From 4e550948439a6cd6f318c230ed53adfabcd2ba43 Mon Sep 17 00:00:00 2001 From: Francois Fleuret Date: Sun, 11 Sep 2016 15:51:02 +0200 Subject: [PATCH] Update. --- canvas.cc | 11 ++++++++ canvas.h | 22 +++++++++++++++ canvas_cairo.cc | 73 +++++++++++++++++++++++++++++++++++++++++++++++++ canvas_cairo.h | 33 ++++++++++++++++++++++ generate.cc | 2 +- 5 files changed, 140 insertions(+), 1 deletion(-) create mode 100644 canvas.cc create mode 100644 canvas.h create mode 100644 canvas_cairo.cc create mode 100644 canvas_cairo.h diff --git a/canvas.cc b/canvas.cc new file mode 100644 index 0000000..d536158 --- /dev/null +++ b/canvas.cc @@ -0,0 +1,11 @@ + +//////////////////////////////////////////////////////////////////// +// START_IP_HEADER // +// // +// Written by Francois Fleuret // +// Contact for comments & bug reports // +// // +// END_IP_HEADER // +//////////////////////////////////////////////////////////////////// + +#include "canvas.h" diff --git a/canvas.h b/canvas.h new file mode 100644 index 0000000..a12dc74 --- /dev/null +++ b/canvas.h @@ -0,0 +1,22 @@ + +//////////////////////////////////////////////////////////////////// +// START_IP_HEADER // +// // +// Written by Francois Fleuret // +// Contact for comments & bug reports // +// // +// END_IP_HEADER // +//////////////////////////////////////////////////////////////////// + +#ifndef CANVAS_H +#define CANVAS_H + +#include "misc.h" + +class Canvas { +public: + virtual void set_drawing_color(scalar_t r, scalar_t g, scalar_t b) = 0; + virtual void draw_polygon(int filled, int nb, scalar_t *x, scalar_t *y) = 0; +}; + +#endif diff --git a/canvas_cairo.cc b/canvas_cairo.cc new file mode 100644 index 0000000..f4c4acc --- /dev/null +++ b/canvas_cairo.cc @@ -0,0 +1,73 @@ + +//////////////////////////////////////////////////////////////////// +// START_IP_HEADER // +// // +// Written by Francois Fleuret // +// Contact for comments & bug reports // +// // +// END_IP_HEADER // +//////////////////////////////////////////////////////////////////// + +#include "canvas_cairo.h" + +static cairo_status_t write_cairo_to_file(void *closure, + const unsigned char *data, + unsigned int length) { + fwrite(data, 1, length, (FILE *) closure); + return CAIRO_STATUS_SUCCESS; +} + +CanvasCairo::CanvasCairo(scalar_t scale, int width, int height) { + const int actual_width = int(width * scale); + const int actual_height = int(height * scale); + const int depth = 4; + + _data = new unsigned char [actual_width * actual_height * depth]; + + _image = cairo_image_surface_create_for_data(_data, + CAIRO_FORMAT_RGB24, + actual_width, + actual_height, + actual_width * depth); + + _context_resource = cairo_create(_image); + + cairo_scale(_context_resource, scale, scale); + + cairo_set_source_rgb(_context_resource, 1.0, 1.0, 1.0); + // cairo_set_source_rgb(_context_resource, 0.0, 0.0, 0.0); + + cairo_rectangle(_context_resource, 0, 0, width, height); + + cairo_fill(_context_resource); +} + +CanvasCairo::~CanvasCairo() { + cairo_destroy(_context_resource); + cairo_surface_destroy(_image); + delete[] _data; +} + +void CanvasCairo::set_drawing_color(scalar_t r, scalar_t g, scalar_t b) { + cairo_set_source_rgb(_context_resource, r, g, b); +} + +void CanvasCairo::draw_polygon(int filled, int nb, scalar_t *x, scalar_t *y) { + cairo_set_line_width(_context_resource, 1.0); + cairo_move_to(_context_resource, x[0], y[0]); + for(int n = 0; n < nb; n++) { + cairo_line_to(_context_resource, x[n], y[n]); + } + cairo_close_path(_context_resource); + + if(filled) { + cairo_stroke_preserve(_context_resource); + cairo_fill(_context_resource); + } else { + cairo_stroke(_context_resource); + } +} + +void CanvasCairo::write_png(FILE *file) { + cairo_surface_write_to_png_stream(_image, write_cairo_to_file, file); +} diff --git a/canvas_cairo.h b/canvas_cairo.h new file mode 100644 index 0000000..ab1d6ba --- /dev/null +++ b/canvas_cairo.h @@ -0,0 +1,33 @@ + +//////////////////////////////////////////////////////////////////// +// START_IP_HEADER // +// // +// Written by Francois Fleuret // +// Contact for comments & bug reports // +// // +// END_IP_HEADER // +//////////////////////////////////////////////////////////////////// + +#ifndef CANVAS_CAIRO_H +#define CANVAS_CAIRO_H + +#include "canvas.h" + +#include +#include + +class CanvasCairo : public Canvas { + unsigned char *_data; + cairo_surface_t *_image; + cairo_t *_context_resource; + +public: + CanvasCairo(scalar_t scale, int width, int height); + + ~CanvasCairo(); + virtual void set_drawing_color(scalar_t r, scalar_t g, scalar_t b); + virtual void draw_polygon(int filled, int nb, scalar_t *x, scalar_t *y); + virtual void write_png(FILE *file); +}; + +#endif diff --git a/generate.cc b/generate.cc index c338a1e..6a8ee69 100644 --- a/generate.cc +++ b/generate.cc @@ -92,7 +92,7 @@ int main(int argc, char **argv) { scalar_t object_center_x = delta + (world_width - 2 * delta) * drand48(); scalar_t object_center_y = delta + (world_height - 2 * delta) * drand48(); scalar_t red, green, blue; - red = drand48() * 0.8; + red = 0.75; green = red; blue = red; delete pol; -- 2.39.5