Restructure project sources.

src/fmri/glutils.hpp

@@ -0,0 +1,64 @@
+#pragma once
+
+#include "LayerData.hpp"
+#include "utils.hpp"
+#include "Texture.hpp"
+#include <GL/glut.h>
+#include <string_view>
+
+namespace fmri {
+    /**
+     * Create a texture from an array of data.
+     *
+     * @param data
+     * @param width
+     * @param height
+     * @param subImages Number of subimages in the original image. Sub images are rescaled individually to preserve contrast. Optional, default 1.
+     * @return A texture reference.
+     */
+    fmri::Texture loadTexture(DType const *data, int width, int height, int subImages = 1);
+
+    /**
+     * Callback handler to handle resizing windows.
+     *
+     * This function resizes the rendering viewport so everything still
+     * looks proportional.
+     *
+     * @param w new Width
+     * @param h new Height.
+     */
+    void changeWindowSize(int w, int h);
+
+    /**
+     * Draw a bitmap string at the current location.
+     *
+     * @param text The text to draw.
+     */
+    void renderText(std::string_view text, int x = 0, int y = 0);
+
+    /**
+     * Check if there are OpenGL errors and report them.
+     */
+    void checkGLErrors();
+
+    /**
+     * Slow down until the idle func is being called a reasonable amount of times.
+     */
+    void throttleIdleFunc();
+
+    void setOrthographicProjection();
+
+    void restorePerspectiveProjection();
+
+    /**
+     * Draw a series of textured tiles to the screen.
+     *
+     * This function ends up drawing GL_QUADS.
+     *
+     * @param n Number of vertices
+     * @param vertexBuffer
+     * @param textureCoords
+     * @param texture
+     */
+    void drawImageTiles(int n, const float* vertexBuffer, const float* textureCoords, const Texture& texture);
+}