multiline labels

src/graphics/Font.cpp

@@ -2,7 +2,9 @@
 #include "Texture.h"
 #include "Batch2D.h"
 
-using glm::vec4;
+inline constexpr uint GLYPH_SIZE = 16;
+inline constexpr uint MAX_CODEPAGES = 10000; // idk ho many codepages unicode has
+inline constexpr glm::vec4 SHADOW_TINT(0.0f, 0.0f, 0.0f, 1.0f);
 
 Font::Font(std::vector<std::unique_ptr<Texture>> pages, int lineHeight, int yoffset) 
     : lineHeight(lineHeight), yoffset(yoffset), pages(std::move(pages)) {
@@ -16,71 +18,78 @@ int Font::getYOffset() const {
 }
 
 int Font::getLineHeight() const {
-	return lineHeight;
+    return lineHeight;
 }
 
-bool Font::isPrintableChar(int c) {
-	switch (c){
-	case ' ':
-	case '\t':
-	case '\n':
-	case '\f':
-	case '\r':
-		return false;
-	default:
-		return true;
-	}
+bool Font::isPrintableChar(uint codepoint) const {
+    switch (codepoint){
+        case ' ':
+        case '\t':
+        case '\n':
+        case '\f':
+        case '\r':
+            return false;
+        default:
+            return true;
+    }
 }
 
-const int RES = 16;
-
 int Font::calcWidth(std::wstring text, size_t length) {
-	return std::min(text.length(), length) * 8;
+    return std::min(text.length(), length) * 8;
 }
 
 void Font::draw(Batch2D* batch, std::wstring text, int x, int y) {
-	draw(batch, text, x, y, STYLE_NONE);
+    draw(batch, text, x, y, FontStyle::none);
 }
 
-void Font::draw(Batch2D* batch, std::wstring text, int x, int y, int style) {
-	int page = 0;
-	int next = 10000;
-	int init_x = x;
-	do {
-		for (unsigned c : text){
-			if (isPrintableChar(c)){
-				int charpage = c >> 8;
-				if (charpage == page){
-				    Texture* texture = pages[charpage].get();
-				    if (texture == nullptr){
-				        texture = pages[0].get();
-				    }
-					batch->texture(texture);
+static inline void drawGlyph(Batch2D* batch, int x, int y, uint c, FontStyle style) {
+    switch (style){
+        case FontStyle::shadow:
+            batch->sprite(x+1, y+1, GLYPH_SIZE, GLYPH_SIZE, 16, c, SHADOW_TINT);
+            break;
+        case FontStyle::outline:
+            for (int oy = -1; oy <= 1; oy++){
+                for (int ox = -1; ox <= 1; ox++){
+                    if (ox || oy) {
+                        batch->sprite(x+ox, y+oy, GLYPH_SIZE, GLYPH_SIZE, 16, c, SHADOW_TINT);
+                    }
+                }
+            }
+            break;
+    }
+    batch->sprite(x, y, GLYPH_SIZE, GLYPH_SIZE, 16, c, batch->color);
+}
 
-					switch (style){
-						case STYLE_SHADOW:
-							batch->sprite(x+1, y+1, RES, RES, 16, c, vec4(0.0f, 0.0f, 0.0f, 1.0f));
-							break;
-						case STYLE_OUTLINE:
-							for (int oy = -1; oy <= 1; oy++){
-								for (int ox = -1; ox <= 1; ox++){
-									if (ox || oy)
-										batch->sprite(x+ox, y+oy, RES, RES, 16, c, vec4(0.0f, 0.0f, 0.0f, 1.0f));
-								}
-							}
-							break;
-					}
+void Font::draw(Batch2D* batch, std::wstring text, int x, int y, FontStyle style) {
+    draw(batch, std::wstring_view(text.c_str(), text.length()), x, y, style);
+}
 
-					batch->sprite(x, y, RES, RES, 16, c, batch->color);
-				}
-				else if (charpage > page && charpage < next){
-					next = charpage;
-				}
-			}
-			x += 8;//getGlyphWidth(c);
-		}
-		page = next;
-		next = 10000;
-		x = init_x;
-	} while (page < 10000);
+void Font::draw(Batch2D* batch, std::wstring_view text, int x, int y, FontStyle style) {
+    uint page = 0;
+    uint next = MAX_CODEPAGES;
+    int init_x = x;
+    do {
+        for (uint c : text){
+            if (!isPrintableChar(c)) {
+                x += 8;
+                continue;
+            }
+            int charpage = c >> 8;
+            if (charpage == page){
+                Texture* texture = pages[charpage].get();
+                if (texture == nullptr){
+                    texture = pages[0].get();
+                }
+                batch->texture(texture);
+                drawGlyph(batch, x, y, c, style);
+            }
+            else if (charpage > page && charpage < next){
+                next = charpage;
+            }
+            x += 8;//getGlyphWidth(c);
+        }
+        page = next;
+        next = MAX_CODEPAGES;
+        x = init_x;
+    } while (page < MAX_CODEPAGES);
 }