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lightning-sunbird  0.9+nobinonly
Defines | Functions | Variables
pixman_rotate.c File Reference
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <cairo.h>
#include <cairo-png.h>
#include <cairo-pdf.h>
#include "cairo_test.h"

Go to the source code of this file.

Defines

#define WIDTH   32
#define HEIGHT   WIDTH
#define IMAGE_WIDTH   (3 * WIDTH)
#define IMAGE_HEIGHT   IMAGE_WIDTH

Functions

static void draw (cairo_t *cr, int width, int height)
int main (void)

Variables

cairo_test_t test

Define Documentation

Definition at line 13 of file pixman_rotate.c.

Definition at line 16 of file pixman_rotate.c.

#define IMAGE_WIDTH   (3 * WIDTH)

Definition at line 15 of file pixman_rotate.c.

#define WIDTH   32

Definition at line 12 of file pixman_rotate.c.


Function Documentation

static void draw ( cairo_t *  cr,
int  width,
int  height 
) [static]

Definition at line 26 of file pixman_rotate.c.

{
    cairo_surface_t *target, *stamp;

    target = cairo_current_target_surface (cr);
    cairo_surface_reference (target);

    stamp = cairo_surface_create_similar (target, CAIRO_FORMAT_ARGB32,
                                     WIDTH, HEIGHT);
    cairo_set_target_surface (cr, stamp);
    cairo_new_path (cr);
    cairo_rectangle (cr, WIDTH / 4, HEIGHT / 4, WIDTH / 2, HEIGHT / 2);
    cairo_set_rgb_color (cr, 1, 0, 0);
    cairo_set_alpha (cr, 0.8);
    cairo_fill (cr);

    cairo_rectangle (cr, 0, 0, WIDTH, HEIGHT);
    cairo_set_line_width (cr, 2);
    cairo_set_rgb_color (cr, 0, 0, 0);
    cairo_set_alpha (cr, 1);
    cairo_stroke (cr);

    cairo_set_target_surface (cr, target);

    /* Draw a translucent rectangle for reference where the rotated
     * image should be. */
    cairo_new_path (cr);
    cairo_rectangle (cr, WIDTH, HEIGHT, WIDTH, HEIGHT);
    cairo_set_rgb_color (cr, 1, 1, 0);
    cairo_set_alpha (cr, 0.3);
    cairo_fill (cr);

#if 1 /* Set to 0 to generate reference image */
    cairo_translate (cr, 2 * WIDTH, 2 * HEIGHT);
    cairo_rotate (cr, M_PI);
#else
    cairo_translate (cr, WIDTH, HEIGHT);
#endif

    cairo_set_alpha (cr, 1);
    cairo_show_surface (cr, stamp, WIDTH + 2, HEIGHT + 2);

    cairo_show_page (cr);

    cairo_surface_destroy (stamp);
    cairo_surface_destroy (target);
}

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int main ( void  )

Definition at line 75 of file pixman_rotate.c.

{
    return cairo_test (&test, draw);
}

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Variable Documentation

Initial value:
 {
    "pixman_rotate",
    "Exposes pixman off-by-one error when rotating",
    IMAGE_WIDTH, IMAGE_HEIGHT
}

Definition at line 18 of file pixman_rotate.c.