Added SetFontSizeMetric, and the example text/text_font_size_metric

examples/Makefile

@@ -660,6 +660,7 @@ TEXT = \
     text/text_font_loading \
     text/text_font_sdf \
     text/text_font_spritefont \
+    text/text_font_size_metric \
     text/text_format_text \
     text/text_inline_styling \
     text/text_input_box \

examples/text/text_font_size_metric.c

@@ -0,0 +1,74 @@
+#include "raylib.h"
+#include <stddef.h>
+
+int main(void) {
+
+    InitWindow(960, 540, "raylib [text] example - font scaling metrics");
+
+    // Some fonts need to be loaded using the Em Box scaling metric.
+    // Loading this font with the default font size metric and then drawing it to a render texture with a point filter can cause blurry rendering
+    SetFontSizeMetric(FONT_SIZE_METRIC_EM_BOX);
+
+    Font fontm5x7     = LoadFontEx("text/resources/m5x7.ttf", 16, NULL, 0);
+    Font fontm6x11    = LoadFontEx("text/resources/m6x11.ttf", 16, NULL, 0);
+    Font fontMonogram = LoadFontEx("text/resources/monogram.ttf", 16, NULL, 0);
+
+    // Other fonts can use the default Ascent scaling metric.
+    // (this was the default metric, but didn't work with some pixel fonts, so now you have the option to choose which metric to use for your font)
+    SetFontSizeMetric(FONT_SIZE_METRIC_ASCENT);
+    Font fontCenturyGothic = LoadFontEx("text/resources/centurygothic.ttf", 32, NULL, 0);
+    Font fontComicSansMS   = LoadFontEx("text/resources/Comic Sans MS.ttf", 32, NULL, 0);
+    Font fontAutography    = LoadFontEx("text/resources/Autography.ttf", 64, NULL, 0);
+
+    // Set up Render Texture
+    RenderTexture2D target = LoadRenderTexture(480, 270);
+    SetTextureFilter(target.texture, TEXTURE_FILTER_POINT);
+
+    // Application loop
+    SetTargetFPS(60);
+    
+    while(!WindowShouldClose()) {
+
+        BeginTextureMode(target);
+        ClearBackground(BLACK);
+
+        // Render fonts with Em Box scaling metric
+        DrawTextEx(fontm5x7, "m5x7", (Vector2) { 50, 50 }, 32.0f, 2, WHITE);
+        DrawTextEx(fontm6x11, "m6x11", (Vector2) { 50, 100 }, 32.0f, 2, WHITE);
+        DrawTextEx(fontMonogram, "monogram", (Vector2) { 50, 150 }, 32.0f, 2, WHITE);
+
+	// Render fonts with Ascent scaling metric
+        DrawTextEx(fontCenturyGothic, "Century Gothic", (Vector2) { 200, 50 }, 32.0f, 2, WHITE);
+        DrawTextEx(fontComicSansMS, "Comic Sans MS", (Vector2) { 200, 100 }, 32.0f, 2, WHITE);
+        DrawTextEx(fontAutography, "Autography", (Vector2) { 200, 150 }, 64.0f, 2, WHITE);
+
+        EndTextureMode();
+        
+        BeginDrawing();
+        ClearBackground(BLACK);
+        DrawTextureRec(target.texture, (Rectangle){ 0, 0, target.texture.width, -target.texture.height }, (Vector2){ 0, 0 }, WHITE);
+
+	DrawLine(180, 0, 180, 250, WHITE);
+	DrawLine(50, 30, 450, 30, WHITE);
+
+	DrawText("Em Box", 50, 0, 32, WHITE);
+	DrawText("Ascent", 200, 0, 32, WHITE);
+
+        EndDrawing();
+    }
+
+    // Cleanup
+    UnloadFont(fontm5x7);
+    UnloadFont(fontm6x11);
+    UnloadFont(fontMonogram);
+
+    UnloadFont(fontCenturyGothic);
+    UnloadFont(fontComicSansMS);
+    UnloadFont(fontAutography);
+
+    UnloadRenderTexture(target);
+
+    CloseWindow();
+
+    return 0;
+}