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https://github.com/mudita/MuditaOS.git
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e6fdf0e22c
Changes draw command implementation to properly follow
command design pattern. All drawing commands have been
moved to separate inheriting draw commands from renderer.
Other changes:
- New draw methods overloads have been added to pixel renderer.
Now pixel rendering methods are in one class.
- Simplified draw commands naming.
- Changed variable naming in draw commands to be more verbose.
- Changed {x,y} pairs to Points where possible.
94 lines
3.1 KiB
C++
94 lines
3.1 KiB
C++
// Copyright (c) 2017-2021, Mudita Sp. z.o.o. All rights reserved.
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// For licensing, see https://github.com/mudita/MuditaOS/LICENSE.md
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#include "ArcRenderer.hpp"
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#include "PixelRenderer.hpp"
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namespace gui::renderer
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{
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constexpr Length RadiusPrecisionLimit = 5;
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auto ArcRenderer::DrawableStyle::from(const DrawArc &command) -> DrawableStyle
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{
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return DrawableStyle{command.width, command.borderColor};
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}
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void ArcRenderer::draw(Context *ctx,
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Point center,
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Length radius,
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trigonometry::Degrees begin,
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trigonometry::Degrees sweep,
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const DrawableStyle &style)
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{
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if (style.penWidth == 1) {
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draw(ctx, center, radius, begin, sweep, style.color);
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}
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else {
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draw(ctx, center, radius, begin, sweep, style.color, style.penWidth);
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}
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}
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void ArcRenderer::draw(Context *ctx,
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Point center,
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Length radius,
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trigonometry::Degrees begin,
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trigonometry::Degrees sweep,
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Color color,
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Length width)
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{
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if (width == 1) {
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draw(ctx, center, radius, begin, sweep, color);
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return;
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}
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const auto start = trigonometry::toRadians(begin);
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const auto end = trigonometry::toRadians(begin + sweep);
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double step;
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if (radius < RadiusPrecisionLimit) {
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step = 0.01;
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}
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else {
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step = 0.001;
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}
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double cosine, sine;
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for (double radians = start; radians <= end; radians += step) {
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cosine = std::cos(radians);
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sine = std::sin(radians);
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for (Length i = 0; i < width; ++i) {
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const auto r = radius - i;
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const auto x = trigonometry::AdjacentSide::fromCosine(cosine, r);
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const auto y = trigonometry::OppositeSide::fromSine(sine, r);
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PixelRenderer::draw(ctx, Point(center.x + x, center.y + y), color);
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}
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}
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}
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void ArcRenderer::draw(Context *ctx,
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Point center,
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Length radius,
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trigonometry::Degrees begin,
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trigonometry::Degrees sweep,
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Color color)
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{
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const auto start = trigonometry::toRadians(begin);
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const auto end = trigonometry::toRadians(begin + sweep);
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double step;
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if (radius < RadiusPrecisionLimit) {
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step = 0.01;
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}
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else {
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step = 0.001;
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}
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long int x, y;
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for (double radians = start; radians <= end; radians += step) {
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x = trigonometry::AdjacentSide::fromAngle(radians, radius);
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y = trigonometry::OppositeSide::fromAngle(radians, radius);
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PixelRenderer::draw(ctx, Point(center.x + x, center.y + y), color);
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}
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}
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} // namespace gui::renderer
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