本文整理汇总了C++中Layer::Bitmap方法的典型用法代码示例。如果您正苦于以下问题：C++ Layer::Bitmap方法的具体用法？C++ Layer::Bitmap怎么用？C++ Layer::Bitmap使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Layer的用法示例。
在下文中一共展示了Layer::Bitmap方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: Layer
Layer*
Layer::readLayerOldStyle(BFile& file, ImageView* imageView, int32 new_id)
{
// // Layer has stored the following things:
// // 1. Layer frame (i.e. the frame of bitmap)
// // 2. Layer id
// // 3. Layer type
// // 4. Layer visibility
// // 5. Bitmap data
// //
BRect layer_frame;
if (file.Read(&layer_frame,sizeof(BRect)) != sizeof(BRect))
return NULL;
// The layer id is written to the file, so it must be read also, but it will
// not be used. Instead we use the id that is provided as a parameter
int32 id; // This is not actually used.
if (file.Read(&id,sizeof(uint32)) != sizeof(uint32))
return NULL;
id = B_BENDIAN_TO_HOST_INT32(id);
layer_type layerType;
if ((file.Read(&layerType, sizeof(uint32)) != sizeof(uint32)))
return NULL;
bool visi;
if (file.Read(&visi,sizeof(bool)) != sizeof(bool))
return NULL;
// Old files project-files are all big-endian so we convert data here.
layer_frame.left = B_BENDIAN_TO_HOST_FLOAT(layer_frame.left);
layer_frame.right = B_BENDIAN_TO_HOST_FLOAT(layer_frame.right);
layer_frame.top = B_BENDIAN_TO_HOST_FLOAT(layer_frame.top);
layer_frame.bottom = B_BENDIAN_TO_HOST_FLOAT(layer_frame.bottom);
layerType =layer_type(B_BENDIAN_TO_HOST_INT32(layerType));
if (layerType != HS_NORMAL_LAYER)
return NULL;
// Create the layer
Layer* layer = new Layer(layer_frame, new_id, imageView, layerType);
layer->SetVisibility(visi);
int8* bits = (int8*)layer->Bitmap()->Bits();
// align the file pointer to four-byte boundary.
int32 alignment_offset;
alignment_offset = (4 - (file.Position() % 4)) % 4;
if (file.Read(bits,alignment_offset) != alignment_offset) {
delete layer;
return NULL;
}
bits += alignment_offset;
if (file.Read(bits,layer->Bitmap()->BitsLength()-alignment_offset)
!= (layer->Bitmap()->BitsLength()-alignment_offset)) {
delete layer;
return NULL;
}
// Before returning calculate the layer's miniature image.
layer->calc_mini_image();
return layer;
}