Alexandre Julliard : comctl32: Add a couple of DIB helper functions for imagelists.
Module: wine Branch: master Commit: 4c785235d024883e9c97cef060a0ed808665306f URL: http://source.winehq.org/git/wine.git/?a=commit;h=4c785235d024883e9c97cef060... Author: Alexandre Julliard <julliard(a)winehq.org> Date: Tue Nov 15 22:10:45 2011 +0100 comctl32: Add a couple of DIB helper functions for imagelists. --- dlls/comctl32/imagelist.c | 119 ++++++++++++++++++++++++--------------------- 1 files changed, 64 insertions(+), 55 deletions(-) diff --git a/dlls/comctl32/imagelist.c b/dlls/comctl32/imagelist.c index accbf58..9d2b6f9 100644 --- a/dlls/comctl32/imagelist.c +++ b/dlls/comctl32/imagelist.c @@ -114,6 +114,17 @@ static inline void imagelist_get_bitmap_size( HIMAGELIST himl, UINT count, SIZE sz->cy = imagelist_height( count ) * himl->cy; } +static inline int get_dib_stride( int width, int bpp ) +{ + return ((width * bpp + 31) >> 3) & ~3; +} + +static inline int get_dib_image_size( const BITMAPINFO *info ) +{ + return get_dib_stride( info->bmiHeader.biWidth, info->bmiHeader.biBitCount ) + * abs( info->bmiHeader.biHeight ); +} + /* * imagelist_copy_images() * @@ -139,6 +150,56 @@ static inline void imagelist_copy_images( HIMAGELIST himl, HDC hdcSrc, HDC hdcDe } } +static void add_dib_bits( HIMAGELIST himl, int pos, int count, int width, int height, + BITMAPINFO *info, BITMAPINFO *mask_info, DWORD *bits, BYTE *mask_bits ) +{ + int i, j, n; + POINT pt; + int stride = info->bmiHeader.biWidth; + int mask_stride = (info->bmiHeader.biWidth + 31) / 32 * 4; + + for (n = 0; n < count; n++) + { + int has_alpha = 0; + + imagelist_point_from_index( himl, pos + n, &pt ); + + /* check if bitmap has an alpha channel */ + for (i = 0; i < height && !has_alpha; i++) + for (j = n * width; j < (n + 1) * width; j++) + if ((has_alpha = ((bits[i * stride + j] & 0xff000000) != 0))) break; + + if (!has_alpha) /* generate alpha channel from the mask */ + { + for (i = 0; i < height; i++) + for (j = n * width; j < (n + 1) * width; j++) + if (!mask_info || !((mask_bits[i * mask_stride + j / 8] << (j % 8)) & 0x80)) + bits[i * stride + j] |= 0xff000000; + else + bits[i * stride + j] = 0; + } + else + { + himl->has_alpha[pos + n] = 1; + + if (mask_info && himl->hbmMask) /* generate the mask from the alpha channel */ + { + for (i = 0; i < height; i++) + for (j = n * width; j < (n + 1) * width; j++) + if ((bits[i * stride + j] >> 24) > 25) /* more than 10% alpha */ + mask_bits[i * mask_stride + j / 8] &= ~(0x80 >> (j % 8)); + else + mask_bits[i * mask_stride + j / 8] |= 0x80 >> (j % 8); + } + } + StretchDIBits( himl->hdcImage, pt.x, pt.y, himl->cx, himl->cy, + n * width, 0, width, height, bits, info, DIB_RGB_COLORS, SRCCOPY ); + if (mask_info) + StretchDIBits( himl->hdcMask, pt.x, pt.y, himl->cx, himl->cy, + n * width, 0, width, height, mask_bits, mask_info, DIB_RGB_COLORS, SRCCOPY ); + } +} + /* add images with an alpha channel when the image list is 32 bpp */ static BOOL add_with_alpha( HIMAGELIST himl, HDC hdc, int pos, int count, int width, int height, HBITMAP hbmImage, HBITMAP hbmMask ) @@ -148,8 +209,6 @@ static BOOL add_with_alpha( HIMAGELIST himl, HDC hdc, int pos, int count, BITMAPINFO *info, *mask_info = NULL; DWORD *bits = NULL; BYTE *mask_bits = NULL; - int i, j, n; - POINT pt; DWORD mask_width; if (!GetObjectW( hbmImage, sizeof(bm), &bm )) return FALSE; @@ -188,46 +247,7 @@ static BOOL add_with_alpha( HIMAGELIST himl, HDC hdc, int pos, int count, if (!GetDIBits( hdc, hbmMask, 0, height, mask_bits, mask_info, DIB_RGB_COLORS )) goto done; } - for (n = 0; n < count; n++) - { - int has_alpha = 0; - - imagelist_point_from_index( himl, pos + n, &pt ); - - /* check if bitmap has an alpha channel */ - for (i = 0; i < height && !has_alpha; i++) - for (j = n * width; j < (n + 1) * width; j++) - if ((has_alpha = ((bits[i * bm.bmWidth + j] & 0xff000000) != 0))) break; - - if (!has_alpha) /* generate alpha channel from the mask */ - { - for (i = 0; i < height; i++) - for (j = n * width; j < (n + 1) * width; j++) - if (!mask_bits || !((mask_bits[i * mask_width + j / 8] << (j % 8)) & 0x80)) - bits[i * bm.bmWidth + j] |= 0xff000000; - else - bits[i * bm.bmWidth + j] = 0; - } - else - { - himl->has_alpha[pos + n] = 1; - - if (mask_info && himl->hbmMask) /* generate the mask from the alpha channel */ - { - for (i = 0; i < height; i++) - for (j = n * width; j < (n + 1) * width; j++) - if ((bits[i * bm.bmWidth + j] >> 24) > 25) /* more than 10% alpha */ - mask_bits[i * mask_width + j / 8] &= ~(0x80 >> (j % 8)); - else - mask_bits[i * mask_width + j / 8] |= 0x80 >> (j % 8); - } - } - StretchDIBits( himl->hdcImage, pt.x, pt.y, himl->cx, himl->cy, - n * width, 0, width, height, bits, info, DIB_RGB_COLORS, SRCCOPY ); - if (mask_info) - StretchDIBits( himl->hdcMask, pt.x, pt.y, himl->cx, himl->cy, - n * width, 0, width, height, mask_bits, mask_info, DIB_RGB_COLORS, SRCCOPY ); - } + add_dib_bits( himl, pos, count, width, height, info, mask_info, bits, mask_bits ); ret = TRUE; done: @@ -2069,17 +2089,6 @@ ImageList_Merge (HIMAGELIST himl1, INT i1, HIMAGELIST himl2, INT i2, } -/*********************************************************************** - * DIB_GetDIBImageBytes - * - * Return the number of bytes used to hold the image in a DIB bitmap. - */ -static int DIB_GetDIBImageBytes( int width, int height, int depth ) -{ - return (((width * depth + 31) / 8) & ~3) * abs( height ); -} - - /* helper for ImageList_Read, see comments below */ static BOOL _read_bitmap(HDC hdcIml, LPSTREAM pstm) { @@ -2112,7 +2121,7 @@ static BOOL _read_bitmap(HDC hdcIml, LPSTREAM pstm) else palspace = 0; - bmi->bmiHeader.biSizeImage = DIB_GetDIBImageBytes(bmi->bmiHeader.biWidth, bmi->bmiHeader.biHeight, bitsperpixel); + bmi->bmiHeader.biSizeImage = get_dib_image_size( bmi ); /* read the palette right after the end of the bitmapinfoheader */ if (palspace && FAILED(IStream_Read(pstm, bmi->bmiColors, palspace, NULL))) @@ -2902,7 +2911,7 @@ _write_bitmap(HBITMAP hBitmap, LPSTREAM pstm) return FALSE; bitCount = bm.bmBitsPixel == 1 ? 1 : 24; - sizeImage = DIB_GetDIBImageBytes(bm.bmWidth, bm.bmHeight, bitCount); + sizeImage = get_dib_stride(bm.bmWidth, bitCount) * bm.bmHeight; totalSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER); if(bitCount != 24)
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Alexandre Julliard