VOXELFONT: option to mirror y axis

src/modules/voxelfont/VoxelFont.cpp

@@ -128,6 +128,7 @@ bool VoxelFont::renderGlyphs(const char* string) {
 	int spaceWidth = 0;
 	int chars = 0;
 	const bool mergeQuads = _optionMask & MergeQuads;
+	const bool originUpperLeft = _optionMask & OriginUpperLeft;
 	for (int c = core::utf8::next(s); c != -1; c = core::utf8::next(s)) {
 		int w;
 		int h;
@@ -156,8 +157,14 @@ bool VoxelFont::renderGlyphs(const char* string) {
 		for (int y = 0; y < h; ++y) {
 			for (int x = 0; x < w; ++x) {
 				if (bitmap[y * w + x] >= 25) {
+					int finalY;
+					if (originUpperLeft) {
+						finalY = y;
+					} else {
+						finalY = regionH - y;
+					}
 					for (int i = 0; i < _thickness; ++i) {
-						v.setVoxel(glm::ivec3(x + ix0, regionH - y, i), voxel);
+						v.setVoxel(glm::ivec3(x + ix0, finalY, i), voxel);
 					}
 				}
 			}

src/modules/voxelfont/VoxelFont.h

@@ -47,6 +47,7 @@ public:
 	~VoxelFont();
 
 	static const uint8_t MergeQuads        = 1 << 0;
+	static const uint8_t OriginUpperLeft   = 1 << 1;
 
 	bool init(const char* font, int fontSize, int thickness, uint8_t optionMask, const char* glyphs);
 	void shutdown();

src/modules/voxelrender/VoxelFontRenderer.h

@@ -41,7 +41,7 @@ private:
 	const int _depth;
 	const uint8_t _optionMask;
 public:
-	VoxelFontRenderer(int fontSize, int depth = 4, uint8_t optionMask = voxel::VoxelFont::MergeQuads);
+	VoxelFontRenderer(int fontSize, int depth = 4, uint8_t optionMask = voxel::VoxelFont::OriginUpperLeft | voxel::VoxelFont::MergeQuads);
 
 	bool init() override;
 	void shutdown() override;

src/tests/testvoxelfont/TestVoxelFont.cpp

@@ -131,6 +131,9 @@ void TestVoxelFont::onRenderUI() {
 	if (ImGui::Checkbox("Merge Quads", &_mergeQuads)) {
 		changeFontSize(0);
 	}
+	if (ImGui::Checkbox("Upper left (origin)", &_upperLeft)) {
+		changeFontSize(0);
+	}
 	ImGui::Text("Font vertices: %i, indices: %i", _vertices, _indices);
 	ImGui::Text("Ctrl/+ Ctrl/-: Change font thickness");
 	ImGui::Text("Space: Toggle merge quads");

src/tests/testvoxelfont/TestVoxelFont.h

@@ -20,6 +20,7 @@ private:
 	int _fontSize = 20;
 	int _thickness = 4;
 	bool _mergeQuads = false;
+	bool _upperLeft = false;
 
 	int _vertices = 0;
 	int _indices = 0;