79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
#include "./face.h"
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#include <assert.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <ft2build.h>
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#include FT_ERRORS_H
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#include FT_FREETYPE_H
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#include "./context.h"
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void glyphas_face_initialize_from_file(
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glyphas_face_t* face,
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const glyphas_context_t* ctx,
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const char* path,
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size_t index) {
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assert(face != NULL);
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assert(ctx != NULL);
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*face = (typeof(*face)) {0};
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const FT_Error err = FT_New_Face(ctx->ft, path, index, &face->ft);
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if (err != FT_Err_Ok) {
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fprintf(stderr,
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"failed to load font file '%s': %s\n", path, FT_Error_String(err));
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abort();
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}
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}
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void glyphas_face_initialize_from_buffer(
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glyphas_face_t* face,
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const glyphas_context_t* ctx,
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const void* data,
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size_t length,
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size_t index) {
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assert(face != NULL);
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assert(ctx != NULL);
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*face = (typeof(*face)) {0};
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const FT_Error err =
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FT_New_Memory_Face(ctx->ft, data, length, index, &face->ft);
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if (err != FT_Err_Ok) {
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fprintf(stderr,
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"failed to load font on memory: %s\n", FT_Error_String(err));
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abort();
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}
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}
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void glyphas_face_deinitialize(glyphas_face_t* face) {
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assert(face != NULL);
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FT_Done_Face(face->ft);
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}
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bool glyphas_face_set_pixel_size(
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glyphas_face_t* face, int32_t width, int32_t height) {
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assert(face != NULL);
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assert(width > 0);
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assert(height > 0);
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const FT_Error err = FT_Set_Pixel_Sizes(face->ft, width, height);
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return err == FT_Err_Ok;
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}
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bool glyphas_face_render_glyph(glyphas_face_t* face, uint64_t unicode) {
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assert(face != NULL);
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const FT_UInt index = FT_Get_Char_Index(face->ft, unicode);
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if (index == 0) return false;
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const FT_Error err = FT_Load_Glyph(face->ft, index, FT_LOAD_RENDER);
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if (err != FT_Err_Ok) return false;
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return glyphas_glyph_reset_from_ft_glyph_slot(&face->glyph, face->ft->glyph);
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}
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