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-rw-r--r--src/cairo/cdcairo.c1758
1 files changed, 1758 insertions, 0 deletions
diff --git a/src/cairo/cdcairo.c b/src/cairo/cdcairo.c
new file mode 100644
index 0000000..34fdef7
--- /dev/null
+++ b/src/cairo/cdcairo.c
@@ -0,0 +1,1758 @@
+/** \file
+* \brief Cairo Base Driver
+*
+* See Copyright Notice in cd.h
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <string.h>
+#include <math.h>
+
+#include <glib.h>
+
+#include "cdcairoctx.h"
+
+#define HATCH_WIDTH 8
+#define HATCH_HEIGHT 8
+
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
+
+static int StrIsAscii(const char* str)
+{
+ while(*str)
+ {
+ int c = *str;
+ if (c < 0)
+ return 0;
+ str++;
+ }
+ return 1;
+}
+
+static char* StrToUTF8(const char *str, const char* charset, int length)
+{
+ return g_convert(str, length, "UTF-8", charset, NULL, NULL, NULL);
+}
+
+char* StrConvertToUTF8(cdCtxCanvas *ctxcanvas, const char* str, int length)
+{
+ const char *charset = NULL;
+
+ if (!str || *str == 0)
+ return (char*)str;
+
+ if (g_get_charset(&charset)) /* current locale is already UTF-8 */
+ {
+ if (g_utf8_validate(str, -1, NULL))
+ {
+ return (char*)str;
+ }
+ else
+ {
+ ctxcanvas->cairoLastConvertUTF8 = StrToUTF8(str, "ISO8859-1", length); /* if string is not UTF-8, assume ISO8859-1 */
+
+ if (!ctxcanvas->cairoLastConvertUTF8)
+ return (char*)str;
+
+ return ctxcanvas->cairoLastConvertUTF8;
+ }
+ }
+ else
+ {
+ if (StrIsAscii(str) || !charset)
+ {
+ return (char*)str;
+ }
+ else if (charset)
+ {
+ ctxcanvas->cairoLastConvertUTF8 = StrToUTF8(str, charset, length);
+
+ if (!ctxcanvas->cairoLastConvertUTF8)
+ return (char*)str;
+
+ return ctxcanvas->cairoLastConvertUTF8;
+ }
+ }
+
+ return (char*)str;
+}
+
+static void update_fill(cdCtxCanvas *ctxcanvas, int fill)
+{
+ if (fill == 0 || ctxcanvas->canvas->interior_style == CD_SOLID)
+ {
+ if (ctxcanvas->last_source == 0)
+ return;
+
+ cairo_set_source(ctxcanvas->cr, ctxcanvas->solid);
+ ctxcanvas->last_source = 0;
+ }
+ else
+ {
+ if (ctxcanvas->last_source == 1)
+ return;
+
+ cairo_set_source(ctxcanvas->cr, ctxcanvas->pattern);
+ ctxcanvas->last_source = 1;
+ }
+}
+
+/******************************************************/
+
+void cdcairoKillCanvas(cdCtxCanvas *ctxcanvas)
+{
+ if (ctxcanvas->solid)
+ cairo_pattern_destroy(ctxcanvas->solid);
+
+ if (ctxcanvas->pattern)
+ cairo_pattern_destroy(ctxcanvas->pattern);
+
+ if (ctxcanvas->font)
+ cairo_scaled_font_destroy(ctxcanvas->font);
+
+ if (ctxcanvas->cairoLastConvertUTF8)
+ g_free(ctxcanvas->cairoLastConvertUTF8);
+
+ cairo_destroy(ctxcanvas->cr);
+
+ memset(ctxcanvas, 0, sizeof(cdCtxCanvas));
+ free(ctxcanvas);
+}
+
+/******************************************************/
+
+static void cdflush(cdCtxCanvas *ctxcanvas)
+{
+ cairo_show_page(ctxcanvas->cr);
+}
+
+/******************************************************/
+
+static void setcliprect(cdCtxCanvas* ctxcanvas, double xmin, double ymin, double xmax, double ymax)
+{
+ cairo_reset_clip(ctxcanvas->cr);
+ cairo_rectangle(ctxcanvas->cr, xmin, ymin, xmax-xmin+1, ymax-ymin+1);
+ cairo_clip(ctxcanvas->cr);
+}
+
+static void cdcliparea(cdCtxCanvas *ctxcanvas, int xmin, int xmax, int ymin, int ymax)
+{
+ if (ctxcanvas->canvas->clip_mode != CD_CLIPAREA)
+ return;
+
+ setcliprect(ctxcanvas, (double)xmin, (double)ymin, (double)xmax, (double)ymax);
+}
+
+static int cdclip(cdCtxCanvas *ctxcanvas, int mode)
+{
+ switch (mode)
+ {
+ case CD_CLIPOFF:
+ cairo_reset_clip(ctxcanvas->cr);
+ break;
+ case CD_CLIPAREA:
+ ctxcanvas->canvas->clip_mode = CD_CLIPAREA;
+ setcliprect(ctxcanvas, (double)ctxcanvas->canvas->clip_rect.xmin,
+ (double)ctxcanvas->canvas->clip_rect.ymin,
+ (double)ctxcanvas->canvas->clip_rect.xmax,
+ (double)ctxcanvas->canvas->clip_rect.ymax);
+ break;
+ case CD_CLIPPOLYGON:
+ {
+ int hole_index = 0;
+ int i;
+ cairo_reset_clip(ctxcanvas->cr);
+
+ if (ctxcanvas->canvas->clip_poly)
+ {
+ cdPoint *poly = ctxcanvas->canvas->clip_poly;
+ cairo_move_to(ctxcanvas->cr, poly[0].x, poly[0].y);
+ for (i=1; i<ctxcanvas->canvas->clip_poly_n; i++)
+ {
+ if (ctxcanvas->holes && i == ctxcanvas->poly_holes[hole_index])
+ {
+ cairo_move_to(ctxcanvas->cr, poly[i].x, poly[i].y);
+ hole_index++;
+ }
+ else
+ cairo_line_to(ctxcanvas->cr, poly[i].x, poly[i].y);
+ }
+ }
+ else if (ctxcanvas->canvas->clip_fpoly)
+ {
+ cdfPoint *poly = ctxcanvas->canvas->clip_fpoly;
+ cairo_move_to(ctxcanvas->cr, poly[0].x, poly[0].y);
+ for (i=1; i<ctxcanvas->canvas->clip_poly_n; i++)
+ {
+ if (ctxcanvas->holes && i == ctxcanvas->poly_holes[hole_index])
+ {
+ cairo_move_to(ctxcanvas->cr, poly[i].x, poly[i].y);
+ hole_index++;
+ }
+ else
+ cairo_line_to(ctxcanvas->cr, poly[i].x, poly[i].y);
+ }
+ }
+ cairo_clip(ctxcanvas->cr);
+ break;
+ }
+ case CD_CLIPREGION:
+ break;
+ }
+
+ return mode;
+}
+
+/******************************************************/
+
+static void make_pattern(cdCtxCanvas *ctxcanvas, int n, int m, void* data, int (*data2rgb)(cdCtxCanvas *ctxcanvas, int n, int i, int j, void* data, unsigned char*r, unsigned char*g, unsigned char*b, unsigned char*a))
+{
+ int i, j;
+ unsigned char r, g, b, a;
+ cairo_surface_t* pattern_surface;
+ cairo_t* cr;
+
+ pattern_surface = cairo_surface_create_similar(cairo_get_target(ctxcanvas->cr), CAIRO_CONTENT_COLOR_ALPHA, n, m);
+
+ cr = cairo_create(pattern_surface);
+
+ for (j = 0; j < m; j++)
+ {
+ for (i = 0; i < n; i++)
+ {
+ int ret = data2rgb(ctxcanvas, n, i, j, data, &r, &g, &b, &a);
+ if (ret == -1)
+ continue;
+
+ cairo_set_source_rgba(cr, (double)r/255.0, (double)g/255.0, (double)b/255.0, (double)a/255.0);
+
+ cairo_rectangle(cr, i, m-1-j, 1.0, 1.0);
+ cairo_fill(cr);
+ }
+ }
+
+ if (ctxcanvas->pattern)
+ cairo_pattern_destroy(ctxcanvas->pattern);
+
+ ctxcanvas->pattern = cairo_pattern_create_for_surface(pattern_surface);
+ cairo_pattern_set_extend(ctxcanvas->pattern, CAIRO_EXTEND_REPEAT);
+
+ cairo_surface_destroy(pattern_surface);
+ cairo_destroy(cr);
+}
+
+static int long2rgb(cdCtxCanvas *ctxcanvas, int n, int i, int j, void* data, unsigned char*r, unsigned char*g, unsigned char*b, unsigned char*a)
+{
+ long* long_data = (long*)data;
+ long c = long_data[j*n+i];
+ (void)ctxcanvas;
+ cdDecodeColor(c, r, g, b);
+ *a = cdDecodeAlpha(c);
+ return 1;
+}
+
+static void cdpattern(cdCtxCanvas *ctxcanvas, int n, int m, const long int *pattern)
+{
+ make_pattern(ctxcanvas, n, m, (void*)pattern, long2rgb);
+ cairo_set_source(ctxcanvas->cr, ctxcanvas->pattern);
+ ctxcanvas->last_source = 1;
+}
+
+static int uchar2rgb(cdCtxCanvas *ctxcanvas, int n, int i, int j, void* data, unsigned char*r, unsigned char*g, unsigned char*b, unsigned char*a)
+{
+ unsigned char* uchar_data = (unsigned char*)data;
+ if (uchar_data[j*n+i])
+ {
+ cdDecodeColor(ctxcanvas->canvas->foreground, r, g, b);
+ *a = cdDecodeAlpha(ctxcanvas->canvas->foreground);
+ }
+ else
+ {
+ if (ctxcanvas->canvas->back_opacity == CD_TRANSPARENT)
+ return -1;
+ else
+ {
+ cdDecodeColor(ctxcanvas->canvas->background, r, g, b);
+ *a = cdDecodeAlpha(ctxcanvas->canvas->background);
+ }
+ }
+
+ return 1;
+}
+
+static void cdstipple(cdCtxCanvas *ctxcanvas, int n, int m, const unsigned char *stipple)
+{
+ make_pattern(ctxcanvas, n, m, (void*)stipple, uchar2rgb);
+ cairo_set_source(ctxcanvas->cr, ctxcanvas->pattern);
+ ctxcanvas->last_source = 1;
+}
+
+static int cdhatch(cdCtxCanvas *ctxcanvas, int style)
+{
+ int hsize = HATCH_WIDTH - 1;
+ int hhalf = hsize / 2;
+ cairo_surface_t* hatch_surface;
+ cairo_t* cr;
+
+ hatch_surface = cairo_surface_create_similar(cairo_get_target(ctxcanvas->cr), CAIRO_CONTENT_COLOR_ALPHA, HATCH_WIDTH, HATCH_HEIGHT);
+
+ cr = cairo_create(hatch_surface);
+
+ if (ctxcanvas->canvas->back_opacity == CD_OPAQUE)
+ {
+ cairo_set_source_rgba(cr, cdCairoGetRed(ctxcanvas->canvas->background), cdCairoGetGreen(ctxcanvas->canvas->background), cdCairoGetBlue(ctxcanvas->canvas->background), cdCairoGetAlpha(ctxcanvas->canvas->background));
+ cairo_rectangle(cr, 0, 0, hsize, hsize);
+ cairo_fill(cr);
+ }
+
+ cairo_set_source_rgba(cr, cdCairoGetRed(ctxcanvas->canvas->foreground), cdCairoGetGreen(ctxcanvas->canvas->foreground), cdCairoGetBlue(ctxcanvas->canvas->foreground), cdCairoGetAlpha(ctxcanvas->canvas->foreground));
+
+ switch(style)
+ {
+ case CD_HORIZONTAL:
+ cairo_move_to(cr, 0.0, (double)hhalf);
+ cairo_line_to(cr, (double)hsize, (double)hhalf);
+ break;
+ case CD_VERTICAL:
+ cairo_move_to(cr, (double)hhalf, 0.0);
+ cairo_line_to(cr, (double)hhalf, (double)hsize);
+ break;
+ case CD_BDIAGONAL:
+ cairo_move_to(cr, 0.0, (double)hsize);
+ cairo_line_to(cr, (double)hsize, 0.0);
+ break;
+ case CD_FDIAGONAL:
+ cairo_move_to(cr, 0.0, 0.0);
+ cairo_line_to(cr, (double)hsize, (double)hsize);
+ break;
+ case CD_CROSS:
+ cairo_move_to(cr, (double)hsize, 0.0);
+ cairo_line_to(cr, (double)hsize, (double)hsize);
+ cairo_move_to(cr, 0.0, (double)hhalf);
+ cairo_line_to(cr, (double)hsize, (double)hhalf);
+ break;
+ case CD_DIAGCROSS:
+ cairo_move_to(cr, 0.0, 0.0);
+ cairo_line_to(cr, (double)hsize, (double)hsize);
+ cairo_move_to(cr, (double)hsize, 0.0);
+ cairo_line_to(cr, 0.0, (double)hsize);
+ break;
+ }
+
+ cairo_stroke(cr);
+
+ if (ctxcanvas->pattern)
+ cairo_pattern_destroy(ctxcanvas->pattern);
+
+ ctxcanvas->pattern = cairo_pattern_create_for_surface(hatch_surface);
+ cairo_pattern_reference(ctxcanvas->pattern);
+ cairo_pattern_set_extend(ctxcanvas->pattern, CAIRO_EXTEND_REPEAT);
+
+ cairo_surface_destroy(hatch_surface);
+ cairo_destroy(cr);
+
+ cairo_set_source(ctxcanvas->cr, ctxcanvas->pattern);
+ ctxcanvas->last_source = 1;
+
+ return style;
+}
+
+/******************************************************/
+/* attributes */
+/******************************************************/
+
+static int cdwritemode(cdCtxCanvas *ctxcanvas, int write_mode)
+{
+ switch (write_mode)
+ {
+ case CD_REPLACE:
+ cairo_set_operator (ctxcanvas->cr, CAIRO_OPERATOR_OVER);
+ break;
+ case CD_XOR:
+ cairo_set_operator (ctxcanvas->cr, CAIRO_OPERATOR_XOR);
+ break;
+ }
+
+ return write_mode;
+}
+
+static int cdinteriorstyle (cdCtxCanvas* ctxcanvas, int style)
+{
+ switch (style)
+ {
+ case CD_SOLID:
+ cairo_set_source(ctxcanvas->cr, ctxcanvas->solid);
+ ctxcanvas->last_source = 0;
+ break;
+ /* must recriate the current pattern */
+ case CD_HATCH:
+ cdhatch(ctxcanvas, ctxcanvas->canvas->hatch_style);
+ break;
+ case CD_STIPPLE:
+ cdstipple(ctxcanvas, ctxcanvas->canvas->stipple_w, ctxcanvas->canvas->stipple_h, ctxcanvas->canvas->stipple);
+ break;
+ case CD_PATTERN:
+ cdpattern(ctxcanvas, ctxcanvas->canvas->pattern_w, ctxcanvas->canvas->pattern_h, ctxcanvas->canvas->pattern);
+ break;
+ }
+
+ return style;
+}
+
+static int cdlinestyle(cdCtxCanvas *ctxcanvas, int style)
+{
+ double dashes[10];
+
+ switch (style)
+ {
+ case CD_CONTINUOUS : /* empty dash */
+ cairo_set_dash(ctxcanvas->cr, 0, 0, 0);
+ break;
+ case CD_DASHED :
+ dashes[0] = 6.0; dashes[1] = 2.0;
+ cairo_set_dash(ctxcanvas->cr, dashes, 2, 0);
+ break;
+ case CD_DOTTED :
+ dashes[0] = 2.0; dashes[1] = 2.0;
+ cairo_set_dash(ctxcanvas->cr, dashes, 2, 0);
+ break;
+ case CD_DASH_DOT :
+ dashes[0] = 6.0; dashes[1] = 2.0;
+ dashes[2] = 2.0; dashes[3] = 2.0;
+ cairo_set_dash(ctxcanvas->cr, dashes, 4, 0);
+ break;
+ case CD_DASH_DOT_DOT :
+ dashes[0] = 6.0; dashes[1] = 2.0;
+ dashes[2] = 2.0; dashes[3] = 2.0;
+ dashes[4] = 2.0; dashes[5] = 2.0;
+ cairo_set_dash(ctxcanvas->cr, dashes, 6, 0);
+ break;
+ case CD_CUSTOM :
+ {
+ int i;
+ double* dash_style = (double*)malloc(sizeof(double)*ctxcanvas->canvas->line_dashes_count);
+
+ for (i = 0; i < ctxcanvas->canvas->line_dashes_count; i++)
+ dash_style[i] = (double)ctxcanvas->canvas->line_dashes[i];
+
+ cairo_set_dash(ctxcanvas->cr, dash_style, ctxcanvas->canvas->line_dashes_count, 0);
+
+ free(dash_style);
+ }
+ break;
+ }
+
+ return style;
+}
+
+static int cdlinewidth(cdCtxCanvas *ctxcanvas, int width)
+{
+ if(width == 0)
+ width = 1;
+
+ cairo_set_line_width(ctxcanvas->cr, (double)width);
+
+ return width;
+}
+
+static int cdlinejoin(cdCtxCanvas *ctxcanvas, int join)
+{
+ int cd2ps_join[] = {CAIRO_LINE_JOIN_MITER, CAIRO_LINE_JOIN_BEVEL, CAIRO_LINE_JOIN_ROUND};
+
+ cairo_set_line_join(ctxcanvas->cr, cd2ps_join[join]);
+
+ return join;
+}
+
+static int cdlinecap(cdCtxCanvas *ctxcanvas, int cap)
+{
+ int cd2pdf_cap[] = {CAIRO_LINE_CAP_BUTT, CAIRO_LINE_CAP_SQUARE, CAIRO_LINE_CAP_ROUND};
+
+ cairo_set_line_cap(ctxcanvas->cr, cd2pdf_cap[cap]);
+
+ return cap;
+}
+
+static int cdfont(cdCtxCanvas *ctxcanvas, const char *typeface, int style, int size)
+{
+ //TODO:pango
+ cairo_scaled_font_t *font;
+ cairo_font_slant_t slant = CAIRO_FONT_SLANT_NORMAL; /* default is */
+ cairo_font_weight_t weight = CAIRO_FONT_WEIGHT_NORMAL; /* CD_PLAIN */
+
+ if (cdStrEqualNoCase(typeface, "Courier") || cdStrEqualNoCase(typeface, "Monospace"))
+ typeface = "Courier New";
+ else if (cdStrEqualNoCase(typeface, "Times") || cdStrEqualNoCase(typeface, "Serif"))
+ typeface = "Times New Roman";
+ else if (cdStrEqualNoCase(typeface, "Helvetica") || cdStrEqualNoCase(typeface, "Sans"))
+ typeface = "Arial";
+
+ /* no support to underline and strikeout */
+ switch(style&3)
+ {
+ case CD_BOLD:
+ weight = CAIRO_FONT_WEIGHT_BOLD;
+ break;
+ case CD_ITALIC:
+ slant = CAIRO_FONT_SLANT_ITALIC;
+ break;
+ case CD_BOLD_ITALIC:
+ weight = CAIRO_FONT_WEIGHT_BOLD;
+ slant = CAIRO_FONT_SLANT_ITALIC;
+ break;
+ }
+
+ cairo_select_font_face(ctxcanvas->cr, typeface, slant, weight);
+ cairo_set_font_size(ctxcanvas->cr, (double)cdGetFontSizePixels(ctxcanvas->canvas, size));
+
+ font = cairo_get_scaled_font(ctxcanvas->cr);
+
+ if (!font)
+ return 0;
+
+ font = cairo_scaled_font_reference(font);
+ ctxcanvas->font = font;
+
+ return 1;
+}
+
+static void cdgetfontdim(cdCtxCanvas *ctxcanvas, int *max_width, int *height, int *ascent, int *descent)
+{
+ cairo_font_extents_t extents;
+
+ if (!ctxcanvas->font)
+ return;
+
+ cairo_set_scaled_font(ctxcanvas->cr, ctxcanvas->font);
+ cairo_font_extents(ctxcanvas->cr, &extents);
+
+ if (ascent) *ascent = (int)extents.ascent;
+ if (descent) *descent = (int)extents.descent;
+ if (height) *height = (int)extents.height;
+ if (max_width) *max_width = (int)extents.max_x_advance;
+}
+
+static long int cdforeground(cdCtxCanvas *ctxcanvas, long int color)
+{
+ if (ctxcanvas->solid)
+ cairo_pattern_destroy(ctxcanvas->solid);
+
+ cairo_set_source_rgba(ctxcanvas->cr, cdCairoGetRed(color),
+ cdCairoGetGreen(color),
+ cdCairoGetBlue(color),
+ cdCairoGetAlpha(color));
+ ctxcanvas->solid = cairo_get_source(ctxcanvas->cr);
+ cairo_pattern_reference(ctxcanvas->solid);
+ ctxcanvas->last_source = 0;
+ return color;
+}
+
+
+/******************************************************/
+
+static void cdclear(cdCtxCanvas* ctxcanvas)
+{
+ cairo_save (ctxcanvas->cr);
+ cairo_set_source_rgba(ctxcanvas->cr, cdCairoGetRed(ctxcanvas->canvas->background), cdCairoGetGreen(ctxcanvas->canvas->background), cdCairoGetBlue(ctxcanvas->canvas->background), cdCairoGetAlpha(ctxcanvas->canvas->background));
+ cairo_set_operator (ctxcanvas->cr, CAIRO_OPERATOR_SOURCE);
+ cairo_paint (ctxcanvas->cr); /* paints the current source everywhere within the current clip region. */
+ cairo_restore (ctxcanvas->cr);
+}
+
+static void cdfline(cdCtxCanvas *ctxcanvas, double x1, double y1, double x2, double y2)
+{
+ update_fill(ctxcanvas, 0);
+
+ cairo_move_to(ctxcanvas->cr, x1, y1);
+ cairo_line_to(ctxcanvas->cr, x2, y2);
+ cairo_stroke(ctxcanvas->cr);
+}
+
+static void cdline(cdCtxCanvas *ctxcanvas, int x1, int y1, int x2, int y2)
+{
+ cdfline(ctxcanvas, (double)x1, (double)y1, (double)x2, (double)y2);
+}
+
+static void cdfarc(cdCtxCanvas *ctxcanvas, double xc, double yc, double w, double h, double a1, double a2)
+{
+ update_fill(ctxcanvas, 0);
+
+ if (w == h)
+ {
+ cairo_arc_negative(ctxcanvas->cr, xc, yc, 0.5*w, -a1*CD_DEG2RAD, -a2*CD_DEG2RAD);
+ cairo_stroke(ctxcanvas->cr);
+ }
+ else /* Ellipse: change the scale to create from the circle */
+ {
+ cairo_save(ctxcanvas->cr); /* save to use the local transform */
+
+ cairo_translate(ctxcanvas->cr, xc, yc);
+ cairo_scale(ctxcanvas->cr, w/h, 1.0);
+ cairo_translate(ctxcanvas->cr, -xc, -yc);
+
+ cairo_arc_negative(ctxcanvas->cr, xc, yc, 0.5*h, -a1*CD_DEG2RAD, -a2*CD_DEG2RAD);
+ cairo_stroke(ctxcanvas->cr);
+
+ cairo_restore(ctxcanvas->cr); /* restore from local */
+ }
+}
+
+static void cdarc(cdCtxCanvas *ctxcanvas, int xc, int yc, int w, int h, double a1, double a2)
+{
+ cdfarc(ctxcanvas, (double)xc, (double)yc, (double)w, (double)h, a1, a2);
+}
+
+static void cdfsector(cdCtxCanvas *ctxcanvas, double xc, double yc, double w, double h, double a1, double a2)
+{
+ update_fill(ctxcanvas, 1);
+
+ if (w == h)
+ {
+ cairo_move_to(ctxcanvas->cr, xc, yc);
+ cairo_arc_negative(ctxcanvas->cr, xc, yc, 0.5*w, -a1*CD_DEG2RAD, -a2*CD_DEG2RAD);
+ cairo_fill(ctxcanvas->cr);
+ }
+ else /* Ellipse: change the scale to create from the circle */
+ {
+ cairo_save(ctxcanvas->cr); /* save to use the local transform */
+
+ cairo_translate(ctxcanvas->cr, xc, yc);
+ cairo_scale(ctxcanvas->cr, w/h, 1.0);
+ cairo_translate(ctxcanvas->cr, -xc, -yc);
+
+ cairo_move_to(ctxcanvas->cr, xc, yc);
+ cairo_arc_negative(ctxcanvas->cr, xc, yc, 0.5*h, -a1*CD_DEG2RAD, -a2*CD_DEG2RAD);
+
+ if (ctxcanvas->canvas->interior_style == CD_SOLID ||
+ ctxcanvas->canvas->interior_style == CD_PATTERN)
+ cairo_fill(ctxcanvas->cr);
+ else
+ {
+ cairo_line_to(ctxcanvas->cr, xc, yc);
+ cairo_stroke(ctxcanvas->cr);
+ }
+
+ cairo_restore(ctxcanvas->cr); /* restore from local */
+ }
+}
+
+static void cdsector(cdCtxCanvas *ctxcanvas, int xc, int yc, int w, int h, double a1, double a2)
+{
+ cdfsector(ctxcanvas, (double)xc, (double)yc, (double)w, (double)h, a1, a2);
+}
+
+static void cdfchord(cdCtxCanvas *ctxcanvas, double xc, double yc, double w, double h, double a1, double a2)
+{
+ update_fill(ctxcanvas, 1);
+
+ if (w == h)
+ {
+ cairo_arc_negative(ctxcanvas->cr, xc, yc, 0.5*w, -a1*CD_DEG2RAD, -a2*CD_DEG2RAD);
+ cairo_fill_preserve(ctxcanvas->cr);
+ cairo_stroke(ctxcanvas->cr);
+ }
+ else /* Ellipse: change the scale to create from the circle */
+ {
+ cairo_save(ctxcanvas->cr); /* save to use the local transform */
+
+ /* local transform */
+ cairo_translate(ctxcanvas->cr, xc, yc);
+ cairo_scale(ctxcanvas->cr, 1.0, w/h);
+
+ cairo_arc_negative(ctxcanvas->cr, xc, yc, 0.5*w, -a1*CD_DEG2RAD, -a2*CD_DEG2RAD);
+ cairo_fill_preserve(ctxcanvas->cr);
+ cairo_stroke(ctxcanvas->cr);
+
+ cairo_restore(ctxcanvas->cr); /* restore from local */
+ }
+}
+
+static void cdchord(cdCtxCanvas *ctxcanvas, int xc, int yc, int w, int h, double a1, double a2)
+{
+ cdfchord(ctxcanvas, (double)xc, (double)yc, (double)w, (double)h, a1, a2);
+}
+
+static void cdfrect(cdCtxCanvas *ctxcanvas, double xmin, double xmax, double ymin, double ymax)
+{
+ update_fill(ctxcanvas, 0);
+ cairo_rectangle(ctxcanvas->cr, xmin, ymin, xmax-xmin+1, ymax-ymin+1);
+ cairo_stroke(ctxcanvas->cr);
+}
+
+static void cdrect(cdCtxCanvas *ctxcanvas, int xmin, int xmax, int ymin, int ymax)
+{
+ cdfrect(ctxcanvas, (double)xmin, (double)xmax, (double)ymin, (double)ymax);
+}
+
+static void cdfbox(cdCtxCanvas *ctxcanvas, double xmin, double xmax, double ymin, double ymax)
+{
+ update_fill(ctxcanvas, 1);
+ cairo_rectangle(ctxcanvas->cr, xmin, ymin, xmax-xmin+1, ymax-ymin+1);
+ cairo_fill(ctxcanvas->cr);
+}
+
+static void cdbox(cdCtxCanvas *ctxcanvas, int xmin, int xmax, int ymin, int ymax)
+{
+ cdfbox(ctxcanvas, (double)xmin, (double)xmax, (double)ymin, (double)ymax);
+}
+
+static void cdftext(cdCtxCanvas *ctxcanvas, double x, double y, const char *s, int len)
+{
+ cairo_text_extents_t extents;
+ cairo_font_extents_t font_extents;
+ int dir = -1;
+ double x_origin = x;
+ double y_origin = y;
+
+ s = StrConvertToUTF8(ctxcanvas, s, len);
+
+ cairo_set_scaled_font(ctxcanvas->cr, ctxcanvas->font);
+ cairo_font_extents(ctxcanvas->cr, &font_extents);
+ cairo_text_extents(ctxcanvas->cr, s, &extents);
+
+ switch (ctxcanvas->canvas->text_alignment)
+ {
+ case CD_BASE_RIGHT:
+ case CD_NORTH_EAST:
+ case CD_EAST:
+ case CD_SOUTH_EAST:
+ x = x - (int)extents.width;
+ break;
+ case CD_BASE_CENTER:
+ case CD_CENTER:
+ case CD_NORTH:
+ case CD_SOUTH:
+ x = x - (int)(extents.width/2);
+ break;
+ case CD_BASE_LEFT:
+ case CD_NORTH_WEST:
+ case CD_WEST:
+ case CD_SOUTH_WEST:
+ x = x;
+ break;
+ }
+
+ if (ctxcanvas->canvas->invert_yaxis)
+ dir = 1;
+
+ switch (ctxcanvas->canvas->text_alignment)
+ {
+ case CD_BASE_LEFT:
+ case CD_BASE_CENTER:
+ case CD_BASE_RIGHT:
+ y = y;
+ break;
+ case CD_SOUTH_EAST:
+ case CD_SOUTH_WEST:
+ case CD_SOUTH:
+ y = y - dir*(int)font_extents.descent;
+ break;
+ case CD_NORTH_EAST:
+ case CD_NORTH:
+ case CD_NORTH_WEST:
+ y = y + dir*(int)(extents.height - font_extents.descent);
+ break;
+ case CD_CENTER:
+ case CD_EAST:
+ case CD_WEST:
+ y = y + dir*(int)(extents.height/2 - font_extents.descent);
+ break;
+ }
+
+ if (ctxcanvas->canvas->text_orientation != 0)
+ {
+ cairo_matrix_t matrix;
+ double angle = CD_DEG2RAD * ctxcanvas->canvas->text_orientation;
+ double cos_angle = cos(angle);
+ double sin_angle = sin(angle);
+
+ cdfRotatePoint(ctxcanvas->canvas, x, y, x_origin, y_origin, &x, &y, sin_angle, cos_angle);
+
+ cairo_get_font_matrix(ctxcanvas->cr, &matrix);
+ cairo_matrix_rotate(&matrix, -angle);
+ cairo_set_font_matrix(ctxcanvas->cr, &matrix);
+ }
+
+ update_fill(ctxcanvas, 0);
+
+ cairo_move_to(ctxcanvas->cr, x, y);
+ cairo_show_text(ctxcanvas->cr, s);
+ cairo_fill(ctxcanvas->cr);
+}
+
+static void cdtext(cdCtxCanvas *ctxcanvas, int x, int y, const char *s, int len)
+{
+ cdftext(ctxcanvas, (double)x, (double)y, s, len);
+}
+
+static void cdgettextsize(cdCtxCanvas *ctxcanvas, const char *s, int len, int *width, int *height)
+{
+ cairo_text_extents_t extents;
+
+ if (!ctxcanvas->font)
+ return;
+
+ s = StrConvertToUTF8(ctxcanvas, s, len);
+
+ cairo_set_scaled_font(ctxcanvas->cr, ctxcanvas->font);
+ cairo_text_extents(ctxcanvas->cr, s, &extents);
+
+ if (width)
+ *width = (int)extents.width;
+
+ if (height)
+ *height = (int)extents.height;
+}
+
+static void cdpoly(cdCtxCanvas *ctxcanvas, int mode, cdPoint* poly, int n)
+{
+ int i;
+
+ if (mode == CD_CLIP)
+ return;
+
+ if (mode == CD_FILL)
+ {
+ update_fill(ctxcanvas, 1);
+
+ if (ctxcanvas->holes || ctxcanvas->canvas->fill_mode==CD_EVENODD)
+ cairo_set_fill_rule(ctxcanvas->cr, CAIRO_FILL_RULE_EVEN_ODD);
+ else
+ cairo_set_fill_rule(ctxcanvas->cr, CAIRO_FILL_RULE_WINDING);
+ }
+ else
+ update_fill(ctxcanvas, 0);
+
+ cairo_move_to(ctxcanvas->cr, poly[0].x, poly[0].y);
+
+ if (mode == CD_BEZIER)
+ {
+ for (i=1; i<n; i+=3)
+ cairo_curve_to(ctxcanvas->cr, poly[i].x, poly[i].y, poly[i+1].x, poly[i+1].y, poly[i+2].x, poly[i+2].y);
+ }
+ else
+ {
+ int hole_index = 0;
+
+ for (i=1; i<n; i++)
+ {
+ if (ctxcanvas->holes && i == ctxcanvas->poly_holes[hole_index])
+ {
+ cairo_move_to(ctxcanvas->cr, poly[i].x, poly[i].y);
+ hole_index++;
+ }
+ else
+ cairo_line_to(ctxcanvas->cr, poly[i].x, poly[i].y);
+ }
+ }
+
+ switch (mode)
+ {
+ case CD_CLOSED_LINES :
+ cairo_close_path(ctxcanvas->cr);
+ cairo_stroke(ctxcanvas->cr);
+ break;
+ case CD_OPEN_LINES :
+ cairo_stroke(ctxcanvas->cr);
+ break;
+ case CD_BEZIER :
+ cairo_stroke(ctxcanvas->cr);
+ break;
+ case CD_FILL :
+ cairo_fill(ctxcanvas->cr);
+ break;
+ }
+}
+
+static void cdfpoly(cdCtxCanvas *ctxcanvas, int mode, cdfPoint* poly, int n)
+{
+ int i;
+
+ if (mode == CD_CLIP)
+ return;
+
+ if (mode == CD_FILL)
+ {
+ update_fill(ctxcanvas, 1);
+
+ if (ctxcanvas->holes || ctxcanvas->canvas->fill_mode==CD_EVENODD)
+ cairo_set_fill_rule(ctxcanvas->cr, CAIRO_FILL_RULE_EVEN_ODD);
+ else
+ cairo_set_fill_rule(ctxcanvas->cr, CAIRO_FILL_RULE_WINDING);
+ }
+ else
+ update_fill(ctxcanvas, 0);
+
+ cairo_move_to(ctxcanvas->cr, poly[0].x, poly[0].y);
+
+ if (mode == CD_BEZIER)
+ {
+ for (i=1; i<n; i+=3)
+ cairo_curve_to(ctxcanvas->cr, poly[i].x, poly[i].y, poly[i+1].x, poly[i+1].y, poly[i+2].x, poly[i+2].y);
+ }
+ else
+ {
+ int hole_index = 0;
+
+ for (i=1; i<n; i++)
+ {
+ if (ctxcanvas->holes && i == ctxcanvas->poly_holes[hole_index])
+ {
+ cairo_move_to(ctxcanvas->cr, poly[i].x, poly[i].y);
+ hole_index++;
+ }
+ else
+ cairo_line_to(ctxcanvas->cr, poly[i].x, poly[i].y);
+ }
+ }
+
+ switch (mode)
+ {
+ case CD_CLOSED_LINES :
+ cairo_close_path(ctxcanvas->cr);
+ cairo_stroke(ctxcanvas->cr);
+ break;
+ case CD_OPEN_LINES :
+ cairo_stroke(ctxcanvas->cr);
+ break;
+ case CD_BEZIER :
+ cairo_stroke(ctxcanvas->cr);
+ break;
+ case CD_FILL :
+ cairo_fill(ctxcanvas->cr);
+ break;
+ }
+}
+
+/******************************************************/
+
+static void cdgetimagergb(cdCtxCanvas *ctxcanvas, unsigned char *r, unsigned char *g, unsigned char *b, int x, int y, int w, int h)
+{
+ int col, lin, pos;
+ double red, green, blue;
+ cairo_pattern_t *pattern;
+
+ cairo_save (ctxcanvas->cr);
+
+ /* reset to the identity. */
+ cairo_identity_matrix(ctxcanvas->cr);
+
+ if (ctxcanvas->canvas->invert_yaxis==0) // if 0, invert because the transform was reset here
+ y = _cdInvertYAxis(ctxcanvas->canvas, y);
+
+ //TODO:fix
+ pattern = cairo_get_source(ctxcanvas->cr);
+ if (!pattern)
+ return;
+
+ for (lin = (y-h+1); lin < h; lin++)
+ {
+ for (col = x; col < w; col++)
+ {
+ pos = (h-lin-1) * w + col;
+ cairo_pattern_get_color_stop_rgba(pattern, pos, NULL, &red, &green, &blue, NULL);
+ *r = (unsigned char)(red*255.0);
+ *g = (unsigned char)(green*255.0);
+ *b = (unsigned char)(blue*255.0);
+ }
+ }
+
+ cairo_pattern_destroy(pattern);
+ cairo_restore (ctxcanvas->cr);
+}
+
+static void cdputimagerectrgb(cdCtxCanvas *ctxcanvas, int iw, int ih, const unsigned char *r, const unsigned char *g, const unsigned char *b, int x, int y, int w, int h, int xmin, int xmax, int ymin, int ymax)
+{
+ int i, j, d, rw, rh;
+ unsigned char* rgb_data;
+ int stride;
+ cairo_surface_t* surface, *new_surface;
+ cairo_t* cr;
+
+ if (xmin<0 || ymin<0 || xmax-xmin+1>iw || ymax-ymin+1>ih) return;
+
+ rw = xmax-xmin+1;
+ rh = ymax-ymin+1;
+ y -= (h - 1); /* Cairo image origin is at top-left */
+
+ stride = cairo_format_stride_for_width(CAIRO_FORMAT_RGB24, rw);
+ rgb_data = (unsigned char*)malloc(sizeof(unsigned char)*(stride * rh));
+
+ if (!rgb_data) return;
+
+ surface = cairo_image_surface_create_for_data(rgb_data, CAIRO_FORMAT_RGB24, rw, rh, stride);
+
+ d = 0;
+ for (i=ymax; i>=ymin; i--)
+ {
+ for (j=xmin; j<=xmax; j++)
+ {
+ rgb_data[d] = b[i*iw+j]; d++;
+ rgb_data[d] = g[i*iw+j]; d++;
+ rgb_data[d] = r[i*iw+j]; d++;
+ rgb_data[d] = (unsigned char)0; d++;
+ }
+ }
+
+ /* Scaling surface to fit into the image */
+// if (w != rw || h != rh)
+ {
+ new_surface = cairo_surface_create_similar(surface, CAIRO_CONTENT_COLOR, w, h);
+ cr = cairo_create (new_surface);
+
+ /* Scale *before* setting the source surface (1) */
+ cairo_scale (cr, (double)w / rw, (double)h / rh);
+ cairo_set_source_surface (cr, surface, 0, 0);
+
+ /* To avoid getting the edge pixels blended with 0 alpha,
+ * which would occur with the default EXTEND_NONE */
+ cairo_pattern_set_extend (cairo_get_source(cr), CAIRO_EXTEND_REFLECT);
+
+ /* Replace the destination with the source instead of overlaying */
+ cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
+
+ cairo_paint (cr);
+
+ cairo_destroy (cr);
+ }
+
+ /* Put image rect */
+ cairo_set_source_surface(ctxcanvas->cr, new_surface, x, y);
+ cairo_pattern_set_extend(cairo_get_source(ctxcanvas->cr), CAIRO_EXTEND_NONE);
+ cairo_paint(ctxcanvas->cr);
+
+ cairo_surface_destroy(surface);
+ cairo_surface_destroy(new_surface);
+ free(rgb_data);
+}
+
+static void cdputimagerectrgba(cdCtxCanvas *ctxcanvas, int iw, int ih, const unsigned char *r, const unsigned char *g, const unsigned char *b, const unsigned char *a, int x, int y, int w, int h, int xmin, int xmax, int ymin, int ymax)
+{
+ int i, j, d, rw, rh;
+ unsigned char* rgba_data;
+ int stride;
+ cairo_surface_t* surface, *new_surface, *new_alpha_surface;
+ cairo_t* cr;
+
+ if (xmin<0 || ymin<0 || xmax-xmin+1>iw || ymax-ymin+1>ih) return;
+
+ rw = xmax-xmin+1;
+ rh = ymax-ymin+1;
+ y -= (h - 1); /* Cairo image origin is at top-left */
+
+ stride = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, rw);
+ rgba_data = (unsigned char*)malloc(sizeof(unsigned char)*(stride * rh));
+
+ if (!rgba_data) return;
+
+ surface = cairo_image_surface_create_for_data(rgba_data, CAIRO_FORMAT_ARGB32, rw, rh, stride);
+
+ d = 0;
+ for (i=ymax; i>=ymin; i--)
+ {
+ for (j=xmin; j<=xmax; j++)
+ {
+ rgba_data[d] = b[i*iw+j]; d++;
+ rgba_data[d] = g[i*iw+j]; d++;
+ rgba_data[d] = r[i*iw+j]; d++;
+ rgba_data[d] = a[i*iw+j]; d++;
+ }
+ }
+
+ // TODO: use only one surface ?????
+
+ /* Scaling RGB surface to fit into the image */
+// if (w != rw || h != rh)
+ {
+ new_surface = cairo_surface_create_similar(surface, CAIRO_CONTENT_COLOR, w, h);
+ cr = cairo_create (new_surface);
+
+ /* Scale *before* setting the source surface (1) */
+ cairo_scale (cr, (double)w / rw, (double)h / rh);
+ cairo_set_source_surface (cr, surface, 0, 0);
+ cairo_paint (cr);
+
+ cairo_destroy (cr);
+ }
+
+ /* Scaling ALPHA surface to fit into the image */
+ {
+ new_alpha_surface = cairo_surface_create_similar(surface, CAIRO_CONTENT_ALPHA, w, h);
+ cr = cairo_create (new_alpha_surface);
+
+ /* Scale *before* setting the source surface (1) */
+ cairo_scale (cr, (double)w / rw, (double)h / rh);
+ cairo_set_source_surface (cr, surface, 0, 0);
+ cairo_paint (cr);
+
+ cairo_destroy (cr);
+ }
+
+ /* Put image rect */
+ cairo_set_source_surface(ctxcanvas->cr, new_surface, x, y);
+ cairo_mask_surface(ctxcanvas->cr, new_alpha_surface, x, y);
+// cairo_pattern_set_extend(cairo_get_source(ctxcanvas->cr), CAIRO_EXTEND_NONE);
+// cairo_paint(ctxcanvas->cr);
+
+ cairo_surface_destroy(surface);
+ cairo_surface_destroy(new_surface);
+ cairo_surface_destroy(new_alpha_surface);
+ free(rgba_data);
+}
+
+static void cdputimagerectmap(cdCtxCanvas *ctxcanvas, int iw, int ih, const unsigned char *index, const long int *colors, int x, int y, int w, int h, int xmin, int xmax, int ymin, int ymax)
+{
+ int i, j, d, rw, rh;
+ unsigned char* rgb_data;
+ int stride;
+ cairo_surface_t* surface, *new_surface;
+ cairo_t* cr;
+
+ if (xmin<0 || ymin<0 || xmax-xmin+1>iw || ymax-ymin+1>ih) return;
+
+ rw = xmax-xmin+1;
+ rh = ymax-ymin+1;
+ y -= (h - 1); /* Cairo image origin is at top-left */
+
+ stride = cairo_format_stride_for_width(CAIRO_FORMAT_RGB24, rw);
+ rgb_data = (unsigned char*)malloc(sizeof(unsigned char)*(stride * rh));
+
+ if (!rgb_data) return;
+
+ surface = cairo_image_surface_create_for_data(rgb_data, CAIRO_FORMAT_RGB24, rw, rh, stride);
+
+ d = 0;
+ for (i=ymax; i>=ymin; i--)
+ {
+ for (j=xmin; j<=xmax; j++)
+ {
+ long c = colors[index[i*iw+j]];
+ rgb_data[d] = cdRed(c); d++;
+ rgb_data[d] = cdGreen(c); d++;
+ rgb_data[d] = cdBlue(c); d++;
+ rgb_data[d] = (unsigned char)0; d++;
+ }
+ }
+
+ /* Scaling surface to fit into the image */
+// if (w != rw || h != rh)
+ {
+ new_surface = cairo_surface_create_similar(surface, CAIRO_CONTENT_COLOR, w, h);
+ cr = cairo_create (new_surface);
+
+ /* Scale *before* setting the source surface (1) */
+ cairo_scale (cr, (double)w / rw, (double)h / rh);
+ cairo_set_source_surface (cr, surface, 0, 0);
+
+ /* To avoid getting the edge pixels blended with 0 alpha,
+ * which would occur with the default EXTEND_NONE */
+ cairo_pattern_set_extend (cairo_get_source(cr), CAIRO_EXTEND_REFLECT);
+
+ /* Replace the destination with the source instead of overlaying */
+ cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
+
+ cairo_paint (cr);
+
+ cairo_destroy (cr);
+ }
+
+ cairo_set_source_surface(ctxcanvas->cr, surface, x, y);
+ cairo_pattern_set_extend(cairo_get_source(ctxcanvas->cr), CAIRO_EXTEND_NONE);
+ cairo_paint(ctxcanvas->cr);
+
+ cairo_surface_destroy(surface);
+ cairo_surface_destroy(new_surface);
+ free(rgb_data);
+}
+
+static void cdpixel(cdCtxCanvas *ctxcanvas, int x, int y, long int color)
+{
+ cairo_pattern_t* old_source = cairo_get_source(ctxcanvas->cr);
+ cairo_set_source_rgba(ctxcanvas->cr, cdCairoGetRed(color), cdCairoGetGreen(color), cdCairoGetBlue(color), cdCairoGetAlpha(color));
+
+ cairo_move_to(ctxcanvas->cr, (double)x, (double)y);
+ cairo_arc(ctxcanvas->cr, (double)x, (double)y, 0.5, 0.0, 2 * M_PI);
+
+ cairo_fill(ctxcanvas->cr);
+ cairo_set_source(ctxcanvas->cr, old_source);
+}
+
+static cdCtxImage *cdcreateimage (cdCtxCanvas *ctxcanvas, int w, int h)
+{
+ cdCtxImage *ctximage = (cdCtxImage *)malloc(sizeof(cdCtxImage));
+ cairo_surface_t* img_surface;
+
+ ctximage->w = w;
+ ctximage->h = h;
+ ctximage->bpp = ctxcanvas->canvas->bpp;
+ ctximage->xres = ctxcanvas->canvas->xres;
+ ctximage->yres = ctxcanvas->canvas->yres;
+ ctximage->w_mm = ctximage->w / ctximage->xres;
+ ctximage->h_mm = ctximage->h / ctximage->yres;
+
+ img_surface = cairo_surface_create_similar(cairo_get_target(ctxcanvas->cr), CAIRO_CONTENT_COLOR_ALPHA, w, h);
+ ctximage->img = cairo_create(img_surface);
+
+ if (!ctximage->img)
+ {
+ free(ctximage);
+ return (void *)0;
+ }
+
+ cairo_rectangle(ctximage->img, 0, 0, ctximage->w, ctximage->h);
+ cairo_set_source_rgba(ctximage->img, 1.0, 1.0, 1.0, 1.0); /* white opaque */
+ cairo_fill(ctximage->img);
+
+ cairo_surface_destroy(img_surface);
+
+ return (void*)ctximage;
+}
+
+static void cdkillimage (cdCtxImage *ctximage)
+{
+ cairo_destroy(ctximage->img);
+ free(ctximage);
+}
+
+static void cdgetimage (cdCtxCanvas *ctxcanvas, cdCtxImage *ctximage, int x, int y)
+{
+ cairo_save (ctximage->img);
+
+ /* reset to the identity. */
+ cairo_identity_matrix(ctximage->img);
+
+ cairo_reset_clip(ctximage->img);
+
+ if (ctxcanvas->canvas->invert_yaxis==0) /* if 0, invert because the transform was reset here */
+ y = _cdInvertYAxis(ctxcanvas->canvas, y);
+
+ /* y is the bottom-left of the image in CD, must be at upper-left */
+ y -= ctximage->h-1;
+
+ /* creates a pattern from the canvas and sets it as source in the image. */
+ cairo_set_source_surface(ctximage->img, cairo_get_target(ctxcanvas->cr), x, y);
+
+ cairo_pattern_set_extend (cairo_get_source(ctximage->img), CAIRO_EXTEND_NONE);
+ cairo_set_operator (ctximage->img, CAIRO_OPERATOR_SOURCE);
+ cairo_paint(ctximage->img); /* paints the current source everywhere within the current clip region. */
+
+ /* must restore matrix, clipping and source */
+ cairo_restore (ctximage->img);
+}
+
+static void cdputimagerect (cdCtxCanvas *ctxcanvas, cdCtxImage *ctximage, int x, int y, int xmin, int xmax, int ymin, int ymax)
+{
+ cairo_save (ctxcanvas->cr);
+
+ /* y is the bottom-left of the image region in CD */
+ y -= (ymax-ymin+1)-1;
+
+ cairo_reset_clip(ctxcanvas->cr);
+ cairo_rectangle(ctxcanvas->cr, x, y, xmax-xmin+1, ymax-ymin+1);
+ cairo_clip(ctxcanvas->cr);
+
+ ymin = (ctximage->h-1) - ymax; /* ymin starts at the bottom of the image in CD, we want ymax, but oriented top-down */
+
+ /* creates a pattern from the image and sets it as source in the canvas. */
+ cairo_set_source_surface(ctxcanvas->cr, cairo_get_target(ctximage->img), xmin, ymin);
+
+ cairo_pattern_set_extend (cairo_get_source(ctxcanvas->cr), CAIRO_EXTEND_NONE);
+ cairo_set_operator (ctxcanvas->cr, CAIRO_OPERATOR_SOURCE);
+ cairo_paint(ctxcanvas->cr); /* paints the current source everywhere within the current clip region. */
+
+ /* must restore clipping and source */
+ cairo_restore (ctxcanvas->cr);
+}
+
+static void cdscrollarea (cdCtxCanvas *ctxcanvas, int xmin, int xmax, int ymin, int ymax, int dx, int dy)
+{
+ cairo_save (ctxcanvas->cr);
+
+ /* reset to identity */
+ cairo_identity_matrix(ctxcanvas->cr);
+
+ if (ctxcanvas->canvas->invert_yaxis==0) /* if 0, invert because the transform was reset here */
+ {
+ dy = -dy;
+ ymin = _cdInvertYAxis(ctxcanvas->canvas, ymin);
+ ymax = _cdInvertYAxis(ctxcanvas->canvas, ymax);
+ _cdSwapInt(ymin, ymax);
+ }
+
+ cairo_reset_clip(ctxcanvas->cr);
+ cairo_rectangle(ctxcanvas->cr, xmin+dx, ymin+dy, xmax-xmin+1, ymax-ymin+1);
+ cairo_clip(ctxcanvas->cr);
+
+ /* creates a pattern from the canvas and sets it as source in the canvas. */
+ cairo_set_source_surface(ctxcanvas->cr, cairo_get_target(ctxcanvas->cr), xmin, ymin);
+
+ cairo_pattern_set_extend (cairo_get_source(ctxcanvas->cr), CAIRO_EXTEND_NONE);
+ cairo_set_operator (ctxcanvas->cr, CAIRO_OPERATOR_SOURCE);
+ cairo_paint(ctxcanvas->cr); /* paints the current source everywhere within the current clip region. */
+
+ /* must restore matrix, clipping and source */
+ cairo_restore (ctxcanvas->cr);
+}
+
+static void cdtransform(cdCtxCanvas *ctxcanvas, const double* matrix)
+{
+ /* reset to identity */
+ cairo_identity_matrix(ctxcanvas->cr);
+ ctxcanvas->canvas->invert_yaxis = 1;
+
+ if (matrix)
+ {
+ cairo_matrix_t mtx;
+
+ /* configure a bottom-up coordinate system */
+ mtx.xx = 1; mtx.yx = 0;
+ mtx.xy = 0; mtx.yy = -1;
+ mtx.x0 = 0; mtx.y0 = (ctxcanvas->canvas->h-1);
+ cairo_transform(ctxcanvas->cr, &mtx);
+ ctxcanvas->canvas->invert_yaxis = 0;
+
+ mtx.xx = matrix[0]; mtx.yx = matrix[1];
+ mtx.xy = matrix[2]; mtx.yy = matrix[3];
+ mtx.x0 = matrix[4]; mtx.y0 = matrix[5];
+ cairo_transform(ctxcanvas->cr, &mtx);
+ }
+ else if (ctxcanvas->rotate_angle)
+ {
+ /* rotation = translate to point + rotation + translate back */
+ /* the rotation must be corrected because of the Y axis orientation */
+ cairo_translate(ctxcanvas->cr, ctxcanvas->rotate_center_x, _cdInvertYAxis(ctxcanvas->canvas, ctxcanvas->rotate_center_y));
+ cairo_rotate(ctxcanvas->cr, (double)-ctxcanvas->rotate_angle * CD_DEG2RAD);
+ cairo_translate(ctxcanvas->cr, -ctxcanvas->rotate_center_x, -_cdInvertYAxis(ctxcanvas->canvas, ctxcanvas->rotate_center_y));
+ }
+}
+
+/******************************************************************/
+
+static void set_hatchboxsize_attrib(cdCtxCanvas *ctxcanvas, char* data)
+{
+ int hatchboxsize;
+
+ if (data == NULL)
+ {
+ ctxcanvas->hatchboxsize = 8;
+ return;
+ }
+
+ sscanf(data, "%d", &hatchboxsize);
+ ctxcanvas->hatchboxsize = hatchboxsize;
+}
+
+static char* get_hatchboxsize_attrib(cdCtxCanvas *ctxcanvas)
+{
+ static char size[10];
+ sprintf(size, "%d", ctxcanvas->hatchboxsize);
+ return size;
+}
+
+static cdAttribute hatchboxsize_attrib =
+{
+ "HATCHBOXSIZE",
+ set_hatchboxsize_attrib,
+ get_hatchboxsize_attrib
+};
+
+static void set_poly_attrib(cdCtxCanvas *ctxcanvas, char* data)
+{
+ int hole;
+
+ if (data == NULL)
+ {
+ ctxcanvas->holes = 0;
+ return;
+ }
+
+ sscanf(data, "%d", &hole);
+ ctxcanvas->poly_holes[ctxcanvas->holes] = hole;
+ ctxcanvas->holes++;
+}
+
+static char* get_poly_attrib(cdCtxCanvas *ctxcanvas)
+{
+ static char holes[10];
+ sprintf(holes, "%d", ctxcanvas->holes);
+ return holes;
+}
+
+static cdAttribute poly_attrib =
+{
+ "POLYHOLE",
+ set_poly_attrib,
+ get_poly_attrib
+};
+
+static void set_rotate_attrib(cdCtxCanvas* ctxcanvas, char* data)
+{
+ /* ignore ROTATE if transform is set,
+ because there is native support for transformations */
+ if (ctxcanvas->canvas->use_matrix)
+ return;
+
+ if (data)
+ {
+ sscanf(data, "%g %d %d", &ctxcanvas->rotate_angle,
+ &ctxcanvas->rotate_center_x,
+ &ctxcanvas->rotate_center_y);
+ }
+ else
+ {
+ ctxcanvas->rotate_angle = 0;
+ ctxcanvas->rotate_center_x = 0;
+ ctxcanvas->rotate_center_y = 0;
+ }
+
+ cdtransform(ctxcanvas, NULL);
+}
+
+static char* get_rotate_attrib(cdCtxCanvas* ctxcanvas)
+{
+ static char data[100];
+
+ if (!ctxcanvas->rotate_angle)
+ return NULL;
+
+ sprintf(data, "%g %d %d", (double)ctxcanvas->rotate_angle,
+ ctxcanvas->rotate_center_x,
+ ctxcanvas->rotate_center_y);
+
+ return data;
+}
+
+static cdAttribute rotate_attrib =
+{
+ "ROTATE",
+ set_rotate_attrib,
+ get_rotate_attrib
+};
+
+static void set_aa_attrib(cdCtxCanvas* ctxcanvas, char* data)
+{
+ cairo_font_options_t* options = NULL;
+ cairo_scaled_font_get_font_options(ctxcanvas->font, options);
+
+ if (!data || data[0] == '0')
+ {
+ cairo_set_antialias(ctxcanvas->cr, CAIRO_ANTIALIAS_NONE);
+ cairo_font_options_set_antialias(options, CAIRO_ANTIALIAS_NONE);
+ }
+ else
+ {
+ cairo_set_antialias(ctxcanvas->cr, CAIRO_ANTIALIAS_DEFAULT);
+ cairo_font_options_set_antialias(options, CAIRO_ANTIALIAS_DEFAULT);
+ }
+
+ cairo_font_options_destroy(options);
+}
+
+static char* get_aa_attrib(cdCtxCanvas* ctxcanvas)
+{
+ if (cairo_get_antialias(ctxcanvas->cr) != CAIRO_ANTIALIAS_NONE)
+ return "1";
+ else
+ return "0";
+}
+
+static cdAttribute aa_attrib =
+{
+ "ANTIALIAS",
+ set_aa_attrib,
+ get_aa_attrib
+};
+
+static void set_linegradient_attrib(cdCtxCanvas* ctxcanvas, char* data)
+{
+ if (data)
+ {
+ int x1, y1, x2, y2;
+ double offset;
+ int count = 1;
+
+ sscanf(data, "%d %d %d %d", &x1, &y1, &x2, &y2);
+
+ if (ctxcanvas->canvas->invert_yaxis)
+ {
+ y1 = _cdInvertYAxis(ctxcanvas->canvas, y1);
+ y2 = _cdInvertYAxis(ctxcanvas->canvas, y2);
+ }
+
+ if (ctxcanvas->pattern)
+ cairo_pattern_destroy(ctxcanvas->pattern);
+
+ ctxcanvas->pattern = cairo_pattern_create_linear((double)x1, (double)y1, (double)x2, (double)y2);
+ cairo_pattern_reference(ctxcanvas->pattern);
+
+ for(offset = 0.1; offset < 1.0; offset += 0.1)
+ {
+ if ( count % 2 )
+ {
+ cairo_pattern_add_color_stop_rgb(ctxcanvas->pattern, offset,
+ cdCairoGetRed(ctxcanvas->canvas->foreground),
+ cdCairoGetGreen(ctxcanvas->canvas->foreground),
+ cdCairoGetBlue(ctxcanvas->canvas->foreground));
+ }
+ else
+ {
+ cairo_pattern_add_color_stop_rgb(ctxcanvas->pattern, offset,
+ cdCairoGetRed(ctxcanvas->canvas->background),
+ cdCairoGetGreen(ctxcanvas->canvas->background),
+ cdCairoGetBlue(ctxcanvas->canvas->background));
+ }
+ count++;
+ }
+
+ cairo_pattern_set_extend(ctxcanvas->pattern, CAIRO_EXTEND_REPEAT);
+
+ cairo_set_source(ctxcanvas->cr, ctxcanvas->pattern);
+ ctxcanvas->last_source = 1;
+ }
+}
+
+static char* get_linegradient_attrib(cdCtxCanvas* ctxcanvas)
+{
+ double x1, y1, x2, y2;
+
+ if (cairo_pattern_get_linear_points(ctxcanvas->pattern, &x1, &y1, &x2, &y2) == CAIRO_STATUS_SUCCESS)
+ {
+ static char data[100];
+ sprintf(data, "%d %d %d %d", (int)x1, (int)y1, (int)x2, (int)y2);
+ return data;
+ }
+ else
+ return NULL;
+}
+
+static cdAttribute linegradient_attrib =
+{
+ "LINEGRADIENT",
+ set_linegradient_attrib,
+ get_linegradient_attrib
+};
+
+static void set_radialgradient_attrib(cdCtxCanvas* ctxcanvas, char* data)
+{
+ if (data)
+ {
+ int cx1, cy1, cx2, cy2;
+ float rad1, rad2;
+ double offset;
+ int count = 1;
+
+ sscanf(data, "%d %d %g %d %d %g", &cx1, &cy1, &rad1, &cx2, &cy2, &rad2);
+
+ if (ctxcanvas->canvas->invert_yaxis)
+ {
+ cy1 = _cdInvertYAxis(ctxcanvas->canvas, cy1);
+ cy2 = _cdInvertYAxis(ctxcanvas->canvas, cy2);
+ }
+
+ if (ctxcanvas->pattern)
+ cairo_pattern_destroy(ctxcanvas->pattern);
+
+ ctxcanvas->pattern = cairo_pattern_create_radial((double)cx1, (double)cx1, (double)rad1, (double)cx2, (double)cx2, (double)rad2);
+ cairo_pattern_reference(ctxcanvas->pattern);
+
+ for(offset = 0.1; offset < 1.0; offset += 0.1)
+ {
+ if ( count % 2 )
+ {
+ cairo_pattern_add_color_stop_rgb(ctxcanvas->pattern, offset,
+ cdCairoGetRed(ctxcanvas->canvas->foreground),
+ cdCairoGetGreen(ctxcanvas->canvas->foreground),
+ cdCairoGetBlue(ctxcanvas->canvas->foreground));
+ }
+ else
+ {
+ cairo_pattern_add_color_stop_rgb(ctxcanvas->pattern, offset,
+ cdCairoGetRed(ctxcanvas->canvas->background),
+ cdCairoGetGreen(ctxcanvas->canvas->background),
+ cdCairoGetBlue(ctxcanvas->canvas->background));
+ }
+ count++;
+ }
+
+ cairo_pattern_set_extend(ctxcanvas->pattern, CAIRO_EXTEND_REPEAT);
+
+ cairo_set_source(ctxcanvas->cr, ctxcanvas->pattern);
+ ctxcanvas->last_source = 1;
+ }
+}
+
+static char* get_radialgradient_attrib(cdCtxCanvas* ctxcanvas)
+{
+ double cx1, cy1, rad1, cx2, cy2, rad2;
+
+ if (cairo_pattern_get_radial_circles(ctxcanvas->pattern, &cx1, &cy1, &rad1, &cx2, &cy2, &rad2) == CAIRO_STATUS_SUCCESS)
+ {
+ static char data[100];
+ sprintf(data, "%d %d %g %d %d %g", (int)cx1, (int)cy1, (float)rad1, (int)cx2, (int)cy2, (float)rad2);
+ return data;
+ }
+ else
+ return NULL;
+}
+
+static cdAttribute radialgradient_attrib =
+{
+ "RADIALGRADIENT",
+ set_radialgradient_attrib,
+ get_radialgradient_attrib
+};
+
+static char* get_version_attrib(cdCtxCanvas* ctxcanvas)
+{
+ (void)ctxcanvas;
+ return (char*)cairo_version_string();
+}
+
+static cdAttribute version_attrib =
+{
+ "CAIROVERSION",
+ NULL,
+ get_version_attrib
+};
+
+static void set_interp_attrib(cdCtxCanvas* ctxcanvas, char* data)
+{
+ if (data && cdStrEqualNoCase(data, "BEST"))
+ cairo_pattern_set_filter(cairo_get_source(ctxcanvas->cr), CAIRO_FILTER_BEST);
+ else if (data && cdStrEqualNoCase(data, "NEAREST"))
+ cairo_pattern_set_filter(cairo_get_source(ctxcanvas->cr), CAIRO_FILTER_NEAREST);
+ else if (data && cdStrEqualNoCase(data, "FAST"))
+ cairo_pattern_set_filter(cairo_get_source(ctxcanvas->cr), CAIRO_FILTER_FAST);
+ else if (data && cdStrEqualNoCase(data, "BILINEAR"))
+ cairo_pattern_set_filter(cairo_get_source(ctxcanvas->cr), CAIRO_FILTER_BILINEAR);
+ else
+ cairo_pattern_set_filter(cairo_get_source(ctxcanvas->cr), CAIRO_FILTER_GOOD);
+}
+
+static char* get_interp_attrib(cdCtxCanvas* ctxcanvas)
+{
+ if(cairo_pattern_get_filter(cairo_get_source(ctxcanvas->cr)) == CAIRO_FILTER_BEST)
+ return "BEST";
+ else if(cairo_pattern_get_filter(cairo_get_source(ctxcanvas->cr)) == CAIRO_FILTER_NEAREST)
+ return "NEAREST";
+ else if(cairo_pattern_get_filter(cairo_get_source(ctxcanvas->cr)) == CAIRO_FILTER_FAST)
+ return "FAST";
+ else if(cairo_pattern_get_filter(cairo_get_source(ctxcanvas->cr)) == CAIRO_FILTER_BILINEAR)
+ return "BILINEAR";
+ else
+ return "GOOD";
+}
+
+static cdAttribute interp_attrib =
+{
+ "IMGINTERP",
+ set_interp_attrib,
+ get_interp_attrib
+};
+
+static char* get_cairodc_attrib(cdCtxCanvas *ctxcanvas)
+{
+ return (char*)ctxcanvas->cr;
+}
+
+static cdAttribute cairodc_attrib =
+{
+ "CAIRODC",
+ NULL,
+ get_cairodc_attrib
+};
+
+
+cdCtxCanvas *cdcairoCreateCanvas(cdCanvas* canvas, cairo_t* cr)
+{
+ cdCtxCanvas *ctxcanvas = (cdCtxCanvas *)malloc(sizeof(cdCtxCanvas));
+ memset(ctxcanvas, 0, sizeof(cdCtxCanvas));
+
+ ctxcanvas->cr = cr;
+ ctxcanvas->canvas = canvas;
+ ctxcanvas->last_source = -1;
+
+ canvas->ctxcanvas = ctxcanvas;
+ canvas->invert_yaxis = 1;
+
+ cdRegisterAttribute(canvas, &rotate_attrib);
+ cdRegisterAttribute(canvas, &version_attrib);
+ cdRegisterAttribute(canvas, &poly_attrib);
+ cdRegisterAttribute(canvas, &aa_attrib);
+ cdRegisterAttribute(canvas, &linegradient_attrib);
+ cdRegisterAttribute(canvas, &radialgradient_attrib);
+ cdRegisterAttribute(canvas, &interp_attrib);
+ cdRegisterAttribute(canvas, &cairodc_attrib);
+ cdRegisterAttribute(canvas, &hatchboxsize_attrib);
+
+ cairo_save(ctxcanvas->cr);
+ cairo_set_operator(ctxcanvas->cr, CAIRO_OPERATOR_OVER);
+
+ return ctxcanvas;
+}
+
+void cdcairoInitTable(cdCanvas* canvas)
+{
+ canvas->cxFlush = cdflush;
+ canvas->cxClear = cdclear;
+
+ canvas->cxPixel = cdpixel;
+
+ canvas->cxLine = cdline;
+ canvas->cxPoly = cdpoly;
+ canvas->cxRect = cdrect;
+ canvas->cxBox = cdbox;
+ canvas->cxArc = cdarc;
+ canvas->cxSector = cdsector;
+ canvas->cxChord = cdchord;
+ canvas->cxText = cdtext;
+
+ canvas->cxFLine = cdfline;
+ canvas->cxFPoly = cdfpoly;
+ canvas->cxFRect = cdfrect;
+ canvas->cxFBox = cdfbox;
+ canvas->cxFArc = cdfarc;
+ canvas->cxFSector = cdfsector;
+ canvas->cxFChord = cdfchord;
+ canvas->cxFText = cdftext;
+
+ canvas->cxClip = cdclip;
+ canvas->cxClipArea = cdcliparea;
+ canvas->cxLineStyle = cdlinestyle;
+ canvas->cxLineWidth = cdlinewidth;
+ canvas->cxLineCap = cdlinecap;
+ canvas->cxLineJoin = cdlinejoin;
+ canvas->cxInteriorStyle = cdinteriorstyle;
+ canvas->cxHatch = cdhatch;
+ canvas->cxStipple = cdstipple;
+ canvas->cxPattern = cdpattern;
+ canvas->cxFont = cdfont;
+ canvas->cxGetFontDim = cdgetfontdim;
+ canvas->cxGetTextSize = cdgettextsize;
+ canvas->cxTransform = cdtransform;
+ canvas->cxWriteMode = cdwritemode;
+ canvas->cxForeground = cdforeground;
+
+ canvas->cxGetImageRGB = cdgetimagergb;
+ canvas->cxScrollArea = cdscrollarea;
+
+ canvas->cxCreateImage = cdcreateimage;
+ canvas->cxGetImage = cdgetimage;
+ canvas->cxPutImageRect = cdputimagerect;
+ canvas->cxKillImage = cdkillimage;
+
+ canvas->cxPutImageRectRGB = cdputimagerectrgb;
+ canvas->cxPutImageRectMap = cdputimagerectmap;
+ canvas->cxPutImageRectRGBA = cdputimagerectrgba;
+}
+
+/*
+cairo_arc (cr, 128.0, 128.0, 76.8, 0, 2*M_PI);
+cairo_clip (cr);
+cairo_new_path (cr); // path not consumed by clip()
+*/
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-01 19:37:17 +0000