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package draw
import sg "shared:sokol/gfx"
Framebuffer :: struct {
img: sg.Image,
view: sg.View,
pipe: sg.Pipeline,
pass: sg.Pass,
}
init_framebuffer :: proc(
fb: ^Framebuffer,
width: i32,
height: i32,
clear_color := Color{0, 0, 0, 0},
) {
fb.pipe = sg.make_pipeline({
shader = sg.make_shader(default_shader_desc(sg.query_backend())),
layout = {
attrs = {
ATTR_default_vposition = {format = .FLOAT2},
ATTR_default_vuv = {format = .FLOAT2},
ATTR_default_vcolor = {format = .FLOAT4},
},
},
depth = {
pixel_format = .NONE,
},
sample_count = 1,
colors = {
0 = {
pixel_format = .RGBA8,
blend = {
enabled = true,
src_factor_rgb = .SRC_ALPHA,
dst_factor_rgb = .ONE_MINUS_SRC_ALPHA,
src_factor_alpha = .ONE,
dst_factor_alpha = .ZERO,
},
},
},
})
fb.img = sg.make_image({
usage = {
color_attachment = true,
},
width = width,
height = height,
pixel_format = .RGBA8,
sample_count = 1,
})
fb.view = sg.make_view({
texture = {
image = fb.img,
},
})
fb.pass = {
attachments = {
colors = {
0 = sg.make_view({
color_attachment = {
image = fb.img,
},
}),
},
},
action = {
colors = {
0 = {load_action = .CLEAR, clear_value = transmute(sg.Color)clear_color},
},
},
}
}
destroy_framebuffer :: proc(fb: ^Framebuffer) {
sg.destroy_pipeline(fb.pipe)
sg.destroy_view(fb.view)
sg.destroy_image(fb.img)
}
framebuffer_draw_start :: proc(fb: Framebuffer) {
sg.begin_pass(fb.pass)
sg.apply_pipeline(fb.pipe)
}
framebuffer_draw_end :: proc(fb: Framebuffer) {
sg.end_pass()
}
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