275 lines
7.4 KiB
C++
275 lines
7.4 KiB
C++
#include <pd/core/core.hpp>
|
|
#include <pd/drivers/gfx.hpp>
|
|
#include <pd/lithium/drawlist.hpp>
|
|
#include <pd/lithium/font.hpp>
|
|
#include <pd/lithium/math.hpp>
|
|
|
|
#define STB_TRUETYPE_IMPLEMENTATION
|
|
#include <stb_truetype.h>
|
|
|
|
#include <map>
|
|
|
|
namespace PD {
|
|
namespace Li {
|
|
PD_API void Font::LoadTTF(const std::string& path, int px_height) {
|
|
/**
|
|
* Just use LoadFile2Mem which looks way cleaner
|
|
* and helps not having the font loading code twice
|
|
* when adding LoadTTF with mem support
|
|
*/
|
|
PDLOG("Font: Loading {}...", path);
|
|
TT::Scope st("LI_LoadTTF_" + path);
|
|
auto font = PD::IO::LoadFile2Mem(path);
|
|
PDLOG("Font Size: {}", PD::Strings::FormatBytes(font.size()));
|
|
LoadTTF(font, px_height);
|
|
}
|
|
|
|
PD_API void Font::LoadTTF(const std::vector<u8>& data, int px_height) {
|
|
/**
|
|
* Some additional Info:
|
|
* Removed the stbtt get bitmapbox as we dont need to place
|
|
* the glyps nicely in the tex. next step would be using the free
|
|
* space on the y axis to get mor glyphs inside
|
|
*/
|
|
PixelHeight = px_height;
|
|
int texszs = PD::Bits::GetPow2(px_height * 16);
|
|
if (texszs > 1024) {
|
|
texszs = 1024; // Max size
|
|
}
|
|
|
|
stbtt_fontinfo inf;
|
|
if (!stbtt_InitFont(&inf, data.data(), 0)) {
|
|
return;
|
|
}
|
|
|
|
float scale = stbtt_ScaleForPixelHeight(&inf, PixelHeight);
|
|
|
|
int ascent, descent, lineGap;
|
|
stbtt_GetFontVMetrics(&inf, &ascent, &descent, &lineGap);
|
|
int baseline = static_cast<int>(ascent * scale);
|
|
|
|
// Cache to not render same codepoint tex twice
|
|
std::map<u32, int> buf_cache;
|
|
|
|
std::vector<u8> font_tex(texszs * texszs * 4, 0);
|
|
fvec2 off;
|
|
|
|
bool empty = true;
|
|
|
|
for (u32 ii = 0x0000; ii <= 0xFFFF; ii++) {
|
|
int gi = stbtt_FindGlyphIndex(&inf, ii);
|
|
if (gi == 0) continue;
|
|
if (stbtt_IsGlyphEmpty(&inf, gi)) continue;
|
|
|
|
int w = 0, h = 0, xo = 0, yo = 0;
|
|
unsigned char* bitmap =
|
|
stbtt_GetCodepointBitmap(&inf, scale, scale, ii, &w, &h, &xo, &yo);
|
|
if (!bitmap || w <= 0 || h <= 0) {
|
|
if (bitmap) free(bitmap);
|
|
continue;
|
|
}
|
|
|
|
u32 hashed_map = IO::HashMemory(std::vector<u8>(bitmap, bitmap + (w * h)));
|
|
if (buf_cache.find(hashed_map) != buf_cache.end()) {
|
|
Codepoint c = GetCodepoint(buf_cache[hashed_map]);
|
|
c.pCodepoint = ii;
|
|
CodeMap[ii] = c;
|
|
free(bitmap);
|
|
continue;
|
|
} else {
|
|
buf_cache[hashed_map] = ii;
|
|
}
|
|
|
|
// Next row
|
|
if (off.x + w > texszs) {
|
|
off.y += PixelHeight;
|
|
off.x = 0.0f;
|
|
}
|
|
// Bake cause we go out of the tex
|
|
if (off.y + PixelHeight > texszs) {
|
|
BakeAndPush(false, font_tex, texszs);
|
|
off = 0;
|
|
std::fill(font_tex.begin(), font_tex.end(), 0);
|
|
empty = true;
|
|
}
|
|
|
|
// UVs & Codepoint
|
|
Codepoint c;
|
|
fvec4 uvs;
|
|
// cast the ints to floats and not the floats...
|
|
// dont know where my mind was when creating the code
|
|
uvs.x = off.x / static_cast<float>(texszs);
|
|
uvs.y = off.y / static_cast<float>(texszs);
|
|
uvs.z = (off.x + w) / static_cast<float>(texszs);
|
|
uvs.w = (off.y + h) / static_cast<float>(texszs);
|
|
// Flip if needed
|
|
if (PD::Gfx::GetFlags() & PDBackendFlags_FlipUV_Y) {
|
|
uvs.y = 1.f - uvs.y;
|
|
uvs.w = 1.f - uvs.w;
|
|
}
|
|
c.SimpleUV = uvs;
|
|
c.Tex = pCurrentTex;
|
|
c.Size = fvec2(w, h);
|
|
c.Offset = baseline + yo;
|
|
c.pCodepoint = ii;
|
|
|
|
for (int y = 0; y < h; ++y) {
|
|
for (int x = 0; x < w; ++x) {
|
|
int map_pos = ((static_cast<int>(off.y) + y) * texszs +
|
|
(static_cast<int>(off.x) + x)) *
|
|
4;
|
|
font_tex[map_pos + 0] = 255;
|
|
font_tex[map_pos + 1] = 255;
|
|
font_tex[map_pos + 2] = 255;
|
|
font_tex[map_pos + 3] = bitmap[x + y * w];
|
|
}
|
|
}
|
|
|
|
empty = false;
|
|
CodeMap[ii] = c;
|
|
free(bitmap);
|
|
|
|
// offset by 1 (prevents visual glitches i had)
|
|
off.x += w + 1;
|
|
}
|
|
|
|
if (!empty) {
|
|
BakeAndPush(true, font_tex, texszs);
|
|
}
|
|
}
|
|
|
|
PD_API void Font::LoadDefaultFont(int id, int pixel_height) {}
|
|
|
|
PD_API Font::Codepoint& Font::GetCodepoint(u32 c) {
|
|
// Check if codepoijt exist or return a static invalid one
|
|
auto res = CodeMap.find(c);
|
|
if (res == CodeMap.end()) {
|
|
static Codepoint invalid;
|
|
invalid.pInvalid = true;
|
|
return invalid;
|
|
}
|
|
return res->second;
|
|
}
|
|
|
|
PD_API fvec2 Font::GetTextBounds(const char* text, float scale) {
|
|
// Create a temp position and offset as [0, 0]
|
|
fvec2 res;
|
|
float x = 0;
|
|
// Curent Font Scale
|
|
float cfs = (DefaultPixelHeight * scale) / (float)PixelHeight;
|
|
float lh = (float)PixelHeight * cfs;
|
|
U8Iterator it(text);
|
|
u32 c;
|
|
while (it.Decode32(c)) {
|
|
auto cp = GetCodepoint(c);
|
|
if (cp.pInvalid && c != '\n' && c != '\t' && c != ' ') {
|
|
continue;
|
|
}
|
|
switch (c) {
|
|
case L'\n':
|
|
res.y += lh;
|
|
res.x = std::max(res.x, x);
|
|
x = 0.f;
|
|
break;
|
|
case L'\t':
|
|
x += 16 * cfs;
|
|
break;
|
|
case L' ':
|
|
x += 4 * cfs;
|
|
// Fall trough here to get the same result as in
|
|
// TextCommand if/else Section
|
|
default:
|
|
x += cp.Size.x * cfs;
|
|
// Omly passing c cause i know its not used
|
|
if (it.PeekNext32(c)) {
|
|
x += 2 * cfs;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
res.x = std::max(res.x, x);
|
|
res.y += lh;
|
|
return res;
|
|
}
|
|
|
|
PD_API void Font::CmdTextEx(Drawlist& dl, const fvec2& pos, u32 color,
|
|
float scale, const char* text, LiTextFlags flags,
|
|
const fvec2& box) {
|
|
fvec2 off;
|
|
float cfs = (DefaultPixelHeight * scale) / (float)PixelHeight;
|
|
float lh = (float)PixelHeight * cfs;
|
|
fvec2 td;
|
|
fvec2 rpos = pos;
|
|
fvec2 rbox = box;
|
|
|
|
if (flags & (LiTextFlags_AlignMid | LiTextFlags_AlignRight)) {
|
|
td = GetTextBounds(text, scale);
|
|
}
|
|
if (flags & LiTextFlags_AlignMid) rpos = rbox * 0.5 - td * 0.5 + pos;
|
|
if (flags & LiTextFlags_AlignRight) rpos.x -= td.x;
|
|
|
|
U8Iterator it(text);
|
|
u32 c;
|
|
Command* cmd = nullptr;
|
|
while (it.Decode32(c)) {
|
|
auto cp = GetCodepoint(c);
|
|
if ((cp.pInvalid && c != L'\n' && c != L'\t' && c != L' ') && c != L'\r')
|
|
continue;
|
|
|
|
if (c == L'\n') {
|
|
off.y += lh;
|
|
off.x = 0.f;
|
|
continue;
|
|
}
|
|
|
|
if (c == L'\t') {
|
|
off.x += 16 * cfs;
|
|
continue;
|
|
}
|
|
if (c == L' ') {
|
|
off.x += 4 * cfs;
|
|
continue;
|
|
}
|
|
|
|
if (cmd == nullptr || cmd->Tex != Textures[cp.Tex]) {
|
|
if (cp.Tex >= Textures.size()) continue;
|
|
cmd = &dl.NewCommand();
|
|
cmd->Tex = Textures[cp.Tex];
|
|
}
|
|
|
|
if (flags & LiTextFlags_Shaddow) {
|
|
Rect rec = Math::PrimRect(rpos + off + fvec2(1, cp.Offset * cfs + 1),
|
|
cp.Size * cfs, 0.f);
|
|
dl.PrimQuad(*cmd, rec, cp.SimpleUV, 0xff111111);
|
|
}
|
|
|
|
Rect rec = Math::PrimRect(rpos + off + fvec2(0, cp.Offset * cfs),
|
|
cp.Size * cfs, 0.f);
|
|
dl.PrimQuad(*cmd, rec, cp.SimpleUV, color);
|
|
|
|
off.x += cp.Size.x * cfs + 2 * cfs;
|
|
}
|
|
}
|
|
|
|
PD_API void Font::CleanupTMS() {}
|
|
|
|
PD_API void Font::BakeAndPush(bool final, std::vector<u8>& font_tex,
|
|
int texszs) {
|
|
auto t = PD::Gfx::LoadTexture(font_tex, texszs, texszs);
|
|
PDLOG("Font: Texture backed as 0x{:X} at {}", t.GetID(), pCurrentTex);
|
|
Textures.push_back(t.GetID());
|
|
pCurrentTex = Textures.size();
|
|
}
|
|
|
|
PD_API std::string Font::pWrapText(const std::string& txt, float scale,
|
|
const PD::fvec2& max, PD::fvec2& dim) {
|
|
return "";
|
|
}
|
|
|
|
PD_API std::string Font::pShortText(const std::string& txt, float scale,
|
|
const PD::fvec2& max, PD::fvec2& dim) {
|
|
return "";
|
|
}
|
|
|
|
} // namespace Li
|
|
} // namespace PD
|