RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-31 12:58:12 +00:00
Code Issues Activity Actions

centered backgrounds are now an option

Browse source
This commit is contained in:
Christopher Dumas 2019-05-26 20:10:23 -07:00 • committed by Andreas Kling
parent aa50e5bb13
commit da9c70598f
4 changed files with 45 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

37
SharedGraphics/Painter.cpp
View file

@ -301,6 +301,43 @@ void Painter::blit_tiled(const Point& position, const GraphicsBitmap& source, co
ASSERT_NOT_REACHED();
}
void Painter::blit_offset(const Point& position,
const GraphicsBitmap& source,
const Rect& src_rect,
const Point& offset)
{
auto dst_rect = Rect(position, 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) {
int x_start = first_column + src_rect.left();
for (int row = first_row; row <= last_row; ++row) {
int sr = row - offset.y() + src_rect.top();
if (sr >= source.size().height() || sr < 0) {
dst += dst_skip;
continue;
}
const RGBA32* sl = source.scanline(sr);
for (int x = x_start; x < clipped_rect.width() + x_start; ++x) {
int sx = x - offset.x();
if (sx < source.size().width() && sx >= 0)
dst[x - x_start] = sl[sx];
}
dst += dst_skip;
}
return;
}
ASSERT_NOT_REACHED();
}
void Painter::blit_with_alpha(const Point& position, const GraphicsBitmap& source, const Rect& src_rect)
{
ASSERT(source.has_alpha_channel());