312 lines
8.9 KiB
C++
312 lines
8.9 KiB
C++
#include <stdlib.h>
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#include <ctype.h>
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#include <stdio.h>
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#include "agg_basics.h"
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#include "agg_rendering_buffer.h"
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#include "agg_rasterizer_scanline_aa.h"
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#include "agg_scanline_p.h"
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#include "agg_renderer_scanline.h"
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#include "agg_path_storage.h"
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#include "agg_conv_transform.h"
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#include "agg_conv_clip_polygon.h"
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#include "agg_bounding_rect.h"
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#include "agg_ellipse.h"
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#include "agg_trans_bilinear.h"
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#include "agg_trans_perspective.h"
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#include "ctrl/agg_rbox_ctrl.h"
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#include "platform/agg_platform_support.h"
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#include "interactive_polygon.h"
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#define AGG_BGR24
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//#define AGG_RGB24
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//#define AGG_BGRA32
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//#define AGG_RGBA32
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//#define AGG_ARGB32
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//#define AGG_ABGR32
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//#define AGG_RGB565
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//#define AGG_RGB555
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#include "pixel_formats.h"
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enum flip_y_e { flip_y = true };
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agg::rasterizer_scanline_aa<> g_rasterizer;
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agg::scanline_p8 g_scanline;
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agg::path_storage g_path;
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agg::srgba8 g_colors[100];
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unsigned g_path_idx[100];
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unsigned g_npaths = 0;
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double g_x1 = 0;
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double g_y1 = 0;
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double g_x2 = 0;
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double g_y2 = 0;
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double g_base_dx = 0;
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double g_base_dy = 0;
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double g_angle = 0;
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double g_scale = 1.0;
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double g_skew_x = 0;
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double g_skew_y = 0;
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int g_nclick = 0;
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unsigned parse_lion(agg::path_storage& ps, agg::srgba8* colors, unsigned* path_idx);
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void parse_lion()
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{
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g_npaths = parse_lion(g_path, g_colors, g_path_idx);
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agg::pod_array_adaptor<unsigned> path_idx(g_path_idx, 100);
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agg::bounding_rect(g_path, path_idx, 0, g_npaths, &g_x1, &g_y1, &g_x2, &g_y2);
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g_base_dx = (g_x2 - g_x1) / 2.0;
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g_base_dy = (g_y2 - g_y1) / 2.0;
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g_path.flip_x(g_x1, g_x2);
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g_path.flip_y(g_y1, g_y2);
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}
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namespace agg
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{
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}
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class the_application : public agg::platform_support
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{
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public:
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typedef agg::renderer_base<pixfmt> renderer_base;
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typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_solid;
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agg::interactive_polygon m_quad;
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agg::rbox_ctrl<color_type> m_trans_type;
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the_application(agg::pix_format_e format, bool flip_y) :
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agg::platform_support(format, flip_y),
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m_quad(4, 5.0),
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m_trans_type(420, 5.0, 420+130.0, 55.0, !flip_y)
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{
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parse_lion();
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m_quad.xn(0) = g_x1;
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m_quad.yn(0) = g_y1;
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m_quad.xn(1) = g_x2;
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m_quad.yn(1) = g_y1;
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m_quad.xn(2) = g_x2;
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m_quad.yn(2) = g_y2;
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m_quad.xn(3) = g_x1;
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m_quad.yn(3) = g_y2;
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m_trans_type.add_item("Bilinear");
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m_trans_type.add_item("Perspective");
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m_trans_type.cur_item(0);
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add_ctrl(m_trans_type);
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}
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virtual void on_init()
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{
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double dx = width() / 2.0 - (m_quad.xn(1) - m_quad.xn(0)) / 2.0;
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double dy = height() / 2.0 - (m_quad.yn(2) - m_quad.yn(0)) / 2.0;
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m_quad.xn(0) += dx;
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m_quad.yn(0) += dy;
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m_quad.xn(1) += dx;
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m_quad.yn(1) += dy;
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m_quad.xn(2) += dx;
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m_quad.yn(2) += dy;
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m_quad.xn(3) += dx;
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m_quad.yn(3) += dy;
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}
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virtual void on_draw()
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{
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pixfmt pixf(rbuf_window());
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renderer_base rb(pixf);
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renderer_solid r(rb);
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rb.clear(agg::rgba(1, 1, 1));
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g_rasterizer.clip_box(0, 0, width(), height());
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if(m_trans_type.cur_item() == 0)
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{
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agg::trans_bilinear tr(g_x1, g_y1, g_x2, g_y2, m_quad.polygon());
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if(tr.is_valid())
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{
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//--------------------------
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// Render transformed lion
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//
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agg::conv_transform<agg::path_storage,
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agg::trans_bilinear> trans(g_path, tr);
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agg::render_all_paths(g_rasterizer, g_scanline, r, trans, g_colors, g_path_idx, g_npaths);
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//--------------------------
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//--------------------------
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// Render transformed ellipse
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//
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agg::ellipse ell((g_x1 + g_x2) * 0.5, (g_y1 + g_y2) * 0.5,
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(g_x2 - g_x1) * 0.5, (g_y2 - g_y1) * 0.5,
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200);
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agg::conv_stroke<agg::ellipse> ell_stroke(ell);
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ell_stroke.width(3.0);
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agg::conv_transform<agg::ellipse,
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agg::trans_bilinear> trans_ell(ell, tr);
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agg::conv_transform<agg::conv_stroke<agg::ellipse>,
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agg::trans_bilinear> trans_ell_stroke(ell_stroke, tr);
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g_rasterizer.add_path(trans_ell);
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r.color(agg::rgba(0.5, 0.3, 0.0, 0.3));
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agg::render_scanlines(g_rasterizer, g_scanline, r);
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g_rasterizer.add_path(trans_ell_stroke);
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r.color(agg::rgba(0.0, 0.3, 0.2, 1.0));
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agg::render_scanlines(g_rasterizer, g_scanline, r);
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//--------------------------
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}
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}
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else
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{
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agg::trans_perspective tr(g_x1, g_y1, g_x2, g_y2, m_quad.polygon());
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if(tr.is_valid())
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{
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//--------------------------
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// Render transformed lion
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//
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agg::conv_transform<agg::path_storage,
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agg::trans_perspective> trans(g_path, tr);
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agg::render_all_paths(g_rasterizer, g_scanline, r, trans, g_colors, g_path_idx, g_npaths);
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//--------------------------
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//--------------------------
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// Render transformed ellipse
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//
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agg::ellipse ell((g_x1 + g_x2) * 0.5, (g_y1 + g_y2) * 0.5,
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(g_x2 - g_x1) * 0.5, (g_y2 - g_y1) * 0.5,
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200);
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agg::conv_stroke<agg::ellipse> ell_stroke(ell);
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ell_stroke.width(3.0);
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agg::conv_transform<agg::ellipse,
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agg::trans_perspective> trans_ell(ell, tr);
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agg::conv_transform<agg::conv_stroke<agg::ellipse>,
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agg::trans_perspective> trans_ell_stroke(ell_stroke, tr);
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g_rasterizer.add_path(trans_ell);
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r.color(agg::rgba(0.5, 0.3, 0.0, 0.3));
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agg::render_scanlines(g_rasterizer, g_scanline, r);
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g_rasterizer.add_path(trans_ell_stroke);
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r.color(agg::rgba(0.0, 0.3, 0.2, 1.0));
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agg::render_scanlines(g_rasterizer, g_scanline, r);
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//--------------------------
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// Testing the reverse transformations
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//agg::trans_perspective tr2(m_quad.polygon(), g_x1, g_y1, g_x2, g_y2);
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//if(tr2.is_valid())
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//{
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// double x, y;
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// x = m_quad.xn(0); y = m_quad.yn(0); tr2.transform(&x, &y);
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// g_rasterizer.move_to_d(x, y);
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// x = m_quad.xn(1); y = m_quad.yn(1); tr2.transform(&x, &y);
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// g_rasterizer.line_to_d(x, y);
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// x = m_quad.xn(2); y = m_quad.yn(2); tr2.transform(&x, &y);
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// g_rasterizer.line_to_d(x, y);
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// x = m_quad.xn(3); y = m_quad.yn(3); tr2.transform(&x, &y);
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// g_rasterizer.line_to_d(x, y);
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// r.color(agg::rgba(0.5, 0.0, 0.0, 0.5));
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// agg::render_scanlines(g_rasterizer, g_scanline, r);
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//}
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//else
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//{
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// message("Singularity...");
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//}
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}
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}
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//--------------------------
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// Render the "quad" tool and controls
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g_rasterizer.add_path(m_quad);
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r.color(agg::rgba(0, 0.3, 0.5, 0.6));
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agg::render_scanlines(g_rasterizer, g_scanline, r);
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agg::render_ctrl(g_rasterizer, g_scanline, rb, m_trans_type);
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//--------------------------
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}
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virtual void on_mouse_button_down(int x, int y, unsigned flags)
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{
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if(flags & agg::mouse_left)
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{
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if(m_quad.on_mouse_button_down(x, y))
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{
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force_redraw();
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}
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}
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}
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virtual void on_mouse_move(int x, int y, unsigned flags)
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{
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if(flags & agg::mouse_left)
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{
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if(m_quad.on_mouse_move(x, y))
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{
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force_redraw();
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}
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}
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if((flags & agg::mouse_left) == 0)
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{
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on_mouse_button_up(x, y, flags);
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}
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}
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virtual void on_mouse_button_up(int x, int y, unsigned flags)
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{
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if(m_quad.on_mouse_button_up(x, y))
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{
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force_redraw();
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}
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}
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};
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int agg_main(int argc, char* argv[])
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{
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the_application app(pix_format, flip_y);
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app.caption("AGG Example. Perspective Transformations");
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if(app.init(600, 600, agg::window_resize))
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{
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return app.run();
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}
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return 1;
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}
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