/
hatchbrush.c
1371 lines (1258 loc) · 49.6 KB
/
hatchbrush.c
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/*
* hatchbrush.c
*
* Copyright (C) 2004,2006-2007 Novell, Inc. http://www.novell.com
*
* 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.
*
* Authors:
* Ravindra (rkumar@novell.com)
*
*/
/* FIXME - match hatchbrush use the RenderOrigin stored in graphics */
#include "hatchbrush-private.h"
#include "graphics-private.h"
static GpStatus gdip_hatch_setup (GpGraphics *graphics, GpBrush *brush);
static GpStatus gdip_hatch_clone (GpBrush *brush, GpBrush **clonedBrush);
static GpStatus gdip_hatch_destroy (GpBrush *brush);
/*
* We keep a single copy of vtable for
* all instances of hatchbrush.
*/
static BrushClass vtable = { BrushTypeHatchFill,
gdip_hatch_setup,
gdip_hatch_clone,
gdip_hatch_destroy };
static void
gdip_hatch_init (GpHatch *hatch)
{
gdip_brush_init (&hatch->base, &vtable);
hatch->backColor = 0;
hatch->pattern = NULL;
}
static GpHatch*
gdip_hatch_new (void)
{
GpHatch *result = (GpHatch *) GdipAlloc (sizeof (GpHatch));
if (result)
gdip_hatch_init (result);
return result;
}
/* helper functions */
static cairo_t*
create_hatch_context (cairo_surface_t *hatch, cairo_line_cap_t line_cap, BOOL antialias)
{
cairo_t *ct = cairo_create (hatch);
if (cairo_status (ct) != CAIRO_STATUS_SUCCESS) {
cairo_destroy (ct);
return NULL;
}
cairo_set_line_cap (ct, line_cap);
if (!antialias)
cairo_set_antialias (ct, CAIRO_ANTIALIAS_NONE);
return ct;
}
static void
set_color (cairo_t *ct, int color)
{
int R = (color & 0x00FF0000) >> 16;
int G = (color & 0x0000FF00) >> 8;
int B = (color & 0x000000FF);
cairo_set_source_rgb (ct, (double) R / 255.0, (double) G / 255.0, (double) B / 255.0);
}
static void
draw_background (cairo_t *ct, int backcolor, int width, int height)
{
set_color (ct, backcolor);
cairo_rectangle (ct, 0, 0, width, height);
cairo_fill (ct);
}
/* The values used below are obtained by hit and trial to get the results similar to that of MS. */
static const double hatches_const[][3] = {
/* HatchStyleHorizontal */ { HATCH_SIZE, HATCH_SIZE, LINE_WIDTH },
/* HatchStyleVertical */ { HATCH_SIZE, HATCH_SIZE, LINE_WIDTH },
/* HatchStyleForwardDiagonal */ { HATCH_SIZE + 1.0, HATCH_SIZE + 1.0, LINE_WIDTH },
/* HatchStyleBackwardDiagonal */ { HATCH_SIZE + 1.0, HATCH_SIZE + 1.0, LINE_WIDTH },
/* HatchStyleCross */ { HATCH_SIZE + 2.0, HATCH_SIZE + 2.0, LINE_WIDTH },
/* HatchStyleDiagonalCross */ { HATCH_SIZE, HATCH_SIZE, LINE_WIDTH },
/* HatchStyle05Percent */ { HATCH_SIZE + 1.0, HATCH_SIZE + 1.0, LINE_WIDTH },
/* HatchStyle10Percent */ { HATCH_SIZE + 1.0, 4.0, LINE_WIDTH },
/* HatchStyle20Percent */ { 4.0, 4.0, LINE_WIDTH },
/* HatchStyle25Percent */ { 4.0, 2.0, LINE_WIDTH },
/* HatchStyle30Percent */ { 4.0, 4.0, LINE_WIDTH },
/* HatchStyle40Percent */ { HATCH_SIZE + 1.0, HATCH_SIZE + 1.0, LINE_WIDTH },
/* HatchStyle50Percent */ { 2.0, 2.0, LINE_WIDTH },
/* HatchStyle60Percent */ { 4.0, 4.0, LINE_WIDTH },
/* HatchStyle70Percent */ { 4.0, 2.0, LINE_WIDTH },
/* HatchStyle75Percent */ { 4.0, 4.0, LINE_WIDTH },
/* HatchStyle80Percent */ { HATCH_SIZE + 1.0, 4.0, LINE_WIDTH },
/* HatchStyle90Percent */ { HATCH_SIZE + 1.0, HATCH_SIZE + 1.0, LINE_WIDTH },
/* HatchStyleLightDownwardDiagonal */ { (HATCH_SIZE + 1.0) * 0.5, (HATCH_SIZE + 1.0) * 0.5, LINE_WIDTH },
/* HatchStyleLightUpwardDiagonal */ { (HATCH_SIZE + 1.0) * 0.5, (HATCH_SIZE + 1.0) * 0.5, LINE_WIDTH },
/* HatchStyleDarkDownwardDiagonal */ { 4.0, 4.0, LINE_WIDTH },
/* HatchStyleDarkUpwardDiagonal */ { 4.0, 4.0, LINE_WIDTH },
/* HatchStyleWideDownwardDiagonal */ { HATCH_SIZE + 1.0, HATCH_SIZE + 1.0, LINE_WIDTH * 2.0 },
/* HatchStyleWideUpwardDiagonal */ { HATCH_SIZE + 1.0, HATCH_SIZE + 1.0, LINE_WIDTH * 2.0 },
/* HatchStyleLightVertical */ { HATCH_SIZE * 0.7, HATCH_SIZE * 0.7, LINE_WIDTH },
/* HatchStyleLightHorizontal */ { HATCH_SIZE * 0.7, HATCH_SIZE * 0.7, LINE_WIDTH },
/* HatchStyleNarrowVertical */ { 2.0, 2.0, LINE_WIDTH },
/* HatchStyleNarrowHorizontal */ { 2.0, 2.0, LINE_WIDTH },
/* HatchStyleDarkVertical */ { HATCH_SIZE * 0.6, HATCH_SIZE * 0.6, LINE_WIDTH * 2.0 },
/* HatchStyleDarkHorizontal */ { HATCH_SIZE * 0.6, HATCH_SIZE * 0.6, LINE_WIDTH * 2.0 },
/* HatchStyleDashedDownwardDiagonal */ { 4.0, 8.0, LINE_WIDTH },
/* HatchStyleDashedUpwardDiagonal */ { 4.0, 8.0, LINE_WIDTH },
/* HatchStyleDashedHorizontal */ { 8.0, 8.0, LINE_WIDTH },
/* HatchStyleDashedVertical */ { 8.0, 8.0, LINE_WIDTH },
/* HatchStyleSmallConfetti */ { HATCH_SIZE + 1.0, HATCH_SIZE + 1.0, LINE_WIDTH },
/* HatchStyleLargeConfetti */ { HATCH_SIZE + 1.0, HATCH_SIZE + 1.0, LINE_WIDTH },
/* HatchStyleZigZag */ { HATCH_SIZE + 1.0, 4.0, LINE_WIDTH },
/* HatchStyleWave */ { HATCH_SIZE + 2.0, (HATCH_SIZE + 2.0) / 2.0, LINE_WIDTH },
/* HatchStyleDiagonalBrick */ { HATCH_SIZE + 0.0, HATCH_SIZE + 0.0, LINE_WIDTH },
/* HatchStyleHorizontalBrick */ { HATCH_SIZE + 1.0, HATCH_SIZE + 1.0, LINE_WIDTH },
/* HatchStyleWeave */ { HATCH_SIZE + 1.0, HATCH_SIZE + 1.0, LINE_WIDTH },
/* HatchStylePlaid */ { HATCH_SIZE + 1.0, HATCH_SIZE + 1.0, LINE_WIDTH },
/* HatchStyleDivot */ { 9.0, 9.0, LINE_WIDTH },
/* HatchStyleDottedGrid */ { HATCH_SIZE + 1.0, HATCH_SIZE + 1.0, LINE_WIDTH },
/* HatchStyleDottedDiamond */ { HATCH_SIZE + 1.0, HATCH_SIZE + 1.0, LINE_WIDTH },
/* HatchStyleShingle */ { HATCH_SIZE + 1.0, HATCH_SIZE - 1.0, LINE_WIDTH },
/* HatchStyleTrellis */ { 4.0, 4.0, LINE_WIDTH },
/* HatchStyleSphere */ { 9.0, 9.0, LINE_WIDTH },
/* HatchStyleSmallGrid */ { (HATCH_SIZE + 2.0) * 0.6, (HATCH_SIZE + 2.0) * 0.6, LINE_WIDTH },
/* HatchStyleSmallCheckerBoard */ { 4.0, 4.0, LINE_WIDTH },
/* HatchStyleLargeCheckerBoard */ { 8.0, 8.0, LINE_WIDTH },
/* HatchStyleOutlinedDiamond */ { HATCH_SIZE + 1.0, HATCH_SIZE + 1.0, LINE_WIDTH },
/* HatchStyleSolidDiamond */ { HATCH_SIZE + 1.0, HATCH_SIZE + 1.0, LINE_WIDTH }
};
/*
* functions to draw different hatch styles.
*/
static cairo_status_t
draw_horizontal_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
double line_width = gdip_hatch_get_line_width (hbr);
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_size, hatch_size);
/* draw horizontal line in the foreground color */
set_color (ct2, hbr->foreColor);
cairo_set_line_width (ct2, line_width);
cairo_move_to (ct2, 0, hatch_size / 2.0);
cairo_line_to (ct2, hatch_size + CAIRO_AA_OFFSET_X, hatch_size / 2.0 + CAIRO_AA_OFFSET_Y);
cairo_stroke (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_vertical_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
double line_width = gdip_hatch_get_line_width (hbr);
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_size, hatch_size);
/* draw vertical line in the foreground */
set_color (ct2, hbr->foreColor);
cairo_set_line_width (ct2, line_width);
cairo_move_to (ct2, hatch_size / 2.0 + CAIRO_AA_OFFSET_X, CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_size / 2.0 + CAIRO_AA_OFFSET_X, hatch_size + CAIRO_AA_OFFSET_Y);
cairo_stroke (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_forward_diagonal_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
double line_width = gdip_hatch_get_line_width (hbr);
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, TRUE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_size, hatch_size);
/* draw forward diagonal lines in the foreground */
set_color (ct2, hbr->foreColor);
cairo_set_line_width (ct2, line_width);
cairo_move_to (ct2, 0, hatch_size / 2.0);
cairo_line_to (ct2, hatch_size / 2.0, hatch_size);
cairo_move_to (ct2, hatch_size / 2.0, 0);
cairo_line_to (ct2, hatch_size, hatch_size / 2.0);
cairo_stroke (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_backward_diagonal_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
double line_width = gdip_hatch_get_line_width (hbr);
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, TRUE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_size, hatch_size);
/* draw backward diagonal lines in the foreground */
set_color (ct2, hbr->foreColor);
cairo_set_line_width (ct2, line_width);
cairo_move_to (ct2, hatch_size / 2.0, 0);
cairo_line_to (ct2, 0, hatch_size / 2.0 );
cairo_move_to (ct2, hatch_size, hatch_size / 2.0);
cairo_line_to (ct2, hatch_size / 2.0, hatch_size);
cairo_stroke (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_cross_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
double line_width = gdip_hatch_get_line_width (hbr);
double dash [] = {1.0}; /* used for drawing dotted grid */
BOOL dotted = (hbr->hatchStyle == HatchStyleDottedGrid);
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, dotted ? CAIRO_LINE_CAP_BUTT : CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_size, hatch_size);
/* draw lines in the foregound */
set_color (ct2, hbr->foreColor);
cairo_set_line_width (ct2, line_width);
if (hbr->hatchStyle == HatchStyleDottedGrid)
cairo_set_dash (ct2, dash, 1, 0);
/* draw a horizontal line */
cairo_move_to (ct2, CAIRO_AA_OFFSET_X, hatch_size / 2.0 + CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_size + CAIRO_AA_OFFSET_X, hatch_size / 2.0 + CAIRO_AA_OFFSET_Y);
/* draw a vertical line */
cairo_move_to (ct2, hatch_size / 2.0 + CAIRO_AA_OFFSET_X, CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_size / 2.0 + CAIRO_AA_OFFSET_X, hatch_size + CAIRO_AA_OFFSET_Y);
cairo_stroke (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_diagonal_cross_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
double line_width = gdip_hatch_get_line_width (hbr);
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, TRUE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_size, hatch_size);
/* draw diagonal lines in the foreground */
set_color (ct2, hbr->foreColor);
cairo_set_line_width (ct2, line_width);
/* draw a forward diagonal line */
cairo_move_to (ct2, 0, 0);
cairo_line_to (ct2, hatch_size, hatch_size);
/* draw a backward diagonal line */
cairo_move_to (ct2, hatch_size, 0);
cairo_line_to (ct2, 0, hatch_size);
cairo_stroke (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_percent_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_wd = gdip_hatch_get_width (hbr);
double hatch_ht = gdip_hatch_get_height (hbr);
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* some patterns requires to reverse the colors */
switch (hbr->hatchStyle) {
case HatchStyle05Percent:
case HatchStyle10Percent:
case HatchStyle20Percent:
case HatchStyle25Percent:
draw_background (ct2, hbr->backColor, hatch_wd, hatch_ht);
set_color (ct2, hbr->foreColor);
break;
default:
draw_background (ct2, hbr->foreColor, hatch_wd, hatch_ht);
set_color (ct2, hbr->backColor);
}
/* draw four dots */
/* left middle */
gdip_cairo_pixel (ct2, 0, hatch_ht / 2.0);
/* top middle */
gdip_cairo_pixel (ct2, hatch_wd / 2.0, 0);
/* bottom middle */
gdip_cairo_pixel (ct2, hatch_wd / 2.0, hatch_ht);
/* right middle */
gdip_cairo_pixel (ct2, hatch_wd, hatch_ht / 2.0);
cairo_fill (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_30_percent_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
double line_width = gdip_hatch_get_line_width (hbr);
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* HatchStyle30Percent and HatchStyle60Percent are identical, but the colors are reversed */
if (hbr->hatchStyle == HatchStyle60Percent) {
draw_background (ct2, hbr->foreColor, hatch_size, hatch_size);
set_color (ct2, hbr->backColor);
} else {
draw_background (ct2, hbr->backColor, hatch_size, hatch_size);
set_color (ct2, hbr->foreColor);
}
/* draw two diagonal lines in the foreground */
cairo_set_line_width (ct2, line_width);
/* near top left corner */
cairo_move_to (ct2, CAIRO_AA_OFFSET_X, CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_size + CAIRO_AA_OFFSET_X, hatch_size + CAIRO_AA_OFFSET_Y);
/* near top right corner */
cairo_move_to (ct2, hatch_size + CAIRO_AA_OFFSET_X, CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, CAIRO_AA_OFFSET_X, hatch_size + CAIRO_AA_OFFSET_Y);
cairo_stroke (ct2);
/* simulate the dots by drawing lines in background color */
if (hbr->hatchStyle == HatchStyleDottedDiamond) {
double i;
set_color (ct2, hbr->backColor);
for (i = 0.0; i <= hatch_size; i += 2.0) {
cairo_move_to (ct2, i, 0.0);
cairo_line_to (ct2, i, hatch_size);
}
cairo_stroke (ct2);
}
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_40_percent_hatch (cairo_t *ct, cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
cairo_pattern_t *pattern;
cairo_t *ct2;
double temp_size = 2;
/* calculate radius using, pi * square (r) = % of hatch area */
double rad = sqrt ((10.0 * hatch_size * hatch_size) / (2 * PI * 100.0));
cairo_surface_t *temp = cairo_surface_create_similar (cairo_get_target (ct),
CAIRO_CONTENT_COLOR_ALPHA, temp_size, temp_size);
if (cairo_surface_status (temp) != CAIRO_STATUS_SUCCESS) {
cairo_surface_destroy (temp);
return CAIRO_STATUS_NO_MEMORY;
}
/* draw a 50% hatch */
ct2 = create_hatch_context (temp, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL) {
cairo_surface_destroy (temp);
return CAIRO_STATUS_NO_MEMORY;
}
/* draw background */
draw_background (ct2, hbr->backColor, temp_size, temp_size);
/* draw two diagonal lines in the foreground */
set_color (ct2, hbr->foreColor);
cairo_rectangle (ct2, 0, 0, temp_size / 2.0, temp_size / 2.0);
cairo_rectangle (ct2, temp_size / 2.0, temp_size / 2.0, temp_size, temp_size);
cairo_fill (ct2);
/* set the pattern for the consequent fill or stroke */
pattern = cairo_pattern_create_for_surface (temp);
if (cairo_pattern_status (pattern) != CAIRO_STATUS_SUCCESS) {
cairo_surface_destroy (temp);
cairo_destroy (ct2);
cairo_pattern_destroy (pattern);
return CAIRO_STATUS_NO_MEMORY;
}
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
/* Clean up 50% */
cairo_surface_destroy (temp);
cairo_destroy (ct2);
/* temp hatch is used as background, so we get 50% hatch */
ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL) {
cairo_pattern_destroy (pattern);
return CAIRO_STATUS_NO_MEMORY;
}
cairo_set_source (ct2, pattern);
cairo_rectangle (ct2, 0, 0, hatch_size, hatch_size);
cairo_fill (ct2);
/* foreground is filled with 10% hatch of background color */
set_color (ct2, hbr->backColor);
/* 0.5 is added for pixel adjustment. It's ugly but it makes output better. */
/* draw four semi circles in the foregound to make dots */
/* left middle */
cairo_arc (ct2, 0, hatch_size / 2.0, rad, - PI / 2.0, PI / 2.0);
cairo_fill (ct2);
/* top middle */
cairo_arc (ct2, hatch_size / 2.0, 0, rad, 0, PI);
cairo_fill (ct2);
/* bottom middle */
cairo_arc (ct2, hatch_size / 2.0, hatch_size, rad, - PI, 0);
cairo_fill (ct2);
/* right middle */
cairo_arc (ct2, hatch_size, hatch_size / 2.0, rad, PI / 2.0, - PI / 2.0);
cairo_fill (ct2);
/* clean up */
cairo_destroy (ct2);
cairo_pattern_destroy (pattern);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_50_percent_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_size, hatch_size);
/* draw two rectangles in the foreground */
set_color (ct2, hbr->foreColor);
cairo_rectangle (ct2, 0, 0, hatch_size / 2.0, hatch_size / 2.0);
cairo_rectangle (ct2, hatch_size / 2.0, hatch_size / 2.0, hatch_size, hatch_size);
cairo_fill (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_downward_diagonal_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
double line_width = gdip_hatch_get_line_width (hbr);
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_size, hatch_size);
/* draw diagonal line in the foreground */
set_color (ct2, hbr->foreColor);
cairo_set_line_width (ct2, line_width);
cairo_move_to (ct2, CAIRO_AA_OFFSET_X, hatch_size / 2.0 + CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_size / 2.0 + CAIRO_AA_OFFSET_X, hatch_size + CAIRO_AA_OFFSET_Y);
cairo_move_to (ct2, hatch_size / 2.0 + CAIRO_AA_OFFSET_X, CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_size + CAIRO_AA_OFFSET_X, hatch_size / 2.0 + CAIRO_AA_OFFSET_Y);
cairo_stroke (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_dark_diagonal_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_size, hatch_size);
/* draw diagonal line in the foreground */
set_color (ct2, hbr->foreColor);
if (hbr->hatchStyle == HatchStyleDarkDownwardDiagonal) {
cairo_rectangle (ct2, 0, 0, 2, 1);
cairo_rectangle (ct2, 1, 1, 2, 1);
cairo_rectangle (ct2, 2, 2, 2, 1);
cairo_rectangle (ct2, 0, 3, 1, 1);
cairo_rectangle (ct2, 3, 3, 1, 1);
} else {
cairo_rectangle (ct2, 1, 3, 2, 1);
cairo_rectangle (ct2, 2, 2, 2, 1);
cairo_rectangle (ct2, 3, 1, 1, 1);
cairo_rectangle (ct2, 0, 1, 1, 1);
cairo_rectangle (ct2, 0, 0, 2, 1);
}
cairo_fill (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_upward_diagonal_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
double line_width = gdip_hatch_get_line_width (hbr);
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_size, hatch_size);
/* draw diagonal line in the foreground */
set_color (ct2, hbr->foreColor);
cairo_set_line_width (ct2, line_width);
cairo_move_to (ct2, hatch_size / 2.0 + CAIRO_AA_OFFSET_X, CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, CAIRO_AA_OFFSET_X, hatch_size / 2.0 + CAIRO_AA_OFFSET_Y);
cairo_move_to (ct2, hatch_size + CAIRO_AA_OFFSET_X, hatch_size / 2.0 + CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_size / 2.0 + CAIRO_AA_OFFSET_X, hatch_size + CAIRO_AA_OFFSET_Y);
cairo_stroke (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_dashed_diagonal_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_wd = gdip_hatch_get_width (hbr);
double hatch_ht = gdip_hatch_get_height (hbr);
double line_width = gdip_hatch_get_line_width (hbr);
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_wd, hatch_ht);
/* draw slant line in the foreground */
set_color (ct2, hbr->foreColor);
cairo_set_line_width (ct2, line_width);
if (hbr->hatchStyle == HatchStyleDashedUpwardDiagonal) {
/* 45 deg slant line */
cairo_move_to (ct2, hatch_wd + CAIRO_AA_OFFSET_X, CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, CAIRO_AA_OFFSET_X, hatch_wd + CAIRO_AA_OFFSET_Y);
} else { /* HatchStyleDashedDownwardDiagonal */
/* -45 deg slant line */
cairo_move_to (ct2, CAIRO_AA_OFFSET_X, CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_wd, hatch_wd - CAIRO_AA_OFFSET_Y);
}
cairo_stroke (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_dashed_horizontal_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_wd = gdip_hatch_get_width (hbr);
double hatch_ht = gdip_hatch_get_height (hbr);
double line_width = gdip_hatch_get_line_width (hbr);
double line_space = 4;
double dash_len = 4;
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_wd, hatch_ht);
/* draw horizontal lines in the foreground */
set_color (ct2, hbr->foreColor);
cairo_set_line_width (ct2, line_width);
/* upper left dash */
cairo_move_to (ct2, 0, line_space / 2 + CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, dash_len, line_space / 2 + CAIRO_AA_OFFSET_Y);
/* lower right dash */
cairo_move_to (ct2, hatch_wd - dash_len + CAIRO_AA_OFFSET_X, hatch_ht - line_space / 2 + CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_wd, hatch_ht - line_space / 2 + CAIRO_AA_OFFSET_Y);
cairo_stroke (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_dashed_vertical_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_wd = gdip_hatch_get_width (hbr);
double hatch_ht = gdip_hatch_get_height (hbr);
double line_width = gdip_hatch_get_line_width (hbr);
double line_space = 4;
double dash_len = 4;
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_wd, hatch_ht);
/* draw vertical lines in the foreground */
set_color (ct2, hbr->foreColor);
cairo_set_line_width (ct2, line_width);
/* upper left dash */
cairo_move_to (ct2, line_space / 2 + CAIRO_AA_OFFSET_X, 0);
cairo_line_to (ct2, line_space / 2 + CAIRO_AA_OFFSET_X, dash_len - CAIRO_AA_OFFSET_Y);
/* lower right dash */
cairo_move_to (ct2, hatch_wd - line_space / 2 + CAIRO_AA_OFFSET_X, hatch_ht - dash_len + CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_wd - line_space / 2 + CAIRO_AA_OFFSET_X, hatch_ht);
cairo_stroke (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_confetti_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
double confetti_size = (hbr->hatchStyle == HatchStyleLargeConfetti) ? 1.5 : 1.0;
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_size, hatch_size);
/* draw small rectangles in the foreground */
set_color (ct2, hbr->foreColor);
/* draw four rectangles on the left reversed 'L' shape */
cairo_rectangle (ct2, 0, 0, confetti_size, confetti_size);
cairo_rectangle (ct2, hatch_size / 8.0, hatch_size / 4.0, confetti_size, confetti_size);
cairo_rectangle (ct2, 3 * hatch_size / 8.0, hatch_size / 2.0, confetti_size, confetti_size);
cairo_rectangle (ct2, hatch_size / 4.0, 3 * hatch_size / 4.0, confetti_size, confetti_size);
/* draw four rectangles on the other left reversed 'L' shape */
cairo_rectangle (ct2, hatch_size / 2.0, hatch_size / 8.0, confetti_size, confetti_size);
cairo_rectangle (ct2, 3 * hatch_size / 4.0, 3 * hatch_size / 8.0, confetti_size, confetti_size);
cairo_rectangle (ct2, 7 * hatch_size / 8.0, 5 * hatch_size / 8.0, confetti_size, confetti_size);
cairo_rectangle (ct2, 5 * hatch_size / 8.0, 7 * hatch_size / 8.0, confetti_size, confetti_size);
cairo_fill (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_zigzag_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
double line_width = gdip_hatch_get_line_width (hbr);
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_size, hatch_size);
set_color (ct2, hbr->foreColor);
/* draw two diagonal lines in the foreground */
cairo_set_line_width (ct2, line_width);
/* first half*/
cairo_move_to (ct2, CAIRO_AA_OFFSET_X, CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_size + CAIRO_AA_OFFSET_X, hatch_size + CAIRO_AA_OFFSET_Y);
/* second half */
cairo_move_to (ct2, hatch_size - 1 + CAIRO_AA_OFFSET_X, CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, 1 - CAIRO_AA_OFFSET_X, hatch_size + CAIRO_AA_OFFSET_Y);
cairo_stroke (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_wave_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_wd = gdip_hatch_get_width (hbr);
double hatch_ht = gdip_hatch_get_height (hbr);
double line_width = gdip_hatch_get_line_width (hbr);
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_wd, hatch_ht);
/* set foreground */
set_color (ct2, hbr->foreColor);
cairo_set_line_width (ct2, line_width);
/* draw a horizontal 'S' shape */
cairo_move_to (ct2, 1.0 + CAIRO_AA_OFFSET_X, 1.0 + CAIRO_AA_OFFSET_Y);
cairo_curve_to (ct2, 1.0 + CAIRO_AA_OFFSET_X, 1.0 + CAIRO_AA_OFFSET_Y, hatch_wd / 4.0 + CAIRO_AA_OFFSET_X, hatch_ht + CAIRO_AA_OFFSET_Y, hatch_wd / 2.0 + CAIRO_AA_OFFSET_X, hatch_ht / 2.0 + CAIRO_AA_OFFSET_Y);
cairo_curve_to (ct2, hatch_wd / 2.0 + CAIRO_AA_OFFSET_X, hatch_ht / 2.0 + CAIRO_AA_OFFSET_Y, 3 * hatch_wd / 4.0 + CAIRO_AA_OFFSET_X, CAIRO_AA_OFFSET_Y, hatch_wd - 1.0 + CAIRO_AA_OFFSET_X, hatch_ht - 1.0 + CAIRO_AA_OFFSET_Y);
cairo_stroke (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_diagonal_brick_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
double line_width = gdip_hatch_get_line_width (hbr);
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_size, hatch_size);
/* set foreground */
set_color (ct2, hbr->foreColor);
cairo_set_line_width (ct2, line_width);
/* draw one full diagonal line and half of another diagonal line */
gdip_cairo_pixel (ct2, 0, 0);
cairo_fill (ct2);
cairo_move_to (ct2, CAIRO_AA_OFFSET_X, hatch_size + CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_size + CAIRO_AA_OFFSET_X, CAIRO_AA_OFFSET_Y);
cairo_move_to (ct2, hatch_size / 2.0 + CAIRO_AA_OFFSET_X, hatch_size / 2.0 + CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_size + CAIRO_AA_OFFSET_X, hatch_size + CAIRO_AA_OFFSET_Y);
cairo_stroke (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_horizontal_brick_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
double line_width = gdip_hatch_get_line_width (hbr);
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_size, hatch_size);
/* set foreground */
set_color (ct2, hbr->foreColor);
cairo_set_line_width (ct2, line_width);
/* draw a 'C' shape */
cairo_move_to (ct2, hatch_size + CAIRO_AA_OFFSET_X, CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, CAIRO_AA_OFFSET_X, CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, CAIRO_AA_OFFSET_X, hatch_size / 2.0 + CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_size + CAIRO_AA_OFFSET_X, hatch_size / 2.0 + CAIRO_AA_OFFSET_Y);
/* draw lower connector */
cairo_move_to (ct2, hatch_size / 2.0 + CAIRO_AA_OFFSET_X, hatch_size / 2.0 + CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_size / 2.0 + CAIRO_AA_OFFSET_X, hatch_size + CAIRO_AA_OFFSET_Y);
cairo_stroke (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_weave_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
double line_width = gdip_hatch_get_line_width (hbr);
double dash [] = {0.5};
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_size, hatch_size);
/* set foreground */
set_color (ct2, hbr->foreColor);
cairo_set_line_width (ct2, line_width);
cairo_set_dash (ct2, dash, 1, 0);
/* draw a reversed 'C' shape diagonally with one connector towards
* one of the other two vertices of the square and three connectors
* towards the fourth vertex.
*/
cairo_move_to (ct2, CAIRO_AA_OFFSET_X, hatch_size / 2.0 + CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_size / 2.0 + CAIRO_AA_OFFSET_X, CAIRO_AA_OFFSET_Y);
/* this makes up one of the lower connectors also */
cairo_line_to (ct2, hatch_size + CAIRO_AA_OFFSET_X, hatch_size / 2.0 + CAIRO_AA_OFFSET_Y);
/* complete the diagonal 'C' shape */
cairo_move_to (ct2, 3 * hatch_size / 4.0 + CAIRO_AA_OFFSET_X, hatch_size / 4.0 + CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, CAIRO_AA_OFFSET_X, hatch_size + CAIRO_AA_OFFSET_Y);
/* draw one upper connector */
cairo_move_to (ct2, CAIRO_AA_OFFSET_X, CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_size / 4.0 + CAIRO_AA_OFFSET_X, hatch_size / 4.0 + CAIRO_AA_OFFSET_Y);
/* draw lower connectors */
cairo_move_to (ct2, hatch_size / 4.0 + CAIRO_AA_OFFSET_X, 3 * hatch_size / 4.0 + CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_size / 2.0 + CAIRO_AA_OFFSET_X, hatch_size + CAIRO_AA_OFFSET_Y);
cairo_move_to (ct2, hatch_size + CAIRO_AA_OFFSET_X, hatch_size + CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_size / 2.0 + CAIRO_AA_OFFSET_X, hatch_size / 2.0 + CAIRO_AA_OFFSET_Y);
cairo_stroke (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_plaid_hatch (cairo_t *ct, cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
double temp_size = 2;
cairo_t *ct2;
cairo_pattern_t *pattern;
/* draw one hatch that has 50% of area as 50% hatch and remaining area
* equally covered by each of foreground and background colors.
*/
cairo_surface_t *temp = cairo_surface_create_similar (cairo_get_target (ct),
CAIRO_CONTENT_COLOR_ALPHA, temp_size, temp_size);
if (cairo_surface_status (temp) != CAIRO_STATUS_SUCCESS) {
cairo_surface_destroy (temp);
return CAIRO_STATUS_NO_MEMORY;
}
/* draw a 50% hatch */
ct2 = create_hatch_context (temp, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL) {
cairo_surface_destroy (temp);
return CAIRO_STATUS_NO_MEMORY;
}
/* draw background */
draw_background (ct2, hbr->backColor, temp_size, temp_size);
/* draw two diagonal lines in the foreground */
set_color (ct2, hbr->foreColor);
cairo_rectangle (ct2, 0, 0, temp_size / 2.0, temp_size / 2.0);
cairo_rectangle (ct2, temp_size / 2.0, temp_size / 2.0, temp_size, temp_size);
cairo_fill (ct2);
/* create the pattern for the consequent fill or stroke */
pattern = cairo_pattern_create_for_surface (temp);
if (cairo_pattern_status (pattern) != CAIRO_STATUS_SUCCESS) {
cairo_surface_destroy (temp);
cairo_destroy (ct2);
cairo_pattern_destroy (pattern);
return CAIRO_STATUS_NO_MEMORY;
}
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
/* Clean up the 50% objects */
cairo_surface_destroy (temp);
cairo_destroy (ct2);
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL) {
cairo_pattern_destroy (pattern);
return CAIRO_STATUS_NO_MEMORY;
}
/* temp hatch is used to fill 50% of area */
cairo_set_source(ct2, pattern);
cairo_rectangle (ct2, 0, 0, hatch_size, hatch_size / 2.0);
cairo_fill (ct2);
/* draw two rectangle in the foregound to make up 50% of plaid */
/* foreground is filled with 25% of background color and 25% of foreground color */
set_color (ct2, hbr->foreColor);
cairo_rectangle (ct2, 0, hatch_size / 2.0, hatch_size / 2.0, hatch_size / 2.0);
cairo_fill (ct2);
set_color (ct2, hbr->backColor);
cairo_rectangle (ct2, hatch_size / 2.0, hatch_size / 2.0, hatch_size / 2.0, hatch_size / 2.0);
cairo_fill (ct2);
/* clean up */
cairo_destroy (ct2);
cairo_pattern_destroy (pattern);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_divot_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
double line_width = gdip_hatch_get_line_width (hbr);
double x, y;
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_size, hatch_size);
/* set foreground */
set_color (ct2, hbr->foreColor);
cairo_set_line_width (ct2, line_width);
/* draw two angle brackets in the foreground */
x = hatch_size / 8.0 + CAIRO_AA_OFFSET_X;
y = hatch_size / 8.0 + CAIRO_AA_OFFSET_Y;
gdip_cairo_pixel (ct2, x, y);
gdip_cairo_pixel (ct2, x + 1, y + 1);
gdip_cairo_pixel (ct2, x, y + 2);
x += 5;
y += 6;
gdip_cairo_pixel (ct2, x, y);
gdip_cairo_pixel (ct2, x - 1, y - 1);
gdip_cairo_pixel (ct2, x, y - 2);
cairo_fill (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_solid_diamond_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_wd = gdip_hatch_get_width (hbr);
double hatch_ht = gdip_hatch_get_height (hbr);
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_BUTT, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_wd, hatch_ht);
/* draw two triangles in the foreground with left and right sides as their bases */
set_color (ct2, hbr->foreColor);
/* draw left triangle */
cairo_move_to (ct2, -0.5, 0.5);
cairo_line_to (ct2, hatch_wd / 2.0 - 0.5, hatch_ht / 2.0 + CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, 0, hatch_ht);
cairo_close_path (ct2);
cairo_fill (ct2);
/* draw right triangle */
cairo_move_to (ct2, hatch_wd, 0.5);
cairo_line_to (ct2, hatch_wd / 2.0 + 0.5, hatch_ht / 2.0);
cairo_line_to (ct2, hatch_wd, hatch_ht);
cairo_close_path (ct2);
cairo_fill (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_shingle_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
double line_width = gdip_hatch_get_line_width (hbr);
double dash [] = {1.0};
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* draw background */
draw_background (ct2, hbr->backColor, hatch_size, hatch_size);
/* draw two curves in the foreground */
set_color (ct2, hbr->foreColor);
cairo_set_dash (ct2, dash, 1, 0);
cairo_set_line_width (ct2, line_width);
/* draw a curve thru left top, center and right top corners */
cairo_move_to (ct2, CAIRO_AA_OFFSET_X, CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_size / 4.0 + CAIRO_AA_OFFSET_X, hatch_size / 4.0 + CAIRO_AA_OFFSET_Y);
cairo_curve_to (ct2, hatch_size / 4.0 + CAIRO_AA_OFFSET_X, hatch_size / 4.0 + CAIRO_AA_OFFSET_Y, hatch_size / 2.0 + CAIRO_AA_OFFSET_X, hatch_size / 2.0 + CAIRO_AA_OFFSET_Y, 3 * hatch_size / 4.0 + CAIRO_AA_OFFSET_X, hatch_size / 4.0 + CAIRO_AA_OFFSET_Y);
cairo_line_to (ct2, hatch_size + CAIRO_AA_OFFSET_X, CAIRO_AA_OFFSET_Y);
/* draw a quarter circle thru center and right bottom corner */
cairo_arc (ct2, CAIRO_AA_OFFSET_X, hatch_size + CAIRO_AA_OFFSET_Y, hatch_size, -PI/4.0, 0);
cairo_stroke (ct2);
/* clean up */
cairo_destroy (ct2);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
draw_trellis_hatch (cairo_surface_t *hatch, GpHatch *hbr)
{
double hatch_size = gdip_hatch_get_width (hbr);
/* hatch is not supposed to be affected by user matrix (so we create a new context) */
cairo_t *ct2 = create_hatch_context (hatch, CAIRO_LINE_CAP_SQUARE, FALSE);
if (ct2 == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* note: we swap the colors (easier to draw this way) */
/* draw background */
draw_background (ct2, hbr->foreColor, hatch_size, hatch_size);
/* draw rectangles in the foreground */
set_color (ct2, hbr->backColor);
/* upper left rectangle */
cairo_rectangle (ct2,0, hatch_size / 4.0, hatch_size / 2.0, hatch_size / 4.0);
/* lower right rectangle */
cairo_rectangle (ct2, hatch_size / 2.0, 3 * hatch_size / 4.0, hatch_size / 2.0, hatch_size / 4.0);
cairo_fill (ct2);
/* clean up */