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CCDraw: don't use clear screen for cleanup before gradient paint

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Until now clean up screen was required to avoid ghost paints with
hardware acceleration. But this causes partial flicker effects,
especially when new instances are created.
So it makes more sense to hold instances and use captured
screen instead blank screen.
Optional paint cache or clean up must be enabled.
You can enable/disable clean up with:
enableGradientBgCleanUp()/disableGradientBgCleanUp()
Paint cache:
enablePaintCache()/disablePaintCache()


Origin commit data
------------------
Branch: ni/coolstream
Commit: 8250d20fa7
Author: Thilo Graf <dbt@novatux.de>
Date: 2016-03-22 (Tue, 22 Mar 2016)



------------------
This commit was generated by Migit
This commit is contained in:
Thilo Graf
2016-03-22 08:40:14 +01:00
parent 3d0cf84664
commit 8c9bd16b1c
1 changed files with 20 additions and 6 deletions
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22
src/gui/components/cc_draw.cpp
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@@ -596,15 +596,29 @@ void CCDraw::paintFbItems(bool do_save_bg)
fbdata.gradient_data = getGradientData();
}
// if found empty gradient buffer, create it, otherwise paint from cache
// if found empty gradient buffer, create it, otherwise paint from gradient cache
if (fbdata.gradient_data->boxBuf == NULL){
if (!fbdata.pixbuf){
// on enabled clean up, paint blank screen before create gradient box, this prevents possible ghost text with hw acceleration
if (cc_gradient_bg_cleanup)
frameBuffer->paintBoxRel(fbdata.x, fbdata.y, fbdata.dx, fbdata.dy, 0, fbdata.r, fbdata.rtype);
if (fbdata.gradient_data->boxBuf == NULL){
dprintf(DEBUG_INFO, "\033[33m[CCDraw]\t[%s - %d], paint new gradient)...\033[0m\n", __func__, __LINE__);
// create gradient buffer and paint gradient box
fbdata.gradient_data->boxBuf = frameBuffer->paintBoxRel(fbdata.x, fbdata.y, fbdata.dx, fbdata.dy, 0, fbdata.gradient_data, fbdata.r, fbdata.rtype);
if (cc_paint_cache)
dprintf(DEBUG_INFO, "\033[33m[CCDraw]\t[%s - %d], paint and cache new gradient into gradient cache...\033[0m\n", __func__, __LINE__);
}
/* On enabled paint cache or clean up, catch the screen into paint cache and clean up unused gradient buffer.
* If we don't do this, gradient cache is used.
*/
if (cc_paint_cache || cc_gradient_bg_cleanup){
dprintf(DEBUG_INFO, "\033[33m[CCDraw]\t[%s - %d], cache new created gradient into external cache...\033[0m\n", __func__, __LINE__);
fbdata.pixbuf = getScreen(fbdata.x, fbdata.y, fbdata.dx, fbdata.dy);
if (clearFbGradientData())
dprintf(DEBUG_INFO, "\033[33m[CCDraw]\t[%s - %d], remove unused gradient data...\033[0m\n", __func__, __LINE__);
}
}else{
//use gradient cache to repaint gradient box
dprintf(DEBUG_INFO, "\033[33m[CCDraw]\t[%s - %d], paint cached gradient)...\033[0m\n", __func__, __LINE__);
frameBuffer->checkFbArea(fbdata.x, fbdata.y, fbdata.dx, fbdata.dy, true);
frameBuffer->blitBox2FB(fbdata.gradient_data->boxBuf, fbdata.gradient_data->dx, fbdata.dy, fbdata.gradient_data->x, fbdata.y);