Estou seguindo o este tutorial para escrever aplicativos pango. Quando tento compilá-lo, o compilador não consegue encontrar os cabeçalhos pangocairo.h. Aqui está o meu arquivo de origem:
#include <stdio.h>
#include <math.h>
#include <pango/pangocairo.h>
void rendertext(cairo_t *cr);
int main(int argc, char* argv[]) {
cairo_t *cr; // cairo instance
cairo_status_t status; // variable to hold the various states of the cairo lib
cairo_surface_t *surface; // the cairo surface to render to
surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 300, 100); // cairo_image_surface_create(pixelformat, width, height);
cr = cairo_create(surface); // tell the cairo instance 'cr' to output to 'surface'
cairo_set_source_rgb(cr, 1.0, 1.0, 1.0); // sets the drawing colour to white
cairo_paint(cr); // fill the surface with the active colour (if you don't do this, you will
// be given a surface with a transparent background to draw on)
rendertext(cr); // do pango stuff here
cairo_destroy(cr); // free the cairo instance
status = cairo_surface_write_to_png(surface, "out.png"); // output the contents of 'surface' to the file "out.png"
cairo_surface_destroy(surface); // free the surface
if (status != CAIRO_STATUS_SUCCESS) {
// if 'status' was not set to indicate a successful operation when saving as a png, error
printf("Could not save to png, \"out.png\"\n");
return 1;
}
return 0;
}
void rendertext(cairo_t *cr) {
PangoLayout *layout; // layout for a paragraph of text
PangoFontDescription *desc; // this structure stores a description of the style of font you'd most like
cairo_translate(cr, 10, 20); // set the origin of cairo instance 'cr' to (10,20) (i.e. this is where
// drawing will start from).
layout = pango_cairo_create_layout(cr); // init pango layout ready for use
pango_layout_set_text(layout, "Hello World!", -1); // sets the text to be associated with the layout (final arg is length, -1
// to calculate automatically when passing a nul-terminated string)
desc = pango_font_description_from_string("Sans Bold 12"); // specify the font that would be ideal for your particular use
pango_layout_set_font_description(layout, desc); // assign the previous font description to the layout
pango_font_description_free(desc); // free the description
cairo_set_source_rgb(cr, 0.0, 0.0, 1.0); // set the colour to blue
pango_cairo_update_layout(cr, layout); // if the target surface or transformation properties of the cairo instance
// have changed, update the pango layout to reflect this
pango_cairo_show_layout(cr, layout); // draw the pango layout onto the cairo surface
g_object_unref(layout); // free the layout
}
Este é o erro de compilação:
cc pangc.c -o pangc
pangc.c:3:25: fatal error: pango/pango.h: No such file or directory
#include <pango/pango.h>
^
compilation terminated.
make: *** [pangc] Error 1
Eu já instalei o pacote cairo libcairo2-dev e a biblioteca pango libpango1.0-dev. Qualquer ajuda seria apreciada!