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SharedGraphics: Make Painter clipping work with translated clip origin.

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This commit is contained in:
Andreas Kling 2019-02-28 18:57:36 +01:00
parent 8eefdbdce8
commit fd428d6ed3
6 changed files with 20 additions and 9 deletions
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15
SharedGraphics/Painter.cpp
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@ -14,11 +14,14 @@
#include <LibC/string.h>
#endif
#include <unistd.h>
Painter::Painter(GraphicsBitmap& bitmap)
: m_target(bitmap)
{
m_font = &Font::default_font();
m_clip_rect = { { 0, 0 }, bitmap.size() };
m_clip_origin = m_clip_rect;
}
#ifdef LIBGUI
@ -27,9 +30,10 @@ Painter::Painter(GWidget& widget)
, m_window(widget.window())
, m_target(*m_window->backing())
{
m_translation.move_by(widget.window_relative_rect().location());
// NOTE: m_clip_rect is in Window coordinates since we are painting into its backing store.
m_clip_rect = widget.window_relative_rect();
auto origin_rect = widget.window_relative_rect();
m_translation.move_by(origin_rect.location());
m_clip_rect = origin_rect;
m_clip_origin = origin_rect;
m_clip_rect.intersect(m_target->rect());
}
#endif
@ -446,10 +450,11 @@ void Painter::draw_focus_rect(const Rect& rect)
void Painter::set_clip_rect(const Rect& rect)
{
m_clip_rect = Rect::intersection(rect, m_target->rect());
m_clip_rect.intersect(rect.translated(m_clip_origin.location()));
m_clip_rect.intersect(m_target->rect());
}
void Painter::clear_clip_rect()
{
m_clip_rect = m_target->rect();
m_clip_rect = m_clip_origin;
}