98 lines
No EOL
3.8 KiB
C++
98 lines
No EOL
3.8 KiB
C++
/*
|
|
Crafter®.Graphics
|
|
Copyright (C) 2025 Catcrafts®
|
|
Catcrafts.net
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 3.0 of the License, or (at your option) any later version.
|
|
|
|
This library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with this library; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
module;
|
|
#include "../lib/stb_truetype.h"
|
|
module Crafter.Graphics:TextElement_impl;
|
|
import :TextElement;
|
|
import :RenderingElement;
|
|
import :Window;
|
|
import :Types;
|
|
import :Font;
|
|
import std;
|
|
|
|
using namespace Crafter;
|
|
|
|
TextElement::TextElement(std::int_fast32_t anchorX, std::int_fast32_t anchorY, std::uint_fast32_t relativeWidth, std::uint_fast32_t relativeHeight, std::int_fast32_t anchorOffsetX, std::int_fast32_t anchorOffsetY, std::int_fast32_t z, bool ignoreScaling) : RenderingElementPreScaled(false, anchorX, anchorY, relativeWidth, relativeHeight, anchorOffsetX, anchorOffsetY, z, ignoreScaling) {
|
|
|
|
}
|
|
|
|
void TextElement::RenderText(const std::string_view text, float size, Pixel_BU8_GU8_RU8_AU8 color, Font& font) {
|
|
// Calculate the actual size needed for the text
|
|
float scale = stbtt_ScaleForPixelHeight(&font.font, size);
|
|
int baseline = (int)(font.ascent * scale);
|
|
|
|
std::uint_fast32_t textWidth = 0;
|
|
for (const char c : text) {
|
|
int advance, lsb;
|
|
stbtt_GetCodepointHMetrics(&font.font, c, &advance, &lsb);
|
|
textWidth += (int)(advance * scale);
|
|
}
|
|
|
|
// Clear the scaled buffer
|
|
for (auto& pixel : bufferScaled) {
|
|
pixel = {0, 0, 0, 0};
|
|
}
|
|
|
|
// Only render text if we have space
|
|
if (textWidth <= scaled.width && (font.ascent - font.descent) * scale <= scaled.height) {
|
|
// Calculate starting position to center text horizontally and vertically
|
|
int startX = (scaled.width - textWidth) / 2;
|
|
int startY = ( scaled.height - (font.ascent - font.descent) * scale) / 2;
|
|
startY += baseline; // Adjust for baseline
|
|
|
|
int x = startX;
|
|
for (std::uint_fast32_t i = 0; i < text.size(); i++) {
|
|
int codepoint = text[i];
|
|
|
|
int ax;
|
|
int lsb;
|
|
stbtt_GetCodepointHMetrics(&font.font, codepoint, &ax, &lsb);
|
|
|
|
int c_x1, c_y1, c_x2, c_y2;
|
|
stbtt_GetCodepointBitmapBox(&font.font, codepoint, scale, scale, &c_x1, &c_y1, &c_x2, &c_y2);
|
|
|
|
int w = c_x2 - c_x1;
|
|
int h = c_y2 - c_y1;
|
|
|
|
std::vector<unsigned char> bitmap(w * h);
|
|
stbtt_MakeCodepointBitmap(&font.font, bitmap.data(), w, h, w, scale, scale, codepoint);
|
|
|
|
// Only render characters that fit within the scaled bounds
|
|
for (int j = 0; j < h; j++) {
|
|
for (int i = 0; i < w; i++) {
|
|
int bufferX = x + i + c_x1;
|
|
int bufferY = startY + j + c_y1;
|
|
|
|
// Only draw pixels that are within our scaled buffer bounds
|
|
if (bufferX >= 0 && bufferX < (int)scaled.width && bufferY >= 0 && bufferY < (int) scaled.height) {
|
|
bufferScaled[bufferY * scaled.width + bufferX] = {color.r, color.g, color.b, bitmap[j * w + i]};
|
|
}
|
|
}
|
|
}
|
|
|
|
x += (int)(ax * scale);
|
|
|
|
if (i + 1 < text.size()) {
|
|
x += (int)stbtt_GetCodepointKernAdvance(&font.font, codepoint, text[i+1] * scale);
|
|
}
|
|
}
|
|
}
|
|
} |