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+ affine transform for raster markers - #1279

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This commit is contained in:
artemp 2012-07-17 17:10:24 +01:00
parent 0eddc2b5a0
commit 195b8ad887
1 changed files with 72 additions and 31 deletions
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75
src/agg/agg_renderer.cpp
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@ -42,7 +42,11 @@
#include "agg_rendering_buffer.h"
#include "agg_pixfmt_rgba.h"
#include "agg_scanline_u.h"
#include "agg_image_filters.h"
#include "agg_trans_bilinear.h"
#include "agg_span_allocator.h"
#include "agg_image_accessors.h"
#include "agg_span_image_filter_rgba.h"
// boost
#include <boost/utility.hpp>
#include <boost/make_shared.hpp>
@ -263,8 +267,6 @@ void agg_renderer<T>::end_style_processing(feature_type_style const& st)
template <typename T>
void agg_renderer<T>::render_marker(pixel_position const& pos, marker const& marker, agg::trans_affine const& tr,
double opacity, composite_mode_e comp_op)
{
if (marker.is_vector())
{
typedef agg::rgba8 color_type;
typedef agg::order_rgba order_type;
@ -282,6 +284,8 @@ void agg_renderer<T>::render_marker(pixel_position const& pos, marker const& mar
pixf.comp_op(static_cast<agg::comp_op_e>(comp_op));
renderer_base renb(pixf);
if (marker.is_vector())
{
box2d<double> const& bbox = (*marker.get_vector_data())->bounding_box();
coord<double,2> c = bbox.center();
// center the svg marker on '0,0'
@ -304,12 +308,12 @@ void agg_renderer<T>::render_marker(pixel_position const& pos, marker const& mar
}
else
{
double w = (*marker.get_bitmap_data())->width();
double h = (*marker.get_bitmap_data())->height();
double cx = 0.5 * w;
double cy = 0.5 * h;
double width = (*marker.get_bitmap_data())->width();
double height = (*marker.get_bitmap_data())->height();
double cx = 0.5 * width;
double cy = 0.5 * height;
if (std::fabs(1.0 - scale_factor_) < 0.001)
if (std::fabs(1.0 - scale_factor_) < 0.001 && tr.is_identity())
{
composite(current_buffer_->data(), **marker.get_bitmap_data(),
comp_op, opacity,
@ -319,15 +323,52 @@ void agg_renderer<T>::render_marker(pixel_position const& pos, marker const& mar
}
else
{
double scaled_width = w * scale_factor_;
double scaled_height = h * scale_factor_;
image_data_32 buf(std::ceil(scaled_width),std::ceil(scaled_height));
scale_image_agg(buf, **marker.get_bitmap_data(), SCALING_BILINEAR, scale_factor_);
composite(current_buffer_->data(), buf,
comp_op, opacity,
boost::math::iround(pos.x - 0.5*scaled_width),
boost::math::iround(pos.y - 0.5*scaled_height),
false);
double p[8];
double x0 = pos.x - 0.5 * width;
double y0 = pos.y - 0.5 * height;
p[0] = x0; p[1] = y0;
p[2] = x0 + width; p[3] = y0;
p[4] = x0 + width; p[5] = y0 + height;
p[6] = x0; p[7] = y0 + height;
agg::trans_affine marker_tr;
marker_tr *= agg::trans_affine_translation(-pos.x,-pos.y);
marker_tr *= tr;
marker_tr *= agg::trans_affine_scaling(scale_factor_);
marker_tr *= agg::trans_affine_translation(pos.x,pos.y);
marker_tr.transform(&p[0], &p[1]);
marker_tr.transform(&p[2], &p[3]);
marker_tr.transform(&p[4], &p[5]);
marker_tr.transform(&p[6], &p[7]);
ras_ptr->move_to_d(p[0],p[1]);
ras_ptr->line_to_d(p[2],p[3]);
ras_ptr->line_to_d(p[4],p[5]);
ras_ptr->line_to_d(p[6],p[7]);
agg::span_allocator<color_type> sa;
agg::image_filter_bilinear filter_kernel;
agg::image_filter_lut filter(filter_kernel, false);
image_data_32 const& src = **marker.get_bitmap_data();
agg::rendering_buffer marker_buf((unsigned char *)src.getBytes(),
src.width(),
src.height(),
src.width()*4);
agg::pixfmt_rgba32_pre pixf(marker_buf);
typedef agg::image_accessor_clone<agg::pixfmt_rgba32_pre> img_accessor_type;
typedef agg::span_interpolator_linear<agg::trans_affine> interpolator_type;
typedef agg::span_image_filter_rgba_2x2<img_accessor_type,
interpolator_type> span_gen_type;
img_accessor_type ia(pixf);
interpolator_type interpolator(agg::trans_affine(p, 0, 0, width, height) );
span_gen_type sg(ia, interpolator, filter);
agg::render_scanlines_aa(*ras_ptr, sl, renb, sa, sg);
}
}
}