gg: add the gg.Context.remove_cached_image_by_idx() method (#13206)

pull/13226/head
Wertzui123 2022-01-20 07:10:09 +01:00 committed by GitHub
parent ba3308296b
commit d67be6302b
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2 changed files with 45 additions and 0 deletions

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@ -38,6 +38,10 @@ pub fn (mut ctx Context) get_cached_image_by_idx(image_idx int) &Image {
return &ctx.image_cache[image_idx] return &ctx.image_cache[image_idx]
} }
pub fn (mut ctx Context) remove_cached_image_by_idx(image_idx int) {
ctx.image_cache.delete(image_idx)
}
// Draw part of an image using uv coordinates // Draw part of an image using uv coordinates
// img_rect is the size and position (in pixels on screen) of the displayed rectangle (ie the draw_image args) // img_rect is the size and position (in pixels on screen) of the displayed rectangle (ie the draw_image args)
// part_rect is the size and position (in absolute pixels in the image) of the wanted part // part_rect is the size and position (in absolute pixels in the image) of the wanted part

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@ -0,0 +1,41 @@
module main
import gg
import sokol.gfx
[console]
fn main() {
mut context := gg.new_context(
frame_fn: frame
width: 500
height: 500
)
context.run()
}
fn frame(mut ctx gg.Context) {
ctx.begin()
id := ctx.new_streaming_image(ctx.width, ctx.height, 4, pixel_format: .rgba8)
mut img := ctx.get_cached_image_by_idx(id)
mut bytes := []byte{len: img.width * img.height * 4, cap: img.width * img.height * 4}
for y in 0 .. img.height {
for x in 0 .. img.width {
unsafe {
bytes[(x + img.width * y) * 4] = 100
bytes[(x + img.width * y) * 4 + 1] = 100
bytes[(x + img.width * y) * 4 + 2] = 100
bytes[(x + img.width * y) * 4 + 3] = 255
}
}
}
unsafe {
img.update_pixel_data(&bytes[0])
}
ctx.draw_image(0, 0, ctx.width, ctx.height, img)
ctx.remove_cached_image_by_idx(id)
ctx.end()
gfx.destroy_image(img.simg)
unsafe {
free(&bytes[0])
}
}