forked from mirrors/gecko-dev
a89b67e772
Backed out changeset a8518ea4b594 (bug 1479960)
Backed out changeset 7172762c4b87 (bug 1536697)
Backed out changeset 2ea5ccb8f3a1 (bug 1426526)
Backed out changeset d892a888fe9c (bug 1426526)
Backed out changeset 2c4d12bdfec3 (bug 1479960)
Backed out changeset 8a322064cf6d (bug 1479960)
Backed out changeset 47d387b6cd4a (bug 1479960)
Backed out changeset 8332565a6943 (bug 1479960)
Backed out changeset 9d7f1835f96f (bug 1479960)
Backed out changeset 0aa8af4965c5 (bug 1479960)
Backed out changeset 036809330a51 (bug 1479960)
Backed out changeset 39e18373e3d3 (bug 1479960)
Backed out changeset 6c2b995a9d30 (bug 1479960)
Backed out changeset 3c2b31744645 (bug 1534780)
Backed out changeset 26bb00a94d5d (bug 1534780)
113 lines
3.3 KiB
C++
113 lines
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "SharedDIBWin.h"
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#include "gfxAlphaRecovery.h"
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#include "nsMathUtils.h"
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#include "nsDebug.h"
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namespace mozilla {
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namespace gfx {
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static const uint32_t kByteAlign = 1 << gfxAlphaRecovery::GoodAlignmentLog2();
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static const uint32_t kHeaderBytes =
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(uint32_t(sizeof(BITMAPV4HEADER)) + kByteAlign - 1) & ~(kByteAlign - 1);
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SharedDIBWin::SharedDIBWin()
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: mSharedHdc(nullptr), mSharedBmp(nullptr), mOldObj(nullptr) {}
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SharedDIBWin::~SharedDIBWin() { Close(); }
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nsresult SharedDIBWin::Close() {
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if (mSharedHdc && mOldObj) ::SelectObject(mSharedHdc, mOldObj);
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if (mSharedHdc) ::DeleteObject(mSharedHdc);
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if (mSharedBmp) ::DeleteObject(mSharedBmp);
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mSharedHdc = nullptr;
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mOldObj = mSharedBmp = nullptr;
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SharedDIB::Close();
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return NS_OK;
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}
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nsresult SharedDIBWin::Create(HDC aHdc, uint32_t aWidth, uint32_t aHeight,
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bool aTransparent) {
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Close();
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// create the offscreen shared dib
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BITMAPV4HEADER bmih;
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uint32_t size = SetupBitmapHeader(aWidth, aHeight, aTransparent, &bmih);
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nsresult rv = SharedDIB::Create(size);
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if (NS_FAILED(rv)) return rv;
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if (NS_FAILED(SetupSurface(aHdc, &bmih))) {
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Close();
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return NS_ERROR_FAILURE;
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}
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return NS_OK;
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}
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nsresult SharedDIBWin::Attach(Handle aHandle, uint32_t aWidth, uint32_t aHeight,
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bool aTransparent) {
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Close();
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BITMAPV4HEADER bmih;
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SetupBitmapHeader(aWidth, aHeight, aTransparent, &bmih);
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nsresult rv = SharedDIB::Attach(aHandle, 0);
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if (NS_FAILED(rv)) return rv;
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if (NS_FAILED(SetupSurface(nullptr, &bmih))) {
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Close();
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return NS_ERROR_FAILURE;
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}
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return NS_OK;
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}
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uint32_t SharedDIBWin::SetupBitmapHeader(uint32_t aWidth, uint32_t aHeight,
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bool aTransparent,
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BITMAPV4HEADER* aHeader) {
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// D3D cannot handle an offscreen memory that pitch (SysMemPitch) is negative.
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// So we create top-to-bottom DIB.
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memset((void*)aHeader, 0, sizeof(BITMAPV4HEADER));
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aHeader->bV4Size = sizeof(BITMAPV4HEADER);
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aHeader->bV4Width = aWidth;
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aHeader->bV4Height = -LONG(aHeight); // top-to-buttom DIB
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aHeader->bV4Planes = 1;
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aHeader->bV4BitCount = 32;
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aHeader->bV4V4Compression = BI_BITFIELDS;
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aHeader->bV4RedMask = 0x00FF0000;
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aHeader->bV4GreenMask = 0x0000FF00;
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aHeader->bV4BlueMask = 0x000000FF;
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if (aTransparent) aHeader->bV4AlphaMask = 0xFF000000;
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return (kHeaderBytes +
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(-aHeader->bV4Height * aHeader->bV4Width * kBytesPerPixel));
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}
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nsresult SharedDIBWin::SetupSurface(HDC aHdc, BITMAPV4HEADER* aHdr) {
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mSharedHdc = ::CreateCompatibleDC(aHdc);
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if (!mSharedHdc) return NS_ERROR_FAILURE;
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mSharedBmp = ::CreateDIBSection(mSharedHdc, (BITMAPINFO*)aHdr, DIB_RGB_COLORS,
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&mBitmapBits, mShMem->handle(), kHeaderBytes);
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if (!mSharedBmp) return NS_ERROR_FAILURE;
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mOldObj = SelectObject(mSharedHdc, mSharedBmp);
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return NS_OK;
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}
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} // namespace gfx
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} // namespace mozilla
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