mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 15:42:44 +00:00
873 lines
33 KiB
C++
873 lines
33 KiB
C++
#include "Painter.h"
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#include "Emoji.h"
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#include "Font.h"
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#include "GraphicsBitmap.h"
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#include <AK/Assertions.h>
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#include <AK/StdLibExtras.h>
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#include <AK/StringBuilder.h>
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#include <AK/Utf8View.h>
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#include <LibDraw/CharacterBitmap.h>
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#include <math.h>
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#include <stdio.h>
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#include <unistd.h>
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#pragma GCC optimize("O3")
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template<GraphicsBitmap::Format format = GraphicsBitmap::Format::Invalid>
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static ALWAYS_INLINE Color get_pixel(const GraphicsBitmap& bitmap, int x, int y)
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{
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if constexpr (format == GraphicsBitmap::Format::Indexed8)
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return bitmap.palette_color(bitmap.bits(y)[x]);
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if constexpr (format == GraphicsBitmap::Format::RGB32)
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return Color::from_rgb(bitmap.scanline(y)[x]);
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if constexpr (format == GraphicsBitmap::Format::RGBA32)
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return Color::from_rgba(bitmap.scanline(y)[x]);
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return bitmap.get_pixel(x, y);
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}
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Painter::Painter(GraphicsBitmap& bitmap)
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: m_target(bitmap)
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{
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m_state_stack.append(State());
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state().font = &Font::default_font();
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state().clip_rect = { { 0, 0 }, bitmap.size() };
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m_clip_origin = state().clip_rect;
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}
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Painter::~Painter()
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{
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}
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void Painter::fill_rect_with_draw_op(const Rect& a_rect, Color color)
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{
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auto rect = a_rect.translated(translation()).intersected(clip_rect());
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if (rect.is_empty())
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return;
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RGBA32* dst = m_target->scanline(rect.top()) + rect.left();
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const size_t dst_skip = m_target->pitch() / sizeof(RGBA32);
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for (int i = rect.height() - 1; i >= 0; --i) {
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for (int j = 0; j < rect.width(); ++j)
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set_pixel_with_draw_op(dst[j], color);
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dst += dst_skip;
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}
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}
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void Painter::fill_rect(const Rect& a_rect, Color color)
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{
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if (color.alpha() == 0)
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return;
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if (draw_op() != DrawOp::Copy) {
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fill_rect_with_draw_op(a_rect, color);
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return;
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}
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auto rect = a_rect.translated(translation()).intersected(clip_rect());
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if (rect.is_empty())
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return;
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ASSERT(m_target->rect().contains(rect));
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RGBA32* dst = m_target->scanline(rect.top()) + rect.left();
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const size_t dst_skip = m_target->pitch() / sizeof(RGBA32);
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if (color.alpha() == 0xff) {
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for (int i = rect.height() - 1; i >= 0; --i) {
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fast_u32_fill(dst, color.value(), rect.width());
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dst += dst_skip;
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}
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return;
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}
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for (int i = rect.height() - 1; i >= 0; --i) {
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for (int j = 0; j < rect.width(); ++j)
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dst[j] = Color::from_rgba(dst[j]).blend(color).value();
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dst += dst_skip;
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}
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}
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void Painter::fill_rect_with_gradient(const Rect& a_rect, Color gradient_start, Color gradient_end)
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{
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#ifdef NO_FPU
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return fill_rect(a_rect, gradient_start);
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#endif
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auto rect = a_rect.translated(translation());
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auto clipped_rect = Rect::intersection(rect, clip_rect());
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if (clipped_rect.is_empty())
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return;
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int x_offset = clipped_rect.x() - rect.x();
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RGBA32* dst = m_target->scanline(clipped_rect.top()) + clipped_rect.left();
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const size_t dst_skip = m_target->pitch() / sizeof(RGBA32);
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float increment = (1.0 / ((rect.width()) / 255.0));
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int r2 = gradient_start.red();
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int g2 = gradient_start.green();
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int b2 = gradient_start.blue();
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int r1 = gradient_end.red();
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int g1 = gradient_end.green();
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int b1 = gradient_end.blue();
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for (int i = clipped_rect.height() - 1; i >= 0; --i) {
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float c = x_offset * increment;
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for (int j = 0; j < clipped_rect.width(); ++j) {
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dst[j] = Color(
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r1 / 255.0 * c + r2 / 255.0 * (255 - c),
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g1 / 255.0 * c + g2 / 255.0 * (255 - c),
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b1 / 255.0 * c + b2 / 255.0 * (255 - c))
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.value();
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c += increment;
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}
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dst += dst_skip;
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}
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}
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void Painter::draw_rect(const Rect& a_rect, Color color, bool rough)
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{
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Rect rect = a_rect.translated(translation());
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auto clipped_rect = rect.intersected(clip_rect());
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if (clipped_rect.is_empty())
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return;
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int min_y = clipped_rect.top();
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int max_y = clipped_rect.bottom();
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if (rect.top() >= clipped_rect.top() && rect.top() <= clipped_rect.bottom()) {
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int start_x = rough ? max(rect.x() + 1, clipped_rect.x()) : clipped_rect.x();
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int width = rough ? min(rect.width() - 2, clipped_rect.width()) : clipped_rect.width();
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fast_u32_fill(m_target->scanline(rect.top()) + start_x, color.value(), width);
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++min_y;
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}
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if (rect.bottom() >= clipped_rect.top() && rect.bottom() <= clipped_rect.bottom()) {
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int start_x = rough ? max(rect.x() + 1, clipped_rect.x()) : clipped_rect.x();
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int width = rough ? min(rect.width() - 2, clipped_rect.width()) : clipped_rect.width();
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fast_u32_fill(m_target->scanline(rect.bottom()) + start_x, color.value(), width);
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--max_y;
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}
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bool draw_left_side = rect.left() >= clipped_rect.left();
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bool draw_right_side = rect.right() == clipped_rect.right();
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if (draw_left_side && draw_right_side) {
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// Specialized loop when drawing both sides.
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for (int y = min_y; y <= max_y; ++y) {
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auto* bits = m_target->scanline(y);
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bits[rect.left()] = color.value();
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bits[rect.right()] = color.value();
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}
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} else {
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for (int y = min_y; y <= max_y; ++y) {
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auto* bits = m_target->scanline(y);
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if (draw_left_side)
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bits[rect.left()] = color.value();
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if (draw_right_side)
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bits[rect.right()] = color.value();
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}
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}
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}
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void Painter::draw_bitmap(const Point& p, const CharacterBitmap& bitmap, Color color)
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{
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auto rect = Rect(p, bitmap.size()).translated(translation());
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auto clipped_rect = rect.intersected(clip_rect());
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if (clipped_rect.is_empty())
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return;
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const int first_row = clipped_rect.top() - rect.top();
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const int last_row = clipped_rect.bottom() - rect.top();
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const int first_column = clipped_rect.left() - rect.left();
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const int last_column = clipped_rect.right() - rect.left();
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RGBA32* dst = m_target->scanline(clipped_rect.y()) + clipped_rect.x();
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const size_t dst_skip = m_target->pitch() / sizeof(RGBA32);
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const char* bitmap_row = &bitmap.bits()[first_row * bitmap.width() + first_column];
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const size_t bitmap_skip = bitmap.width();
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for (int row = first_row; row <= last_row; ++row) {
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for (int j = 0; j <= (last_column - first_column); ++j) {
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char fc = bitmap_row[j];
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if (fc == '#')
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dst[j] = color.value();
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}
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bitmap_row += bitmap_skip;
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dst += dst_skip;
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}
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}
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void Painter::draw_bitmap(const Point& p, const GlyphBitmap& bitmap, Color color)
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{
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auto dst_rect = Rect(p, bitmap.size()).translated(translation());
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auto clipped_rect = dst_rect.intersected(clip_rect());
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if (clipped_rect.is_empty())
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return;
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const int first_row = clipped_rect.top() - dst_rect.top();
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const int last_row = clipped_rect.bottom() - dst_rect.top();
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const int first_column = clipped_rect.left() - dst_rect.left();
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const int last_column = clipped_rect.right() - dst_rect.left();
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RGBA32* dst = m_target->scanline(clipped_rect.y()) + clipped_rect.x();
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const size_t dst_skip = m_target->pitch() / sizeof(RGBA32);
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for (int row = first_row; row <= last_row; ++row) {
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for (int j = 0; j <= (last_column - first_column); ++j) {
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if (bitmap.bit_at(j + first_column, row))
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dst[j] = color.value();
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}
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dst += dst_skip;
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}
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}
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void Painter::blit_scaled(const Rect& dst_rect_raw, const GraphicsBitmap& source, const Rect& src_rect, float hscale, float vscale)
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{
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auto dst_rect = Rect(dst_rect_raw.location(), dst_rect_raw.size()).translated(translation());
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auto clipped_rect = dst_rect.intersected(clip_rect());
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if (clipped_rect.is_empty())
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return;
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const int first_row = (clipped_rect.top() - dst_rect.top());
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const int last_row = (clipped_rect.bottom() - dst_rect.top());
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const int first_column = (clipped_rect.left() - dst_rect.left());
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RGBA32* dst = m_target->scanline(clipped_rect.y()) + clipped_rect.x();
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const size_t dst_skip = m_target->pitch() / sizeof(RGBA32);
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int x_start = first_column + src_rect.left();
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for (int row = first_row; row <= last_row; ++row) {
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int sr = (row + src_rect.top()) * vscale;
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if (sr >= source.size().height() || sr < 0) {
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dst += dst_skip;
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continue;
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}
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const RGBA32* sl = source.scanline(sr);
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for (int x = x_start; x < clipped_rect.width() + x_start; ++x) {
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int sx = x * hscale;
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if (sx < source.size().width() && sx >= 0)
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dst[x - x_start] = sl[sx];
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}
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dst += dst_skip;
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}
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return;
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}
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void Painter::blit_with_opacity(const Point& position, const GraphicsBitmap& source, const Rect& src_rect, float opacity)
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{
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ASSERT(!m_target->has_alpha_channel());
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if (!opacity)
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return;
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if (opacity >= 1.0f)
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return blit(position, source, src_rect);
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u8 alpha = 255 * opacity;
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Rect safe_src_rect = Rect::intersection(src_rect, source.rect());
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Rect dst_rect(position, safe_src_rect.size());
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dst_rect.move_by(state().translation);
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auto clipped_rect = Rect::intersection(dst_rect, clip_rect());
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if (clipped_rect.is_empty())
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return;
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const int first_row = clipped_rect.top() - dst_rect.top();
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const int last_row = clipped_rect.bottom() - dst_rect.top();
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const int first_column = clipped_rect.left() - dst_rect.left();
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const int last_column = clipped_rect.right() - dst_rect.left();
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RGBA32* dst = m_target->scanline(clipped_rect.y()) + clipped_rect.x();
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const RGBA32* src = source.scanline(src_rect.top() + first_row) + src_rect.left() + first_column;
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const size_t dst_skip = m_target->pitch() / sizeof(RGBA32);
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const unsigned src_skip = source.pitch() / sizeof(RGBA32);
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for (int row = first_row; row <= last_row; ++row) {
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for (int x = 0; x <= (last_column - first_column); ++x) {
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Color src_color_with_alpha = Color::from_rgb(src[x]);
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src_color_with_alpha.set_alpha(alpha);
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Color dst_color = Color::from_rgb(dst[x]);
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dst[x] = dst_color.blend(src_color_with_alpha).value();
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}
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dst += dst_skip;
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src += src_skip;
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}
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}
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void Painter::blit_dimmed(const Point& position, const GraphicsBitmap& source, const Rect& src_rect)
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{
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Rect safe_src_rect = src_rect.intersected(source.rect());
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auto dst_rect = Rect(position, safe_src_rect.size()).translated(translation());
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auto clipped_rect = dst_rect.intersected(clip_rect());
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if (clipped_rect.is_empty())
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return;
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const int first_row = clipped_rect.top() - dst_rect.top();
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const int last_row = clipped_rect.bottom() - dst_rect.top();
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const int first_column = clipped_rect.left() - dst_rect.left();
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const int last_column = clipped_rect.right() - dst_rect.left();
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RGBA32* dst = m_target->scanline(clipped_rect.y()) + clipped_rect.x();
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const RGBA32* src = source.scanline(src_rect.top() + first_row) + src_rect.left() + first_column;
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const size_t dst_skip = m_target->pitch() / sizeof(RGBA32);
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const size_t src_skip = source.pitch() / sizeof(RGBA32);
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for (int row = first_row; row <= last_row; ++row) {
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for (int x = 0; x <= (last_column - first_column); ++x) {
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u8 alpha = Color::from_rgba(src[x]).alpha();
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if (alpha == 0xff)
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dst[x] = Color::from_rgba(src[x]).to_grayscale().lightened().value();
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else if (!alpha)
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continue;
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else
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dst[x] = Color::from_rgba(dst[x]).blend(Color::from_rgba(src[x]).to_grayscale().lightened()).value();
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}
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dst += dst_skip;
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src += src_skip;
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}
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}
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void Painter::draw_tiled_bitmap(const Rect& a_dst_rect, const GraphicsBitmap& source)
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{
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auto dst_rect = a_dst_rect.translated(translation());
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auto clipped_rect = dst_rect.intersected(clip_rect());
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if (clipped_rect.is_empty())
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return;
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const int first_row = (clipped_rect.top() - dst_rect.top());
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const int last_row = (clipped_rect.bottom() - dst_rect.top());
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const int first_column = (clipped_rect.left() - dst_rect.left());
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RGBA32* dst = m_target->scanline(clipped_rect.y()) + clipped_rect.x();
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const size_t dst_skip = m_target->pitch() / sizeof(RGBA32);
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if (source.format() == GraphicsBitmap::Format::RGB32 || source.format() == GraphicsBitmap::Format::RGBA32) {
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int x_start = first_column + a_dst_rect.left();
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for (int row = first_row; row <= last_row; ++row) {
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const RGBA32* sl = source.scanline((row + a_dst_rect.top())
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% source.size().height());
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for (int x = x_start; x < clipped_rect.width() + x_start; ++x) {
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dst[x - x_start] = sl[x % source.size().width()];
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}
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dst += dst_skip;
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}
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return;
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}
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ASSERT_NOT_REACHED();
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}
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void Painter::blit_offset(const Point& position,
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const GraphicsBitmap& source,
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const Rect& src_rect,
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const Point& offset)
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{
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auto dst_rect = Rect(position, src_rect.size()).translated(translation());
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auto clipped_rect = dst_rect.intersected(clip_rect());
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if (clipped_rect.is_empty())
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return;
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const int first_row = (clipped_rect.top() - dst_rect.top());
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const int last_row = (clipped_rect.bottom() - dst_rect.top());
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const int first_column = (clipped_rect.left() - dst_rect.left());
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RGBA32* dst = m_target->scanline(clipped_rect.y()) + clipped_rect.x();
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const size_t dst_skip = m_target->pitch() / sizeof(RGBA32);
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if (source.format() == GraphicsBitmap::Format::RGB32 || source.format() == GraphicsBitmap::Format::RGBA32) {
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int x_start = first_column + src_rect.left();
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for (int row = first_row; row <= last_row; ++row) {
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int sr = row - offset.y() + src_rect.top();
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if (sr >= source.size().height() || sr < 0) {
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dst += dst_skip;
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continue;
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}
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const RGBA32* sl = source.scanline(sr);
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for (int x = x_start; x < clipped_rect.width() + x_start; ++x) {
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int sx = x - offset.x();
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if (sx < source.size().width() && sx >= 0)
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dst[x - x_start] = sl[sx];
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}
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dst += dst_skip;
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}
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return;
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}
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ASSERT_NOT_REACHED();
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}
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void Painter::blit_with_alpha(const Point& position, const GraphicsBitmap& source, const Rect& src_rect)
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{
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ASSERT(source.has_alpha_channel());
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Rect safe_src_rect = src_rect.intersected(source.rect());
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auto dst_rect = Rect(position, safe_src_rect.size()).translated(translation());
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auto clipped_rect = dst_rect.intersected(clip_rect());
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if (clipped_rect.is_empty())
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return;
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const int first_row = clipped_rect.top() - dst_rect.top();
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const int last_row = clipped_rect.bottom() - dst_rect.top();
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const int first_column = clipped_rect.left() - dst_rect.left();
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const int last_column = clipped_rect.right() - dst_rect.left();
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RGBA32* dst = m_target->scanline(clipped_rect.y()) + clipped_rect.x();
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const RGBA32* src = source.scanline(src_rect.top() + first_row) + src_rect.left() + first_column;
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const size_t dst_skip = m_target->pitch() / sizeof(RGBA32);
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const size_t src_skip = source.pitch() / sizeof(RGBA32);
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for (int row = first_row; row <= last_row; ++row) {
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for (int x = 0; x <= (last_column - first_column); ++x) {
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u8 alpha = Color::from_rgba(src[x]).alpha();
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if (alpha == 0xff)
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dst[x] = src[x];
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else if (!alpha)
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continue;
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else
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dst[x] = Color::from_rgba(dst[x]).blend(Color::from_rgba(src[x])).value();
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}
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dst += dst_skip;
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src += src_skip;
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}
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}
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void Painter::blit(const Point& position, const GraphicsBitmap& source, const Rect& src_rect, float opacity)
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{
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if (opacity < 1.0f)
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return blit_with_opacity(position, source, src_rect, opacity);
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if (source.has_alpha_channel())
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return blit_with_alpha(position, source, src_rect);
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auto safe_src_rect = src_rect.intersected(source.rect());
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ASSERT(source.rect().contains(safe_src_rect));
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|
auto dst_rect = Rect(position, safe_src_rect.size()).translated(translation());
|
|
auto clipped_rect = dst_rect.intersected(clip_rect());
|
|
if (clipped_rect.is_empty())
|
|
return;
|
|
const int first_row = clipped_rect.top() - dst_rect.top();
|
|
const int last_row = clipped_rect.bottom() - dst_rect.top();
|
|
const int first_column = clipped_rect.left() - dst_rect.left();
|
|
RGBA32* dst = m_target->scanline(clipped_rect.y()) + clipped_rect.x();
|
|
const size_t dst_skip = m_target->pitch() / sizeof(RGBA32);
|
|
|
|
if (source.format() == GraphicsBitmap::Format::RGB32 || source.format() == GraphicsBitmap::Format::RGBA32) {
|
|
const RGBA32* src = source.scanline(src_rect.top() + first_row) + src_rect.left() + first_column;
|
|
const size_t src_skip = source.pitch() / sizeof(RGBA32);
|
|
for (int row = first_row; row <= last_row; ++row) {
|
|
fast_u32_copy(dst, src, clipped_rect.width());
|
|
dst += dst_skip;
|
|
src += src_skip;
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (source.format() == GraphicsBitmap::Format::Indexed8) {
|
|
const u8* src = source.bits(src_rect.top() + first_row) + src_rect.left() + first_column;
|
|
const size_t src_skip = source.pitch();
|
|
for (int row = first_row; row <= last_row; ++row) {
|
|
for (int i = 0; i < clipped_rect.width(); ++i)
|
|
dst[i] = source.palette_color(src[i]).value();
|
|
dst += dst_skip;
|
|
src += src_skip;
|
|
}
|
|
return;
|
|
}
|
|
|
|
ASSERT_NOT_REACHED();
|
|
}
|
|
|
|
template<bool has_alpha_channel, typename GetPixel>
|
|
ALWAYS_INLINE static void do_draw_integer_scaled_bitmap(GraphicsBitmap& target, const Rect& dst_rect, const GraphicsBitmap& source, int hfactor, int vfactor, GetPixel get_pixel)
|
|
{
|
|
for (int y = source.rect().top(); y <= source.rect().bottom(); ++y) {
|
|
int dst_y = dst_rect.y() + y * vfactor;
|
|
for (int x = source.rect().left(); x <= source.rect().right(); ++x) {
|
|
auto src_pixel = get_pixel(source, x, y);
|
|
for (int yo = 0; yo < vfactor; ++yo) {
|
|
auto* scanline = (Color*)target.scanline(dst_y + yo);
|
|
int dst_x = dst_rect.x() + x * hfactor;
|
|
for (int xo = 0; xo < hfactor; ++xo) {
|
|
if constexpr (has_alpha_channel)
|
|
scanline[dst_x + xo] = scanline[dst_x + xo].blend(src_pixel);
|
|
else
|
|
scanline[dst_x + xo] = src_pixel;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
template<bool has_alpha_channel, typename GetPixel>
|
|
ALWAYS_INLINE static void do_draw_scaled_bitmap(GraphicsBitmap& target, const Rect& dst_rect, const Rect& clipped_rect, const GraphicsBitmap& source, const Rect& src_rect, int hscale, int vscale, GetPixel get_pixel)
|
|
{
|
|
if (dst_rect == clipped_rect && !(dst_rect.width() % src_rect.width()) && !(dst_rect.height() % src_rect.height())) {
|
|
int hfactor = dst_rect.width() / src_rect.width();
|
|
int vfactor = dst_rect.height() / src_rect.height();
|
|
if (hfactor == 2 && vfactor == 2)
|
|
return do_draw_integer_scaled_bitmap<has_alpha_channel>(target, dst_rect, source, 2, 2, get_pixel);
|
|
if (hfactor == 3 && vfactor == 3)
|
|
return do_draw_integer_scaled_bitmap<has_alpha_channel>(target, dst_rect, source, 3, 3, get_pixel);
|
|
if (hfactor == 4 && vfactor == 4)
|
|
return do_draw_integer_scaled_bitmap<has_alpha_channel>(target, dst_rect, source, 4, 4, get_pixel);
|
|
return do_draw_integer_scaled_bitmap<has_alpha_channel>(target, dst_rect, source, hfactor, vfactor, get_pixel);
|
|
}
|
|
|
|
for (int y = clipped_rect.top(); y <= clipped_rect.bottom(); ++y) {
|
|
auto* scanline = (Color*)target.scanline(y);
|
|
for (int x = clipped_rect.left(); x <= clipped_rect.right(); ++x) {
|
|
auto scaled_x = ((x - dst_rect.x()) * hscale) >> 16;
|
|
auto scaled_y = ((y - dst_rect.y()) * vscale) >> 16;
|
|
auto src_pixel = get_pixel(source, scaled_x, scaled_y);
|
|
|
|
if constexpr (has_alpha_channel) {
|
|
scanline[x] = scanline[x].blend(src_pixel);
|
|
} else
|
|
scanline[x] = src_pixel;
|
|
}
|
|
}
|
|
}
|
|
|
|
void Painter::draw_scaled_bitmap(const Rect& a_dst_rect, const GraphicsBitmap& source, const Rect& src_rect)
|
|
{
|
|
auto dst_rect = a_dst_rect;
|
|
if (dst_rect.size() == src_rect.size())
|
|
return blit(dst_rect.location(), source, src_rect);
|
|
|
|
auto safe_src_rect = src_rect.intersected(source.rect());
|
|
ASSERT(source.rect().contains(safe_src_rect));
|
|
dst_rect.move_by(state().translation);
|
|
auto clipped_rect = dst_rect.intersected(clip_rect());
|
|
if (clipped_rect.is_empty())
|
|
return;
|
|
|
|
int hscale = (src_rect.width() << 16) / dst_rect.width();
|
|
int vscale = (src_rect.height() << 16) / dst_rect.height();
|
|
|
|
if (source.has_alpha_channel()) {
|
|
switch (source.format()) {
|
|
case GraphicsBitmap::Format::RGB32:
|
|
do_draw_scaled_bitmap<true>(*m_target, dst_rect, clipped_rect, source, src_rect, hscale, vscale, get_pixel<GraphicsBitmap::Format::RGB32>);
|
|
break;
|
|
case GraphicsBitmap::Format::RGBA32:
|
|
do_draw_scaled_bitmap<true>(*m_target, dst_rect, clipped_rect, source, src_rect, hscale, vscale, get_pixel<GraphicsBitmap::Format::RGBA32>);
|
|
break;
|
|
case GraphicsBitmap::Format::Indexed8:
|
|
do_draw_scaled_bitmap<true>(*m_target, dst_rect, clipped_rect, source, src_rect, hscale, vscale, get_pixel<GraphicsBitmap::Format::Indexed8>);
|
|
break;
|
|
default:
|
|
do_draw_scaled_bitmap<true>(*m_target, dst_rect, clipped_rect, source, src_rect, hscale, vscale, get_pixel<GraphicsBitmap::Format::Invalid>);
|
|
break;
|
|
}
|
|
} else {
|
|
switch (source.format()) {
|
|
case GraphicsBitmap::Format::RGB32:
|
|
do_draw_scaled_bitmap<false>(*m_target, dst_rect, clipped_rect, source, src_rect, hscale, vscale, get_pixel<GraphicsBitmap::Format::RGB32>);
|
|
break;
|
|
case GraphicsBitmap::Format::RGBA32:
|
|
do_draw_scaled_bitmap<false>(*m_target, dst_rect, clipped_rect, source, src_rect, hscale, vscale, get_pixel<GraphicsBitmap::Format::RGBA32>);
|
|
break;
|
|
case GraphicsBitmap::Format::Indexed8:
|
|
do_draw_scaled_bitmap<false>(*m_target, dst_rect, clipped_rect, source, src_rect, hscale, vscale, get_pixel<GraphicsBitmap::Format::Indexed8>);
|
|
break;
|
|
default:
|
|
do_draw_scaled_bitmap<false>(*m_target, dst_rect, clipped_rect, source, src_rect, hscale, vscale, get_pixel<GraphicsBitmap::Format::Invalid>);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
[[gnu::flatten]] void Painter::draw_glyph(const Point& point, char ch, Color color)
|
|
{
|
|
draw_glyph(point, ch, font(), color);
|
|
}
|
|
|
|
[[gnu::flatten]] void Painter::draw_glyph(const Point& point, char ch, const Font& font, Color color)
|
|
{
|
|
draw_bitmap(point, font.glyph_bitmap(ch), color);
|
|
}
|
|
|
|
void Painter::draw_emoji(const Point& point, const GraphicsBitmap& emoji, const Font& font)
|
|
{
|
|
if (!font.is_fixed_width())
|
|
blit(point, emoji, emoji.rect());
|
|
else {
|
|
Rect dst_rect {
|
|
point.x(),
|
|
point.y(),
|
|
font.glyph_width('x'),
|
|
font.glyph_height()
|
|
};
|
|
draw_scaled_bitmap(dst_rect, emoji, emoji.rect());
|
|
}
|
|
}
|
|
|
|
void Painter::draw_glyph_or_emoji(const Point& point, u32 codepoint, const Font& font, Color color)
|
|
{
|
|
if (codepoint < 256) {
|
|
// This looks like a regular character.
|
|
draw_glyph(point, (char)codepoint, font, color);
|
|
return;
|
|
}
|
|
|
|
// Perhaps it's an emoji?
|
|
auto* emoji = Emoji::emoji_for_codepoint(codepoint);
|
|
if (emoji == nullptr) {
|
|
#ifdef EMOJI_DEBUG
|
|
dbg() << "Failed to find an emoji for codepoint " << codepoint;
|
|
#endif
|
|
draw_glyph(point, '?', font, color);
|
|
return;
|
|
}
|
|
|
|
draw_emoji(point, *emoji, font);
|
|
}
|
|
|
|
void Painter::draw_text_line(const Rect& a_rect, const Utf8View& text, const Font& font, TextAlignment alignment, Color color, TextElision elision)
|
|
{
|
|
auto rect = a_rect;
|
|
Utf8View final_text(text);
|
|
String elided_text;
|
|
if (elision == TextElision::Right) {
|
|
int text_width = font.width(final_text);
|
|
if (font.width(final_text) > rect.width()) {
|
|
int glyph_spacing = font.glyph_spacing();
|
|
int byte_offset = 0;
|
|
int new_width = font.width("...");
|
|
if (new_width < text_width) {
|
|
for (auto it = final_text.begin(); it != final_text.end(); ++it) {
|
|
u32 codepoint = *it;
|
|
int glyph_width = font.glyph_or_emoji_width(codepoint);
|
|
// NOTE: Glyph spacing should not be added after the last glyph on the line,
|
|
// but since we are here because the last glyph does not actually fit on the line,
|
|
// we don't have to worry about spacing.
|
|
int width_with_this_glyph_included = new_width + glyph_width + glyph_spacing;
|
|
if (width_with_this_glyph_included > rect.width())
|
|
break;
|
|
byte_offset = final_text.byte_offset_of(it);
|
|
new_width += glyph_width + glyph_spacing;
|
|
}
|
|
StringBuilder builder;
|
|
builder.append(final_text.substring_view(0, byte_offset).as_string());
|
|
builder.append("...");
|
|
elided_text = builder.to_string();
|
|
final_text = Utf8View { elided_text };
|
|
}
|
|
}
|
|
}
|
|
|
|
switch (alignment) {
|
|
case TextAlignment::TopLeft:
|
|
case TextAlignment::CenterLeft:
|
|
break;
|
|
case TextAlignment::TopRight:
|
|
case TextAlignment::CenterRight:
|
|
rect.set_x(rect.right() - font.width(final_text));
|
|
break;
|
|
case TextAlignment::Center: {
|
|
auto shrunken_rect = rect;
|
|
shrunken_rect.set_width(font.width(final_text));
|
|
shrunken_rect.center_within(rect);
|
|
rect = shrunken_rect;
|
|
break;
|
|
}
|
|
default:
|
|
ASSERT_NOT_REACHED();
|
|
}
|
|
|
|
auto point = rect.location();
|
|
int space_width = font.glyph_width(' ') + font.glyph_spacing();
|
|
|
|
for (u32 codepoint : final_text) {
|
|
if (codepoint == ' ') {
|
|
point.move_by(space_width, 0);
|
|
continue;
|
|
}
|
|
draw_glyph_or_emoji(point, codepoint, font, color);
|
|
point.move_by(font.glyph_or_emoji_width(codepoint) + font.glyph_spacing(), 0);
|
|
}
|
|
}
|
|
|
|
void Painter::draw_text(const Rect& rect, const StringView& text, TextAlignment alignment, Color color, TextElision elision)
|
|
{
|
|
draw_text(rect, text, font(), alignment, color, elision);
|
|
}
|
|
|
|
void Painter::draw_text(const Rect& rect, const StringView& raw_text, const Font& font, TextAlignment alignment, Color color, TextElision elision)
|
|
{
|
|
Utf8View text { raw_text };
|
|
Vector<Utf8View, 32> lines;
|
|
|
|
int start_of_current_line = 0;
|
|
for (auto it = text.begin(); it != text.end(); ++it) {
|
|
u32 codepoint = *it;
|
|
if (codepoint == '\n') {
|
|
int byte_offset = text.byte_offset_of(it);
|
|
Utf8View line = text.substring_view(start_of_current_line, byte_offset - start_of_current_line);
|
|
lines.append(line);
|
|
start_of_current_line = byte_offset + 1;
|
|
}
|
|
}
|
|
|
|
if (start_of_current_line != text.byte_length()) {
|
|
Utf8View line = text.substring_view(start_of_current_line, text.byte_length() - start_of_current_line);
|
|
lines.append(line);
|
|
}
|
|
|
|
static const int line_spacing = 4;
|
|
int line_height = font.glyph_height() + line_spacing;
|
|
Rect bounding_rect { 0, 0, 0, (lines.size() * line_height) - line_spacing };
|
|
|
|
for (auto& line : lines) {
|
|
auto line_width = font.width(line);
|
|
if (line_width > bounding_rect.width())
|
|
bounding_rect.set_width(line_width);
|
|
}
|
|
|
|
switch (alignment) {
|
|
case TextAlignment::TopLeft:
|
|
bounding_rect.set_location(rect.location());
|
|
break;
|
|
case TextAlignment::TopRight:
|
|
bounding_rect.set_location({ (rect.right() + 1) - bounding_rect.width(), rect.y() });
|
|
break;
|
|
case TextAlignment::CenterLeft:
|
|
bounding_rect.set_location({ rect.x(), rect.center().y() - (bounding_rect.height() / 2) });
|
|
break;
|
|
case TextAlignment::CenterRight:
|
|
bounding_rect.set_location({ (rect.right() + 1) - bounding_rect.width(), rect.center().y() - (bounding_rect.height() / 2) });
|
|
break;
|
|
case TextAlignment::Center:
|
|
bounding_rect.center_within(rect);
|
|
break;
|
|
default:
|
|
ASSERT_NOT_REACHED();
|
|
}
|
|
|
|
for (int i = 0; i < lines.size(); ++i) {
|
|
auto& line = lines[i];
|
|
Rect line_rect { bounding_rect.x(), bounding_rect.y() + i * line_height, bounding_rect.width(), line_height };
|
|
line_rect.intersect(rect);
|
|
draw_text_line(line_rect, line, font, alignment, color, elision);
|
|
}
|
|
}
|
|
|
|
void Painter::set_pixel(const Point& p, Color color)
|
|
{
|
|
auto point = p;
|
|
point.move_by(state().translation);
|
|
if (!clip_rect().contains(point))
|
|
return;
|
|
m_target->scanline(point.y())[point.x()] = color.value();
|
|
}
|
|
|
|
[[gnu::always_inline]] inline void Painter::set_pixel_with_draw_op(u32& pixel, const Color& color)
|
|
{
|
|
if (draw_op() == DrawOp::Copy)
|
|
pixel = color.value();
|
|
else if (draw_op() == DrawOp::Xor)
|
|
pixel ^= color.value();
|
|
}
|
|
|
|
void Painter::draw_pixel(const Point& position, Color color, int thickness)
|
|
{
|
|
ASSERT(draw_op() == DrawOp::Copy);
|
|
if (thickness == 1)
|
|
return set_pixel_with_draw_op(m_target->scanline(position.y())[position.x()], color);
|
|
Rect rect { position.translated(-(thickness / 2), -(thickness / 2)), { thickness, thickness } };
|
|
fill_rect(rect, color);
|
|
}
|
|
|
|
void Painter::draw_line(const Point& p1, const Point& p2, Color color, int thickness)
|
|
{
|
|
auto clip_rect = this->clip_rect();
|
|
|
|
auto point1 = p1;
|
|
point1.move_by(state().translation);
|
|
|
|
auto point2 = p2;
|
|
point2.move_by(state().translation);
|
|
|
|
// Special case: vertical line.
|
|
if (point1.x() == point2.x()) {
|
|
const int x = point1.x();
|
|
if (x < clip_rect.left() || x > clip_rect.right())
|
|
return;
|
|
if (point1.y() > point2.y())
|
|
swap(point1, point2);
|
|
if (point1.y() > clip_rect.bottom())
|
|
return;
|
|
if (point2.y() < clip_rect.top())
|
|
return;
|
|
int min_y = max(point1.y(), clip_rect.top());
|
|
int max_y = min(point2.y(), clip_rect.bottom());
|
|
for (int y = min_y; y <= max_y; ++y)
|
|
draw_pixel({ x, y }, color, thickness);
|
|
return;
|
|
}
|
|
|
|
// Special case: horizontal line.
|
|
if (point1.y() == point2.y()) {
|
|
const int y = point1.y();
|
|
if (y < clip_rect.top() || y > clip_rect.bottom())
|
|
return;
|
|
if (point1.x() > point2.x())
|
|
swap(point1, point2);
|
|
if (point1.x() > clip_rect.right())
|
|
return;
|
|
if (point2.x() < clip_rect.left())
|
|
return;
|
|
int min_x = max(point1.x(), clip_rect.left());
|
|
int max_x = min(point2.x(), clip_rect.right());
|
|
for (int x = min_x; x <= max_x; ++x)
|
|
draw_pixel({ x, y }, color, thickness);
|
|
return;
|
|
}
|
|
|
|
const double adx = abs(point2.x() - point1.x());
|
|
const double ady = abs(point2.y() - point1.y());
|
|
|
|
if (adx > ady) {
|
|
if (point1.x() > point2.x())
|
|
swap(point1, point2);
|
|
} else {
|
|
if (point1.y() > point2.y())
|
|
swap(point1, point2);
|
|
}
|
|
|
|
// FIXME: Implement clipping below.
|
|
const double dx = point2.x() - point1.x();
|
|
const double dy = point2.y() - point1.y();
|
|
double error = 0;
|
|
|
|
if (dx > dy) {
|
|
const double y_step = dy == 0 ? 0 : (dy > 0 ? 1 : -1);
|
|
const double delta_error = fabs(dy / dx);
|
|
int y = point1.y();
|
|
for (int x = point1.x(); x <= point2.x(); ++x) {
|
|
if (clip_rect.contains(x, y))
|
|
draw_pixel({ x, y }, color, thickness);
|
|
error += delta_error;
|
|
if (error >= 0.5) {
|
|
y = (double)y + y_step;
|
|
error -= 1.0;
|
|
}
|
|
}
|
|
} else {
|
|
const double x_step = dx == 0 ? 0 : (dx > 0 ? 1 : -1);
|
|
const double delta_error = fabs(dx / dy);
|
|
int x = point1.x();
|
|
for (int y = point1.y(); y <= point2.y(); ++y) {
|
|
if (clip_rect.contains(x, y))
|
|
draw_pixel({ x, y }, color, thickness);
|
|
error += delta_error;
|
|
if (error >= 0.5) {
|
|
x = (double)x + x_step;
|
|
error -= 1.0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void Painter::add_clip_rect(const Rect& rect)
|
|
{
|
|
state().clip_rect.intersect(rect.translated(m_clip_origin.location()));
|
|
state().clip_rect.intersect(m_target->rect());
|
|
}
|
|
|
|
void Painter::clear_clip_rect()
|
|
{
|
|
state().clip_rect = m_clip_origin;
|
|
}
|
|
|
|
PainterStateSaver::PainterStateSaver(Painter& painter)
|
|
: m_painter(painter)
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{
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m_painter.save();
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|
}
|
|
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PainterStateSaver::~PainterStateSaver()
|
|
{
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|
m_painter.restore();
|
|
}
|