AuroraMiddleware/qt5base-lts
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Fix composition example during OpenGL resizes

Browse Source 
Previous images were sometimes not cleared correctly.

Change-Id: I62949b756bf797aa79c5160774f2f258e5c353dd
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
This commit is contained in:
Allan Sandfeld Jensen 2018-11-01 15:05:29 +01:00
parent d786c55b9e
commit 6d255b467b
1 changed files with 5 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
examples/widgets/painting/composition/composition.cpp
View File

@ -358,10 +358,10 @@ void CompositionRenderer::paint(QPainter *painter)
m_blitter.create();
int new_pbuf_size = m_pbuffer_size;
if (size().width() > m_pbuffer_size || size().height() > m_pbuffer_size)
while (size().width() > new_pbuf_size || size().height() > new_pbuf_size)
new_pbuf_size *= 2;
if (size().width() < m_pbuffer_size/2 && size().height() < m_pbuffer_size/2)
while (size().width() < new_pbuf_size/2 && size().height() < new_pbuf_size/2)
new_pbuf_size /= 2;
if (!m_fbo || new_pbuf_size != m_pbuffer_size) {
@ -372,6 +372,9 @@ void CompositionRenderer::paint(QPainter *painter)
if (size() != m_previous_size) {
m_previous_size = size();
QPainter p(m_fbo.data());
p.setCompositionMode(QPainter::CompositionMode_Source);
p.fillRect(QRect(QPoint(0, 0), size()), Qt::transparent);
p.setCompositionMode(QPainter::CompositionMode_SourceOver);
drawBase(p);
p.end();
m_base_tex = m_fbo->takeTexture();