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Commit 683119a7 authored by Felix Morgner's avatar Felix Morgner
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week12: add exercises

parent b58261fa
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week12/exercise_solutions/w12_solution_01_JuliaJNA/.classpath 0 → 100644
View file @ 683119a7
<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
<classpathentry kind="src" path="src"/>
<classpathentry kind="lib" path="lib/jna-5.5.0.jar"/>
<classpathentry kind="output" path="bin"/>
</classpath>
week12/exercise_solutions/w12_solution_01_JuliaJNA/.project 0 → 100644
View file @ 683119a7
<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
<name>w12_solution_01_JuliaJNA</name>
<comment></comment>
<projects>
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week12/exercise_solutions/w12_solution_01_JuliaJNA/src/ch/hsr/cpla/Julia.java 0 → 100644
View file @ 683119a7
package ch.hsr.cpla;
import java.util.Arrays;
import java.util.List;
import com.sun.jna.Library;
import com.sun.jna.Native;
import com.sun.jna.Pointer;
import com.sun.jna.Structure;
import com.sun.jna.ptr.IntByReference;
public interface Julia extends Library {
Julia INSTANCE = (Julia) Native.load("julia", Julia.class);
public static class Window extends Structure implements Structure.ByValue {
public double x, y, size;
public Window(double x, double y, double size) {
this.x = x;
this.y = y;
this.size = size;
}
@Override
protected List<String> getFieldOrder() {
return Arrays.asList(new String[] { "x", "y", "size" });
}
}
public static class Image extends Pointer {
public Image(int size) {
super(Pointer.nativeValue(INSTANCE.createImage(size)));
}
public void dispose() {
INSTANCE.disposeImage(this);
}
public int getSize() {
return INSTANCE.getSize(this);
}
public byte[] getBitmapData() {
IntByReference size = new IntByReference();
Pointer dumped = INSTANCE.dump(this, size);
byte[] data = dumped.getByteArray(0, size.getValue());
Native.free(Pointer.nativeValue(dumped));
return data;
}
}
Pointer createImage(int size);
void disposeImage(Image image);
int getSize(Image image);
Pointer dump(Image image, IntByReference size);
void render(Image image, Window window, double exponent, double kReal, double kImaginary, int iterations);
}
week12/exercise_solutions/w12_solution_01_JuliaJNA/src/ch/hsr/cpla/JuliaJNA.java 0 → 100644
View file @ 683119a7
package ch.hsr.cpla;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import ch.hsr.cpla.Julia.Image;
public class JuliaJNA {
static ImageViewer imageViewer;
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> {
imageViewer = new ImageViewer(500);
imageViewer.setVisible(true);
});
}
public static class ImageViewer extends JFrame {
private static final long serialVersionUID = -9127187659667855390L;
public ImageViewer(int size) {
this.setTitle("CplA Image Viewer");
this.setSize(size, size);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Image image = new Julia.Image(size);
Julia.INSTANCE.render(image, new Julia.Window(0.0, 0.0, 1.0), 2.0, 0.0, -1.0, 100);
byte[] rendered = image.getBitmapData();
image.dispose();
BufferedImage bitmap = null;
try {
bitmap = ImageIO.read(new ByteArrayInputStream(rendered));
} catch (IOException e) {
e.printStackTrace();
}
JPanel panel = new JPanel();
if (image != null) {
JLabel imageView = new JLabel(new ImageIcon(bitmap));
panel.add(imageView);
}
this.add(panel);
}
}
}
week12/exercise_solutions/w12_solution_01_JuliaLib/.cproject 0 → 100644
View file @ 683119a7
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week12/exercise_solutions/w12_solution_01_JuliaLib/.project 0 → 100644
View file @ 683119a7
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week12/exercise_solutions/w12_solution_01_JuliaLib/Bmp.cpp 0 → 100644
View file @ 683119a7
#include "Bmp.h"
#include <cstddef>
#include <vector>
#include <cstring>
#include <cmath>
#include <algorithm>
#include <iterator>
#include <utility>
#include <cassert>
namespace julia {
namespace {
template<typename ValueType>
void write(std::vector<std::byte> & buffer, std::size_t offset, ValueType const &value) {
std::memcpy(buffer.data() + offset, &value, sizeof(ValueType));
}
}
auto constexpr bmp_file_header_size { 14 };
auto constexpr bmp_image_header_size { static_cast<std::uint32_t>(40) };
auto constexpr bmp_file_header_magic { "BM" };
auto constexpr bmp_file_header_magic_offset { 0 };
auto constexpr bmp_file_size_offset { bmp_file_header_magic_offset + 2 };
auto constexpr bmp_data_offset_offset { bmp_file_size_offset + 8 };
auto constexpr bmp_image_header_size_offset { bmp_file_header_size };
auto constexpr bmp_image_width_offset { bmp_image_header_size_offset + sizeof(std::uint32_t) };
auto constexpr bmp_image_height_offset { bmp_image_width_offset + sizeof(std::uint32_t) };
auto constexpr bmp_image_planes_offset { bmp_image_height_offset + sizeof(std::uint32_t) };
auto constexpr bmp_image_bits_per_pixel_offset { bmp_image_planes_offset + sizeof(std::uint16_t) };
auto constexpr bmp_image_compression_offset { bmp_image_bits_per_pixel_offset + sizeof(std::uint16_t) };
auto constexpr bmp_image_size_offset { bmp_image_compression_offset + sizeof(std::uint32_t) };
auto constexpr bmp_image_x_pixels_per_meter_offset { bmp_image_size_offset + sizeof(std::uint32_t) };
auto constexpr bmp_image_y_pixels_per_meter_offset { bmp_image_x_pixels_per_meter_offset + sizeof(std::uint32_t) };
auto constexpr bmp_image_color_map_entry_count_offset { bmp_image_y_pixels_per_meter_offset + sizeof(std::uint32_t) };
auto constexpr bmp_image_significant_colors_count_offset { bmp_image_color_map_entry_count_offset + sizeof(std::uint32_t) };
auto constexpr bmp_data_offset { bmp_file_header_size + bmp_image_header_size };
Bmp::Bmp(std::uint32_t size) :
m_size { size }, m_pixel_data { size * size } {
}
void Bmp::put(Pixel pixel) noexcept {
assert(pixel.x < m_size);
assert(pixel.y < m_size);
auto pixel_index = pixel.x + m_size * pixel.y;
m_pixel_data[pixel_index] = pixel;
}
std::uint32_t Bmp::size() const noexcept {
return m_size;
}
std::vector<std::byte> Bmp::dump() {
auto const pixel_data_size { m_size * m_size * 3 };
auto buffer = std::vector<std::byte> { bmp_file_header_size + bmp_image_header_size + pixel_data_size };
write_file_header(buffer);
write_image_header(buffer);
write_pixel_data(buffer);
return buffer;
}
void Bmp::write_file_header(std::vector<std::byte> &buffer) const noexcept {
std::memcpy(buffer.data(), bmp_file_header_magic, 2);
auto const file_size = std::uint32_t { bmp_file_header_size + bmp_image_header_size + 4 * m_size * m_size };
write(buffer, bmp_file_size_offset, file_size);
auto const data_offset = std::uint32_t { bmp_file_header_size + bmp_image_header_size };
write(buffer, bmp_data_offset_offset, data_offset);
}
void Bmp::write_image_header(std::vector<std::byte> &buffer) const noexcept {
write(buffer, bmp_image_header_size_offset, bmp_image_header_size);
write(buffer, bmp_image_width_offset, m_size);
write(buffer, bmp_image_height_offset, m_size);
write(buffer, bmp_image_planes_offset, static_cast<std::uint16_t>(1));
write(buffer, bmp_image_bits_per_pixel_offset, static_cast<std::uint16_t>(24));
write(buffer, bmp_image_compression_offset, std::uint32_t { });
write(buffer, bmp_image_size_offset, static_cast<std::uint32_t>((m_size + (m_size % 4)) * m_size));
auto ppm = static_cast<std::uint32_t>(std::lround(72.0 * 39.3701));
write(buffer, bmp_image_x_pixels_per_meter_offset, ppm);
write(buffer, bmp_image_y_pixels_per_meter_offset, ppm);
write(buffer, bmp_image_color_map_entry_count_offset, std::uint32_t { });
write(buffer, bmp_image_significant_colors_count_offset, std::uint32_t { });
}
void Bmp::write_pixel_data(std::vector<std::byte> &buffer) const noexcept {
auto const row_length = m_size * 3 + m_size % 4;
for_each(cbegin(m_pixel_data), cend(m_pixel_data), [&](auto pixel) {
std::swap(pixel.color.red, pixel.color.blue);
auto const row = m_size - 1 - pixel.y;
auto const pixel_offset = bmp_data_offset + row * row_length + pixel.x * 3;
write(buffer, pixel_offset, pixel.color);
});
}
}
week12/exercise_solutions/w12_solution_01_JuliaLib/Bmp.h 0 → 100644
View file @ 683119a7
#ifndef INCLUDE_BMP_H_
#define INCLUDE_BMP_H_
#include <cstddef>
#include <cstdint>
#include <vector>
namespace julia {
struct Pixel {
std::uint32_t x{};
std::uint32_t y{};
struct {
std::uint8_t red{};
std::uint8_t green{};
std::uint8_t blue{};
} color{};
};
struct Bmp {
explicit Bmp(std::uint32_t size);
void put(Pixel pixel) noexcept;
std::uint32_t size() const noexcept;
std::vector<std::byte> dump();
private:
void write_file_header(std::vector<std::byte> &buffer) const noexcept;
void write_image_header(std::vector<std::byte> &buffer) const noexcept;
void write_pixel_data(std::vector<std::byte> & buffer) const noexcept;
std::uint32_t m_size;
std::vector<Pixel> m_pixel_data;
};
}
#endif /* INCLUDE_BMP_H_ */
week12/exercise_solutions/w12_solution_01_JuliaLib/Julia.cpp 0 → 100644
View file @ 683119a7
#include "Julia.h"
#include <array>
#include <complex>
namespace julia {
using rgb_color = decltype(Pixel::color);
//@formatter:off
constexpr auto palette = std::array{
rgb_color{ 66, 30, 15 },
rgb_color{ 25, 7, 26 },
rgb_color{ 9, 1, 47 },
rgb_color{ 4, 4, 73 },
rgb_color{ 0, 7, 100 },
rgb_color{ 12, 44, 138 },
rgb_color{ 24, 82, 177 },
rgb_color{ 57, 125, 209 },
rgb_color{ 134, 181, 229 },
rgb_color{ 211, 236, 248 },
rgb_color{ 241, 233, 191 },
rgb_color{ 248, 201, 95 },
rgb_color{ 255, 170, 0 },
rgb_color{ 204, 128, 0 },
rgb_color{ 153, 87, 0 },
rgb_color{ 106, 52, 3 },
};
//@formatter:on
void render(Bmp &image, Window window, double exponent, std::complex<double> k, int iterations) {
auto const upper_left = std::complex<double> { window.size - window.center.x, window.size + window.center.y };
auto const lower_right = std::complex<double> { -window.size - window.center.x, -window.size + window.center.y };
auto const x_scaling_factor = (upper_left.real() - lower_right.real()) / (image.size() - 1);
auto const y_scaling_factor = (upper_left.imag() - lower_right.imag()) / (image.size() - 1);
for (auto y { 0u }; y < image.size(); ++y) {
auto c = std::complex<double> { 0.0, upper_left.imag() - y * y_scaling_factor };
for (auto x { 0u }; x < image.size(); ++x) {
c.real(lower_right.real() + x * x_scaling_factor);
auto z = c;
image.put([&]() -> Pixel {
for (auto n { 0 }; n < iterations; ++n) {
if (abs(z) > 2) {
return {x, y, palette[n % palette.size()]};
}
z = pow(z, exponent) + k;
}
return {x, y};
}());
}
}
}
}
week12/exercise_solutions/w12_solution_01_JuliaLib/Julia.h 0 → 100644
View file @ 683119a7
#ifndef INCLUDE_JULIA_H_
#define INCLUDE_JULIA_H_
#include "Bmp.h"