376 lines
10 KiB
C
376 lines
10 KiB
C
#include <math.h>
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#ifdef ENABLE_CAIRO
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#include "ftk_cairo.h"
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static cairo_t* cr = NULL;
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static void paint_clip_image(int x, int y, int width, int height)
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{
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int w, h;
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cairo_surface_t *image;
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char filename[FTK_MAX_PATH+1] = {0};
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cairo_translate (cr, x, y);
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cairo_arc (cr, width/2, height/4, width/3, 0, 2*M_PI);
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cairo_clip (cr);
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cairo_new_path (cr); /* path not consumed by clip()*/
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ftk_snprintf(filename, FTK_MAX_PATH, "%s/png1.png",
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ftk_config_get_test_data_dir(ftk_default_config()));
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image = cairo_image_surface_create_from_png (filename);
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w = cairo_image_surface_get_width (image);
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h = cairo_image_surface_get_height (image);
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// cairo_scale (cr, 256.0/w, 256.0/h);
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cairo_set_source_surface (cr, image, 0, 0);
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cairo_paint (cr);
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cairo_surface_destroy (image);
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return;
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}
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static void paint_rect(int x, int y, int width, int height)
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{
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/* a custom shape that could be wrapped in a function */
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double x0 = 25.6, /* parameters like cairo_rectangle */
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y0 = 25.6,
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rect_width = 204.8,
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rect_height = 204.8,
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radius = 102.4; /* and an approximate curvature radius */
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double x1,y1;
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cairo_translate (cr, x, y);
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x1=x0+rect_width;
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y1=y0+rect_height;
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if (!rect_width || !rect_height)
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return;
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if (rect_width/2<radius) {
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if (rect_height/2<radius) {
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cairo_move_to (cr, x0, (y0 + y1)/2);
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cairo_curve_to (cr, x0 ,y0, x0, y0, (x0 + x1)/2, y0);
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cairo_curve_to (cr, x1, y0, x1, y0, x1, (y0 + y1)/2);
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cairo_curve_to (cr, x1, y1, x1, y1, (x1 + x0)/2, y1);
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cairo_curve_to (cr, x0, y1, x0, y1, x0, (y0 + y1)/2);
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} else {
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cairo_move_to (cr, x0, y0 + radius);
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cairo_curve_to (cr, x0 ,y0, x0, y0, (x0 + x1)/2, y0);
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cairo_curve_to (cr, x1, y0, x1, y0, x1, y0 + radius);
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cairo_line_to (cr, x1 , y1 - radius);
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cairo_curve_to (cr, x1, y1, x1, y1, (x1 + x0)/2, y1);
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cairo_curve_to (cr, x0, y1, x0, y1, x0, y1- radius);
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}
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} else {
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if (rect_height/2<radius) {
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cairo_move_to (cr, x0, (y0 + y1)/2);
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cairo_curve_to (cr, x0 , y0, x0 , y0, x0 + radius, y0);
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cairo_line_to (cr, x1 - radius, y0);
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cairo_curve_to (cr, x1, y0, x1, y0, x1, (y0 + y1)/2);
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cairo_curve_to (cr, x1, y1, x1, y1, x1 - radius, y1);
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cairo_line_to (cr, x0 + radius, y1);
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cairo_curve_to (cr, x0, y1, x0, y1, x0, (y0 + y1)/2);
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} else {
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cairo_move_to (cr, x0, y0 + radius);
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cairo_curve_to (cr, x0 , y0, x0 , y0, x0 + radius, y0);
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cairo_line_to (cr, x1 - radius, y0);
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cairo_curve_to (cr, x1, y0, x1, y0, x1, y0 + radius);
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cairo_line_to (cr, x1 , y1 - radius);
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cairo_curve_to (cr, x1, y1, x1, y1, x1 - radius, y1);
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cairo_line_to (cr, x0 + radius, y1);
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cairo_curve_to (cr, x0, y1, x0, y1, x0, y1- radius);
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}
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}
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cairo_close_path (cr);
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cairo_set_source_rgb (cr, 0.5, 0.5, 1);
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cairo_fill_preserve (cr);
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cairo_set_source_rgba (cr, 0.5, 0, 0, 0.5);
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cairo_set_line_width (cr, 10.0);
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cairo_stroke (cr);
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return;
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}
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static void paint_pic(int x, int y, int width, int height)
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{
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int w, h;
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cairo_surface_t *image;
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cairo_pattern_t *pattern;
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cairo_matrix_t matrix;
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char filename[FTK_MAX_PATH+1] = {0};
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cairo_translate (cr, x, y);
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ftk_snprintf(filename, FTK_MAX_PATH, "%s/png1.png",
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ftk_config_get_test_data_dir(ftk_default_config()));
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image = cairo_image_surface_create_from_png (filename);
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w = cairo_image_surface_get_width (image);
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h = cairo_image_surface_get_height (image);
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pattern = cairo_pattern_create_for_surface (image);
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cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
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cairo_translate (cr, 128.0, 128.0);
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cairo_rotate (cr, M_PI / 4);
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cairo_scale (cr, 1 / sqrt (2), 1 / sqrt (2));
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cairo_translate (cr, -128.0, -128.0);
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cairo_matrix_init_scale (&matrix, w/256.0 * 5.0, h/256.0 * 5.0);
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cairo_pattern_set_matrix (pattern, &matrix);
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cairo_set_source (cr, pattern);
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cairo_rectangle (cr, 0, 0, 256.0, 256.0);
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cairo_fill (cr);
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cairo_pattern_destroy (pattern);
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cairo_surface_destroy (image);
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return;
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}
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static void paint_arrow(int x, int y, int width, int height)
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{
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cairo_translate (cr, x, y);
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cairo_set_line_width (cr, 40.96);
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cairo_move_to (cr, 76.8, 84.48);
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cairo_rel_line_to (cr, 51.2, -51.2);
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cairo_rel_line_to (cr, 51.2, 51.2);
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cairo_set_line_join (cr, CAIRO_LINE_JOIN_MITER); /* default */
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cairo_stroke (cr);
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cairo_move_to (cr, 76.8, 161.28);
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cairo_rel_line_to (cr, 51.2, -51.2);
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cairo_rel_line_to (cr, 51.2, 51.2);
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cairo_set_line_join (cr, CAIRO_LINE_JOIN_BEVEL);
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cairo_stroke (cr);
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cairo_move_to (cr, 76.8, 238.08);
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cairo_rel_line_to (cr, 51.2, -51.2);
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cairo_rel_line_to (cr, 51.2, 51.2);
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cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
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cairo_stroke (cr);
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return;
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}
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static void paint_segments(int x, int y, int width, int height)
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{
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cairo_translate (cr, x, y);
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cairo_move_to (cr, 50.0, 75.0);
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cairo_line_to (cr, 200.0, 75.0);
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cairo_move_to (cr, 50.0, 125.0);
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cairo_line_to (cr, 200.0, 125.0);
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cairo_move_to (cr, 50.0, 175.0);
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cairo_line_to (cr, 200.0, 175.0);
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cairo_set_line_width (cr, 30.0);
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cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
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cairo_stroke (cr);
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return;
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}
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static void paint_ball(int x, int y, int width, int height)
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{
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cairo_pattern_t *pat;
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pat = cairo_pattern_create_linear (0.0, 0.0, 0.0, height);
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cairo_pattern_add_color_stop_rgba (pat, 1, 0, 0, 0, 1);
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cairo_pattern_add_color_stop_rgba (pat, 0, 1, 1, 1, 1);
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cairo_rectangle (cr, x, y, width, height);
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cairo_set_source (cr, pat);
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cairo_fill (cr);
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cairo_pattern_destroy (pat);
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pat = cairo_pattern_create_radial (x+115.2, y+102.4, 25.6,
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x+102.4, y+102.4, 128.0);
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cairo_pattern_add_color_stop_rgba (pat, 0, 1, 1, 1, 1);
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cairo_pattern_add_color_stop_rgba (pat, 1, 0, 0, 0, 1);
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cairo_set_source (cr, pat);
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cairo_arc (cr, x+width/2, y+height/4, 76.8, 0, 2 * M_PI);
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cairo_fill (cr);
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cairo_pattern_destroy (pat);
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return;
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}
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static void paint_helloworld(int x, int y, int width, int height)
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{
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cairo_select_font_face (cr, "Sans", CAIRO_FONT_SLANT_NORMAL,
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CAIRO_FONT_WEIGHT_BOLD);
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cairo_set_font_size (cr, 90.0);
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cairo_move_to (cr, x+10.0, y+135.0);
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cairo_show_text (cr, "Hello");
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cairo_move_to (cr, x+70.0, y+165.0);
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cairo_text_path (cr, "void");
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cairo_set_source_rgb (cr, 0.5, 0.5, 1);
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cairo_fill_preserve (cr);
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cairo_set_source_rgb (cr, 0, 0, 0);
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cairo_set_line_width (cr, 2.56);
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cairo_stroke (cr);
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/* draw helping lines */
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cairo_set_source_rgba (cr, 1, 0.2, 0.2, 0.6);
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cairo_arc (cr, x+10.0, y+135.0, 5.12, 0, 2*M_PI);
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cairo_close_path (cr);
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cairo_arc (cr, x+70.0, y+165.0, 5.12, 0, 2*M_PI);
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cairo_fill (cr);
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return;
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}
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static void paint_car(int x, int y, int width, int height)
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{
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cairo_set_line_width (cr, 6);
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cairo_rectangle (cr, x+10, y+10, width-20, 70);
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cairo_new_sub_path (cr); cairo_arc (cr, x+64, y+64, 40, 0, 2*M_PI);
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cairo_new_sub_path (cr); cairo_arc_negative (cr, width-64, y+64, 40, 0, -2*M_PI);
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cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
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cairo_set_source_rgb (cr, 0, 0.7, 0); cairo_fill_preserve (cr);
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cairo_set_source_rgb (cr, 0, 0, 0); cairo_stroke (cr);
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cairo_translate (cr, x, height/2);
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cairo_rectangle (cr, 10, 10, width-20, 70);
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cairo_new_sub_path (cr); cairo_arc (cr, 64, 64, 40, 0, 2*M_PI);
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cairo_new_sub_path (cr); cairo_arc_negative (cr, width-64, 64, 40, 0, -2*M_PI);
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cairo_set_fill_rule (cr, CAIRO_FILL_RULE_WINDING);
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cairo_set_source_rgb (cr, 0, 0, 0.9); cairo_fill_preserve (cr);
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cairo_set_source_rgb (cr, 0, 0, 0); cairo_stroke (cr);
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return;
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}
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typedef void (*PaintFunc)(int x, int y, int width, int height);
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static size_t g_index = 0;
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static const PaintFunc paints[] =
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{
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paint_car,
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paint_helloworld,
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paint_ball,
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paint_segments,
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paint_arrow,
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paint_pic,
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paint_rect,
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paint_clip_image
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};
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static Ret on_paint(void* ctx, void* obj)
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{
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FtkWidget* thiz = obj;
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FTK_BEGIN_PAINT(x, y, width, height, canvas);
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ftk_logd("%s:%d\n", __func__, __LINE__);
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if(cr == NULL)
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{
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cairo_surface_t* surface = ftk_cairo_surface_create(thiz);
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cr = cairo_create(surface);
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cairo_surface_destroy(surface);
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ftk_logd("%s:%d\n", __func__, __LINE__);
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}
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cairo_save (cr);
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cairo_reset_clip (cr);
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cairo_identity_matrix (cr);
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cairo_new_path (cr);
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cairo_rectangle(cr, x, y, width, height);
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cairo_clip (cr);
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ftk_logd("%s:%d\n", __func__, __LINE__);
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paints[g_index](x, y, width, height);
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ftk_logd("%s:%d\n", __func__, __LINE__);
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cairo_restore (cr);
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FTK_END_PAINT();
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ftk_logd("%s:%d\n", __func__, __LINE__);
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return RET_OK;
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}
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static Ret button_prev_clicked(void* ctx, void* obj)
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{
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g_index = g_index > 0 ? g_index - 1 : 0;
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ftk_widget_invalidate(ftk_widget_lookup(ctx, 100));
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return RET_OK;
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}
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static Ret button_next_clicked(void* ctx, void* obj)
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{
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g_index++;
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g_index = g_index % (sizeof(paints)/sizeof(paints[0]));
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ftk_widget_invalidate(ftk_widget_lookup(ctx, 100));
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return RET_OK;
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}
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static Ret button_quit_clicked(void* ctx, void* obj)
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{
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ftk_widget_unref(ctx);
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return RET_OK;
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}
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#ifdef FTK_AS_PLUGIN
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#include "ftk_app_demo.h"
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FTK_HIDE int FTK_MAIN(int argc, char* argv[]);
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FtkApp* ftk_app_demo_cairo_create()
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{
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return ftk_app_demo_create(_("cairo"), ftk_main);
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}
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#else
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#define FTK_HIDE extern
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#endif /*FTK_AS_PLUGIN*/
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FTK_HIDE int FTK_MAIN(int argc, char* argv[])
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{
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int width = 0;
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int height = 0;
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FtkWidget* win = NULL;
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FtkWidget* button = NULL;
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FtkWidget* painter = NULL;
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FTK_INIT(argc, argv);
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win = ftk_app_window_create();
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width = ftk_widget_width(win);
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height = ftk_widget_height(win);
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button = ftk_button_create(win, 0, 10, width/3, 60);
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ftk_widget_set_text(button, "prev");
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ftk_button_set_clicked_listener(button, button_prev_clicked, win);
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button = ftk_button_create(win, width/3, 10, width/3, 60);
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ftk_widget_set_text(button, "next");
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ftk_button_set_clicked_listener(button, button_next_clicked, win);
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button = ftk_button_create(win, width*2/3, 10, width/3, 60);
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ftk_widget_set_text(button, "quit");
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ftk_button_set_clicked_listener(button, button_quit_clicked, win);
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painter = ftk_painter_create(win, 0, 70, width, height);
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ftk_widget_set_id(painter, 100);
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ftk_painter_set_paint_listener(painter, on_paint, NULL);
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ftk_widget_set_text(win, "cairo demo");
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ftk_widget_show_all(win, 1);
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FTK_QUIT_WHEN_WIDGET_CLOSE(win);
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FTK_RUN();
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return 0;
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}
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#endif
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