gg: add draw_ellipse_filled() + draw_ellipse_empty() APIs (#12869)

pull/12885/head
Benjamin Stigsen 2021-12-17 20:19:18 +01:00 committed by GitHub
parent 08766da7e8
commit 75830f1fe3
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5 changed files with 105 additions and 0 deletions

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@ -70,6 +70,7 @@ const (
] ]
skip_on_musl = [ skip_on_musl = [
'vlib/v/tests/profile/profile_test.v', 'vlib/v/tests/profile/profile_test.v',
'vlib/gg/draw_fns_api_test.v',
] ]
skip_on_ubuntu_musl = [ skip_on_ubuntu_musl = [
//'vlib/v/gen/js/jsgen_test.v', //'vlib/v/gen/js/jsgen_test.v',

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@ -0,0 +1,24 @@
import os
fn test_all_samples_can_be_compiled() {
vexe := @VEXE
vroot := os.dir(vexe)
samples := os.walk_ext('$vroot/vlib/gg/testdata', '.vv')
mut fails := []string{}
for program_source in samples {
compile_cmd := '"$vexe" "$program_source"'
res := os.execute(compile_cmd)
if res.exit_code != 0 {
eprintln('>>> FAIL $compile_cmd')
fails << compile_cmd
}
println('OK $compile_cmd')
}
if fails.len > 0 {
eprintln('> Failed summary:')
for f in fails {
eprintln(' failed cmd: $f')
}
assert false
}
}

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@ -1029,3 +1029,38 @@ pub fn dpi_scale() f32 {
} }
return s return s
} }
// draw_ellipse_filled draws an opaque elipse, with a center at x,y , filled with the color `c`
pub fn (ctx &Context) draw_ellipse_filled(x f32, y f32, r_horizontal f32, r_vertical f32, c gx.Color) {
if c.a != 255 {
sgl.load_pipeline(ctx.timage_pip)
}
sgl.c4b(c.r, c.g, c.b, c.a)
sgl.begin_triangle_strip()
for i := 0; i < 360; i += 10 {
sgl.v2f(x, y)
sgl.v2f(x + math.sinf(f32(math.radians(i))) * r_horizontal, y +
math.cosf(f32(math.radians(i))) * r_vertical)
sgl.v2f(x + math.sinf(f32(math.radians(i + 10))) * r_horizontal, y +
math.cosf(f32(math.radians(i + 10))) * r_vertical)
}
sgl.end()
}
// draw_ellipse_empty draws the outline of an ellipse, with a center at x,y
pub fn (ctx &Context) draw_ellipse_empty(x f32, y f32, r_horizontal f32, r_vertical f32, c gx.Color) {
if c.a != 255 {
sgl.load_pipeline(ctx.timage_pip)
}
sgl.c4b(c.r, c.g, c.b, c.a)
sgl.begin_line_strip()
for i := 0; i < 360; i += 10 {
sgl.v2f(x + math.sinf(f32(math.radians(i))) * r_horizontal, y +
math.cosf(f32(math.radians(i))) * r_vertical)
sgl.v2f(x + math.sinf(f32(math.radians(i + 10))) * r_horizontal, y +
math.cosf(f32(math.radians(i + 10))) * r_vertical)
}
sgl.end()
}

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@ -0,0 +1,21 @@
module main
import gg
import gx
fn main() {
mut context := gg.new_context(
width: 200
height: 200
window_title: 'Elipses'
frame_fn: frame
)
context.run()
}
fn frame(mut ctx gg.Context) {
ctx.begin()
ctx.draw_ellipse_filled(100, 100, 100, 50, gx.red)
ctx.draw_ellipse_empty(100, 100, 50, 25, gx.black)
ctx.end()
}

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@ -0,0 +1,24 @@
module main
import gg
import gx
fn main() {
mut context := gg.new_context(
bg_color: gx.rgb(174, 198, 255)
width: 600
height: 400
window_title: 'Polygons'
frame_fn: frame
)
context.run()
}
fn frame(mut ctx gg.Context) {
ctx.begin()
ctx.draw_convex_poly([f32(100.0), 100.0, 200.0, 100.0, 300.0, 200.0, 200.0, 300.0, 100.0, 300.0],
gx.blue)
ctx.draw_empty_poly([f32(50.0), 50.0, 70.0, 60.0, 90.0, 80.0, 70.0, 110.0], gx.black)
ctx.draw_triangle(450, 142, 530, 280, 370, 280, gx.red)
ctx.end()
}