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Imagey Working

main
Brett 2022-10-15 18:59:13 -04:00
parent 1aa3897528
commit bdce7b1ff8
13 changed files with 78 additions and 22 deletions
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@ -1,3 +1,3 @@
Start testing: Oct 15 16:34 EDT
Start testing: Oct 15 16:47 EDT
----------------------------------------------------------
End testing: Oct 15 16:34 EDT
End testing: Oct 15 16:47 EDT

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@ -41,14 +41,14 @@ namespace Raytracing {
static inline std::string toLowerCase(const std::string& s){
std::stringstream str;
std::for_each(s.begin(), s.end(), [&str](unsigned char ch) {
str << std::tolower(ch);
str << (char) std::tolower(ch);
});
return str.str();
}
static inline std::string toUpperCase(const std::string& s){
std::stringstream str;
std::for_each(s.begin(), s.end(), [&str](unsigned char ch) {
str << std::toupper(ch);
str << (char) std::toupper(ch);
});
return str.str();
}

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Step 2/src/image/image.cpp
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@ -5,6 +5,7 @@
#include "image/image.h"
#include <ios>
#include <fstream>
#define STB_IMAGE_WRITE_IMPLEMENTATION
#include <image/stb_image_write.h>
namespace Raytracing {
@ -17,7 +18,7 @@ namespace Raytracing {
pixelData = new vec4[image.width * image.height];
for (int i = 0; i < image.width; i++) {
for (int j = 0; j < image.height; j++) {
this->setPixelColor(i, j, image.pixelData[i * image.width + j]);
this->setPixelColor(i, j, image.pixelData[i * image.height + j]);
}
}
}
@ -25,19 +26,19 @@ namespace Raytracing {
int Image::getPixelR(int x, int y) const {
// values are stored as a floating point number [0, 1)
// but most formats want an int [0, 255]
return (int) (255.999 * getPixelColor(x, y).r());
return int(255.0 * getPixelColor(x, y).r());
}
int Image::getPixelG(int x, int y) const {
return (int) (255.999 * getPixelColor(x, y).g());
return int(255.0 * getPixelColor(x, y).g());
}
int Image::getPixelB(int x, int y) const {
return (int) (255.999 * getPixelColor(x, y).b());
return int(255.0 * getPixelColor(x, y).b());
}
int Image::getPixelA(int x, int y) const {
return (int) (255.999 * getPixelColor(x, y).a());
return int(255.0 * getPixelColor(x, y).a());
}
Image::~Image() {
@ -46,17 +47,17 @@ namespace Raytracing {
void ImageOutput::write(const std::string& file, const std::string& formatExtension) {
auto lowerExtension = Raytracing::String::toLowerCase(formatExtension);
auto fullFile = file + lowerExtension;
auto fullFile = file + "." + lowerExtension;
if (!lowerExtension.ends_with("hdr")) {
// unfortunately we do have to put the data into a format that STB can read
int data[image.getWidth() * image.getHeight() * 3];
unsigned char data[image.getWidth() * image.getHeight() * 3];
int pixelIndex = 0;
for (int i = 0; i < image.getWidth(); i++) {
for (int j = 0; j < image.getHeight(); j++) {
data[pixelIndex++] = image.getPixelR(i, j);
data[pixelIndex++] = image.getPixelR(i, j);
for (int j = image.getHeight()-1; j >= 0; j--) {
for (int i = 0; i < image.getWidth(); i++) {
data[pixelIndex++] = image.getPixelR(i, j);
data[pixelIndex++] = image.getPixelG(i, j);
data[pixelIndex++] = image.getPixelB(i, j);
}
}
@ -67,7 +68,9 @@ namespace Raytracing {
if (lowerExtension.ends_with("bmp")) {
stbi_write_bmp(fullFile.c_str(), image.getWidth(), image.getHeight(), 3, data);
} else if (lowerExtension.ends_with("png")) {
stbi_write_png(fullFile.c_str(), image.getWidth(), image.getHeight(), 3, data, 3 * sizeof(int));
// stride here isn't clearly defined in the docs for some reason,
// but it's just the image's width times the number of channels
stbi_write_png(fullFile.c_str(), image.getWidth(), image.getHeight(), 3, data, image.getWidth() * 3);
} else if (lowerExtension.ends_with("jpg")) {
stbi_write_jpg(fullFile.c_str(), image.getWidth(), image.getHeight(), 3, data, 90);
} else

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@ -49,15 +49,11 @@ int main(int argc, char** args) {
Raytracing::Image image(512, 512);
for (int i = 0; i < image.getWidth(); i++){
for (int j = 0; j < image.getHeight(); j++){
image.setPixelColor(i, j, Raytracing::vec4(double(i) / double(image.getWidth()-1), double(j) / double(image.getHeight()-1), 0.25, 1.0));
}
}
Raytracing::ImageOutput imageOutput(image);
imageOutput.write("hello", "png");
imageOutput.write("test", "hdr");
return 0;
}