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Diffstat (limited to 'tests/make_bitmap/example1.c')
| -rw-r--r-- | tests/make_bitmap/example1.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/tests/make_bitmap/example1.c b/tests/make_bitmap/example1.c new file mode 100644 index 000000000..9bc61216d --- /dev/null +++ b/tests/make_bitmap/example1.c @@ -0,0 +1,98 @@ +// This example uses the FreeType rendering library to produce +// LCD rendered bitmap (RGB) for the glyphs of a font +// Also gives the MurmurHash3 hash value of the bitmap rendered. + +#include "bitmap.h" + +int main(int argc, char const *argv[]) +{ + FT_Library library; + FT_Face face; + FT_GlyphSlot slot; + FT_Bitmap* bitmap; + FT_Error error; + + const char* font_file; // Arguments + FT_UInt32 size; + FT_UInt glyph_index; + const char* character; + + if (argc != 4) + { + printf("\nTo render a RGB bitmap of a glyph to be displayed on an \n"); + printf("LCD surface and to generate the 128bit MurmurHash3 hash \n\n"); + + printf("Filter used is FT_LCD_FILTER_DEFAULT\n\n"); + + printf("Usage ./<exe> <font_file> <pt_size> <character>\n\n"); + + exit(0); + } + + font_file = argv[1]; + size = atoi(argv[2]); + character = argv[3]; + + error = FT_Init_FreeType( &library ); + if(error){ + printf("Error while initialising library\n"); + } + + error = FT_Library_SetLcdFilter( library, + FT_LCD_FILTER_DEFAULT ); + if(error){ + printf("Error while setting LCD filter\n"); + } + + error = FT_New_Face( library, + font_file, + 0, + &face ); + if(error){ + printf("Error loading new face\n"); + } + + error = FT_Set_Char_Size( face, + size * 64, + 0, + 100, + 0 ); + if(error){ + printf("Error setting character size\n"); + } + + glyph_index = FT_Get_Char_Index( face, *character ); + + slot = face->glyph; + + error = FT_Load_Glyph( face, + glyph_index, + FT_LOAD_NO_BITMAP | FT_LOAD_TARGET_LCD ); + if(error){ + printf("Error loading glyph\n"); + } + + FT_Render_Glyph( slot, + FT_RENDER_MODE_LCD); + if(error){ + printf("Error rendering the glyph\n"); + } + + bitmap = &slot->bitmap; + + Write_Bitmap_Header(bitmap); + Write_Bitmap_Data_LCD_RGB(bitmap); + + HASH_128 * murmur = (HASH_128 *) malloc(sizeof(HASH_128)) ; + murmur = Generate_Hash_x64_128(bitmap,murmur); // using the x64_128 function of the hash + + printf("%08x %08x %08x %08x\n", murmur->hash[0], // Print hash + murmur->hash[1], + murmur->hash[2], + murmur->hash[3]); + + FT_Done_Face ( face ); + FT_Done_FreeType( library ); + + return 0; +}
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