1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
#include <stdlib.h>
#include <ctype.h>
#include <stdio.h>
#include "agg_basics.h"
#include "agg_rendering_buffer.h"
#include "agg_rasterizer_scanline_aa.h"
#include "agg_scanline_p.h"
#include "agg_renderer_scanline.h"
#include "agg_path_storage.h"
#include "agg_conv_transform.h"
#include "agg_bounding_rect.h"
#include "ctrl/agg_slider_ctrl.h"
#include "platform/agg_platform_support.h"
//#define AGG_GRAY16
//#define AGG_BGR24
//#define AGG_BGR48
//#define AGG_RGB_AAA
#define AGG_BGRA32
//#define AGG_RGBA32
//#define AGG_ARGB32
//#define AGG_ABGR32
//#define AGG_RGB565
//#define AGG_RGB555
#include "pixel_formats.h"
enum flip_y_e { flip_y = true };
agg::rasterizer_scanline_aa<> g_rasterizer;
agg::scanline_p8 g_scanline;
agg::path_storage g_path;
agg::rgba8 g_colors[100];
unsigned g_path_idx[100];
unsigned g_npaths = 0;
double g_x1 = 0;
double g_y1 = 0;
double g_x2 = 0;
double g_y2 = 0;
double g_base_dx = 0;
double g_base_dy = 0;
double g_angle = 0;
double g_scale = 1.0;
double g_skew_x = 0;
double g_skew_y = 0;
int g_nclick = 0;
unsigned parse_lion(agg::path_storage& ps, agg::rgba8* colors, unsigned* path_idx);
void parse_lion()
{
g_npaths = parse_lion(g_path, g_colors, g_path_idx);
agg::pod_array_adaptor<unsigned> path_idx(g_path_idx, 100);
agg::bounding_rect(g_path, path_idx, 0, g_npaths, &g_x1, &g_y1, &g_x2, &g_y2);
g_base_dx = (g_x2 - g_x1) / 2.0;
g_base_dy = (g_y2 - g_y1) / 2.0;
}
class the_application : public agg::platform_support
{
agg::slider_ctrl<agg::rgba8> m_alpha_slider;
public:
typedef agg::renderer_base<pixfmt> renderer_base;
typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_solid;
the_application(agg::pix_format_e format, bool flip_y) :
agg::platform_support(format, flip_y),
m_alpha_slider(5, 5, 512-5, 12, !flip_y)
{
parse_lion();
add_ctrl(m_alpha_slider);
m_alpha_slider.no_transform();
m_alpha_slider.label("Alpha%3.3f");
m_alpha_slider.value(0.1);
}
virtual void on_resize(int cx, int cy)
{
pixfmt pf(rbuf_window());
renderer_base r(pf);
r.clear(agg::rgba(1, 1, 1));
}
virtual void on_draw()
{
int width = rbuf_window().width();
int height = rbuf_window().height();
unsigned i;
for(i = 0; i < g_npaths; i++)
{
g_colors[i].a = agg::int8u(m_alpha_slider.value() * 255);
}
pixfmt pixf(rbuf_window());
renderer_base rb(pixf);
renderer_solid r(rb);
agg::trans_affine mtx;
mtx *= agg::trans_affine_translation(-g_base_dx, -g_base_dy);
mtx *= agg::trans_affine_scaling(g_scale, g_scale);
mtx *= agg::trans_affine_rotation(g_angle + agg::pi);
mtx *= agg::trans_affine_skewing(g_skew_x/1000.0, g_skew_y/1000.0);
mtx *= agg::trans_affine_translation(width/2, height/2);
// This code renders the lion:
agg::conv_transform<agg::path_storage, agg::trans_affine> trans(g_path, mtx);
agg::render_all_paths(g_rasterizer, g_scanline, r, trans, g_colors, g_path_idx, g_npaths);
// Render the control
agg::render_ctrl(g_rasterizer, g_scanline, rb, m_alpha_slider);
}
void transform(double width, double height, double x, double y)
{
x -= width / 2;
y -= height / 2;
g_angle = atan2(y, x);
g_scale = sqrt(y * y + x * x) / 100.0;
}
virtual void on_mouse_button_down(int x, int y, unsigned flags)
{
if(flags & agg::mouse_left)
{
int width = rbuf_window().width();
int height = rbuf_window().height();
transform(width, height, x, y);
force_redraw();
}
if(flags & agg::mouse_right)
{
g_skew_x = x;
g_skew_y = y;
force_redraw();
}
}
virtual void on_mouse_move(int x, int y, unsigned flags)
{
on_mouse_button_down(x, y, flags);
}
};
int agg_main(int argc, char* argv[])
{
the_application app(pix_format, flip_y);
app.caption("AGG Example. Lion");
if(app.init(512, 400, agg::window_resize))
{
return app.run();
}
return 1;
}
|
