A small SVG library for simple graphics rendering and experiments.
Code below demonstrates how to draw the Snail logo:
#include "snail/snail.h"
void draw_logo(void) {
// create canvas
snl_canvas_t canvas = snl_canvas_create(512, 384);
snl_canvas_preallocate(&canvas, 2048);
// add gradient
snl_canvas_add_gradient_linear(
&canvas, "lg0",
SNL_COLOR(32, 183, 157, 255), // colorA
SNL_COLOR(152, 250, 174, 255), // colorB
0, 100, 100, 100, 0 // offsetA, offsetB, opacityA, opacityB, angle
);
// draw background
snl_canvas_render_rectangle(
&canvas,
SNL_POINT(0, 0),
SNL_POINT(canvas.width, canvas.height),
13,
SNL_APPEARANCE(1, 1, SNL_COLOR_PALEWHITE, 1, SNL_COLOR_PALEWHITE, NULL, NULL)
);
// draw snail body
snl_canvas_render_rectangle(
&canvas,
SNL_POINT(0.03*canvas.width, 2.055*canvas.height/3),
SNL_POINT(canvas.width*0.95, 0.9*canvas.height/3.2),
81,
SNL_APPEARANCE(21, 1, SNL_COLOR_NONE, 0, SNL_COLOR_NONE, NULL, "lg0")
);
// draw left eye
snl_canvas_render_rectangle(
&canvas,
SNL_POINT(3.5*canvas.width/5, 1.32*canvas.height/3),
SNL_POINT(0.07*canvas.width, 0.2*canvas.height),
81,
SNL_APPEARANCE(0, 1, SNL_COLOR_NONE, 1, SNL_COLOR_NONE, NULL, "lg0")
);
// draw right eye
snl_canvas_render_rectangle(
&canvas,
SNL_POINT(4*canvas.width/5, 1.32*canvas.height/3),
SNL_POINT(0.07*canvas.width, 0.2*canvas.height),
81,
SNL_APPEARANCE(0, 1, SNL_COLOR_NONE, 1, SNL_COLOR_NONE, NULL, "lg0")
);
// draw text 'made with'
snl_canvas_render_text_styled(
&canvas,
SNL_POINT(0.1*canvas.width, 4.3*canvas.height/5),
"made with",
SNL_APPEARANCE(0, 1, SNL_COLOR_NONE, 1, SNL_COLOR_NONE, NULL, "lg0"),
SNL_TEXT_STYLE(45, 0, SNL_FONT_GILL_SANS, SNL_FONT_WEIGHT_BOLD, SNL_FONT_STYLE_ITALIC, SNL_TEXT_NONE)
);
// draw text 'Snail'
snl_canvas_render_text_styled(
&canvas,
SNL_POINT(1.17*canvas.width/2, 4.35*canvas.height/5),
"Snail",
SNL_APPEARANCE(1, 1, SNL_COLOR_BLACK, 1, SNL_COLOR_NONE, NULL, "lg0"),
SNL_TEXT_STYLE(60, 0, SNL_FONT_LUMINARI, SNL_FONT_WEIGHT_BOLD, SNL_FONT_STYLE_NORMAL, SNL_TEXT_NONE)
);
// draw snail shell
const float circle_radius[3] = { 2.2*canvas.height/7, 1.4*canvas.height/7, 0.8*canvas.height/7 };
for (size_t i = 0; i < 3; i++) {
snl_canvas_render_circle(
&canvas, SNL_POINT(canvas.width/3, 2.5*canvas.height/7), circle_radius[i],
SNL_APPEARANCE(32, i == 2 ? 0 : 1, SNL_COLOR_NONE, i == 2 ? 1 : 0, SNL_COLOR_NONE, NULL, "lg0")
);
}
// save and destroy canvas
snl_canvas_save(&canvas, "../imgs/logo.svg");
snl_canvas_destroy(&canvas);
}This produces the SVG below:
$ ./build.sh # linux, macos
$ ./build.bat # windows
You will find the static library inside the lib/ folder.
Create a new project and copy over the neccessary files:
|- my_project
|- third_party
|- vita (from 'inc/' folder)
|- snail (from 'inc/' folder)
|- lib
|- libvita.a
|- libsnail.a
|- main.c
Vita can be found here. Then, to build the project, execute:
$ gcc main.c -o main -Ithird_party -Llib -lsnail -lvita
$ ./main
Check out the test Makefile for more details.
All code is licensed under the BSL license.