diff options
Diffstat (limited to 'Userland/Libraries/LibGfx/Font/PathRasterizer.cpp')
| -rw-r--r-- | Userland/Libraries/LibGfx/Font/PathRasterizer.cpp | 84 |
1 files changed, 32 insertions, 52 deletions
diff --git a/Userland/Libraries/LibGfx/Font/PathRasterizer.cpp b/Userland/Libraries/LibGfx/Font/PathRasterizer.cpp index 5b30e02561..4eb56a398d 100644 --- a/Userland/Libraries/LibGfx/Font/PathRasterizer.cpp +++ b/Userland/Libraries/LibGfx/Font/PathRasterizer.cpp @@ -1,5 +1,6 @@ /* * Copyright (c) 2020, Srimanta Barua <srimanta.barua1@gmail.com> + * Copyright (c) 2023, Jelle Raaijmakers <jelle@gmta.nl> * * SPDX-License-Identifier: BSD-2-Clause */ @@ -11,10 +12,9 @@ namespace Gfx { PathRasterizer::PathRasterizer(Gfx::IntSize size) : m_size(size) { - m_data.resize(m_size.width() * m_size.height()); - for (int i = 0; i < m_size.width() * m_size.height(); i++) { - m_data[i] = 0.0f; - } + m_data.resize(m_size.area()); + for (int i = 0; i < m_size.area(); i++) + m_data[i] = 0.f; } void PathRasterizer::draw_path(Gfx::Path& path) @@ -31,17 +31,11 @@ RefPtr<Gfx::Bitmap> PathRasterizer::accumulate() auto bitmap = bitmap_or_error.release_value_but_fixme_should_propagate_errors(); Color base_color = Color::from_rgb(0xffffff); for (int y = 0; y < m_size.height(); y++) { - float accumulator = 0.0; + float accumulator = 0.f; for (int x = 0; x < m_size.width(); x++) { accumulator += m_data[y * m_size.width() + x]; - float value = accumulator; - if (value < 0.0f) { - value = -value; - } - if (value > 1.0f) { - value = 1.0; - } - u8 alpha = value * 255.0f; + float value = AK::min(AK::abs(accumulator), 1.f); + u8 alpha = value * 255.f; bitmap->set_pixel(x, y, base_color.with_alpha(alpha)); } } @@ -51,46 +45,38 @@ RefPtr<Gfx::Bitmap> PathRasterizer::accumulate() void PathRasterizer::draw_line(Gfx::FloatPoint p0, Gfx::FloatPoint p1) { // FIXME: Shift x and y according to dy/dx - if (p0.x() < 0.0f) { + if (p0.x() < 0.f) p0.set_x(roundf(p0.x())); - } - if (p0.y() < 0.0f) { + if (p0.y() < 0.f) p0.set_y(roundf(p0.y())); - } - if (p1.x() < 0.0f) { + if (p1.x() < 0.f) p1.set_x(roundf(p1.x())); - } - if (p1.y() < 0.0f) { + if (p1.y() < 0.f) p1.set_y(roundf(p1.y())); - } - if (!(p0.x() >= 0.0f && p0.y() >= 0.0f && p0.x() <= m_size.width() && p0.y() <= m_size.height())) { + if (p0.x() < 0.f || p0.y() < 0.f || p0.x() > m_size.width() || p0.y() > m_size.height()) { dbgln("!P0({},{})", p0.x(), p0.y()); return; } - if (!(p1.x() >= 0.0f && p1.y() >= 0.0f && p1.x() <= m_size.width() && p1.y() <= m_size.height())) { + if (p1.x() < 0.f || p1.y() < 0.f || p1.x() > m_size.width() || p1.y() > m_size.height()) { dbgln("!P1({},{})", p1.x(), p1.y()); return; } - VERIFY(p0.x() >= 0.0f && p0.y() >= 0.0f && p0.x() <= m_size.width() && p0.y() <= m_size.height()); - VERIFY(p1.x() >= 0.0f && p1.y() >= 0.0f && p1.x() <= m_size.width() && p1.y() <= m_size.height()); - // If we're on the same Y, there's no need to draw - if (p0.y() == p1.y()) { + if (p0.y() == p1.y()) return; - } - float direction = -1.0; + float direction = -1.f; if (p1.y() < p0.y()) { - direction = 1.0; - auto tmp = p0; - p0 = p1; - p1 = tmp; + direction = 1.f; + AK::swap(p0, p1); } - float dxdy = (p1.x() - p0.x()) / (p1.y() - p0.y()); + float const dxdy = (p1.x() - p0.x()) / (p1.y() - p0.y()); + float const dydx = AK::abs(1.f / dxdy); + u32 y0 = floorf(p0.y()); u32 y1 = ceilf(p1.y()); float x_cur = p0.x(); @@ -98,12 +84,10 @@ void PathRasterizer::draw_line(Gfx::FloatPoint p0, Gfx::FloatPoint p1) for (u32 y = y0; y < y1; y++) { u32 line_offset = m_size.width() * y; - float dy = min(y + 1.0f, p1.y()) - max((float)y, p0.y()); + float dy = AK::min(y + 1.f, p1.y()) - AK::max(static_cast<float>(y), p0.y()); float directed_dy = dy * direction; float x_next = x_cur + dy * dxdy; - if (x_next < 0.0f) { - x_next = 0.0f; - } + x_next = AK::max(x_next, 0.f); float x0 = x_cur; float x1 = x_next; if (x1 < x0) { @@ -112,27 +96,23 @@ void PathRasterizer::draw_line(Gfx::FloatPoint p0, Gfx::FloatPoint p1) } float x0_floor = floorf(x0); float x1_ceil = ceilf(x1); - u32 x0i = x0_floor; + u32 x0_floor_i = x0_floor; - if (x1_ceil <= x0_floor + 1.0f) { + if (x1_ceil <= x0_floor + 1.f) { // If x0 and x1 are within the same pixel, then area to the right is (1 - (mid(x0, x1) - x0_floor)) * dy - float area = ((x0 + x1) * 0.5f) - x0_floor; - m_data[line_offset + x0i] += directed_dy * (1.0f - area); - m_data[line_offset + x0i + 1] += directed_dy * area; + float area = .5f * (x0 + x1) - x0_floor; + m_data[line_offset + x0_floor_i] += directed_dy * (1.f - area); + m_data[line_offset + x0_floor_i + 1] += directed_dy * area; } else { - float dydx = 1.0f / dxdy; - if (dydx < 0) - dydx = -dydx; - - float x0_right = 1.0f - (x0 - x0_floor); + float x0_right = 1.f - (x0 - x0_floor); u32 x1_floor_i = floorf(x1); - float area_upto_here = 0.5f * x0_right * x0_right * dydx; - m_data[line_offset + x0i] += direction * area_upto_here; - for (u32 x = x0i + 1; x < x1_floor_i; x++) { + float area_upto_here = .5f * x0_right * x0_right * dydx; + m_data[line_offset + x0_floor_i] += direction * area_upto_here; + for (u32 x = x0_floor_i + 1; x < x1_floor_i; x++) { m_data[line_offset + x] += direction * dydx; area_upto_here += dydx; } - float remaining_area = (dy - area_upto_here); + float remaining_area = dy - area_upto_here; m_data[line_offset + x1_floor_i] += direction * remaining_area; } |