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Display/libhwcomposer:Add intermediate stretch for low resolution clips

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Copybit module has a limited stretch to scale a clip.
Hence we need to do a intermediate stretch before going
to final stretch.

(cherry picked from commit 6503d323f9e113c0edf66e724bb422559ecbd5cb)

Change-Id: Ib8ea9a917896985d4f7d7ebf999222f2dc6f6480
This commit is contained in:
Ramakant Singh 2012-01-20 13:16:08 +05:30 committed by Andrew Sutherland
parent 8ac7719437
commit 5cfdca4008
2 changed files with 73 additions and 2 deletions
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2
libhwcomposer/Android.mk
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@ -6,7 +6,7 @@ include $(CLEAR_VARS)
LOCAL_PRELINK_MODULE := false
LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw
LOCAL_SHARED_LIBRARIES := liblog libcutils libEGL libhardware libutils liboverlay
LOCAL_SHARED_LIBRARIES += libgenlock
LOCAL_SHARED_LIBRARIES += libgenlock libui
LOCAL_SRC_FILES := \
hwcomposer.cpp

73
libhwcomposer/hwcomposer.cpp
View File

@ -1045,11 +1045,82 @@ static int drawLayerUsingCopybit(hwc_composer_device_t *dev, hwc_layer_t *layer,
dst.base = (void *)fbHandle->base;
dst.handle = (native_handle_t *)renderBuffer->handle;
copybit_device_t *copybit = hwcModule->copybitEngine;
int32_t screen_w = displayFrame.right - displayFrame.left;
int32_t screen_h = displayFrame.bottom - displayFrame.top;
int32_t src_crop_width = sourceCrop.right - sourceCrop.left;
int32_t src_crop_height = sourceCrop.bottom -sourceCrop.top;
int32_t copybitsMaxScale = copybit->get(copybit,COPYBIT_MAGNIFICATION_LIMIT);
if(layer->transform & (HWC_TRANSFORM_ROT_90 | HWC_TRANSFORM_ROT_270)){
//swap screen width and height
int tmp = screen_w;
screen_w = screen_h;
screen_h = tmp;
}
int32_t dsdx = screen_w/src_crop_width;
int32_t dtdy = screen_h/src_crop_height;
sp<GraphicBuffer> tempBitmap;
if(dsdx > copybitsMaxScale || dtdy > copybitsMaxScale){
// The requested scale is out of the range the hardware
// can support.
LOGD("%s:%d::Need to scale dsdx=%d, dtdy=%d,maxScaleInv=%d,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);
//Driver makes width and height as even
//that may cause wrong calculation of the ratio
//in display and crop.Hence we make
//crop width and height as even.
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;
LOGD("%s:%d::tmp_w = %d,tmp_h = %d",__FUNCTION__,__LINE__,tmp_w,tmp_h);
tempBitmap = new GraphicBuffer(
tmp_w, tmp_h, src.format,
GraphicBuffer::USAGE_HW_2D);
err = tempBitmap->initCheck();
if (err == android::NO_ERROR){
copybit_image_t tmp_dst;
copybit_rect_t tmp_rect;
tmp_dst.w = tmp_w;
tmp_dst.h = tmp_h;
tmp_dst.format = tempBitmap->format;
tmp_dst.handle = (native_handle_t*)tempBitmap->getNativeBuffer()->handle;
tmp_dst.horiz_padding = src.horiz_padding;
tmp_dst.vert_padding = src.vert_padding;
tmp_rect.l = 0;
tmp_rect.t = 0;
tmp_rect.r = tmp_dst.w;
tmp_rect.b = tmp_dst.h;
//create one clip region
hwc_rect tmp_hwc_rect = {0,0,tmp_rect.r,tmp_rect.b};
hwc_region_t tmp_hwc_reg = {1,(hwc_rect_t const*)&tmp_hwc_rect};
region_iterator tmp_it(tmp_hwc_reg);
copybit->set_parameter(copybit,COPYBIT_TRANSFORM,0);
copybit->set_parameter(copybit, COPYBIT_PLANE_ALPHA,
(layer->blending == HWC_BLENDING_NONE) ? -1 : layer->alpha);
err = copybit->stretch(copybit,&tmp_dst, &src, &tmp_rect, &srcRect, &tmp_it);
if(err < 0){
LOGE("%s:%d::tmp copybit stretch failed",__FUNCTION__,__LINE__);
return err;
}
// copy new src and src rect crop
src = tmp_dst;
srcRect = tmp_rect;
}
}
// Copybit region
hwc_region_t region = layer->visibleRegionScreen;
region_iterator copybitRegion(region);
copybit_device_t *copybit = hwcModule->copybitEngine;
copybit->set_parameter(copybit, COPYBIT_FRAMEBUFFER_WIDTH, renderBuffer->width);
copybit->set_parameter(copybit, COPYBIT_FRAMEBUFFER_HEIGHT, renderBuffer->height);
copybit->set_parameter(copybit, COPYBIT_TRANSFORM, layer->transform);