Attachment 28944 Details for Bug 23539 – cairo_bitmap_font_scale.c

cairo_bitmap_font_scale.c

cairo_bitmap_font_scale.c (text/plain), 4.26 KB, created by Ginn Chen on 2009-08-27 02:23:31 UTC

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Creator: Ginn Chen

Created: 2009-08-27 02:23:31 UTC

Size: 4.26 KB

patch

obsolete

>/*
> * Derived from:
> *   ft-text-vertical-layout-type1.c
> *   cairo_snippets_image.c
> *   cairo_snippets_pdf.c
> *   cairo_snippets_ps.c
> * Original Author:
> *   Jinghua Luo
> *   Carl D. Worth
> *   Ãyvind KolÃ¥s
>
> * Usage:
>   gcc `pkg-config --cflags cairo freetype2` `pkg-config --libs cairo freetype2` cairo_bitmap_font_scale.c -o cairo_bitmap_font_scale
> */
>
>#define WIDTH  600
>#define HEIGHT 400
>#define TEXT "Text"
>
>#include <cairo.h>
>#include <cairo-ft.h>
>#include <cairo-pdf.h>
>#include <cairo-ps.h>
>#include <math.h>
>
>static cairo_status_t
>create_scaled_font (cairo_t * cr,
>		    cairo_scaled_font_t **out)
>{
>    FcPattern *pattern, *resolved;
>    FcResult result;
>    cairo_font_face_t *font_face;
>    cairo_scaled_font_t *scaled_font;
>    cairo_font_options_t *font_options;
>    cairo_matrix_t font_matrix, ctm;
>    cairo_status_t status;
>    double pixel_size;
>
>    font_options = cairo_font_options_create ();
>
>    cairo_get_font_options (cr, font_options);
>
>    pattern = FcPatternCreate ();
>    if (pattern == NULL)
>	return CAIRO_STATUS_NO_MEMORY;
>
>    FcPatternAddString (pattern, FC_FAMILY, (FcChar8 *)"Courier");
>    FcPatternAddDouble (pattern, FC_PIXEL_SIZE, 30);
>    FcConfigSubstitute (NULL, pattern, FcMatchPattern);
>
>    cairo_ft_font_options_substitute (font_options, pattern);
>
>    FcDefaultSubstitute (pattern);
>    resolved = FcFontMatch (NULL, pattern, &result);
>    if (resolved == NULL) {
>	FcPatternDestroy (pattern);
>	return CAIRO_STATUS_NO_MEMORY;
>    }
>
>    /* set layout to vertical */
>    FcPatternDel (resolved, FC_VERTICAL_LAYOUT);
>    FcPatternAddBool (resolved, FC_VERTICAL_LAYOUT, FcTrue);
>
>    FcPatternGetDouble (resolved, FC_PIXEL_SIZE, 0, &pixel_size);
>
>    font_face = cairo_ft_font_face_create_for_pattern (resolved);
>
>    cairo_matrix_init_translate (&font_matrix, 10, 30);
>    cairo_matrix_rotate (&font_matrix, M_PI_2/3);
>    cairo_matrix_scale (&font_matrix, pixel_size, pixel_size);
>
>    cairo_get_matrix (cr, &ctm);
>
>    scaled_font = cairo_scaled_font_create (font_face,
>					    &font_matrix,
>					    &ctm,
>					    font_options);
>
>    cairo_font_options_destroy (font_options);
>    cairo_font_face_destroy (font_face);
>    FcPatternDestroy (pattern);
>    FcPatternDestroy (resolved);
>
>    status = cairo_scaled_font_status (scaled_font);
>    if (status) {
>	cairo_scaled_font_destroy (scaled_font);
>	return status;
>    }
>
>    *out = scaled_font;
>    return CAIRO_STATUS_SUCCESS;
>}
>
>void
>show_text (cairo_t *cr, double x, double y, double scale)
>{
>    double line_width;
>    cairo_text_extents_t extents;
>    line_width = cairo_get_line_width (cr);
>
>    cairo_save (cr);
>    cairo_scale(cr, scale, scale);
>    cairo_move_to (cr, x,  y);
>    cairo_show_text (cr, TEXT);
>    cairo_text_extents (cr, TEXT, &extents);
>    cairo_rectangle (cr,
>		     x + extents.x_bearing - line_width / 2,
>		     y + extents.y_bearing - line_width / 2,
>                     extents.width  + line_width,
>                     extents.height + line_width);
>    cairo_stroke (cr);
>    cairo_restore (cr);
>}
>
>void
>draw (cairo_t *cr)
>{
>    cairo_scaled_font_t *scaled_font;
>    cairo_set_source_rgb (cr, 1.0, 1.0, 1.0); /* white */
>    cairo_paint (cr);
>
>    create_scaled_font (cr, &scaled_font);
>    cairo_set_scaled_font (cr, scaled_font);
>
>    cairo_set_source_rgb (cr, 0, 0, 0); /* black */
>
>    show_text(cr, 100.0, 0.0, 1.0);
>    show_text(cr, 100.0, 0.0, 2.0);
>    show_text(cr, 1000.0, 0.0, 0.3);
> 
>    cairo_scaled_font_destroy (scaled_font);
>}
>
>int
>main ()
>{
>    cairo_t *cr;
>    cairo_surface_t *surface;
>
>    surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
>					  WIDTH, HEIGHT);
>    cr = cairo_create (surface);
>    cairo_save (cr);
>    draw (cr);
>    cairo_surface_write_to_png (surface, "mytest.png");
>    cairo_restore (cr);
>    cairo_destroy (cr);
>    cairo_surface_destroy (surface);
>
>    surface = cairo_pdf_surface_create ("mytest.pdf", WIDTH, HEIGHT);
>    cr = cairo_create (surface); 
>    cairo_save (cr);
>    draw (cr);
>    cairo_show_page (cr);
>    cairo_restore (cr);
>    cairo_destroy (cr);
>    cairo_surface_destroy (surface);
>
>    surface = cairo_ps_surface_create ("mytest.ps", WIDTH, HEIGHT);
>    cr = cairo_create (surface); 
>    cairo_save (cr);
>    draw (cr);
>    cairo_show_page (cr);
>    cairo_restore (cr);
>    cairo_destroy (cr);
>    cairo_surface_destroy (surface);
>
>    return 0;
>}
>

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Attachments on bug 23539: 28944 | 28945 | 28946 | 28947

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