mapserver/mapagg.cpp at master · select-8/mapserver · GitHub

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/******************************************************************************

* $Id$

* Project: MapServer

* Purpose: AGG rendering and other AGG related functions.

* Author: Thomas Bonfort and the MapServer team.

******************************************************************************

* Permission is hereby granted, free of charge, to any person obtaining a

* copy of this software and associated documentation files (the "Software"),

* to deal in the Software without restriction, including without limitation

* the rights to use, copy, modify, merge, publish, distribute, sublicense,

* and/or sell copies of the Software, and to permit persons to whom the

* Software is furnished to do so, subject to the following conditions:

* The above copyright notice and this permission notice shall be included in

* all copies of this Software or works derived from this Software.

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

* DEALINGS IN THE SOFTWARE.

*****************************************************************************/

#include "mapserver.h"

#include "fontcache.h"

#include "mapagg.h"

#include <assert.h>

#include "renderers/agg/include/agg_color_rgba.h"

#include "renderers/agg/include/agg_pixfmt_rgba.h"

#include "renderers/agg/include/agg_renderer_base.h"

#include "renderers/agg/include/agg_renderer_scanline.h"

#include "renderers/agg/include/agg_math_stroke.h"

#include "renderers/agg/include/agg_scanline_p.h"

#include "renderers/agg/include/agg_scanline_u.h"

#include "renderers/agg/include/agg_rasterizer_scanline_aa.h"

#include "renderers/agg/include/agg_span_pattern_rgba.h"

#include "renderers/agg/include/agg_span_allocator.h"

#include "renderers/agg/include/agg_span_interpolator_linear.h"

#include "renderers/agg/include/agg_pattern_filters_rgba.h"

#include "renderers/agg/include/agg_image_accessors.h"

#include "renderers/agg/include/agg_conv_stroke.h"

#include "renderers/agg/include/agg_conv_dash.h"

#include "renderers/agg/include/agg_font_freetype.h"

#include "renderers/agg/include/agg_conv_contour.h"

#include "renderers/agg/include/agg_ellipse.h"

#include "renderers/agg/include/agg_gamma_functions.h"

#include "renderers/agg/include/agg_blur.h"

#include "renderers/agg/include/agg_rasterizer_outline_aa.h"

#include "renderers/agg/include/agg_renderer_outline_aa.h"

#include "renderers/agg/include/agg_renderer_outline_image.h"

#include "renderers/agg/include/agg_span_pattern_rgba.h"

#include "renderers/agg/include/agg_span_image_filter_rgba.h"

#include "renderers/agg/include/agg_glyph_raster_bin.h"

#include "renderers/agg/include/agg_renderer_raster_text.h"

#include "renderers/agg/include/agg_path_storage_integer.h"

#include "renderers/agg/include/agg_conv_clipper.h"

#ifdef USE_PIXMAN

#include <pixman.h>

#endif

#include <memory>

#include <new>

#include <vector>

typedef mapserver::order_bgra band_order;

#define AGG_LINESPACE 1.33

typedef mapserver::int8u band_type;

typedef mapserver::rgba8 color_type;

typedef mapserver::pixel32_type pixel_type;

typedef mapserver::blender_rgba_pre<color_type, band_order> blender_pre;

typedef mapserver::comp_op_adaptor_rgba_pre<color_type, band_order> compop_blender_pre;

typedef mapserver::pixfmt_alpha_blend_rgba<blender_pre, mapserver::rendering_buffer, pixel_type> pixel_format;

typedef mapserver::pixfmt_custom_blend_rgba<compop_blender_pre, mapserver::rendering_buffer> compop_pixel_format;

typedef mapserver::rendering_buffer rendering_buffer;

typedef mapserver::renderer_base<pixel_format> renderer_base;

typedef mapserver::renderer_base<compop_pixel_format> compop_renderer_base;

typedef mapserver::renderer_scanline_aa_solid<renderer_base> renderer_scanline;

typedef mapserver::renderer_scanline_bin_solid<renderer_base> renderer_scanline_aliased;

typedef mapserver::rasterizer_scanline_aa<> rasterizer_scanline;

typedef mapserver::font_engine_freetype_int16 font_engine_type;

typedef mapserver::font_cache_manager<font_engine_type> font_manager_type;

typedef mapserver::conv_curve<font_manager_type::path_adaptor_type> font_curve_type;

typedef mapserver::glyph_raster_bin<color_type> glyph_gen;

static color_type AGG_NO_COLOR = color_type(0, 0, 0, 0);

#define aggColor(c) mapserver::rgba8_pre((c)->red, (c)->green, (c)->blue, (c)->alpha)

class aggRendererCache

{

public:

font_engine_type m_feng;

font_manager_type m_fman;

aggRendererCache(): m_fman(m_feng) {}

};

class AGG2Renderer

{

public:

std::vector<band_type> buffer{};

rendering_buffer m_rendering_buffer;

pixel_format m_pixel_format;

compop_pixel_format m_compop_pixel_format;

renderer_base m_renderer_base;

compop_renderer_base m_compop_renderer_base;

renderer_scanline m_renderer_scanline;

renderer_scanline_aliased m_renderer_scanline_aliased;

rasterizer_scanline m_rasterizer_aa;

rasterizer_scanline m_rasterizer_aa_gamma;

mapserver::scanline_p8 sl_poly; /*packed scanlines, works faster when the area is larger

than the perimeter, in number of pixels*/

mapserver::scanline_u8 sl_line; /*unpacked scanlines, works faster if the area is roughly

equal to the perimeter, in number of pixels*/

bool use_alpha = false;

std::unique_ptr<mapserver::conv_stroke<line_adaptor>> stroke{};

std::unique_ptr<mapserver::conv_dash<line_adaptor>> dash{};

std::unique_ptr<mapserver::conv_stroke<mapserver::conv_dash<line_adaptor> >> stroke_dash{};

double default_gamma = 0.0;

mapserver::gamma_linear gamma_function;

};

#define AGG_RENDERER(image) ((AGG2Renderer*) (image)->img.plugin)

template<class VertexSource>

static void applyCJC(VertexSource &stroke, int caps, int joins)

{

switch (joins) {

case MS_CJC_ROUND:

stroke.line_join(mapserver::round_join);

break;

case MS_CJC_MITER:

stroke.line_join(mapserver::miter_join);

break;

case MS_CJC_BEVEL:

case MS_CJC_NONE:

stroke.line_join(mapserver::bevel_join);

break;

}

switch (caps) {

case MS_CJC_BUTT:

case MS_CJC_NONE:

stroke.line_cap(mapserver::butt_cap);

break;

case MS_CJC_ROUND:

stroke.line_cap(mapserver::round_cap);

break;

case MS_CJC_SQUARE:

stroke.line_cap(mapserver::square_cap);

break;

}

int agg2RenderLine(imageObj *img, shapeObj *p, strokeStyleObj *style)

{

AGG2Renderer *r = AGG_RENDERER(img);

line_adaptor lines = line_adaptor(p);

r->m_rasterizer_aa.reset();

r->m_rasterizer_aa.filling_rule(mapserver::fill_non_zero);

if (style->antialiased== MS_FALSE)

{

r->m_renderer_scanline_aliased.color(aggColor(style->color));

}

else

{

r->m_renderer_scanline.color(aggColor(style->color));

}

if (style->patternlength <= 0) {

if(!r->stroke) {

r->stroke.reset(new mapserver::conv_stroke<line_adaptor>(lines));

} else {

r->stroke->attach(lines);

}

r->stroke->width(style->width);

if(style->width>1) {

applyCJC(*r->stroke, style->linecap, style->linejoin);

} else {

r->stroke->inner_join(mapserver::inner_bevel);

r->stroke->line_join(mapserver::bevel_join);

}

r->m_rasterizer_aa.add_path(*r->stroke);

} else {

if(!r->dash) {

r->dash.reset(new mapserver::conv_dash<line_adaptor>(lines));

} else {

r->dash->remove_all_dashes();

r->dash->dash_start(0.0);

r->dash->attach(lines);

}

if(!r->stroke_dash) {

r->stroke_dash.reset(new mapserver::conv_stroke<mapserver::conv_dash<line_adaptor> > (*r->dash));

} else {

r->stroke_dash->attach(*r->dash);

}

int patt_length = 0;

for (int i = 0; i < style->patternlength; i += 2) {

if (i < style->patternlength - 1) {

r->dash->add_dash(MS_MAX(1,MS_NINT(style->pattern[i])),

MS_MAX(1,MS_NINT(style->pattern[i + 1])));

if(style->patternoffset) {

patt_length += MS_MAX(1,MS_NINT(style->pattern[i])) +

MS_MAX(1,MS_NINT(style->pattern[i + 1]));

}

if(style->patternoffset > 0) {

r->dash->dash_start(patt_length - style->patternoffset);

}

r->stroke_dash->width(style->width);

if(style->width>1) {

applyCJC(*r->stroke_dash, style->linecap, style->linejoin);

} else {

r->stroke_dash->inner_join(mapserver::inner_bevel);

r->stroke_dash->line_join(mapserver::bevel_join);

}

r->m_rasterizer_aa.add_path(*r->stroke_dash);

}

if (style->antialiased == MS_FALSE)

mapserver::render_scanlines(r->m_rasterizer_aa, r->sl_line, r->m_renderer_scanline_aliased);

else

mapserver::render_scanlines(r->m_rasterizer_aa, r->sl_line, r->m_renderer_scanline);

return MS_SUCCESS;

}

int agg2RenderLineTiled(imageObj *img, shapeObj *p, imageObj * tile)

{

mapserver::pattern_filter_bilinear_rgba8 fltr;

typedef mapserver::line_image_pattern<mapserver::pattern_filter_bilinear_rgba8> pattern_type;

typedef mapserver::renderer_outline_image<renderer_base, pattern_type> renderer_img_type;

typedef mapserver::rasterizer_outline_aa<renderer_img_type, mapserver::line_coord_sat> rasterizer_img_type;

pattern_type patt(fltr);

AGG2Renderer *r = AGG_RENDERER(img);

AGG2Renderer *tileRenderer = AGG_RENDERER(tile);

line_adaptor lines(p);

patt.create(tileRenderer->m_pixel_format);

renderer_img_type ren_img(r->m_renderer_base, patt);

rasterizer_img_type ras_img(ren_img);

ras_img.add_path(lines);

return MS_SUCCESS;

}

int agg2RenderPolygon(imageObj *img, shapeObj *p, colorObj * color)

{

AGG2Renderer *r = AGG_RENDERER(img);

polygon_adaptor polygons(p);

r->m_rasterizer_aa_gamma.reset();

r->m_rasterizer_aa_gamma.filling_rule(mapserver::fill_even_odd);

r->m_rasterizer_aa_gamma.add_path(polygons);

r->m_renderer_scanline.color(aggColor(color));

mapserver::render_scanlines(r->m_rasterizer_aa_gamma, r->sl_poly, r->m_renderer_scanline);

return MS_SUCCESS;

}

static inline double int26p6_to_dbl(int p)

{

return double(p) / 64.0;

}

template<class PathStorage>

bool decompose_ft_outline(const FT_Outline& outline,

bool flip_y,

const mapserver::trans_affine& mtx,

PathStorage& path)

{

double x1, y1, x2, y2, x3, y3;

FT_Vector* point;

FT_Vector* limit;

char* tags;

int n; // index of contour in outline

int first; // index of first point in contour

char tag; // current point's state

first = 0;

for(n = 0; n < outline.n_contours; n++)

{

int last; // index of last point in contour

last = outline.contours[n];

limit = outline.points + last;

FT_Vector v_start = outline.points[first];

FT_Vector v_control = v_start;

point = outline.points + first;

tags = outline.tags + first;

tag = FT_CURVE_TAG(tags[0]);

// A contour cannot start with a cubic control point!

if(tag == FT_CURVE_TAG_CUBIC) return false;

// check first point to determine origin

if( tag == FT_CURVE_TAG_CONIC)

{

const FT_Vector v_last = outline.points[last];

// first point is conic control. Yes, this happens.

if(FT_CURVE_TAG(outline.tags[last]) == FT_CURVE_TAG_ON)

{

// start at last point if it is on the curve

v_start = v_last;

limit--;

}

else

{

// if both first and last points are conic,

// start at their middle and record its position

// for closure

v_start.x = (v_start.x + v_last.x) / 2;

v_start.y = (v_start.y + v_last.y) / 2;

}

point--;

tags--;

}

x1 = int26p6_to_dbl(v_start.x);

y1 = int26p6_to_dbl(v_start.y);

if(flip_y) y1 = -y1;

mtx.transform(&x1, &y1);

path.move_to(x1,y1);

while(point < limit)

{

point++;

tags++;

tag = FT_CURVE_TAG(tags[0]);

switch(tag)

{

case FT_CURVE_TAG_ON: // emit a single line_to

{

x1 = int26p6_to_dbl(point->x);

y1 = int26p6_to_dbl(point->y);

if(flip_y) y1 = -y1;

mtx.transform(&x1, &y1);

path.line_to(x1,y1);

//path.line_to(conv(point->x), flip_y ? -conv(point->y) : conv(point->y));

continue;

}

case FT_CURVE_TAG_CONIC: // consume conic arcs

{

v_control.x = point->x;

v_control.y = point->y;

Do_Conic:

if(point < limit)

{

FT_Vector vec;

FT_Vector v_middle;

point++;

tags++;

tag = FT_CURVE_TAG(tags[0]);

vec.x = point->x;

vec.y = point->y;

if(tag == FT_CURVE_TAG_ON)

{

x1 = int26p6_to_dbl(v_control.x);

y1 = int26p6_to_dbl(v_control.y);

x2 = int26p6_to_dbl(vec.x);

y2 = int26p6_to_dbl(vec.y);

if(flip_y) { y1 = -y1; y2 = -y2; }

mtx.transform(&x1, &y1);

mtx.transform(&x2, &y2);

path.curve3(x1,y1,x2,y2);

continue;

}

if(tag != FT_CURVE_TAG_CONIC) return false;

v_middle.x = (v_control.x + vec.x) / 2;

v_middle.y = (v_control.y + vec.y) / 2;

x1 = int26p6_to_dbl(v_control.x);

y1 = int26p6_to_dbl(v_control.y);

x2 = int26p6_to_dbl(v_middle.x);

y2 = int26p6_to_dbl(v_middle.y);

if(flip_y) { y1 = -y1; y2 = -y2; }

mtx.transform(&x1, &y1);

mtx.transform(&x2, &y2);

path.curve3(x1,y1,x2,y2);

//path.curve3(conv(v_control.x),

// flip_y ? -conv(v_control.y) : conv(v_control.y),

// conv(v_middle.x),

// flip_y ? -conv(v_middle.y) : conv(v_middle.y));

v_control = vec;

goto Do_Conic;

}

x1 = int26p6_to_dbl(v_control.x);

y1 = int26p6_to_dbl(v_control.y);

x2 = int26p6_to_dbl(v_start.x);

y2 = int26p6_to_dbl(v_start.y);

if(flip_y) { y1 = -y1; y2 = -y2; }

mtx.transform(&x1, &y1);

mtx.transform(&x2, &y2);

path.curve3(x1,y1,x2,y2);

//path.curve3(conv(v_control.x),

// flip_y ? -conv(v_control.y) : conv(v_control.y),

// conv(v_start.x),

// flip_y ? -conv(v_start.y) : conv(v_start.y));

goto Close;

}

default: // FT_CURVE_TAG_CUBIC

{

FT_Vector vec1, vec2;

if(point + 1 > limit || FT_CURVE_TAG(tags[1]) != FT_CURVE_TAG_CUBIC)

{

return false;

}

vec1.x = point[0].x;

vec1.y = point[0].y;

vec2.x = point[1].x;

vec2.y = point[1].y;

point += 2;

tags += 2;

if(point <= limit)

{

FT_Vector vec;

vec.x = point->x;

vec.y = point->y;

x1 = int26p6_to_dbl(vec1.x);

y1 = int26p6_to_dbl(vec1.y);

x2 = int26p6_to_dbl(vec2.x);

y2 = int26p6_to_dbl(vec2.y);

x3 = int26p6_to_dbl(vec.x);

y3 = int26p6_to_dbl(vec.y);

if(flip_y) { y1 = -y1; y2 = -y2; y3 = -y3; }

mtx.transform(&x1, &y1);

mtx.transform(&x2, &y2);

mtx.transform(&x3, &y3);

path.curve4(x1,y1,x2,y2,x3,y3);

//path.curve4(conv(vec1.x),

// flip_y ? -conv(vec1.y) : conv(vec1.y),

// conv(vec2.x),

// flip_y ? -conv(vec2.y) : conv(vec2.y),

// conv(vec.x),

// flip_y ? -conv(vec.y) : conv(vec.y));

continue;

}

x1 = int26p6_to_dbl(vec1.x);

y1 = int26p6_to_dbl(vec1.y);

x2 = int26p6_to_dbl(vec2.x);

y2 = int26p6_to_dbl(vec2.y);

x3 = int26p6_to_dbl(v_start.x);

y3 = int26p6_to_dbl(v_start.y);

if(flip_y) { y1 = -y1; y2 = -y2; y3 = -y3; }

mtx.transform(&x1, &y1);

mtx.transform(&x2, &y2);

mtx.transform(&x3, &y3);

path.curve4(x1,y1,x2,y2,x3,y3);

//path.curve4(conv(vec1.x),

// flip_y ? -conv(vec1.y) : conv(vec1.y),

// conv(vec2.x),

// flip_y ? -conv(vec2.y) : conv(vec2.y),

// conv(v_start.x),

// flip_y ? -conv(v_start.y) : conv(v_start.y));

goto Close;

}

path.close_polygon();

Close:

first = last + 1;

}

return true;

}

int agg2RenderPolygonTiled(imageObj *img, shapeObj *p, imageObj * tile)

{

assert(img->format->renderer == tile->format->renderer);

AGG2Renderer *r = AGG_RENDERER(img);

AGG2Renderer *tileRenderer = AGG_RENDERER(tile);

polygon_adaptor polygons(p);

typedef mapserver::wrap_mode_repeat wrap_type;

typedef mapserver::image_accessor_wrap<pixel_format,wrap_type,wrap_type> img_source_type;

typedef mapserver::span_pattern_rgba<img_source_type> span_gen_type;

mapserver::span_allocator<mapserver::rgba8> sa;

r->m_rasterizer_aa.reset();

r->m_rasterizer_aa.filling_rule(mapserver::fill_even_odd);

img_source_type img_src(tileRenderer->m_pixel_format);

span_gen_type sg(img_src, 0, 0);

r->m_rasterizer_aa.add_path(polygons);

mapserver::render_scanlines_aa(r->m_rasterizer_aa, r->sl_poly, r->m_renderer_base, sa , sg);

return MS_SUCCESS;

}

int agg2RenderGlyphsPath(imageObj *img, const textSymbolObj *ts, colorObj *c, colorObj *oc, int ow, int /*isMarker*/) {

const textPathObj *tp = ts->textpath;

mapserver::path_storage glyphs;

mapserver::trans_affine trans;

AGG2Renderer *r = AGG_RENDERER(img);

r->m_rasterizer_aa.filling_rule(mapserver::fill_non_zero);

for(int i=0; i<tp->numglyphs; i++) {

glyphObj *gl = tp->glyphs + i;

trans.reset();

trans.rotate(-gl->rot);

trans.translate(gl->pnt.x, gl->pnt.y);

outline_element *ol = msGetGlyphOutline(gl->face,gl->glyph);

if(!ol) {

return MS_FAILURE;

}

decompose_ft_outline(ol->outline,true,trans,glyphs);

}

mapserver::conv_curve<mapserver::path_storage> m_curves(glyphs);

if (oc) {

r->m_rasterizer_aa.reset();

r->m_rasterizer_aa.filling_rule(mapserver::fill_non_zero);

mapserver::conv_contour<mapserver::conv_curve<mapserver::path_storage> > cc(m_curves);

cc.width(ow + 1);

r->m_rasterizer_aa.add_path(cc);

r->m_renderer_scanline.color(aggColor(oc));

mapserver::render_scanlines(r->m_rasterizer_aa, r->sl_line, r->m_renderer_scanline);

}

if(c) {

r->m_rasterizer_aa.reset();

r->m_rasterizer_aa.filling_rule(mapserver::fill_non_zero);

r->m_rasterizer_aa.add_path(m_curves);

r->m_renderer_scanline.color(aggColor(c));

mapserver::render_scanlines(r->m_rasterizer_aa, r->sl_line, r->m_renderer_scanline);

}

return MS_SUCCESS;

}

mapserver::path_storage imageVectorSymbol(symbolObj *symbol)

{

mapserver::path_storage path;

int is_new=1;

for(int i=0; i < symbol->numpoints; i++) {

if((symbol->points[i].x == -99) && (symbol->points[i].y == -99))

is_new=1;

else {

if(is_new) {

path.move_to(symbol->points[i].x,symbol->points[i].y);

is_new=0;

} else {

path.line_to(symbol->points[i].x,symbol->points[i].y);

}

return path;

}

int agg2RenderVectorSymbol(imageObj *img, double x, double y,

symbolObj *symbol, symbolStyleObj * style)

{

AGG2Renderer *r = AGG_RENDERER(img);

double ox = symbol->sizex * 0.5;

double oy = symbol->sizey * 0.5;

mapserver::path_storage path = imageVectorSymbol(symbol);

mapserver::trans_affine mtx;

mtx *= mapserver::trans_affine_translation(-ox,-oy);

mtx *= mapserver::trans_affine_scaling(style->scale);

mtx *= mapserver::trans_affine_rotation(-style->rotation);

mtx *= mapserver::trans_affine_translation(x, y);

path.transform(mtx);

if (style->color) {

r->m_rasterizer_aa.reset();

r->m_rasterizer_aa.filling_rule(mapserver::fill_even_odd);

r->m_rasterizer_aa.add_path(path);

r->m_renderer_scanline.color(aggColor(style->color));

mapserver::render_scanlines(r->m_rasterizer_aa, r->sl_poly, r->m_renderer_scanline);

}

if(style->outlinecolor) {

r->m_rasterizer_aa.reset();

r->m_rasterizer_aa.filling_rule(mapserver::fill_non_zero);

r->m_renderer_scanline.color(aggColor(style->outlinecolor));

mapserver::conv_stroke<mapserver::path_storage> stroke(path);

stroke.width(style->outlinewidth);

r->m_rasterizer_aa.add_path(stroke);

mapserver::render_scanlines(r->m_rasterizer_aa, r->sl_poly, r->m_renderer_scanline);

}

return MS_SUCCESS;

}

int agg2RenderPixmapSymbol(imageObj *img, double x, double y, symbolObj *symbol, symbolStyleObj * style)

{

AGG2Renderer *r = AGG_RENDERER(img);

rasterBufferObj *pixmap = symbol->pixmap_buffer;

assert(pixmap->type == MS_BUFFER_BYTE_RGBA);

rendering_buffer b(pixmap->data.rgba.pixels,pixmap->width,pixmap->height,pixmap->data.rgba.row_step);

pixel_format pf(b);

r->m_rasterizer_aa.reset();

r->m_rasterizer_aa.filling_rule(mapserver::fill_non_zero);

if ( (style->rotation != 0 && style->rotation != MS_PI*2.)|| style->scale != 1) {

mapserver::trans_affine image_mtx;

image_mtx *= mapserver::trans_affine_translation(-(pf.width()/2.),-(pf.height()/2.));

/*agg angles are antitrigonometric*/

image_mtx *= mapserver::trans_affine_rotation(-style->rotation);

image_mtx *= mapserver::trans_affine_scaling(style->scale);

image_mtx *= mapserver::trans_affine_translation(x,y);

image_mtx.invert();

typedef mapserver::span_interpolator_linear<> interpolator_type;

interpolator_type interpolator(image_mtx);

mapserver::span_allocator<color_type> sa;

// "hardcoded" bilinear filter

//------------------------------------------

typedef mapserver::span_image_filter_rgba_bilinear_clip<pixel_format, interpolator_type> span_gen_type;

span_gen_type sg(pf, mapserver::rgba(0,0,0,0), interpolator);

mapserver::path_storage pixmap_bbox;

int ims_2 = MS_NINT(MS_MAX(pixmap->width,pixmap->height)*style->scale*1.415)/2+1;

pixmap_bbox.move_to(x-ims_2,y-ims_2);

pixmap_bbox.line_to(x+ims_2,y-ims_2);

pixmap_bbox.line_to(x+ims_2,y+ims_2);

pixmap_bbox.line_to(x-ims_2,y+ims_2);

r->m_rasterizer_aa.add_path(pixmap_bbox);

mapserver::render_scanlines_aa(r->m_rasterizer_aa, r->sl_poly, r->m_renderer_base, sa, sg);

} else {

//just copy the image at the correct location (we place the pixmap on

//the nearest integer pixel to avoid blurring)

r->m_renderer_base.blend_from(pf,0,MS_NINT(x-pixmap->width/2.),MS_NINT(y-pixmap->height/2.));

}

return MS_SUCCESS;

}

int agg2RenderEllipseSymbol(imageObj *image, double x, double y,

symbolObj *symbol, symbolStyleObj * style)

{

AGG2Renderer *r = AGG_RENDERER(image);

mapserver::path_storage path;

mapserver::ellipse ellipse(x,y,symbol->sizex*style->scale/2,symbol->sizey*style->scale/2);

path.concat_path(ellipse);

if( style->rotation != 0) {

mapserver::trans_affine mtx;

mtx *= mapserver::trans_affine_translation(-x,-y);

/*agg angles are antitrigonometric*/

mtx *= mapserver::trans_affine_rotation(-style->rotation);

mtx *= mapserver::trans_affine_translation(x,y);

path.transform(mtx);

}

if(style->color) {

r->m_rasterizer_aa.reset();

r->m_rasterizer_aa.filling_rule(mapserver::fill_even_odd);

r->m_rasterizer_aa.add_path(path);

r->m_renderer_scanline.color(aggColor(style->color));

mapserver::render_scanlines(r->m_rasterizer_aa, r->sl_line, r->m_renderer_scanline);

}

if(style->outlinewidth) {

r->m_rasterizer_aa.reset();

r->m_rasterizer_aa.filling_rule(mapserver::fill_non_zero);

mapserver::conv_stroke<mapserver::path_storage> stroke(path);

stroke.width(style->outlinewidth);

r->m_rasterizer_aa.add_path(stroke);

r->m_renderer_scanline.color(aggColor(style->outlinecolor));

mapserver::render_scanlines(r->m_rasterizer_aa, r->sl_poly, r->m_renderer_scanline);

}

return MS_SUCCESS;

}

int agg2RenderTile(imageObj * /*img*/, imageObj * /*tile*/, double /*x*/, double /*y*/)

{

AGG2Renderer *imgRenderer = agg2GetRenderer(img);

AGG2Renderer *tileRenderer = agg2GetRenderer(tile);

return MS_FAILURE;

}

int aggInitializeRasterBuffer(rasterBufferObj *rb, int width, int height, int mode)

{

rb->type = MS_BUFFER_BYTE_RGBA;

rb->data.rgba.pixel_step = 4;

rb->data.rgba.row_step = rb->data.rgba.pixel_step * width;

rb->width = width;

rb->height = height;

int nBytes = rb->data.rgba.row_step * height;

rb->data.rgba.pixels = (band_type*)msSmallCalloc(nBytes,sizeof(band_type));

rb->data.rgba.r = &(rb->data.rgba.pixels[band_order::R]);

rb->data.rgba.g = &(rb->data.rgba.pixels[band_order::G]);

rb->data.rgba.b = &(rb->data.rgba.pixels[band_order::B]);

if(mode == MS_IMAGEMODE_RGBA) {

rb->data.rgba.a = &(rb->data.rgba.pixels[band_order::A]);

}

return MS_SUCCESS;

}

int aggGetRasterBufferHandle(imageObj *img, rasterBufferObj * rb)

{

AGG2Renderer *r = AGG_RENDERER(img);

rb->type =MS_BUFFER_BYTE_RGBA;

rb->data.rgba.pixels = r->buffer.data();

rb->data.rgba.row_step = r->m_rendering_buffer.stride();

rb->data.rgba.pixel_step = 4;

rb->width = r->m_rendering_buffer.width();

rb->height = r->m_rendering_buffer.height();

rb->data.rgba.r = &(r->buffer[band_order::R]);

rb->data.rgba.g = &(r->buffer[band_order::G]);

rb->data.rgba.b = &(r->buffer[band_order::B]);

if(r->use_alpha)

rb->data.rgba.a = &(r->buffer[band_order::A]);

else

rb->data.rgba.a = NULL;

return MS_SUCCESS;

}

int aggGetRasterBufferCopy(imageObj *img, rasterBufferObj *rb)

{

AGG2Renderer *r = AGG_RENDERER(img);

aggInitializeRasterBuffer(rb, img->width, img->height, MS_IMAGEMODE_RGBA);

int nBytes = r->m_rendering_buffer.stride()*r->m_rendering_buffer.height();

memcpy(rb->data.rgba.pixels,r->buffer.data(), nBytes);

return MS_SUCCESS;

}

int agg2MergeRasterBuffer(imageObj *dest, rasterBufferObj *overlay, double opacity, int srcX, int srcY,

int dstX, int dstY, int width, int height)

{

assert(overlay->type == MS_BUFFER_BYTE_RGBA);

rendering_buffer b(overlay->data.rgba.pixels, overlay->width, overlay->height, overlay->data.rgba.row_step);

pixel_format pf(b);

AGG2Renderer *r = AGG_RENDERER(dest);

mapserver::rect_base<int> src_rect(srcX,srcY,srcX+width,srcY+height);

r->m_renderer_base.blend_from(pf,&src_rect, dstX-srcX, dstY-srcY, unsigned(opacity * 255));

return MS_SUCCESS;

}

/* image i/o */

imageObj *agg2CreateImage(int width, int height, outputFormatObj *format, colorObj * bg)

{

imageObj *image = NULL;

if (format->imagemode != MS_IMAGEMODE_RGB && format->imagemode != MS_IMAGEMODE_RGBA) {

msSetError(MS_MISCERR,

"AGG2 driver only supports RGB or RGBA pixel models.", "agg2CreateImage()");

return image;

}

image = (imageObj *) calloc(1, sizeof (imageObj));

MS_CHECK_ALLOC(image, sizeof (imageObj), NULL);

AGG2Renderer *r = new AGG2Renderer();

/* Compute size on 64bit and check that it is compatible of the platform size_t */

AGG_INT64U bufSize64 = (AGG_INT64U)width * height * 4 * sizeof(band_type);

size_t bufSize = (size_t)bufSize64;

if( (AGG_INT64U)bufSize != bufSize64 ) {

msSetError(MS_MEMERR, "%s: %d: Out of memory allocating " AGG_INT64U_FRMT " bytes.\n", "agg2CreateImage()",

__FILE__, __LINE__, bufSize64);

free(image);

delete r;

return NULL;

}

try

{

r->buffer.resize(bufSize / sizeof(band_type));

}

catch( const std::bad_alloc& ) {

msSetError(MS_MEMERR, "%s: %d: Out of memory allocating " AGG_INT64U_FRMT " bytes.\n", "agg2CreateImage()",

__FILE__, __LINE__, bufSize64);

free(image);

delete r;

return NULL;

}

r->m_rendering_buffer.attach(r->buffer.data(), width, height, width * 4);

r->m_pixel_format.attach(r->m_rendering_buffer);

r->m_compop_pixel_format.attach(r->m_rendering_buffer);

r->m_renderer_base.attach(r->m_pixel_format);

r->m_compop_renderer_base.attach(r->m_compop_pixel_format);

r->m_renderer_scanline.attach(r->m_renderer_base);

r->m_renderer_scanline_aliased.attach(r->m_renderer_base);

r->default_gamma = atof(msGetOutputFormatOption( format, "GAMMA", "0.75" ));

if(r->default_gamma <= 0.0 || r->default_gamma >= 1.0) {

r->default_gamma = 0.75;

}

r->gamma_function.set(0,r->default_gamma);

r->m_rasterizer_aa_gamma.gamma(r->gamma_function);

if( bg && !format->transparent )

r->m_renderer_base.clear(aggColor(bg));

else

r->m_renderer_base.clear(AGG_NO_COLOR);

if (!bg || format->transparent || format->imagemode == MS_IMAGEMODE_RGBA ) {

r->use_alpha = true;

} else {

r->use_alpha = false;

}

image->img.plugin = (void*) r;

return image;

}

int agg2SaveImage(imageObj * /*img*/, mapObj* /*map*/, FILE * /*fp*/, outputFormatObj * /*format*/)

{

return MS_FAILURE;

}

int agg2StartNewLayer(imageObj *img, mapObj* /*map*/, layerObj *layer)

{

AGG2Renderer *r = AGG_RENDERER(img);

const char *sgamma = msLayerGetProcessingKey( layer, "GAMMA" );

double gamma;

if(sgamma) {

gamma = atof(sgamma);

if(gamma <= 0 || gamma >= 1) gamma = 0.75;

} else {

gamma = r->default_gamma;

}

if(r->gamma_function.end() != gamma) {

r->gamma_function.end(gamma);

r->m_rasterizer_aa_gamma.gamma(r->gamma_function);

}

return MS_SUCCESS;

}

int agg2CloseNewLayer(imageObj * /*img*/, mapObj * /*map*/, layerObj * /*layer*/)

{

return MS_SUCCESS;

}

int agg2FreeImage(imageObj * image)

{

AGG2Renderer *r = AGG_RENDERER(image);

delete r;

image->img.plugin = NULL;

return MS_SUCCESS;

}

int agg2FreeSymbol(symbolObj * /*symbol*/)

{

return MS_SUCCESS;

}

int agg2InitCache(void **vcache)

{

aggRendererCache *cache = new aggRendererCache();

*vcache = (void*)cache;

return MS_SUCCESS;

}

int agg2Cleanup(void *vcache)

{

aggRendererCache *cache = (aggRendererCache*)vcache;

delete cache;

return MS_SUCCESS;

}

// ------------------------------------------------------------------------

// Function to create a custom hatch symbol based on an arbitrary angle.

// ------------------------------------------------------------------------

static mapserver::path_storage createHatch(double ox, double oy,

double rx, double ry,

int sx, int sy, double angle, double step)

{

mapserver::path_storage path;

//restrict the angle to [0 180[, i.e ]-pi/2,pi/2] in radians

angle = fmod(angle, 360.0);

if(angle < 0) angle += 360;

if(angle >= 180) angle -= 180;

//treat 2 easy cases which would cause divide by 0 in generic case

if(angle==0) {

double y0 = step-fmod(oy-ry,step);

if((oy - ry) < 0) {

y0 -= step;

}

for(double y=y0; y<sy; y+=step) {

path.move_to(0,y);

path.line_to(sx,y);

}

return path;

}

if(angle==90) {

double x0 = step-fmod(ox-rx,step);

if((ox - rx) < 0) {

x0 -= step;

}

for(double x=x0; x<sx; x+=step) {

path.move_to(x,0);

path.line_to(x,sy);

}

return path;

}

double theta = (90-angle)*MS_DEG_TO_RAD; /* theta in ]-pi/2 , pi/2] */

double ct = cos(theta);

double st = sin(theta);

double invct = 1.0/ct;

double invst = 1.0/st;

double r0; /* distance from first hatch line to the top-left (if angle in 0,pi/2)

or bottom-left (if angle in -pi/2,0) corner of the hatch bbox */

double rmax = sqrt((double)(sx*sx+sy*sy)); /* distance to the furthest hatch we will have to create

TODO: this could be optimized for bounding boxes where width is very different than height for

certain hatch angles */

double rref= rx*ct + ry*st; /* distance to the line passing through the refpoint, origin is

(0,0) of the imageObj */

double rcorner; /* distance to the line passing through the topleft or bottomleft corner

of the hatch bbox (origin is (0,0) of imageObj) */

/* calculate the distance from the refpoint to the top right of the path */

if(angle < 90) {

rcorner = ox*ct + oy*st;

r0 = step - fmod(rcorner-rref,step);

if(rcorner-rref<0) r0 -= step;

} else {

rcorner = ox*ct + (oy+sy)*st;

r0 = step - fmod(rcorner-rref,step);

if(rcorner-rref<0) r0 -= step;

st = -st;

invst = -invst;

}

//parametrize each line as r = x.cos(theta) + y.sin(theta)

for(double r=r0; r<rmax; r+=step) {

int inter=0;

double x,y;

double pt[4]; //array to store the coordinates of intersection of the line with the sides

//in the general case there will only be two intersections

//so pt[4] should be sufficient to store the coordinates of the intersection,

//but we allocate pt[8] to treat the special and rare/unfortunate case when the

//line is a perfect diagonal (and therfore intersects all four sides)

//note that the order for testing is important in this case so that the first

//two intersection points actually correspond to the diagonal and not a degenerate line

//test for intersection with each side

y=r*invst;

x=0; // test for intersection with left of image

if(y>=0&&y<=sy) {

pt[2*inter]=x;

pt[2*inter+1]=y;

inter++;

}

x=sx;

y=(r-sx*ct)*invst;// test for intersection with right of image

if(y>=0&&y<=sy) {

pt[2*inter]=x;

pt[2*inter+1]=y;

inter++;

}

if(inter<2) {

y=0;

x=r*invct;// test for intersection with top of image

if(x>=0&&x<=sx) {

pt[2*inter]=x;

pt[2*inter+1]=y;

inter++;

}

if(inter<2) {

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