MapServer/src/mapagg.cpp at main · MapServer/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"

#include "cpl_conv.h" // CPLGetConfigOption

#include "cpl_string.h" // CPLTestBool

#ifdef USE_PIXMAN

#include <pixman.h>

#endif

#include <limits>

#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 const 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;

unsigned n; // index of contour in outline

unsigned first; // index of first point in contour

char tag; // current point's state

first = 0;

for (n = 0; n < (unsigned)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;

auto 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 +

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)

unsigned alpha = mapserver::cover_full;

if (style && style->color) {

alpha = style->color->alpha;

}

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

MS_NINT(y - pixmap->height / 2.), alpha);

}

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;

}

if (width > 0 && height > 0) {

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 */

const AGG_INT64U bufSize64 =

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

if (bufSize64 > std::numeric_limits<size_t>::max() / 2) {

msSetError(MS_MEMERR,

"%s: %d: Out of memory allocating " AGG_INT64U_FRMT

" bytes.\n",

"agg2CreateImage()", __FILE__, __LINE__, bufSize64);

free(image);

delete r;

return NULL;

}

const size_t bufSize = (size_t)bufSize64;

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;

} else {

msSetError(MS_RENDERERERR, "Cannot create cairo image of size %dx%d.",

"msImageCreateCairo()", width, height);

}

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);

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MapServer/src/mapagg.cpp at main · MapServer/MapServer · GitHub

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