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agg/examples/line_patterns.cpp

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#include <math.h>
#include <stdio.h>
#include <time.h>
#include "agg_basics.h"
#include "agg_rendering_buffer.h"
#include "agg_conv_transform.h"
#include "agg_conv_stroke.h"
#include "agg_conv_clip_polyline.h"
#include "agg_scanline_p.h"
#include "agg_renderer_scanline.h"
#include "agg_rasterizer_outline_aa.h"
#include "agg_rasterizer_scanline_aa.h"
#include "agg_pattern_filters_rgba.h"
#include "agg_renderer_outline_aa.h"
#include "agg_renderer_outline_image.h"
#include "agg_pixfmt_rgb.h"
#include "ctrl/agg_slider_ctrl.h"
#include "ctrl/agg_bezier_ctrl.h"
#include "platform/agg_platform_support.h"
#define AGG_BGRA32
//#define AGG_BGRA128
#include "pixel_formats.h"
enum flip_y_e { flip_y = true };
static agg::int8u brightness_to_alpha[256 * 3] =
{
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 254, 254, 254, 254, 254, 254,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 253, 253,
253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 252,
252, 252, 252, 252, 252, 252, 252, 252, 252, 252, 252, 251, 251, 251, 251, 251,
251, 251, 251, 251, 250, 250, 250, 250, 250, 250, 250, 250, 249, 249, 249, 249,
249, 249, 249, 248, 248, 248, 248, 248, 248, 248, 247, 247, 247, 247, 247, 246,
246, 246, 246, 246, 246, 245, 245, 245, 245, 245, 244, 244, 244, 244, 243, 243,
243, 243, 243, 242, 242, 242, 242, 241, 241, 241, 241, 240, 240, 240, 239, 239,
239, 239, 238, 238, 238, 238, 237, 237, 237, 236, 236, 236, 235, 235, 235, 234,
234, 234, 233, 233, 233, 232, 232, 232, 231, 231, 230, 230, 230, 229, 229, 229,
228, 228, 227, 227, 227, 226, 226, 225, 225, 224, 224, 224, 223, 223, 222, 222,
221, 221, 220, 220, 219, 219, 219, 218, 218, 217, 217, 216, 216, 215, 214, 214,
213, 213, 212, 212, 211, 211, 210, 210, 209, 209, 208, 207, 207, 206, 206, 205,
204, 204, 203, 203, 202, 201, 201, 200, 200, 199, 198, 198, 197, 196, 196, 195,
194, 194, 193, 192, 192, 191, 190, 190, 189, 188, 188, 187, 186, 186, 185, 184,
183, 183, 182, 181, 180, 180, 179, 178, 177, 177, 176, 175, 174, 174, 173, 172,
171, 171, 170, 169, 168, 167, 166, 166, 165, 164, 163, 162, 162, 161, 160, 159,
158, 157, 156, 156, 155, 154, 153, 152, 151, 150, 149, 148, 148, 147, 146, 145,
144, 143, 142, 141, 140, 139, 138, 137, 136, 135, 134, 133, 132, 131, 130, 129,
128, 128, 127, 125, 124, 123, 122, 121, 120, 119, 118, 117, 116, 115, 114, 113,
112, 111, 110, 109, 108, 107, 106, 105, 104, 102, 101, 100, 99, 98, 97, 96,
95, 94, 93, 91, 90, 89, 88, 87, 86, 85, 84, 82, 81, 80, 79, 78,
77, 75, 74, 73, 72, 71, 70, 69, 67, 66, 65, 64, 63, 61, 60, 59,
58, 57, 56, 54, 53, 52, 51, 50, 48, 47, 46, 45, 44, 42, 41, 40,
39, 37, 36, 35, 34, 33, 31, 30, 29, 28, 27, 25, 24, 23, 22, 20,
19, 18, 17, 15, 14, 13, 12, 11, 9, 8, 7, 6, 4, 3, 2, 1
};
class pattern_src_brightness_to_alpha
{
public:
pattern_src_brightness_to_alpha(agg::rendering_buffer& rb) :
m_rb(&rb), m_pf(*m_rb) {}
unsigned width() const { return m_pf.width(); }
unsigned height() const { return m_pf.height(); }
color_type pixel(int x, int y) const
{
color_type c = m_pf.pixel(x, y);
// It's a bit of a hack, but we can treat the 8-bit alpha value as a cover.
color_type::calc_type sum = c.r + c.g + c.b;
int i = int(sum * sizeof(brightness_to_alpha) / (3 * color_type::full_value()));
agg::cover_type cover = brightness_to_alpha[i];
c.a = color_type::mult_cover(color_type::full_value(), cover);
return c;
}
private:
agg::rendering_buffer* m_rb;
pixfmt m_pf;
};
class the_application : public agg::platform_support
{
agg::srgba8 m_ctrl_color;
agg::bezier_ctrl<color_type> m_curve1;
agg::bezier_ctrl<color_type> m_curve2;
agg::bezier_ctrl<color_type> m_curve3;
agg::bezier_ctrl<color_type> m_curve4;
agg::bezier_ctrl<color_type> m_curve5;
agg::bezier_ctrl<color_type> m_curve6;
agg::bezier_ctrl<color_type> m_curve7;
agg::bezier_ctrl<color_type> m_curve8;
agg::bezier_ctrl<color_type> m_curve9;
agg::slider_ctrl<color_type> m_scale_x;
agg::slider_ctrl<color_type> m_start_x;
public:
typedef agg::renderer_base<pixfmt> renderer_base;
typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_scanline;
typedef agg::rasterizer_scanline_aa<> rasterizer_scanline;
typedef agg::scanline_p8 scanline;
the_application(agg::pix_format_e format, bool flip_y) :
agg::platform_support(format, flip_y),
m_ctrl_color(agg::rgba(0, 0.3, 0.5, 0.3)),
m_scale_x(5.0, 5.0, 240.0, 12.0, !flip_y),
m_start_x(250.0, 5.0, 495.0, 12.0, !flip_y)
{
m_curve1.line_color(m_ctrl_color);
m_curve2.line_color(m_ctrl_color);
m_curve3.line_color(m_ctrl_color);
m_curve4.line_color(m_ctrl_color);
m_curve5.line_color(m_ctrl_color);
m_curve6.line_color(m_ctrl_color);
m_curve7.line_color(m_ctrl_color);
m_curve8.line_color(m_ctrl_color);
m_curve9.line_color(m_ctrl_color);
m_curve1.curve(64, 19, 14, 126, 118, 266, 19, 265);
m_curve2.curve(112, 113, 178, 32, 200, 132, 125, 438);
m_curve3.curve(401, 24, 326, 149, 285, 11, 177, 77);
m_curve4.curve(188, 427, 129, 295, 19, 283, 25, 410);
m_curve5.curve(451, 346, 302, 218, 265, 441, 459, 400);
m_curve6.curve(454, 198, 14, 13, 220, 291, 483, 283);
m_curve7.curve(301, 398, 355, 231, 209, 211, 170, 353);
m_curve8.curve(484, 101, 222, 33, 486, 435, 487, 138);
m_curve9.curve(143, 147, 11, 45, 83, 427, 132, 197);
add_ctrl(m_curve1);
add_ctrl(m_curve2);
add_ctrl(m_curve3);
add_ctrl(m_curve4);
add_ctrl(m_curve5);
add_ctrl(m_curve6);
add_ctrl(m_curve7);
add_ctrl(m_curve8);
add_ctrl(m_curve9);
m_curve1.no_transform();
m_curve2.no_transform();
m_curve3.no_transform();
m_curve4.no_transform();
m_curve5.no_transform();
m_curve6.no_transform();
m_curve7.no_transform();
m_curve8.no_transform();
m_curve9.no_transform();
m_scale_x.label("Scale X=%.2f");
m_scale_x.range(0.2, 3.0);
m_scale_x.value(1.0);
m_scale_x.no_transform();
add_ctrl(m_scale_x);
m_start_x.label("Start X=%.2f");
m_start_x.range(0.0, 10.0);
m_start_x.value(0.0);
m_start_x.no_transform();
add_ctrl(m_start_x);
}
template<class Pattern,
class Rasterizer,
class Renderer,
class PatternSource,
class VertexSource>
void draw_curve(Pattern& patt,
Rasterizer& ras,
Renderer& ren,
PatternSource& src,
VertexSource& vs)
{
patt.create(src);
ren.scale_x(m_scale_x.value());
ren.start_x(m_start_x.value());
ras.add_path(vs);
}
virtual void on_draw()
{
pixfmt pf(rbuf_window());
renderer_base ren_base(pf);
ren_base.clear(agg::rgba(1.0, 1.0, 0.95));
renderer_scanline ren(ren_base);
rasterizer_scanline ras;
scanline sl;
// Pattern source. Must have an interface:
// width() const
// height() const
// pixel(int x, int y) const
// Any agg::renderer_base<> or derived
// is good for the use as a source.
//-----------------------------------
pattern_src_brightness_to_alpha p1(rbuf_img(0));
pattern_src_brightness_to_alpha p2(rbuf_img(1));
pattern_src_brightness_to_alpha p3(rbuf_img(2));
pattern_src_brightness_to_alpha p4(rbuf_img(3));
pattern_src_brightness_to_alpha p5(rbuf_img(4));
pattern_src_brightness_to_alpha p6(rbuf_img(5));
pattern_src_brightness_to_alpha p7(rbuf_img(6));
pattern_src_brightness_to_alpha p8(rbuf_img(7));
pattern_src_brightness_to_alpha p9(rbuf_img(8));
agg::pattern_filter_bilinear_rgba<color_type> fltr; // Filtering functor
// agg::line_image_pattern is the main container for the patterns. It creates
// a copy of the patterns extended according to the needs of the filter.
// agg::line_image_pattern can operate with arbitrary image width, but if the
// width of the pattern is power of 2, it's better to use the modified
// version agg::line_image_pattern_pow2 because it works about 15-25 percent
// faster than agg::line_image_pattern (because of using simple masking instead
// of expensive '%' operation).
typedef agg::line_image_pattern<agg::pattern_filter_bilinear_rgba<color_type> > pattern_type;
typedef agg::renderer_base<pixfmt> base_ren_type;
typedef agg::renderer_outline_image<base_ren_type, pattern_type> renderer_type;
typedef agg::rasterizer_outline_aa<renderer_type> rasterizer_type;
//-- Create with specifying the source
//pattern_type patt(fltr, src);
//-- Create uninitialized and set the source
pattern_type patt(fltr);
renderer_type ren_img(ren_base, patt);
rasterizer_type ras_img(ren_img);
draw_curve(patt, ras_img, ren_img, p1, m_curve1.curve());
draw_curve(patt, ras_img, ren_img, p2, m_curve2.curve());
draw_curve(patt, ras_img, ren_img, p3, m_curve3.curve());
draw_curve(patt, ras_img, ren_img, p4, m_curve4.curve());
draw_curve(patt, ras_img, ren_img, p5, m_curve5.curve());
draw_curve(patt, ras_img, ren_img, p6, m_curve6.curve());
draw_curve(patt, ras_img, ren_img, p7, m_curve7.curve());
draw_curve(patt, ras_img, ren_img, p8, m_curve8.curve());
draw_curve(patt, ras_img, ren_img, p9, m_curve9.curve());
agg::render_ctrl(ras, sl, ren_base, m_curve1);
agg::render_ctrl(ras, sl, ren_base, m_curve2);
agg::render_ctrl(ras, sl, ren_base, m_curve3);
agg::render_ctrl(ras, sl, ren_base, m_curve4);
agg::render_ctrl(ras, sl, ren_base, m_curve5);
agg::render_ctrl(ras, sl, ren_base, m_curve6);
agg::render_ctrl(ras, sl, ren_base, m_curve7);
agg::render_ctrl(ras, sl, ren_base, m_curve8);
agg::render_ctrl(ras, sl, ren_base, m_curve9);
agg::render_ctrl(ras, sl, ren_base, m_scale_x);
agg::render_ctrl(ras, sl, ren_base, m_start_x);
}
virtual void on_key(int x, int y, unsigned key, unsigned flags)
{
if(key == ' ')
{
FILE* fd = fopen(full_file_name("coord"), "w");
fprintf(fd, "%.0f, %.0f, %.0f, %.0f, %.0f, %.0f, %.0f, %.0f",
m_curve1.x1(), m_curve1.y1(),
m_curve1.x2(), m_curve1.y2(),
m_curve1.x3(), m_curve1.y3(),
m_curve1.x4(), m_curve1.y4());
fclose(fd);
}
}
virtual void on_ctrl_change()
{
}
};
int agg_main(int argc, char* argv[])
{
the_application app(pix_format, flip_y);
app.caption("AGG Example. Drawing Lines with Image Patterns");
if(!app.load_img(0, "1") ||
!app.load_img(1, "2") ||
!app.load_img(2, "3") ||
!app.load_img(3, "4") ||
!app.load_img(4, "5") ||
!app.load_img(5, "6") ||
!app.load_img(6, "7") ||
!app.load_img(7, "8") ||
!app.load_img(8, "9"))
{
char buf[256];
sprintf(buf, "There must be files 1%s...9%s\n"
"Copy and unzip:\n"
"../art/line_patterns.bmp.zip\n"
"or\n"
"../art/line_patterns.ppm.tar.gz\n",
app.img_ext(), app.img_ext());
app.message(buf);
return 1;
}
if(app.init(500, 450, agg::window_resize))
{
return app.run();
}
return 1;
}
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