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  1. /* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
  2. /* cairo - a vector graphics library with display and print output
  3.  *
  4.  * Copyright (c) 2008  M Joonas Pihlaja
  5.  *
  6.  * Permission is hereby granted, free of charge, to any person
  7.  * obtaining a copy of this software and associated documentation
  8.  * files (the "Software"), to deal in the Software without
  9.  * restriction, including without limitation the rights to use,
  10.  * copy, modify, merge, publish, distribute, sublicense, and/or sell
  11.  * copies of the Software, and to permit persons to whom the
  12.  * Software is furnished to do so, subject to the following
  13.  * conditions:
  14.  *
  15.  * The above copyright notice and this permission notice shall be
  16.  * included in all copies or substantial portions of the Software.
  17.  *
  18.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19.  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  20.  * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  21.  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  22.  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  23.  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  24.  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  25.  * OTHER DEALINGS IN THE SOFTWARE.
  26.  */
  27. #include "cairoint.h"
  28.  
  29. #include "cairo-composite-rectangles-private.h"
  30. #include "cairo-clip-private.h"
  31. #include "cairo-error-private.h"
  32. #include "cairo-fixed-private.h"
  33. #include "cairo-types-private.h"
  34.  
  35. static void
  36. _cairo_nil_destroy (void *abstract)
  37. {
  38.     (void) abstract;
  39. }
  40.  
  41. static cairo_status_t
  42. _cairo_nil_scan_converter_generate (void *abstract_converter,
  43.                                     cairo_span_renderer_t *renderer)
  44. {
  45.     (void) abstract_converter;
  46.     (void) renderer;
  47.     return _cairo_scan_converter_status (abstract_converter);
  48. }
  49.  
  50. cairo_status_t
  51. _cairo_scan_converter_status (void *abstract_converter)
  52. {
  53.     cairo_scan_converter_t *converter = abstract_converter;
  54.     return converter->status;
  55. }
  56.  
  57. cairo_status_t
  58. _cairo_scan_converter_set_error (void *abstract_converter,
  59.                                  cairo_status_t error)
  60. {
  61.     cairo_scan_converter_t *converter = abstract_converter;
  62.     if (error == CAIRO_STATUS_SUCCESS)
  63.         ASSERT_NOT_REACHED;
  64.     if (converter->status == CAIRO_STATUS_SUCCESS) {
  65.         converter->generate = _cairo_nil_scan_converter_generate;
  66.         converter->status = error;
  67.     }
  68.     return converter->status;
  69. }
  70.  
  71. static void
  72. _cairo_nil_scan_converter_init (cairo_scan_converter_t *converter,
  73.                                 cairo_status_t status)
  74. {
  75.     converter->destroy = _cairo_nil_destroy;
  76.     converter->status = CAIRO_STATUS_SUCCESS;
  77.     status = _cairo_scan_converter_set_error (converter, status);
  78. }
  79.  
  80. cairo_scan_converter_t *
  81. _cairo_scan_converter_create_in_error (cairo_status_t status)
  82. {
  83. #define RETURN_NIL {\
  84.             static cairo_scan_converter_t nil;\
  85.             _cairo_nil_scan_converter_init (&nil, status);\
  86.             return &nil;\
  87.         }
  88.     switch (status) {
  89.     case CAIRO_STATUS_SUCCESS:
  90.     case CAIRO_STATUS_LAST_STATUS:
  91.         ASSERT_NOT_REACHED;
  92.         break;
  93.     case CAIRO_STATUS_INVALID_RESTORE: RETURN_NIL;
  94.     case CAIRO_STATUS_INVALID_POP_GROUP: RETURN_NIL;
  95.     case CAIRO_STATUS_NO_CURRENT_POINT: RETURN_NIL;
  96.     case CAIRO_STATUS_INVALID_MATRIX: RETURN_NIL;
  97.     case CAIRO_STATUS_INVALID_STATUS: RETURN_NIL;
  98.     case CAIRO_STATUS_NULL_POINTER: RETURN_NIL;
  99.     case CAIRO_STATUS_INVALID_STRING: RETURN_NIL;
  100.     case CAIRO_STATUS_INVALID_PATH_DATA: RETURN_NIL;
  101.     case CAIRO_STATUS_READ_ERROR: RETURN_NIL;
  102.     case CAIRO_STATUS_WRITE_ERROR: RETURN_NIL;
  103.     case CAIRO_STATUS_SURFACE_FINISHED: RETURN_NIL;
  104.     case CAIRO_STATUS_SURFACE_TYPE_MISMATCH: RETURN_NIL;
  105.     case CAIRO_STATUS_PATTERN_TYPE_MISMATCH: RETURN_NIL;
  106.     case CAIRO_STATUS_INVALID_CONTENT: RETURN_NIL;
  107.     case CAIRO_STATUS_INVALID_FORMAT: RETURN_NIL;
  108.     case CAIRO_STATUS_INVALID_VISUAL: RETURN_NIL;
  109.     case CAIRO_STATUS_FILE_NOT_FOUND: RETURN_NIL;
  110.     case CAIRO_STATUS_INVALID_DASH: RETURN_NIL;
  111.     case CAIRO_STATUS_INVALID_DSC_COMMENT: RETURN_NIL;
  112.     case CAIRO_STATUS_INVALID_INDEX: RETURN_NIL;
  113.     case CAIRO_STATUS_CLIP_NOT_REPRESENTABLE: RETURN_NIL;
  114.     case CAIRO_STATUS_TEMP_FILE_ERROR: RETURN_NIL;
  115.     case CAIRO_STATUS_INVALID_STRIDE: RETURN_NIL;
  116.     case CAIRO_STATUS_FONT_TYPE_MISMATCH: RETURN_NIL;
  117.     case CAIRO_STATUS_USER_FONT_IMMUTABLE: RETURN_NIL;
  118.     case CAIRO_STATUS_USER_FONT_ERROR: RETURN_NIL;
  119.     case CAIRO_STATUS_NEGATIVE_COUNT: RETURN_NIL;
  120.     case CAIRO_STATUS_INVALID_CLUSTERS: RETURN_NIL;
  121.     case CAIRO_STATUS_INVALID_SLANT: RETURN_NIL;
  122.     case CAIRO_STATUS_INVALID_WEIGHT: RETURN_NIL;
  123.     case CAIRO_STATUS_NO_MEMORY: RETURN_NIL;
  124.     case CAIRO_STATUS_INVALID_SIZE: RETURN_NIL;
  125.     case CAIRO_STATUS_USER_FONT_NOT_IMPLEMENTED: RETURN_NIL;
  126.     case CAIRO_STATUS_DEVICE_TYPE_MISMATCH: RETURN_NIL;
  127.     case CAIRO_STATUS_DEVICE_ERROR: RETURN_NIL;
  128.     case CAIRO_STATUS_INVALID_MESH_CONSTRUCTION: RETURN_NIL;
  129.     case CAIRO_STATUS_DEVICE_FINISHED: RETURN_NIL;
  130.     default:
  131.         break;
  132.     }
  133.     status = CAIRO_STATUS_NO_MEMORY;
  134.     RETURN_NIL;
  135. #undef RETURN_NIL
  136. }
  137.  
  138. static cairo_status_t
  139. _cairo_nil_span_renderer_render_rows (
  140.     void                                *abstract_renderer,
  141.     int                                  y,
  142.     int                                  height,
  143.     const cairo_half_open_span_t        *coverages,
  144.     unsigned                             num_coverages)
  145. {
  146.     (void) y;
  147.     (void) height;
  148.     (void) coverages;
  149.     (void) num_coverages;
  150.     return _cairo_span_renderer_status (abstract_renderer);
  151. }
  152.  
  153. static cairo_status_t
  154. _cairo_nil_span_renderer_finish (void *abstract_renderer)
  155. {
  156.     return _cairo_span_renderer_status (abstract_renderer);
  157. }
  158.  
  159. cairo_status_t
  160. _cairo_span_renderer_status (void *abstract_renderer)
  161. {
  162.     cairo_span_renderer_t *renderer = abstract_renderer;
  163.     return renderer->status;
  164. }
  165.  
  166. cairo_status_t
  167. _cairo_span_renderer_set_error (
  168.     void *abstract_renderer,
  169.     cairo_status_t error)
  170. {
  171.     cairo_span_renderer_t *renderer = abstract_renderer;
  172.     if (error == CAIRO_STATUS_SUCCESS) {
  173.         ASSERT_NOT_REACHED;
  174.     }
  175.     if (renderer->status == CAIRO_STATUS_SUCCESS) {
  176.         renderer->render_rows = _cairo_nil_span_renderer_render_rows;
  177.         renderer->finish = _cairo_nil_span_renderer_finish;
  178.         renderer->status = error;
  179.     }
  180.     return renderer->status;
  181. }
  182.  
  183. static void
  184. _cairo_nil_span_renderer_init (cairo_span_renderer_t *renderer,
  185.                                cairo_status_t status)
  186. {
  187.     renderer->destroy = _cairo_nil_destroy;
  188.     renderer->status = CAIRO_STATUS_SUCCESS;
  189.     status = _cairo_span_renderer_set_error (renderer, status);
  190. }
  191.  
  192. cairo_span_renderer_t *
  193. _cairo_span_renderer_create_in_error (cairo_status_t status)
  194. {
  195. #define RETURN_NIL {\
  196.             static cairo_span_renderer_t nil;\
  197.             _cairo_nil_span_renderer_init (&nil, status);\
  198.             return &nil;\
  199.         }
  200.     switch (status) {
  201.     case CAIRO_STATUS_SUCCESS:
  202.     case CAIRO_STATUS_LAST_STATUS:
  203.         ASSERT_NOT_REACHED;
  204.         break;
  205.     case CAIRO_STATUS_INVALID_RESTORE: RETURN_NIL;
  206.     case CAIRO_STATUS_INVALID_POP_GROUP: RETURN_NIL;
  207.     case CAIRO_STATUS_NO_CURRENT_POINT: RETURN_NIL;
  208.     case CAIRO_STATUS_INVALID_MATRIX: RETURN_NIL;
  209.     case CAIRO_STATUS_INVALID_STATUS: RETURN_NIL;
  210.     case CAIRO_STATUS_NULL_POINTER: RETURN_NIL;
  211.     case CAIRO_STATUS_INVALID_STRING: RETURN_NIL;
  212.     case CAIRO_STATUS_INVALID_PATH_DATA: RETURN_NIL;
  213.     case CAIRO_STATUS_READ_ERROR: RETURN_NIL;
  214.     case CAIRO_STATUS_WRITE_ERROR: RETURN_NIL;
  215.     case CAIRO_STATUS_SURFACE_FINISHED: RETURN_NIL;
  216.     case CAIRO_STATUS_SURFACE_TYPE_MISMATCH: RETURN_NIL;
  217.     case CAIRO_STATUS_PATTERN_TYPE_MISMATCH: RETURN_NIL;
  218.     case CAIRO_STATUS_INVALID_CONTENT: RETURN_NIL;
  219.     case CAIRO_STATUS_INVALID_FORMAT: RETURN_NIL;
  220.     case CAIRO_STATUS_INVALID_VISUAL: RETURN_NIL;
  221.     case CAIRO_STATUS_FILE_NOT_FOUND: RETURN_NIL;
  222.     case CAIRO_STATUS_INVALID_DASH: RETURN_NIL;
  223.     case CAIRO_STATUS_INVALID_DSC_COMMENT: RETURN_NIL;
  224.     case CAIRO_STATUS_INVALID_INDEX: RETURN_NIL;
  225.     case CAIRO_STATUS_CLIP_NOT_REPRESENTABLE: RETURN_NIL;
  226.     case CAIRO_STATUS_TEMP_FILE_ERROR: RETURN_NIL;
  227.     case CAIRO_STATUS_INVALID_STRIDE: RETURN_NIL;
  228.     case CAIRO_STATUS_FONT_TYPE_MISMATCH: RETURN_NIL;
  229.     case CAIRO_STATUS_USER_FONT_IMMUTABLE: RETURN_NIL;
  230.     case CAIRO_STATUS_USER_FONT_ERROR: RETURN_NIL;
  231.     case CAIRO_STATUS_NEGATIVE_COUNT: RETURN_NIL;
  232.     case CAIRO_STATUS_INVALID_CLUSTERS: RETURN_NIL;
  233.     case CAIRO_STATUS_INVALID_SLANT: RETURN_NIL;
  234.     case CAIRO_STATUS_INVALID_WEIGHT: RETURN_NIL;
  235.     case CAIRO_STATUS_NO_MEMORY: RETURN_NIL;
  236.     case CAIRO_STATUS_INVALID_SIZE: RETURN_NIL;
  237.     case CAIRO_STATUS_USER_FONT_NOT_IMPLEMENTED: RETURN_NIL;
  238.     case CAIRO_STATUS_DEVICE_TYPE_MISMATCH: RETURN_NIL;
  239.     case CAIRO_STATUS_DEVICE_ERROR: RETURN_NIL;
  240.     case CAIRO_STATUS_INVALID_MESH_CONSTRUCTION: RETURN_NIL;
  241.     case CAIRO_STATUS_DEVICE_FINISHED: RETURN_NIL;
  242.     default:
  243.         break;
  244.     }
  245.     status = CAIRO_STATUS_NO_MEMORY;
  246.     RETURN_NIL;
  247. #undef RETURN_NIL
  248. }
  249.