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module ttf
/**********************************************************************
*
* Common data for the module
*
* Copyright (c) 2021 Dario Deledda. All rights reserved.
* Use of this source code is governed by an MIT license
* that can be found in the LICENSE file.
*
* Note:
*
* TODO:
**********************************************************************/
import os
import math
// text align
pub enum Text_align {
left
center
right
justify
}
// draw style
pub enum Style {
outline
outline_aliased
filled
raw
}
/******************************************************************************
*
* DEBUG Utility
*
******************************************************************************/
const debug_flag = false
fn dprintln(txt string) {
if ttf.debug_flag {
println(txt)
}
}
/******************************************************************************
*
* Utility
*
******************************************************************************/
// transform the bitmap from one layer to color layers
fn (mut bmp BitMap) format_texture() {
r := byte(bmp.color >> 24)
g := byte((bmp.color >> 16) & 0xFF)
b := byte((bmp.color >> 8) & 0xFF)
a := byte(bmp.color & 0xFF)
b_r := byte(bmp.bg_color >> 24)
b_g := byte((bmp.bg_color >> 16) & 0xFF)
b_b := byte((bmp.bg_color >> 8) & 0xFF)
b_a := byte(bmp.bg_color & 0xFF)
// trasform buffer in a texture
x := bmp.buf
unsafe {
mut i := 0
for i < bmp.buf_size {
data := x[i]
if data > 0 {
x[i + 0] = r
x[i + 1] = g
x[i + 2] = b
// alpha
x[i + 3] = byte((a * data) >> 8)
} else {
x[i + 0] = b_r
x[i + 1] = b_g
x[i + 2] = b_b
x[i + 3] = b_a
}
i += 4
}
}
}
// write out a .ppm file
pub fn (mut bmp BitMap) save_as_ppm(file_name string) {
tmp_buf := bmp.buf
mut buf := unsafe { malloc_noscan(bmp.buf_size) }
unsafe { C.memcpy(buf, tmp_buf, bmp.buf_size) }
bmp.buf = buf
bmp.format_texture()
npixels := bmp.width * bmp.height
mut f_out := os.create(file_name) or { panic(err) }
f_out.writeln('P3') or { panic(err) }
f_out.writeln('$bmp.width $bmp.height') or { panic(err) }
f_out.writeln('255') or { panic(err) }
for i in 0 .. npixels {
pos := i * bmp.bp
unsafe {
c_r := bmp.buf[pos]
c_g := bmp.buf[pos + 1]
c_b := bmp.buf[pos + 2]
f_out.write_string('$c_r $c_g $c_b ') or { panic(err) }
}
}
f_out.close()
unsafe {
free(buf)
}
bmp.buf = tmp_buf
}
pub fn (mut bmp BitMap) get_raw_bytes() []byte {
mut f_buf := []byte{len: bmp.buf_size / 4}
mut i := 0
for i < bmp.buf_size {
unsafe {
f_buf[i >> 2] = *(bmp.buf + i)
}
i += 4
}
return f_buf
}
pub fn (mut bmp BitMap) save_raw_data(file_name string) {
os.write_file_array(file_name, bmp.get_raw_bytes()) or { panic(err) }
}
//
// Math functions
//
// integer part of x
[inline]
fn ipart(x f32) f32 {
return f32(math.floor(x))
}
[inline]
fn round(x f32) f32 {
return ipart(x + 0.5)
}
// fractional part of x
[inline]
fn fpart(x f32) f32 {
return x - f32(math.floor(x))
}
[inline]
fn rfpart(x f32) f32 {
return 1 - fpart(x)
}
/******************************************************************************
*
* Colors
*
******************************************************************************/
/*
[inline]
pub fn (mut dev BitMap) get_color(x int, y int) (int, int, int, int){
if x < 0 || x >= dev.width || y < 0 || y >= dev.height {
return 0,0,0,0
}
mut i := (x + y * dev.width)*dev.bp
unsafe{
return dev.buf[i], dev.buf[i+1], dev.buf[i+2], dev.buf[i+3]
}
}
[inline]
pub fn (mut dev BitMap) get_color_u32(x int, y int) u32{
r, g, b, a := dev.get_color(x, y)
unsafe{
return u32(r<<24) | u32(g<<16) | u32(b<<8) | u32(a)
}
}
*/
/******************************************************************************
*
* Drawing
*
******************************************************************************/
[inline]
pub fn color_multiply_alpha(c u32, level f32) u32 {
return u32(f32(c & 0xFF) * level)
}
[inline]
pub fn color_multiply(c u32, level f32) u32 {
mut r := (f32((c >> 24) & 0xFF) / 255.0) * level
mut g := (f32((c >> 16) & 0xFF) / 255.0) * level
mut b := (f32((c >> 8) & 0xFF) / 255.0) * level
mut a := (f32(c & 0xFF) / 255.0) * level
r = if r > 1.0 { 1.0 } else { r }
g = if g > 1.0 { 1.0 } else { g }
b = if b > 1.0 { 1.0 } else { b }
a = if a > 1.0 { 1.0 } else { a }
return (u32(r * 255) << 24) | (u32(g * 255) << 16) | (u32(b * 255) << 8) | u32(a * 255)
}
|
