#include <stdio.h> #include <stdlib.h> #include <math.h> #include "agg_rendering_buffer.h" #include "agg_rasterizer_scanline_aa.h" #include "agg_ellipse.h" #include "agg_trans_affine.h" #include "agg_conv_transform.h" #include "agg_pixfmt_rgb.h" #include "agg_span_allocator.h" #include "agg_span_image_filter_rgb.h" #include "agg_scanline_u.h" #include "agg_renderer_scanline.h" #include "agg_span_interpolator_linear.h" #include "agg_span_interpolator_adaptor.h" #include "agg_span_gradient.h" #include "agg_image_accessors.h" #include "ctrl/agg_slider_ctrl.h" #include "ctrl/agg_rbox_ctrl.h" #include "platform/agg_platform_support.h" enum flip_y_e { flip_y = true }; static agg::int8u g_gradient_colors[] = { 255, 255, 255, 255, 255, 255, 254, 255, 255, 255, 254, 255, 255, 255, 254, 255, 255, 255, 253, 255, 255, 255, 253, 255, 255, 255, 252, 255, 255, 255, 251, 255, 255, 255, 250, 255, 255, 255, 248, 255, 255, 255, 246, 255, 255, 255, 244, 255, 255, 255, 241, 255, 255, 255, 238, 255, 255, 255, 235, 255, 255, 255, 231, 255, 255, 255, 227, 255, 255, 255, 222, 255, 255, 255, 217, 255, 255, 255, 211, 255, 255, 255, 206, 255, 255, 255, 200, 255, 255, 254, 194, 255, 255, 253, 188, 255, 255, 252, 182, 255, 255, 250, 176, 255, 255, 249, 170, 255, 255, 247, 164, 255, 255, 246, 158, 255, 255, 244, 152, 255, 254, 242, 146, 255, 254, 240, 141, 255, 254, 238, 136, 255, 254, 236, 131, 255, 253, 234, 126, 255, 253, 232, 121, 255, 253, 229, 116, 255, 252, 227, 112, 255, 252, 224, 108, 255, 251, 222, 104, 255, 251, 219, 100, 255, 251, 216, 96, 255, 250, 214, 93, 255, 250, 211, 89, 255, 249, 208, 86, 255, 249, 205, 83, 255, 248, 202, 80, 255, 247, 199, 77, 255, 247, 196, 74, 255, 246, 193, 72, 255, 246, 190, 69, 255, 245, 187, 67, 255, 244, 183, 64, 255, 244, 180, 62, 255, 243, 177, 60, 255, 242, 174, 58, 255, 242, 170, 56, 255, 241, 167, 54, 255, 240, 164, 52, 255, 239, 161, 51, 255, 239, 157, 49, 255, 238, 154, 47, 255, 237, 151, 46, 255, 236, 147, 44, 255, 235, 144, 43, 255, 235, 141, 41, 255, 234, 138, 40, 255, 233, 134, 39, 255, 232, 131, 37, 255, 231, 128, 36, 255, 230, 125, 35, 255, 229, 122, 34, 255, 228, 119, 33, 255, 227, 116, 31, 255, 226, 113, 30, 255, 225, 110, 29, 255, 224, 107, 28, 255, 223, 104, 27, 255, 222, 101, 26, 255, 221, 99, 25, 255, 220, 96, 24, 255, 219, 93, 23, 255, 218, 91, 22, 255, 217, 88, 21, 255, 216, 86, 20, 255, 215, 83, 19, 255, 214, 81, 18, 255, 213, 79, 17, 255, 212, 77, 17, 255, 211, 74, 16, 255, 210, 72, 15, 255, 209, 70, 14, 255, 207, 68, 13, 255, 206, 66, 13, 255, 205, 64, 12, 255, 204, 62, 11, 255, 203, 60, 10, 255, 202, 58, 10, 255, 201, 56, 9, 255, 199, 55, 9, 255, 198, 53, 8, 255, 197, 51, 7, 255, 196, 50, 7, 255, 195, 48, 6, 255, 193, 46, 6, 255, 192, 45, 5, 255, 191, 43, 5, 255, 190, 42, 4, 255, 188, 41, 4, 255, 187, 39, 3, 255, 186, 38, 3, 255, 185, 37, 2, 255, 183, 35, 2, 255, 182, 34, 1, 255, 181, 33, 1, 255, 179, 32, 1, 255, 178, 30, 0, 255, 177, 29, 0, 255, 175, 28, 0, 255, 174, 27, 0, 255, 173, 26, 0, 255, 171, 25, 0, 255, 170, 24, 0, 255, 168, 23, 0, 255, 167, 22, 0, 255, 165, 21, 0, 255, 164, 21, 0, 255, 163, 20, 0, 255, 161, 19, 0, 255, 160, 18, 0, 255, 158, 17, 0, 255, 156, 17, 0, 255, 155, 16, 0, 255, 153, 15, 0, 255, 152, 14, 0, 255, 150, 14, 0, 255, 149, 13, 0, 255, 147, 12, 0, 255, 145, 12, 0, 255, 144, 11, 0, 255, 142, 11, 0, 255, 140, 10, 0, 255, 139, 10, 0, 255, 137, 9, 0, 255, 135, 9, 0, 255, 134, 8, 0, 255, 132, 8, 0, 255, 130, 7, 0, 255, 128, 7, 0, 255, 126, 6, 0, 255, 125, 6, 0, 255, 123, 5, 0, 255, 121, 5, 0, 255, 119, 4, 0, 255, 117, 4, 0, 255, 115, 4, 0, 255, 113, 3, 0, 255, 111, 3, 0, 255, 109, 2, 0, 255, 107, 2, 0, 255, 105, 2, 0, 255, 103, 1, 0, 255, 101, 1, 0, 255, 99, 1, 0, 255, 97, 0, 0, 255, 95, 0, 0, 255, 93, 0, 0, 255, 91, 0, 0, 255, 90, 0, 0, 255, 88, 0, 0, 255, 86, 0, 0, 255, 84, 0, 0, 255, 82, 0, 0, 255, 80, 0, 0, 255, 78, 0, 0, 255, 77, 0, 0, 255, 75, 0, 0, 255, 73, 0, 0, 255, 72, 0, 0, 255, 70, 0, 0, 255, 68, 0, 0, 255, 67, 0, 0, 255, 65, 0, 0, 255, 64, 0, 0, 255, 63, 0, 0, 255, 61, 0, 0, 255, 60, 0, 0, 255, 59, 0, 0, 255, 58, 0, 0, 255, 57, 0, 0, 255, 56, 0, 0, 255, 55, 0, 0, 255, 54, 0, 0, 255, 53, 0, 0, 255, 53, 0, 0, 255, 52, 0, 0, 255, 52, 0, 0, 255, 51, 0, 0, 255, 51, 0, 0, 255, 51, 0, 0, 255, 50, 0, 0, 255, 50, 0, 0, 255, 51, 0, 0, 255, 51, 0, 0, 255, 51, 0, 0, 255, 51, 0, 0, 255, 52, 0, 0, 255, 52, 0, 0, 255, 53, 0, 0, 255, 54, 1, 0, 255, 55, 2, 0, 255, 56, 3, 0, 255, 57, 4, 0, 255, 58, 5, 0, 255, 59, 6, 0, 255, 60, 7, 0, 255, 62, 8, 0, 255, 63, 9, 0, 255, 64, 11, 0, 255, 66, 12, 0, 255, 68, 13, 0, 255, 69, 14, 0, 255, 71, 16, 0, 255, 73, 17, 0, 255, 75, 18, 0, 255, 77, 20, 0, 255, 79, 21, 0, 255, 81, 23, 0, 255, 83, 24, 0, 255, 85, 26, 0, 255, 87, 28, 0, 255, 90, 29, 0, 255, 92, 31, 0, 255, 94, 33, 0, 255, 97, 34, 0, 255, 99, 36, 0, 255, 102, 38, 0, 255, 104, 40, 0, 255, 107, 41, 0, 255, 109, 43, 0, 255, 112, 45, 0, 255, 115, 47, 0, 255, 117, 49, 0, 255, 120, 51, 0, 255, 123, 52, 0, 255, 126, 54, 0, 255, 128, 56, 0, 255, 131, 58, 0, 255, 134, 60, 0, 255, 137, 62, 0, 255, 140, 64, 0, 255, 143, 66, 0, 255, 145, 68, 0, 255, 148, 70, 0, 255, 151, 72, 0, 255, 154, 74, 0, 255 }; class periodic_distortion { public: periodic_distortion() : m_cx(0.0), m_cy(0.0), m_period(0.5), m_amplitude(0.5), m_phase(0.0) {} void center(double x, double y) { m_cx = x; m_cy = y; } void period(double v) { m_period = v; } void amplitude(double v) { m_amplitude = 1.0 / v; } void phase(double v) { m_phase = v; } virtual void calculate(int* x, int* y) const = 0; protected: double m_cx; double m_cy; double m_period; double m_amplitude; double m_phase; }; inline void calculate_wave(int* x, int* y, double cx, double cy, double period, double amplitude, double phase) { double xd = double(*x) / agg::image_subpixel_scale - cx; double yd = double(*y) / agg::image_subpixel_scale - cy; double d = sqrt(xd*xd + yd*yd); if(d > 1) { double a = cos(d / (16.0 * period) - phase) * (1.0 / (amplitude * d)) + 1.0; *x = int((xd * a + cx) * agg::image_subpixel_scale); *y = int((yd * a + cy) * agg::image_subpixel_scale); } } inline void calculate_swirl(int* x, int* y, double cx, double cy, double amplitude, double phase) { double xd = double(*x) / agg::image_subpixel_scale - cx; double yd = double(*y) / agg::image_subpixel_scale - cy; double a = double(100.0 - sqrt(xd * xd + yd * yd)) / 100.0 * (0.1 / -amplitude); double sa = sin(a - phase/25.0); double ca = cos(a - phase/25.0); *x = int((xd * ca - yd * sa + cx) * agg::image_subpixel_scale); *y = int((xd * sa + yd * ca + cy) * agg::image_subpixel_scale); } class distortion_wave : public periodic_distortion { virtual void calculate(int* x, int* y) const { calculate_wave(x, y, m_cx, m_cy, m_period, m_amplitude, m_phase); } }; class distortion_swirl : public periodic_distortion { virtual void calculate(int* x, int* y) const { calculate_swirl(x, y, m_cx, m_cy, m_amplitude, m_phase); } }; class distortion_swirl_wave : public periodic_distortion { virtual void calculate(int* x, int* y) const { calculate_swirl(x, y, m_cx, m_cy, m_amplitude, m_phase); calculate_wave(x, y, m_cx, m_cy, m_period, m_amplitude, m_phase); } }; class distortion_wave_swirl : public periodic_distortion { virtual void calculate(int* x, int* y) const { calculate_wave(x, y, m_cx, m_cy, m_period, m_amplitude, m_phase); calculate_swirl(x, y, m_cx, m_cy, m_amplitude, m_phase); } }; class the_application : public agg::platform_support { agg::slider_ctrl<agg::rgba8> m_angle; agg::slider_ctrl<agg::rgba8> m_scale; agg::slider_ctrl<agg::rgba8> m_amplitude; agg::slider_ctrl<agg::rgba8> m_period; agg::rbox_ctrl<agg::rgba8> m_distortion; double m_center_x; double m_center_y; double m_phase; typedef agg::pod_auto_array<agg::rgba8, 256> color_array_type; color_array_type m_gradient_colors; public: the_application(agg::pix_format_e format, bool flip_y) : agg::platform_support(format, flip_y), m_angle (5, 5, 150, 12, !flip_y), m_scale (5, 5+15, 150, 12+15, !flip_y), m_period (5+170, 5, 150+170, 12, !flip_y), m_amplitude (5+170, 5+15, 150+170, 12+15, !flip_y), m_distortion(480, 5, 600, 90, !flip_y), m_center_x(0.0), m_center_y(0.0), m_phase(0.0) { add_ctrl(m_angle); add_ctrl(m_scale); add_ctrl(m_amplitude); add_ctrl(m_period); add_ctrl(m_distortion); m_angle.label("Angle=%3.2f"); m_scale.label("Scale=%3.2f"); m_angle.range(-180.0, 180.0); m_angle.value(20.0); m_scale.range(0.1, 5.0); m_scale.value(1.0); m_amplitude.label("Amplitude=%3.2f"); m_period.label("Period=%3.2f"); m_amplitude.range(0.1, 40.0); m_period.range(0.1, 2.0); m_amplitude.value(10.0); m_period.value(1.0); m_distortion.add_item("Wave"); m_distortion.add_item("Swirl"); m_distortion.add_item("Wave-Swirl"); m_distortion.add_item("Swirl-Wave"); m_distortion.cur_item(0); unsigned i; const agg::int8u* p = g_gradient_colors; for(i = 0; i < 256; i++) { m_gradient_colors[i] = agg::rgba8(p[0], p[1], p[2], p[3]); p += 4; } } virtual ~the_application() { } virtual void on_init() { m_center_x = rbuf_img(0).width() / 2.0 + 10; m_center_y = rbuf_img(0).height() / 2.0 + 10 + 40; } virtual void on_draw() { double img_width = rbuf_img(0).width(); double img_height = rbuf_img(0).height(); typedef agg::pixfmt_bgr24 pixfmt; typedef agg::renderer_base<pixfmt> renderer_base; pixfmt pixf(rbuf_window()); pixfmt img_pixf(rbuf_img(0)); renderer_base rb(pixf); rb.clear(agg::rgba(1.0, 1.0, 1.0)); agg::trans_affine src_mtx; src_mtx *= agg::trans_affine_translation(-img_width/2, -img_height/2); src_mtx *= agg::trans_affine_rotation(m_angle.value() * agg::pi / 180.0); src_mtx *= agg::trans_affine_translation(img_width/2 + 10, img_height/2 + 10 + 40); src_mtx *= trans_affine_resizing(); agg::trans_affine img_mtx; img_mtx *= agg::trans_affine_translation(-img_width/2, -img_height/2); img_mtx *= agg::trans_affine_rotation(m_angle.value() * agg::pi / 180.0); img_mtx *= agg::trans_affine_scaling(m_scale.value()); img_mtx *= agg::trans_affine_translation(img_width/2 + 10, img_height/2 + 10 + 40); img_mtx *= trans_affine_resizing(); img_mtx.invert(); typedef agg::span_allocator<agg::rgba8> span_alloc_type; span_alloc_type sa; typedef agg::span_interpolator_adaptor<agg::span_interpolator_linear<>, periodic_distortion> interpolator_type; periodic_distortion* dist = 0; distortion_wave dist_wave; distortion_swirl dist_swirl; distortion_wave_swirl dist_wave_swirl; distortion_swirl_wave dist_swirl_wave; switch(m_distortion.cur_item()) { case 0: dist = &dist_wave; break; case 1: dist = &dist_swirl; break; case 2: dist = &dist_wave_swirl; break; case 3: dist = &dist_swirl_wave; break; } dist->period(m_period.value()); dist->amplitude(m_amplitude.value()); dist->phase(m_phase); double cx = m_center_x; double cy = m_center_y; img_mtx.transform(&cx, &cy); dist->center(cx, cy); interpolator_type interpolator(img_mtx, *dist); typedef agg::image_accessor_clip<pixfmt> img_source_type; img_source_type img_src(img_pixf, agg::rgba(1,1,1)); /* // Version without filtering (nearest neighbor) //------------------------------------------ typedef agg::span_image_filter_rgb_nn<img_source_type, interpolator_type> span_gen_type; span_gen_type sg(img_src, interpolator); //------------------------------------------ */ // Version with "hardcoded" bilinear filter and without // image_accessor (direct filter, the old variant) //------------------------------------------ typedef agg::span_image_filter_rgb_bilinear_clip<pixfmt, interpolator_type> span_gen_type; span_gen_type sg(img_pixf, agg::rgba(1,1,1), interpolator); //------------------------------------------ /* // Version with arbitrary 2x2 filter //------------------------------------------ typedef agg::span_image_filter_rgb_2x2<img_source_type, interpolator_type> span_gen_type; agg::image_filter<agg::image_filter_kaiser> filter; span_gen_type sg(img_src, interpolator, filter); //------------------------------------------ */ /* // Version with arbitrary filter //------------------------------------------ typedef agg::span_image_filter_rgb<img_source_type, interpolator_type> span_gen_type; agg::image_filter<agg::image_filter_spline36> filter; span_gen_type sg(img_src, interpolator, filter); //------------------------------------------ */ agg::rasterizer_scanline_aa<> ras; agg::scanline_u8 sl; double r = img_width; if(img_height < r) r = img_height; agg::ellipse ell(img_width / 2.0, img_height / 2.0, r / 2.0 - 20.0, r / 2.0 - 20.0, 200); agg::conv_transform<agg::ellipse> tr(ell, src_mtx); ras.add_path(tr); agg::render_scanlines_aa(ras, sl, rb, sa, sg); src_mtx *= ~trans_affine_resizing(); src_mtx *= agg::trans_affine_translation(img_width - img_width/10, 0.0); src_mtx *= trans_affine_resizing(); ras.add_path(tr); agg::render_scanlines_aa_solid(ras, sl, rb, agg::rgba8(0,0,0)); typedef agg::span_gradient<agg::rgba8, interpolator_type, agg::gradient_circle, color_array_type> gradient_span_gen; agg::gradient_circle gradient_function; color_array_type gradient_colors(m_gradient_colors); gradient_span_gen span_gradient(interpolator, gradient_function, gradient_colors, 0, 180); agg::trans_affine gr1_mtx; gr1_mtx *= agg::trans_affine_translation(-img_width/2, -img_height/2); gr1_mtx *= agg::trans_affine_scaling(0.8); gr1_mtx *= agg::trans_affine_rotation(m_angle.value() * agg::pi / 180.0); gr1_mtx *= agg::trans_affine_translation(img_width - img_width/10 + img_width/2 + 10, img_height/2 + 10 + 40); gr1_mtx *= trans_affine_resizing(); agg::trans_affine gr2_mtx; gr2_mtx *= agg::trans_affine_rotation(m_angle.value() * agg::pi / 180.0); gr2_mtx *= agg::trans_affine_scaling(m_scale.value()); gr2_mtx *= agg::trans_affine_translation(img_width - img_width/10 + img_width/2 + 10 + 50, img_height/2 + 10 + 40 + 50); gr2_mtx *= trans_affine_resizing(); gr2_mtx.invert(); cx = m_center_x + img_width - img_width/10; cy = m_center_y; gr2_mtx.transform(&cx, &cy); dist->center(cx, cy); interpolator.transformer(gr2_mtx); agg::conv_transform<agg::ellipse> tr2(ell, gr1_mtx); ras.add_path(tr2); agg::render_scanlines_aa(ras, sl, rb, sa, span_gradient); agg::render_ctrl(ras, sl, rb, m_angle); agg::render_ctrl(ras, sl, rb, m_scale); agg::render_ctrl(ras, sl, rb, m_amplitude); agg::render_ctrl(ras, sl, rb, m_period); agg::render_ctrl(ras, sl, rb, m_distortion); } virtual void on_mouse_button_down(int x, int y, unsigned flags) { if(flags) { m_center_x = x; m_center_y = y; force_redraw(); } } virtual void on_mouse_move(int x, int y, unsigned flags) { if(flags & 1) { m_center_x = x; m_center_y = y; force_redraw(); } } virtual void on_idle() { m_phase += 15.0 * agg::pi / 180.0; if(m_phase > agg::pi * 200.0) m_phase -= agg::pi * 200.0; force_redraw(); } }; int agg_main(int argc, char* argv[]) { the_application app(agg::pix_format_bgr24, flip_y); app.caption("Image and Gradient Distortions"); const char* img_name = "spheres"; if(argc >= 2) img_name = argv[1]; if(!app.load_img(0, img_name)) { char buf[256]; if(strcmp(img_name, "spheres") == 0) { sprintf(buf, "File not found: %s%s. Download http://www.antigrain.com/%s%s\n" "or copy it from another directory if available.", img_name, app.img_ext(), img_name, app.img_ext()); } else { sprintf(buf, "File not found: %s%s", img_name, app.img_ext()); } app.message(buf); return 1; } if(app.init(app.rbuf_img(0).width() + 300, app.rbuf_img(0).height() + 40 + 20, agg::window_resize)) { app.wait_mode(false); return app.run(); } return 0; } |