void gl_draw_text(Scene_Camera* camera, Font* font, UChar* text, GLfloat size) {
glBindVertexArray(font->quad->vao);
glUseProgram(font->quad->shader->id);
//TODO: this bugs out when I enable depth-testing due to z-fighting
//on adjacent characters, I can probably fix it with blend mode?
glDisable(GL_DEPTH_TEST); glDisable(GL_CULL_FACE);
gl_bind_texture(font->quad->shader->id, font->page->id, 0, "diffuse");
int32_t length = u_strlen(text); UChar32 character;
for(int32_t i = 0; i < length; i++) {
U16_GET_UNSAFE(text, i, character);
gl_draw_font_glyph(camera, font, character, size);
}
glEnable(GL_DEPTH_TEST); glEnable(GL_CULL_FACE);
glBindVertexArray(0);
glUseProgram(0);
}
static void TestGetChar()
{
static UChar input[]={
/* code unit,*/
0xdc00,
0x20ac,
0xd841,
0x61,
0xd841,
0xdc02,
0xd842,
0xdc06,
0,
0xd842,
0xd7ff,
0xdc41,
0xe000,
0xd800
};
static UChar32 result[]={
/*codepoint-unsafe, codepoint-safe(not strict) codepoint-safe(strict)*/
(UChar32)0xfca10000, 0xdc00, UTF_ERROR_VALUE,
0x20ac, 0x20ac, 0x20ac,
0x12861, 0xd841, UTF_ERROR_VALUE,
0x61, 0x61, 0x61,
0x20402, 0x20402, 0x20402,
0x20402, 0x20402, 0x20402,
0x20806, 0x20806, 0x20806,
0x20806, 0x20806, 0x20806,
0x00, 0x00, 0x00,
0x203ff, 0xd842, UTF_ERROR_VALUE,
0xd7ff, 0xd7ff, 0xd7ff,
0xfc41, 0xdc41, UTF_ERROR_VALUE,
0xe000, 0xe000, 0xe000,
0x11734, 0xd800, UTF_ERROR_VALUE
};
uint16_t i=0;
UChar32 c;
uint16_t offset=0;
for(offset=0; offset<sizeof(input)/U_SIZEOF_UCHAR; offset++) {
if(0<offset && offset<sizeof(input)/U_SIZEOF_UCHAR-1){
UTF16_GET_CHAR_UNSAFE(input, offset, c);
if(c != result[i]){
log_err("ERROR: UTF16_GET_CHAR_UNSAFE failed for offset=%ld. Expected:%lx Got:%lx\n", offset, result[i], c);
}
U16_GET_UNSAFE(input, offset, c);
if(c != result[i]){
log_err("ERROR: U16_GET_CHAR_UNSAFE failed for offset=%ld. Expected:%lx Got:%lx\n", offset, result[i], c);
}
}
UTF16_GET_CHAR_SAFE(input, 0, offset, sizeof(input)/U_SIZEOF_UCHAR, c, FALSE);
if(c != result[i+1]){
log_err("ERROR: UTF16_GET_CHAR_SAFE failed for offset=%ld. Expected:%lx Got:%lx\n", offset, result[i+1], c);
}
U16_GET(input, 0, offset, sizeof(input)/U_SIZEOF_UCHAR, c);
if(c != result[i+1]){
log_err("ERROR: U16_GET failed for offset=%ld. Expected:%lx Got:%lx\n", offset, result[i+1], c);
}
UTF16_GET_CHAR_SAFE(input, 0, offset, sizeof(input)/U_SIZEOF_UCHAR, c, TRUE);
if(c != result[i+2]){
log_err("ERROR: UTF16_GET_CHAR_SAFE(strict) failed for offset=%ld. Expected:%lx Got:%lx\n", offset, result[i+2], c);
}
i=(uint16_t)(i+3);
}
}
