Define structs and data types

.clang-format

@@ -6,8 +6,8 @@ BreakBeforeBraces: Attach
 ColumnLimit: 160
 SpaceAfterTemplateKeyword: true
 Standard: c++20
-TabWidth: 4
-IndentWidth: 4
+TabWidth: 2
+IndentWidth: 2
 UseTab: Always
 AllowShortEnumsOnASingleLine: true
 AllowShortCaseLabelsOnASingleLine: true

.editorconfig

@@ -1,7 +1,7 @@
 [*]
 insert_final_newline = true
 charset = utf-8
-indent_size = 4
+indent_size = 2
 indent_style = tab
 # Optional: git will commit as lf, this will only affect local files
 end_of_line = lf

CMakeLists.txt

@@ -8,6 +8,8 @@ project(image-exporter)
 
 add_executable(${PROJECT_NAME})
 target_sources(${PROJECT_NAME} PRIVATE
+  src/export.h
+  src/export.cpp
   src/main.cpp
 )
 

src/export.cpp

@@ -0,0 +1 @@
+#include "export.h"

src/export.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#include <vector>
+#include <span>
+#include <cstdint>
+
+using std::uint8_t;
+using std::uint32_t;
+
+struct Rgba
+{
+	uint8_t r{0}, g{0}, b{0}, a{0};
+};
+
+struct Extent
+{
+	uint32_t width{0}, height{0};
+};
+
+struct Image
+{
+	std::vector<Rgba> pixels;
+	Extent extent;
+};
+
+Image upscale(std::span<Rgba const> input, uint32_t scale);

src/main.cpp

@@ -1 +1,11 @@
-int main() {}
+#include "export.h"
+
+constexpr uint32_t image_width_v = 512;
+constexpr uint32_t image_height_v = 512;
+constexpr uint32_t input_extent_v = 1;
+constexpr uint32_t output_extent_v = 32;
+
+int main()
+{
+	return 0;
+}