259 lines
7.8 KiB
C++
259 lines
7.8 KiB
C++
// Copyright (c) 2008 The Chromium Embedded Framework Authors.
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// Portions copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "libcef/browser_webkit_glue.h"
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#include <atlcore.h>
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#include <atlbase.h>
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#include <commdlg.h>
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#include "third_party/WebKit/Source/WebCore/config.h"
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MSVC_PUSH_WARNING_LEVEL(0);
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#include "PlatformContextSkia.h" // NOLINT(build/include)
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MSVC_POP_WARNING();
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#undef LOG
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#include "base/logging.h"
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#include "skia/ext/platform_canvas.h"
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#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebRect.h"
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#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebSize.h"
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#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
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#include "ui/gfx/gdi_util.h"
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#include "webkit/glue/webkit_glue.h"
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using WebKit::WebRect;
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using WebKit::WebSize;
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using WebKit::WebView;
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namespace webkit_glue {
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bool EnsureFontLoaded(HFONT font) {
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return true;
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}
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void CaptureWebViewBitmap(HWND mainWnd, WebView* webview, HBITMAP& bitmap,
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SIZE& size) {
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WebKit::WebSize webSize = webview->size();
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size.cx = webSize.width;
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size.cy = webSize.height;
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skia::PlatformCanvas canvas(size.cx, size.cy, true);
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canvas.drawARGB(255, 255, 255, 255, SkXfermode::kSrc_Mode);
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WebCore::PlatformContextSkia context(&canvas);
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WebKit::WebRect rect(0, 0, size.cx, size.cy);
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webview->layout();
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webview->paint(&canvas, rect);
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HDC hRefDC = GetDC(mainWnd);
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HDC hDC = CreateCompatibleDC(hRefDC);
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bitmap = CreateCompatibleBitmap(hRefDC, size.cx, size.cy);
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DCHECK(bitmap != NULL);
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HBITMAP hOldBmp = (HBITMAP)SelectObject(hDC, bitmap);
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// Create a BMP v4 header that we can serialize.
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BITMAPV4HEADER bitmap_header;
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gfx::CreateBitmapV4Header(size.cx, size.cy, &bitmap_header);
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const SkBitmap& src_bmp = canvas.getDevice()->accessBitmap(true);
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SkAutoLockPixels src_lock(src_bmp);
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int retval = StretchDIBits(hDC,
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0,
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0,
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size.cx, size.cy,
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0, 0,
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size.cx, size.cy,
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src_bmp.getPixels(),
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reinterpret_cast<BITMAPINFO*>(&bitmap_header),
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DIB_RGB_COLORS,
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SRCCOPY);
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DCHECK(retval != GDI_ERROR);
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SelectObject(hDC, hOldBmp);
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DeleteDC(hDC);
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ReleaseDC(mainWnd, hRefDC);
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}
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static PBITMAPINFO BmpCreateInfo(HBITMAP hBmp) {
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BITMAP bmp;
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PBITMAPINFO pbmi;
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WORD cClrBits;
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// Retrieve the bitmap color format, width, and height.
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if (!GetObject(hBmp, sizeof(BITMAP), (LPSTR)&bmp)) {
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NOTREACHED();
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return NULL;
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}
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// Convert the color format to a count of bits.
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cClrBits = (WORD)(bmp.bmPlanes * bmp.bmBitsPixel);
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if (cClrBits == 1)
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cClrBits = 1;
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else if (cClrBits <= 4)
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cClrBits = 4;
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else if (cClrBits <= 8)
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cClrBits = 8;
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else if (cClrBits <= 16)
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cClrBits = 16;
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else if (cClrBits <= 24)
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cClrBits = 24;
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else
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cClrBits = 32;
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// Allocate memory for the BITMAPINFO structure. (This structure
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// contains a BITMAPINFOHEADER structure and an array of RGBQUAD
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// data structures.)
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if (cClrBits != 24) {
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pbmi = (PBITMAPINFO) LocalAlloc(LPTR,
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sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * (1<< cClrBits));
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} else { // There is no RGBQUAD array for the 24-bit-per-pixel format.
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pbmi = (PBITMAPINFO) LocalAlloc(LPTR, sizeof(BITMAPINFOHEADER));
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}
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// Initialize the fields in the BITMAPINFO structure.
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pbmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
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pbmi->bmiHeader.biWidth = bmp.bmWidth;
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pbmi->bmiHeader.biHeight = bmp.bmHeight;
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pbmi->bmiHeader.biPlanes = bmp.bmPlanes;
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pbmi->bmiHeader.biBitCount = bmp.bmBitsPixel;
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if (cClrBits < 24) {
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pbmi->bmiHeader.biClrUsed = (1<<cClrBits);
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}
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// If the bitmap is not compressed, set the BI_RGB flag.
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pbmi->bmiHeader.biCompression = BI_RGB;
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// Compute the number of bytes in the array of color
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// indices and store the result in biSizeImage.
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// For Windows NT, the width must be DWORD aligned unless
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// the bitmap is RLE compressed. This example shows this.
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// For Windows 95/98/Me, the width must be WORD aligned unless the
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// bitmap is RLE compressed.
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pbmi->bmiHeader.biSizeImage =
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((pbmi->bmiHeader.biWidth * cClrBits +31) & ~31) /8
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* pbmi->bmiHeader.biHeight;
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// Set biClrImportant to 0, indicating that all of the
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// device colors are important.
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pbmi->bmiHeader.biClrImportant = 0;
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return pbmi;
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}
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static BOOL BmpSaveFile(LPCTSTR pszFile, PBITMAPINFO pbi, HBITMAP hBMP,
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HDC hDC, LPBYTE lpBits = NULL) {
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HANDLE hf = INVALID_HANDLE_VALUE; // file handle
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BITMAPFILEHEADER hdr; // bitmap file-header
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PBITMAPINFOHEADER pbih; // bitmap info-header
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DWORD dwTotal; // total count of bytes
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DWORD cb; // incremental count of bytes
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BYTE* hp; // byte pointer
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DWORD dwTmp;
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BOOL ret = FALSE;
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BOOL bitsAlloc = FALSE;
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pbih = (PBITMAPINFOHEADER) pbi;
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if (!lpBits) {
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// The bits have not been provided, so retrieve from the bitmap file
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lpBits = (LPBYTE) GlobalAlloc(GMEM_FIXED, pbih->biSizeImage);
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if (!lpBits) {
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// Memory could not be allocated
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NOTREACHED();
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return FALSE;
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}
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bitsAlloc = TRUE;
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// Retrieve the color table (RGBQUAD array) and the bits
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// (array of palette indices) from the DIB.
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if (!GetDIBits(hDC, hBMP, 0, (WORD) pbih->biHeight, lpBits, pbi,
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DIB_RGB_COLORS)) {
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NOTREACHED();
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goto end;
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}
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}
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// Create the bitmap file.
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hf = CreateFile(pszFile,
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GENERIC_READ | GENERIC_WRITE,
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(DWORD) 0,
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NULL,
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CREATE_ALWAYS,
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FILE_ATTRIBUTE_NORMAL,
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(HANDLE) NULL);
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if (hf == INVALID_HANDLE_VALUE) {
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// Could not create the bitmap file
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NOTREACHED();
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goto end;
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}
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hdr.bfType = 0x4d42; // 0x42 = "B", 0x4d = "M"
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// Compute the size of the entire file.
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hdr.bfSize = (DWORD) (sizeof(BITMAPFILEHEADER) +
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pbih->biSize + pbih->biClrUsed
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* sizeof(RGBQUAD) + pbih->biSizeImage);
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hdr.bfReserved1 = 0;
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hdr.bfReserved2 = 0;
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// Compute the offset to the array of color indices.
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hdr.bfOffBits = (DWORD) sizeof(BITMAPFILEHEADER) +
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pbih->biSize + pbih->biClrUsed * sizeof(RGBQUAD);
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// Copy the BITMAPFILEHEADER into the bitmap file.
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if (!WriteFile(hf, (LPVOID) &hdr, sizeof(BITMAPFILEHEADER),
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(LPDWORD) &dwTmp, NULL)) {
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// Could not write bitmap file header to file
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NOTREACHED();
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goto end;
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}
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// Copy the BITMAPINFOHEADER and RGBQUAD array into the file.
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if (!WriteFile(hf, (LPVOID) pbih, sizeof(BITMAPINFOHEADER)
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+ pbih->biClrUsed * sizeof(RGBQUAD),
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(LPDWORD) &dwTmp, NULL)) {
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// Could not write bitmap info header to file
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NOTREACHED();
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goto end;
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}
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// Copy the array of color indices into the .BMP file.
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dwTotal = cb = pbih->biSizeImage;
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hp = lpBits;
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if (!WriteFile(hf, (LPSTR) hp, (DWORD) cb, (LPDWORD) &dwTmp, NULL)) {
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// Could not write bitmap data to file
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NOTREACHED();
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goto end;
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}
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ret = TRUE;
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end: // NOLINT(whitespace/labels)
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// Close the bitmap file.
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if (hf != INVALID_HANDLE_VALUE) {
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CloseHandle(hf);
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if (!ret)
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DeleteFile(pszFile);
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}
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if (bitsAlloc) {
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// Free memory.
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GlobalFree((HGLOBAL)lpBits);
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}
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return ret;
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}
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BOOL SaveBitmapToFile(HBITMAP hBmp, HDC hDC, LPCTSTR file, LPBYTE lpBits) {
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PBITMAPINFO pbmi = BmpCreateInfo(hBmp);
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BOOL ret = FALSE;
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if (pbmi) {
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ret = BmpSaveFile(file, pbmi, hBmp, hDC, lpBits);
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LocalFree(pbmi);
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}
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return ret;
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}
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} // namespace webkit_glue
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