diff options
Diffstat (limited to 'canvas/source/cairo/cairo_textlayout.cxx')
| -rw-r--r-- | canvas/source/cairo/cairo_textlayout.cxx | 302 |
1 files changed, 267 insertions, 35 deletions
diff --git a/canvas/source/cairo/cairo_textlayout.cxx b/canvas/source/cairo/cairo_textlayout.cxx index 5078289a9c40..f822749cab20 100644 --- a/canvas/source/cairo/cairo_textlayout.cxx +++ b/canvas/source/cairo/cairo_textlayout.cxx @@ -31,6 +31,8 @@ // MARKER(update_precomp.py): autogen include statement, do not remove #include "precompiled_canvas.hxx" +#include <math.h> + #include <canvas/debug.hxx> #include <canvas/verbosetrace.hxx> #include <tools/diagnose_ex.h> @@ -38,6 +40,13 @@ #include <vcl/metric.hxx> #include <vcl/virdev.hxx> +#ifdef WNT +#include <tools/prewin.h> +#include <windows.h> +#include <tools/postwin.h> +#endif +#include <vcl/sysdata.hxx> + #include <basegfx/matrix/b2dhommatrix.hxx> #include <basegfx/numeric/ftools.hxx> @@ -46,6 +55,17 @@ #include "cairo_textlayout.hxx" #include "cairo_spritecanvas.hxx" +#ifdef CAIRO_HAS_QUARTZ_SURFACE +# include "cairo_quartz_cairo.hxx" +#elif defined CAIRO_HAS_WIN32_SURFACE +# include "cairo_win32_cairo.hxx" +# include <cairo-win32.h> +#elif defined CAIRO_HAS_XLIB_SURFACE +# include "cairo_xlib_cairo.hxx" +# include <cairo-ft.h> +#else +# error Native API needed. +#endif using namespace ::cairo; using namespace ::com::sun::star; @@ -292,6 +312,11 @@ namespace cairocanvas cairo_set_font_size( pCairo, aFontRequest.CellSize ); } + /** TextLayout:draw + * + * This function uses the "toy" api of the cairo library + * + **/ bool TextLayout::draw( Cairo* pCairo ) { ::osl::MutexGuard aGuard( m_aMutex ); @@ -310,6 +335,248 @@ namespace cairocanvas return true; } + + /** + * TextLayout::isCairoRenderable + * + * Features currenly not supported by Cairo (VCL rendering is used as fallback): + * - vertical glyphs + * + * @return true, if text/font can be rendered with cairo + **/ + bool TextLayout::isCairoRenderable(SystemFontData aSysFontData) const + { +#if defined UNX && !defined QUARTZ + // is font usable? + if (!aSysFontData.nFontId) return false; +#endif + + // vertical glyph rendering is not supported in cairo for now + if (aSysFontData.bVerticalCharacterType) { + OSL_TRACE(":cairocanvas::TextLayout::isCairoRenderable(): ***************** VERTICAL CHARACTER STYLE!!! ****************"); + return false; + } + + return true; + } + + + /** + * TextLayout::draw + * + * Cairo-based text rendering. Draw text directly on the cairo surface with cairo fonts. + * Avoid using VCL VirtualDevices for that, bypassing VCL DrawText functions, when possible + * + * Note: some text effects are not rendered due to lacking generic canvas or cairo canvas + * implementation. See issues 92657, 92658, 92659, 92660, 97529 + * + * @return true, if successful + **/ + bool TextLayout::draw( SurfaceSharedPtr& pSurface, + OutputDevice& rOutDev, + const Point& rOutpos, + const rendering::ViewState& viewState, + const rendering::RenderState& renderState ) const + { + ::osl::MutexGuard aGuard( m_aMutex ); + SystemTextLayoutData aSysLayoutData; +#if (defined CAIRO_HAS_WIN32_SURFACE) && (OSL_DEBUG_LEVEL > 1) + LOGFONTW logfont; +#endif + setupLayoutMode( rOutDev, mnTextDirection ); + + // TODO(P2): cache that + ::boost::scoped_array< sal_Int32 > aOffsets(new sal_Int32[maLogicalAdvancements.getLength()]); + + if( maLogicalAdvancements.getLength() ) + { + setupTextOffsets( aOffsets.get(), maLogicalAdvancements, viewState, renderState ); + + // TODO(F3): ensure correct length and termination for DX + // array (last entry _must_ contain the overall width) + } + + aSysLayoutData = rOutDev.GetSysTextLayoutData(rOutpos, maText.Text, + ::canvas::tools::numeric_cast<USHORT>(maText.StartPosition), + ::canvas::tools::numeric_cast<USHORT>(maText.Length), + maLogicalAdvancements.getLength() ? aOffsets.get() : NULL); + + // The ::GetSysTextLayoutData(), i.e. layouting of text to glyphs can change the font being used. + // The fallback checks need to be done after final font is known. + if (!isCairoRenderable(aSysLayoutData.aSysFontData)) // VCL FALLBACKS + { + OSL_TRACE(":cairocanvas::TextLayout::draw(S,O,p,v,r): VCL FALLBACK %s%s%s%s - %s", + maLogicalAdvancements.getLength() ? "ADV " : "", + aSysLayoutData.aSysFontData.bAntialias ? "AA " : "", + aSysLayoutData.aSysFontData.bFakeBold ? "FB " : "", + aSysLayoutData.aSysFontData.bFakeItalic ? "FI " : "", + ::rtl::OUStringToOString( maText.Text.copy( maText.StartPosition, maText.Length ), + RTL_TEXTENCODING_UTF8 ).getStr()); + + if (maLogicalAdvancements.getLength()) // VCL FALLBACK - with glyph advances + { + rOutDev.DrawTextArray( rOutpos, maText.Text, aOffsets.get(), + ::canvas::tools::numeric_cast<USHORT>(maText.StartPosition), + ::canvas::tools::numeric_cast<USHORT>(maText.Length) ); + return true; + } + else // VCL FALLBACK - without advances + { + rOutDev.DrawText( rOutpos, maText.Text, + ::canvas::tools::numeric_cast<USHORT>(maText.StartPosition), + ::canvas::tools::numeric_cast<USHORT>(maText.Length) ); + return true; + } + } + + if (aSysLayoutData.rGlyphData.empty()) return false; //??? false? + + /** + * Setup platform independent glyph vector into cairo-based glyphs vector. + **/ + + // setup glyphs + std::vector<cairo_glyph_t> cairo_glyphs; + cairo_glyphs.reserve( 256 ); + + for( int nStart = 0; nStart < (int) aSysLayoutData.rGlyphData.size(); nStart++ ) + { + cairo_glyph_t aGlyph; + SystemGlyphData systemGlyph = aSysLayoutData.rGlyphData.at(nStart); + aGlyph.index = systemGlyph.index; +#ifdef CAIRO_HAS_WIN32_SURFACE + // Cairo requires standard glyph indexes (ETO_GLYPH_INDEX), while vcl/win/* uses ucs4 chars. + // Convert to standard indexes + aGlyph.index = cairo::ucs4toindex((unsigned int) aGlyph.index, aSysLayoutData.aSysFontData.hFont); +#endif + aGlyph.x = systemGlyph.x; + aGlyph.y = systemGlyph.y; + cairo_glyphs.push_back(aGlyph); + } + + if (cairo_glyphs.empty()) return true; //true or false?? + + /** + * Setup font + **/ + cairo_font_face_t* font_face = NULL; + +#ifdef CAIRO_HAS_QUARTZ_SURFACE + // TODO: use cairo_quartz_font_face_create_for_cgfont(cgFont) + // when CGFont (Mac OS X 10.5 API) is provided by the AQUA VCL backend. + font_face = cairo_quartz_font_face_create_for_atsu_font_id((ATSUFontID) aSysLayoutData.aSysFontData.aATSUFontID); + +#elif defined CAIRO_HAS_WIN32_SURFACE + #if (OSL_DEBUG_LEVEL > 1) + GetObjectW( aSysLayoutData.aSysFontData.hFont, sizeof(logfont), &logfont ); + #endif + // Note: cairo library uses logfont fallbacks when lfEscapement, lfOrientation and lfWidth are not zero. + // VCL always has non-zero value for lfWidth + font_face = cairo_win32_font_face_create_for_hfont(aSysLayoutData.aSysFontData.hFont); + +#elif defined CAIRO_HAS_XLIB_SURFACE + font_face = cairo_ft_font_face_create_for_ft_face((FT_Face)aSysLayoutData.aSysFontData.nFontId, + aSysLayoutData.aSysFontData.nFontFlags); +#else +# error Native API needed. +#endif + + CairoSharedPtr pSCairo = pSurface->getCairo(); + + cairo_set_font_face( pSCairo.get(), font_face); + + // create default font options. cairo_get_font_options() does not retrieve the surface defaults, + // only what has been set before with cairo_set_font_options() + cairo_font_options_t* options = cairo_font_options_create(); + if (aSysLayoutData.aSysFontData.bAntialias) { + // CAIRO_ANTIALIAS_GRAY provides more similar result to VCL Canvas, + // so we're not using CAIRO_ANTIALIAS_SUBPIXEL + cairo_font_options_set_antialias(options, CAIRO_ANTIALIAS_GRAY); + } + cairo_set_font_options( pSCairo.get(), options); + + // Font color + Color mTextColor = rOutDev.GetTextColor(); + cairo_set_source_rgb(pSCairo.get(), + mTextColor.GetRed()/255.0, + mTextColor.GetGreen()/255.0, + mTextColor.GetBlue()/255.0); + + // Font rotation and scaling + cairo_matrix_t m; + Font aFont = rOutDev.GetFont(); + FontMetric aMetric( rOutDev.GetFontMetric(aFont) ); + long nWidth = 0; + + // width calculation is deep magic and platform/font dependant. + // width == 0 means no scaling, and usually width == height means the same. + // Other values mean horizontal scaling (narrow or stretching) + // see issue #101566 + + //proper scale calculation across platforms + if (aFont.GetWidth() == 0) { + nWidth = aFont.GetHeight(); + } else { + // any scaling needs to be relative to the platform-dependent definition + // of width of the font + nWidth = aFont.GetHeight() * aFont.GetWidth() / aMetric.GetWidth(); + } + + cairo_matrix_init_identity(&m); + + if (aSysLayoutData.orientation) cairo_matrix_rotate(&m, (3600 - aSysLayoutData.orientation) * M_PI / 1800.0); + + cairo_matrix_scale(&m, nWidth, aFont.GetHeight()); + + //faux italics + if (aSysLayoutData.aSysFontData.bFakeItalic) m.xy = -m.xx * 0x6000L / 0x10000L; + + cairo_set_font_matrix(pSCairo.get(), &m); + + OSL_TRACE("\r\n:cairocanvas::TextLayout::draw(S,O,p,v,r): Size:(%d,%d), W:%d->%d, Pos (%d,%d), G(%d,%d,%d) %s%s%s%s || Name:%s - %s", + aFont.GetWidth(), + aFont.GetHeight(), + aMetric.GetWidth(), + nWidth, + (int) rOutpos.X(), + (int) rOutpos.Y(), + cairo_glyphs[0].index, cairo_glyphs[1].index, cairo_glyphs[2].index, + maLogicalAdvancements.getLength() ? "ADV " : "", + aSysLayoutData.aSysFontData.bAntialias ? "AA " : "", + aSysLayoutData.aSysFontData.bFakeBold ? "FB " : "", + aSysLayoutData.aSysFontData.bFakeItalic ? "FI " : "", +#if (defined CAIRO_HAS_WIN32_SURFACE) && (OSL_DEBUG_LEVEL > 1) + ::rtl::OUStringToOString( reinterpret_cast<const sal_Unicode*> (logfont.lfFaceName), RTL_TEXTENCODING_UTF8 ).getStr(), +#else + ::rtl::OUStringToOString( aFont.GetName(), RTL_TEXTENCODING_UTF8 ).getStr(), +#endif + ::rtl::OUStringToOString( maText.Text.copy( maText.StartPosition, maText.Length ), + RTL_TEXTENCODING_UTF8 ).getStr() + ); + + cairo_show_glyphs(pSCairo.get(), &cairo_glyphs[0], cairo_glyphs.size()); + + //faux bold + if (aSysLayoutData.aSysFontData.bFakeBold) { + double bold_dx = 0.5 * sqrt( 0.7 * aFont.GetHeight() ); + int total_steps = 2 * ((int) (bold_dx + 0.5)); + + // loop to draw the text for every half pixel of displacement + for (int nSteps = 0; nSteps < total_steps; nSteps++) { + for(int nGlyphIdx = 0; nGlyphIdx < (int) cairo_glyphs.size(); nGlyphIdx++) { + cairo_glyphs[nGlyphIdx].x += bold_dx * nSteps / total_steps; + } + cairo_show_glyphs(pSCairo.get(), &cairo_glyphs[0], cairo_glyphs.size()); + } + OSL_TRACE(":cairocanvas::TextLayout::draw(S,O,p,v,r): FAKEBOLD - dx:%d", (int) bold_dx); + } + + cairo_restore( pSCairo.get() ); + cairo_font_face_destroy(font_face); + return true; + } + + namespace { class OffsetTransformer @@ -363,41 +630,6 @@ namespace cairocanvas OffsetTransformer( aMatrix ) ); } - bool TextLayout::draw( OutputDevice& rOutDev, - const Point& rOutpos, - const rendering::ViewState& viewState, - const rendering::RenderState& renderState ) const - { - ::osl::MutexGuard aGuard( m_aMutex ); - - setupLayoutMode( rOutDev, mnTextDirection ); - - if( maLogicalAdvancements.getLength() ) - { - // TODO(P2): cache that - ::boost::scoped_array< sal_Int32 > aOffsets(new sal_Int32[maLogicalAdvancements.getLength()]); - setupTextOffsets( aOffsets.get(), maLogicalAdvancements, viewState, renderState ); - - // TODO(F3): ensure correct length and termination for DX - // array (last entry _must_ contain the overall width) - - rOutDev.DrawTextArray( rOutpos, - maText.Text, - aOffsets.get(), - ::canvas::tools::numeric_cast<USHORT>(maText.StartPosition), - ::canvas::tools::numeric_cast<USHORT>(maText.Length) ); - } - else - { - rOutDev.DrawText( rOutpos, - maText.Text, - ::canvas::tools::numeric_cast<USHORT>(maText.StartPosition), - ::canvas::tools::numeric_cast<USHORT>(maText.Length) ); - } - - return true; - } - #define SERVICE_NAME "com.sun.star.rendering.TextLayout" #define IMPLEMENTATION_NAME "CairoCanvas::TextLayout" |