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 cairo_bool_t check_glyphs (cairo_composite_rectangles_t *composite,
cairo_scaled_font_t *scaled_font)
{
if (! _cairo_clip_is_region (composite->clip))
return FALSE;
if (cairo_scaled_font_get_type (scaled_font) != CAIRO_FONT_TYPE_WIN32)
return FALSE;
if (! _cairo_pattern_is_opaque_solid (&composite->source_pattern.base))
return FALSE;
return (composite->op == CAIRO_OPERATOR_CLEAR ||
composite->op == CAIRO_OPERATOR_SOURCE ||
composite->op == CAIRO_OPERATOR_OVER);
}
int32_t ScaledFont::getType()
{
return static_cast<int32_t>( cairo_scaled_font_get_type( mCairoScaledFont ) );
}
cairo_int_status_t
_cairo_win32_surface_emit_glyphs (cairo_win32_surface_t *dst,
const cairo_pattern_t *source,
cairo_glyph_t *glyphs,
int num_glyphs,
cairo_scaled_font_t *scaled_font,
cairo_bool_t glyph_indexing)
{
#if CAIRO_HAS_WIN32_FONT
WORD glyph_buf_stack[STACK_GLYPH_SIZE];
WORD *glyph_buf = glyph_buf_stack;
int dxy_buf_stack[2 * STACK_GLYPH_SIZE];
int *dxy_buf = dxy_buf_stack;
BOOL win_result = 0;
int i, j;
cairo_solid_pattern_t *solid_pattern;
COLORREF color;
cairo_matrix_t device_to_logical;
int start_x, start_y;
double user_x, user_y;
int logical_x, logical_y;
unsigned int glyph_index_option;
/* We can only handle win32 fonts */
assert (cairo_scaled_font_get_type (scaled_font) == CAIRO_FONT_TYPE_WIN32);
/* We can only handle opaque solid color sources and destinations */
assert (_cairo_pattern_is_opaque_solid(source));
assert (dst->format == CAIRO_FORMAT_RGB24);
solid_pattern = (cairo_solid_pattern_t *)source;
color = RGB(((int)solid_pattern->color.red_short) >> 8,
((int)solid_pattern->color.green_short) >> 8,
((int)solid_pattern->color.blue_short) >> 8);
cairo_win32_scaled_font_get_device_to_logical(scaled_font, &device_to_logical);
SaveDC(dst->dc);
cairo_win32_scaled_font_select_font(scaled_font, dst->dc);
SetTextColor(dst->dc, color);
SetTextAlign(dst->dc, TA_BASELINE | TA_LEFT);
SetBkMode(dst->dc, TRANSPARENT);
if (num_glyphs > STACK_GLYPH_SIZE) {
glyph_buf = (WORD *) _cairo_malloc_ab (num_glyphs, sizeof(WORD));
dxy_buf = (int *) _cairo_malloc_abc (num_glyphs, sizeof(int), 2);
}
/* It is vital that dx values for dxy_buf are calculated from the delta of
* _logical_ x coordinates (not user x coordinates) or else the sum of all
* previous dx values may start to diverge from the current glyph's x
* coordinate due to accumulated rounding error. As a result strings could
* be painted shorter or longer than expected. */
user_x = glyphs[0].x;
user_y = glyphs[0].y;
cairo_matrix_transform_point(&device_to_logical,
&user_x, &user_y);
logical_x = _cairo_lround (user_x);
logical_y = _cairo_lround (user_y);
start_x = logical_x;
start_y = logical_y;
for (i = 0, j = 0; i < num_glyphs; ++i, j = 2 * i) {
glyph_buf[i] = (WORD) glyphs[i].index;
if (i == num_glyphs - 1) {
dxy_buf[j] = 0;
dxy_buf[j+1] = 0;
} else {
double next_user_x = glyphs[i+1].x;
double next_user_y = glyphs[i+1].y;
int next_logical_x, next_logical_y;
cairo_matrix_transform_point(&device_to_logical,
&next_user_x, &next_user_y);
next_logical_x = _cairo_lround (next_user_x);
next_logical_y = _cairo_lround (next_user_y);
dxy_buf[j] = _cairo_lround (next_logical_x - logical_x);
dxy_buf[j+1] = _cairo_lround (next_logical_y - logical_y);
logical_x = next_logical_x;
logical_y = next_logical_y;
}
}
if (glyph_indexing)
glyph_index_option = ETO_GLYPH_INDEX;
else
glyph_index_option = 0;
win_result = ExtTextOutW(dst->dc,
start_x,
start_y,
glyph_index_option | ETO_PDY,
NULL,
glyph_buf,
num_glyphs,
dxy_buf);
if (!win_result) {
_cairo_win32_print_gdi_error("_cairo_win32_surface_show_glyphs(ExtTextOutW failed)");
}
RestoreDC(dst->dc, -1);
if (glyph_buf != glyph_buf_stack) {
free(glyph_buf);
free(dxy_buf);
}
return (win_result) ? CAIRO_STATUS_SUCCESS : CAIRO_INT_STATUS_UNSUPPORTED;
#else
return CAIRO_INT_STATUS_UNSUPPORTED;
#endif
}
