1#include "BitmapDrawingEngine.h"
2#include "BitmapHWInterface.h"
3#include "ServerBitmap.h"
4#include <new>
5
6
7BitmapDrawingEngine::BitmapDrawingEngine(color_space colorSpace)
8	:	DrawingEngine(),
9		fColorSpace(colorSpace),
10		fHWInterface(NULL),
11		fBitmap(NULL)
12{
13}
14
15
16BitmapDrawingEngine::~BitmapDrawingEngine()
17{
18	SetSize(0, 0);
19}
20
21
22#if DEBUG
23bool
24BitmapDrawingEngine::IsParallelAccessLocked() const
25{
26	// We don't share the HWInterface instance that the Painter is
27	// attached to, so we never need to be locked.
28	return true;
29}
30#endif
31
32
33bool
34BitmapDrawingEngine::IsExclusiveAccessLocked() const
35{
36	// See IsParallelAccessLocked().
37	return true;
38}
39
40
41status_t
42BitmapDrawingEngine::SetSize(int32 newWidth, int32 newHeight)
43{
44	if (fBitmap != NULL && newWidth > 0 && newHeight > 0
45		&& fBitmap->Bounds().IntegerWidth() >= newWidth
46		&& fBitmap->Bounds().IntegerHeight() >= newHeight) {
47		return B_OK;
48	}
49
50	SetHWInterface(NULL);
51	if (fHWInterface.IsSet()) {
52		fHWInterface->LockExclusiveAccess();
53		fHWInterface->Shutdown();
54		fHWInterface->UnlockExclusiveAccess();
55		fHWInterface.Unset();
56	}
57
58	if (newWidth <= 0 || newHeight <= 0)
59		return B_OK;
60
61	fBitmap.SetTo(new(std::nothrow) UtilityBitmap(BRect(0, 0, newWidth - 1,
62		newHeight - 1), fColorSpace, 0));
63	if (!fBitmap.IsSet())
64		return B_NO_MEMORY;
65
66	fHWInterface.SetTo(new(std::nothrow) BitmapHWInterface(fBitmap));
67	if (!fHWInterface.IsSet())
68		return B_NO_MEMORY;
69
70	status_t result = fHWInterface->Initialize();
71	if (result != B_OK)
72		return result;
73
74	// we have to set a valid clipping first
75	fClipping.Set(fBitmap->Bounds());
76	ConstrainClippingRegion(&fClipping);
77	SetHWInterface(fHWInterface.Get());
78	return B_OK;
79}
80
81
82UtilityBitmap*
83BitmapDrawingEngine::ExportToBitmap(int32 width, int32 height,
84	color_space space)
85{
86	if (width <= 0 || height <= 0)
87		return NULL;
88
89	UtilityBitmap *result = new(std::nothrow) UtilityBitmap(BRect(0, 0,
90		width - 1, height - 1), space, 0);
91	if (result == NULL)
92		return NULL;
93
94	if (result->ImportBits(fBitmap->Bits(), fBitmap->BitsLength(),
95		fBitmap->BytesPerRow(), fBitmap->ColorSpace()) != B_OK) {
96		delete result;
97		return NULL;
98	}
99
100	return result;
101}
102