#define __SP_CAIRO_RENDER_CONTEXT_C__

#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 <2geom/pathvector.h>

#include <glib/gmem.h>

#include <glibmm/i18n.h>

#include "display/nr-arena.h"

#include "display/nr-arena-item.h"

#include "display/nr-arena-group.h"

#include "display/curve.h"

#include "display/canvas-bpath.h"

#include "display/inkscape-cairo.h"

#include "sp-item.h"

#include "sp-item-group.h"

#include "style.h"

#include "sp-linear-gradient.h"

#include "sp-radial-gradient.h"

#include "sp-pattern.h"

#include "sp-mask.h"

#include "sp-clippath.h"

#ifdef WIN32

#include "libnrtype/FontFactory.h" // USE_PANGO_WIN32

#endif

#include <unit-constants.h>

#include "cairo-render-context.h"

#include "cairo-renderer.h"

#include "extension/system.h"

#include "io/sys.h"

#include <cairo.h>

#ifdef CAIRO_HAS_PDF_SURFACE

#include <cairo-pdf.h>

#endif

#ifdef CAIRO_HAS_PS_SURFACE

#include <cairo-ps.h>

#endif

#ifdef CAIRO_HAS_FT_FONT

#include <cairo-ft.h>

#endif

#ifdef CAIRO_HAS_WIN32_FONT

#include <cairo-win32.h>

#include <pango/pangowin32.h>

#endif

#include <pango/pangofc-fontmap.h>

#define TRACE(_args)

#define TEST(_args)

struct SPClipPathView {

SPClipPathView *next;

unsigned int key;

NRArenaItem *arenaitem;

NRRect bbox;

};

struct SPMaskView {

SPMaskView *next;

unsigned int key;

NRArenaItem *arenaitem;

NRRect bbox;

};

namespace Inkscape {

namespace Extension {

namespace Internal {

static cairo_status_t _write_callback(void *closure, const unsigned char *data, unsigned int length);

CairoRenderContext::CairoRenderContext(CairoRenderer *parent) :

_dpi(72),

_pdf_level(0),

_ps_level(1),

_eps(false),

_is_texttopath(FALSE),

_is_filtertobitmap(FALSE),

_bitmapresolution(72),

_stream(NULL),

_is_valid(FALSE),

_vector_based_target(FALSE),

_cr(NULL), // Cairo context

_surface(NULL),

_target(CAIRO_SURFACE_TYPE_IMAGE),

_target_format(CAIRO_FORMAT_ARGB32),

_layout(NULL),

_state(NULL),

_renderer(parent),

_render_mode(RENDER_MODE_NORMAL),

_clip_mode(CLIP_MODE_MASK)

{}

CairoRenderContext::~CairoRenderContext(void)

{

if (_cr) cairo_destroy(_cr);

if (_surface) cairo_surface_destroy(_surface);

if (_layout) g_object_unref(_layout);

}

CairoRenderer*

CairoRenderContext::getRenderer(void) const

{

return _renderer;

}

CairoRenderState*

CairoRenderContext::getCurrentState(void) const

{

return _state;

}

CairoRenderState*

CairoRenderContext::getParentState(void) const

{

// if this is the root node just return it

if (g_slist_length(_state_stack) == 1) {

return _state;

} else {

return (CairoRenderState *)g_slist_nth_data(_state_stack, 1);

}

}

CairoRenderContext::setStateForStyle(SPStyle const *style)

{

// only opacity & overflow is stored for now

_state->opacity = SP_SCALE24_TO_FLOAT(style->opacity.value);

_state->has_overflow = (style->overflow.set && style->overflow.value != SP_CSS_OVERFLOW_VISIBLE);

_state->has_filtereffect = (style->filter.set != 0) ? TRUE : FALSE;

if (style->fill.isPaintserver() || style->stroke.isPaintserver())

_state->merge_opacity = FALSE;

// disable rendering of opacity if there's a stroke on the fill

if (_state->merge_opacity

&& !style->fill.isNone()

&& !style->stroke.isNone())

_state->merge_opacity = FALSE;

}

CairoRenderContext*

CairoRenderContext::cloneMe(double width, double height) const

{

g_assert( _is_valid );

g_assert( width > 0.0 && height > 0.0 );

CairoRenderContext *new_context = _renderer->createContext();

cairo_surface_t *surface = cairo_surface_create_similar(cairo_get_target(_cr), CAIRO_CONTENT_COLOR_ALPHA,

(int)ceil(width), (int)ceil(height));

new_context->_cr = cairo_create(surface);

new_context->_surface = surface;

new_context->_is_valid = TRUE;

return new_context;

}

CairoRenderContext*

CairoRenderContext::cloneMe(void) const

{

g_assert( _is_valid );

return cloneMe(_width, _height);

}

CairoRenderContext::setImageTarget(cairo_format_t format)

{

// format cannot be set on an already initialized surface

if (_is_valid)

return false;

switch (format) {

case CAIRO_FORMAT_ARGB32:

case CAIRO_FORMAT_RGB24:

case CAIRO_FORMAT_A8:

case CAIRO_FORMAT_A1:

_target_format = format;

_target = CAIRO_SURFACE_TYPE_IMAGE;

return true;

break;

default:

break;

}

return false;

}

CairoRenderContext::setPdfTarget(gchar const *utf8_fn)

{

#ifndef CAIRO_HAS_PDF_SURFACE

return false;

#else

_target = CAIRO_SURFACE_TYPE_PDF;

_vector_based_target = TRUE;

#endif

FILE *osf = NULL;

FILE *osp = NULL;

gsize bytesRead = 0;

gsize bytesWritten = 0;

GError *error = NULL;

gchar *local_fn = g_filename_from_utf8(utf8_fn,

-1, &bytesRead, &bytesWritten, &error);

gchar const *fn = local_fn;

/* TODO: Replace the below fprintf's with something that does the right thing whether in

if (fn != NULL) {

if (*fn == '|') {

fn += 1;

while (isspace(*fn)) fn += 1;

#ifndef WIN32

osp = popen(fn, "w");

#else

osp = _popen(fn, "w");

#endif

if (!osp) {

fprintf(stderr, "inkscape: popen(%s): %s\n",

fn, strerror(errno));

return false;

}

_stream = osp;

} else if (*fn == '>') {

fn += 1;

while (isspace(*fn)) fn += 1;

Inkscape::IO::dump_fopen_call(fn, "K");

osf = Inkscape::IO::fopen_utf8name(fn, "w+");

if (!osf) {

fprintf(stderr, "inkscape: fopen(%s): %s\n",

fn, strerror(errno));

return false;

}

_stream = osf;

} else {

/* put cwd stuff in here */

gchar *qn = ( *fn

? g_strdup_printf("lpr -P %s", fn) /* FIXME: quote fn */

: g_strdup("lpr") );

#ifndef WIN32

osp = popen(qn, "w");

#else

osp = _popen(qn, "w");

#endif

if (!osp) {

fprintf(stderr, "inkscape: popen(%s): %s\n",

qn, strerror(errno));

return false;

}

g_free(qn);

_stream = osp;

}

}

g_free(local_fn);

if (_stream) {

/* fixme: this is kinda icky */

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

(void) signal(SIGPIPE, SIG_IGN);

#endif

}

return true;

}

CairoRenderContext::setPsTarget(gchar const *utf8_fn)

{

#ifndef CAIRO_HAS_PS_SURFACE

return false;

#else

_target = CAIRO_SURFACE_TYPE_PS;

_vector_based_target = TRUE;

#endif

FILE *osf = NULL;

FILE *osp = NULL;

gsize bytesRead = 0;

gsize bytesWritten = 0;

GError *error = NULL;

gchar *local_fn = g_filename_from_utf8(utf8_fn,

-1, &bytesRead, &bytesWritten, &error);

gchar const *fn = local_fn;

/* TODO: Replace the below fprintf's with something that does the right thing whether in

if (fn != NULL) {

if (*fn == '|') {

fn += 1;

while (isspace(*fn)) fn += 1;

#ifndef WIN32

osp = popen(fn, "w");

#else

osp = _popen(fn, "w");

#endif

if (!osp) {

fprintf(stderr, "inkscape: popen(%s): %s\n",

fn, strerror(errno));

return false;

}

_stream = osp;

} else if (*fn == '>') {

fn += 1;

while (isspace(*fn)) fn += 1;

Inkscape::IO::dump_fopen_call(fn, "K");

osf = Inkscape::IO::fopen_utf8name(fn, "w+");

if (!osf) {

fprintf(stderr, "inkscape: fopen(%s): %s\n",

fn, strerror(errno));

return false;

}

_stream = osf;

} else {

/* put cwd stuff in here */

gchar *qn = ( *fn

? g_strdup_printf("lpr -P %s", fn) /* FIXME: quote fn */

: g_strdup("lpr") );

#ifndef WIN32

osp = popen(qn, "w");

#else

osp = _popen(qn, "w");

#endif

if (!osp) {

fprintf(stderr, "inkscape: popen(%s): %s\n",

qn, strerror(errno));

return false;

}

g_free(qn);

_stream = osp;

}

}

g_free(local_fn);

if (_stream) {

/* fixme: this is kinda icky */

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

(void) signal(SIGPIPE, SIG_IGN);

#endif

}

return true;

}

void CairoRenderContext::setPSLevel(unsigned int level)

{

_ps_level = level;

}

void CairoRenderContext::setEPS(bool eps)

{

_eps = eps;

}

unsigned int CairoRenderContext::getPSLevel(void)

{

return _ps_level;

}

void CairoRenderContext::setPDFLevel(unsigned int level)

{

_pdf_level = level;

}

void CairoRenderContext::setTextToPath(bool texttopath)

{

_is_texttopath = texttopath;

}

void CairoRenderContext::setFilterToBitmap(bool filtertobitmap)

{

_is_filtertobitmap = filtertobitmap;

}

bool CairoRenderContext::getFilterToBitmap(void)

{

return _is_filtertobitmap;

}

void CairoRenderContext::setBitmapResolution(int resolution)

{

_bitmapresolution = resolution;

}

int CairoRenderContext::getBitmapResolution(void)

{

return _bitmapresolution;

}

cairo_surface_t*

CairoRenderContext::getSurface(void)

{

g_assert( _is_valid );

return _surface;

}

CairoRenderContext::saveAsPng(const char *file_name)

{

cairo_status_t status = cairo_surface_write_to_png(_surface, file_name);

if (status)

return false;

else

return true;

}

CairoRenderContext::setRenderMode(CairoRenderMode mode)

{

switch (mode) {

case RENDER_MODE_NORMAL:

case RENDER_MODE_CLIP:

_render_mode = mode;

break;

default:

_render_mode = RENDER_MODE_NORMAL;

break;

}

}

CairoRenderContext::CairoRenderMode

CairoRenderContext::getRenderMode(void) const

{

return _render_mode;

}

CairoRenderContext::setClipMode(CairoClipMode mode)

{

switch (mode) {

case CLIP_MODE_PATH: // Clip is rendered as a path for vector output

case CLIP_MODE_MASK: // Clip is rendered as a bitmap for raster output.

_clip_mode = mode;

break;

default:

_clip_mode = CLIP_MODE_PATH;

break;

}

}

CairoRenderContext::CairoClipMode

CairoRenderContext::getClipMode(void) const

{

return _clip_mode;

}

CairoRenderState*

CairoRenderContext::_createState(void)

{

CairoRenderState *state = (CairoRenderState*)g_malloc(sizeof(CairoRenderState));

g_assert( state != NULL );

state->has_filtereffect = FALSE;

state->merge_opacity = TRUE;

state->opacity = 1.0;

state->need_layer = FALSE;

state->has_overflow = FALSE;

state->parent_has_userspace = FALSE;

state->clip_path = NULL;

state->mask = NULL;

return state;

}

CairoRenderContext::pushLayer(void)

{

g_assert( _is_valid );

TRACE(("--pushLayer\n"));

cairo_push_group(_cr);

// clear buffer

if (!_vector_based_target) {

cairo_save(_cr);

cairo_set_operator(_cr, CAIRO_OPERATOR_CLEAR);

cairo_paint(_cr);

cairo_restore(_cr);

}

}

CairoRenderContext::popLayer(void)

{

g_assert( _is_valid );

float opacity = _state->opacity;

TRACE(("--popLayer w/ opacity %f\n", opacity));

/*

SPClipPath *clip_path = _state->clip_path;

SPMask *mask = _state->mask;

if (clip_path || mask) {

CairoRenderContext *clip_ctx = 0;

cairo_surface_t *clip_mask = 0;

// Apply any clip path first

if (clip_path) {

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

if (_render_mode == RENDER_MODE_CLIP)

mask = NULL; // disable mask when performing nested clipping

if (_vector_based_target) {

setClipMode(CLIP_MODE_PATH); // Vector

if (!mask) {

cairo_pop_group_to_source(_cr);

_renderer->applyClipPath(this, clip_path); // Uses cairo_clip()

if (opacity == 1.0)

cairo_paint(_cr);

else

cairo_paint_with_alpha(_cr, opacity);

} else {

// the clipPath will be applied before masking

}

} else {

// setup a new rendering context

clip_ctx = _renderer->createContext();

clip_ctx->setImageTarget(CAIRO_FORMAT_A8);

clip_ctx->setClipMode(CLIP_MODE_MASK); // Raster

// This code ties the clipping to the document coordinates. It doesn't allow

// for a clipped object intially drawn off the page and then translated onto

// the page.

if (!clip_ctx->setupSurface(_width, _height)) {

TRACE(("clip: setupSurface failed\n"));

_renderer->destroyContext(clip_ctx);

return;

}

// clear buffer

cairo_save(clip_ctx->_cr);

cairo_set_operator(clip_ctx->_cr, CAIRO_OPERATOR_CLEAR);

cairo_paint(clip_ctx->_cr);

cairo_restore(clip_ctx->_cr);

// If a mask won't be applied set opacity too. (The clip is represented by a solid Cairo mask.)

if (!mask)

cairo_set_source_rgba(clip_ctx->_cr, 1.0, 1.0, 1.0, opacity);

else

cairo_set_source_rgba(clip_ctx->_cr, 1.0, 1.0, 1.0, 1.0);

// copy over the correct CTM

// It must be stored in item_transform of current state after pushState.

Geom::Matrix item_transform;

if (_state->parent_has_userspace)

item_transform = getParentState()->transform * _state->item_transform;

else

item_transform = _state->item_transform;

// apply the clip path

clip_ctx->pushState();

clip_ctx->getCurrentState()->item_transform = item_transform;

_renderer->applyClipPath(clip_ctx, clip_path);

clip_ctx->popState();

clip_mask = clip_ctx->getSurface();

TEST(clip_ctx->saveAsPng("clip_mask.png"));

if (!mask) {

cairo_pop_group_to_source(_cr);

cairo_mask_surface(_cr, clip_mask, 0, 0);

_renderer->destroyContext(clip_ctx);

}

}

}

// Apply any mask second

if (mask) {

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

// create rendering context for mask

CairoRenderContext *mask_ctx = _renderer->createContext();

// Fix Me: This is a kludge. PDF and PS output is set to 72 dpi but the

// Cairo surface is expecting the mask to be 90 dpi.

float surface_width = _width;

float surface_height = _height;

if( _vector_based_target ) {

surface_width *= 1.25;

surface_height *= 1.25;

}

mask_ctx->setupSurface( surface_width, surface_height );

TRACE(("mask surface: %f x %f at %i dpi\n", surface_width, surface_height, _dpi ));

// set rendering mode to normal

setRenderMode(RENDER_MODE_NORMAL);

// copy the correct CTM to mask context

/*

// This is probably not correct... but it seems to do the trick.

mask_ctx->setTransform(&_state->item_transform);

// render mask contents to mask_ctx

_renderer->applyMask(mask_ctx, mask);

TEST(mask_ctx->saveAsPng("mask.png"));

// composite with clip mask

if (clip_path && _clip_mode == CLIP_MODE_MASK) {

cairo_mask_surface(mask_ctx->_cr, clip_mask, 0, 0);

_renderer->destroyContext(clip_ctx);

}

cairo_surface_t *mask_image = mask_ctx->getSurface();

int width = cairo_image_surface_get_width(mask_image);

int height = cairo_image_surface_get_height(mask_image);

int stride = cairo_image_surface_get_stride(mask_image);

unsigned char *pixels = cairo_image_surface_get_data(mask_image);

// premultiply with opacity

// In SVG, the rgb channels as well as the alpha channel is used in masking.

// In Cairo, only the alpha channel is used thus requiring this conversion.

TRACE(("premul w/ %f\n", opacity));

guint8 int_opacity = (guint8)(255 * opacity);

for (int row = 0 ; row < height; row++) {

unsigned char *row_data = pixels + (row * stride);

for (int i = 0 ; i < width; i++) {

guint32 *pixel = (guint32 *)row_data + i;

*pixel = ((((*pixel & 0x00ff0000) >> 16) * 13817 +

((*pixel & 0x0000ff00) >> 8) * 46518 +

((*pixel & 0x000000ff) ) * 4688) *

int_opacity);

}

}

cairo_pop_group_to_source(_cr);

if (_clip_mode == CLIP_MODE_PATH) {

// we have to do the clipping after cairo_pop_group_to_source

_renderer->applyClipPath(this, clip_path);

}

// apply the mask onto the layer

cairo_mask_surface(_cr, mask_image, 0, 0);

_renderer->destroyContext(mask_ctx);

}

} else {

// No clip path or mask

cairo_pop_group_to_source(_cr);

if (opacity == 1.0)

cairo_paint(_cr);

else

cairo_paint_with_alpha(_cr, opacity);

}

}

CairoRenderContext::addClipPath(Geom::PathVector const &pv, SPIEnum const *fill_rule)

{

g_assert( _is_valid );

// here it should be checked whether the current clip winding changed

// so we could switch back to masked clipping

if (fill_rule->value == SP_WIND_RULE_EVENODD) {

cairo_set_fill_rule(_cr, CAIRO_FILL_RULE_EVEN_ODD);

} else {

cairo_set_fill_rule(_cr, CAIRO_FILL_RULE_WINDING);

}

addPathVector(pv);

}

CairoRenderContext::addClippingRect(double x, double y, double width, double height)

{

g_assert( _is_valid );

cairo_rectangle(_cr, x, y, width, height);

cairo_clip(_cr);

}

CairoRenderContext::setupSurface(double width, double height)

{

// Is the surface already set up?

if (_is_valid)

return true;

if (_vector_based_target && _stream == NULL)

return false;

cairo_surface_t *surface = NULL;

switch (_target) {

case CAIRO_SURFACE_TYPE_IMAGE:

surface = cairo_image_surface_create(_target_format, (int)ceil(width), (int)ceil(height));

break;

#ifdef CAIRO_HAS_PDF_SURFACE

case CAIRO_SURFACE_TYPE_PDF:

surface = cairo_pdf_surface_create_for_stream(Inkscape::Extension::Internal::_write_callback, _stream, width, height);

break;

#endif

#ifdef CAIRO_HAS_PS_SURFACE

case CAIRO_SURFACE_TYPE_PS:

surface = cairo_ps_surface_create_for_stream(Inkscape::Extension::Internal::_write_callback, _stream, width, height);

#if (CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 5, 2))

if(CAIRO_STATUS_SUCCESS != cairo_surface_status(surface)) {

return FALSE;

}

cairo_ps_surface_restrict_to_level (surface, (cairo_ps_level_t)_ps_level);

cairo_ps_surface_set_eps (surface, (cairo_bool_t) _eps);

#endif

break;

#endif

default:

return false;

break;

}

return _finishSurfaceSetup (surface);

}

CairoRenderContext::setSurfaceTarget(cairo_surface_t *surface, bool is_vector, cairo_matrix_t *ctm)

{

if (_is_valid || !surface)

return false;

_vector_based_target = is_vector;

bool ret = _finishSurfaceSetup (surface, ctm);

if (ret)

cairo_surface_reference (surface);

return ret;

}

CairoRenderContext::_finishSurfaceSetup(cairo_surface_t *surface, cairo_matrix_t *ctm)

{

if(surface == NULL) {

return FALSE;

}

if(CAIRO_STATUS_SUCCESS != cairo_surface_status(surface)) {

return FALSE;

}

_cr = cairo_create(surface);

if (ctm)

cairo_set_matrix(_cr, ctm);

_surface = surface;

if (_vector_based_target) {

cairo_scale(_cr, PT_PER_PX, PT_PER_PX);

} else if (cairo_surface_get_content(_surface) != CAIRO_CONTENT_ALPHA) {

// set background color on non-alpha surfaces

// TODO: bgcolor should be derived from SPDocument

cairo_set_source_rgb(_cr, 1.0, 1.0, 1.0);

cairo_rectangle(_cr, 0, 0, _width, _height);

cairo_fill(_cr);

}

_is_valid = TRUE;

return true;

}

CairoRenderContext::finish(void)

{

g_assert( _is_valid );

if (_vector_based_target)

cairo_show_page(_cr);

cairo_destroy(_cr);

cairo_surface_finish(_surface);

cairo_status_t status = cairo_surface_status(_surface);

cairo_surface_destroy(_surface);

_cr = NULL;

_surface = NULL;

if (_layout)

g_object_unref(_layout);

_is_valid = FALSE;

if (_vector_based_target && _stream) {

/* Flush stream to be sure. */

(void) fflush(_stream);

fclose(_stream);

_stream = NULL;

}

if (status == CAIRO_STATUS_SUCCESS)

return true;

else

return false;

}

CairoRenderContext::transform(Geom::Matrix const *transform)

{

g_assert( _is_valid );

cairo_matrix_t matrix;

_initCairoMatrix(&matrix, transform);

cairo_transform(_cr, &matrix);

// store new CTM

getTransform(&_state->transform);

}

CairoRenderContext::setTransform(Geom::Matrix const *transform)

{

g_assert( _is_valid );

cairo_matrix_t matrix;

_initCairoMatrix(&matrix, transform);

cairo_set_matrix(_cr, &matrix);

_state->transform = *transform;

}

CairoRenderContext::getTransform(Geom::Matrix *copy) const

{

g_assert( _is_valid );

cairo_matrix_t ctm;

cairo_get_matrix(_cr, &ctm);

(*copy)[0] = ctm.xx;

(*copy)[1] = ctm.yx;

(*copy)[2] = ctm.xy;

(*copy)[3] = ctm.yy;

(*copy)[4] = ctm.x0;

(*copy)[5] = ctm.y0;

}

CairoRenderContext::getParentTransform(Geom::Matrix *copy) const

{

g_assert( _is_valid );

CairoRenderState *parent_state = getParentState();

memcpy(copy, &parent_state->transform, sizeof(Geom::Matrix));

}

CairoRenderContext::pushState(void)

{

g_assert( _is_valid );

cairo_save(_cr);

CairoRenderState *new_state = _createState();

// copy current state's transform

new_state->transform = _state->transform;

_state_stack = g_slist_prepend(_state_stack, new_state);

_state = new_state;

}

CairoRenderContext::popState(void)

{

g_assert( _is_valid );

cairo_restore(_cr);

g_free(_state_stack->data);

_state_stack = g_slist_remove_link(_state_stack, _state_stack);

_state = (CairoRenderState*)_state_stack->data;

g_assert( g_slist_length(_state_stack) > 0 );

}

static bool pattern_hasItemChildren (SPPattern *pat)

{

for (SPObject *child = sp_object_first_child(SP_OBJECT(pat)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {

if (SP_IS_ITEM (child)) {

return true;

}

}

return false;

}

cairo_pattern_t*

CairoRenderContext::_createPatternPainter(SPPaintServer const *const paintserver, NRRect const *pbox)

{

g_assert( SP_IS_PATTERN(paintserver) );

SPPattern *pat = SP_PATTERN (paintserver);

Geom::Matrix ps2user, pcs2dev;

ps2user = Geom::identity();

pcs2dev = Geom::identity();

double x = pattern_x(pat);

double y = pattern_y(pat);

double width = pattern_width(pat);

double height = pattern_height(pat);

double bbox_width_scaler;

double bbox_height_scaler;

TRACE(("%f x %f pattern\n", width, height));

if (pbox && pattern_patternUnits(pat) == SP_PATTERN_UNITS_OBJECTBOUNDINGBOX) {

//Geom::Matrix bbox2user (pbox->x1 - pbox->x0, 0.0, 0.0, pbox->y1 - pbox->y0, pbox->x0, pbox->y0);

bbox_width_scaler = pbox->x1 - pbox->x0;

bbox_height_scaler = pbox->y1 - pbox->y0;

ps2user[4] = x * bbox_width_scaler + pbox->x0;

ps2user[5] = y * bbox_height_scaler + pbox->y0;

} else {

bbox_width_scaler = 1.0;

bbox_height_scaler = 1.0;

ps2user[4] = x;

ps2user[5] = y;

}

// apply pattern transformation

Geom::Matrix pattern_transform(pattern_patternTransform(pat));

ps2user *= pattern_transform;

Geom::Point ori (ps2user[4], ps2user[5]);

// create pattern contents coordinate system

if (pat->viewBox_set) {

NRRect *view_box = pattern_viewBox(pat);

double x, y, w, h;

double view_width, view_height;

x = 0;

y = 0;

w = width * bbox_width_scaler;

h = height * bbox_height_scaler;

view_width = view_box->x1 - view_box->x0;

view_height = view_box->y1 - view_box->y0;

//calculatePreserveAspectRatio(pat->aspect_align, pat->aspect_clip, view_width, view_height, &x, &y, &w, &h);

pcs2dev[0] = w / view_width;

pcs2dev[3] = h / view_height;

pcs2dev[4] = x - view_box->x0 * pcs2dev[0];

pcs2dev[5] = y - view_box->y0 * pcs2dev[3];

} else if (pbox && pattern_patternContentUnits(pat) == SP_PATTERN_UNITS_OBJECTBOUNDINGBOX) {

pcs2dev[0] = pbox->x1 - pbox->x0;

pcs2dev[3] = pbox->y1 - pbox->y0;

}

// Calculate the size of the surface which has to be created

#define SUBPIX_SCALE 100

// Cairo requires an integer pattern surface width/height.

// Subtract 0.5 to prevent small rounding errors from increasing pattern size by one pixel.

// Multiply by SUBPIX_SCALE to allow for less than a pixel precision

double surface_width = MAX(ceil(SUBPIX_SCALE * bbox_width_scaler * width - 0.5), 1);

double surface_height = MAX(ceil(SUBPIX_SCALE * bbox_height_scaler * height - 0.5), 1);

TRACE(("pattern surface size: %f x %f\n", surface_width, surface_height));

// create new rendering context

CairoRenderContext *pattern_ctx = cloneMe(surface_width, surface_height);

// adjust the size of the painted pattern to fit exactly the created surface

// this has to be done because of the rounding to obtain an integer pattern surface width/height

double scale_width = surface_width / (bbox_width_scaler * width);

double scale_height = surface_height / (bbox_height_scaler * height);

if (scale_width != 1.0 || scale_height != 1.0 || _vector_based_target) {

TRACE(("needed to scale with %f %f\n", scale_width, scale_height));

pcs2dev *= Geom::Scale(SUBPIX_SCALE,SUBPIX_SCALE);

ps2user *= Geom::Scale(1.0/SUBPIX_SCALE,1.0/SUBPIX_SCALE);

}

// despite scaling up/down by subpixel scaler, the origin point of the pattern must be the same

ps2user[4] = ori[Geom::X];

ps2user[5] = ori[Geom::Y];

pattern_ctx->setTransform(&pcs2dev);

pattern_ctx->pushState();

// create arena and group

NRArena *arena = NRArena::create();

unsigned dkey = sp_item_display_key_new(1);

// show items and render them

for (SPPattern *pat_i = pat; pat_i != NULL; pat_i = pat_i->ref ? pat_i->ref->getObject() : NULL) {

if (pat_i && SP_IS_OBJECT (pat_i) && pattern_hasItemChildren(pat_i)) { // find the first one with item children

for (SPObject *child = sp_object_first_child(SP_OBJECT(pat_i)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {

if (SP_IS_ITEM (child)) {

sp_item_invoke_show (SP_ITEM (child), arena, dkey, SP_ITEM_REFERENCE_FLAGS);

_renderer->renderItem(pattern_ctx, SP_ITEM (child));

}

}

break; // do not go further up the chain if children are found

}

}

pattern_ctx->popState();

// setup a cairo_pattern_t

cairo_surface_t *pattern_surface = pattern_ctx->getSurface();

TEST(pattern_ctx->saveAsPng("pattern.png"));

cairo_pattern_t *result = cairo_pattern_create_for_surface(pattern_surface);

cairo_pattern_set_extend(result, CAIRO_EXTEND_REPEAT);

// set pattern transformation

cairo_matrix_t pattern_matrix;

_initCairoMatrix(&pattern_matrix, &ps2user);

cairo_matrix_invert(&pattern_matrix);

cairo_pattern_set_matrix(result, &pattern_matrix);

delete pattern_ctx;

// hide all items

for (SPPattern *pat_i = pat; pat_i != NULL; pat_i = pat_i->ref ? pat_i->ref->getObject() : NULL) {

if (pat_i && SP_IS_OBJECT (pat_i) && pattern_hasItemChildren(pat_i)) { // find the first one with item children

for (SPObject *child = sp_object_first_child(SP_OBJECT(pat_i)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {

if (SP_IS_ITEM (child)) {

sp_item_invoke_hide (SP_ITEM (child), dkey);

}

}

break; // do not go further up the chain if children are found

}

}

return result;

}

cairo_pattern_t*

CairoRenderContext::_createPatternForPaintServer(SPPaintServer const *const paintserver,

NRRect const *pbox, float alpha)

{

cairo_pattern_t *pattern = NULL;

bool apply_bbox2user = FALSE;

if (SP_IS_LINEARGRADIENT (paintserver)) {

SPLinearGradient *lg=SP_LINEARGRADIENT(paintserver);

sp_gradient_ensure_vector(SP_GRADIENT(lg)); // when exporting from commandline, vector is not built

Geom::Point p1 (lg->x1.computed, lg->y1.computed);

Geom::Point p2 (lg->x2.computed, lg->y2.computed);

if (pbox && SP_GRADIENT(lg)->units == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX) {

// convert to userspace

Geom::Matrix bbox2user(pbox->x1 - pbox->x0, 0, 0, pbox->y1 - pbox->y0, pbox->x0, pbox->y0);

p1 *= bbox2user;

p2 *= bbox2user;

}

// create linear gradient pattern

pattern = cairo_pattern_create_linear(p1[Geom::X], p1[Geom::Y], p2[Geom::X], p2[Geom::Y]);

// add stops

for (gint i = 0; unsigned(i) < lg->vector.stops.size(); i++) {

float rgb[3];

sp_color_get_rgb_floatv(&lg->vector.stops[i].color, rgb);

cairo_pattern_add_color_stop_rgba(pattern, lg->vector.stops[i].offset, rgb[0], rgb[1], rgb[2], lg->vector.stops[i].opacity * alpha);

}

} else if (SP_IS_RADIALGRADIENT (paintserver)) {

SPRadialGradient *rg=SP_RADIALGRADIENT(paintserver);

sp_gradient_ensure_vector(SP_GRADIENT(rg)); // when exporting from commandline, vector is not built

Geom::Point c (rg->cx.computed, rg->cy.computed);

Geom::Point f (rg->fx.computed, rg->fy.computed);

double r = rg->r.computed;

if (pbox && SP_GRADIENT(rg)->units == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX)

apply_bbox2user = true;

// create radial gradient pattern

pattern = cairo_pattern_create_radial(f[Geom::X], f[Geom::Y], 0, c[Geom::X], c[Geom::Y], r);

// add stops

for (gint i = 0; unsigned(i) < rg->vector.stops.size(); i++) {

float rgb[3];

sp_color_get_rgb_floatv(&rg->vector.stops[i].color, rgb);

cairo_pattern_add_color_stop_rgba(pattern, rg->vector.stops[i].offset, rgb[0], rgb[1], rgb[2], rg->vector.stops[i].opacity * alpha);

}

} else if (SP_IS_PATTERN (paintserver)) {

pattern = _createPatternPainter(paintserver, pbox);

} else {

return NULL;

}

if (pattern && SP_IS_GRADIENT (paintserver)) {

SPGradient *g = SP_GRADIENT(paintserver);

// set extend type

SPGradientSpread spread = sp_gradient_get_spread(g);

switch (spread) {

case SP_GRADIENT_SPREAD_REPEAT: {

cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);

break;

}

case SP_GRADIENT_SPREAD_REFLECT: { // not supported by cairo-pdf yet

cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REFLECT);

break;

}

case SP_GRADIENT_SPREAD_PAD: { // not supported by cairo-pdf yet

cairo_pattern_set_extend(pattern, CAIRO_EXTEND_PAD);

break;

}

default: {

cairo_pattern_set_extend(pattern, CAIRO_EXTEND_NONE);

break;

}

}

cairo_matrix_t pattern_matrix;

if (g->gradientTransform_set) {

// apply gradient transformation

cairo_matrix_init(&pattern_matrix,

g->gradientTransform[0], g->gradientTransform[1],

g->gradientTransform[2], g->gradientTransform[3],

g->gradientTransform[4], g->gradientTransform[5]);

} else {

cairo_matrix_init_identity (&pattern_matrix);

}

if (apply_bbox2user) {

// convert to userspace

cairo_matrix_t bbox2user;

cairo_matrix_init (&bbox2user, pbox->x1 - pbox->x0, 0, 0, pbox->y1 - pbox->y0, pbox->x0, pbox->y0);

cairo_matrix_multiply (&pattern_matrix, &bbox2user, &pattern_matrix);

}

cairo_matrix_invert(&pattern_matrix); // because Cairo expects a userspace->patternspace matrix

cairo_pattern_set_matrix(pattern, &pattern_matrix);

}

return pattern;

}

CairoRenderContext::_setFillStyle(SPStyle const *const style, NRRect const *pbox)

{

g_return_if_fail( style->fill.isColor()

|| style->fill.isPaintserver() );

float alpha = SP_SCALE24_TO_FLOAT(style->fill_opacity.value);

if (_state->merge_opacity) {

alpha *= _state->opacity;

TRACE(("merged op=%f\n", alpha));

}

if (style->fill.isColor()) {

float rgb[3];

sp_color_get_rgb_floatv(&style->fill.value.color, rgb);

cairo_set_source_rgba(_cr, rgb[0], rgb[1], rgb[2], alpha);

} else {

g_assert( style->fill.isPaintserver()

|| SP_IS_GRADIENT(SP_STYLE_FILL_SERVER(style))

|| SP_IS_PATTERN(SP_STYLE_FILL_SERVER(style)) );

cairo_pattern_t *pattern = _createPatternForPaintServer(SP_STYLE_FILL_SERVER(style), pbox, alpha);

if (pattern) {

cairo_set_source(_cr, pattern);

cairo_pattern_destroy(pattern);

}

}

}

CairoRenderContext::_setStrokeStyle(SPStyle const *style, NRRect const *pbox)

{

float alpha = SP_SCALE24_TO_FLOAT(style->stroke_opacity.value);

if (_state->merge_opacity)

alpha *= _state->opacity;

if (style->stroke.isColor()) {

float rgb[3];

sp_color_get_rgb_floatv(&style->stroke.value.color, rgb);

cairo_set_source_rgba(_cr, rgb[0], rgb[1], rgb[2], alpha);

} else {

g_assert( style->fill.isPaintserver()

|| SP_IS_GRADIENT(SP_STYLE_STROKE_SERVER(style))

|| SP_IS_PATTERN(SP_STYLE_STROKE_SERVER(style)) );

cairo_pattern_t *pattern = _createPatternForPaintServer(SP_STYLE_STROKE_SERVER(style), pbox, alpha);

if (pattern) {

cairo_set_source(_cr, pattern);

cairo_pattern_destroy(pattern);

}

}

if (style->stroke_dash.n_dash &&

style->stroke_dash.dash )

{

cairo_set_dash(_cr, style->stroke_dash.dash, style->stroke_dash.n_dash, style->stroke_dash.offset);

} else {

cairo_set_dash(_cr, NULL, 0, 0.0); // disable dashing

}

cairo_set_line_width(_cr, style->stroke_width.computed);

// set line join type

cairo_line_join_t join = CAIRO_LINE_JOIN_MITER;

switch (style->stroke_linejoin.computed) {

case SP_STROKE_LINEJOIN_MITER:

join = CAIRO_LINE_JOIN_MITER;

break;

case SP_STROKE_LINEJOIN_ROUND:

join = CAIRO_LINE_JOIN_ROUND;

break;

case SP_STROKE_LINEJOIN_BEVEL:

join = CAIRO_LINE_JOIN_BEVEL;

break;

}

cairo_set_line_join(_cr, join);

// set line cap type

cairo_line_cap_t cap = CAIRO_LINE_CAP_BUTT;

switch (style->stroke_linecap.computed) {

case SP_STROKE_LINECAP_BUTT:

cap = CAIRO_LINE_CAP_BUTT;

break;

case SP_STROKE_LINECAP_ROUND:

cap = CAIRO_LINE_CAP_ROUND;

break;

case SP_STROKE_LINECAP_SQUARE:

cap = CAIRO_LINE_CAP_SQUARE;

break;

}

cairo_set_line_cap(_cr, cap);

cairo_set_miter_limit(_cr, MAX(1, style->stroke_miterlimit.value));

}

CairoRenderContext::renderPathVector(Geom::PathVector const & pathv, SPStyle const *style, NRRect const *pbox)

{

g_assert( _is_valid );

if (_render_mode == RENDER_MODE_CLIP) {

if (_clip_mode == CLIP_MODE_PATH) {

addClipPath(pathv, &style->fill_rule);

} else {

setPathVector(pathv);

if (style->fill_rule.value == SP_WIND_RULE_EVENODD) {

cairo_set_fill_rule(_cr, CAIRO_FILL_RULE_EVEN_ODD);

} else {

cairo_set_fill_rule(_cr, CAIRO_FILL_RULE_WINDING);

}

cairo_fill(_cr);

TEST(cairo_surface_write_to_png (_surface, "pathmask.png"));

}

return true;

}

bool no_fill = style->fill.isNone() || style->fill_opacity.value == 0;

bool no_stroke = style->stroke.isNone() || style->stroke_width.computed < 1e-9 ||

style->fill_opacity.value == 0;

if (no_fill && no_stroke)

return true;

bool need_layer = ( !_state->merge_opacity && !_state->need_layer &&

( _state->opacity != 1.0 || _state->clip_path != NULL || _state->mask != NULL ) );

if (!need_layer)

cairo_save(_cr);

else

pushLayer();

if (!no_fill) {

_setFillStyle(style, pbox);

setPathVector(pathv);

if (style->fill_rule.value == SP_WIND_RULE_EVENODD) {

cairo_set_fill_rule(_cr, CAIRO_FILL_RULE_EVEN_ODD);

} else {

cairo_set_fill_rule(_cr, CAIRO_FILL_RULE_WINDING);

}

if (no_stroke)

cairo_fill(_cr);

else

cairo_fill_preserve(_cr);

}

if (!no_stroke) {

_setStrokeStyle(style, pbox);

if (no_fill)

setPathVector(pathv);

cairo_stroke(_cr);

}

if (need_layer)

popLayer();

else

cairo_restore(_cr);

return true;

}

CairoRenderContext::renderImage(guchar *px, unsigned int w, unsigned int h, unsigned int rs,

Geom::Matrix const *image_transform, SPStyle const *style)

{

g_assert( _is_valid );

if (_render_mode == RENDER_MODE_CLIP)

return true;

guchar* px_rgba = (guchar*)g_malloc(4 * w * h);

if (!px_rgba)

return false;

float opacity;

if (_state->merge_opacity)

opacity = _state->opacity;

else

opacity = 1.0;

// make a copy of the original pixbuf with premultiplied alpha

// if we pass the original pixbuf it will get messed up

for (unsigned i = 0; i < h; i++) {

for (unsigned j = 0; j < w; j++) {

guchar const *src = px + i * rs + j * 4;

guint32 *dst = (guint32 *)(px_rgba + i * rs + j * 4);

guchar r, g, b, alpha_dst;

// calculate opacity-modified alpha

alpha_dst = src[3];

if (opacity != 1.0 && _vector_based_target)

alpha_dst = (guchar)ceil((float)alpha_dst * opacity);

// premul alpha (needed because this will be undone by cairo-pdf)

r = src[0]*alpha_dst/255;

g = src[1]*alpha_dst/255;

b = src[2]*alpha_dst/255;

*dst = (((alpha_dst) << 24) | (((r)) << 16) | (((g)) << 8) | (b));

}

}

cairo_surface_t *image_surface = cairo_image_surface_create_for_data(px_rgba, CAIRO_FORMAT_ARGB32, w, h, w * 4);

if (cairo_surface_status(image_surface)) {

TRACE(("Image surface creation failed:\n%s\n", cairo_status_to_string(cairo_surface_status(image_surface))));

return false;

}

// setup automatic freeing of the image data when destroying the surface

static cairo_user_data_key_t key;

cairo_surface_set_user_data(image_surface, &key, px_rgba, (cairo_destroy_func_t)g_free);

cairo_save(_cr);

// scaling by width & height is not needed because it will be done by Cairo

if (image_transform)

transform(image_transform);

cairo_set_source_surface(_cr, image_surface, 0.0, 0.0);

// set clip region so that the pattern will not be repeated (bug in Cairo-PDF)

if (_vector_based_target) {

cairo_new_path(_cr);

cairo_rectangle(_cr, 0, 0, w, h);

cairo_clip(_cr);

}

if (_vector_based_target)

cairo_paint(_cr);

else

cairo_paint_with_alpha(_cr, opacity);

cairo_restore(_cr);

cairo_surface_destroy(image_surface);

return true;

}

#define GLYPH_ARRAY_SIZE 64

unsigned int

CairoRenderContext::_showGlyphs(cairo_t *cr, PangoFont *font, std::vector<CairoGlyphInfo> const &glyphtext, bool is_stroke)

{

cairo_glyph_t glyph_array[GLYPH_ARRAY_SIZE];

cairo_glyph_t *glyphs = glyph_array;

unsigned int num_glyphs = glyphtext.size();

if (num_glyphs > GLYPH_ARRAY_SIZE)

glyphs = (cairo_glyph_t*)g_malloc(sizeof(cairo_glyph_t) * num_glyphs);

unsigned int num_invalid_glyphs = 0;

unsigned int i = 0;

for (std::vector<CairoGlyphInfo>::const_iterator it_info = glyphtext.begin() ; it_info != glyphtext.end() ; it_info++) {

// skip glyphs which are PANGO_GLYPH_EMPTY (0x0FFFFFFF)

// or have the PANGO_GLYPH_UNKNOWN_FLAG (0x10000000) set

if (it_info->index == 0x0FFFFFFF || it_info->index & 0x10000000) {

TRACE(("INVALID GLYPH found\n"));

num_invalid_glyphs++;

continue;

}

glyphs[i - num_invalid_glyphs].index = it_info->index;

glyphs[i - num_invalid_glyphs].x = it_info->x;

glyphs[i - num_invalid_glyphs].y = it_info->y;

i++;

}

if (is_stroke || _is_texttopath)

cairo_glyph_path(cr, glyphs, num_glyphs - num_invalid_glyphs);

else

cairo_show_glyphs(cr, glyphs, num_glyphs - num_invalid_glyphs);

if (num_glyphs > GLYPH_ARRAY_SIZE)

g_free(glyphs);

return num_glyphs - num_invalid_glyphs;

}

CairoRenderContext::renderGlyphtext(PangoFont *font, Geom::Matrix const *font_matrix,

std::vector<CairoGlyphInfo> const &glyphtext, SPStyle const *style)

{

// create a cairo_font_face from PangoFont

double size = style->font_size.computed;

cairo_font_face_t *font_face = NULL;

FcPattern *fc_pattern = NULL;

#ifdef USE_PANGO_WIN32

# ifdef CAIRO_HAS_WIN32_FONT

LOGFONTA *lfa = pango_win32_font_logfont(font);

LOGFONTW lfw;

ZeroMemory(&lfw, sizeof(LOGFONTW));

memcpy(&lfw, lfa, sizeof(LOGFONTA));

MultiByteToWideChar(CP_OEMCP, MB_PRECOMPOSED, lfa->lfFaceName, LF_FACESIZE, lfw.lfFaceName, LF_FACESIZE);

font_face = cairo_win32_font_face_create_for_logfontw(&lfw);

# endif

#else

# ifdef CAIRO_HAS_FT_FONT

PangoFcFont *fc_font = PANGO_FC_FONT(font);

fc_pattern = fc_font->font_pattern;

font_face = cairo_ft_font_face_create_for_pattern(fc_pattern);

# endif

#endif

cairo_save(_cr);

cairo_set_font_face(_cr, font_face);

if (fc_pattern && FcPatternGetDouble(fc_pattern, FC_PIXEL_SIZE, 0, &size) != FcResultMatch)

size = 12.0;

// set the given font matrix

cairo_matrix_t matrix;

_initCairoMatrix(&matrix, font_matrix);

cairo_set_font_matrix(_cr, &matrix);

if (_render_mode == RENDER_MODE_CLIP) {

if (_clip_mode == CLIP_MODE_MASK) {

if (style->fill_rule.value == SP_WIND_RULE_EVENODD) {

cairo_set_fill_rule(_cr, CAIRO_FILL_RULE_EVEN_ODD);

} else {

cairo_set_fill_rule(_cr, CAIRO_FILL_RULE_WINDING);

}

_showGlyphs(_cr, font, glyphtext, FALSE);

} else {

// just add the glyph paths to the current context

_showGlyphs(_cr, font, glyphtext, TRUE);

}

} else {

if (style->fill.isColor() || style->fill.isPaintserver()) {

// set fill style

_setFillStyle(style, NULL);

_showGlyphs(_cr, font, glyphtext, FALSE);

}

if (style->stroke.isColor() || style->stroke.isPaintserver()) {

// set stroke style

_setStrokeStyle(style, NULL);

// paint stroke

_showGlyphs(_cr, font, glyphtext, TRUE);

cairo_stroke(_cr);

}

}

cairo_restore(_cr);

if (font_face)

cairo_font_face_destroy(font_face);

return true;

}

CairoRenderContext::setPathVector(Geom::PathVector const &pv)

{

cairo_new_path(_cr);

addPathVector(pv);

}

CairoRenderContext::addPathVector(Geom::PathVector const &pv)

{

feed_pathvector_to_cairo(_cr, pv);

}

CairoRenderContext::_concatTransform(cairo_t *cr, double xx, double yx, double xy, double yy, double x0, double y0)

{

cairo_matrix_t matrix;

cairo_matrix_init(&matrix, xx, yx, xy, yy, x0, y0);

cairo_transform(cr, &matrix);

}

CairoRenderContext::_initCairoMatrix(cairo_matrix_t *matrix, Geom::Matrix const *transform)

{

matrix->xx = (*transform)[0];

matrix->yx = (*transform)[1];

matrix->xy = (*transform)[2];

matrix->yy = (*transform)[3];

matrix->x0 = (*transform)[4];

matrix->y0 = (*transform)[5];

}

CairoRenderContext::_concatTransform(cairo_t *cr, Geom::Matrix const *transform)

{

_concatTransform(cr, (*transform)[0], (*transform)[1],

(*transform)[2], (*transform)[3],

(*transform)[4], (*transform)[5]);

}

static cairo_status_t

_write_callback(void *closure, const unsigned char *data, unsigned int length)

{

size_t written;

FILE *file = (FILE*)closure;

written = fwrite (data, 1, length, file);

if (written == length)

return CAIRO_STATUS_SUCCESS;

else

return CAIRO_STATUS_WRITE_ERROR;

}

#include "clear-n_.h"

} /* namespace Internal */

} /* namespace Extension */

} /* namespace Inkscape */

#undef TRACE

#undef TEST