test/create-for-stream.c

   1 /*
   2  * Copyright © 2006 Red Hat, Inc.
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software
   5  * and its documentation for any purpose is hereby granted without
   6  * fee, provided that the above copyright notice appear in all copies
   7  * and that both that copyright notice and this permission notice
   8  * appear in supporting documentation, and that the name of
   9  * Red Hat, Inc. not be used in advertising or publicity pertaining to
  10  * distribution of the software without specific, written prior
  11  * permission. Red Hat, Inc. makes no representations about the
  12  * suitability of this software for any purpose.  It is provided "as
  13  * is" without express or implied warranty.
  14  *
  15  * RED HAT, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
  16  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  17  * FITNESS, IN NO EVENT SHALL RED HAT, INC. BE LIABLE FOR ANY SPECIAL,
  18  * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  19  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  20  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
  21  * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  22  *
  23  * Author: Kristian Høgsberg <krh@redhat.com>
  24  */
  25
  26 #include <stdio.h>
  27 #include <string.h>
  28 #include <errno.h>
  29
  30 #include <cairo.h>
  31
  32 #if CAIRO_HAS_PS_SURFACE
  33 #include <cairo-ps.h>
  34 #endif
  35
  36 #if CAIRO_HAS_PDF_SURFACE
  37 #include <cairo-pdf.h>
  38 #endif
  39
  40 #if CAIRO_HAS_SVG_SURFACE
  41 #include <cairo-svg.h>
  42 #endif
  43
  44 #include "cairo-test.h"
  45
  46 /* The main test suite doesn't test the *_create_for_stream
  47  * constructors for the PDF, PS and SVG surface, so we do that here.
  48  * We draw to an in-memory buffer using the stream constructor and
  49  * compare the output to the contents of a file writting using the
  50  * file constructor.
  51  */
  52
  53 #define MAX_OUTPUT_SIZE 4096
  54
  55 #define WIDTH_IN_INCHES  3
  56 #define HEIGHT_IN_INCHES 3
  57 #define WIDTH_IN_POINTS  (WIDTH_IN_INCHES  * 72.0)
  58 #define HEIGHT_IN_POINTS (HEIGHT_IN_INCHES * 72.0)
  59
  60 static cairo_test_status_t
  61 draw (cairo_t *cr, int width, int height)
  62 {
  63     /* Just draw a rectangle. */
  64
  65     cairo_rectangle (cr, width / 10., height /10.,
  66                      width - 2 * width / 10.,
  67                      height - 2 * height /10.);
  68     cairo_fill (cr);
  69
  70     cairo_show_page (cr);
  71
  72     return CAIRO_TEST_SUCCESS;
  73 }
  74
  75 static void
  76 draw_to (cairo_surface_t *surface)
  77 {
  78     cairo_t *cr;
  79
  80     cr = cairo_create (surface);
  81
  82     draw (cr, WIDTH_IN_POINTS, HEIGHT_IN_POINTS);
  83
  84     cairo_destroy (cr);
  85 }
  86
  87 typedef struct _write_closure {
  88     char buffer[MAX_OUTPUT_SIZE];
  89     size_t index;
  90     cairo_test_status_t status;
  91 } write_closure_t;
  92
  93 static cairo_status_t
  94 bad_write (void         *closure,
  95            const unsigned char  *data,
  96            unsigned int  length)
  97 {
  98     return CAIRO_STATUS_WRITE_ERROR;
  99 }
 100
 101 static cairo_status_t
 102 test_write (void                *closure,
 103             const unsigned char *data,
 104             unsigned int         length)
 105 {
 106     write_closure_t *wc = closure;
 107
 108     if (wc->index + length >= sizeof wc->buffer) {
 109         cairo_test_log ("Error: out of bounds in write callback\n");
 110         wc->status = CAIRO_TEST_FAILURE;
 111         return CAIRO_STATUS_SUCCESS;
 112     }
 113
 114     memcpy (&wc->buffer[wc->index], data, length);
 115     wc->index += length;
 116
 117     return CAIRO_STATUS_SUCCESS;
 118 }
 119
 120
 121 typedef cairo_surface_t *
 122 (*file_constructor_t) (const char              *filename,
 123                        double                   width_in_points,
 124                        double                   height_in_points);
 125
 126 typedef cairo_surface_t *
 127 (*stream_constructor_t) (cairo_write_func_t     write_func,
 128                          void                  *closure,
 129                          double                 width_in_points,
 130                          double                 height_in_points);
 131
 132 static cairo_test_status_t
 133 test_surface (const char                 *backend,
 134               const char                 *filename,
 135               file_constructor_t         file_constructor,
 136               stream_constructor_t       stream_constructor)
 137 {
 138     cairo_surface_t *surface;
 139     write_closure_t wc;
 140     char file_contents[MAX_OUTPUT_SIZE];
 141     cairo_status_t status;
 142     FILE *fp;
 143
 144     /* test propagation of user errors */
 145     surface = stream_constructor (bad_write, &wc,
 146                                   WIDTH_IN_POINTS, HEIGHT_IN_POINTS);
 147
 148     status = cairo_surface_status (surface);
 149     if (status) {
 150         cairo_test_log ("%s: Failed to create surface for stream.\n", backend);
 151         return CAIRO_TEST_FAILURE;
 152     }
 153
 154     draw_to (surface);
 155
 156     cairo_surface_finish (surface);
 157     status = cairo_surface_status (surface);
 158     cairo_surface_destroy (surface);
 159
 160     if (status != CAIRO_STATUS_WRITE_ERROR) {
 161         cairo_test_log ("%s: Error: expected \"write error\", but received \"%s\".\n",
 162                         backend, cairo_status_to_string (status));
 163         return CAIRO_TEST_FAILURE;
 164     }
 165
 166     /* construct the real surface */
 167     wc.status = CAIRO_TEST_SUCCESS;
 168     wc.index = 0;
 169
 170     surface = stream_constructor (test_write, &wc,
 171                                   WIDTH_IN_POINTS, HEIGHT_IN_POINTS);
 172
 173     status = cairo_surface_status (surface);
 174     if (status) {
 175         cairo_test_log ("%s: Failed to create surface for stream.\n", backend);
 176         return CAIRO_TEST_FAILURE;
 177     }
 178
 179     draw_to (surface);
 180
 181     cairo_surface_destroy (surface);
 182
 183     if (wc.status != CAIRO_TEST_SUCCESS) {
 184         /* Error already reported. */
 185         return wc.status;
 186     }
 187
 188     surface = file_constructor (filename,
 189                                 WIDTH_IN_POINTS, HEIGHT_IN_POINTS);
 190
 191     status = cairo_surface_status (surface);
 192     if (status) {
 193         cairo_test_log ("%s: Failed to create surface for file %s: %s.\n",
 194                         backend, filename, cairo_status_to_string (status));
 195         return CAIRO_TEST_FAILURE;
 196     }
 197
 198     draw_to (surface);
 199
 200     cairo_surface_destroy (surface);
 201
 202     fp = fopen (filename, "r");
 203     if (fp == NULL) {
 204         cairo_test_log ("%s: Failed to open %s for reading: %s.\n",
 205                         backend, filename, strerror (errno));
 206         return CAIRO_TEST_FAILURE;
 207     }
 208
 209     if (fread (file_contents, 1, wc.index, fp) != wc.index) {
 210         cairo_test_log ("%s: Failed to read %s: %s.\n",
 211                         backend, filename, strerror (errno));
 212         fclose (fp);
 213         return CAIRO_TEST_FAILURE;
 214     }
 215
 216     if (memcmp (file_contents, wc.buffer, wc.index) != 0) {
 217         cairo_test_log ("%s: Stream based output differ from file output for %s.\n",
 218                         backend, filename);
 219         fclose (fp);
 220         return CAIRO_TEST_FAILURE;
 221     }
 222
 223     fclose (fp);
 224
 225     return CAIRO_TEST_SUCCESS;
 226 }
 227
 228 int
 229 main (void)
 230 {
 231     cairo_test_status_t status = CAIRO_TEST_SUCCESS;
 232     cairo_test_status_t test_status;
 233     const char test_name[] = "create-for-stream";
 234
 235     cairo_test_init (test_name);
 236
 237 #if CAIRO_HAS_PS_SURFACE
 238     test_status = test_surface ("ps", "create-for-stream.ps",
 239                                 cairo_ps_surface_create,
 240                                 cairo_ps_surface_create_for_stream);
 241     cairo_test_log ("TEST: %s TARGET: %s RESULT: %s\n",
 242                     test_name, "ps",
 243                     test_status ? "FAIL" : "PASS");
 244     if (status == CAIRO_TEST_SUCCESS)
 245         status = test_status;
 246 #endif
 247
 248 #if CAIRO_HAS_PDF_SURFACE
 249     test_status = test_surface ("pdf", "create-for-stream.pdf",
 250                                 cairo_pdf_surface_create,
 251                                 cairo_pdf_surface_create_for_stream);
 252     cairo_test_log ("TEST: %s TARGET: %s RESULT: %s\n",
 253                     test_name, "pdf",
 254                     test_status ? "FAIL" : "PASS");
 255     if (status == CAIRO_TEST_SUCCESS)
 256         status = test_status;
 257 #endif
 258
 259 #if CAIRO_HAS_SVG_SURFACE
 260     test_status = test_surface ("svg", "create-for-stream.svg",
 261                                 cairo_svg_surface_create,
 262                                 cairo_svg_surface_create_for_stream);
 263     cairo_test_log ("TEST: %s TARGET: %s RESULT: %s\n",
 264                     test_name, "svg",
 265                     test_status ? "FAIL" : "PASS");
 266     if (status == CAIRO_TEST_SUCCESS)
 267         status = test_status;
 268 #endif
 269
 270     cairo_test_fini ();
 271
 272     return status;
 273 }