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-rw-r--r--WebKit/win/WebFrame.cpp135
1 files changed, 99 insertions, 36 deletions
diff --git a/WebKit/win/WebFrame.cpp b/WebKit/win/WebFrame.cpp
index 0e8ee80..319fbbc 100644
--- a/WebKit/win/WebFrame.cpp
+++ b/WebKit/win/WebFrame.cpp
@@ -2150,12 +2150,10 @@ static HDC hdcFromContext(PlatformGraphicsContext* pctx)
void WebFrame::drawHeader(PlatformGraphicsContext* pctx, IWebUIDelegate* ui, const IntRect& pageRect, float headerHeight)
{
HDC hdc = hdcFromContext(pctx);
- const IntRect& marginRect = printerMarginRect(hdc);
- const float scale = scaleFactor(hdc, marginRect, pageRect);
- int x = static_cast<int>(scale * pageRect.x());
+ int x = pageRect.x();
int y = 0;
- RECT headerRect = {x, y, x + static_cast<int>(scale * pageRect.width()), y + static_cast<int>(scale * headerHeight)};
+ RECT headerRect = {x, y, x + pageRect.width(), y + static_cast<int>(headerHeight)};
ui->drawHeaderInRect(d->webView, &headerRect, static_cast<OLE_HANDLE>(reinterpret_cast<LONG64>(hdc)));
}
@@ -2163,16 +2161,29 @@ void WebFrame::drawHeader(PlatformGraphicsContext* pctx, IWebUIDelegate* ui, con
void WebFrame::drawFooter(PlatformGraphicsContext* pctx, IWebUIDelegate* ui, const IntRect& pageRect, UINT page, UINT pageCount, float headerHeight, float footerHeight)
{
HDC hdc = hdcFromContext(pctx);
- const IntRect& marginRect = printerMarginRect(hdc);
-
- const float scale = scaleFactor(hdc, marginRect, pageRect);
- int x = static_cast<int>(scale * pageRect.x());
- int y = static_cast<int>(scale * max(static_cast<int>(headerHeight) + pageRect.height(), m_pageHeight-static_cast<int>(footerHeight)));
- RECT footerRect = {x, y, x + static_cast<int>(scale * pageRect.width()), y + static_cast<int>(scale * footerHeight)};
+
+ int x = pageRect.x();
+ int y = max(static_cast<int>(headerHeight) + pageRect.height(), m_pageHeight -static_cast<int>(footerHeight));
+ RECT footerRect = {x, y, x + pageRect.width(), y + static_cast<int>(footerHeight)};
ui->drawFooterInRect(d->webView, &footerRect, static_cast<OLE_HANDLE>(reinterpret_cast<LONG64>(hdc)), page+1, pageCount);
}
+static XFORM buildXFORMFromCairo(HDC targetDC, cairo_t* previewContext)
+{
+ XFORM scaled;
+ GetWorldTransform(targetDC, &scaled);
+
+ cairo_matrix_t ctm;
+ cairo_get_matrix(previewContext, &ctm);
+
+ // Scale to the preview screen bounds
+ scaled.eM11 = ctm.xx;
+ scaled.eM22 = ctm.yy;
+
+ return scaled;
+}
+
void WebFrame::spoolPage(PlatformGraphicsContext* pctx, GraphicsContext* spoolCtx, HDC printDC, IWebUIDelegate* ui, float headerHeight, float footerHeight, UINT page, UINT pageCount)
{
Frame* coreFrame = core(this);
@@ -2180,48 +2191,83 @@ void WebFrame::spoolPage(PlatformGraphicsContext* pctx, GraphicsContext* spoolCt
const IntRect& pageRect = m_pageRects[page];
const IntRect& marginRect = printerMarginRect(printDC);
- cairo_save(pctx);
+ // In preview, the printDC is a placeholder, so just always use the HDC backing the graphics context.
+ HDC hdc = hdcFromContext(pctx);
+
spoolCtx->save();
- float scale = scaleFactor(printDC, marginRect, pageRect);
- cairo_scale(pctx, scale, scale);
+
+ XFORM original, scaled;
+ GetWorldTransform(hdc, &original);
+
+ bool preview = (hdc != printDC);
+ if (preview) {
+ // If this is a preview, the Windows HDC was set to a non-scaled state so that Cairo will
+ // draw correctly. We need to retain the correct preview scale here for use when the Cairo
+ // drawing completes so that we can scale our GDI-based header/footer calls. This is a
+ // workaround for a bug in Cairo (see https://bugs.freedesktop.org/show_bug.cgi?id=28161)
+ scaled = buildXFORMFromCairo(hdc, pctx);
+ }
- IntRect cairoMarginRect (marginRect);
- cairoMarginRect.scale (1 / scale);
+ float scale = scaleFactor(printDC, marginRect, pageRect);
+
+ IntRect cairoMarginRect(marginRect);
+ cairoMarginRect.scale(1 / scale);
- // Modify Cairo and GDI World Transform to account for margin in the
- // subsequent WebKit-controlled 'paintContents' drawing operations:
- spoolCtx->translate(cairoMarginRect.x(), cairoMarginRect.y() + headerHeight);
+ // We cannot scale the display HDC because the print surface also scales fonts,
+ // resulting in invalid printing (and print preview)
+ cairo_scale(pctx, scale, scale);
+ cairo_translate(pctx, cairoMarginRect.x(), cairoMarginRect.y() + headerHeight);
// Modify Cairo (only) to account for page position.
cairo_translate(pctx, -pageRect.x(), -pageRect.y());
coreFrame->view()->paintContents(spoolCtx, pageRect);
-
cairo_translate(pctx, pageRect.x(), pageRect.y());
-
- XFORM originalWorld;
- ::GetWorldTransform(printDC, &originalWorld);
-
- // Position GDI world transform to account for margin in GDI-only
- // header/footer calls
- XFORM newWorld = originalWorld;
- newWorld.eDx = marginRect.x();
- newWorld.eDy = marginRect.y();
-
- ::SetWorldTransform(printDC, &newWorld);
-
+
+ if (preview) {
+ // If this is a preview, the Windows HDC was set to a non-scaled state so that Cairo would
+ // draw correctly. We need to rescale the HDC to the correct preview scale so our GDI-based
+ // header/footer calls will draw properly. This is a workaround for a bug in Cairo.
+ // (see https://bugs.freedesktop.org/show_bug.cgi?id=28161)
+ SetWorldTransform(hdc, &scaled);
+ }
+
+ XFORM xform = TransformationMatrix().translate(marginRect.x(), marginRect.y()).scale(scale);
+ ModifyWorldTransform(hdc, &xform, MWT_LEFTMULTIPLY);
+
if (headerHeight)
drawHeader(pctx, ui, pageRect, headerHeight);
if (footerHeight)
drawFooter(pctx, ui, pageRect, page, pageCount, headerHeight, footerHeight);
- ::SetWorldTransform(printDC, &originalWorld);
+ SetWorldTransform(hdc, &original);
cairo_show_page(pctx);
ASSERT(!cairo_status(pctx));
spoolCtx->restore();
- cairo_restore(pctx);
}
+
+static void setCairoTransformToPreviewHDC(cairo_t* previewCtx, HDC previewDC)
+{
+ XFORM passedCTM;
+ GetWorldTransform(previewDC, &passedCTM);
+
+ // Reset HDC WorldTransform to unscaled state. Scaling must be
+ // done in Cairo to avoid drawing errors.
+ XFORM unscaledCTM = passedCTM;
+ unscaledCTM.eM11 = 1.0;
+ unscaledCTM.eM22 = 1.0;
+
+ SetWorldTransform(previewDC, &unscaledCTM);
+
+ // Make the Cairo transform match the information passed to WebKit
+ // in the HDC's WorldTransform.
+ cairo_matrix_t ctm = { passedCTM.eM11, passedCTM.eM12, passedCTM.eM21,
+ passedCTM.eM22, passedCTM.eDx, passedCTM.eDy };
+
+ cairo_set_matrix(previewCtx, &ctm);
+}
+
#endif
HRESULT STDMETHODCALLTYPE WebFrame::spoolPages(
@@ -2240,13 +2286,28 @@ HRESULT STDMETHODCALLTYPE WebFrame::spoolPages(
ASSERT_NOT_REACHED();
return E_POINTER;
}
+
+ HDC targetDC = (ctx) ? (HDC)ctx : printDC;
- cairo_surface_t* printSurface = cairo_win32_printing_surface_create(printDC);
- ctx = cairo_create(printSurface);
- if (!ctx) {
+ cairo_surface_t* printSurface = 0;
+ if (ctx)
+ printSurface = cairo_win32_surface_create(targetDC); // in-memory
+ else
+ printSurface = cairo_win32_printing_surface_create(targetDC); // metafile
+
+ PlatformGraphicsContext* pctx = (PlatformGraphicsContext*)cairo_create(printSurface);
+ if (!pctx) {
cairo_surface_destroy(printSurface);
return E_FAIL;
}
+
+ if (ctx) {
+ // If this is a preview, the Windows HDC was sent with scaling information.
+ // Retrieve it and reset it so that it draws properly. This is a workaround
+ // for a bug in Cairo (see https://bugs.freedesktop.org/show_bug.cgi?id=28161)
+ setCairoTransformToPreviewHDC(pctx, targetDC);
+ }
+
cairo_surface_set_fallback_resolution(printSurface, 72.0, 72.0);
#endif
@@ -2260,7 +2321,9 @@ HRESULT STDMETHODCALLTYPE WebFrame::spoolPages(
return E_FAIL;
UINT pageCount = (UINT) m_pageRects.size();
+#if PLATFORM(CG)
PlatformGraphicsContext* pctx = (PlatformGraphicsContext*)ctx;
+#endif
if (!pageCount || startPage > pageCount) {
ASSERT_NOT_REACHED();
generated by cgit v1.1 at 2025-08-15 19:19:13 +0000