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Diffstat (limited to 'Build/source/libs/cairo/cairo-1.12.8/src/cairo-spans-private.h')
| -rw-r--r-- | Build/source/libs/cairo/cairo-1.12.8/src/cairo-spans-private.h | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/Build/source/libs/cairo/cairo-1.12.8/src/cairo-spans-private.h b/Build/source/libs/cairo/cairo-1.12.8/src/cairo-spans-private.h new file mode 100644 index 00000000000..c42b5afa733 --- /dev/null +++ b/Build/source/libs/cairo/cairo-1.12.8/src/cairo-spans-private.h @@ -0,0 +1,206 @@ +/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */ +/* cairo - a vector graphics library with display and print output + * + * Copyright (c) 2008 M Joonas Pihlaja + * + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, + * copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following + * conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES + * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT + * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + */ +#ifndef CAIRO_SPANS_PRIVATE_H +#define CAIRO_SPANS_PRIVATE_H +#include "cairo-types-private.h" +#include "cairo-compiler-private.h" + +/* Number of bits of precision used for alpha. */ +#define CAIRO_SPANS_UNIT_COVERAGE_BITS 8 +#define CAIRO_SPANS_UNIT_COVERAGE ((1 << CAIRO_SPANS_UNIT_COVERAGE_BITS)-1) + +/* A structure representing an open-ended horizontal span of constant + * pixel coverage. */ +typedef struct _cairo_half_open_span { + int32_t x; /* The inclusive x-coordinate of the start of the span. */ + uint8_t coverage; /* The pixel coverage for the pixels to the right. */ + uint8_t inverse; /* between regular mask and clip */ +} cairo_half_open_span_t; + +/* Span renderer interface. Instances of renderers are provided by + * surfaces if they want to composite spans instead of trapezoids. */ +typedef struct _cairo_span_renderer cairo_span_renderer_t; +struct _cairo_span_renderer { + /* Private status variable. */ + cairo_status_t status; + + /* Called to destroy the renderer. */ + cairo_destroy_func_t destroy; + + /* Render the spans on row y of the destination by whatever compositing + * method is required. */ + cairo_warn cairo_status_t + (*render_rows) (void *abstract_renderer, + int y, int height, + const cairo_half_open_span_t *coverages, + unsigned num_coverages); + + /* Called after all rows have been rendered to perform whatever + * final rendering step is required. This function is called just + * once before the renderer is destroyed. */ + cairo_status_t (*finish) (void *abstract_renderer); +}; + +/* Scan converter interface. */ +typedef struct _cairo_scan_converter cairo_scan_converter_t; +struct _cairo_scan_converter { + /* Destroy this scan converter. */ + cairo_destroy_func_t destroy; + + /* Generates coverage spans for rows for the added edges and calls + * the renderer function for each row. After generating spans the + * only valid thing to do with the converter is to destroy it. */ + cairo_status_t (*generate) (void *abstract_converter, + cairo_span_renderer_t *renderer); + + /* Private status. Read with _cairo_scan_converter_status(). */ + cairo_status_t status; +}; + +/* Scan converter constructors. */ + +cairo_private cairo_scan_converter_t * +_cairo_tor_scan_converter_create (int xmin, + int ymin, + int xmax, + int ymax, + cairo_fill_rule_t fill_rule, + cairo_antialias_t antialias); +cairo_private cairo_status_t +_cairo_tor_scan_converter_add_polygon (void *converter, + const cairo_polygon_t *polygon); + +cairo_private cairo_scan_converter_t * +_cairo_tor22_scan_converter_create (int xmin, + int ymin, + int xmax, + int ymax, + cairo_fill_rule_t fill_rule, + cairo_antialias_t antialias); +cairo_private cairo_status_t +_cairo_tor22_scan_converter_add_polygon (void *converter, + const cairo_polygon_t *polygon); + +cairo_private cairo_scan_converter_t * +_cairo_mono_scan_converter_create (int xmin, + int ymin, + int xmax, + int ymax, + cairo_fill_rule_t fill_rule); +cairo_private cairo_status_t +_cairo_mono_scan_converter_add_polygon (void *converter, + const cairo_polygon_t *polygon); + +cairo_private cairo_scan_converter_t * +_cairo_clip_tor_scan_converter_create (cairo_clip_t *clip, + cairo_polygon_t *polygon, + cairo_fill_rule_t fill_rule, + cairo_antialias_t antialias); + +typedef struct _cairo_rectangular_scan_converter { + cairo_scan_converter_t base; + + cairo_box_t extents; + + struct _cairo_rectangular_scan_converter_chunk { + struct _cairo_rectangular_scan_converter_chunk *next; + void *base; + int count; + int size; + } chunks, *tail; + char buf[CAIRO_STACK_BUFFER_SIZE]; + int num_rectangles; +} cairo_rectangular_scan_converter_t; + +cairo_private void +_cairo_rectangular_scan_converter_init (cairo_rectangular_scan_converter_t *self, + const cairo_rectangle_int_t *extents); + +cairo_private cairo_status_t +_cairo_rectangular_scan_converter_add_box (cairo_rectangular_scan_converter_t *self, + const cairo_box_t *box, + int dir); + +typedef struct _cairo_botor_scan_converter { + cairo_scan_converter_t base; + + cairo_box_t extents; + cairo_fill_rule_t fill_rule; + + int xmin, xmax; + + struct _cairo_botor_scan_converter_chunk { + struct _cairo_botor_scan_converter_chunk *next; + void *base; + int count; + int size; + } chunks, *tail; + char buf[CAIRO_STACK_BUFFER_SIZE]; + int num_edges; +} cairo_botor_scan_converter_t; + +cairo_private void +_cairo_botor_scan_converter_init (cairo_botor_scan_converter_t *self, + const cairo_box_t *extents, + cairo_fill_rule_t fill_rule); + +/* cairo-spans.c: */ + +cairo_private cairo_scan_converter_t * +_cairo_scan_converter_create_in_error (cairo_status_t error); + +cairo_private cairo_status_t +_cairo_scan_converter_status (void *abstract_converter); + +cairo_private cairo_status_t +_cairo_scan_converter_set_error (void *abstract_converter, + cairo_status_t error); + +cairo_private cairo_span_renderer_t * +_cairo_span_renderer_create_in_error (cairo_status_t error); + +cairo_private cairo_status_t +_cairo_span_renderer_status (void *abstract_renderer); + +/* Set the renderer into an error state. This sets all the method + * pointers except ->destroy() of the renderer to no-op + * implementations that just return the error status. */ +cairo_private cairo_status_t +_cairo_span_renderer_set_error (void *abstract_renderer, + cairo_status_t error); + +cairo_private cairo_status_t +_cairo_surface_composite_polygon (cairo_surface_t *surface, + cairo_operator_t op, + const cairo_pattern_t *pattern, + cairo_fill_rule_t fill_rule, + cairo_antialias_t antialias, + const cairo_composite_rectangles_t *rects, + cairo_polygon_t *polygon, + cairo_region_t *clip_region); + +#endif /* CAIRO_SPANS_PRIVATE_H */ |