(EXIT_SUCCESS);
}
