mirror of
https://github.com/slint-ui/slint.git
synced 2025-09-29 13:24:48 +00:00
f912ec7e6b
The code was mixing logical and physical sizes, causing glyphs being doubly scaled down. Instead, this patch introduces: * Physical* and Logical* euclid length/size/rect aliases * some extraction traits for getting the scalars in rects/sizes as lengths (until euclid has them built-in) * wrapper traits/types for safely extracting the physical font metrics the compiler generates (i16) * Fix a bug in the text height calculation where we failed to take the descent into account
644 lines
24 KiB
Rust
644 lines
24 KiB
Rust
// Copyright © SixtyFPS GmbH <info@slint-ui.com>
|
|
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-commercial
|
|
|
|
use alloc::collections::VecDeque;
|
|
use alloc::rc::Rc;
|
|
use alloc::{vec, vec::Vec};
|
|
use core::pin::Pin;
|
|
|
|
use embedded_graphics::pixelcolor::Rgb888;
|
|
use embedded_graphics::prelude::*;
|
|
use i_slint_core::graphics::{FontRequest, IntRect, PixelFormat, Rect as RectF};
|
|
use i_slint_core::{Color, ImageInner};
|
|
|
|
use crate::fonts::FontMetrics;
|
|
use crate::{
|
|
Devices, LogicalItemGeometry, LogicalPoint, LogicalRect, PhysicalLength, PhysicalPoint,
|
|
PhysicalRect, PhysicalSize, PointLengths, RectLengths, ScaleFactor, SizeLengths,
|
|
};
|
|
|
|
use euclid::num::Zero;
|
|
|
|
pub fn render_window_frame(
|
|
runtime_window: Rc<i_slint_core::window::Window>,
|
|
background: Rgb888,
|
|
devices: &mut dyn Devices,
|
|
) {
|
|
let size = devices.screen_size();
|
|
let mut scene = prepare_scene(runtime_window, size);
|
|
|
|
/*for item in scene.future_items {
|
|
match item.command {
|
|
SceneCommand::Rectangle { color } => {
|
|
embedded_graphics::primitives::Rectangle {
|
|
top_left: Point { x: item.x as _, y: item.y as _ },
|
|
size: Size { width: item.width as _, height: item.height as _ },
|
|
}
|
|
.into_styled(
|
|
embedded_graphics::primitives::PrimitiveStyleBuilder::new()
|
|
.fill_color(Rgb888::new(color.red(), color.green(), color.blue()))
|
|
.build(),
|
|
)
|
|
.draw(display)
|
|
.unwrap();
|
|
}
|
|
SceneCommand::Texture { data, format, stride, source_width, source_height, color } => {
|
|
let sx = item.width as f32 / source_width as f32;
|
|
let sy = item.height as f32 / source_height as f32;
|
|
let bpp = bpp(format) as usize;
|
|
for y in 0..item.height {
|
|
let pixel_iter = (0..item.width).into_iter().map(|x| {
|
|
let pos = ((y as f32 / sy) as usize * stride as usize)
|
|
+ (x as f32 / sx) as usize * bpp;
|
|
to_color(&data[pos..], format, color)
|
|
});
|
|
|
|
display
|
|
.fill_contiguous(
|
|
&embedded_graphics::primitives::Rectangle::new(
|
|
Point::new(item.x as i32, (item.y + y) as i32),
|
|
Size::new(item.width as u32, 1),
|
|
),
|
|
pixel_iter,
|
|
)
|
|
.unwrap()
|
|
}
|
|
}
|
|
}
|
|
}*/
|
|
|
|
let mut line_buffer = vec![background; size.width as usize];
|
|
while scene.current_line < size.height_length() {
|
|
line_buffer.fill(background);
|
|
let line = scene.process_line();
|
|
for span in line.spans.iter().rev() {
|
|
match span.command {
|
|
SceneCommand::Rectangle => {
|
|
let color = scene.rectangles[span.data_index];
|
|
let alpha = color.alpha();
|
|
if alpha == u8::MAX {
|
|
line_buffer[span.x.get() as usize..(span.x + span.width).get() as usize]
|
|
.fill(to_rgb888_color_discard_alpha(color))
|
|
} else {
|
|
for pix in &mut line_buffer
|
|
[span.x.get() as usize..(span.x + span.width).get() as usize]
|
|
{
|
|
let a = (u8::MAX - alpha) as u16;
|
|
let b = alpha as u16;
|
|
*pix = Rgb888::new(
|
|
((pix.r() as u16 * a + color.red() as u16 * b) >> 8) as u8,
|
|
((pix.g() as u16 * a + color.green() as u16 * b) >> 8) as u8,
|
|
((pix.b() as u16 * a + color.blue() as u16 * b) >> 8) as u8,
|
|
);
|
|
}
|
|
}
|
|
}
|
|
SceneCommand::Texture => {
|
|
let SceneTexture { data, format, stride, source_width, source_height, color } =
|
|
scene.textures[span.data_index];
|
|
|
|
let sx = span.width.get() as f32 / source_width.get() as f32;
|
|
let sy = span.height.get() as f32 / source_height.get() as f32;
|
|
let bpp = bpp(format) as usize;
|
|
let y = line.line - span.y;
|
|
|
|
for (x, pix) in line_buffer
|
|
[(span.x).get() as usize..(span.x + span.width).get() as usize]
|
|
.iter_mut()
|
|
.enumerate()
|
|
{
|
|
let pos = ((y.get() as f32 / sy) as usize * stride as usize)
|
|
+ (x as f32 / sx) as usize * bpp;
|
|
*pix = match format {
|
|
PixelFormat::Rgb => {
|
|
Rgb888::new(data[pos + 0], data[pos + 1], data[pos + 2])
|
|
}
|
|
PixelFormat::Rgba => {
|
|
if color.alpha() == 0 {
|
|
let a = (u8::MAX - data[pos + 3]) as u16;
|
|
let b = data[pos + 3] as u16;
|
|
Rgb888::new(
|
|
((pix.r() as u16 * a + data[pos + 0] as u16 * b) >> 8)
|
|
as u8,
|
|
((pix.g() as u16 * a + data[pos + 1] as u16 * b) >> 8)
|
|
as u8,
|
|
((pix.b() as u16 * a + data[pos + 2] as u16 * b) >> 8)
|
|
as u8,
|
|
)
|
|
} else {
|
|
let a = (u8::MAX - data[pos + 3]) as u16;
|
|
let b = data[pos + 3] as u16;
|
|
Rgb888::new(
|
|
((pix.r() as u16 * a + color.red() as u16 * b) >> 8) as u8,
|
|
((pix.g() as u16 * a + color.green() as u16 * b) >> 8)
|
|
as u8,
|
|
((pix.b() as u16 * a + color.blue() as u16 * b) >> 8) as u8,
|
|
)
|
|
}
|
|
}
|
|
PixelFormat::AlphaMap => {
|
|
let a = (u8::MAX - data[pos]) as u16;
|
|
let b = data[pos] as u16;
|
|
Rgb888::new(
|
|
((pix.r() as u16 * a + color.red() as u16 * b) >> 8) as u8,
|
|
((pix.g() as u16 * a + color.green() as u16 * b) >> 8) as u8,
|
|
((pix.b() as u16 * a + color.blue() as u16 * b) >> 8) as u8,
|
|
)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
devices.fill_region(euclid::rect(0, line.line.get() as i16, size.width, 1), &line_buffer)
|
|
}
|
|
}
|
|
|
|
struct Scene {
|
|
/// the next line to be processed
|
|
current_line: PhysicalLength,
|
|
|
|
/// Element that have `y > current_line`
|
|
/// They must be sorted by `y` in reverse order (bottom to top)
|
|
/// then by `z` top to bottom
|
|
future_items: Vec<SceneItem>,
|
|
|
|
/// The items that overlap with the current line, sorted by z top to bottom
|
|
current_items: VecDeque<SceneItem>,
|
|
|
|
/// Some staging buffer of scene item
|
|
next_items: VecDeque<SceneItem>,
|
|
|
|
rectangles: Vec<Color>,
|
|
textures: Vec<SceneTexture>,
|
|
}
|
|
|
|
impl Scene {
|
|
fn new(mut items: Vec<SceneItem>, rectangles: Vec<Color>, textures: Vec<SceneTexture>) -> Self {
|
|
items.sort_unstable_by(|a, b| compare_scene_item(a, b).reverse());
|
|
Self {
|
|
future_items: items,
|
|
current_line: PhysicalLength::zero(),
|
|
current_items: Default::default(),
|
|
next_items: Default::default(),
|
|
rectangles,
|
|
textures,
|
|
}
|
|
}
|
|
|
|
/// Will generate a LineCommand for the current_line, remove all items that are done from the items
|
|
fn process_line(&mut self) -> LineCommand {
|
|
let mut command = vec![];
|
|
// Take the next element from current_items or future_items
|
|
loop {
|
|
let a_next_z =
|
|
self.future_items.last().filter(|i| i.y == self.current_line).map(|i| i.z);
|
|
let b_next_z = self.current_items.front().map(|i| i.z);
|
|
let item = match (a_next_z, b_next_z) {
|
|
(Some(a), Some(b)) => {
|
|
if a > b {
|
|
self.future_items.pop()
|
|
} else {
|
|
self.current_items.pop_front()
|
|
}
|
|
}
|
|
(Some(_), None) => self.future_items.pop(),
|
|
(None, Some(_)) => self.current_items.pop_front(),
|
|
_ => break,
|
|
};
|
|
let item = item.unwrap();
|
|
if item.y + item.height > self.current_line + PhysicalLength::new(1) {
|
|
self.next_items.push_back(item.clone());
|
|
}
|
|
command.push(item);
|
|
}
|
|
core::mem::swap(&mut self.next_items, &mut self.current_items);
|
|
let line = self.current_line;
|
|
self.current_line += PhysicalLength::new(1);
|
|
LineCommand { spans: command, line }
|
|
}
|
|
}
|
|
|
|
#[derive(Clone, Copy)]
|
|
struct SceneItem {
|
|
x: PhysicalLength,
|
|
y: PhysicalLength,
|
|
width: PhysicalLength,
|
|
height: PhysicalLength,
|
|
// this is the order of the item from which it is in the item tree
|
|
z: u16,
|
|
command: SceneCommand,
|
|
data_index: usize, // SceneCommand specific index in textures, etc. arrays for additional data
|
|
}
|
|
|
|
struct LineCommand {
|
|
line: PhysicalLength,
|
|
// Fixme: we need to process these so we do not draw items under opaque regions
|
|
spans: Vec<SceneItem>,
|
|
}
|
|
|
|
fn compare_scene_item(a: &SceneItem, b: &SceneItem) -> core::cmp::Ordering {
|
|
// First, order by line (top to bottom)
|
|
match a.y.partial_cmp(&b.y) {
|
|
None | Some(core::cmp::Ordering::Equal) => {}
|
|
Some(ord) => return ord,
|
|
}
|
|
// Then by the reverse z (front to back)
|
|
match a.z.partial_cmp(&b.z) {
|
|
None | Some(core::cmp::Ordering::Equal) => {}
|
|
Some(ord) => return ord.reverse(),
|
|
}
|
|
|
|
// anything else, we don't care
|
|
core::cmp::Ordering::Equal
|
|
}
|
|
|
|
#[derive(Clone, Copy)]
|
|
#[repr(u8)]
|
|
enum SceneCommand {
|
|
Rectangle,
|
|
Texture,
|
|
}
|
|
|
|
struct SceneTexture {
|
|
data: &'static [u8],
|
|
format: PixelFormat,
|
|
/// bytes between two lines in the source
|
|
stride: u16,
|
|
source_width: PhysicalLength,
|
|
source_height: PhysicalLength,
|
|
color: Color,
|
|
}
|
|
|
|
fn prepare_scene(runtime_window: Rc<i_slint_core::window::Window>, size: PhysicalSize) -> Scene {
|
|
let mut prepare_scene = PrepareScene::new(
|
|
size,
|
|
ScaleFactor::new(runtime_window.scale_factor()),
|
|
runtime_window.default_font_properties(),
|
|
);
|
|
runtime_window.draw_contents(|components| {
|
|
for (component, origin) in components {
|
|
i_slint_core::item_rendering::render_component_items(
|
|
component,
|
|
&mut prepare_scene,
|
|
origin.clone(),
|
|
);
|
|
}
|
|
});
|
|
Scene::new(prepare_scene.items, prepare_scene.rectangles, prepare_scene.textures)
|
|
}
|
|
|
|
struct PrepareScene {
|
|
items: Vec<SceneItem>,
|
|
rectangles: Vec<Color>,
|
|
textures: Vec<SceneTexture>,
|
|
state_stack: Vec<RenderState>,
|
|
current_state: RenderState,
|
|
scale_factor: ScaleFactor,
|
|
default_font: FontRequest,
|
|
}
|
|
|
|
impl PrepareScene {
|
|
fn new(size: PhysicalSize, scale_factor: ScaleFactor, default_font: FontRequest) -> Self {
|
|
Self {
|
|
items: vec![],
|
|
rectangles: vec![],
|
|
textures: vec![],
|
|
state_stack: vec![],
|
|
current_state: RenderState {
|
|
alpha: 1.,
|
|
offset: LogicalPoint::default(),
|
|
clip: LogicalRect::new(
|
|
LogicalPoint::default(),
|
|
size.cast() * scale_factor.inverse(),
|
|
),
|
|
},
|
|
scale_factor,
|
|
default_font,
|
|
}
|
|
}
|
|
|
|
fn should_draw(&self, rect: &LogicalRect) -> bool {
|
|
!rect.size.is_empty()
|
|
&& self.current_state.alpha > 0.01
|
|
&& self.current_state.clip.intersects(rect)
|
|
}
|
|
|
|
fn new_scene_rectangle(&mut self, geometry: LogicalRect, color: Color) {
|
|
self.rectangles.push(color);
|
|
self.new_scene_item(geometry, SceneCommand::Rectangle, self.rectangles.len() - 1);
|
|
}
|
|
|
|
fn new_scene_texture(&mut self, geometry: LogicalRect, texture: SceneTexture) {
|
|
self.textures.push(texture);
|
|
self.new_scene_item(geometry, SceneCommand::Texture, self.textures.len() - 1);
|
|
}
|
|
|
|
fn new_scene_item(&mut self, geometry: LogicalRect, command: SceneCommand, data_index: usize) {
|
|
let z = self.items.len() as u16;
|
|
|
|
self.items.push(SceneItem {
|
|
x: ((self.current_state.offset.x_length() + geometry.origin.x_length())
|
|
* self.scale_factor)
|
|
.cast(),
|
|
y: ((self.current_state.offset.y_length() + geometry.origin.y_length())
|
|
* self.scale_factor)
|
|
.cast(),
|
|
width: (geometry.size.width_length() * self.scale_factor).cast(),
|
|
height: (geometry.size.height_length() * self.scale_factor).cast(),
|
|
z,
|
|
command,
|
|
data_index,
|
|
});
|
|
}
|
|
|
|
fn draw_image_impl(
|
|
&mut self,
|
|
geom: LogicalRect,
|
|
source: &i_slint_core::graphics::Image,
|
|
source_clip: IntRect,
|
|
colorize: Color,
|
|
) {
|
|
let image_inner: &ImageInner = source.into();
|
|
match image_inner {
|
|
ImageInner::None => (),
|
|
ImageInner::AbsoluteFilePath(_) | ImageInner::EmbeddedData { .. } => {
|
|
unimplemented!()
|
|
}
|
|
ImageInner::EmbeddedImage(_) => todo!(),
|
|
ImageInner::StaticTextures { size, data, textures } => {
|
|
let sx = geom.width() / (size.width as f32);
|
|
let sy = geom.height() / (size.height as f32);
|
|
for t in textures.as_slice() {
|
|
if let Some(dest_rect) = t.rect.intersection(&source_clip).and_then(|r| {
|
|
r.intersection(
|
|
&self
|
|
.current_state
|
|
.clip
|
|
.to_untyped()
|
|
.scale(1. / sx, 1. / sy)
|
|
.round_in()
|
|
.cast(),
|
|
)
|
|
}) {
|
|
let actual_x = dest_rect.origin.x - t.rect.origin.x;
|
|
let actual_y = dest_rect.origin.y - t.rect.origin.y;
|
|
let stride = t.rect.width() as u16 * bpp(t.format);
|
|
self.new_scene_texture(
|
|
LogicalRect::from_untyped(&dest_rect.cast().scale(sx, sy)),
|
|
SceneTexture {
|
|
data: &data.as_slice()[(t.index
|
|
+ (stride as usize) * (actual_y as usize)
|
|
+ (bpp(t.format) as usize) * (actual_x as usize))..],
|
|
stride,
|
|
source_height: PhysicalLength::new(dest_rect.height() as i16),
|
|
source_width: PhysicalLength::new(dest_rect.width() as i16),
|
|
format: t.format,
|
|
color: if colorize.alpha() > 0 { colorize } else { t.color },
|
|
},
|
|
);
|
|
}
|
|
}
|
|
}
|
|
};
|
|
}
|
|
}
|
|
|
|
#[derive(Clone, Copy)]
|
|
struct RenderState {
|
|
alpha: f32,
|
|
offset: LogicalPoint,
|
|
clip: LogicalRect,
|
|
}
|
|
|
|
impl i_slint_core::item_rendering::ItemRenderer for PrepareScene {
|
|
fn draw_rectangle(&mut self, rect: Pin<&i_slint_core::items::Rectangle>) {
|
|
let geom = LogicalRect::new(LogicalPoint::default(), rect.logical_geometry().size_length());
|
|
if self.should_draw(&geom) {
|
|
let geom = match geom.intersection(&self.current_state.clip) {
|
|
Some(geom) => geom,
|
|
None => return,
|
|
};
|
|
|
|
// FIXME: gradients
|
|
let color = rect.background().color();
|
|
if color.alpha() == 0 {
|
|
return;
|
|
}
|
|
self.new_scene_rectangle(geom, color);
|
|
}
|
|
}
|
|
|
|
fn draw_border_rectangle(&mut self, rect: Pin<&i_slint_core::items::BorderRectangle>) {
|
|
let geom = LogicalRect::new(LogicalPoint::default(), rect.logical_geometry().size_length());
|
|
if self.should_draw(&geom) {
|
|
let border = rect.border_width();
|
|
// FIXME: gradients
|
|
let color = rect.background().color();
|
|
if color.alpha() > 0 {
|
|
if let Some(r) =
|
|
geom.inflate(-border, -border).intersection(&self.current_state.clip)
|
|
{
|
|
self.new_scene_rectangle(r, color);
|
|
}
|
|
}
|
|
if border > 0.01 {
|
|
// FIXME: radius
|
|
// FIXME: gradients
|
|
let border_color = rect.border_color().color();
|
|
if border_color.alpha() > 0 {
|
|
let mut add_border = |r: LogicalRect| {
|
|
if let Some(r) = r.intersection(&self.current_state.clip) {
|
|
self.new_scene_rectangle(r, border_color);
|
|
}
|
|
};
|
|
add_border(euclid::rect(0., 0., geom.width(), border));
|
|
add_border(euclid::rect(0., geom.height() - border, geom.width(), border));
|
|
add_border(euclid::rect(0., border, border, geom.height() - border - border));
|
|
add_border(euclid::rect(
|
|
geom.width() - border,
|
|
border,
|
|
border,
|
|
geom.height() - border - border,
|
|
));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fn draw_image(&mut self, image: Pin<&i_slint_core::items::ImageItem>) {
|
|
let geom =
|
|
LogicalRect::new(LogicalPoint::default(), image.logical_geometry().size_length());
|
|
if self.should_draw(&geom) {
|
|
self.draw_image_impl(
|
|
geom,
|
|
&image.source(),
|
|
euclid::rect(0, 0, i32::MAX, i32::MAX),
|
|
Default::default(),
|
|
);
|
|
}
|
|
}
|
|
|
|
fn draw_clipped_image(&mut self, image: Pin<&i_slint_core::items::ClippedImage>) {
|
|
// when the source_clip size is empty, make it full
|
|
let a = |v| if v == 0 { i32::MAX } else { v };
|
|
|
|
let geom =
|
|
LogicalRect::new(LogicalPoint::default(), image.logical_geometry().size_length());
|
|
if self.should_draw(&geom) {
|
|
self.draw_image_impl(
|
|
geom,
|
|
&image.source(),
|
|
euclid::rect(
|
|
image.source_clip_x(),
|
|
image.source_clip_y(),
|
|
a(image.source_clip_width()),
|
|
a(image.source_clip_height()),
|
|
),
|
|
image.colorize().color(),
|
|
);
|
|
}
|
|
}
|
|
|
|
fn draw_text(&mut self, text: Pin<&i_slint_core::items::Text>) {
|
|
let font_request = text.unresolved_font_request().merge(&self.default_font);
|
|
let (font, glyphs) = crate::fonts::match_font(&font_request, self.scale_factor);
|
|
|
|
let color = text.color().color();
|
|
|
|
let baseline_y = glyphs.ascent(font);
|
|
|
|
for (glyph_baseline_x, glyph) in crate::fonts::glyphs_for_text(font, glyphs, &text.text()) {
|
|
if let Some(dest_rect) = (PhysicalRect::new(
|
|
PhysicalPoint::from_lengths(
|
|
glyph_baseline_x + glyph.x(),
|
|
baseline_y - glyph.y() - glyph.height(),
|
|
),
|
|
glyph.size(),
|
|
)
|
|
.cast()
|
|
* self.scale_factor.inverse())
|
|
.intersection(&self.current_state.clip)
|
|
{
|
|
let stride = glyph.width().get() as u16;
|
|
|
|
self.new_scene_texture(
|
|
dest_rect,
|
|
SceneTexture {
|
|
data: glyph.data().as_slice(),
|
|
stride,
|
|
source_width: glyph.width(),
|
|
source_height: glyph.height(),
|
|
format: PixelFormat::AlphaMap,
|
|
color,
|
|
},
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
fn draw_text_input(&mut self, _text_input: Pin<&i_slint_core::items::TextInput>) {
|
|
// TODO
|
|
}
|
|
|
|
#[cfg(feature = "simulator")]
|
|
fn draw_path(&mut self, _path: Pin<&i_slint_core::items::Path>) {
|
|
// TODO
|
|
}
|
|
|
|
fn draw_box_shadow(&mut self, _box_shadow: Pin<&i_slint_core::items::BoxShadow>) {
|
|
// TODO
|
|
}
|
|
|
|
fn combine_clip(&mut self, other: RectF, _radius: f32, _border_width: f32) {
|
|
match self.current_state.clip.intersection(&LogicalRect::from_untyped(&other)) {
|
|
Some(r) => {
|
|
self.current_state.clip = r;
|
|
}
|
|
None => {
|
|
self.current_state.clip = LogicalRect::default();
|
|
}
|
|
};
|
|
// TODO: handle radius and border
|
|
}
|
|
|
|
fn get_current_clip(&self) -> i_slint_core::graphics::Rect {
|
|
self.current_state.clip.to_untyped()
|
|
}
|
|
|
|
fn translate(&mut self, x: f32, y: f32) {
|
|
self.current_state.offset.x += x;
|
|
self.current_state.offset.y += y;
|
|
self.current_state.clip = self.current_state.clip.translate((-x, -y).into())
|
|
}
|
|
|
|
fn rotate(&mut self, _angle_in_degrees: f32) {
|
|
todo!()
|
|
}
|
|
|
|
fn apply_opacity(&mut self, opacity: f32) {
|
|
self.current_state.alpha *= opacity;
|
|
}
|
|
|
|
fn save_state(&mut self) {
|
|
self.state_stack.push(self.current_state);
|
|
}
|
|
|
|
fn restore_state(&mut self) {
|
|
self.current_state = self.state_stack.pop().unwrap();
|
|
}
|
|
|
|
fn scale_factor(&self) -> f32 {
|
|
self.scale_factor.0
|
|
}
|
|
|
|
fn draw_cached_pixmap(
|
|
&mut self,
|
|
_item_cache: &i_slint_core::item_rendering::CachedRenderingData,
|
|
_update_fn: &dyn Fn(&mut dyn FnMut(u32, u32, &[u8])),
|
|
) {
|
|
todo!()
|
|
}
|
|
|
|
fn draw_string(&mut self, _string: &str, _color: Color) {
|
|
todo!()
|
|
}
|
|
|
|
fn window(&self) -> i_slint_core::window::WindowRc {
|
|
unreachable!("this backend don't query the window")
|
|
}
|
|
|
|
fn as_any(&mut self) -> &mut dyn core::any::Any {
|
|
self
|
|
}
|
|
}
|
|
|
|
/// bytes per pixels
|
|
fn bpp(format: PixelFormat) -> u16 {
|
|
match format {
|
|
PixelFormat::Rgb => 3,
|
|
PixelFormat::Rgba => 4,
|
|
PixelFormat::AlphaMap => 1,
|
|
}
|
|
}
|
|
/*
|
|
fn to_color(data: &[u8], format: PixelFormat, color: Color) -> Rgb888 {
|
|
match format {
|
|
PixelFormat::Rgba if color.alpha() > 0 => Rgb888::new(
|
|
((color.red() as u16 * data[3] as u16) >> 8) as u8,
|
|
((color.green() as u16 * data[3] as u16) >> 8) as u8,
|
|
((color.blue() as u16 * data[3] as u16) >> 8) as u8,
|
|
),
|
|
PixelFormat::Rgb => Rgb888::new(data[0], data[1], data[2]),
|
|
PixelFormat::Rgba => Rgb888::new(data[0], data[1], data[2]),
|
|
PixelFormat::AlphaMap => Rgb888::new(
|
|
((color.red() as u16 * data[0] as u16) >> 8) as u8,
|
|
((color.green() as u16 * data[0] as u16) >> 8) as u8,
|
|
((color.blue() as u16 * data[0] as u16) >> 8) as u8,
|
|
),
|
|
}
|
|
}*/
|
|
|
|
pub fn to_rgb888_color_discard_alpha(col: Color) -> Rgb888 {
|
|
Rgb888::new(col.red(), col.green(), col.blue())
|
|
}
|