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rsvg-cairo-draw.c
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rsvg-cairo-draw.c
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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set sw=4 sts=4 ts=4 expandtab: */
/*
rsvg-shapes.c: Draw shapes with cairo
Copyright (C) 2005 Dom Lachowicz <cinamod@hotmail.com>
Copyright (C) 2005 Caleb Moore <c.moore@student.unsw.edu.au>
Copyright (C) 2005 Red Hat, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library 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.
Authors: Dom Lachowicz <cinamod@hotmail.com>,
Caleb Moore <c.moore@student.unsw.edu.au>
Carl Worth <cworth@cworth.org>
*/
#include "rsvg-cairo-draw.h"
#include "rsvg-cairo-render.h"
#include "rsvg-cairo-clip.h"
#include "rsvg-styles.h"
#include "rsvg-bpath-util.h"
#include "rsvg-path.h"
#include "rsvg-filter.h"
#include "rsvg-structure.h"
#include "rsvg-image.h"
#include <math.h>
#include <string.h>
#include <pango/pangocairo.h>
static const cairo_user_data_key_t surface_pixel_data_key;
static void
_rsvg_cairo_set_shape_antialias (cairo_t * cr, ShapeRenderingProperty aa)
{
if (SHAPE_RENDERING_AUTO == aa)
cairo_set_antialias (cr, CAIRO_ANTIALIAS_DEFAULT);
else if (SHAPE_RENDERING_OPTIMIZE_SPEED == aa)
cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
else if (SHAPE_RENDERING_CRISP_EDGES == aa)
cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
else if (SHAPE_RENDERING_GEOMETRIC_PRECISION == aa)
cairo_set_antialias (cr, CAIRO_ANTIALIAS_DEFAULT);
}
static void
_rsvg_cairo_set_text_antialias (cairo_t * cr, TextRenderingProperty aa)
{
if (TEXT_RENDERING_AUTO == aa)
cairo_set_antialias (cr, CAIRO_ANTIALIAS_DEFAULT);
else if (TEXT_RENDERING_OPTIMIZE_SPEED == aa)
cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
else if (TEXT_RENDERING_OPTIMIZE_LEGIBILITY == aa)
cairo_set_antialias (cr, CAIRO_ANTIALIAS_DEFAULT);
else if (TEXT_RENDERING_GEOMETRIC_PRECISION == aa)
cairo_set_antialias (cr, CAIRO_ANTIALIAS_DEFAULT);
}
static void
_rsvg_cairo_set_operator (cairo_t * cr, RsvgCompOpType comp_op)
{
cairo_operator_t op;
switch (comp_op) {
case RSVG_COMP_OP_CLEAR:
op = CAIRO_OPERATOR_CLEAR;
break;
case RSVG_COMP_OP_SRC:
op = CAIRO_OPERATOR_SOURCE;
break;
case RSVG_COMP_OP_DST:
op = CAIRO_OPERATOR_DEST;
break;
case RSVG_COMP_OP_DST_OVER:
op = CAIRO_OPERATOR_DEST_OVER;
break;
case RSVG_COMP_OP_SRC_IN:
op = CAIRO_OPERATOR_IN;
break;
case RSVG_COMP_OP_DST_IN:
op = CAIRO_OPERATOR_DEST_IN;
break;
case RSVG_COMP_OP_SRC_OUT:
op = CAIRO_OPERATOR_OUT;
break;
case RSVG_COMP_OP_DST_OUT:
op = CAIRO_OPERATOR_DEST_OUT;
break;
case RSVG_COMP_OP_SRC_ATOP:
op = CAIRO_OPERATOR_ATOP;
break;
case RSVG_COMP_OP_DST_ATOP:
op = CAIRO_OPERATOR_DEST_ATOP;
break;
case RSVG_COMP_OP_XOR:
op = CAIRO_OPERATOR_XOR;
break;
case RSVG_COMP_OP_PLUS:
op = CAIRO_OPERATOR_ADD;
break;
case RSVG_COMP_OP_MULTIPLY:
case RSVG_COMP_OP_SCREEN:
case RSVG_COMP_OP_OVERLAY:
case RSVG_COMP_OP_DARKEN:
case RSVG_COMP_OP_LIGHTEN:
case RSVG_COMP_OP_COLOR_DODGE:
case RSVG_COMP_OP_COLOR_BURN:
case RSVG_COMP_OP_HARD_LIGHT:
case RSVG_COMP_OP_SOFT_LIGHT:
case RSVG_COMP_OP_DIFFERENCE:
case RSVG_COMP_OP_EXCLUSION:
default:
op = CAIRO_OPERATOR_OVER;
break;
}
cairo_set_operator (cr, op);
}
static void
rsvg_pixmap_destroy (gchar * pixels, gpointer data)
{
g_free (pixels);
}
static void
_pattern_add_rsvg_color_stops (cairo_pattern_t * pattern,
GPtrArray * stops, guint32 current_color_rgb, guint8 opacity)
{
gsize i;
RsvgGradientStop *stop;
RsvgNode *node;
guint32 rgba;
for (i = 0; i < stops->len; i++) {
node = (RsvgNode *) g_ptr_array_index (stops, i);
if (RSVG_NODE_TYPE (node) != RSVG_NODE_TYPE_STOP)
continue;
stop = (RsvgGradientStop *) node;
rgba = stop->rgba;
cairo_pattern_add_color_stop_rgba (pattern, stop->offset,
((rgba >> 24) & 0xff) / 255.0,
((rgba >> 16) & 0xff) / 255.0,
((rgba >> 8) & 0xff) / 255.0,
(((rgba >> 0) & 0xff) * opacity) / 255.0 / 255.0);
}
}
static void
_set_source_rsvg_linear_gradient (RsvgDrawingCtx * ctx,
RsvgLinearGradient * linear,
guint32 current_color_rgb, guint8 opacity, RsvgBbox bbox)
{
cairo_t *cr = ((RsvgCairoRender *) ctx->render)->cr;
cairo_pattern_t *pattern;
cairo_matrix_t matrix;
RsvgLinearGradient statlinear;
statlinear = *linear;
linear = &statlinear;
rsvg_linear_gradient_fix_fallback (linear);
if (linear->has_current_color)
current_color_rgb = linear->current_color;
if (linear->obj_bbox)
_rsvg_push_view_box (ctx, 1., 1.);
pattern = cairo_pattern_create_linear (_rsvg_css_normalize_length (&linear->x1, ctx, 'h'),
_rsvg_css_normalize_length (&linear->y1, ctx, 'v'),
_rsvg_css_normalize_length (&linear->x2, ctx, 'h'),
_rsvg_css_normalize_length (&linear->y2, ctx, 'v'));
if (linear->obj_bbox)
_rsvg_pop_view_box (ctx);
cairo_matrix_init (&matrix,
linear->affine[0], linear->affine[1],
linear->affine[2], linear->affine[3], linear->affine[4], linear->affine[5]);
if (linear->obj_bbox) {
cairo_matrix_t bboxmatrix;
cairo_matrix_init (&bboxmatrix, bbox.w, 0, 0, bbox.h, bbox.x, bbox.y);
cairo_matrix_multiply (&matrix, &matrix, &bboxmatrix);
}
cairo_matrix_invert (&matrix);
cairo_pattern_set_matrix (pattern, &matrix);
if (linear->spread == RSVG_GRADIENT_REFLECT)
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REFLECT);
else if (linear->spread == RSVG_GRADIENT_REPEAT)
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
_pattern_add_rsvg_color_stops (pattern, linear->super.children, current_color_rgb, opacity);
cairo_set_source (cr, pattern);
cairo_pattern_destroy (pattern);
}
static void
_set_source_rsvg_radial_gradient (RsvgDrawingCtx * ctx,
RsvgRadialGradient * radial,
guint32 current_color_rgb, guint8 opacity, RsvgBbox bbox)
{
cairo_t *cr = ((RsvgCairoRender *) ctx->render)->cr;
cairo_pattern_t *pattern;
cairo_matrix_t matrix;
RsvgRadialGradient statradial;
statradial = *radial;
radial = &statradial;
rsvg_radial_gradient_fix_fallback (radial);
if (radial->has_current_color)
current_color_rgb = radial->current_color;
if (radial->obj_bbox)
_rsvg_push_view_box (ctx, 1., 1.);
pattern = cairo_pattern_create_radial (_rsvg_css_normalize_length (&radial->fx, ctx, 'h'),
_rsvg_css_normalize_length (&radial->fy, ctx, 'v'), 0.0,
_rsvg_css_normalize_length (&radial->cx, ctx, 'h'),
_rsvg_css_normalize_length (&radial->cy, ctx, 'v'),
_rsvg_css_normalize_length (&radial->r, ctx, 'o'));
if (radial->obj_bbox)
_rsvg_pop_view_box (ctx);
cairo_matrix_init (&matrix,
radial->affine[0], radial->affine[1],
radial->affine[2], radial->affine[3], radial->affine[4], radial->affine[5]);
if (radial->obj_bbox) {
cairo_matrix_t bboxmatrix;
cairo_matrix_init (&bboxmatrix, bbox.w, 0, 0, bbox.h, bbox.x, bbox.y);
cairo_matrix_multiply (&matrix, &matrix, &bboxmatrix);
}
cairo_matrix_invert (&matrix);
cairo_pattern_set_matrix (pattern, &matrix);
if (radial->spread == RSVG_GRADIENT_REFLECT)
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REFLECT);
else if (radial->spread == RSVG_GRADIENT_REPEAT)
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
_pattern_add_rsvg_color_stops (pattern, radial->super.children, current_color_rgb, opacity);
cairo_set_source (cr, pattern);
cairo_pattern_destroy (pattern);
}
static void
_set_source_rsvg_solid_colour (RsvgDrawingCtx * ctx,
RsvgSolidColour * colour, guint8 opacity, guint32 current_colour)
{
cairo_t *cr = ((RsvgCairoRender *) ctx->render)->cr;
guint32 rgb = colour->rgb;
double r, g, b;
if (colour->currentcolour)
rgb = current_colour;
r = ((rgb >> 16) & 0xff) / 255.0;
g = ((rgb >> 8) & 0xff) / 255.0;
b = ((rgb >> 0) & 0xff) / 255.0;
if (opacity == 0xff)
cairo_set_source_rgb (cr, r, g, b);
else
cairo_set_source_rgba (cr, r, g, b, opacity / 255.0);
}
static void
_set_source_rsvg_pattern (RsvgDrawingCtx * ctx,
RsvgPattern * rsvg_pattern, guint8 opacity, RsvgBbox bbox)
{
RsvgCairoRender *render = (RsvgCairoRender *) ctx->render;
RsvgPattern local_pattern = *rsvg_pattern;
cairo_t *cr_render, *cr_pattern;
cairo_pattern_t *pattern;
cairo_surface_t *surface;
cairo_matrix_t matrix;
int i;
double affine[6], caffine[6], bbwscale, bbhscale, scwscale, schscale;
double taffine[6], patternw, patternh, patternx, patterny;
int pw, ph;
rsvg_pattern = &local_pattern;
rsvg_pattern_fix_fallback (rsvg_pattern);
cr_render = render->cr;
_rsvg_affine_identity (affine);
_rsvg_affine_identity (caffine);
if (rsvg_pattern->obj_bbox)
_rsvg_push_view_box (ctx, 1., 1.);
patternx = _rsvg_css_normalize_length (&rsvg_pattern->x, ctx, 'h');
patterny = _rsvg_css_normalize_length (&rsvg_pattern->y, ctx, 'v');
patternw = _rsvg_css_normalize_length (&rsvg_pattern->width, ctx, 'h');
patternh = _rsvg_css_normalize_length (&rsvg_pattern->height, ctx, 'v');
if (rsvg_pattern->obj_bbox)
_rsvg_pop_view_box (ctx);
/* Work out the size of the rectangle so it takes into account the object bounding box */
if (rsvg_pattern->obj_bbox) {
bbwscale = bbox.w;
bbhscale = bbox.h;
} else {
bbwscale = 1.0;
bbhscale = 1.0;
}
_rsvg_affine_multiply (taffine, rsvg_pattern->affine, rsvg_current_state (ctx)->affine);
scwscale = sqrt (taffine[0] * taffine[0] + taffine[2] * taffine[2]);
schscale = sqrt (taffine[1] * taffine[1] + taffine[3] * taffine[3]);
pw = patternw * bbwscale * scwscale;
ph = patternh * bbhscale * schscale;
scwscale = (double) pw / (double) (patternw * bbwscale);
schscale = (double) ph / (double) (patternh * bbhscale);
surface = cairo_surface_create_similar (cairo_get_target (cr_render),
CAIRO_CONTENT_COLOR_ALPHA, pw, ph);
cr_pattern = cairo_create (surface);
/* Create the pattern coordinate system */
if (rsvg_pattern->obj_bbox) {
/* subtract the pattern origin */
affine[4] = bbox.x + patternx * bbox.w;
affine[5] = bbox.y + patterny * bbox.h;
} else {
/* subtract the pattern origin */
affine[4] = patternx;
affine[5] = patterny;
}
/* Apply the pattern transform */
_rsvg_affine_multiply (affine, affine, rsvg_pattern->affine);
/* Create the pattern contents coordinate system */
if (rsvg_pattern->vbox.active) {
/* If there is a vbox, use that */
double w, h, x, y;
w = patternw * bbwscale;
h = patternh * bbhscale;
x = 0;
y = 0;
rsvg_preserve_aspect_ratio (rsvg_pattern->preserve_aspect_ratio,
rsvg_pattern->vbox.w, rsvg_pattern->vbox.h, &w, &h, &x, &y);
x -= rsvg_pattern->vbox.x * w / rsvg_pattern->vbox.w;
y -= rsvg_pattern->vbox.y * h / rsvg_pattern->vbox.h;
caffine[0] = w / rsvg_pattern->vbox.w;
caffine[3] = h / rsvg_pattern->vbox.h;
caffine[4] = x;
caffine[5] = y;
_rsvg_push_view_box (ctx, rsvg_pattern->vbox.w, rsvg_pattern->vbox.h);
} else if (rsvg_pattern->obj_cbbox) {
/* If coords are in terms of the bounding box, use them */
caffine[0] = bbox.w;
caffine[3] = bbox.h;
_rsvg_push_view_box (ctx, 1., 1.);
}
if (scwscale != 1.0 || schscale != 1.0) {
double scalematrix[6];
_rsvg_affine_scale (scalematrix, scwscale, schscale);
_rsvg_affine_multiply (caffine, caffine, scalematrix);
_rsvg_affine_scale (scalematrix, 1. / scwscale, 1. / schscale);
_rsvg_affine_multiply (affine, scalematrix, affine);
}
/* Draw to another surface */
render->cr = cr_pattern;
/* Set up transformations to be determined by the contents units */
rsvg_state_push (ctx);
for (i = 0; i < 6; i++)
rsvg_current_state (ctx)->personal_affine[i] =
rsvg_current_state (ctx)->affine[i] = caffine[i];
/* Draw everything */
_rsvg_node_draw_children ((RsvgNode *) rsvg_pattern, ctx, 2);
/* Return to the original coordinate system */
rsvg_state_pop (ctx);
/* Set the render to draw where it used to */
render->cr = cr_render;
pattern = cairo_pattern_create_for_surface (surface);
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
cairo_matrix_init (&matrix, affine[0], affine[1], affine[2], affine[3], affine[4], affine[5]);
cairo_matrix_invert (&matrix);
cairo_pattern_set_matrix (pattern, &matrix);
cairo_pattern_set_filter (pattern, CAIRO_FILTER_BEST);
cairo_set_source (cr_render, pattern);
cairo_pattern_destroy (pattern);
cairo_destroy (cr_pattern);
cairo_surface_destroy (surface);
if (rsvg_pattern->obj_cbbox || rsvg_pattern->vbox.active)
_rsvg_pop_view_box (ctx);
}
/* note: _set_source_rsvg_paint_server does not change cairo's CTM */
static void
_set_source_rsvg_paint_server (RsvgDrawingCtx * ctx,
guint32 current_color_rgb,
RsvgPaintServer * ps,
guint8 opacity, RsvgBbox bbox, guint32 current_colour)
{
switch (ps->type) {
case RSVG_PAINT_SERVER_LIN_GRAD:
_set_source_rsvg_linear_gradient (ctx, ps->core.lingrad, current_color_rgb, opacity, bbox);
break;
case RSVG_PAINT_SERVER_RAD_GRAD:
_set_source_rsvg_radial_gradient (ctx, ps->core.radgrad, current_color_rgb, opacity, bbox);
break;
case RSVG_PAINT_SERVER_SOLID:
_set_source_rsvg_solid_colour (ctx, ps->core.colour, opacity, current_colour);
break;
case RSVG_PAINT_SERVER_PATTERN:
_set_source_rsvg_pattern (ctx, ps->core.pattern, opacity, bbox);
break;
}
}
static void
_set_rsvg_affine (RsvgCairoRender * render, const double affine[6])
{
cairo_t * cr = render->cr;
cairo_matrix_t matrix;
gboolean nest = cr != render->initial_cr;
cairo_matrix_init (&matrix,
affine[0], affine[1],
affine[2], affine[3],
affine[4] + (nest ? 0 : render->offset_x),
affine[5] + (nest ? 0 : render->offset_y));
cairo_set_matrix (cr, &matrix);
}
PangoContext *
rsvg_cairo_create_pango_context (RsvgDrawingCtx * ctx)
{
PangoFontMap *fontmap;
PangoContext *context;
RsvgCairoRender *render = (RsvgCairoRender *) ctx->render;
fontmap = pango_cairo_font_map_get_default ();
context = pango_cairo_font_map_create_context (PANGO_CAIRO_FONT_MAP (fontmap));
pango_cairo_update_context (render->cr, context);
pango_cairo_context_set_resolution (context, ctx->dpi_y);
return context;
}
void
rsvg_cairo_render_pango_layout (RsvgDrawingCtx * ctx, PangoLayout * layout, double x, double y)
{
RsvgCairoRender *render = (RsvgCairoRender *) ctx->render;
RsvgState *state = rsvg_current_state (ctx);
PangoRectangle ink;
RsvgBbox bbox;
_rsvg_cairo_set_text_antialias (render->cr, state->text_rendering_type);
_set_rsvg_affine (render, state->affine);
pango_layout_get_extents (layout, &ink, NULL);
rsvg_bbox_init (&bbox, state->affine);
bbox.x = x + ink.x / (double)PANGO_SCALE;
bbox.y = y + ink.y / (double)PANGO_SCALE;
bbox.w = ink.width / (double)PANGO_SCALE;
bbox.h = ink.height / (double)PANGO_SCALE;
bbox.virgin = 0;
if (state->fill) {
cairo_move_to (render->cr, x, y);
rsvg_bbox_insert (&render->bbox, &bbox);
_set_source_rsvg_paint_server (ctx,
state->current_color,
state->fill,
state->fill_opacity,
bbox, rsvg_current_state (ctx)->current_color);
pango_cairo_show_layout (render->cr, layout);
}
if (state->stroke) {
cairo_move_to (render->cr, x, y);
rsvg_bbox_insert (&render->bbox, &bbox);
pango_cairo_layout_path (render->cr, layout);
_set_source_rsvg_paint_server (ctx,
state->current_color,
state->stroke,
state->stroke_opacity,
bbox, rsvg_current_state (ctx)->current_color);
cairo_set_line_width (render->cr, _rsvg_css_normalize_length (&state->stroke_width, ctx, 'h'));
cairo_set_miter_limit (render->cr, state->miter_limit);
cairo_set_line_cap (render->cr, (cairo_line_cap_t) state->cap);
cairo_set_line_join (render->cr, (cairo_line_join_t) state->join);
cairo_set_dash (render->cr, state->dash.dash, state->dash.n_dash,
_rsvg_css_normalize_length (&state->dash.offset, ctx, 'o'));
cairo_stroke (render->cr);
}
}
void
rsvg_cairo_render_path (RsvgDrawingCtx * ctx, const RsvgBpathDef * bpath_def)
{
RsvgCairoRender *render = (RsvgCairoRender *) ctx->render;
RsvgState *state = rsvg_current_state (ctx);
cairo_t *cr;
RsvgBpath *bpath;
int i;
int need_tmpbuf = 0;
RsvgBbox bbox;
double backup_tolerance;
if (state->fill == NULL && state->stroke == NULL)
return;
need_tmpbuf = ((state->fill != NULL) && (state->stroke != NULL) && state->opacity != 0xff)
|| state->clip_path_ref || state->mask || state->filter
|| (state->comp_op != RSVG_COMP_OP_SRC_OVER);
if (need_tmpbuf)
rsvg_cairo_push_discrete_layer (ctx);
cr = render->cr;
_rsvg_cairo_set_shape_antialias (cr, state->shape_rendering_type);
_set_rsvg_affine (render, state->affine);
cairo_set_line_width (cr, _rsvg_css_normalize_length (&state->stroke_width, ctx, 'h'));
cairo_set_miter_limit (cr, state->miter_limit);
cairo_set_line_cap (cr, (cairo_line_cap_t) state->cap);
cairo_set_line_join (cr, (cairo_line_join_t) state->join);
cairo_set_dash (cr, state->dash.dash, state->dash.n_dash,
_rsvg_css_normalize_length (&state->dash.offset, ctx, 'o'));
for (i = 0; i < bpath_def->n_bpath; i++) {
bpath = &bpath_def->bpath[i];
switch (bpath->code) {
case RSVG_MOVETO:
cairo_close_path (cr);
/* fall-through */
case RSVG_MOVETO_OPEN:
cairo_move_to (cr, bpath->x3, bpath->y3);
break;
case RSVG_CURVETO:
cairo_curve_to (cr, bpath->x1, bpath->y1, bpath->x2, bpath->y2, bpath->x3, bpath->y3);
break;
case RSVG_LINETO:
cairo_line_to (cr, bpath->x3, bpath->y3);
break;
case RSVG_END:
break;
}
}
rsvg_bbox_init (&bbox, state->affine);
backup_tolerance = cairo_get_tolerance (cr);
cairo_set_tolerance (cr, 1.0);
/* dropping the precision of cairo's bezier subdivision, yielding 2x
_rendering_ time speedups, are these rather expensive operations
really needed here? */
if (state->fill != NULL) {
RsvgBbox fb;
rsvg_bbox_init (&fb, state->affine);
cairo_fill_extents (cr, &fb.x, &fb.y, &fb.w, &fb.h);
fb.w -= fb.x;
fb.h -= fb.y;
fb.virgin = 0;
rsvg_bbox_insert (&bbox, &fb);
}
if (state->stroke != NULL) {
RsvgBbox sb;
rsvg_bbox_init (&sb, state->affine);
cairo_stroke_extents (cr, &sb.x, &sb.y, &sb.w, &sb.h);
sb.w -= sb.x;
sb.h -= sb.y;
sb.virgin = 0;
rsvg_bbox_insert (&bbox, &sb);
}
cairo_set_tolerance (cr, backup_tolerance);
rsvg_bbox_insert (&render->bbox, &bbox);
if (state->fill != NULL) {
int opacity;
if (state->fill_rule == FILL_RULE_EVENODD)
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
else /* state->fill_rule == FILL_RULE_NONZERO */
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_WINDING);
if (!need_tmpbuf)
opacity = (state->fill_opacity * state->opacity) / 255;
else
opacity = state->fill_opacity;
_set_source_rsvg_paint_server (ctx,
state->current_color,
state->fill,
opacity, bbox, rsvg_current_state (ctx)->current_color);
if (state->stroke != NULL)
cairo_fill_preserve (cr);
else
cairo_fill (cr);
}
if (state->stroke != NULL) {
int opacity;
if (!need_tmpbuf)
opacity = (state->stroke_opacity * state->opacity) / 255;
else
opacity = state->stroke_opacity;
_set_source_rsvg_paint_server (ctx,
state->current_color,
state->stroke,
opacity, bbox, rsvg_current_state (ctx)->current_color);
cairo_stroke (cr);
}
if (need_tmpbuf)
rsvg_cairo_pop_discrete_layer (ctx);
}
void
rsvg_cairo_render_image (RsvgDrawingCtx * ctx, const GdkPixbuf * pixbuf,
double pixbuf_x, double pixbuf_y, double w, double h)
{
RsvgCairoRender *render = (RsvgCairoRender *) ctx->render;
RsvgState *state = rsvg_current_state (ctx);
gint width = gdk_pixbuf_get_width (pixbuf);
gint height = gdk_pixbuf_get_height (pixbuf);
double dwidth = width, dheight = height;
guchar *gdk_pixels = gdk_pixbuf_get_pixels (pixbuf);
int gdk_rowstride = gdk_pixbuf_get_rowstride (pixbuf);
int n_channels = gdk_pixbuf_get_n_channels (pixbuf);
guchar *cairo_pixels;
cairo_format_t format;
cairo_surface_t *surface;
int j;
RsvgBbox bbox;
if (pixbuf == NULL)
return;
cairo_pixels = g_try_malloc (4 * width * height);
if (!cairo_pixels)
return;
rsvg_bbox_init (&bbox, state->affine);
bbox.x = pixbuf_x;
bbox.y = pixbuf_y;
bbox.w = w;
bbox.h = h;
bbox.virgin = 0;
_set_rsvg_affine (render, state->affine);
cairo_scale (render->cr, w / dwidth, h / dheight);
pixbuf_x *= dwidth / w;
pixbuf_y *= dheight / h;
if (n_channels == 3)
format = CAIRO_FORMAT_RGB24;
else
format = CAIRO_FORMAT_ARGB32;
surface = cairo_image_surface_create_for_data ((unsigned char *) cairo_pixels,
format, width, height, 4 * width);
cairo_surface_set_user_data (surface, &surface_pixel_data_key, cairo_pixels, (cairo_destroy_func_t) g_free);
for (j = height; j; j--) {
guchar *p = gdk_pixels;
guchar *q = cairo_pixels;
if (n_channels == 3) {
guchar *end = p + 3 * width;
while (p < end) {
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
q[0] = p[2];
q[1] = p[1];
q[2] = p[0];
#else
q[1] = p[0];
q[2] = p[1];
q[3] = p[2];
#endif
p += 3;
q += 4;
}
} else {
guchar *end = p + 4 * width;
guint t1, t2, t3;
#define MULT(d,c,a,t) G_STMT_START { t = c * a + 0x7f; d = ((t >> 8) + t) >> 8; } G_STMT_END
while (p < end) {
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
MULT (q[0], p[2], p[3], t1);
MULT (q[1], p[1], p[3], t2);
MULT (q[2], p[0], p[3], t3);
q[3] = p[3];
#else
q[0] = p[3];
MULT (q[1], p[0], p[3], t1);
MULT (q[2], p[1], p[3], t2);
MULT (q[3], p[2], p[3], t3);
#endif
p += 4;
q += 4;
}
#undef MULT
}
gdk_pixels += gdk_rowstride;
cairo_pixels += 4 * width;
}
_rsvg_cairo_set_operator (render->cr, state->comp_op);
#if 1
cairo_set_source_surface (render->cr, surface, pixbuf_x, pixbuf_y);
#else
{
cairo_pattern_t *pattern;
cairo_matrix_t matrix;
pattern = cairo_pattern_create_for_surface (surface);
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_PAD);
cairo_matrix_init_translate (&matrix, -pixbuf_x, -pixbuf_y);
cairo_pattern_set_matrix (pattern, &matrix);
cairo_set_source (render->cr, pattern);
cairo_pattern_destroy (pattern);
}
#endif
cairo_paint (render->cr);
cairo_surface_destroy (surface);
rsvg_bbox_insert (&render->bbox, &bbox);
}
static void
rsvg_cairo_generate_mask (cairo_t * cr, RsvgMask * self, RsvgDrawingCtx * ctx, RsvgBbox * bbox)
{
cairo_surface_t *surface;
cairo_t *mask_cr, *save_cr;
RsvgCairoRender *render = (RsvgCairoRender *) ctx->render;
RsvgState *state = rsvg_current_state (ctx);
guint8 *pixels;
guint32 width = render->width, height = render->height;
guint32 rowstride = width * 4, row, i;
double affinesave[6];
double sx, sy, sw, sh;
gboolean nest = cr != render->initial_cr;
pixels = g_try_malloc0 (height * rowstride);
if (pixels == NULL)
return;
if (self->maskunits == objectBoundingBox)
_rsvg_push_view_box (ctx, 1, 1);
sx = _rsvg_css_normalize_length (&self->x, ctx, 'h');
sy = _rsvg_css_normalize_length (&self->y, ctx, 'v');
sw = _rsvg_css_normalize_length (&self->width, ctx, 'h');
sh = _rsvg_css_normalize_length (&self->height, ctx, 'v');
if (self->maskunits == objectBoundingBox)
_rsvg_pop_view_box (ctx);
surface = cairo_image_surface_create_for_data (pixels,
CAIRO_FORMAT_ARGB32, width, height, rowstride);
cairo_surface_set_user_data (surface, &surface_pixel_data_key, pixels, (cairo_destroy_func_t) g_free);
mask_cr = cairo_create (surface);
save_cr = render->cr;
render->cr = mask_cr;
if (self->maskunits == objectBoundingBox)
rsvg_cairo_add_clipping_rect (ctx,
sx * bbox->w + bbox->x,
sy * bbox->h + bbox->y, sw * bbox->w, sh * bbox->h);
else
rsvg_cairo_add_clipping_rect (ctx, sx, sy, sw, sh);
/* Horribly dirty hack to have the bbox premultiplied to everything */
if (self->contentunits == objectBoundingBox) {
double bbtransform[6];
bbtransform[0] = bbox->w;
bbtransform[1] = 0.;
bbtransform[2] = 0.;
bbtransform[3] = bbox->h;
bbtransform[4] = bbox->x;
bbtransform[5] = bbox->y;
for (i = 0; i < 6; i++)
affinesave[i] = self->super.state->affine[i];
_rsvg_affine_multiply (self->super.state->affine, bbtransform, self->super.state->affine);
_rsvg_push_view_box (ctx, 1, 1);
}
rsvg_state_push (ctx);
_rsvg_node_draw_children (&self->super, ctx, 0);
rsvg_state_pop (ctx);
if (self->contentunits == objectBoundingBox) {
_rsvg_pop_view_box (ctx);
for (i = 0; i < 6; i++)
self->super.state->affine[i] = affinesave[i];
}
render->cr = save_cr;
for (row = 0; row < height; row++) {
guint8 *row_data = (pixels + (row * rowstride));
for (i = 0; i < width; i++) {
guint32 *pixel = (guint32 *) row_data + i;
*pixel = ((((*pixel & 0x00ff0000) >> 16) * 13817 +
((*pixel & 0x0000ff00) >> 8) * 46518 +
((*pixel & 0x000000ff)) * 4688) * state->opacity);
}
}
cairo_destroy (mask_cr);
cairo_identity_matrix (cr);
cairo_mask_surface (cr, surface,
nest ? 0 : render->offset_x,
nest ? 0 : render->offset_y);
cairo_surface_destroy (surface);
}
static void
rsvg_cairo_push_early_clips (RsvgDrawingCtx * ctx)
{
cairo_save (((RsvgCairoRender *) ctx->render)->cr);
if (rsvg_current_state (ctx)->clip_path_ref)
if (((RsvgClipPath *) rsvg_current_state (ctx)->clip_path_ref)->units == userSpaceOnUse)
rsvg_cairo_clip (ctx, rsvg_current_state (ctx)->clip_path_ref, NULL);
}
static void
rsvg_cairo_push_render_stack (RsvgDrawingCtx * ctx)
{
/* XXX: Untested, probably needs help wrt filters */
RsvgCairoRender *render = (RsvgCairoRender *) ctx->render;
cairo_surface_t *surface;
cairo_t *child_cr;
RsvgBbox *bbox;
RsvgState *state = rsvg_current_state (ctx);
gboolean lateclip = FALSE;
if (rsvg_current_state (ctx)->clip_path_ref)
if (((RsvgClipPath *) rsvg_current_state (ctx)->clip_path_ref)->units == objectBoundingBox)
lateclip = TRUE;
if (state->opacity == 0xFF
&& !state->filter && !state->mask && !lateclip && (state->comp_op == RSVG_COMP_OP_SRC_OVER)
&& (state->enable_background == RSVG_ENABLE_BACKGROUND_ACCUMULATE))
return;
if (!state->filter)
surface = cairo_surface_create_similar (cairo_get_target (render->cr),
CAIRO_CONTENT_COLOR_ALPHA,
render->width, render->height);
else {
guchar *pixels;
int rowstride = render->width * 4;
GdkPixbuf *pixbuf;
pixels = g_try_malloc0 (render->width * render->height * 4);
if (pixels == NULL)
return; /* not really correct, but the best we can do here */
/* The pixbuf takes ownership of @pixels */
pixbuf = gdk_pixbuf_new_from_data (pixels,
GDK_COLORSPACE_RGB,
TRUE,
8,
render->width,
render->height,
rowstride,
(GdkPixbufDestroyNotify) rsvg_pixmap_destroy,
NULL);
render->pixbuf_stack = g_list_prepend (render->pixbuf_stack, pixbuf);
surface = cairo_image_surface_create_for_data (pixels,
CAIRO_FORMAT_ARGB32,
render->width, render->height, rowstride);
/* Also keep a reference to the pixbuf which owns the pixels */
cairo_surface_set_user_data (surface, &surface_pixel_data_key,
g_object_ref (pixbuf),
(cairo_destroy_func_t) g_object_unref);
}
child_cr = cairo_create (surface);
cairo_surface_destroy (surface);
render->cr_stack = g_list_prepend (render->cr_stack, render->cr);
render->cr = child_cr;
bbox = g_new (RsvgBbox, 1);
*bbox = render->bbox;
render->bb_stack = g_list_prepend (render->bb_stack, bbox);
rsvg_bbox_init (&render->bbox, state->affine);
}
void
rsvg_cairo_push_discrete_layer (RsvgDrawingCtx * ctx)
{
rsvg_cairo_push_early_clips (ctx);
rsvg_cairo_push_render_stack (ctx);
}
static void
rsvg_cairo_pop_render_stack (RsvgDrawingCtx * ctx)
{
RsvgCairoRender *render = (RsvgCairoRender *) ctx->render;
cairo_t *child_cr = render->cr;
gboolean lateclip = FALSE;
cairo_surface_t *surface = NULL;
RsvgState *state = rsvg_current_state (ctx);
gboolean nest;
if (rsvg_current_state (ctx)->clip_path_ref)
if (((RsvgClipPath *) rsvg_current_state (ctx)->clip_path_ref)->units == objectBoundingBox)
lateclip = TRUE;
if (state->opacity == 0xFF
&& !state->filter && !state->mask && !lateclip && (state->comp_op == RSVG_COMP_OP_SRC_OVER)
&& (state->enable_background == RSVG_ENABLE_BACKGROUND_ACCUMULATE))
return;
if (state->filter) {
GdkPixbuf *pixbuf = render->pixbuf_stack->data;
GdkPixbuf *output;
render->pixbuf_stack = g_list_remove (render->pixbuf_stack, pixbuf);
output = rsvg_filter_render (state->filter, pixbuf, ctx, &render->bbox, "2103");
g_object_unref (pixbuf);
surface = cairo_image_surface_create_for_data (gdk_pixbuf_get_pixels (output),
CAIRO_FORMAT_ARGB32,
gdk_pixbuf_get_width (output),
gdk_pixbuf_get_height (output),
gdk_pixbuf_get_rowstride (output));
cairo_surface_set_user_data (surface, &surface_pixel_data_key,
output,
(cairo_destroy_func_t) g_object_unref);
} else
surface = cairo_get_target (child_cr);
render->cr = (cairo_t *) render->cr_stack->data;
render->cr_stack = g_list_delete_link (render->cr_stack, render->cr_stack);
nest = render->cr != render->initial_cr;
cairo_identity_matrix (render->cr);
cairo_set_source_surface (render->cr, surface,
nest ? 0 : render->offset_x,