tobid7
3823f08bab
- Add support for splitting glyphs over multiple textures - Fix some casts in wrong places (like casting a float to float?) - Add a break if stb truetype fails - Fix a typo in FontRenderer Shaddow part (used .x twice) - Use L' ' for the wstring chars - TODO: Fix the space of tabs / space chars (currently hardcoded) - WARNING - Spaces are broken (idk why)
319 lines
9.4 KiB
C++
Executable File
319 lines
9.4 KiB
C++
Executable File
/*
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MIT License
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Copyright (c) 2024 - 2025 tobid7
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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#include <pd/lithium/font.hpp>
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/** Due to Limitations of Shared Lib Stuff */
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#ifdef PD_LITHIUM_BUILD_SHARED
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#define STB_TRUETYPE_IMPLEMENTATION
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#endif
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#include <pd/external/stb_truetype.h>
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#include <pd/lithium/renderer.hpp>
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#ifdef PD_LI_INCLUDE_FONTS
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#include <pd/lithium/fonts.hpp>
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#endif
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namespace PD {
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namespace Li {
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PD_LITHIUM_API void Font::LoadDefaultFont(int id, int pixel_height) {
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#ifdef PD_LI_INCLUDE_FONTS
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if (id < pNumFonts) {
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auto font = pFontData[id];
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LoadTTF(std::vector<u8>(&pFontsDataRaw[font.StartOff],
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&pFontsDataRaw[font.StartOff + font.Size]),
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pixel_height);
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}
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#endif
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}
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PD_LITHIUM_API void Font::LoadTTF(const std::string &path, int height) {
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/**
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* Just use LoadFile2Mem which looks way cleaner
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* and helps not having the font loading code twice
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* when adding LoadTTF with mem support
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*/
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TT::Scope st("LI_LoadTTF_" + path);
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auto font = PD::IO::LoadFile2Mem(path);
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LoadTTF(font, height);
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}
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PD_LITHIUM_API void Font::pMakeAtlas(bool final, std::vector<u8> &font_tex,
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int texszs, PD::Li::Texture::Ref tex) {
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auto t =
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Gfx::LoadTex(font_tex, texszs, texszs, Texture::RGBA32, Texture::LINEAR);
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tex->CopyFrom(t);
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Textures.push_back(tex);
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}
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PD_LITHIUM_API void Font::LoadTTF(const std::vector<u8> &data, int height) {
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/**
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* Some additional Info:
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* Removed the stbtt get bitmapbox as we dont need to place
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* the glyps nicely in the tex. next step would be using the free
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* space on the y axis to get mor glyphs inside
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*/
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PixelHeight = height;
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int texszs = PD::BitUtil::GetPow2(height * 16);
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if (texszs > 1024) {
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texszs = 1024; // Max size
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}
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stbtt_fontinfo inf;
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if (!stbtt_InitFont(&inf, data.data(), 0)) {
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return;
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}
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float scale = stbtt_ScaleForPixelHeight(&inf, PixelHeight);
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int ascent, descent, lineGap;
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stbtt_GetFontVMetrics(&inf, &ascent, &descent, &lineGap);
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int baseline = static_cast<int>(ascent * scale);
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// Cache to not render same codepoint tex twice
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std::map<u32, int> buf_cache;
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std::vector<u8> font_tex(texszs * texszs * 4, 0);
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auto tex = Texture::New();
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fvec2 off;
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bool empty = true;
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for (u32 ii = 0x0000; ii <= 0xFFFF; ii++) {
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int gi = stbtt_FindGlyphIndex(&inf, ii);
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if (gi == 0) continue;
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if (stbtt_IsGlyphEmpty(&inf, gi)) continue;
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int w = 0, h = 0, xo = 0, yo = 0;
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unsigned char *bitmap =
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stbtt_GetCodepointBitmap(&inf, scale, scale, ii, &w, &h, &xo, &yo);
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if (!bitmap || w <= 0 || h <= 0) {
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if (bitmap) free(bitmap);
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continue;
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}
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u32 hashed_map = IO::HashMemory(std::vector<u8>(bitmap, bitmap + (w * h)));
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if (buf_cache.find(hashed_map) != buf_cache.end()) {
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Codepoint c = GetCodepoint(buf_cache[hashed_map]);
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c.pCodepoint = ii;
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CodeMap[ii] = c;
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free(bitmap);
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continue;
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} else {
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buf_cache[hashed_map] = ii;
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}
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// Next row
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if (off.x + w > texszs) {
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off.y += PixelHeight;
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off.x = 0.0f;
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}
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// Bake cause we go out of the tex
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if (off.y + PixelHeight > texszs) {
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pMakeAtlas(false, font_tex, texszs, tex);
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tex = Texture::New();
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off = 0;
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std::fill(font_tex.begin(), font_tex.end(), 0);
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empty = true;
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}
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// UVs & Codepoint
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Codepoint c;
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fvec4 uvs;
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// cast the ints to floats and not the floats...
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// dont know where my mind was when creating the code
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uvs.x = off.x / static_cast<float>(texszs);
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uvs.y = off.y / static_cast<float>(texszs);
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uvs.z = (off.x + w) / static_cast<float>(texszs);
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uvs.w = (off.y + h) / static_cast<float>(texszs);
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// Flip if needed
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if (Gfx::Flags() & LiBackendFlags_FlipUV_Y) {
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uvs.y = 1.f - uvs.y;
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uvs.w = 1.f - uvs.w;
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}
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c.SimpleUV = uvs;
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c.Tex = tex;
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c.Size = fvec2(w, h);
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c.Offset = baseline + yo;
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c.pCodepoint = ii;
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for (int y = 0; y < h; ++y) {
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for (int x = 0; x < w; ++x) {
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int map_pos = ((static_cast<int>(off.y) + y) * texszs +
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(static_cast<int>(off.x) + x)) *
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4;
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font_tex[map_pos + 0] = 255;
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font_tex[map_pos + 1] = 255;
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font_tex[map_pos + 2] = 255;
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font_tex[map_pos + 3] = bitmap[x + y * w];
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}
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}
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empty = false;
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CodeMap[ii] = c;
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free(bitmap);
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// offset by 1 (prevents visual glitches i had)
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off.x += w + 1;
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}
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if (!empty) {
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pMakeAtlas(true, font_tex, texszs, tex);
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}
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}
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PD_LITHIUM_API Font::Codepoint &Font::GetCodepoint(u32 cp) {
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// Check if codepoijt exist or return a static invalid one
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auto res = CodeMap.find(cp);
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if (res == CodeMap.end()) {
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static Codepoint invalid;
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invalid.pInvalid = true;
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return invalid;
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}
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return res->second;
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}
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PD_LITHIUM_API fvec2 Font::GetTextBounds(const std::string &text, float scale) {
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// Use wstring for exemple for german äöü
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auto wtext = Strings::MakeWstring(text);
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// Create a temp position and offset as [0, 0]
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fvec2 res;
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float x = 0;
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// Curent Font Scale
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float cfs = (DefaultPixelHeight * scale) / (float)PixelHeight;
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float lh = (float)PixelHeight * cfs;
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size_t index = 0;
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for (auto &it : wtext) {
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if (it == L'\0') {
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break;
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}
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index++;
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auto cp = GetCodepoint(it);
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if (cp.pInvalid && it != '\n' && it != '\t' && it != ' ') {
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continue;
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}
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switch (it) {
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case L'\n':
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res.y += lh;
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res.x = std::max(res.x, x);
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x = 0.f;
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break;
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case L'\t':
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x += 16 * cfs;
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break;
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case L' ':
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x += 16 * cfs;
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// Fall trough here to get the same result as in
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// TextCommand if/else Section
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default:
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x += cp.Size.x * cfs;
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if (index != wtext.size()) {
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x += 2 * cfs;
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}
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break;
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}
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}
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res.x = std::max(res.x, x);
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res.y += lh;
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return res;
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}
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PD_LITHIUM_API void Font::CmdTextEx(std::vector<Command::Ref> &cmds,
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const fvec2 &pos, u32 color, float scale,
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const std::string &text, LiTextFlags flags,
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const fvec2 &box) {
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fvec2 off;
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float cfs = (DefaultPixelHeight * scale) / (float)PixelHeight;
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float lh = (float)PixelHeight * cfs;
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fvec2 td;
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fvec2 rpos = pos;
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fvec2 rbox = box;
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if (flags & (LiTextFlags_AlignMid | LiTextFlags_AlignRight)) {
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td = GetTextBounds(text, scale);
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}
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if (flags & LiTextFlags_AlignMid) {
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rpos = rbox * 0.5 - td * 0.5 + pos;
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}
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if (flags & LiTextFlags_AlignRight) {
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rpos.x = rpos.x - td.x;
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}
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std::vector<std::string> lines;
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std::istringstream iss(text);
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std::string tmp;
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while (std::getline(iss, tmp)) {
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lines.push_back(tmp);
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}
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for (auto &it : lines) {
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/*if (flags & LITextFlags_Short) {
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fvec2 tmp_dim;
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it = ShortText(it, box.x() - pos.x(), tmp_dim);
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}*/
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auto wline = Strings::MakeWstring(it);
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auto cmd = Command::New();
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auto Tex = GetCodepoint(wline[0]).Tex;
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cmd->Tex = Tex;
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for (auto &jt : wline) {
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auto cp = GetCodepoint(jt);
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if ((cp.pInvalid && jt != L' ' && jt != L'\n' && jt != L'\t') &&
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jt != L'\r') {
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continue;
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}
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if (Tex != cp.Tex) {
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cmds.push_back(std::move(cmd));
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cmd = Command::New();
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Tex = cp.Tex;
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cmd->Tex = Tex;
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}
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if (jt == L'\t') {
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off.x += 16 * cfs;
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} else {
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if (jt != L' ') {
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if (flags & LiTextFlags_Shaddow) {
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// Draw
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Rect rec = Renderer::PrimRect(
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rpos + vec2(off.x + 1, off.y + (cp.Offset * cfs)) + 1,
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cp.Size * cfs, 0.f);
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Renderer::CmdQuad(cmd.get(), rec, cp.SimpleUV, 0xff111111);
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}
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// Draw
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Rect rec = Renderer::PrimRect(
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rpos + off + fvec2(0, (cp.Offset * cfs)), cp.Size * cfs, 0.f);
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Renderer::CmdQuad(cmd.get(), rec, cp.SimpleUV, color);
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off.x += cp.Size.x * cfs + 2 * cfs;
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} else {
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off.x += 16 * cfs;
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}
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}
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}
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cmds.push_back(std::move(cmd));
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off.y += lh;
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off.x = 0;
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}
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}
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} // namespace Li
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} // namespace PD
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