#include "config.h"
#include "Font.h"
#include "AffineTransform.h"
#include "CairoUtilities.h"
#include "GlyphBuffer.h"
#include "Gradient.h"
#include "GraphicsContext.h"
#include "PlatformContextCairo.h"
#include "ImageBuffer.h"
#include "Pattern.h"
#include "ShadowBlur.h"
#include "SimpleFontData.h"
namespace WebCore {
static void drawGlyphsToContext(cairo_t* context, const SimpleFontData* font, GlyphBufferGlyph* glyphs, int numGlyphs)
{
cairo_matrix_t originalTransform;
float syntheticBoldOffset = font->syntheticBoldOffset();
if (syntheticBoldOffset)
cairo_get_matrix(context, &originalTransform);
cairo_set_scaled_font(context, font->platformData().scaledFont());
cairo_show_glyphs(context, glyphs, numGlyphs);
if (syntheticBoldOffset) {
cairo_translate(context, syntheticBoldOffset, 0);
cairo_show_glyphs(context, glyphs, numGlyphs);
}
if (syntheticBoldOffset)
cairo_set_matrix(context, &originalTransform);
}
static void drawGlyphsShadow(GraphicsContext* graphicsContext, const FloatPoint& point, const SimpleFontData* font, GlyphBufferGlyph* glyphs, int numGlyphs)
{
ShadowBlur& shadow = graphicsContext->platformContext()->shadowBlur();
if (!(graphicsContext->textDrawingMode() & TextModeFill) || shadow.type() == ShadowBlur::NoShadow)
return;
if (!shadow.mustUseShadowBlur(graphicsContext)) {
cairo_t* context = graphicsContext->platformContext()->cr();
cairo_save(context);
FloatSize shadowOffset(graphicsContext->state().shadowOffset);
cairo_translate(context, shadowOffset.width(), shadowOffset.height());
setSourceRGBAFromColor(context, graphicsContext->state().shadowColor);
drawGlyphsToContext(context, font, glyphs, numGlyphs);
cairo_restore(context);
return;
}
cairo_text_extents_t extents;
cairo_scaled_font_glyph_extents(font->platformData().scaledFont(), glyphs, numGlyphs, &extents);
FloatRect fontExtentsRect(point.x() + extents.x_bearing, point.y() + extents.y_bearing, extents.width, extents.height);
if (GraphicsContext* shadowContext = shadow.beginShadowLayer(graphicsContext, fontExtentsRect)) {
drawGlyphsToContext(shadowContext->platformContext()->cr(), font, glyphs, numGlyphs);
shadow.endShadowLayer(graphicsContext);
}
}
void Font::drawGlyphs(GraphicsContext* context, const SimpleFontData* font, const GlyphBuffer& glyphBuffer,
int from, int numGlyphs, const FloatPoint& point) const
{
if (!font->platformData().size())
return;
GlyphBufferGlyph* glyphs = const_cast<GlyphBufferGlyph*>(glyphBuffer.glyphs(from));
float offset = point.x();
for (int i = 0; i < numGlyphs; i++) {
glyphs[i].x = offset;
glyphs[i].y = point.y();
offset += glyphBuffer.advanceAt(from + i);
}
PlatformContextCairo* platformContext = context->platformContext();
drawGlyphsShadow(context, point, font, glyphs, numGlyphs);
cairo_t* cr = platformContext->cr();
cairo_save(cr);
if (context->textDrawingMode() & TextModeFill) {
platformContext->prepareForFilling(context->state(), PlatformContextCairo::AdjustPatternForGlobalAlpha);
drawGlyphsToContext(cr, font, glyphs, numGlyphs);
}
if (context->textDrawingMode() & TextModeStroke && context->strokeThickness() < 2 * offset) {
platformContext->prepareForStroking(context->state());
cairo_set_line_width(cr, context->strokeThickness());
cairo_set_scaled_font(cr, font->platformData().scaledFont());
cairo_glyph_path(cr, glyphs, numGlyphs);
cairo_stroke(cr);
}
cairo_restore(cr);
}
}