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openSUSE:Evergreen:11.1
seamonkey
mozilla-cairo-lcd.patch
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File mozilla-cairo-lcd.patch of Package seamonkey
# HG changeset patch # Parent 9cabb92310ded84c0108ccae23c170142997466b Subject: Add a Cairo LCD filter to use FreeType LCD colour filtering features References: https://bugzilla.mozilla.org/show_bug.cgi?id=404637 http://bugs.freedesktop.org/show_bug.cgi?id=10301 diff --git a/config/system-headers b/config/system-headers --- a/config/system-headers +++ b/config/system-headers @@ -258,16 +258,17 @@ Font.h Fonts.h fp.h fpieee.h frame/log.h frame/req.h freetype/freetype.h freetype/ftcache.h freetype/ftglyph.h +freetype/ftlcdfil.h freetype/ftsynth.h freetype/ftoutln.h freetype/ttnameid.h freetype/tttables.h freetype/t1tables.h fribidi/fribidi.h FSp_fopen.h fstream.h diff --git a/gfx/cairo/cairo/src/cairo-font-options.c b/gfx/cairo/cairo/src/cairo-font-options.c --- a/gfx/cairo/cairo/src/cairo-font-options.c +++ b/gfx/cairo/cairo/src/cairo-font-options.c @@ -34,41 +34,44 @@ * Owen Taylor <otaylor@redhat.com> */ #include "cairoint.h" static const cairo_font_options_t _cairo_font_options_nil = { CAIRO_ANTIALIAS_DEFAULT, CAIRO_SUBPIXEL_ORDER_DEFAULT, + CAIRO_LCD_FILTER_DEFAULT, CAIRO_HINT_STYLE_DEFAULT, CAIRO_HINT_METRICS_DEFAULT }; /** * _cairo_font_options_init_default: * @options: a #cairo_font_options_t * * Initializes all fields of the font options object to default values. **/ void _cairo_font_options_init_default (cairo_font_options_t *options) { options->antialias = CAIRO_ANTIALIAS_DEFAULT; options->subpixel_order = CAIRO_SUBPIXEL_ORDER_DEFAULT; + options->lcd_filter = CAIRO_LCD_FILTER_DEFAULT; options->hint_style = CAIRO_HINT_STYLE_DEFAULT; options->hint_metrics = CAIRO_HINT_METRICS_DEFAULT; } void _cairo_font_options_init_copy (cairo_font_options_t *options, const cairo_font_options_t *other) { options->antialias = other->antialias; options->subpixel_order = other->subpixel_order; + options->lcd_filter = other->lcd_filter; options->hint_style = other->hint_style; options->hint_metrics = other->hint_metrics; } /** * cairo_font_options_create: * * Allocates a new font options object with all options initialized @@ -184,16 +187,18 @@ cairo_font_options_merge (cairo_font_opt if (cairo_font_options_status ((cairo_font_options_t *) other)) return; if (other->antialias != CAIRO_ANTIALIAS_DEFAULT) options->antialias = other->antialias; if (other->subpixel_order != CAIRO_SUBPIXEL_ORDER_DEFAULT) options->subpixel_order = other->subpixel_order; + if (other->lcd_filter != CAIRO_LCD_FILTER_DEFAULT) + options->lcd_filter = other->lcd_filter; if (other->hint_style != CAIRO_HINT_STYLE_DEFAULT) options->hint_style = other->hint_style; if (other->hint_metrics != CAIRO_HINT_METRICS_DEFAULT) options->hint_metrics = other->hint_metrics; } slim_hidden_def (cairo_font_options_merge); /** @@ -216,16 +221,17 @@ cairo_font_options_equal (const cairo_fo if (cairo_font_options_status ((cairo_font_options_t *) other)) return FALSE; if (options == other) return TRUE; return (options->antialias == other->antialias && options->subpixel_order == other->subpixel_order && + options->lcd_filter == other->lcd_filter && options->hint_style == other->hint_style && options->hint_metrics == other->hint_metrics); } slim_hidden_def (cairo_font_options_equal); /** * cairo_font_options_hash: * @options: a #cairo_font_options_t @@ -241,17 +247,18 @@ slim_hidden_def (cairo_font_options_equa unsigned long cairo_font_options_hash (const cairo_font_options_t *options) { if (cairo_font_options_status ((cairo_font_options_t *) options)) options = &_cairo_font_options_nil; /* force default values */ return ((options->antialias) | (options->subpixel_order << 4) | - (options->hint_style << 8) | + (options->lcd_filter << 8) | + (options->hint_style << 12) | (options->hint_metrics << 16)); } slim_hidden_def (cairo_font_options_hash); /** * cairo_font_options_set_antialias: * @options: a #cairo_font_options_t * @antialias: the new antialiasing mode @@ -323,16 +330,58 @@ cairo_font_options_get_subpixel_order (c { if (cairo_font_options_status ((cairo_font_options_t *) options)) return CAIRO_SUBPIXEL_ORDER_DEFAULT; return options->subpixel_order; } /** + * _cairo_font_options_set_lcd_filter: + * @options: a #cairo_font_options_t + * @lcd_filter: the new LCD filter + * + * Sets the LCD filter for the font options object. The LCD filter + * specifies how pixels are filtered when rendered with an antialiasing + * mode of %CAIRO_ANTIALIAS_SUBPIXEL. See the documentation for + * #cairo_lcd_filter_t for full details. + * + * Since: 1.8 + **/ +void +_cairo_font_options_set_lcd_filter (cairo_font_options_t *options, + cairo_lcd_filter_t lcd_filter) +{ + if (cairo_font_options_status (options)) + return; + + options->lcd_filter = lcd_filter; +} + +/** + * _cairo_font_options_get_lcd_filter: + * @options: a #cairo_font_options_t + * + * Gets the LCD filter for the font options object. + * See the documentation for #cairo_lcd_filter_t for full details. + * + * Return value: the LCD filter for the font options object + * + * Since: 1.8 + **/ +cairo_lcd_filter_t +_cairo_font_options_get_lcd_filter (const cairo_font_options_t *options) +{ + if (cairo_font_options_status ((cairo_font_options_t *) options)) + return CAIRO_LCD_FILTER_DEFAULT; + + return options->lcd_filter; +} + +/** * cairo_font_options_set_hint_style: * @options: a #cairo_font_options_t * @hint_style: the new hint style * * Sets the hint style for font outlines for the font options object. * This controls whether to fit font outlines to the pixel grid, * and if so, whether to optimize for fidelity or contrast. * See the documentation for #cairo_hint_style_t for full details. diff --git a/gfx/cairo/cairo/src/cairo-ft-font.c b/gfx/cairo/cairo/src/cairo-ft-font.c --- a/gfx/cairo/cairo/src/cairo-ft-font.c +++ b/gfx/cairo/cairo/src/cairo-ft-font.c @@ -54,16 +54,38 @@ #include FT_FREETYPE_H #include FT_OUTLINE_H #include FT_IMAGE_H #include FT_TRUETYPE_TABLES_H #if HAVE_FT_GLYPHSLOT_EMBOLDEN #include FT_SYNTHESIS_H #endif +#include FT_LCD_FILTER_H + +/* Fontconfig version older than 2.6 didn't have these options */ +#ifndef FC_LCD_FILTER +#define FC_LCD_FILTER "lcdfilter" +#endif +/* Some Ubuntu versions defined FC_LCD_FILTER without defining the following */ +#ifndef FC_LCD_NONE +#define FC_LCD_NONE 0 +#define FC_LCD_DEFAULT 1 +#define FC_LCD_LIGHT 2 +#define FC_LCD_LEGACY 3 +#endif + +/* FreeType version older than 2.3.5(?) didn't have these options */ +#ifndef FT_LCD_FILTER_NONE +#define FT_LCD_FILTER_NONE 0 +#define FT_LCD_FILTER_DEFAULT 1 +#define FT_LCD_FILTER_LIGHT 2 +#define FT_LCD_FILTER_LEGACY 16 +#endif + #define DOUBLE_TO_26_6(d) ((FT_F26Dot6)((d) * 64.0)) #define DOUBLE_FROM_26_6(t) ((double)(t) / 64.0) #define DOUBLE_TO_16_16(d) ((FT_Fixed)((d) * 65536.0)) #define DOUBLE_FROM_16_16(t) ((double)(t) / 65536.0) /* This is the max number of FT_face objects we keep open at once */ #define MAX_OPEN_FACES 10 @@ -746,46 +768,309 @@ _cairo_ft_unscaled_font_set_scale (cairo unscaled->face->available_sizes[best_i].height); if (error) return _cairo_error (CAIRO_STATUS_NO_MEMORY); } return CAIRO_STATUS_SUCCESS; } -/* Empirically-derived subpixel filtering values thanks to Keith - * Packard and libXft. */ -static const int filters[3][3] = { - /* red */ -#if 0 - { 65538*4/7,65538*2/7,65538*1/7 }, - /* green */ - { 65536*1/4, 65536*2/4, 65537*1/4 }, - /* blue */ - { 65538*1/7,65538*2/7,65538*4/7 }, +/* we sometimes need to convert the glyph bitmap in a FT_GlyphSlot + * into a different format. For example, we want to convert a + * FT_PIXEL_MODE_LCD or FT_PIXEL_MODE_LCD_V bitmap into a 32-bit + * ARGB or ABGR bitmap. + * + * this function prepares a target descriptor for this operation. + * + * input :: target bitmap descriptor. The function will set its + * 'width', 'rows' and 'pitch' fields, and only these + * + * slot :: the glyph slot containing the source bitmap. this + * function assumes that slot->format == FT_GLYPH_FORMAT_BITMAP + * + * mode :: the requested final rendering mode. supported values are + * MONO, NORMAL (i.e. gray), LCD and LCD_V + * + * the function returns the size in bytes of the corresponding buffer, + * it's up to the caller to allocate the corresponding memory block + * before calling _fill_xrender_bitmap + * + * it also returns -1 in case of error (e.g. incompatible arguments, + * like trying to convert a gray bitmap into a monochrome one) + */ +static int +_compute_xrender_bitmap_size(FT_Bitmap *target, + FT_GlyphSlot slot, + FT_Render_Mode mode) +{ + FT_Bitmap *ftbit; + int width, height, pitch; + + if (slot->format != FT_GLYPH_FORMAT_BITMAP) + return -1; + + /* compute the size of the final bitmap */ + ftbit = &slot->bitmap; + + width = ftbit->width; + height = ftbit->rows; + pitch = (width + 3) & ~3; + + switch (ftbit->pixel_mode) { + case FT_PIXEL_MODE_MONO: + if (mode == FT_RENDER_MODE_MONO) { + pitch = (((width + 31) & ~31) >> 3); + break; + } + /* fall-through */ + + case FT_PIXEL_MODE_GRAY: + if (mode == FT_RENDER_MODE_LCD || + mode == FT_RENDER_MODE_LCD_V) + { + /* each pixel is replicated into a 32-bit ARGB value */ + pitch = width * 4; + } + break; + + case FT_PIXEL_MODE_LCD: + if (mode != FT_RENDER_MODE_LCD) + return -1; + + /* horz pixel triplets are packed into 32-bit ARGB values */ + width /= 3; + pitch = width * 4; + break; + + case FT_PIXEL_MODE_LCD_V: + if (mode != FT_RENDER_MODE_LCD_V) + return -1; + + /* vert pixel triplets are packed into 32-bit ARGB values */ + height /= 3; + pitch = width * 4; + break; + + default: /* unsupported source format */ + return -1; + } + + target->width = width; + target->rows = height; + target->pitch = pitch; + target->buffer = NULL; + + return pitch * height; +} + +/* this functions converts the glyph bitmap found in a FT_GlyphSlot + * into a different format (see _compute_xrender_bitmap_size) + * + * you should call this function after _compute_xrender_bitmap_size + * + * target :: target bitmap descriptor. Note that its 'buffer' pointer + * must point to memory allocated by the caller + * + * slot :: the glyph slot containing the source bitmap + * + * mode :: the requested final rendering mode + * + * bgr :: boolean, set if BGR or VBGR pixel ordering is needed + */ +static void +_fill_xrender_bitmap(FT_Bitmap *target, + FT_GlyphSlot slot, + FT_Render_Mode mode, + int bgr) +{ + FT_Bitmap *ftbit = &slot->bitmap; + unsigned char *srcLine = ftbit->buffer; + unsigned char *dstLine = target->buffer; + int src_pitch = ftbit->pitch; + int width = target->width; + int height = target->rows; + int pitch = target->pitch; + int subpixel; + int h; + + subpixel = (mode == FT_RENDER_MODE_LCD || + mode == FT_RENDER_MODE_LCD_V); + + if (src_pitch < 0) + srcLine -= src_pitch * (ftbit->rows - 1); + + target->pixel_mode = ftbit->pixel_mode; + + switch (ftbit->pixel_mode) { + case FT_PIXEL_MODE_MONO: + if (subpixel) { + /* convert mono to ARGB32 values */ + + for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) { + int x; + + for (x = 0; x < width; x++) { + if (srcLine[(x >> 3)] & (0x80 >> (x & 7))) + ((unsigned int *) dstLine)[x] = 0xffffffffU; + } + } + target->pixel_mode = FT_PIXEL_MODE_LCD; + + } else if (mode == FT_RENDER_MODE_NORMAL) { + /* convert mono to 8-bit gray */ + + for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) { + int x; + + for (x = 0; x < width; x++) { + if (srcLine[(x >> 3)] & (0x80 >> (x & 7))) + dstLine[x] = 0xff; + } + } + target->pixel_mode = FT_PIXEL_MODE_GRAY; + + } else { + /* copy mono to mono */ + + int bytes = (width + 7) >> 3; + + for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) + memcpy (dstLine, srcLine, bytes); + } + break; + + case FT_PIXEL_MODE_GRAY: + if (subpixel) { + /* convert gray to ARGB32 values */ + + for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) { + int x; + unsigned int *dst = (unsigned int *) dstLine; + + for (x = 0; x < width; x++) { + unsigned int pix = srcLine[x]; + + pix |= (pix << 8); + pix |= (pix << 16); + + dst[x] = pix; + } + } + target->pixel_mode = FT_PIXEL_MODE_LCD; + } else { + /* copy gray into gray */ + + for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) + memcpy (dstLine, srcLine, width); + } + break; + + case FT_PIXEL_MODE_LCD: + if (!bgr) { + /* convert horizontal RGB into ARGB32 */ + + for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) { + int x; + unsigned char *src = srcLine; + unsigned int *dst = (unsigned int *) dstLine; + + for (x = 0; x < width; x++, src += 3) { + unsigned int pix; + + pix = ((unsigned int)src[0] << 16) | + ((unsigned int)src[1] << 8) | + ((unsigned int)src[2] ) | + ((unsigned int)src[1] << 24) ; + + dst[x] = pix; + } + } + } else { + /* convert horizontal BGR into ARGB32 */ + + for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) { + + int x; + unsigned char *src = srcLine; + unsigned int *dst = (unsigned int *) dstLine; + + for (x = 0; x < width; x++, src += 3) { + unsigned int pix; + + pix = ((unsigned int)src[2] << 16) | + ((unsigned int)src[1] << 8) | + ((unsigned int)src[0] ) | + ((unsigned int)src[1] << 24) ; + + dst[x] = pix; + } + } + } + break; + + default: /* FT_PIXEL_MODE_LCD_V */ + /* convert vertical RGB into ARGB32 */ + if (!bgr) { + + for (h = height; h > 0; h--, srcLine += 3 * src_pitch, dstLine += pitch) { + int x; + unsigned char* src = srcLine; + unsigned int* dst = (unsigned int *) dstLine; + + for (x = 0; x < width; x++, src += 1) { + unsigned int pix; +#if 1 + pix = ((unsigned int)src[0] << 16) | + ((unsigned int)src[src_pitch] << 8) | + ((unsigned int)src[src_pitch*2] ) | + 0xFF000000 ; +#else + pix = ((unsigned int)src[0] << 16) | + ((unsigned int)src[src_pitch] << 8) | + ((unsigned int)src[src_pitch*2] ) | + ((unsigned int)src[src_pitch] << 24) ; #endif - { 65538*9/13,65538*3/13,65538*1/13 }, - /* green */ - { 65538*1/6, 65538*4/6, 65538*1/6 }, - /* blue */ - { 65538*1/13,65538*3/13,65538*9/13 }, -}; + dst[x] = pix; + } + } + } else { + + for (h = height; h > 0; h--, srcLine += 3*src_pitch, dstLine += pitch) { + int x; + unsigned char *src = srcLine; + unsigned int *dst = (unsigned int *) dstLine; + + for (x = 0; x < width; x++, src += 1) { + unsigned int pix; + + pix = ((unsigned int)src[src_pitch * 2] << 16) | + ((unsigned int)src[src_pitch] << 8) | + ((unsigned int)src[0] ) | + ((unsigned int)src[src_pitch] << 24) ; + + dst[x] = pix; + } + } + } + } +} + /* Fills in val->image with an image surface created from @bitmap */ static cairo_status_t _get_bitmap_surface (FT_Bitmap *bitmap, cairo_bool_t own_buffer, cairo_font_options_t *font_options, cairo_image_surface_t **surface) { int width, height, stride; unsigned char *data; int format = CAIRO_FORMAT_A8; - cairo_bool_t subpixel = FALSE; + cairo_image_surface_t *image; width = bitmap->width; height = bitmap->rows; if (width == 0 || height == 0) { *surface = (cairo_image_surface_t *) cairo_image_surface_create_for_data (NULL, format, 0, 0, 0); return (*surface)->base.status; @@ -832,154 +1117,63 @@ _get_bitmap_surface (FT_Bitmap *bi } #endif format = CAIRO_FORMAT_A1; break; case FT_PIXEL_MODE_LCD: case FT_PIXEL_MODE_LCD_V: case FT_PIXEL_MODE_GRAY: - switch (font_options->antialias) { - case CAIRO_ANTIALIAS_DEFAULT: - case CAIRO_ANTIALIAS_GRAY: - case CAIRO_ANTIALIAS_NONE: - default: + if (font_options->antialias != CAIRO_ANTIALIAS_SUBPIXEL) { stride = bitmap->pitch; if (own_buffer) { data = bitmap->buffer; } else { data = _cairo_malloc_ab (height, stride); if (!data) return _cairo_error (CAIRO_STATUS_NO_MEMORY); memcpy (data, bitmap->buffer, stride * height); } format = CAIRO_FORMAT_A8; - break; - case CAIRO_ANTIALIAS_SUBPIXEL: { - int x, y; - unsigned char *in_line, *out_line, *in; - unsigned int *out; - unsigned int red, green, blue; - int rf, gf, bf; - int s; - int o, os; - unsigned char *data_rgba; - unsigned int width_rgba, stride_rgba; - int vmul = 1; - int hmul = 1; - - switch (font_options->subpixel_order) { - case CAIRO_SUBPIXEL_ORDER_DEFAULT: - case CAIRO_SUBPIXEL_ORDER_RGB: - case CAIRO_SUBPIXEL_ORDER_BGR: - default: - width /= 3; - hmul = 3; - break; - case CAIRO_SUBPIXEL_ORDER_VRGB: - case CAIRO_SUBPIXEL_ORDER_VBGR: - vmul = 3; - height /= 3; - break; - } - /* - * Filter the glyph to soften the color fringes - */ - width_rgba = width; + } else { + /* if we get there, the data from the source bitmap + * really comes from _fill_xrender_bitmap, and is + * made of 32-bit ARGB or ABGR values */ + assert (own_buffer != 0); + assert (bitmap->pixel_mode != FT_PIXEL_MODE_GRAY); + + data = bitmap->buffer; stride = bitmap->pitch; - stride_rgba = (width_rgba * 4 + 3) & ~3; - data_rgba = calloc (stride_rgba, height); - if (data_rgba == NULL) { - if (own_buffer) - free (bitmap->buffer); - return _cairo_error (CAIRO_STATUS_NO_MEMORY); - } - - os = 1; - switch (font_options->subpixel_order) { - case CAIRO_SUBPIXEL_ORDER_VRGB: - os = stride; - case CAIRO_SUBPIXEL_ORDER_DEFAULT: - case CAIRO_SUBPIXEL_ORDER_RGB: - default: - rf = 0; - gf = 1; - bf = 2; - break; - case CAIRO_SUBPIXEL_ORDER_VBGR: - os = stride; - case CAIRO_SUBPIXEL_ORDER_BGR: - bf = 0; - gf = 1; - rf = 2; - break; - } - in_line = bitmap->buffer; - out_line = data_rgba; - for (y = 0; y < height; y++) - { - in = in_line; - out = (unsigned int *) out_line; - in_line += stride * vmul; - out_line += stride_rgba; - for (x = 0; x < width * hmul; x += hmul) - { - red = green = blue = 0; - o = 0; - for (s = 0; s < 3; s++) - { - red += filters[rf][s]*in[x+o]; - green += filters[gf][s]*in[x+o]; - blue += filters[bf][s]*in[x+o]; - o += os; - } - red = red / 65536; - green = green / 65536; - blue = blue / 65536; - *out++ = (green << 24) | (red << 16) | (green << 8) | blue; - } - } - - /* Images here are stored in native format. The - * backend must convert to its own format as needed - */ - - if (own_buffer) - free (bitmap->buffer); - data = data_rgba; - stride = stride_rgba; format = CAIRO_FORMAT_ARGB32; - subpixel = TRUE; - break; - } } break; case FT_PIXEL_MODE_GRAY2: case FT_PIXEL_MODE_GRAY4: /* These could be triggered by very rare types of TrueType fonts */ default: if (own_buffer) free (bitmap->buffer); return _cairo_error (CAIRO_STATUS_NO_MEMORY); } - *surface = (cairo_image_surface_t *) + /* XXX */ + *surface = image = (cairo_image_surface_t *) cairo_image_surface_create_for_data (data, format, width, height, stride); - if ((*surface)->base.status) { + if (image->base.status) { free (data); return (*surface)->base.status; } - if (subpixel) - pixman_image_set_component_alpha ((*surface)->pixman_image, TRUE); - - _cairo_image_surface_assume_ownership_of_data ((*surface)); + if (font_options->antialias == CAIRO_ANTIALIAS_SUBPIXEL) + pixman_image_set_component_alpha (image->pixman_image, TRUE); + + _cairo_image_surface_assume_ownership_of_data (image); return CAIRO_STATUS_SUCCESS; } /* Converts an outline FT_GlyphSlot into an image * * This could go through _render_glyph_bitmap as well, letting * FreeType convert the outline to a bitmap, but doing it ourselves @@ -994,129 +1188,171 @@ _get_bitmap_surface (FT_Bitmap *bi * when we add subpixel support. If so, we may want to eliminate * this version of the code path entirely. */ static cairo_status_t _render_glyph_outline (FT_Face face, cairo_font_options_t *font_options, cairo_image_surface_t **surface) { + int rgba = FC_RGBA_UNKNOWN; + int lcd_filter = FT_LCD_FILTER_LEGACY; FT_GlyphSlot glyphslot = face->glyph; FT_Outline *outline = &glyphslot->outline; FT_Bitmap bitmap; FT_BBox cbox; - FT_Matrix matrix; - int hmul = 1; - int vmul = 1; - unsigned int width, height, stride; - cairo_bool_t subpixel = FALSE; + unsigned int width, height; cairo_status_t status; + FT_Error fterror; + FT_Library library = glyphslot->library; + FT_Render_Mode render_mode = FT_RENDER_MODE_NORMAL; + + switch (font_options->antialias) { + case CAIRO_ANTIALIAS_NONE: + render_mode = FT_RENDER_MODE_MONO; + break; + + case CAIRO_ANTIALIAS_SUBPIXEL: + switch (font_options->subpixel_order) { + case CAIRO_SUBPIXEL_ORDER_DEFAULT: + case CAIRO_SUBPIXEL_ORDER_RGB: + case CAIRO_SUBPIXEL_ORDER_BGR: + render_mode = FT_RENDER_MODE_LCD; + break; + + case CAIRO_SUBPIXEL_ORDER_VRGB: + case CAIRO_SUBPIXEL_ORDER_VBGR: + render_mode = FT_RENDER_MODE_LCD_V; + break; + } + + switch (font_options->lcd_filter) { + case CAIRO_LCD_FILTER_NONE: + lcd_filter = FT_LCD_FILTER_NONE; + break; + case CAIRO_LCD_FILTER_DEFAULT: + case CAIRO_LCD_FILTER_INTRA_PIXEL: + lcd_filter = FT_LCD_FILTER_LEGACY; + break; + case CAIRO_LCD_FILTER_FIR3: + lcd_filter = FT_LCD_FILTER_LIGHT; + break; + case CAIRO_LCD_FILTER_FIR5: + lcd_filter = FT_LCD_FILTER_DEFAULT; + break; + } + + break; + + case CAIRO_ANTIALIAS_DEFAULT: + case CAIRO_ANTIALIAS_GRAY: + render_mode = FT_RENDER_MODE_NORMAL; + } FT_Outline_Get_CBox (outline, &cbox); cbox.xMin &= -64; cbox.yMin &= -64; cbox.xMax = (cbox.xMax + 63) & -64; cbox.yMax = (cbox.yMax + 63) & -64; width = (unsigned int) ((cbox.xMax - cbox.xMin) >> 6); height = (unsigned int) ((cbox.yMax - cbox.yMin) >> 6); - stride = (width * hmul + 3) & ~3; if (width * height == 0) { cairo_format_t format; /* Looks like fb handles zero-sized images just fine */ - switch (font_options->antialias) { - case CAIRO_ANTIALIAS_NONE: + switch (render_mode) { + case FT_RENDER_MODE_MONO: format = CAIRO_FORMAT_A1; break; - case CAIRO_ANTIALIAS_SUBPIXEL: + case FT_RENDER_MODE_LCD: + case FT_RENDER_MODE_LCD_V: format= CAIRO_FORMAT_ARGB32; break; - case CAIRO_ANTIALIAS_DEFAULT: - case CAIRO_ANTIALIAS_GRAY: + case FT_RENDER_MODE_LIGHT: + case FT_RENDER_MODE_NORMAL: + case FT_RENDER_MODE_MAX: default: format = CAIRO_FORMAT_A8; break; } (*surface) = (cairo_image_surface_t *) cairo_image_surface_create_for_data (NULL, format, 0, 0, 0); if ((*surface)->base.status) return (*surface)->base.status; } else { - matrix.xx = matrix.yy = 0x10000L; - matrix.xy = matrix.yx = 0; - - switch (font_options->antialias) { - case CAIRO_ANTIALIAS_NONE: - bitmap.pixel_mode = FT_PIXEL_MODE_MONO; - bitmap.num_grays = 1; - stride = ((width + 31) & -32) >> 3; + int bitmap_size; + + switch (render_mode) { + case FT_RENDER_MODE_LCD: + if (font_options->subpixel_order == CAIRO_SUBPIXEL_ORDER_BGR) { + rgba = FC_RGBA_BGR; + } else { + rgba = FC_RGBA_RGB; + } break; - case CAIRO_ANTIALIAS_DEFAULT: - case CAIRO_ANTIALIAS_GRAY: - bitmap.pixel_mode = FT_PIXEL_MODE_GRAY; - bitmap.num_grays = 256; - stride = (width + 3) & -4; + case FT_RENDER_MODE_LCD_V: + if (font_options->subpixel_order == CAIRO_SUBPIXEL_ORDER_VBGR) { + rgba = FC_RGBA_VBGR; + } else { + rgba = FC_RGBA_VRGB; + } break; - case CAIRO_ANTIALIAS_SUBPIXEL: - switch (font_options->subpixel_order) { - case CAIRO_SUBPIXEL_ORDER_RGB: - case CAIRO_SUBPIXEL_ORDER_BGR: - case CAIRO_SUBPIXEL_ORDER_DEFAULT: - default: - matrix.xx *= 3; - hmul = 3; - subpixel = TRUE; - break; - case CAIRO_SUBPIXEL_ORDER_VRGB: - case CAIRO_SUBPIXEL_ORDER_VBGR: - matrix.yy *= 3; - vmul = 3; - subpixel = TRUE; - break; - } - FT_Outline_Transform (outline, &matrix); - - bitmap.pixel_mode = FT_PIXEL_MODE_GRAY; - bitmap.num_grays = 256; - stride = (width * hmul + 3) & -4; + case FT_RENDER_MODE_MONO: + case FT_RENDER_MODE_LIGHT: + case FT_RENDER_MODE_NORMAL: + case FT_RENDER_MODE_MAX: + default: + break; } - bitmap.pitch = stride; - bitmap.width = width * hmul; - bitmap.rows = height * vmul; - bitmap.buffer = calloc (stride, bitmap.rows); + FT_Library_SetLcdFilter (library, lcd_filter); + + fterror = FT_Render_Glyph (face->glyph, render_mode); + + FT_Library_SetLcdFilter (library, FT_LCD_FILTER_NONE); + + if (fterror != 0) + return _cairo_error (CAIRO_STATUS_NO_MEMORY); + + bitmap_size = _compute_xrender_bitmap_size (&bitmap, + face->glyph, + render_mode); + if (bitmap_size < 0) + return _cairo_error (CAIRO_STATUS_NO_MEMORY); + + bitmap.buffer = calloc (1, bitmap_size); if (bitmap.buffer == NULL) return _cairo_error (CAIRO_STATUS_NO_MEMORY); - FT_Outline_Translate (outline, -cbox.xMin*hmul, -cbox.yMin*vmul); - - if (FT_Outline_Get_Bitmap (glyphslot->library, outline, &bitmap) != 0) { - free (bitmap.buffer); - return _cairo_error (CAIRO_STATUS_NO_MEMORY); - } - + _fill_xrender_bitmap (&bitmap, face->glyph, render_mode, + (rgba == FC_RGBA_BGR || rgba == FC_RGBA_VBGR)); + + /* Note: + * _get_bitmap_surface will free bitmap.buffer if there is an error + */ status = _get_bitmap_surface (&bitmap, TRUE, font_options, surface); if (status) return status; + + /* Note: the font's coordinate system is upside down from ours, so the + * Y coordinate of the control box needs to be negated. Moreover, + * device + * offsets are position of glyph origin relative to top left while + * xMin + * and yMax are offsets of top left relative to origin. Another + * negation. + */ + cairo_surface_set_device_offset (&(*surface)->base, + (double)-glyphslot->bitmap_left, + (double)+glyphslot->bitmap_top); } - - /* - * Note: the font's coordinate system is upside down from ours, so the - * Y coordinate of the control box needs to be negated. Moreover, device - * offsets are position of glyph origin relative to top left while xMin - * and yMax are offsets of top left relative to origin. Another negation. - */ - cairo_surface_set_device_offset (&(*surface)->base, - floor (-(double) cbox.xMin / 64.0), - floor (+(double) cbox.yMax / 64.0)); - return CAIRO_STATUS_SUCCESS; } /* Converts a bitmap (or other) FT_GlyphSlot into an image */ static cairo_status_t _render_glyph_bitmap (FT_Face face, cairo_font_options_t *font_options, cairo_image_surface_t **surface) @@ -1326,16 +1562,17 @@ _get_pattern_ft_options (FcPattern *patt /* disable antialiasing if requested */ if (FcPatternGetBool (pattern, FC_ANTIALIAS, 0, &antialias) != FcResultMatch) antialias = FcTrue; if (antialias) { cairo_subpixel_order_t subpixel_order; + int lcd_filter; /* disable hinting if requested */ if (FcPatternGetBool (pattern, FC_HINTING, 0, &hinting) != FcResultMatch) hinting = FcTrue; if (FcPatternGetInteger (pattern, FC_RGBA, 0, &rgba) != FcResultMatch) @@ -1361,16 +1598,35 @@ _get_pattern_ft_options (FcPattern *patt break; } if (subpixel_order != CAIRO_SUBPIXEL_ORDER_DEFAULT) { ft_options.base.subpixel_order = subpixel_order; ft_options.base.antialias = CAIRO_ANTIALIAS_SUBPIXEL; } + if (FcPatternGetInteger (pattern, + FC_LCD_FILTER, 0, &lcd_filter) == FcResultMatch) + { + switch (lcd_filter) { + case FC_LCD_NONE: + ft_options.base.lcd_filter = CAIRO_LCD_FILTER_NONE; + break; + case FC_LCD_DEFAULT: + ft_options.base.lcd_filter = CAIRO_LCD_FILTER_FIR5; + break; + case FC_LCD_LIGHT: + ft_options.base.lcd_filter = CAIRO_LCD_FILTER_FIR3; + break; + case FC_LCD_LEGACY: + ft_options.base.lcd_filter = CAIRO_LCD_FILTER_INTRA_PIXEL; + break; + } + } + #ifdef FC_HINT_STYLE if (FcPatternGetInteger (pattern, FC_HINT_STYLE, 0, &hintstyle) != FcResultMatch) hintstyle = FC_HINT_FULL; if (!hinting) hintstyle = FC_HINT_NONE; @@ -1462,16 +1718,22 @@ _cairo_ft_options_merge (cairo_ft_option } if (options->base.hint_style == CAIRO_HINT_STYLE_DEFAULT) options->base.hint_style = other->base.hint_style; if (other->base.hint_style == CAIRO_HINT_STYLE_NONE) options->base.hint_style = CAIRO_HINT_STYLE_NONE; + if (options->base.lcd_filter == CAIRO_LCD_FILTER_DEFAULT) + options->base.lcd_filter = other->base.lcd_filter; + + if (other->base.lcd_filter == CAIRO_LCD_FILTER_NONE) + options->base.lcd_filter = CAIRO_LCD_FILTER_NONE; + if (options->base.antialias == CAIRO_ANTIALIAS_NONE) { if (options->base.hint_style == CAIRO_HINT_STYLE_NONE) load_flags |= FT_LOAD_NO_HINTING; else load_target = FT_LOAD_TARGET_MONO; load_flags |= FT_LOAD_MONOCHROME; } else { switch (options->base.hint_style) { @@ -1485,21 +1747,21 @@ _cairo_ft_options_merge (cairo_ft_option break; case CAIRO_HINT_STYLE_FULL: case CAIRO_HINT_STYLE_DEFAULT: if (options->base.antialias == CAIRO_ANTIALIAS_SUBPIXEL) { switch (options->base.subpixel_order) { case CAIRO_SUBPIXEL_ORDER_DEFAULT: case CAIRO_SUBPIXEL_ORDER_RGB: case CAIRO_SUBPIXEL_ORDER_BGR: - load_target |= FT_LOAD_TARGET_LCD; + load_target = FT_LOAD_TARGET_LCD; break; case CAIRO_SUBPIXEL_ORDER_VRGB: case CAIRO_SUBPIXEL_ORDER_VBGR: - load_target |= FT_LOAD_TARGET_LCD_V; + load_target = FT_LOAD_TARGET_LCD_V; break; } } break; } } options->load_flags = load_flags | load_target; @@ -2460,16 +2722,44 @@ _cairo_ft_font_options_substitute (const rgba = FC_RGBA_NONE; } if (! FcPatternAddInteger (pattern, FC_RGBA, rgba)) return _cairo_error (CAIRO_STATUS_NO_MEMORY); } } + if (options->lcd_filter != CAIRO_LCD_FILTER_DEFAULT) + { + if (FcPatternGet (pattern, FC_LCD_FILTER, 0, &v) == FcResultNoMatch) + { + int lcd_filter; + + switch (options->lcd_filter) { + case CAIRO_LCD_FILTER_NONE: + lcd_filter = FT_LCD_FILTER_NONE; + break; + case CAIRO_LCD_FILTER_DEFAULT: + case CAIRO_LCD_FILTER_INTRA_PIXEL: + lcd_filter = FT_LCD_FILTER_LEGACY; + break; + case CAIRO_LCD_FILTER_FIR3: + lcd_filter = FT_LCD_FILTER_LIGHT; + break; + default: + case CAIRO_LCD_FILTER_FIR5: + lcd_filter = FT_LCD_FILTER_DEFAULT; + break; + } + + if (! FcPatternAddInteger (pattern, FC_LCD_FILTER, lcd_filter)) + return _cairo_error (CAIRO_STATUS_NO_MEMORY); + } + } + if (options->hint_style != CAIRO_HINT_STYLE_DEFAULT) { if (FcPatternGet (pattern, FC_HINTING, 0, &v) == FcResultNoMatch) { if (! FcPatternAddBool (pattern, FC_HINTING, options->hint_style != CAIRO_HINT_STYLE_NONE)) return _cairo_error (CAIRO_STATUS_NO_MEMORY); diff --git a/gfx/cairo/cairo/src/cairo-surface.c b/gfx/cairo/cairo/src/cairo-surface.c --- a/gfx/cairo/cairo/src/cairo-surface.c +++ b/gfx/cairo/cairo/src/cairo-surface.c @@ -68,16 +68,17 @@ const cairo_surface_t name = { \ 0.0, /* y_fallback_resolution */ \ NULL, /* clip */ \ 0, /* next_clip_serial */ \ 0, /* current_clip_serial */ \ FALSE, /* is_snapshot */ \ FALSE, /* has_font_options */ \ { CAIRO_ANTIALIAS_DEFAULT, /* antialias */ \ CAIRO_SUBPIXEL_ORDER_DEFAULT, /* subpixel_order */ \ + CAIRO_LCD_FILTER_DEFAULT, /* lcd_filter */ \ CAIRO_HINT_STYLE_DEFAULT, /* hint_style */ \ CAIRO_HINT_METRICS_DEFAULT /* hint_metrics */ \ } /* font_options */ \ } static DEFINE_NIL_SURFACE(CAIRO_STATUS_NO_MEMORY, _cairo_surface_nil); static DEFINE_NIL_SURFACE(CAIRO_STATUS_INVALID_CONTENT, _cairo_surface_nil_invalid_content); static DEFINE_NIL_SURFACE(CAIRO_STATUS_INVALID_FORMAT, _cairo_surface_nil_invalid_format); diff --git a/gfx/cairo/cairo/src/cairo-types-private.h b/gfx/cairo/cairo/src/cairo-types-private.h --- a/gfx/cairo/cairo/src/cairo-types-private.h +++ b/gfx/cairo/cairo/src/cairo-types-private.h @@ -108,19 +108,44 @@ struct _cairo_array { unsigned int size; unsigned int num_elements; unsigned int element_size; char **elements; cairo_bool_t is_snapshot; }; +/** + * cairo_lcd_filter_t: + * @CAIRO_LCD_FILTER_DEFAULT: Use the default LCD filter for + * font backend and target device + * @CAIRO_LCD_FILTER_NONE: Do not perform LCD filtering + * @CAIRO_LCD_FILTER_INTRA_PIXEL: Intra-pixel filter + * @CAIRO_LCD_FILTER_FIR3: FIR filter with a 3x3 kernel + * @CAIRO_LCD_FILTER_FIR5: FIR filter with a 5x5 kernel + * + * The LCD filter specifies the low-pass filter applied to LCD-optimized + * bitmaps generated with an antialiasing mode of %CAIRO_ANTIALIAS_SUBPIXEL. + * + * Note: This API was temporarily made available in the public + * interface during the 1.7.x development series, but was made private + * before 1.8. + **/ +typedef enum _cairo_lcd_filter { + CAIRO_LCD_FILTER_DEFAULT, + CAIRO_LCD_FILTER_NONE, + CAIRO_LCD_FILTER_INTRA_PIXEL, + CAIRO_LCD_FILTER_FIR3, + CAIRO_LCD_FILTER_FIR5 +} cairo_lcd_filter_t; + struct _cairo_font_options { cairo_antialias_t antialias; cairo_subpixel_order_t subpixel_order; + cairo_lcd_filter_t lcd_filter; cairo_hint_style_t hint_style; cairo_hint_metrics_t hint_metrics; }; struct _cairo_cache { cairo_hash_table_t *hash_table; cairo_destroy_func_t entry_destroy; diff --git a/gfx/cairo/cairo/src/cairo-xlib-screen.c b/gfx/cairo/cairo/src/cairo-xlib-screen.c --- a/gfx/cairo/cairo/src/cairo-xlib-screen.c +++ b/gfx/cairo/cairo/src/cairo-xlib-screen.c @@ -145,23 +145,32 @@ get_integer_default (Display *dpy, static void _cairo_xlib_init_screen_font_options (Display *dpy, cairo_xlib_screen_info_t *info) { cairo_bool_t xft_hinting; cairo_bool_t xft_antialias; int xft_hintstyle; int xft_rgba; + int xft_lcdfilter; cairo_antialias_t antialias; cairo_subpixel_order_t subpixel_order; + cairo_lcd_filter_t lcd_filter; cairo_hint_style_t hint_style; if (!get_boolean_default (dpy, "antialias", &xft_antialias)) xft_antialias = TRUE; + if (!get_integer_default (dpy, "lcdfilter", &xft_lcdfilter)) { + /* -1 is an non-existant Fontconfig constant used to differentiate + * the case when no lcdfilter property is available. + */ + xft_lcdfilter = -1; + } + if (!get_boolean_default (dpy, "hinting", &xft_hinting)) xft_hinting = TRUE; if (!get_integer_default (dpy, "hintstyle", &xft_hintstyle)) xft_hintstyle = FC_HINT_FULL; if (!get_integer_default (dpy, "rgba", &xft_rgba)) { @@ -234,28 +243,47 @@ _cairo_xlib_init_screen_font_options (Di subpixel_order = CAIRO_SUBPIXEL_ORDER_VBGR; break; case FC_RGBA_UNKNOWN: case FC_RGBA_NONE: default: subpixel_order = CAIRO_SUBPIXEL_ORDER_DEFAULT; } + switch (xft_lcdfilter) { + case FC_LCD_NONE: + lcd_filter = CAIRO_LCD_FILTER_NONE; + break; + case FC_LCD_DEFAULT: + lcd_filter = CAIRO_LCD_FILTER_FIR5; + break; + case FC_LCD_LIGHT: + lcd_filter = CAIRO_LCD_FILTER_FIR3; + break; + case FC_LCD_LEGACY: + lcd_filter = CAIRO_LCD_FILTER_INTRA_PIXEL; + break; + default: + lcd_filter = CAIRO_LCD_FILTER_DEFAULT; + break; + } + if (xft_antialias) { if (subpixel_order == CAIRO_SUBPIXEL_ORDER_DEFAULT) antialias = CAIRO_ANTIALIAS_GRAY; else antialias = CAIRO_ANTIALIAS_SUBPIXEL; } else { antialias = CAIRO_ANTIALIAS_NONE; } cairo_font_options_set_hint_style (&info->font_options, hint_style); cairo_font_options_set_antialias (&info->font_options, antialias); cairo_font_options_set_subpixel_order (&info->font_options, subpixel_order); + _cairo_font_options_set_lcd_filter (&info->font_options, lcd_filter); cairo_font_options_set_hint_metrics (&info->font_options, CAIRO_HINT_METRICS_ON); } cairo_xlib_screen_info_t * _cairo_xlib_screen_info_reference (cairo_xlib_screen_info_t *info) { assert (CAIRO_REFERENCE_COUNT_HAS_REFERENCE (&info->ref_count)); diff --git a/gfx/cairo/cairo/src/cairoint.h b/gfx/cairo/cairo/src/cairoint.h --- a/gfx/cairo/cairo/src/cairoint.h +++ b/gfx/cairo/cairo/src/cairoint.h @@ -1367,16 +1367,23 @@ extern const cairo_private uint16_t _cai cairo_private void _cairo_font_options_init_default (cairo_font_options_t *options); cairo_private void _cairo_font_options_init_copy (cairo_font_options_t *options, const cairo_font_options_t *other); +cairo_private void +_cairo_font_options_set_lcd_filter (cairo_font_options_t *options, + cairo_lcd_filter_t lcd_filter); + +cairo_private cairo_lcd_filter_t +_cairo_font_options_get_lcd_filter (const cairo_font_options_t *options); + /* cairo-hull.c */ cairo_private cairo_status_t _cairo_hull_compute (cairo_pen_vertex_t *vertices, int *num_vertices); /* cairo-lzw.c */ cairo_private unsigned char * _cairo_lzw_compress (unsigned char *data, unsigned long *size_in_out);
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