module ttf /********************************************************************** * * BMP render module utility functions * * 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 math import gg import sokol.sgl pub struct TTF_render_Sokol { pub mut: bmp &BitMap // Base bitmap render // rendering fields sg_img C.sg_image // sokol image scale_reduct f32 = 2.0 // scale of the cpu texture for filtering device_dpi int = 72 // device DPI } /****************************************************************************** * * Render functions * ******************************************************************************/ fn (mut tf_skl TTF_render_Sokol) format_texture() { tf_skl.bmp.format_texture() } pub fn (mut tf_skl TTF_render_Sokol) create_text(in_txt string, in_font_size f32) { scale_reduct := tf_skl.scale_reduct device_dpi := tf_skl.device_dpi font_size := in_font_size //* scale_reduct // Formula: (font_size * device dpi) / (72dpi * em_unit) // scale := ((1.0 * devide_dpi )/ f32(72 * tf_skl.bmp.tf.units_per_em))* font_size scale := f32(font_size * device_dpi) / f32(72 * tf_skl.bmp.tf.units_per_em) // dprintln("Scale: $scale") tf_skl.bmp.scale = scale * scale_reduct w, h := tf_skl.bmp.get_bbox(in_txt) tf_skl.bmp.width = int(w) tf_skl.bmp.height = int((h + 8)) sz := tf_skl.bmp.width * tf_skl.bmp.height * tf_skl.bmp.bp // RAM buffer if sz > tf_skl.bmp.buf_size { if sz > 0 { free(tf_skl.bmp.buf) } dprintln('create_text Alloc: $sz bytes') tf_skl.bmp.buf = malloc(sz) tf_skl.bmp.buf_size = sz } tf_skl.bmp.init_filler() // draw the text mut y_base := int((tf_skl.bmp.tf.y_max - tf_skl.bmp.tf.y_min) * tf_skl.bmp.scale) tf_skl.bmp.set_pos(0, y_base) tf_skl.bmp.clear() tf_skl.bmp.draw_text(in_txt) tf_skl.format_texture() } pub fn (mut tf_skl TTF_render_Sokol) create_text_block(in_txt string, in_w int, in_h int, in_font_size f32) { scale_reduct := tf_skl.scale_reduct device_dpi := tf_skl.device_dpi font_size := in_font_size //* scale_reduct // Formula: (font_size * device dpi) / (72dpi * em_unit) // scale := ((1.0 * devide_dpi )/ f32(72 * tf_skl.bmp.tf.units_per_em))* font_size scale := f32(font_size * device_dpi) / f32(72 * tf_skl.bmp.tf.units_per_em) // dprintln("Scale: $scale") tf_skl.bmp.scale = scale * scale_reduct w := in_w h := in_h tf_skl.bmp.width = int(w * scale_reduct + 0.5) tf_skl.bmp.height = int((h + 2) * scale_reduct + 0.5) sz := tf_skl.bmp.width * tf_skl.bmp.height * tf_skl.bmp.bp // if true { return } // RAM buffer if sz > tf_skl.bmp.buf_size { if sz > 0 { free(tf_skl.bmp.buf) } dprintln('Alloc: $sz bytes') tf_skl.bmp.buf = malloc(sz) tf_skl.bmp.buf_size = sz } tf_skl.bmp.init_filler() // draw the text mut y_base := int((tf_skl.bmp.tf.y_max - tf_skl.bmp.tf.y_min) * tf_skl.bmp.scale) tf_skl.bmp.set_pos(0, y_base) tf_skl.bmp.clear() tf_skl.bmp.draw_text_block(in_txt, x: 0, y: 0, w: w, h: h) tf_skl.format_texture() } /****************************************************************************** * * Sokol Render functions * ******************************************************************************/ pub fn (mut tf_skl TTF_render_Sokol) create_texture() { w := tf_skl.bmp.width h := tf_skl.bmp.height sz := tf_skl.bmp.width * tf_skl.bmp.height * tf_skl.bmp.bp mut img_desc := C.sg_image_desc{ width: w height: h num_mipmaps: 0 min_filter: .linear mag_filter: .linear // usage: .dynamic wrap_u: .clamp_to_edge wrap_v: .clamp_to_edge label: &byte(0) d3d11_texture: 0 } // comment for dynamic img_desc.content.subimage[0][0] = C.sg_subimage_content{ ptr: tf_skl.bmp.buf size: sz } simg := C.sg_make_image(&img_desc) // free(tf_skl.bmp.buf) // DONT FREE IF Dynamic tf_skl.sg_img = simg } pub fn (tf_skl TTF_render_Sokol) destroy_texture() { C.sg_destroy_image(tf_skl.sg_img) } // Use only if usage: .dynamic pub fn (mut tf_skl TTF_render_Sokol) update_text_texture() { sz := tf_skl.bmp.width * tf_skl.bmp.height * tf_skl.bmp.bp mut tmp_sbc := C.sg_image_content{} tmp_sbc.subimage[0][0] = C.sg_subimage_content{ ptr: tf_skl.bmp.buf size: sz } C.sg_update_image(tf_skl.sg_img, &tmp_sbc) } pub fn (tf_skl TTF_render_Sokol) draw_text_bmp(ctx &gg.Context, x f32, y f32) { // width := tf_skl.bmp.width >> 1 // height := tf_skl.bmp.height >> 1 sgl.push_matrix() width := tf_skl.bmp.width / (tf_skl.scale_reduct) height := tf_skl.bmp.height / (tf_skl.scale_reduct) u0 := f32(0.0) v0 := f32(0.0) u1 := f32(1.0) v1 := f32(1.0) x0 := f32(0) y0 := f32(0) x1 := f32(width) * ctx.scale y1 := f32(height) * ctx.scale ca := f32(math.cos(tf_skl.bmp.angle)) sa := f32(math.sin(tf_skl.bmp.angle)) m := [ f32(ca), -sa, 0, 0, sa, ca, 0, 0, 0, 0, 1, 0, x, y, 0, 1, ] sgl.mult_matrix(m) // sgl.load_pipeline(ctx.timage_pip) sgl.enable_texture() sgl.texture(tf_skl.sg_img) sgl.begin_quads() sgl.c4b(255, 255, 255, 255) sgl.v2f_t2f(x0, y0, u0, v0) sgl.v2f_t2f(x1, y0, u1, v0) sgl.v2f_t2f(x1, y1, u1, v1) sgl.v2f_t2f(x0, y1, u0, v1) sgl.end() sgl.disable_texture() sgl.pop_matrix() }