static void
text_layout_extents(struct text_layout *layout, cairo_text_extents_t *extents)
{
cairo_scaled_font_glyph_extents(layout->font,
layout->glyphs, layout->num_glyphs,
extents);
}
static void
text_layout_index_to_pos(struct text_layout *layout, uint32_t index, cairo_rectangle_t *pos)
{
cairo_text_extents_t extents;
int glyph_index = glyphs_from_bytes(layout, index);
if (!pos)
return;
cairo_scaled_font_glyph_extents(layout->font,
layout->glyphs, layout->num_glyphs,
&extents);
if (glyph_index >= layout->num_glyphs) {
pos->x = extents.x_advance;
pos->y = layout->num_glyphs ? layout->glyphs[layout->num_glyphs - 1].y : 0;
pos->width = 1;
pos->height = extents.height;
return;
}
pos->x = layout->glyphs[glyph_index].x;
pos->y = layout->glyphs[glyph_index].y;
pos->width = glyph_index < layout->num_glyphs - 1 ? layout->glyphs[glyph_index + 1].x : extents.x_advance - pos->x;
pos->height = extents.height;
}
static int
text_layout_xy_to_index(struct text_layout *layout, double x, double y)
{
cairo_text_extents_t extents;
int i;
double d;
if (layout->num_glyphs == 0)
return 0;
cairo_scaled_font_glyph_extents(layout->font,
layout->glyphs, layout->num_glyphs,
&extents);
if (x < 0)
return 0;
for (i = 0; i < layout->num_glyphs - 1; ++i) {
d = layout->glyphs[i + 1].x - layout->glyphs[i].x;
if (x < layout->glyphs[i].x + d/2)
return bytes_from_glyphs(layout, i);
}
d = extents.width - layout->glyphs[layout->num_glyphs - 1].x;
if (x < layout->glyphs[layout->num_glyphs - 1].x + d/2)
return bytes_from_glyphs(layout, layout->num_glyphs - 1);
return bytes_from_glyphs(layout, layout->num_glyphs);
}
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 (!graphicsContext->mustUseShadowBlur()) {
// Optimize non-blurry shadows, by just drawing text without the ShadowBlur.
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);
}
}
size_t render(const string& text, double x = 0.0, double y = 0.0) override {
cairo_glyph_t* glyphs{nullptr};
cairo_text_cluster_t* clusters{nullptr};
cairo_text_cluster_flags_t cf{};
int nglyphs = 0, nclusters = 0;
string utf8 = string(text);
auto status = cairo_scaled_font_text_to_glyphs(
m_scaled, x, y, utf8.c_str(), utf8.size(), &glyphs, &nglyphs, &clusters, &nclusters, &cf);
if (status != CAIRO_STATUS_SUCCESS) {
throw application_error(sstream() << "cairo_scaled_font_text_to_glyphs()" << cairo_status_to_string(status));
}
size_t bytes = 0;
for (int g = 0; g < nglyphs; g++) {
if (glyphs[g].index) {
bytes += clusters[g].num_bytes;
} else {
break;
}
}
if (bytes && bytes < text.size()) {
cairo_glyph_free(glyphs);
cairo_text_cluster_free(clusters);
utf8 = text.substr(0, bytes);
auto status = cairo_scaled_font_text_to_glyphs(
m_scaled, x, y, utf8.c_str(), utf8.size(), &glyphs, &nglyphs, &clusters, &nclusters, &cf);
if (status != CAIRO_STATUS_SUCCESS) {
throw application_error(sstream() << "cairo_scaled_font_text_to_glyphs()" << cairo_status_to_string(status));
}
}
if (bytes) {
// auto lock = make_unique<utils::device_lock>(cairo_surface_get_device(cairo_get_target(m_cairo)));
// if (lock.get()) {
// cairo_glyph_path(m_cairo, glyphs, nglyphs);
// }
cairo_text_extents_t extents{};
cairo_scaled_font_glyph_extents(m_scaled, glyphs, nglyphs, &extents);
cairo_show_text_glyphs(m_cairo, utf8.c_str(), utf8.size(), glyphs, nglyphs, clusters, nclusters, cf);
cairo_fill(m_cairo);
cairo_move_to(m_cairo, x + extents.x_advance, 0.0);
}
cairo_glyph_free(glyphs);
cairo_text_cluster_free(clusters);
return bytes;
}
float SimpleFontData::platformWidthForGlyph(Glyph glyph) const
{
ASSERT(m_platformData.m_scaledFont);
cairo_glyph_t cglyph = { glyph, 0, 0 };
cairo_text_extents_t extents;
cairo_scaled_font_glyph_extents(m_platformData.m_scaledFont, &cglyph, 1, &extents);
float w = (float)m_spaceWidth;
if (cairo_scaled_font_status(m_platformData.m_scaledFont) == CAIRO_STATUS_SUCCESS && extents.x_advance != 0)
w = (float)extents.x_advance;
return w;
}
float SimpleFontData::platformWidthForGlyph(Glyph glyph) const
{
if (!m_platformData.size())
return 0;
if (cairo_scaled_font_status(m_platformData.scaledFont()) != CAIRO_STATUS_SUCCESS)
return m_spaceWidth;
cairo_glyph_t cairoGlyph = { glyph, 0, 0 };
cairo_text_extents_t extents;
cairo_scaled_font_glyph_extents(m_platformData.scaledFont(), &cairoGlyph, 1, &extents);
float width = platformData().orientation() == Horizontal ? extents.x_advance : -extents.y_advance;
return width ? width : m_spaceWidth;
}
FloatRect SimpleFontData::platformBoundsForGlyph(Glyph glyph) const
{
if (!m_platformData.size())
return FloatRect();
cairo_glyph_t cglyph = { glyph, 0, 0 };
cairo_text_extents_t extents;
cairo_scaled_font_glyph_extents(m_platformData.scaledFont(), &cglyph, 1, &extents);
if (cairo_scaled_font_status(m_platformData.scaledFont()) == CAIRO_STATUS_SUCCESS)
return FloatRect(extents.x_bearing, extents.y_bearing, extents.width, extents.height);
return FloatRect();
}
void
ScaledFontBase::GetGlyphDesignMetrics(const uint16_t* aGlyphs, uint32_t aNumGlyphs, GlyphMetrics* aGlyphMetrics)
{
#ifdef USE_CAIRO_SCALED_FONT
if (mScaledFont) {
for (uint32_t i = 0; i < aNumGlyphs; i++) {
cairo_glyph_t glyph;
cairo_text_extents_t extents;
glyph.index = aGlyphs[i];
glyph.x = 0;
glyph.y = 0;
cairo_scaled_font_glyph_extents(mScaledFont, &glyph, 1, &extents);
aGlyphMetrics[i].mXBearing = extents.x_bearing;
aGlyphMetrics[i].mXAdvance = extents.x_advance;
aGlyphMetrics[i].mYBearing = extents.y_bearing;
aGlyphMetrics[i].mYAdvance = extents.y_advance;
aGlyphMetrics[i].mWidth = extents.width;
aGlyphMetrics[i].mHeight = extents.height;
cairo_font_options_t *options = cairo_font_options_create();
cairo_scaled_font_get_font_options(mScaledFont, options);
if (cairo_font_options_get_antialias(options) != CAIRO_ANTIALIAS_NONE) {
if (cairo_scaled_font_get_type(mScaledFont) == CAIRO_FONT_TYPE_WIN32) {
if (aGlyphMetrics[i].mWidth > 0 && aGlyphMetrics[i].mHeight > 0) {
aGlyphMetrics[i].mWidth -= 3.0f;
aGlyphMetrics[i].mXBearing += 1.0f;
}
}
#if defined(MOZ2D_HAS_MOZ_CAIRO) && defined(CAIRO_HAS_DWRITE_FONT)
else if (cairo_scaled_font_get_type(mScaledFont) == CAIRO_FONT_TYPE_DWRITE) {
if (aGlyphMetrics[i].mWidth > 0 && aGlyphMetrics[i].mHeight > 0) {
aGlyphMetrics[i].mWidth -= 2.0f;
aGlyphMetrics[i].mXBearing += 1.0f;
}
}
#endif
}
cairo_font_options_destroy(options);
}
}
#endif
// Don't know how to get the glyph metrics...
MOZ_CRASH("The specific backend type is not supported for GetGlyphDesignMetrics.");
}
static void
compute_glyph_extents (PangoFont *font,
PangoGlyph glyph,
PangoRectangle *ink_rect,
PangoRectangle *logical_rect)
{
PangoCairoFont *cfont = (PangoCairoFont *)font;
cairo_scaled_font_t *scaled_font = pango_cairo_win32_font_get_scaled_font (PANGO_CAIRO_FONT (cfont));
/* It may well be worth caching the font_extents here, since getting them
* is pretty expensive.
*/
cairo_font_extents_t font_extents;
cairo_text_extents_t extents;
cairo_glyph_t cairo_glyph;
cairo_scaled_font_extents (scaled_font, &font_extents);
logical_rect->x = 0;
logical_rect->y = - font_extents.ascent * PANGO_SCALE;
logical_rect->width = 0;
logical_rect->height = (font_extents.ascent + font_extents.descent) * PANGO_SCALE;
if (glyph == PANGO_GLYPH_EMPTY)
{
/* already initialized above */
}
else if (glyph & PANGO_GLYPH_UNKNOWN_FLAG)
{
/* space for the hex box */
_pango_cairo_get_glyph_extents_missing(cfont, glyph, ink_rect, logical_rect);
}
else
{
cairo_glyph.index = glyph;
cairo_glyph.x = 0;
cairo_glyph.y = 0;
cairo_scaled_font_glyph_extents (scaled_font,
&cairo_glyph, 1, &extents);
ink_rect->x = extents.x_bearing * PANGO_SCALE;
ink_rect->y = extents.y_bearing * PANGO_SCALE;
ink_rect->width = extents.width * PANGO_SCALE;
ink_rect->height = extents.height * PANGO_SCALE;
logical_rect->width = extents.x_advance * PANGO_SCALE;
}
}
void
gfxFT2FontBase::GetGlyphExtents(PRUint32 aGlyph, cairo_text_extents_t* aExtents)
{
NS_PRECONDITION(aExtents != NULL, "aExtents must not be NULL");
cairo_glyph_t glyphs[1];
glyphs[0].index = aGlyph;
glyphs[0].x = 0.0;
glyphs[0].y = 0.0;
// cairo does some caching for us here but perhaps a small gain could be
// made by caching more. It is usually only the advance that is needed,
// so caching only the advance could allow many requests to be cached with
// little memory use. Ideally this cache would be merged with
// gfxGlyphExtents.
cairo_scaled_font_glyph_extents(CairoScaledFont(), glyphs, 1, aExtents);
}
void SkScalerContext_CairoFT::generateMetrics(SkGlyph* glyph)
{
SkASSERT(fScaledFont != NULL);
cairo_text_extents_t extents;
cairo_glyph_t cairoGlyph = { glyph->getGlyphID(), 0.0, 0.0 };
cairo_scaled_font_glyph_extents(fScaledFont, &cairoGlyph, 1, &extents);
glyph->fAdvanceX = SkDoubleToFixed(extents.x_advance);
glyph->fAdvanceY = SkDoubleToFixed(extents.y_advance);
glyph->fWidth = SkToU16(SkScalarCeilToInt(extents.width));
glyph->fHeight = SkToU16(SkScalarCeilToInt(extents.height));
glyph->fLeft = SkToS16(SkScalarCeilToInt(extents.x_bearing));
glyph->fTop = SkToS16(SkScalarCeilToInt(extents.y_bearing));
glyph->fLsbDelta = 0;
glyph->fRsbDelta = 0;
}
/**
* cairo_scaled_font_text_extents:
* @scaled_font: a #cairo_scaled_font_t
* @utf8: a string of text, encoded in UTF-8
* @extents: a #cairo_text_extents_t which to store the retrieved extents.
*
* Gets the extents for a string of text. The extents describe a
* user-space rectangle that encloses the "inked" portion of the text
* drawn at the origin (0,0) (as it would be drawn by cairo_show_text()
* if the cairo graphics state were set to the same font_face,
* font_matrix, ctm, and font_options as @scaled_font). Additionally,
* the x_advance and y_advance values indicate the amount by which the
* current point would be advanced by cairo_show_text().
*
* Note that whitespace characters do not directly contribute to the
* size of the rectangle (extents.width and extents.height). They do
* contribute indirectly by changing the position of non-whitespace
* characters. In particular, trailing whitespace characters are
* likely to not affect the size of the rectangle, though they will
* affect the x_advance and y_advance values.
**/
void
cairo_scaled_font_text_extents (cairo_scaled_font_t *scaled_font,
const char *utf8,
cairo_text_extents_t *extents)
{
cairo_status_t status = CAIRO_STATUS_SUCCESS;
cairo_glyph_t *glyphs;
int num_glyphs;
status = _cairo_scaled_font_text_to_glyphs (scaled_font, 0., 0., utf8, &glyphs, &num_glyphs);
if (status) {
_cairo_scaled_font_set_error (scaled_font, status);
return;
}
cairo_scaled_font_glyph_extents (scaled_font, glyphs, num_glyphs, extents);
free (glyphs);
}
static double
count_glyphs (double font_size,
cairo_antialias_t antialias,
cairo_t *cr, int width, int height)
{
const char text[] = "the jay, pig, fox, zebra and my wolves quack";
cairo_scaled_font_t *scaled_font;
cairo_glyph_t *glyphs = NULL;
cairo_text_extents_t extents;
cairo_font_options_t *options;
cairo_status_t status;
int num_glyphs;
int glyphs_per_line, lines_per_loop;
options = cairo_font_options_create ();
cairo_font_options_set_antialias (options, antialias);
cairo_set_font_options (cr, options);
cairo_font_options_destroy (options);
cairo_select_font_face (cr,
"@cairo:",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size (cr, font_size);
scaled_font = cairo_get_scaled_font (cr);
status = cairo_scaled_font_text_to_glyphs (scaled_font, 0., 0.,
text, -1,
&glyphs, &num_glyphs,
NULL, NULL,
NULL);
if (status)
return 0;
cairo_scaled_font_glyph_extents (scaled_font,
glyphs, num_glyphs,
&extents);
cairo_glyph_free (glyphs);
glyphs_per_line = num_glyphs * width / extents.width + 1;
lines_per_loop = height / extents.height + 1;
return glyphs_per_line * lines_per_loop / 1000.; /* kiloglyphs */
}
/* Fills in the glyph extents cache entry
*/
static void
compute_glyph_extents (PangoCairoFontPrivate *cf_priv,
PangoGlyph glyph,
PangoCairoFontGlyphExtentsCacheEntry *entry)
{
cairo_text_extents_t extents;
cairo_glyph_t cairo_glyph;
cairo_glyph.index = glyph;
cairo_glyph.x = 0;
cairo_glyph.y = 0;
cairo_scaled_font_glyph_extents (_pango_cairo_font_private_get_scaled_font (cf_priv),
&cairo_glyph, 1, &extents);
entry->glyph = glyph;
entry->width = pango_units_from_double (extents.x_advance);
entry->ink_rect.x = pango_units_from_double (extents.x_bearing);
entry->ink_rect.y = pango_units_from_double (extents.y_bearing);
entry->ink_rect.width = pango_units_from_double (extents.width);
entry->ink_rect.height = pango_units_from_double (extents.height);
}
/**
* layout a text with provided parameters
*
* @param cr: the cairo instance
* @param text: the text to layout
* @param font: the font to use to layout to
* @param size: the font size size of each char to layout
* @param bounds: the bounds of layouting
* @param alignment: the text alignment on cairo's buffer
* @param layout: the returned layouted text instance
* @param-opt breakOnOverflow: break the layouting if size overflow the provided bounds
*/
void TextLayouter::layout(cairo_t *cr, const char *text, Font_t *font, int32_t size, Rectangle bounds, const TextAlignment &alignment, LayoutedText *layout, bool breakOnOverflow)
{
// check font validity
if (!font) return;
// get text length
size_t textLen = strlen(text);
// starting coordinates
int x = bounds.x;
int y = bounds.y;
int lineStartX = x;
// created the scaled font face
cairo_set_font_face(cr, font->getFace());
cairo_set_font_size(cr, size);
cairo_scaled_font_t *scaledFace = cairo_get_scaled_font(cr);
int line = 0;
int lineHeight = size;
// create glyphs for the text
cairo_glyph_t *previousGlyphBuffer = layout->glyphBuffer;
cairo_text_cluster_t *previousClusterBuffer = layout->clusterBuffer;
cairo_text_cluster_flags_t clusterFlags;
cairo_status_t stat = cairo_scaled_font_text_to_glyphs(scaledFace, 0, 0, text, textLen, &layout->glyphBuffer, &layout->glyphCount, &layout->clusterBuffer, &layout->clusterCount, &clusterFlags);
// free old buffer
if (previousGlyphBuffer != nullptr && layout->glyphBuffer != previousGlyphBuffer) free(previousGlyphBuffer);
if (previousClusterBuffer != nullptr && layout->clusterBuffer != previousClusterBuffer) free(previousClusterBuffer);
// clear layout entries
layout->positions.clear();
// perform layouting
if (stat == CAIRO_STATUS_SUCCESS)
{
// positions in bytes and glyphs
size_t bytePos = 0;
size_t glyphPos = 0;
// text extents
cairo_text_extents_t extents;
for (int i = 0; i < layout->clusterCount; i++)
{
cairo_text_cluster_t *cluster = &layout->clusterBuffer[i];
cairo_glyph_t *glyphs = &layout->glyphBuffer[glyphPos];
// create new position
PositionedGlyph positioned;
positioned.glyph = glyphs;
positioned.glyphCount = cluster->num_glyphs;
cairo_scaled_font_glyph_extents(scaledFace, positioned.glyph, positioned.glyphCount, &extents);
positioned.advance.x = extents.x_advance;
positioned.advance.y = extents.y_advance;
positioned.size.width = extents.width;
positioned.size.height = extents.height;
// check if newline
bool isNewline = false;
if (cluster->num_bytes == 1 && text[bytePos] == '\n') isNewline = true;
bool invisible = false;
// Wouldn't match in line or is break character? Start next line
if (isNewline || (breakOnOverflow && (x + positioned.size.width > bounds.width)))
{
if (isNewline) invisible = true;
if (alignment == TextAlignment::RIGHT) rightAlign(layout, line, x - lineStartX, bounds);
else if (alignment == TextAlignment::CENTER) centerAlign(layout, line, x - lineStartX, bounds);
++line;
x = bounds.x;
lineStartX = x;
y += lineHeight;
}
if (!invisible)
{
// Position
positioned.line = line;
positioned.position.x = x;
positioned.position.y = y + lineHeight;
// Add position
layout->positions.push_back(positioned);
// Jump to next
x += positioned.advance.x;
}
// increase positions
glyphPos += cluster->num_glyphs;
bytePos += cluster->num_bytes;
}
}
if (alignment == TextAlignment::RIGHT) rightAlign(layout, line, x - lineStartX, bounds);
else if (alignment == TextAlignment::CENTER) centerAlign(layout, line, x - lineStartX, bounds);
// Set text bounds
#define BOUNDS_EMPTY 0xFFFFFF
int tbTop = BOUNDS_EMPTY;
int tbLeft = BOUNDS_EMPTY;
int tbRight = 0;
int tbBottom = 0;
for (PositionedGlyph &p : layout->positions)
{
if (p.position.x < tbLeft) tbLeft = p.position.x;
if (p.position.y < tbTop) tbTop = p.position.y;
// get extents again
int r = p.position.x + p.size.width;
if (r > tbRight) tbRight = r;
int b = p.position.y + p.size.height;
if (b > tbBottom) tbBottom = b;
}
if (tbTop != BOUNDS_EMPTY && tbLeft != BOUNDS_EMPTY)
{
layout->textBounds.x = tbLeft;
layout->textBounds.y = tbTop;
layout->textBounds.width = tbRight - tbLeft;
layout->textBounds.height = tbBottom - tbTop;
}
}
static cairo_test_status_t
draw (cairo_t *cr, int width, int height)
{
const cairo_test_context_t *ctx = cairo_test_get_context (cr);
cairo_text_extents_t extents, nil_extents;
cairo_font_extents_t font_extents, nil_font_extents;
cairo_scaled_font_t *scaled_font;
cairo_select_font_face (cr, "Bitstream Vera Sans",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size (cr, 16);
cairo_move_to (cr, 10, 25);
cairo_show_text (cr, NULL);
cairo_show_text (cr, "");
cairo_show_glyphs (cr, NULL, 0);
cairo_show_glyphs (cr, (void*)8, 0);
cairo_move_to (cr, 10, 55);
cairo_text_path (cr, NULL);
cairo_text_path (cr, "");
cairo_glyph_path (cr, (void*)8, 0);
cairo_fill (cr);
memset (&nil_extents, 0, sizeof (cairo_text_extents_t));
memset (&extents, 0xff, sizeof (cairo_text_extents_t));
cairo_text_extents (cr, "", &extents);
if (! text_extents_equal (&extents, &nil_extents)) {
cairo_test_log (ctx, "Error: cairo_text_extents(\"\"); extents (%g, %g, %g, %g, %g, %g)\n",
extents.x_bearing, extents.y_bearing,
extents.width, extents.height,
extents.x_advance, extents.y_advance);
return CAIRO_TEST_FAILURE;
}
memset (&extents, 0xff, sizeof (cairo_text_extents_t));
cairo_text_extents (cr, NULL, &extents);
if (! text_extents_equal (&extents, &nil_extents)) {
cairo_test_log (ctx, "Error: cairo_text_extents(NULL); extents (%g, %g, %g, %g, %g, %g)\n",
extents.x_bearing, extents.y_bearing,
extents.width, extents.height,
extents.x_advance, extents.y_advance);
return CAIRO_TEST_FAILURE;
}
memset (&extents, 0xff, sizeof (cairo_text_extents_t));
cairo_glyph_extents (cr, (void*)8, 0, &extents);
if (! text_extents_equal (&extents, &nil_extents)) {
cairo_test_log (ctx, "Error: cairo_glyph_extents(); extents (%g, %g, %g, %g, %g, %g)\n",
extents.x_bearing, extents.y_bearing,
extents.width, extents.height,
extents.x_advance, extents.y_advance);
return CAIRO_TEST_FAILURE;
}
scaled_font = cairo_get_scaled_font (cr);
memset (&extents, 0xff, sizeof (cairo_text_extents_t));
cairo_scaled_font_text_extents (scaled_font, "", &extents);
if (! text_extents_equal (&extents, &nil_extents)) {
cairo_test_log (ctx, "Error: cairo_scaled_font_text_extents(\"\"); extents (%g, %g, %g, %g, %g, %g)\n",
extents.x_bearing, extents.y_bearing,
extents.width, extents.height,
extents.x_advance, extents.y_advance);
return CAIRO_TEST_FAILURE;
}
memset (&extents, 0xff, sizeof (cairo_text_extents_t));
cairo_scaled_font_text_extents (scaled_font, NULL, &extents);
if (! text_extents_equal (&extents, &nil_extents)) {
cairo_test_log (ctx, "Error: cairo_scaled_font_text_extents(NULL); extents (%g, %g, %g, %g, %g, %g)\n",
extents.x_bearing, extents.y_bearing,
extents.width, extents.height,
extents.x_advance, extents.y_advance);
return CAIRO_TEST_FAILURE;
}
memset (&extents, 0xff, sizeof (cairo_text_extents_t));
cairo_scaled_font_glyph_extents (scaled_font, (void*)8, 0, &extents);
if (! text_extents_equal (&extents, &nil_extents)) {
cairo_test_log (ctx, "Error: cairo_scaled_font_glyph_extents(NULL); extents (%g, %g, %g, %g, %g, %g)\n",
extents.x_bearing, extents.y_bearing,
extents.width, extents.height,
extents.x_advance, extents.y_advance);
return CAIRO_TEST_FAILURE;
}
/* Lets also try font size 0 while here */
cairo_set_font_size (cr, 0);
memset (&extents, 0xff, sizeof (cairo_text_extents_t));
cairo_text_extents (cr, "test", &extents);
if (! text_extents_equal (&extents, &nil_extents)) {
cairo_test_log (ctx, "Error: cairo_set_font_size(0); cairo_text_extents(\"test\"); extents (%g, %g, %g, %g, %g, %g)\n",
extents.x_bearing, extents.y_bearing,
extents.width, extents.height,
extents.x_advance, extents.y_advance);
return CAIRO_TEST_FAILURE;
}
memset (&nil_font_extents, 0, sizeof (cairo_font_extents_t));
memset (&font_extents, 0xff, sizeof (cairo_font_extents_t));
cairo_font_extents (cr, &font_extents);
if (! font_extents_equal (&font_extents, &nil_font_extents)) {
cairo_test_log (ctx, "Error: cairo_set_font_size(0); cairo_font_extents(); extents (%g, %g, %g, %g, %g)\n",
font_extents.ascent, font_extents.descent,
font_extents.height,
font_extents.max_x_advance, font_extents.max_y_advance);
return CAIRO_TEST_FAILURE;
}
scaled_font = cairo_get_scaled_font (cr);
memset (&font_extents, 0xff, sizeof (cairo_font_extents_t));
cairo_scaled_font_extents (scaled_font, &font_extents);
if (! font_extents_equal (&font_extents, &nil_font_extents)) {
cairo_test_log (ctx, "Error: cairo_set_font_size(0); cairo_scaled_font_extents(); extents (%g, %g, %g, %g, %g)\n",
font_extents.ascent, font_extents.descent,
font_extents.height,
font_extents.max_x_advance, font_extents.max_y_advance);
return CAIRO_TEST_FAILURE;
}
return CAIRO_TEST_SUCCESS;
}
static cairo_time_t
do_glyphs (double font_size,
cairo_antialias_t antialias,
cairo_t *cr, int width, int height, int loops)
{
const char text[] = "the jay, pig, fox, zebra and my wolves quack";
cairo_scaled_font_t *scaled_font;
cairo_glyph_t *glyphs = NULL, *glyphs_copy;
cairo_text_extents_t extents;
cairo_font_options_t *options;
cairo_status_t status;
double x, y;
int num_glyphs, n;
options = cairo_font_options_create ();
cairo_font_options_set_antialias (options, antialias);
cairo_set_font_options (cr, options);
cairo_font_options_destroy (options);
cairo_select_font_face (cr,
"@cairo:",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size (cr, font_size);
scaled_font = cairo_get_scaled_font (cr);
status = cairo_scaled_font_text_to_glyphs (scaled_font, 0., 0.,
text, -1,
&glyphs, &num_glyphs,
NULL, NULL,
NULL);
if (status)
return 0;
glyphs_copy = cairo_glyph_allocate (num_glyphs);
if (glyphs_copy == NULL) {
cairo_glyph_free (glyphs);
return 0;
}
cairo_scaled_font_glyph_extents (scaled_font,
glyphs, num_glyphs,
&extents);
cairo_perf_timer_start ();
while (loops--) {
y = 0;
do {
x = 0;
do {
for (n = 0; n < num_glyphs; n++) {
glyphs_copy[n] = glyphs[n];
glyphs_copy[n].x += x;
glyphs_copy[n].y += y;
}
cairo_show_glyphs (cr, glyphs_copy, num_glyphs);
x += extents.width;
} while (x < width);
y += extents.height;
} while (y < height);
}
cairo_perf_timer_stop ();
cairo_glyph_free (glyphs);
cairo_glyph_free (glyphs_copy);
return cairo_perf_timer_elapsed ();
}
void Font::drawGlyphs(GraphicsContext* context, const SimpleFontData* font, const GlyphBuffer& glyphBuffer,
int from, int numGlyphs, const FloatPoint& point) const
{
cairo_t* cr = context->platformContext();
cairo_save(cr);
cairo_set_scaled_font(cr, font->platformData().scaledFont());
GlyphBufferGlyph* glyphs = (GlyphBufferGlyph*)glyphBuffer.glyphs(from);
float offset = 0.0f;
for (int i = 0; i < numGlyphs; i++) {
glyphs[i].x = offset;
glyphs[i].y = 0.0f;
offset += glyphBuffer.advanceAt(from + i);
}
Color fillColor = context->fillColor();
// Synthetic Oblique
if(font->platformData().syntheticOblique()) {
cairo_matrix_t mat = {1, 0, -tanf(SYNTHETIC_OBLIQUE_ANGLE * acosf(0) / 90), 1, point.x(), point.y()};
cairo_transform(cr, &mat);
} else {
cairo_translate(cr, point.x(), point.y());
}
// Text shadow, inspired by FontMac
FloatSize shadowOffset;
float shadowBlur = 0;
Color shadowColor;
bool hasShadow = context->textDrawingMode() & cTextFill
&& context->getShadow(shadowOffset, shadowBlur, shadowColor);
// TODO: Blur support
if (hasShadow) {
// Disable graphics context shadows (not yet implemented) and paint them manually
context->clearShadow();
Color shadowFillColor(shadowColor.red(), shadowColor.green(), shadowColor.blue(), shadowColor.alpha() * fillColor.alpha() / 255);
cairo_save(cr);
float red, green, blue, alpha;
shadowFillColor.getRGBA(red, green, blue, alpha);
cairo_set_source_rgba(cr, red, green, blue, alpha);
#if ENABLE(FILTERS)
cairo_text_extents_t extents;
cairo_scaled_font_glyph_extents(font->platformData().scaledFont(), glyphs, numGlyphs, &extents);
FloatRect rect(FloatPoint(), FloatSize(extents.width, extents.height));
IntSize shadowBufferSize;
FloatRect shadowRect;
float radius = 0;
context->calculateShadowBufferDimensions(shadowBufferSize, shadowRect, radius, rect, shadowOffset, shadowBlur);
// Draw shadow into a new ImageBuffer
OwnPtr<ImageBuffer> shadowBuffer = ImageBuffer::create(shadowBufferSize);
GraphicsContext* shadowContext = shadowBuffer->context();
cairo_t* shadowCr = shadowContext->platformContext();
cairo_translate(shadowCr, radius, extents.height + radius);
cairo_set_scaled_font(shadowCr, font->platformData().scaledFont());
cairo_show_glyphs(shadowCr, glyphs, numGlyphs);
if (font->syntheticBoldOffset()) {
cairo_save(shadowCr);
cairo_translate(shadowCr, font->syntheticBoldOffset(), 0);
cairo_show_glyphs(shadowCr, glyphs, numGlyphs);
cairo_restore(shadowCr);
}
cairo_translate(cr, 0.0, -extents.height);
context->applyPlatformShadow(shadowBuffer.release(), shadowColor, shadowRect, radius);
#else
cairo_translate(cr, shadowOffset.width(), shadowOffset.height());
cairo_show_glyphs(cr, glyphs, numGlyphs);
if (font->syntheticBoldOffset()) {
cairo_save(cr);
cairo_translate(cr, font->syntheticBoldOffset(), 0);
cairo_show_glyphs(cr, glyphs, numGlyphs);
cairo_restore(cr);
}
#endif
cairo_restore(cr);
}
if (context->textDrawingMode() & cTextFill) {
if (context->fillGradient()) {
cairo_set_source(cr, context->fillGradient()->platformGradient());
if (context->getAlpha() < 1.0f) {
cairo_push_group(cr);
cairo_paint_with_alpha(cr, context->getAlpha());
cairo_pop_group_to_source(cr);
}
} else if (context->fillPattern()) {
AffineTransform affine;
cairo_pattern_t* pattern = context->fillPattern()->createPlatformPattern(affine);
cairo_set_source(cr, pattern);
if (context->getAlpha() < 1.0f) {
cairo_push_group(cr);
cairo_paint_with_alpha(cr, context->getAlpha());
cairo_pop_group_to_source(cr);
}
cairo_pattern_destroy(pattern);
} else {
float red, green, blue, alpha;
fillColor.getRGBA(red, green, blue, alpha);
cairo_set_source_rgba(cr, red, green, blue, alpha * context->getAlpha());
}
cairo_show_glyphs(cr, glyphs, numGlyphs);
if (font->syntheticBoldOffset()) {
cairo_save(cr);
cairo_translate(cr, font->syntheticBoldOffset(), 0);
cairo_show_glyphs(cr, glyphs, numGlyphs);
cairo_restore(cr);
}
}
// Prevent running into a long computation within cairo. If the stroke width is
// twice the size of the width of the text we will not ask cairo to stroke
// the text as even one single stroke would cover the full wdth of the text.
// See https://bugs.webkit.org/show_bug.cgi?id=33759.
if (context->textDrawingMode() & cTextStroke && context->strokeThickness() < 2 * offset) {
if (context->strokeGradient()) {
cairo_set_source(cr, context->strokeGradient()->platformGradient());
if (context->getAlpha() < 1.0f) {
cairo_push_group(cr);
cairo_paint_with_alpha(cr, context->getAlpha());
cairo_pop_group_to_source(cr);
}
} else if (context->strokePattern()) {
AffineTransform affine;
cairo_pattern_t* pattern = context->strokePattern()->createPlatformPattern(affine);
cairo_set_source(cr, pattern);
if (context->getAlpha() < 1.0f) {
cairo_push_group(cr);
cairo_paint_with_alpha(cr, context->getAlpha());
cairo_pop_group_to_source(cr);
}
cairo_pattern_destroy(pattern);
} else {
Color strokeColor = context->strokeColor();
float red, green, blue, alpha;
strokeColor.getRGBA(red, green, blue, alpha);
cairo_set_source_rgba(cr, red, green, blue, alpha * context->getAlpha());
}
cairo_glyph_path(cr, glyphs, numGlyphs);
cairo_set_line_width(cr, context->strokeThickness());
cairo_stroke(cr);
}
// Re-enable the platform shadow we disabled earlier
if (hasShadow)
context->setShadow(shadowOffset, shadowBlur, shadowColor, DeviceColorSpace);
cairo_restore(cr);
}
static cairo_perf_ticks_t
do_glyphs (cairo_t *cr, int width, int height, int loops)
{
const char text[] = "the jay, pig, fox, zebra and my wolves quack";
cairo_scaled_font_t *scaled_font;
cairo_glyph_t *glyphs = NULL, *glyphs_copy;
cairo_text_extents_t extents;
cairo_status_t status;
double x, y;
int num_glyphs, n;
cairo_set_font_size (cr, 9);
scaled_font = cairo_get_scaled_font (cr);
status = cairo_scaled_font_text_to_glyphs (scaled_font, 0., 0.,
text, -1,
&glyphs, &num_glyphs,
NULL, NULL,
NULL);
if (status)
return 0;
glyphs_copy = cairo_glyph_allocate (num_glyphs);
if (glyphs_copy == NULL) {
cairo_glyph_free (glyphs);
return 0;
}
cairo_scaled_font_glyph_extents (scaled_font,
glyphs, num_glyphs,
&extents);
y = 0;
cairo_perf_timer_start ();
while (loops--) {
do {
x = 0;
do {
for (n = 0; n < num_glyphs; n++) {
glyphs_copy[n] = glyphs[n];
glyphs_copy[n].x += x;
glyphs_copy[n].y += y;
}
cairo_show_glyphs (cr, glyphs_copy, num_glyphs);
if (cairo_status (cr) != CAIRO_STATUS_SUCCESS)
goto out;
x += extents.width;
} while (x < width);
y += extents.height;
} while (y < height);
}
out:
cairo_perf_timer_stop ();
cairo_glyph_free (glyphs);
cairo_glyph_free (glyphs_copy);
return cairo_perf_timer_elapsed ();
}
