diff options
Diffstat (limited to 'src/cairo-win32-font.c')
| -rw-r--r-- | src/cairo-win32-font.c | 133 |
1 files changed, 128 insertions, 5 deletions
diff --git a/src/cairo-win32-font.c b/src/cairo-win32-font.c index eef2b4e72..385297ee2 100644 --- a/src/cairo-win32-font.c +++ b/src/cairo-win32-font.c @@ -1101,13 +1101,136 @@ _cairo_win32_scaled_font_show_glyphs (void *abstract_font, } } +static cairo_fixed_t +_cairo_fixed_from_FIXED (FIXED f) +{ + return *((cairo_fixed_t *)&f); +} + static cairo_status_t -_cairo_win32_scaled_font_glyph_path (void *abstract_font, - cairo_glyph_t *glyphs, - int num_glyphs, - cairo_path_fixed_t *path) +_cairo_win32_scaled_font_glyph_path (void *abstract_font, + cairo_glyph_t *glyphs, + int num_glyphs, + cairo_path_fixed_t *path) { - return CAIRO_STATUS_SUCCESS; + static const MAT2 matrix = { { 0, 1 }, { 0, 0 }, { 0, 0 }, { 0, -1 } }; + cairo_win32_scaled_font_t *scaled_font = abstract_font; + cairo_status_t status; + GLYPHMETRICS metrics; + HDC hdc; + int i; + + hdc = _get_global_font_dc (); + if (!hdc) + return CAIRO_STATUS_NO_MEMORY; + + status = cairo_win32_scaled_font_select_font (&scaled_font->base, hdc); + if (status) + return status; + + for (i = 0; i < num_glyphs; i++) + { + DWORD bytesGlyph; + unsigned char *buffer, *ptr; + + cairo_fixed_t x = _cairo_fixed_from_double (glyphs[i].x); + cairo_fixed_t y = _cairo_fixed_from_double (glyphs[i].y); + + bytesGlyph = GetGlyphOutlineW (hdc, glyphs[i].index, + GGO_NATIVE | GGO_GLYPH_INDEX, + &metrics, 0, NULL, &matrix); + + if (bytesGlyph == GDI_ERROR) { + status = _cairo_win32_print_gdi_error ("_cairo_win32_scaled_font_glyph_path"); + goto FAIL; + } + + ptr = buffer = malloc (bytesGlyph); + + if (!buffer) { + status = CAIRO_STATUS_NO_MEMORY; + goto FAIL; + } + + if (GetGlyphOutlineW (hdc, glyphs[i].index, + GGO_NATIVE | GGO_GLYPH_INDEX, + &metrics, bytesGlyph, buffer, &matrix) == GDI_ERROR) { + status = _cairo_win32_print_gdi_error ("_cairo_win32_scaled_font_glyph_path"); + free (buffer); + goto FAIL; + } + + while (ptr < buffer + bytesGlyph) { + TTPOLYGONHEADER *header = (TTPOLYGONHEADER *)ptr; + unsigned char *endPoly = ptr + header->cb; + + ptr += sizeof (TTPOLYGONHEADER); + + _cairo_path_fixed_move_to (path, + _cairo_fixed_from_FIXED (header->pfxStart.x) + x, + _cairo_fixed_from_FIXED (header->pfxStart.y) + y); + + while (ptr < endPoly) { + TTPOLYCURVE *curve = (TTPOLYCURVE *)ptr; + POINTFX *points = curve->apfx; + int i; + switch (curve->wType) { + case TT_PRIM_LINE: + for (i = 0; i < curve->cpfx; i++) { + _cairo_path_fixed_line_to (path, + _cairo_fixed_from_FIXED (points[i].x) + x, + _cairo_fixed_from_FIXED (points[i].y) + y); + } + break; + case TT_PRIM_QSPLINE: + for (i = 0; i < curve->cpfx - 1; i++) { + cairo_fixed_t p1x, p1y, p2x, p2y, cx, cy, c1x, c1y, c2x, c2y; + _cairo_path_fixed_get_current_point (path, &p1x, &p1y); + cx = _cairo_fixed_from_FIXED (points[i].x) + x; + cy = _cairo_fixed_from_FIXED (points[i].y) + y; + + if (i + 1 == curve->cpfx - 1) { + p2x = _cairo_fixed_from_FIXED (points[i + 1].x) + x; + p2y = _cairo_fixed_from_FIXED (points[i + 1].y) + y; + } else { + /* records with more than one curve use interpolation for + control points, per http://support.microsoft.com/kb/q87115/ */ + p2x = (cx + _cairo_fixed_from_FIXED (points[i + 1].x) + x) / 2; + p2y = (cy + _cairo_fixed_from_FIXED (points[i + 1].y) + y) / 2; + } + + c1x = 2 * cx / 3 + p1x / 3; + c1y = 2 * cy / 3 + p1y / 3; + c2x = 2 * cx / 3 + p2x / 3; + c2y = 2 * cy / 3 + p2y / 3; + + _cairo_path_fixed_curve_to (path, c1x, c1y, c2x, c2y, p2x, p2y); + } + break; + case TT_PRIM_CSPLINE: + for (i = 0; i < curve->cpfx - 2; i += 2) { + _cairo_path_fixed_curve_to (path, + _cairo_fixed_from_FIXED (points[i].x) + x, + _cairo_fixed_from_FIXED (points[i].y) + y, + _cairo_fixed_from_FIXED (points[i + 1].x) + x, + _cairo_fixed_from_FIXED (points[i + 1].y) + y, + _cairo_fixed_from_FIXED (points[i + 2].x) + x, + _cairo_fixed_from_FIXED (points[i + 2].y) + y); + } + break; + } + ptr += sizeof(TTPOLYCURVE) + sizeof (POINTFX) * (curve->cpfx - 1); + } + _cairo_path_fixed_close_path (path); + } + free(buffer); + } + +FAIL: + + cairo_win32_scaled_font_done_font (&scaled_font->base); + + return status; } const cairo_scaled_font_backend_t cairo_win32_scaled_font_backend = { |