From d8543bb6618c17b12da906afa77d216f58cf4058 Mon Sep 17 00:00:00 2001 From: Upstream Date: Mon, 12 Jan 1970 13:46:40 +0000 Subject: external/webkit r30707 --- WebCore/platform/win/DragImageCGWin.cpp | 166 ++++++++++++++++++++++++++++++++ 1 file changed, 166 insertions(+) create mode 100644 WebCore/platform/win/DragImageCGWin.cpp (limited to 'WebCore/platform/win/DragImageCGWin.cpp') diff --git a/WebCore/platform/win/DragImageCGWin.cpp b/WebCore/platform/win/DragImageCGWin.cpp new file mode 100644 index 0000000..7788572 --- /dev/null +++ b/WebCore/platform/win/DragImageCGWin.cpp @@ -0,0 +1,166 @@ +/* + * Copyright (C) 2007, 2008 Apple Inc. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "config.h" +#include "DragImage.h" + +#include "CachedImage.h" +#include "GraphicsContext.h" +#include "Image.h" +#include "RetainPtr.h" + +#include + +#include + +namespace WebCore { + +HBITMAP allocImage(HDC dc, IntSize size, CGContextRef *targetRef) +{ + HBITMAP hbmp; + BITMAPINFO bmpInfo = {0}; + bmpInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER); + bmpInfo.bmiHeader.biWidth = size.width(); + bmpInfo.bmiHeader.biHeight = size.height(); + bmpInfo.bmiHeader.biPlanes = 1; + bmpInfo.bmiHeader.biBitCount = 32; + bmpInfo.bmiHeader.biCompression = BI_RGB; + LPVOID bits; + hbmp = CreateDIBSection(dc, &bmpInfo, DIB_RGB_COLORS, &bits, 0, 0); + + if (!targetRef) + return hbmp; + + CGColorSpaceRef deviceRGB = CGColorSpaceCreateDeviceRGB(); + CGContextRef bitmapContext = CGBitmapContextCreate(bits, bmpInfo.bmiHeader.biWidth, bmpInfo.bmiHeader.biHeight, 8, + bmpInfo.bmiHeader.biWidth * 4, deviceRGB, + kCGBitmapByteOrder32Little | kCGImageAlphaNoneSkipFirst); + CGColorSpaceRelease(deviceRGB); + if (!bitmapContext) { + DeleteObject(hbmp); + return 0; + } + + *targetRef = bitmapContext; + return hbmp; +} + +static CGContextRef createCgContextFromBitmap(HBITMAP bitmap) +{ + BITMAP info; + GetObject(bitmap, sizeof(info), &info); + ASSERT(info.bmBitsPixel == 32); + + CGColorSpaceRef deviceRGB = CGColorSpaceCreateDeviceRGB(); + CGContextRef bitmapContext = CGBitmapContextCreate(info.bmBits, info.bmWidth, info.bmHeight, 8, + info.bmWidthBytes, deviceRGB, kCGBitmapByteOrder32Little | kCGImageAlphaNoneSkipFirst); + CGColorSpaceRelease(deviceRGB); + return bitmapContext; +} + +DragImageRef scaleDragImage(DragImageRef image, FloatSize scale) +{ + // FIXME: due to the way drag images are done on windows we need + // to preprocess the alpha channel + + if (!image) + return 0; + CGContextRef targetContext; + CGContextRef srcContext; + CGImageRef srcImage; + IntSize srcSize = dragImageSize(image); + IntSize dstSize(static_cast(srcSize.width() * scale.width()), static_cast(srcSize.height() * scale.height())); + HBITMAP hbmp = 0; + HDC dc = GetDC(0); + HDC dstDC = CreateCompatibleDC(dc); + if (!dstDC) + goto exit; + + hbmp = allocImage(dstDC, dstSize, &targetContext); + if (!hbmp) + goto exit; + + srcContext = createCgContextFromBitmap(image); + srcImage = CGBitmapContextCreateImage(srcContext); + CGRect rect; + rect.origin.x = 0; + rect.origin.y = 0; + rect.size = dstSize; + CGContextDrawImage(targetContext, rect, srcImage); + CGImageRelease(srcImage); + CGContextRelease(srcContext); + CGContextRelease(targetContext); + ::DeleteObject(image); + image = 0; + +exit: + if (!hbmp) + hbmp = image; + if (dstDC) + DeleteDC(dstDC); + ReleaseDC(0, dc); + return hbmp; +} + +DragImageRef createDragImageFromImage(Image* img) +{ + HBITMAP hbmp = 0; + HDC dc = GetDC(0); + HDC workingDC = CreateCompatibleDC(dc); + CGContextRef drawContext = 0; + if (!workingDC) + goto exit; + + hbmp = allocImage(workingDC, img->size(), &drawContext); + + if (!hbmp) + goto exit; + + if (!drawContext) { + ::DeleteObject(hbmp); + hbmp = 0; + } + + CGImageRef srcImage = img->getCGImageRef(); + CGRect rect; + rect.size = img->size(); + rect.origin.x = 0; + rect.origin.y = -rect.size.height; + static const CGFloat white [] = {1.0, 1.0, 1.0, 1.0}; + CGContextScaleCTM(drawContext, 1, -1); + CGContextSetFillColor(drawContext, white); + CGContextFillRect(drawContext, rect); + CGContextSetBlendMode(drawContext, kCGBlendModeNormal); + CGContextDrawImage(drawContext, rect, srcImage); + CGContextRelease(drawContext); + +exit: + if (workingDC) + DeleteDC(workingDC); + ReleaseDC(0, dc); + return hbmp; +} + +} -- cgit v1.1