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Display/hwcomposer:Add support for intermediate down scaling

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Copybit module has a limited stretch to up/down scale.
Hence we need to do a intermediate stretch before going
to final stretch.
CRs-fixed: 341196

Change-Id: Ic547fdb8e88072f9f89032f047d04a7a26bddf71
(cherry picked from commit 256bde19b8f912388e19390570e5ea36f0208cfe)
This commit is contained in:
Ramakant Singh 2012-03-08 18:33:50 +05:30 committed by andrew.boren
parent beb7795769
commit d80af4df03
1 changed files with 20 additions and 10 deletions
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30
libhwcomposer/hwcomposer.cpp
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@ -1383,6 +1383,7 @@ static int drawLayerUsingCopybit(hwc_composer_device_t *dev, hwc_layer_t *layer,
int32_t src_crop_height = sourceCrop.bottom -sourceCrop.top;
float copybitsMaxScale = (float)copybit->get(copybit,COPYBIT_MAGNIFICATION_LIMIT);
float copybitsMinScale = (float)copybit->get(copybit,COPYBIT_MINIFICATION_LIMIT);
if((layer->transform == HWC_TRANSFORM_ROT_90) ||
(layer->transform == HWC_TRANSFORM_ROT_270)) {
@ -1404,19 +1405,19 @@ static int drawLayerUsingCopybit(hwc_composer_device_t *dev, hwc_layer_t *layer,
float dsdx = (float)screen_w/src_crop_width;
float dtdy = (float)screen_h/src_crop_height;
int scaleLimit = copybitsMaxScale * copybitsMaxScale;
if(dsdx > scaleLimit || dtdy > scaleLimit) {
LOGE("%s: greater than max supported size ", __FUNCTION__ );
float scaleLimitMax = copybitsMaxScale * copybitsMaxScale;
float scaleLimitMin = copybitsMinScale * copybitsMinScale;
if(dsdx > scaleLimitMax || dtdy > scaleLimitMax || dsdx < 1/scaleLimitMin || dtdy < 1/scaleLimitMin) {
LOGE("%s: greater than max supported size dsdx=%f dtdy=%f scaleLimitMax=%f scaleLimitMin=%f", __FUNCTION__,dsdx,dtdy,scaleLimitMax,1/scaleLimitMin);
genlock_unlock_buffer(hnd);
return -1;
}
if(dsdx > copybitsMaxScale || dtdy > copybitsMaxScale){
if(dsdx > copybitsMaxScale || dtdy > copybitsMaxScale || dsdx < 1/copybitsMinScale || dtdy < 1/copybitsMinScale){
// The requested scale is out of the range the hardware
// can support.
LOGD("%s:%d::Need to scale twice dsdx=%f, dtdy=%f,maxScaleInv=%f,screen_w=%d,screen_h=%d \
LOGD("%s:%d::Need to scale twice dsdx=%f, dtdy=%f,copybitsMaxScale=%f,copybitsMinScale=%f,screen_w=%d,screen_h=%d \
src_crop_width=%d src_crop_height=%d",__FUNCTION__,__LINE__,
dsdx,dtdy,copybitsMaxScale,screen_w,screen_h,src_crop_width,src_crop_height);
dsdx,dtdy,copybitsMaxScale,1/copybitsMinScale,screen_w,screen_h,src_crop_width,src_crop_height);
//Driver makes width and height as even
//that may cause wrong calculation of the ratio
@ -1425,9 +1426,18 @@ static int drawLayerUsingCopybit(hwc_composer_device_t *dev, hwc_layer_t *layer,
src_crop_width = (src_crop_width/2)*2;
src_crop_height = (src_crop_height/2)*2;
int tmp_w = src_crop_width*copybitsMaxScale;
int tmp_h = src_crop_height*copybitsMaxScale;
int tmp_w = src_crop_width;
int tmp_h = src_crop_height;
if (dsdx > copybitsMaxScale || dtdy > copybitsMaxScale ){
tmp_w = src_crop_width*copybitsMaxScale;
tmp_h = src_crop_height*copybitsMaxScale;
}else if (dsdx < 1/copybitsMinScale ||dtdy < 1/copybitsMinScale ){
tmp_w = src_crop_width/copybitsMinScale;
tmp_h = src_crop_height/copybitsMinScale;
tmp_w = (tmp_w/2)*2;
tmp_h = (tmp_h/2)*2;
}
LOGD("%s:%d::tmp_w = %d,tmp_h = %d",__FUNCTION__,__LINE__,tmp_w,tmp_h);
int usage = GRALLOC_USAGE_PRIVATE_ADSP_HEAP |
@ -1485,7 +1495,7 @@ static int drawLayerUsingCopybit(hwc_composer_device_t *dev, hwc_layer_t *layer,
free_buffer(tmpHnd);
if(err < 0)
LOGE("copybit stretch failed");
LOGE("%s: copybit stretch failed",__FUNCTION__);
// Unlock this buffer since copybit is done with it.
err = genlock_unlock_buffer(hnd);