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gg: add `rotate` to `DrawImageConfig` (#10521)

pull/10525/head
KJ Lawrence 2021-06-20 01:01:41 -04:00 committed by GitHub
parent 984551227b
commit 79879128b6
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1 changed files with 18 additions and 1 deletions
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19
vlib/gg/image.v
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@ -35,6 +35,7 @@ pub:
img_id int
img_rect Rect // defines the size and position on image when rendering to the screen
part_rect Rect // defines the size and position of part of the image to use when rendering
rotate int // amount to rotate the image in degrees
z f32
}
@ -221,6 +222,17 @@ pub fn (ctx &Context) draw_image_with_config(config DrawImageConfig) {
sgl.load_pipeline(ctx.timage_pip)
sgl.enable_texture()
sgl.texture(img.simg)
if config.rotate != 0 {
width := img_rect.width * ctx.scale
height := (if img_rect.height > 0 { img_rect.height } else { img.height }) * ctx.scale
sgl.push_matrix()
sgl.translate(x0 + (width / 2), y0 + (height / 2), 0)
sgl.rotate(sgl.rad(-config.rotate), 0, 0, 1)
sgl.translate(-x0 - (width / 2), -y0 - (height / 2), 0)
}
sgl.begin_quads()
sgl.c4b(255, 255, 255, 255)
sgl.v3f_t2f(x0, y0, config.z, u0f, v0f)
@ -228,6 +240,11 @@ pub fn (ctx &Context) draw_image_with_config(config DrawImageConfig) {
sgl.v3f_t2f(x1, y1, config.z, u1f, v1f)
sgl.v3f_t2f(x0, y1, config.z, u0f, v1f)
sgl.end()
if config.rotate != 0 {
sgl.pop_matrix()
}
sgl.disable_texture()
}
@ -280,7 +297,7 @@ pub fn (ctx &Context) draw_image_flipped(x f32, y f32, width f32, height f32, im
)
}
// draw_image_by_id draws an image based by an id
// draw_image_by_id draws an image by its id
pub fn (ctx &Context) draw_image_by_id(x f32, y f32, width f32, height f32, id int) {
ctx.draw_image_with_config(
img_id: id