diff options
Diffstat (limited to 'librsvg/rsvg-paint-server.c')
| -rw-r--r-- | librsvg/rsvg-paint-server.c | 345 |
1 files changed, 0 insertions, 345 deletions
diff --git a/librsvg/rsvg-paint-server.c b/librsvg/rsvg-paint-server.c deleted file mode 100644 index 53e34e022..000000000 --- a/librsvg/rsvg-paint-server.c +++ /dev/null @@ -1,345 +0,0 @@ -/* - rsvg-paint-server.c: Implement the SVG paint server abstraction. - - Copyright (C) 2000 Eazel, Inc. - - This program is free software; you can redistribute it and/or - modify it under the terms of the GNU General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. - - You should have received a copy of the GNU General Public - License along with this program; if not, write to the - Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. - - Author: Raph Levien <raph@artofcode.com> -*/ - -#include <string.h> -#include <ctype.h> - -#include <glib.h> - -#include <libart_lgpl/art_misc.h> -#include <libart_lgpl/art_alphagamma.h> -#include <libart_lgpl/art_filterlevel.h> -#include <libart_lgpl/art_affine.h> -#include "art_render.h" -#include "art_render_gradient.h" - -#include "rsvg-css.h" -#include "rsvg-defs.h" -#include "rsvg-paint-server.h" - -typedef struct _RsvgPaintServerSolid RsvgPaintServerSolid; -typedef struct _RsvgPaintServerLinGrad RsvgPaintServerLinGrad; -typedef struct _RsvgPaintServerRadGrad RsvgPaintServerRadGrad; - -struct _RsvgPaintServer { - int refcnt; - void (*free) (RsvgPaintServer *self); - void (*render) (RsvgPaintServer *self, ArtRender *ar, const RsvgPSCtx *ctx); -}; - -struct _RsvgPaintServerSolid { - RsvgPaintServer super; - guint32 rgb; -}; - -struct _RsvgPaintServerLinGrad { - RsvgPaintServer super; - RsvgLinearGradient *gradient; - ArtGradientLinear *agl; -}; - -struct _RsvgPaintServerRadGrad { - RsvgPaintServer super; - RsvgRadialGradient *gradient; - ArtGradientRadial *agr; -}; - -static void -rsvg_paint_server_solid_free (RsvgPaintServer *self) -{ - g_free (self); -} - -static void -rsvg_paint_server_solid_render (RsvgPaintServer *self, ArtRender *ar, - const RsvgPSCtx *ctx) -{ - RsvgPaintServerSolid *z = (RsvgPaintServerSolid *)self; - guint32 rgb = z->rgb; - ArtPixMaxDepth color[3]; - - color[0] = ART_PIX_MAX_FROM_8 (rgb >> 16); - color[1] = ART_PIX_MAX_FROM_8 ((rgb >> 8) & 0xff); - color[2] = ART_PIX_MAX_FROM_8 (rgb & 0xff); - - art_render_image_solid (ar, color); -} - -static RsvgPaintServer * -rsvg_paint_server_solid (guint32 rgb) -{ - RsvgPaintServerSolid *result = g_new (RsvgPaintServerSolid, 1); - - result->super.refcnt = 1; - result->super.free = rsvg_paint_server_solid_free; - result->super.render = rsvg_paint_server_solid_render; - - result->rgb = rgb; - - return &result->super; -} - -static void -rsvg_paint_server_lin_grad_free (RsvgPaintServer *self) -{ - RsvgPaintServerLinGrad *z = (RsvgPaintServerLinGrad *)self; - - g_free (z->agl->stops); - g_free (z->agl); - g_free (self); -} - -static ArtGradientStop * -rsvg_paint_art_stops_from_rsvg (RsvgGradientStops *rstops) -{ - ArtGradientStop *stops; - int n_stop = rstops->n_stop; - int i; - - stops = g_new (ArtGradientStop, n_stop); - for (i = 0; i < n_stop; i++) - { - guint32 rgba; - guint32 r, g, b, a; - - stops[i].offset = rstops->stop[i].offset; - rgba = rstops->stop[i].rgba; - /* convert from separated to premultiplied alpha */ - a = rgba & 0xff; - r = (rgba >> 24) * a + 0x80; - r = (r + (r >> 8)) >> 8; - g = ((rgba >> 16) & 0xff) * a + 0x80; - g = (g + (g >> 8)) >> 8; - b = ((rgba >> 8) & 0xff) * a + 0x80; - b = (b + (b >> 8)) >> 8; - stops[i].color[0] = ART_PIX_MAX_FROM_8(r); - stops[i].color[1] = ART_PIX_MAX_FROM_8(g); - stops[i].color[2] = ART_PIX_MAX_FROM_8(b); - stops[i].color[3] = ART_PIX_MAX_FROM_8(a); - } - return stops; -} - -static void -rsvg_paint_server_lin_grad_render (RsvgPaintServer *self, ArtRender *ar, - const RsvgPSCtx *ctx) -{ - RsvgPaintServerLinGrad *z = (RsvgPaintServerLinGrad *)self; - RsvgLinearGradient *rlg = z->gradient; - ArtGradientLinear *agl; - double x1, y1, x2, y2; - double dx, dy, scale; - - agl = z->agl; - if (agl == NULL) - { - agl = g_new (ArtGradientLinear, 1); - agl->n_stops = rlg->stops->n_stop; - agl->stops = rsvg_paint_art_stops_from_rsvg (rlg->stops); - z->agl = agl; - } - - /* compute [xy][12] in pixel space */ - /* todo: this code implicitly implements gradientUnits = userSpace */ - x1 = rlg->x1 * rlg->affine[0] + rlg->y1 * rlg->affine[2] + rlg->affine[4]; - y1 = rlg->x1 * rlg->affine[1] + rlg->y1 * rlg->affine[3] + rlg->affine[5]; - x2 = rlg->x2 * rlg->affine[0] + rlg->y2 * rlg->affine[2] + rlg->affine[4]; - y2 = rlg->x2 * rlg->affine[1] + rlg->y2 * rlg->affine[3] + rlg->affine[5]; - - /* solve a, b, c so ax1 + by1 + c = 0 and ax2 + by2 + c = 1, maximum - gradient is in x1,y1 to x2,y2 dir */ - dx = x2 - x1; - dy = y2 - y1; - scale = 1.0 / (dx * dx + dy * dy); - agl->a = dx * scale; - agl->b = dy * scale; - agl->c = -(x1 * agl->a + y1 * agl->b); - - agl->spread = rlg->spread; - art_render_gradient_linear (ar, agl, ART_FILTER_NEAREST); -} - -static RsvgPaintServer * -rsvg_paint_server_lin_grad (RsvgLinearGradient *gradient) -{ - RsvgPaintServerLinGrad *result = g_new (RsvgPaintServerLinGrad, 1); - - result->super.refcnt = 1; - result->super.free = rsvg_paint_server_lin_grad_free; - result->super.render = rsvg_paint_server_lin_grad_render; - - result->gradient = gradient; - result->agl = NULL; - - return &result->super; -} - -static void -rsvg_paint_server_rad_grad_free (RsvgPaintServer *self) -{ - RsvgPaintServerRadGrad *z = (RsvgPaintServerRadGrad *)self; - - g_free (z->agr->stops); - g_free (z->agr); - g_free (self); -} - -static void -rsvg_paint_server_rad_grad_render (RsvgPaintServer *self, ArtRender *ar, - const RsvgPSCtx *ctx) -{ - RsvgPaintServerRadGrad *z = (RsvgPaintServerRadGrad *)self; - RsvgRadialGradient *rrg = z->gradient; - ArtGradientRadial *agr; - double aff1[6], aff2[6]; - - agr = z->agr; - if (agr == NULL) - { - agr = g_new (ArtGradientRadial, 1); - agr->n_stops = rrg->stops->n_stop; - agr->stops = rsvg_paint_art_stops_from_rsvg (rrg->stops); - z->agr = agr; - } - - /* todo: this code implicitly implements gradientUnits = userSpace */ - art_affine_scale (aff1, rrg->r, rrg->r); - art_affine_translate (aff2, rrg->cx, rrg->cy); - art_affine_multiply (aff1, aff1, aff2); - art_affine_multiply (aff1, aff1, rrg->affine); - art_affine_invert (agr->affine, aff1); - - agr->fx = (rrg->fx - rrg->cx) / rrg->r; - agr->fy = (rrg->fy - rrg->cy) / rrg->r; - - art_render_gradient_radial (ar, agr, ART_FILTER_NEAREST); -} - -static RsvgPaintServer * -rsvg_paint_server_rad_grad (RsvgRadialGradient *gradient) -{ - RsvgPaintServerRadGrad *result = g_new (RsvgPaintServerRadGrad, 1); - - result->super.refcnt = 1; - result->super.free = rsvg_paint_server_rad_grad_free; - result->super.render = rsvg_paint_server_rad_grad_render; - - result->gradient = gradient; - result->agr = NULL; - - return &result->super; -} - -/** - * rsvg_paint_server_parse: Parse an SVG paint specification. - * @defs: Defs for looking up gradients. - * @str: The SVG paint specification string to parse. - * - * Parses the paint specification @str, creating a new paint server - * object. - * - * Return value: The newly created paint server, or NULL on error. - **/ -RsvgPaintServer * -rsvg_paint_server_parse (const RsvgDefs *defs, const char *str) -{ - guint32 rgb; - - if (!strcmp (str, "none")) - return NULL; - if (!strncmp (str, "url(", 4)) - { - const char *p = str + 4; - int ix; - char *name; - RsvgDefVal *val; - - while (isspace (*p)) p++; - if (*p != '#') - return NULL; - p++; - for (ix = 0; p[ix]; ix++) - if (p[ix] == ')') break; - if (p[ix] != ')') - return NULL; - name = g_strndup (p, ix); - val = rsvg_defs_lookup (defs, name); - g_free (name); - if (val == NULL) - return NULL; - switch (val->type) - { - case RSVG_DEF_LINGRAD: - return rsvg_paint_server_lin_grad ((RsvgLinearGradient *)val); - case RSVG_DEF_RADGRAD: - return rsvg_paint_server_rad_grad ((RsvgRadialGradient *)val); - default: - return NULL; - } - } - else - { - rgb = rsvg_css_parse_color (str); - return rsvg_paint_server_solid (rgb); - } -} - -/** - * rsvg_render_paint_server: Render paint server as image source for libart. - * @ar: Libart render object. - * @ps: Paint server object. - * - * Hooks up @ps as an image source for a libart rendering operation. - **/ -void -rsvg_render_paint_server (ArtRender *ar, RsvgPaintServer *ps, - const RsvgPSCtx *ctx) -{ - if (ps != NULL) - ps->render (ps, ar, ctx); -} - -/** - * rsvg_paint_server_ref: Reference a paint server object. - * @ps: The paint server object to reference. - **/ -void -rsvg_paint_server_ref (RsvgPaintServer *ps) -{ - if (ps == NULL) - return; - ps->refcnt++; -} - -/** - * rsvg_paint_server_unref: Unreference a paint server object. - * @ps: The paint server object to unreference. - **/ -void -rsvg_paint_server_unref (RsvgPaintServer *ps) -{ - if (ps == NULL) - return; - if (--ps->refcnt == 0) - ps->free (ps); -} |