PlutoVG 1.0.0

11. marca je izšel prvi pomemben izid 1.0.0 knjižnice dvodimenzionalne vektorske grafike PlutoVG, napisan v jeziku C in razširjen pod MIT licenco. Knjižnica nima zunanjo odvisnosti.

Možnosti knjižnice:

• stil risanja črt;
• polnjenje z barvo, gradientom in teksturami;
• pisave in besedilo;
• izrezovanje in kompozicija;
• transformacije;
• slike.

Knjižnica se uporablja v drugih projektih avtorja: LunaSVG in PlutoSVG.

Spremembe:

• Uporaba SemVer za številčenje različic.
• Dodane so makro razlike PLUTOVG_EMPTY_POINT in PLUTOVG_EMPTY_RECT.

Koda:

#include <plutovg.h> int main(void) { const int width = 150; const int height = 150; const float center_x = width / 2.f; const float center_y = height / 2.f; const float face_radius = 70; const float mouth_radius = 50; const float eye_radius = 10; const float eye_offset_x = 25; const float eye_offset_y = 20; const float eye_x = center_x — eye_offset_x; const float eye_y = center_y — eye_offset_y; plutovg_surface_t* surface = plutovg_surface_create(width, height); plutovg_canvas_t* canvas = plutovg_canvas_create(surface); plutovg_canvas_save(canvas); plutovg_canvas_arc(canvas, center_x, center_y, face_radius, 0, PLUTOVG_TWO_PI, 0); plutovg_canvas_set_rgb(canvas, 1, 1, 0); plutovg_canvas_fill_preserve(canvas); plutovg_canvas_set_rgb(canvas, 0, 0, 0); plutovg_canvas_set_line_width(canvas, 5); plutovg_canvas_stroke(canvas); plutovg_canvas_restore(canvas); plutovg_canvas_save(canvas); plutovg_canvas_arc(canvas, eye_x, eye_y, eye_radius, 0, PLUTOVG_TWO_PI, 0); plutovg_canvas_arc(canvas, center_x + eye_offset_x, eye_y, eye_radius, 0, PLUTOVG_TWO_PI, 0); plutovg_canvas_set_rgb(canvas, 0, 0, 0); plutovg_canvas_fill(canvas); plutovg_canvas_restore(canvas); plutovg_canvas_save(canvas); plutovg_canvas_arc(canvas, center_x, center_y, mouth_radius, 0, PLUTOVG_PI, 0); plutovg_canvas_set_rgb(canvas, 0, 0, 0); plutovg_canvas_set_line_width(canvas, 5); plutovg_canvas_stroke(canvas); plutovg_canvas_restore(canvas); plutovg_surface_write_to_png(surface, "smiley.png"); plutovg_canvas_destroy(canvas); plutovg_surface_destroy(surface); return 0; }

nariše 😃 in ga shrani v datoteko smiley.png. 🙂

Izvor: linux.org.ru