#ifdef HAVE_CONFIG_H

# include "config.h"

#endif

#ifndef PANGO_ENABLE_BACKEND

#define PANGO_ENABLE_BACKEND

#endif

#ifndef PANGO_ENABLE_ENGINE

#define PANGO_ENABLE_ENGINE

#endif

#include <signal.h>

#include <errno.h>

#include <boost/scoped_ptr.hpp>

#include "libnrtype/Layout-TNG.h"

#include <2geom/transforms.h>

#include <2geom/pathvector.h>

#include <glib.h>

#include <glibmm/i18n.h>

#include "display/curve.h"

#include "display/canvas-bpath.h"

#include "display/cairo-utils.h"

#include "sp-item.h"

#include "sp-item-group.h"

#include "style.h"

#include "sp-marker.h"

#include "sp-linear-gradient.h"

#include "sp-radial-gradient.h"

#include "sp-root.h"

#include "sp-shape.h"

#include "sp-use.h"

#include "sp-text.h"

#include "sp-flowtext.h"

#include "sp-hatch-path.h"

#include "sp-image.h"

#include "sp-symbol.h"

#include "sp-pattern.h"

#include "sp-mask.h"

#include "sp-clippath.h"

#include "util/units.h"

#include "helper/png-write.h"

#include "helper/pixbuf-ops.h"

#include "cairo-renderer.h"

#include "cairo-render-context.h"

#include "extension/system.h"

#include "io/sys.h"

#include <cairo.h>

#include "document.h"

#ifdef CAIRO_HAS_PDF_SURFACE

#include <cairo-pdf.h>

#endif

#ifdef CAIRO_HAS_PS_SURFACE

#include <cairo-ps.h>

#endif

#define TRACE(_args)

#define TEST(_args)

struct SPClipPathView {

SPClipPathView *next;

unsigned int key;

Inkscape::DrawingItem *arenaitem;

Geom::OptRect bbox;

};

struct SPMaskView {

SPMaskView *next;

unsigned int key;

Inkscape::DrawingItem *arenaitem;

Geom::OptRect bbox;

};

namespace Inkscape {

namespace Extension {

namespace Internal {

CairoRenderer::CairoRenderer(void)

{}

CairoRenderer::~CairoRenderer(void)

{

/* restore default signal handling for SIGPIPE */

#if !defined(_WIN32) && !defined(__WIN32__)

(void) signal(SIGPIPE, SIG_DFL);

#endif

return;

}

CairoRenderContext*

CairoRenderer::createContext(void)

{

CairoRenderContext *new_context = new CairoRenderContext(this);

g_assert( new_context != NULL );

new_context->_state_stack = NULL;

new_context->_state = NULL;

// create initial render state

CairoRenderState *state = new_context->_createState();

state->transform = Geom::identity();

new_context->_state_stack = g_slist_prepend(new_context->_state_stack, state);

new_context->_state = state;

return new_context;

}

CairoRenderer::destroyContext(CairoRenderContext *ctx)

{

delete ctx;

}

static void sp_item_invoke_render(SPItem *item, CairoRenderContext *ctx);

static void sp_group_render(SPGroup *group, CairoRenderContext *ctx);

static void sp_use_render(SPUse *use, CairoRenderContext *ctx);

static void sp_shape_render(SPShape *shape, CairoRenderContext *ctx);

static void sp_text_render(SPText *text, CairoRenderContext *ctx);

static void sp_flowtext_render(SPFlowtext *flowtext, CairoRenderContext *ctx);

static void sp_image_render(SPImage *image, CairoRenderContext *ctx);

static void sp_symbol_render(SPSymbol *symbol, CairoRenderContext *ctx);

static void sp_asbitmap_render(SPItem *item, CairoRenderContext *ctx);

static void sp_shape_render_invoke_marker_rendering(SPMarker* marker, Geom::Affine tr, SPStyle* style, CairoRenderContext *ctx)

{

bool render = true;

if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {

if (style->stroke_width.computed > 1e-9) {

tr = Geom::Scale(style->stroke_width.computed) * tr;

} else {

render = false; // stroke width zero and marker is thus scaled down to zero, skip

}

}

if (render) {

SPItem* marker_item = sp_item_first_item_child(marker);

if (marker_item) {

tr = (Geom::Affine)marker_item->transform * (Geom::Affine)marker->c2p * tr;

Geom::Affine old_tr = marker_item->transform;

marker_item->transform = tr;

ctx->getRenderer()->renderItem (ctx, marker_item);

marker_item->transform = old_tr;

}

}

}

static void sp_shape_render(SPShape *shape, CairoRenderContext *ctx)

{

if (!shape->_curve) {

return;

}

Geom::OptRect pbox = shape->geometricBounds();

SPStyle* style = shape->style;

Geom::PathVector const & pathv = shape->_curve->get_pathvector();

if (pathv.empty()) {

return;

}

ctx->renderPathVector(pathv, style, pbox);

// START marker

for (int i = 0; i < 2; i++) { // SP_MARKER_LOC and SP_MARKER_LOC_START

if ( shape->_marker[i] ) {

SPMarker* marker = shape->_marker[i];

Geom::Affine tr;

if (marker->orient_mode == MARKER_ORIENT_AUTO) {

tr = sp_shape_marker_get_transform_at_start(pathv.begin()->front());

} else if (marker->orient_mode == MARKER_ORIENT_AUTO_START_REVERSE) {

tr = Geom::Rotate::from_degrees( 180.0 ) * sp_shape_marker_get_transform_at_start(pathv.begin()->front());

} else {

tr = Geom::Rotate::from_degrees(marker->orient.computed) * Geom::Translate(pathv.begin()->front().pointAt(0));

}

sp_shape_render_invoke_marker_rendering(marker, tr, style, ctx);

}

}

// MID marker

for (int i = 0; i < 3; i += 2) { // SP_MARKER_LOC and SP_MARKER_LOC_MID

if ( !shape->_marker[i] ) continue;

SPMarker* marker = shape->_marker[i];

for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {

// START position

if ( path_it != pathv.begin()

&& ! ((path_it == (pathv.end()-1)) && (path_it->size_default() == 0)) ) // if this is the last path and it is a moveto-only, there is no mid marker there

{

Geom::Affine tr;

if (marker->orient_mode != MARKER_ORIENT_ANGLE) {

tr = sp_shape_marker_get_transform_at_start(path_it->front());

} else {

tr = Geom::Rotate::from_degrees(marker->orient.computed) * Geom::Translate(path_it->front().pointAt(0));

}

sp_shape_render_invoke_marker_rendering(marker, tr, style, ctx);

}

// MID position

if (path_it->size_default() > 1) {

Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve

Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve

while (curve_it2 != path_it->end_default())

{

/* Put marker between curve_it1 and curve_it2.

Geom::Affine tr;

if (marker->orient_mode != MARKER_ORIENT_ANGLE) {

tr = sp_shape_marker_get_transform(*curve_it1, *curve_it2);

} else {

tr = Geom::Rotate::from_degrees(marker->orient.computed) * Geom::Translate(curve_it1->pointAt(1));

}

sp_shape_render_invoke_marker_rendering(marker, tr, style, ctx);

++curve_it1;

++curve_it2;

}

}

// END position

if ( path_it != (pathv.end()-1) && !path_it->empty()) {

Geom::Curve const &lastcurve = path_it->back_default();

Geom::Affine tr;

if (marker->orient_mode != MARKER_ORIENT_ANGLE) {

tr = sp_shape_marker_get_transform_at_end(lastcurve);

} else {

tr = Geom::Rotate::from_degrees(marker->orient.computed) * Geom::Translate(lastcurve.pointAt(1));

}

sp_shape_render_invoke_marker_rendering(marker, tr, style, ctx);

}

}

}

// END marker

for (int i = 0; i < 4; i += 3) { // SP_MARKER_LOC and SP_MARKER_LOC_END

if ( shape->_marker[i] ) {

SPMarker* marker = shape->_marker[i];

/* Get reference to last curve in the path.

Geom::Path const &path_last = pathv.back();

unsigned int index = path_last.size_default();

if (index > 0) {

index--;

}

Geom::Curve const &lastcurve = path_last[index];

Geom::Affine tr;

if (marker->orient_mode != MARKER_ORIENT_ANGLE) {

tr = sp_shape_marker_get_transform_at_end(lastcurve);

} else {

tr = Geom::Rotate::from_degrees(marker->orient.computed) * Geom::Translate(lastcurve.pointAt(1));

}

sp_shape_render_invoke_marker_rendering(marker, tr, style, ctx);

}

}

}

static void sp_group_render(SPGroup *group, CairoRenderContext *ctx)

{

CairoRenderer *renderer = ctx->getRenderer();

TRACE(("sp_group_render opacity: %f\n", SP_SCALE24_TO_FLOAT(item->style->opacity.value)));

GSList *l = g_slist_reverse(group->childList(false));

while (l) {

SPObject *o = reinterpret_cast<SPObject *>(l->data);

SPItem *item = dynamic_cast<SPItem *>(o);

if (item) {

renderer->renderItem(ctx, item);

}

l = g_slist_remove (l, o);

}

}

static void sp_use_render(SPUse *use, CairoRenderContext *ctx)

{

bool translated = false;

CairoRenderer *renderer = ctx->getRenderer();

if ((use->x._set && use->x.computed != 0) || (use->y._set && use->y.computed != 0)) {

Geom::Affine tp(Geom::Translate(use->x.computed, use->y.computed));

ctx->pushState();

ctx->transform(tp);

translated = true;

}

if (use->child) {

renderer->renderItem(ctx, use->child);

}

if (translated) {

ctx->popState();

}

}

static void sp_text_render(SPText *text, CairoRenderContext *ctx)

{

text->layout.showGlyphs(ctx);

}

static void sp_flowtext_render(SPFlowtext *flowtext, CairoRenderContext *ctx)

{

flowtext->layout.showGlyphs(ctx);

}

static void sp_image_render(SPImage *image, CairoRenderContext *ctx)

{

if (!image->pixbuf) {

return;

}

if ((image->width.computed <= 0.0) || (image->height.computed <= 0.0)) {

return;

}

int w = image->pixbuf->width();

int h = image->pixbuf->height();

double x = image->x.computed;

double y = image->y.computed;

double width = image->width.computed;

double height = image->height.computed;

if (image->aspect_align != SP_ASPECT_NONE) {

calculatePreserveAspectRatio (image->aspect_align, image->aspect_clip, (double)w, (double)h,

&x, &y, &width, &height);

}

if (image->aspect_clip == SP_ASPECT_SLICE && !ctx->getCurrentState()->has_overflow) {

ctx->addClippingRect(image->x.computed, image->y.computed, image->width.computed, image->height.computed);

}

Geom::Translate tp(x, y);

Geom::Scale s(width / (double)w, height / (double)h);

Geom::Affine t(s * tp);

ctx->renderImage(image->pixbuf, t, image->style);

}

static void sp_symbol_render(SPSymbol *symbol, CairoRenderContext *ctx)

{

if (!symbol->cloned) {

return;

}

/* Cloned <symbol> is actually renderable */

ctx->pushState();

ctx->transform(symbol->c2p);

// apply viewbox if set

if (0 /*symbol->viewBox_set*/) {

Geom::Affine vb2user;

double x, y, width, height;

double view_width, view_height;

x = 0.0;

y = 0.0;

width = 1.0;

height = 1.0;

view_width = symbol->viewBox.width();

view_height = symbol->viewBox.height();

calculatePreserveAspectRatio(symbol->aspect_align, symbol->aspect_clip, view_width, view_height,

&x, &y,&width, &height);

// [itemTransform *] translate(x, y) * scale(w/vw, h/vh) * translate(-vx, -vy);

vb2user = Geom::identity();

vb2user[0] = width / view_width;

vb2user[3] = height / view_height;

vb2user[4] = x - symbol->viewBox.left() * vb2user[0];

vb2user[5] = y - symbol->viewBox.top() * vb2user[3];

ctx->transform(vb2user);

}

sp_group_render(symbol, ctx);

ctx->popState();

}

static void sp_root_render(SPRoot *root, CairoRenderContext *ctx)

{

CairoRenderer *renderer = ctx->getRenderer();

if (!ctx->getCurrentState()->has_overflow && root->parent)

ctx->addClippingRect(root->x.computed, root->y.computed, root->width.computed, root->height.computed);

ctx->pushState();

renderer->setStateForItem(ctx, root);

ctx->transform(root->c2p);

sp_group_render(root, ctx);

ctx->popState();

}

static void sp_asbitmap_render(SPItem *item, CairoRenderContext *ctx)

{

// The code was adapted from sp_selection_create_bitmap_copy in selection-chemistry.cpp

// Calculate resolution

double res;

/** @TODO reimplement the resolution stuff (WHY?)

res = ctx->getBitmapResolution();

if(res == 0) {

res = Inkscape::Util::Quantity::convert(1, "in", "px");

}

TRACE(("sp_asbitmap_render: resolution: %f\n", res ));

// Get the bounding box of the selection in desktop coordinates.

Geom::OptRect bbox = item->desktopVisualBounds();

// no bbox, e.g. empty group

if (!bbox) {

return;

}

Geom::Rect docrect(Geom::Rect(Geom::Point(0, 0), item->document->getDimensions()));

bbox &= docrect;

// no bbox, e.g. empty group

if (!bbox) {

return;

}

// The width and height of the bitmap in pixels

unsigned width = ceil(bbox->width() * Inkscape::Util::Quantity::convert(res, "px", "in"));

unsigned height = ceil(bbox->height() * Inkscape::Util::Quantity::convert(res, "px", "in"));

if (width == 0 || height == 0) return;

// Scale to exactly fit integer bitmap inside bounding box

double scale_x = bbox->width() / width;

double scale_y = bbox->height() / height;

// Location of bounding box in document coordinates.

double shift_x = bbox->min()[Geom::X];

double shift_y = bbox->max()[Geom::Y];

// For default 96 dpi, snap bitmap to pixel grid

if (res == Inkscape::Util::Quantity::convert(1, "in", "px")) {

shift_x = round (shift_x);

shift_y = -round (-shift_y); // Correct rounding despite coordinate inversion.

// Remove the negations when the inversion is gone.

}

// Calculate the matrix that will be applied to the image so that it exactly overlaps the source objects

// Matix to put bitmap in correct place on document

Geom::Affine t_on_document = (Geom::Affine)(Geom::Scale (scale_x, -scale_y)) *

(Geom::Affine)(Geom::Translate (shift_x, shift_y));

// ctx matrix already includes item transformation. We must substract.

Geom::Affine t_item = item->i2dt_affine ();

Geom::Affine t = t_on_document * t_item.inverse();

// Do the export

SPDocument *document = item->document;

GSList *items = NULL;

items = g_slist_append(items, item);

boost::scoped_ptr<Inkscape::Pixbuf> pb(

sp_generate_internal_bitmap(document, NULL,

bbox->min()[Geom::X], bbox->min()[Geom::Y], bbox->max()[Geom::X], bbox->max()[Geom::Y],

width, height, res, res, (guint32) 0xffffff00, items ));

if (pb) {

//TEST(gdk_pixbuf_save( pb, "bitmap.png", "png", NULL, NULL ));

ctx->renderImage(pb.get(), t, item->style);

}

g_slist_free (items);

}

static void sp_item_invoke_render(SPItem *item, CairoRenderContext *ctx)

{

// Check item's visibility

if (item->isHidden()) {

return;

}

SPStyle* style = item->style;

if((ctx->getFilterToBitmap() == TRUE) && (style->filter.set != 0)) {

return sp_asbitmap_render(item, ctx);

}

SPRoot *root = dynamic_cast<SPRoot *>(item);

if (root) {

TRACE(("root\n"));

sp_root_render(root, ctx);

} else {

SPSymbol *symbol = dynamic_cast<SPSymbol *>(item);

if (symbol) {

TRACE(("symbol\n"));

sp_symbol_render(symbol, ctx);

} else {

SPGroup *group = dynamic_cast<SPGroup *>(item);

if (group) {

TRACE(("group\n"));

sp_group_render(group, ctx);

} else {

SPShape *shape = dynamic_cast<SPShape *>(item);

if (shape) {

TRACE(("shape\n"));

sp_shape_render(shape, ctx);

} else {

SPUse *use = dynamic_cast<SPUse *>(item);

if (use) {

TRACE(("use begin---\n"));

sp_use_render(use, ctx);

TRACE(("---use end\n"));

} else {

SPText *text = dynamic_cast<SPText *>(item);

if (text) {

TRACE(("text\n"));

sp_text_render(text, ctx);

} else {

SPFlowtext *flowtext = dynamic_cast<SPFlowtext *>(item);

if (flowtext) {

TRACE(("flowtext\n"));

sp_flowtext_render(flowtext, ctx);

} else {

SPImage *image = dynamic_cast<SPImage *>(item);

if (image) {

TRACE(("image\n"));

sp_image_render(image, ctx);

}

}

}

}

}

}

}

}

}

CairoRenderer::setStateForItem(CairoRenderContext *ctx, SPItem const *item)

{

SPStyle const *style = item->style;

ctx->setStateForStyle(style);

CairoRenderState *state = ctx->getCurrentState();

state->clip_path = item->clip_ref->getObject();

state->mask = item->mask_ref->getObject();

state->item_transform = Geom::Affine (item->transform);

// If parent_has_userspace is true the parent state's transform

// has to be used for the mask's/clippath's context.

// This is so because we use the image's/(flow)text's transform for positioning

// instead of explicitly specifying it and letting the renderer do the

// transformation before rendering the item.

if (dynamic_cast<SPText const *>(item) || dynamic_cast<SPFlowtext const *>(item) || dynamic_cast<SPImage const *>(item)) {

state->parent_has_userspace = TRUE;

}

TRACE(("setStateForItem opacity: %f\n", state->opacity));

}

void CairoRenderer::renderItem(CairoRenderContext *ctx, SPItem *item)

{

ctx->pushState();

setStateForItem(ctx, item);

CairoRenderState *state = ctx->getCurrentState();

state->need_layer = ( state->mask || state->clip_path || state->opacity != 1.0 );

// Draw item on a temporary surface so a mask, clip-path, or opacity can be applied to it.

if (state->need_layer) {

state->merge_opacity = FALSE;

ctx->pushLayer();

}

ctx->transform(item->transform);

sp_item_invoke_render(item, ctx);

if (state->need_layer)

ctx->popLayer(); // This applies clipping/masking

ctx->popState();

}

void CairoRenderer::renderHatchPath(CairoRenderContext *ctx, SPHatchPath const &hatchPath, unsigned key) {

ctx->pushState();

ctx->setStateForStyle(hatchPath.style);

ctx->transform(Geom::Translate(hatchPath.offset.computed, 0));

SPCurve *curve = hatchPath.calculateRenderCurve(key);

Geom::PathVector const & pathv =curve->get_pathvector();

if (!pathv.empty()) {

ctx->renderPathVector(pathv, hatchPath.style, Geom::OptRect());

}

curve->unref();

ctx->popState();

}

CairoRenderer::setupDocument(CairoRenderContext *ctx, SPDocument *doc, bool pageBoundingBox, float bleedmargin_px, SPItem *base)

{

g_assert( ctx != NULL );

if (!base) {

base = doc->getRoot();

}

Geom::Rect d;

if (pageBoundingBox) {

d = Geom::Rect::from_xywh(Geom::Point(0,0), doc->getDimensions());

} else {

Geom::OptRect bbox = base->desktopVisualBounds();

if (!bbox) {

g_message("CairoRenderer: empty bounding box.");

return false;

}

d = *bbox;

}

d.expandBy(bleedmargin_px);

if (ctx->_vector_based_target) {

// convert from px to pt

d *= Geom::Scale(Inkscape::Util::Quantity::convert(1, "px", "pt"));

}

ctx->_width = d.width();

ctx->_height = d.height();

TRACE(("setupDocument: %f x %f\n", ctx->_width, ctx->_height));

bool ret = ctx->setupSurface(ctx->_width, ctx->_height);

if (ret) {

if (pageBoundingBox) {

// translate to set bleed/margin

Geom::Affine tp( Geom::Translate( bleedmargin_px, bleedmargin_px ) );

ctx->transform(tp);

} else {

double high = doc->getHeight().value("px");

if (ctx->_vector_based_target)

high = Inkscape::Util::Quantity::convert(high, "px", "pt");

// this transform translates the export drawing to a virtual page (0,0)-(width,height)

Geom::Affine tp(Geom::Translate(-d.left() * (ctx->_vector_based_target ? Inkscape::Util::Quantity::convert(1, "pt", "px") : 1.0),

(d.bottom() - high) * (ctx->_vector_based_target ? Inkscape::Util::Quantity::convert(1, "pt", "px") : 1.0)));

ctx->transform(tp);

}

}

return ret;

}

#include "macros.h" // SP_PRINT_*

CairoRenderer::applyClipPath(CairoRenderContext *ctx, SPClipPath const *cp)

{

g_assert( ctx != NULL && ctx->_is_valid );

if (cp == NULL)

return;

CairoRenderContext::CairoRenderMode saved_mode = ctx->getRenderMode();

ctx->setRenderMode(CairoRenderContext::RENDER_MODE_CLIP);

// FIXME: the access to the first clippath view to obtain the bbox is completely bogus

Geom::Affine saved_ctm;

if (cp->clipPathUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX && cp->display->bbox) {

//SP_PRINT_DRECT("clipd", cp->display->bbox);

Geom::Rect clip_bbox = *cp->display->bbox;

Geom::Affine t(Geom::Scale(clip_bbox.dimensions()));

t[4] = clip_bbox.left();

t[5] = clip_bbox.top();

t *= ctx->getCurrentState()->transform;

saved_ctm = ctx->getTransform();

ctx->setTransform(t);

}

TRACE(("BEGIN clip\n"));

SPObject const *co = cp;

for ( SPObject const *child = co->firstChild() ; child; child = child->getNext() ) {

SPItem const *item = dynamic_cast<SPItem const *>(child);

if (item) {

// combine transform of the item in clippath and the item using clippath:

Geom::Affine tempmat = item->transform * ctx->getCurrentState()->item_transform;

// render this item in clippath

ctx->pushState();

ctx->transform(tempmat);

setStateForItem(ctx, item);

// TODO fix this call to accept const items

sp_item_invoke_render(const_cast<SPItem *>(item), ctx);

ctx->popState();

}

}

TRACE(("END clip\n"));

// do clipping only if this was the first call to applyClipPath

if (ctx->getClipMode() == CairoRenderContext::CLIP_MODE_PATH

&& saved_mode == CairoRenderContext::RENDER_MODE_NORMAL)

cairo_clip(ctx->_cr);

if (cp->clipPathUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX)

ctx->setTransform(saved_ctm);

ctx->setRenderMode(saved_mode);

}

CairoRenderer::applyMask(CairoRenderContext *ctx, SPMask const *mask)

{

g_assert( ctx != NULL && ctx->_is_valid );

if (mask == NULL)

return;

// FIXME: the access to the first mask view to obtain the bbox is completely bogus

// TODO: should the bbox be transformed if maskUnits != userSpaceOnUse ?

if (mask->maskContentUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX && mask->display->bbox) {

//SP_PRINT_DRECT("maskd", &mask->display->bbox);

Geom::Rect mask_bbox = *mask->display->bbox;

Geom::Affine t(Geom::Scale(mask_bbox.dimensions()));

t[4] = mask_bbox.left();

t[5] = mask_bbox.top();

t *= ctx->getCurrentState()->transform;

ctx->setTransform(t);

}

// Clip mask contents... but...

// The mask's bounding box is the "geometric bounding box" which doesn't allow for

// filters which extend outside the bounding box. So don't clip.

// ctx->addClippingRect(mask_bbox.x0, mask_bbox.y0, mask_bbox.x1 - mask_bbox.x0, mask_bbox.y1 - mask_bbox.y0);

ctx->pushState();

TRACE(("BEGIN mask\n"));

SPObject const *co = mask;

for ( SPObject const *child = co->firstChild() ; child; child = child->getNext() ) {

SPItem const *item = dynamic_cast<SPItem const *>(child);

if (item) {

// TODO fix const correctness:

renderItem(ctx, const_cast<SPItem*>(item));

}

}

TRACE(("END mask\n"));

ctx->popState();

}

calculatePreserveAspectRatio(unsigned int aspect_align, unsigned int aspect_clip, double vp_width, double vp_height,

double *x, double *y, double *width, double *height)

{

if (aspect_align == SP_ASPECT_NONE)

return;

double scalex, scaley, scale;

double new_width, new_height;

scalex = *width / vp_width;

scaley = *height / vp_height;

scale = (aspect_clip == SP_ASPECT_MEET) ? MIN(scalex, scaley) : MAX(scalex, scaley);

new_width = vp_width * scale;

new_height = vp_height * scale;

/* Now place viewbox to requested position */

switch (aspect_align) {

case SP_ASPECT_XMIN_YMIN:

break;

case SP_ASPECT_XMID_YMIN:

*x -= 0.5 * (new_width - *width);

break;

case SP_ASPECT_XMAX_YMIN:

*x -= 1.0 * (new_width - *width);

break;

case SP_ASPECT_XMIN_YMID:

*y -= 0.5 * (new_height - *height);

break;

case SP_ASPECT_XMID_YMID:

*x -= 0.5 * (new_width - *width);

*y -= 0.5 * (new_height - *height);

break;

case SP_ASPECT_XMAX_YMID:

*x -= 1.0 * (new_width - *width);

*y -= 0.5 * (new_height - *height);

break;

case SP_ASPECT_XMIN_YMAX:

*y -= 1.0 * (new_height - *height);

break;

case SP_ASPECT_XMID_YMAX:

*x -= 0.5 * (new_width - *width);

*y -= 1.0 * (new_height - *height);

break;

case SP_ASPECT_XMAX_YMAX:

*x -= 1.0 * (new_width - *width);

*y -= 1.0 * (new_height - *height);

break;

default:

break;

}

*width = new_width;

*height = new_height;

}

#include "clear-n_.h"

} /* namespace Internal */

} /* namespace Extension */

} /* namespace Inkscape */

#undef TRACE