直接贴代码了....
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1 #include <stdio.h> 2 #include "agg_basics.h" 3 #include "agg_rendering_buffer.h" 4 #include "agg_rasterizer_scanline_aa.h" 5 #include "agg_scanline_u.h" 6 #include "agg_renderer_scanline.h" 7 #include "agg_pixfmt_rgb.h" 8 #include "agg_gamma_lut.h" 9 #include "agg_conv_dash.h" 10 #include "agg_conv_stroke.h" 11 #include "agg_span_gradient.h" 12 #include "agg_span_interpolator_linear.h" 13 #include "agg_span_gouraud_rgba.h" 14 #include "agg_span_allocator.h" 15 #include "agg_platform_support.h" 16 #include "agg_slider_ctrl.h" 17 #include "agg_cbox_ctrl.h" 18 #include "agg_rounded_rect.h" 19 20 enum flip_y_e { flip_y = true }; 21 22 23 typedef agg::gamma_lut<agg::int8u, agg::int8u, 8, 8> gamma_lut_type; 24 typedef agg::pixfmt_bgr24 pixfmt_type; 25 typedef pixfmt_type::color_type color_type; 26 typedef agg::renderer_base<pixfmt_type> renderer_base_type; 27 typedef agg::renderer_scanline_aa_solid<renderer_base_type> renderer_scanline_type; 28 typedef agg::scanline_u8 scanline_type; 29 typedef agg::rasterizer_scanline_aa<> rasterizer_type; 30 31 32 // A simple function to form the gradient color array 33 // consisting of 3 colors, "begin", "middle", "end" 34 //--------------------------------------------------- 35 template<class ColorArrayT> 36 void fill_color_array(ColorArrayT& array, 37 color_type begin, 38 color_type end) 39 { 40 unsigned i; 41 for(i = 0; i < 256; ++i) 42 { 43 array[i] = begin.gradient(end, i / 255.0); 44 } 45 } 46 47 48 class the_application : public agg::platform_support 49 { 50 double m_x[2]; 51 double m_y[2]; 52 double m_dx; 53 double m_dy; 54 int m_idx; 55 56 57 58 agg::slider_ctrl<agg::rgba8> m_radius;//圆角半径 59 agg::slider_ctrl<agg::rgba8> m_offset;//偏移量 60 61 agg::slider_ctrl<agg::rgba8> gradientx;//x方向渐变程度 62 agg::slider_ctrl<agg::rgba8> gradienty;//y方向渐变程度 63 64 agg::slider_ctrl<agg::rgba8> leftr;//左边起始点红色分量 65 agg::slider_ctrl<agg::rgba8> leftg;//左边起始点绿色分量 66 agg::slider_ctrl<agg::rgba8> leftb;//左边起始点蓝色分量 67 68 agg::slider_ctrl<agg::rgba8> rightr;//右边起始点红色分量 69 agg::slider_ctrl<agg::rgba8> rightg;//右边起始点绿色分量 70 agg::slider_ctrl<agg::rgba8> rightb;//右边起始点蓝色分量 71 public: 72 the_application(agg::pix_format_e format, bool flip_y) : 73 agg::platform_support(format, flip_y), 74 m_idx(-1), 75 m_radius(10, 10, 300-10, 19, !flip_y), 76 m_offset(10, 10+20, 300-10, 19+20, !flip_y), 77 gradientx(300, 10, 600-10, 19, !flip_y), 78 gradienty(300, 10+20, 600-10, 19+20, !flip_y), 79 leftr(10, 10+40, 300-10, 19+40, !flip_y), 80 leftg(10, 10+60, 300-10, 19+60, !flip_y), 81 leftb(10, 10+80, 300-10, 19+80, !flip_y), 82 rightr(300, 10+40, 600-10, 19+40, !flip_y), 83 rightg(300, 10+60, 600-10, 19+60, !flip_y), 84 rightb(300, 10+80, 600-10, 19+80, !flip_y) 85 { 86 m_x[0] = 100; m_y[0] = 200; 87 m_x[1] = 500; m_y[1] = 550; 88 add_ctrl(m_radius); 89 add_ctrl(m_offset); 90 91 add_ctrl(gradientx); 92 add_ctrl(gradienty); 93 94 add_ctrl(leftr); 95 add_ctrl(leftg); 96 add_ctrl(leftb); 97 98 add_ctrl(rightr); 99 add_ctrl(rightg); 100 add_ctrl(rightb); 101 102 { 103 gradientx.label("x=%4.3f"); 104 gradientx.range(-1.0, 1.0); 105 gradientx.value(0.5); 106 107 gradienty.label("y=%4.3f"); 108 gradienty.range(-1.0, 1.0); 109 gradienty.value(0.5); 110 } 111 { 112 leftr.label("lr=%4.3f"); 113 leftr.range(0.0, 1.0); 114 leftr.value(0.5); 115 116 leftg.label("lg=%4.3f"); 117 leftg.range(0.0, 1.0); 118 leftg.value(0.5); 119 120 leftb.label("lb=%4.3f"); 121 leftb.range(0.0, 1.0); 122 leftb.value(0.5); 123 } 124 { 125 rightr.label("lr=%4.3f"); 126 rightr.range(0.0, 1.0); 127 rightr.value(0.5); 128 129 rightg.label("lg=%4.3f"); 130 rightg.range(0.0, 1.0); 131 rightg.value(0.5); 132 133 rightb.label("lb=%4.3f"); 134 rightb.range(0.0, 1.0); 135 rightb.value(0.5); 136 } 137 m_radius.label("radius=%4.3f"); 138 m_radius.range(0.0, 50.0); 139 m_radius.value(25.0); 140 141 m_offset.label("subpixel offset=%4.3f"); 142 m_offset.range(-2.0, 3.0); 143 } 144 145 146 virtual ~the_application() 147 { 148 } 149 150 151 virtual void on_init() 152 { 153 } 154 155 156 virtual void on_draw() 157 { 158 pixfmt_type pixf(rbuf_window()); 159 renderer_base_type ren_base(pixf); 160 renderer_scanline_type ren_sl(ren_base); 161 scanline_type sl; 162 rasterizer_type ras; 163 164 ren_base.clear(agg::rgba(0,0,0)); 165 166 { 167 168 agg::renderer_scanline_aa_solid<renderer_base_type>ren(ren_base); 169 ren.color(agg::rgba8(127,127,127)); 170 171 agg::ellipse e; 172 // Render two "control" circles 173 e.init(m_x[0], m_y[0], 3, 3, 16); 174 ras.add_path(e); 175 //agg::render_scanlines_aa_solid(ras, sl, ren_base, agg::rgba8(127, 127, 127)); 176 agg::render_scanlines(ras, sl, ren); 177 e.init(m_x[1], m_y[1], 3, 3, 16); 178 ras.add_path(e); 179 //agg::render_scanlines_aa_solid(ras, sl, ren_base, agg::rgba8(127, 127, 127)); 180 agg::render_scanlines(ras, sl, ren); 181 182 183 } 184 double d = m_offset.value(); 185 186 typedef agg::gradient_x gradient_func_type; 187 typedef agg::span_interpolator_linear<> interpolator_type; 188 typedef agg::span_allocator<color_type> span_allocator_type; 189 typedef agg::pod_auto_array<color_type, 256> color_array_type; 190 typedef agg::span_gradient<color_type, 191 interpolator_type, 192 gradient_func_type, 193 color_array_type> span_gradient_type; 194 195 typedef agg::renderer_scanline_aa<renderer_base_type, 196 span_allocator_type, 197 span_gradient_type> renderer_gradient_type; 198 199 gradient_func_type gradient_func; // The gradient function 200 agg::trans_affine gradient_mtx; // Affine transformer 201 interpolator_type span_interpolator(gradient_mtx); // Span interpolator 202 span_allocator_type span_allocator; // Span Allocator 203 color_array_type gradient_colors; // The gradient colors 204 span_gradient_type span_gradient(span_interpolator, 205 gradient_func, 206 gradient_colors, 207 0, 100); 208 209 renderer_gradient_type ren_gradient(ren_base, span_allocator, span_gradient); 210 211 double x1=m_x[0]+d, y1=m_y[0]+d, x2=m_x[1]+d, y2=m_y[1]+d; 212 213 { 214 //---------------- 215 fill_color_array(gradient_colors, 216 agg::rgba(leftr.value(),leftg.value(),leftb.value()), 217 agg::rgba(rightr.value(),rightg.value(),rightb.value())); 218 219 { 220 double gradient_d2 = 100.0; 221 double dx = (x2 - x1)*gradientx.value(); 222 double dy = (y2 - y1)*gradienty.value(); 223 gradient_mtx.reset(); 224 gradient_mtx *= agg::trans_affine_scaling(sqrt(dx * dx + dy * dy) / gradient_d2); 225 gradient_mtx *= agg::trans_affine_rotation(atan2(dy, dx)); 226 gradient_mtx *= agg::trans_affine_translation(x1 + 0.5, y1 + 0.5); 227 gradient_mtx.invert(); 228 } 229 agg::rounded_rect r(x1, y1, x2, y2, m_radius.value()); 230 r.normalize_radius(); 231 ras.add_path(r); 232 agg::render_scanlines(ras, sl, ren_gradient); 233 } 234 // Reset AA Gamma and render the controls 235 // Render the controls 236 237 agg::render_ctrl(ras, sl, ren_base, m_radius); 238 agg::render_ctrl(ras, sl, ren_base, m_offset); 239 240 agg::render_ctrl(ras, sl, ren_base, gradientx); 241 agg::render_ctrl(ras, sl, ren_base, gradienty); 242 243 agg::render_ctrl(ras, sl, ren_base, leftr); 244 agg::render_ctrl(ras, sl, ren_base, leftg); 245 agg::render_ctrl(ras, sl, ren_base, leftb); 246 247 agg::render_ctrl(ras, sl, ren_base, rightr); 248 agg::render_ctrl(ras, sl, ren_base, rightb); 249 agg::render_ctrl(ras, sl, ren_base, rightg); 250 } 251 252 253 254 virtual void on_mouse_button_down(int x, int y, unsigned flags) 255 { 256 if(flags & agg::mouse_left) 257 { 258 unsigned i; 259 for (i = 0; i < 2; i++) 260 { 261 if(sqrt( (x-m_x[i]) * (x-m_x[i]) + (y-m_y[i]) * (y-m_y[i]) ) < 5.0) 262 { 263 m_dx = x - m_x[i]; 264 m_dy = y - m_y[i]; 265 m_idx = i; 266 break; 267 } 268 } 269 } 270 //update_window(); 271 } 272 273 274 275 276 virtual void on_mouse_move(int x, int y, unsigned flags) 277 { 278 if(flags & agg::mouse_left) 279 { 280 if(m_idx >= 0) 281 { 282 m_x[m_idx] = x - m_dx; 283 m_y[m_idx] = y - m_dy; 284 force_redraw(); 285 } 286 } 287 else 288 { 289 on_mouse_button_up(x, y, flags); 290 } 291 } 292 293 virtual void on_mouse_button_up(int x, int y, unsigned flags) 294 { 295 m_idx = -1; 296 } 297 }; 298 299 300 int agg_main(int argc, char* argv[]) 301 { 302 the_application app(agg::pix_format_bgr24, flip_y); 303 app.caption("AGG Example. Anti-Aliasing Test"); 304 305 if(app.init(600, 600, agg::window_resize)) 306 { 307 return app.run(); 308 } 309 return 1; 310 }
最终效果
怎么上传源码呢？有谁告诉我么？
欢迎与一起学习agg的朋友共同交流哈，网上资料不多
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