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Unified Diff: Source/core/platform/graphics/harfbuzz/HarfBuzzFaceSkia.cpp

Issue 99103006: Moving GraphicsContext and dependencies from core to platform. (Closed) Base URL: svn://svn.chromium.org/blink/trunk
Patch Set: Final patch - fixes Android Created 7 years ago
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Index: Source/core/platform/graphics/harfbuzz/HarfBuzzFaceSkia.cpp
diff --git a/Source/core/platform/graphics/harfbuzz/HarfBuzzFaceSkia.cpp b/Source/core/platform/graphics/harfbuzz/HarfBuzzFaceSkia.cpp
deleted file mode 100644
index 961707a3f82e6c73013a4bd0ebfb46de52ff2aee..0000000000000000000000000000000000000000
--- a/Source/core/platform/graphics/harfbuzz/HarfBuzzFaceSkia.cpp
+++ /dev/null
@@ -1,196 +0,0 @@
-/*
- * Copyright (c) 2012 Google 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:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * 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.
- * * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "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 THE COPYRIGHT
- * OWNER 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 "core/platform/graphics/harfbuzz/HarfBuzzFace.h"
-
-#include "SkPaint.h"
-#include "SkPath.h"
-#include "SkPoint.h"
-#include "SkRect.h"
-#include "SkTypeface.h"
-#include "SkUtils.h"
-#include "core/platform/graphics/FontPlatformData.h"
-#include "core/platform/graphics/SimpleFontData.h"
-#include "core/platform/graphics/harfbuzz/HarfBuzzShaper.h"
-#include "platform/fonts/GlyphBuffer.h"
-
-#include "hb.h"
-#include "wtf/HashMap.h"
-
-namespace WebCore {
-
-// Our implementation of the callbacks which HarfBuzz requires by using Skia
-// calls. See the HarfBuzz source for references about what these callbacks do.
-
-struct HarfBuzzFontData {
- HarfBuzzFontData(WTF::HashMap<uint32_t, uint16_t>* glyphCacheForFaceCacheEntry)
- : m_glyphCacheForFaceCacheEntry(glyphCacheForFaceCacheEntry)
- { }
- SkPaint m_paint;
- WTF::HashMap<uint32_t, uint16_t>* m_glyphCacheForFaceCacheEntry;
-};
-
-static hb_position_t SkiaScalarToHarfBuzzPosition(SkScalar value)
-{
- return SkScalarToFixed(value);
-}
-
-static void SkiaGetGlyphWidthAndExtents(SkPaint* paint, hb_codepoint_t codepoint, hb_position_t* width, hb_glyph_extents_t* extents)
-{
- ASSERT(codepoint <= 0xFFFF);
- paint->setTextEncoding(SkPaint::kGlyphID_TextEncoding);
-
- SkScalar skWidth;
- SkRect skBounds;
- uint16_t glyph = codepoint;
-
- paint->getTextWidths(&glyph, sizeof(glyph), &skWidth, &skBounds);
- if (width)
- *width = SkiaScalarToHarfBuzzPosition(skWidth);
- if (extents) {
- // Invert y-axis because Skia is y-grows-down but we set up HarfBuzz to be y-grows-up.
- extents->x_bearing = SkiaScalarToHarfBuzzPosition(skBounds.fLeft);
- extents->y_bearing = SkiaScalarToHarfBuzzPosition(-skBounds.fTop);
- extents->width = SkiaScalarToHarfBuzzPosition(skBounds.width());
- extents->height = SkiaScalarToHarfBuzzPosition(-skBounds.height());
- }
-}
-
-static hb_bool_t harfBuzzGetGlyph(hb_font_t* hbFont, void* fontData, hb_codepoint_t unicode, hb_codepoint_t variationSelector, hb_codepoint_t* glyph, void* userData)
-{
- HarfBuzzFontData* hbFontData = reinterpret_cast<HarfBuzzFontData*>(fontData);
-
- WTF::HashMap<uint32_t, uint16_t>::AddResult result = hbFontData->m_glyphCacheForFaceCacheEntry->add(unicode, 0);
- if (result.isNewEntry) {
- SkPaint* paint = &hbFontData->m_paint;
- paint->setTextEncoding(SkPaint::kUTF32_TextEncoding);
- uint16_t glyph16;
- paint->textToGlyphs(&unicode, sizeof(hb_codepoint_t), &glyph16);
- result.iterator->value = glyph16;
- *glyph = glyph16;
- }
- *glyph = result.iterator->value;
- return !!*glyph;
-}
-
-static hb_position_t harfBuzzGetGlyphHorizontalAdvance(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, void* userData)
-{
- HarfBuzzFontData* hbFontData = reinterpret_cast<HarfBuzzFontData*>(fontData);
- hb_position_t advance = 0;
-
- SkiaGetGlyphWidthAndExtents(&hbFontData->m_paint, glyph, &advance, 0);
- return advance;
-}
-
-static hb_bool_t harfBuzzGetGlyphHorizontalOrigin(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, hb_position_t* x, hb_position_t* y, void* userData)
-{
- // Just return true, following the way that HarfBuzz-FreeType
- // implementation does.
- return true;
-}
-
-static hb_bool_t harfBuzzGetGlyphExtents(hb_font_t* hbFont, void* fontData, hb_codepoint_t glyph, hb_glyph_extents_t* extents, void* userData)
-{
- HarfBuzzFontData* hbFontData = reinterpret_cast<HarfBuzzFontData*>(fontData);
-
- SkiaGetGlyphWidthAndExtents(&hbFontData->m_paint, glyph, 0, extents);
- return true;
-}
-
-static hb_font_funcs_t* harfBuzzSkiaGetFontFuncs()
-{
- static hb_font_funcs_t* harfBuzzSkiaFontFuncs = 0;
-
- // We don't set callback functions which we can't support.
- // HarfBuzz will use the fallback implementation if they aren't set.
- if (!harfBuzzSkiaFontFuncs) {
- harfBuzzSkiaFontFuncs = hb_font_funcs_create();
- hb_font_funcs_set_glyph_func(harfBuzzSkiaFontFuncs, harfBuzzGetGlyph, 0, 0);
- hb_font_funcs_set_glyph_h_advance_func(harfBuzzSkiaFontFuncs, harfBuzzGetGlyphHorizontalAdvance, 0, 0);
- hb_font_funcs_set_glyph_h_origin_func(harfBuzzSkiaFontFuncs, harfBuzzGetGlyphHorizontalOrigin, 0, 0);
- hb_font_funcs_set_glyph_extents_func(harfBuzzSkiaFontFuncs, harfBuzzGetGlyphExtents, 0, 0);
- hb_font_funcs_make_immutable(harfBuzzSkiaFontFuncs);
- }
- return harfBuzzSkiaFontFuncs;
-}
-
-static hb_blob_t* harfBuzzSkiaGetTable(hb_face_t* face, hb_tag_t tag, void* userData)
-{
- SkTypeface* typeface = reinterpret_cast<SkTypeface*>(userData);
-
- const size_t tableSize = typeface->getTableSize(tag);
- if (!tableSize)
- return 0;
-
- char* buffer = reinterpret_cast<char*>(fastMalloc(tableSize));
- if (!buffer)
- return 0;
- size_t actualSize = typeface->getTableData(tag, 0, tableSize, buffer);
- if (tableSize != actualSize) {
- fastFree(buffer);
- return 0;
- }
-
- return hb_blob_create(const_cast<char*>(buffer), tableSize, HB_MEMORY_MODE_WRITABLE, buffer, fastFree);
-}
-
-static void destroyHarfBuzzFontData(void* userData)
-{
- HarfBuzzFontData* hbFontData = reinterpret_cast<HarfBuzzFontData*>(userData);
- delete hbFontData;
-}
-
-hb_face_t* HarfBuzzFace::createFace()
-{
- hb_face_t* face = hb_face_create_for_tables(harfBuzzSkiaGetTable, m_platformData->typeface(), 0);
- ASSERT(face);
- return face;
-}
-
-hb_font_t* HarfBuzzFace::createFont()
-{
- HarfBuzzFontData* hbFontData = new HarfBuzzFontData(m_glyphCacheForFaceCacheEntry);
- m_platformData->setupPaint(&hbFontData->m_paint);
- hb_font_t* font = hb_font_create(m_face);
- hb_font_set_funcs(font, harfBuzzSkiaGetFontFuncs(), hbFontData, destroyHarfBuzzFontData);
- float size = m_platformData->size();
- int scale = SkiaScalarToHarfBuzzPosition(size);
- hb_font_set_scale(font, scale, scale);
- hb_font_make_immutable(font);
- return font;
-}
-
-GlyphBufferAdvance HarfBuzzShaper::createGlyphBufferAdvance(float width, float height)
-{
- return GlyphBufferAdvance(width, height);
-}
-
-} // namespace WebCore

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