295 lines
8.2 KiB
C++
295 lines
8.2 KiB
C++
#include "core/rendering/text.hpp"
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <fstream>
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#include <iostream>
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#include <sstream>
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#include <string>
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#include "core/jail/jfile.hpp"
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// Forward declarations de gif.h (inclòs des de jdraw8.cpp, no es pot incloure dos vegades)
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struct rgb;
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extern unsigned char* LoadGif(unsigned char* data, unsigned short* w, unsigned short* h);
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Text::Text(const char* fnt_file, const char* gif_file) {
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loadBitmap(gif_file);
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loadFont(fnt_file);
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}
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Text::~Text() {
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if (bitmap_) free(bitmap_);
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}
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// --- UTF-8 ---
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auto Text::nextCodepoint(const char*& ptr) -> uint32_t {
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auto byte = static_cast<uint8_t>(*ptr);
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if (byte == 0) return 0;
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uint32_t cp = 0;
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int extra = 0;
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if (byte < 0x80) {
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cp = byte;
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} else if ((byte & 0xE0) == 0xC0) {
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cp = byte & 0x1F;
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extra = 1;
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} else if ((byte & 0xF0) == 0xE0) {
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cp = byte & 0x0F;
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extra = 2;
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} else if ((byte & 0xF8) == 0xF0) {
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cp = byte & 0x07;
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extra = 3;
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} else {
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ptr++;
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return 0xFFFD;
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}
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ptr++;
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for (int i = 0; i < extra; i++) {
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auto cont = static_cast<uint8_t>(*ptr);
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if ((cont & 0xC0) != 0x80) return 0xFFFD;
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cp = (cp << 6) | (cont & 0x3F);
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ptr++;
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}
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return cp;
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}
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// --- Càrrega de font ---
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void Text::loadFont(const char* fnt_file) {
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int filesize = 0;
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char* buffer = file_getfilebuffer(fnt_file, filesize, true);
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if (!buffer) {
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std::cerr << "Text: unable to load font file: " << fnt_file << '\n';
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return;
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}
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std::istringstream stream(std::string(buffer, filesize));
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free(buffer);
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std::string line;
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int glyph_index = 0;
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while (std::getline(stream, line)) {
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// Ignora comentaris i línies buides
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if (line.empty() || line[0] == '#') continue;
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// Elimina comentaris inline
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auto comment_pos = line.find('#');
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if (comment_pos != std::string::npos) {
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line = line.substr(0, comment_pos);
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}
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// Parseja directives
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if (line.find("box_width") == 0) {
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sscanf(line.c_str(), "box_width %d", &box_width_);
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continue;
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}
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if (line.find("box_height") == 0) {
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sscanf(line.c_str(), "box_height %d", &box_height_);
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continue;
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}
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if (line.find("columns") == 0) {
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sscanf(line.c_str(), "columns %d", &columns_);
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continue;
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}
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if (line.find("cell_spacing") == 0) {
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sscanf(line.c_str(), "cell_spacing %d", &cell_spacing_);
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continue;
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}
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if (line.find("row_spacing") == 0) {
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sscanf(line.c_str(), "row_spacing %d", &row_spacing_);
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continue;
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}
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// Línies de glifos: "codepoint width"
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uint32_t codepoint = 0;
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int visual_width = 0;
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if (sscanf(line.c_str(), "%u %d", &codepoint, &visual_width) == 2) {
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int col = glyph_index % columns_;
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int row = glyph_index / columns_;
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GlyphInfo glyph{};
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glyph.x = col * (box_width_ + cell_spacing_) + cell_spacing_;
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glyph.y = row * (box_height_ + (row_spacing_ > 0 ? row_spacing_ : cell_spacing_)) + cell_spacing_;
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glyph.w = visual_width;
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glyphs_[codepoint] = glyph;
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glyph_index++;
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}
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}
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std::cout << "Text: loaded font with " << glyphs_.size() << " glyphs (" << box_width_ << "x" << box_height_ << ")\n";
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}
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void Text::loadBitmap(const char* gif_file) {
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int filesize = 0;
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char* buffer = file_getfilebuffer(gif_file, filesize);
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if (!buffer) {
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std::cerr << "Text: unable to load bitmap: " << gif_file << '\n';
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return;
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}
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// Extrau dimensions del header GIF (bytes 6-7 = width, 8-9 = height, little-endian)
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auto* raw = reinterpret_cast<unsigned char*>(buffer);
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int w = raw[6] | (raw[7] << 8);
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int h = raw[8] | (raw[9] << 8);
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unsigned short gw = 0, gh = 0;
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Uint8* pixels = LoadGif(raw, &gw, &gh);
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if (!pixels) {
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std::cerr << "Text: unable to decode GIF: " << gif_file << '\n';
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free(buffer);
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return;
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}
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bitmap_width_ = w;
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bitmap_height_ = h;
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bitmap_ = pixels;
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free(buffer);
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std::cout << "Text: bitmap loaded " << w << "x" << h << '\n';
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}
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// --- Renderitzat ---
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void Text::draw(Uint32* pixel_data, int x, int y, const char* text, Uint32 color) const {
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if (!bitmap_ || !pixel_data) return;
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const char* ptr = text;
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int cursor_x = x;
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while (*ptr) {
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uint32_t cp = nextCodepoint(ptr);
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if (cp == 0) break;
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auto it = glyphs_.find(cp);
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if (it == glyphs_.end()) {
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it = glyphs_.find('?');
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if (it == glyphs_.end()) {
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cursor_x += box_width_;
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continue;
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}
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}
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const auto& glyph = it->second;
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// Pinta glifo pixel a pixel
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for (int gy = 0; gy < box_height_; gy++) {
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int dst_y = y + gy;
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if (dst_y < 0 || dst_y >= SCREEN_HEIGHT) continue;
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for (int gx = 0; gx < glyph.w; gx++) {
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int dst_x = cursor_x + gx;
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if (dst_x < 0 || dst_x >= SCREEN_WIDTH) continue;
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int src_x = glyph.x + gx;
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int src_y = glyph.y + gy;
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if (src_x >= bitmap_width_ || src_y >= bitmap_height_) continue;
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Uint8 pixel = bitmap_[src_x + src_y * bitmap_width_];
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// Píxel no transparent (índex 0 és fons típicament)
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if (pixel != 0) {
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pixel_data[dst_x + dst_y * SCREEN_WIDTH] = color;
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}
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}
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}
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cursor_x += glyph.w + 1; // +1 kerning
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}
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}
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void Text::drawCentered(Uint32* pixel_data, int y, const char* text, Uint32 color) const {
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int w = width(text);
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int x = (SCREEN_WIDTH - w) / 2;
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draw(pixel_data, x, y, text, color);
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}
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void Text::drawClipped(Uint32* pixel_data, int x, int y, const char* text, Uint32 color, int clip_x_min, int clip_x_max, int clip_y_min, int clip_y_max) const {
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if (!bitmap_ || !pixel_data) return;
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// Descart ràpid si el glifo sencer cau fora verticalment
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if (y + box_height_ <= clip_y_min || y >= clip_y_max) return;
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const char* ptr = text;
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int cursor_x = x;
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while (*ptr) {
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uint32_t cp = nextCodepoint(ptr);
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if (cp == 0) break;
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auto it = glyphs_.find(cp);
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if (it == glyphs_.end()) {
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it = glyphs_.find('?');
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if (it == glyphs_.end()) {
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cursor_x += box_width_;
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continue;
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}
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}
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const auto& glyph = it->second;
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// Si el glifo està completament fora del clip horitzontal, salta
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if (cursor_x + glyph.w <= clip_x_min || cursor_x >= clip_x_max) {
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cursor_x += glyph.w + 1;
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continue;
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}
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for (int gy = 0; gy < box_height_; gy++) {
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int dst_y = y + gy;
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if (dst_y < 0 || dst_y >= SCREEN_HEIGHT) continue;
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if (dst_y < clip_y_min || dst_y >= clip_y_max) continue;
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for (int gx = 0; gx < glyph.w; gx++) {
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int dst_x = cursor_x + gx;
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if (dst_x < 0 || dst_x >= SCREEN_WIDTH) continue;
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if (dst_x < clip_x_min || dst_x >= clip_x_max) continue;
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int src_x = glyph.x + gx;
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int src_y = glyph.y + gy;
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if (src_x >= bitmap_width_ || src_y >= bitmap_height_) continue;
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Uint8 pixel = bitmap_[src_x + src_y * bitmap_width_];
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if (pixel != 0) {
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pixel_data[dst_x + dst_y * SCREEN_WIDTH] = color;
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}
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}
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}
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cursor_x += glyph.w + 1;
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}
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}
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auto Text::width(const char* text) const -> int {
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const char* ptr = text;
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int w = 0;
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bool first = true;
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while (*ptr) {
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uint32_t cp = nextCodepoint(ptr);
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if (cp == 0) break;
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auto it = glyphs_.find(cp);
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if (it == glyphs_.end()) {
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it = glyphs_.find('?');
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}
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if (!first) w += 1; // kerning
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first = false;
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if (it != glyphs_.end()) {
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w += it->second.w;
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} else {
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w += box_width_;
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}
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}
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return w;
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}
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