1 /*
2 * COPYRIGHT: See COPYING in the top level directory
3 * PROJECT: ReactOS Display Control Panel
4 * FILE: dll/cpl/desk/dibitmap.c
5 * PURPOSE: DIB loading
6 *
7 * PROGRAMMERS: Trevor McCort (lycan359@gmail.com)
8 */
9
10 #include "desk.h"
11
12 PDIBITMAP
DibLoadImage(LPTSTR lpFilename)13 DibLoadImage(LPTSTR lpFilename)
14 {
15 PDIBITMAP lpBitmap;
16 GpBitmap *bitmap;
17 BitmapData lock;
18
19 if (GdipCreateBitmapFromFile(lpFilename, &bitmap) != Ok)
20 {
21 return NULL;
22 }
23
24 lpBitmap = HeapAlloc(GetProcessHeap(), 0, sizeof(DIBITMAP));
25 if (lpBitmap == NULL)
26 {
27 GdipDisposeImage((GpImage*)bitmap);
28 return NULL;
29 }
30
31 lpBitmap->info = HeapAlloc(GetProcessHeap(), 0, sizeof(BITMAPINFO));
32 if (lpBitmap->info == NULL)
33 {
34 HeapFree(GetProcessHeap(), 0, lpBitmap);
35 GdipDisposeImage((GpImage*)bitmap);
36 return NULL;
37 }
38
39 if (GdipGetImageWidth((GpImage*)bitmap, &lpBitmap->width) != Ok ||
40 GdipGetImageHeight((GpImage*)bitmap, &lpBitmap->height) != Ok)
41 {
42 HeapFree(GetProcessHeap(), 0, lpBitmap->info);
43 HeapFree(GetProcessHeap(), 0, lpBitmap);
44 GdipDisposeImage((GpImage*)bitmap);
45 return NULL;
46 }
47
48 lpBitmap->bits = HeapAlloc(GetProcessHeap(), 0, lpBitmap->width * lpBitmap->height * 4);
49 if (!lpBitmap->bits)
50 {
51 HeapFree(GetProcessHeap(), 0, lpBitmap->info);
52 HeapFree(GetProcessHeap(), 0, lpBitmap);
53 GdipDisposeImage((GpImage*)bitmap);
54 return NULL;
55 }
56
57 ZeroMemory(lpBitmap->info, sizeof(BITMAPINFO));
58 lpBitmap->info->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
59 lpBitmap->info->bmiHeader.biWidth = lpBitmap->width;
60 lpBitmap->info->bmiHeader.biHeight = -(INT)lpBitmap->height;
61 lpBitmap->info->bmiHeader.biPlanes = 1;
62 lpBitmap->info->bmiHeader.biBitCount = 32;
63 lpBitmap->info->bmiHeader.biCompression = BI_RGB;
64 lpBitmap->info->bmiHeader.biSizeImage = lpBitmap->width * lpBitmap->height * 4;
65
66 lock.Width = lpBitmap->width;
67 lock.Height = lpBitmap->height;
68 lock.Stride = lpBitmap->width * 4;
69 lock.PixelFormat = PixelFormat32bppPARGB;
70 lock.Scan0 = lpBitmap->bits;
71 lock.Reserved = 0;
72
73 if (GdipBitmapLockBits(bitmap, NULL, ImageLockModeRead | ImageLockModeUserInputBuf, PixelFormat32bppPARGB, &lock) != Ok)
74 {
75 HeapFree(GetProcessHeap(), 0, lpBitmap->bits);
76 HeapFree(GetProcessHeap(), 0, lpBitmap->info);
77 HeapFree(GetProcessHeap(), 0, lpBitmap);
78 GdipDisposeImage((GpImage*)bitmap);
79 return NULL;
80 }
81
82 GdipBitmapUnlockBits(bitmap, &lock);
83 GdipDisposeImage((GpImage*)bitmap);
84
85 return lpBitmap;
86 }
87
88
89 VOID
DibFreeImage(PDIBITMAP lpBitmap)90 DibFreeImage(PDIBITMAP lpBitmap)
91 {
92 if (lpBitmap == NULL)
93 return;
94
95 /* Free the image data */
96 if (lpBitmap->bits != NULL)
97 HeapFree(GetProcessHeap(), 0, lpBitmap->bits);
98
99 /* Free the bitmap info */
100 if (lpBitmap->info != NULL)
101 HeapFree(GetProcessHeap(), 0, lpBitmap->info);
102
103 /* Free the bitmap structure */
104 if (lpBitmap != NULL)
105 HeapFree(GetProcessHeap(), 0, lpBitmap);
106 }
107