First Commit

3rdparty/plutosvg/examples/emoji2png.c

@@ -0,0 +1,56 @@
+#include <plutosvg.h>
+
+#include <stdio.h>
+
+#include <ft2build.h>
+#include FT_FREETYPE_H
+#include FT_MODULE_H
+
+int main(int argc, char* argv[])
+{
+    if(argc != 4) {
+        fprintf(stderr, "Usage: emoji2png font codepoint size\n");
+        return -1;
+    }
+
+    const char* filename = argv[1];
+    FT_ULong codepoint = strtoul(argv[2], NULL, 16);
+    FT_ULong size = strtoul(argv[3], NULL, 10);
+
+    FT_Library library = NULL;
+    FT_Face face = NULL;
+    FT_Error error = FT_Err_Ok;
+
+    if((error = FT_Init_FreeType(&library)))
+        goto cleanup;
+    if((error = FT_Property_Set(library, "ot-svg", "svg-hooks", plutosvg_ft_svg_hooks())))
+        goto cleanup;
+    if((error = FT_New_Face(library, filename, 0, &face)))
+        goto cleanup;
+    if((error = FT_Set_Pixel_Sizes(face, 0, size)))
+        goto cleanup;
+    if((error = FT_Load_Char(face, codepoint, FT_LOAD_RENDER | FT_LOAD_COLOR))) {
+        goto cleanup;
+    }
+
+    if(face->glyph->bitmap.pixel_mode == FT_PIXEL_MODE_BGRA) {
+        plutovg_surface_t* surface = plutovg_surface_create_for_data(
+            face->glyph->bitmap.buffer, face->glyph->bitmap.width,
+            face->glyph->bitmap.rows, face->glyph->bitmap.pitch
+        );
+
+        char name[64];
+        sprintf(name, "emoji-%lx.png", codepoint);
+        plutovg_surface_write_to_png(surface, name);
+        plutovg_surface_destroy(surface);
+        fprintf(stdout, "Generated Emoji: %s\n", name);
+    } else {
+        fprintf(stderr, "The glyph for codepoint %lx is not in color mode.\n", codepoint);
+    }
+
+cleanup:
+    if(error) fprintf(stderr, "freetype error: %s\n", FT_Error_String(error));
+    FT_Done_Face(face);
+    FT_Done_FreeType(library);
+    return error;
+}