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GUAC-718: Scale text layout to fit within ideal size.

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This commit is contained in:
Michael Jumper 2014-06-02 15:34:48 -07:00
parent 122a8095e4
commit b106e13bb1
3 changed files with 39 additions and 4 deletions
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8
configure.ac
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@ -42,6 +42,13 @@ AC_CHECK_HEADERS([fcntl.h stdlib.h string.h sys/socket.h time.h sys/time.h syslo
# Source characteristics
AC_DEFINE([_XOPEN_SOURCE], [700], [Uses X/Open and POSIX APIs])
# Check for whether math library is required
AC_CHECK_LIB([m], [cos],
[MATH_LIBS=-lm],
[AC_CHECK_DECL([cos],,
AC_MSG_ERROR("Complex math functions are missing and no libm was found")
[#include <math.h>])])
# libpng
AC_CHECK_LIB([png], [png_write_png], [PNG_LIBS=-lpng],
AC_MSG_ERROR("libpng is required for writing png messages"))
@ -62,6 +69,7 @@ AC_CHECK_LIB([cunit], [CU_run_test], [CUNIT_LIBS=-lcunit])
AC_CHECK_LIB([wsock32], [main])
AC_SUBST(LIBADD_DLOPEN)
AC_SUBST(MATH_LIBS)
AC_SUBST(PNG_LIBS)
AC_SUBST(CAIRO_LIBS)
AC_SUBST(PTHREAD_LIBS)

2
src/terminal/Makefile.am
View File

@ -50,5 +50,5 @@ libguac_terminal_la_SOURCES = \
terminal_handlers.c
libguac_terminal_la_LIBADD = @LIBGUAC_LTLIB@ @COMMON_LTLIB@
libguac_terminal_la_LDFLAGS = @PTHREAD_LIBS@ @PANGO_LIBS@ @PANGOCAIRO_LIBS@ @CAIRO_LIBS@
libguac_terminal_la_LDFLAGS = @PTHREAD_LIBS@ @PANGO_LIBS@ @PANGOCAIRO_LIBS@ @CAIRO_LIBS@ @MATH_LIBS@

33
src/terminal/display.c
View File

@ -26,6 +26,7 @@
#include "display.h"
#include "types.h"
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
@ -143,8 +144,11 @@ guac_terminal_glyph* __guac_terminal_get_glyph(guac_terminal_display* display, i
cairo_surface_t* surface;
cairo_t* cairo;
int surface_width, surface_height;
PangoLayout* layout;
int layout_width, layout_height;
int ideal_layout_width, ideal_layout_height;
/* Get codepoint hash */
int hashcode = __guac_terminal_hash_codepoint(codepoint);
@ -175,16 +179,39 @@ guac_terminal_glyph* __guac_terminal_get_glyph(guac_terminal_display* display, i
if (width < 0)
width = 1;
surface_width = width * display->char_width;
surface_height = display->char_height;
ideal_layout_width = surface_width * PANGO_SCALE;
ideal_layout_height = surface_height * PANGO_SCALE;
/* Prepare surface */
surface = cairo_image_surface_create(
CAIRO_FORMAT_ARGB32,
cell_width, display->char_height);
surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
surface_width, surface_height);
cairo = cairo_create(surface);
/* Get layout */
layout = pango_cairo_create_layout(cairo);
pango_layout_set_font_description(layout, display->font_desc);
pango_layout_set_text(layout, utf8, bytes);
pango_layout_set_alignment(layout, PANGO_ALIGN_CENTER);
pango_layout_get_size(layout, &layout_width, &layout_height);
/* If layout bigger than available space, scale it back */
if (layout_width > ideal_layout_width || layout_height > ideal_layout_height) {
double scale = fmin(ideal_layout_width / (double) layout_width,
ideal_layout_height / (double) layout_height);
cairo_scale(cairo, scale, scale);
/* Update layout to reflect scaled surface */
pango_layout_set_width(layout, ideal_layout_width / scale);
pango_layout_set_height(layout, ideal_layout_height / scale);
pango_cairo_update_layout(cairo, layout);
}
/* Draw */
cairo_set_source_rgba(cairo,