mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 09:22:44 +00:00
567 lines
20 KiB
C++
567 lines
20 KiB
C++
#include "Painter.h"
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#include "Font.h"
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#include "GraphicsBitmap.h"
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#include <SharedGraphics/CharacterBitmap.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 <unistd.h>
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#include <stdio.h>
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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;
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rect.move_by(state().translation);
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rect.intersect(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 unsigned dst_skip = m_target->width();
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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 (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;
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rect.move_by(state().translation);
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rect.intersect(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 unsigned dst_skip = m_target->width();
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for (int i = rect.height() - 1; i >= 0; --i) {
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fast_dword_fill(dst, color.value(), rect.width());
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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;
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rect.move_by(state().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 unsigned dst_skip = m_target->width();
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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;
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rect.move_by(state().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 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_dword_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_dword_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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Rect rect { p, bitmap.size() };
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rect.move_by(state().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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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->width();
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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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Rect dst_rect { p, bitmap.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 size_t dst_skip = m_target->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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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_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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byte 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->width();
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const unsigned src_skip = source.width();
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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 = 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->width();
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const unsigned src_skip = source.width();
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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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byte 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::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 = 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->width();
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const unsigned src_skip = source.width();
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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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byte 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 = Rect::intersection(src_rect, source.rect());
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ASSERT(source.rect().contains(safe_src_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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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->width();
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const unsigned src_skip = source.width();
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for (int row = first_row; row <= last_row; ++row) {
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fast_dword_copy(dst, src, clipped_rect.width());
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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_scaled_bitmap(const Rect& a_dst_rect, const GraphicsBitmap& source, const Rect& src_rect)
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{
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auto dst_rect = a_dst_rect;
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if (dst_rect.size() == src_rect.size())
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return blit(dst_rect.location(), source, src_rect);
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auto safe_src_rect = Rect::intersection(src_rect, source.rect());
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ASSERT(source.rect().contains(safe_src_rect));
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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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float hscale = (float)src_rect.width() / (float)dst_rect.width();
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float vscale = (float)src_rect.height() / (float)dst_rect.height();
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for (int y = dst_rect.top(); y <= dst_rect.bottom(); ++y) {
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if (y < clipped_rect.top() || y > clipped_rect.bottom())
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continue;
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auto* scanline = (Color*)m_target->scanline(y);
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for (int x = dst_rect.left(); x <= dst_rect.right(); ++x) {
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if (x < clipped_rect.left() || x >= clipped_rect.right())
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continue;
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auto scaled_x = (float)(x - dst_rect.x()) * hscale;
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auto scaled_y = (float)(y - dst_rect.y()) * vscale;
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auto src_pixel = Color::from_rgba(source.scanline((int)scaled_y)[(int)scaled_x]);
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if (!src_pixel.alpha())
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continue;
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if (src_pixel.alpha() == 0xff)
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scanline[x] = src_pixel;
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else
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scanline[x] = scanline[x].blend(scanline[x]);
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}
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}
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}
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[[gnu::flatten]] void Painter::draw_glyph(const Point& point, char ch, Color color)
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{
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draw_glyph(point, ch, font(), color);
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}
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[[gnu::flatten]] void Painter::draw_glyph(const Point& point, char ch, const Font& font, Color color)
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{
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draw_bitmap(point, font.glyph_bitmap(ch), color);
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}
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void Painter::draw_text(const Rect& rect, const char* text, int length, const Font& font, TextAlignment alignment, Color color, TextElision elision)
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{
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String elided_text;
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if (elision == TextElision::Right) {
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int text_width = font.width(text, length);
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if (font.width(text, length) > rect.width()) {
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int glyph_spacing = font.glyph_spacing();
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int new_length = 0;
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int new_width = font.width("...");
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if (new_width < text_width) {
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for (int i = 0; i < length; ++i) {
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int glyph_width = font.glyph_width(text[i]);
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// NOTE: Glyph spacing should not be added after the last glyph on the line,
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// but since we are here because the last glyph does not actually fit on the line,
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// we don't have to worry about spacing.
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int width_with_this_glyph_included = new_width + glyph_width + glyph_spacing;
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if (width_with_this_glyph_included > rect.width())
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break;
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++new_length;
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new_width += glyph_width + glyph_spacing;
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}
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StringBuilder builder;
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builder.append(text, new_length);
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builder.append("...");
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elided_text = builder.to_string();
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text = elided_text.characters();
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length = elided_text.length();
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}
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}
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}
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Point point;
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if (alignment == TextAlignment::TopLeft) {
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point = rect.location();
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} else if (alignment == TextAlignment::CenterLeft) {
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point = { rect.x(), rect.center().y() - (font.glyph_height() / 2) };
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} else if (alignment == TextAlignment::CenterRight) {
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int text_width = font.width(text);
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point = { rect.right() - text_width, rect.center().y() - (font.glyph_height() / 2) };
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} else if (alignment == TextAlignment::Center) {
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int text_width = font.width(text);
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point = rect.center();
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point.move_by(-(text_width / 2), -(font.glyph_height() / 2));
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} else {
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ASSERT_NOT_REACHED();
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}
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int space_width = font.glyph_width(' ') + font.glyph_spacing();
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for (ssize_t i = 0; i < length; ++i) {
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char ch = text[i];
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if (ch == ' ') {
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point.move_by(space_width, 0);
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continue;
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}
|
|
draw_glyph(point, ch, font, color);
|
|
point.move_by(font.glyph_width(ch) + font.glyph_spacing(), 0);
|
|
}
|
|
}
|
|
|
|
void Painter::draw_text(const Rect& rect, const String& text, TextAlignment alignment, Color color, TextElision elision)
|
|
{
|
|
draw_text(rect, text.characters(), text.length(), alignment, color, elision);
|
|
}
|
|
|
|
void Painter::draw_text(const Rect& rect, const String& text, const Font& font, TextAlignment alignment, Color color, TextElision elision)
|
|
{
|
|
draw_text(rect, text.characters(), text.length(), font, alignment, color, elision);
|
|
}
|
|
|
|
void Painter::draw_text(const Rect& rect, const char* text, int length, TextAlignment alignment, Color color, TextElision elision)
|
|
{
|
|
draw_text(rect, text, length, 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(dword& pixel, const Color& color)
|
|
{
|
|
if (draw_op() == DrawOp::Copy)
|
|
pixel = color.value();
|
|
else if (draw_op() == DrawOp::Xor)
|
|
pixel ^= color.value();
|
|
}
|
|
|
|
void Painter::draw_line(const Point& p1, const Point& p2, Color color)
|
|
{
|
|
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)
|
|
set_pixel_with_draw_op(m_target->scanline(y)[x], color);
|
|
return;
|
|
}
|
|
|
|
if (point1.x() > point2.x())
|
|
swap(point1, point2);
|
|
|
|
// 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());
|
|
auto* pixels = m_target->scanline(point1.y());
|
|
if (draw_op() == DrawOp::Copy) {
|
|
fast_dword_fill(pixels + min_x, color.value(), max_x - min_x + 1);
|
|
} else {
|
|
for (int x = min_x; x <= max_x; ++x)
|
|
set_pixel_with_draw_op(pixels[x], color);
|
|
}
|
|
return;
|
|
}
|
|
|
|
// FIXME: Implement clipping below.
|
|
ASSERT_NOT_REACHED();
|
|
|
|
#if 0
|
|
const double dx = point2.x() - point1.x();
|
|
const double dy = point2.y() - point1.y();
|
|
const double delta_error = fabs(dy / dx);
|
|
double error = 0;
|
|
const double y_step = dy == 0 ? 0 : (dy > 0 ? 1 : -1);
|
|
|
|
int y = point1.y();
|
|
for (int x = point1.x(); x <= point2.x(); ++x) {
|
|
m_target->scanline(y)[x] = color.value();
|
|
error += delta_error;
|
|
if (error >= 0.5) {
|
|
y = (double)y + y_step;
|
|
error -= 1.0;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void Painter::draw_focus_rect(const Rect& rect)
|
|
{
|
|
Rect focus_rect = rect;
|
|
focus_rect.move_by(1, 1);
|
|
focus_rect.set_width(focus_rect.width() - 2);
|
|
focus_rect.set_height(focus_rect.height() - 2);
|
|
draw_rect(focus_rect, Color::from_rgb(0x84351a));
|
|
}
|
|
|
|
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;
|
|
}
|