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295 lines
10 KiB
295 lines
10 KiB
/* The MIT License
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*
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* Copyright (c) 2010 OTClient, https://github.com/edubart/otclient
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*
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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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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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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
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* THE SOFTWARE.
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*/
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#include <prerequisites.h>
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#include <core/resources.h>
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#include <graphics/font.h>
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#include <graphics/textures.h>
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#include <graphics/graphics.h>
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void Font::calculateGlyphsWidthsAutomatically(const Size& glyphSize)
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{
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int numHorizontalGlyphs = m_texture->getSize().width() / glyphSize.width();
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uchar *texturePixels = m_texture->getPixels();
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// small AI to auto calculate pixels widths
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for(int glyph = 32; glyph< 256; ++glyph) {
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Rect glyphCoords(((glyph - 32) % numHorizontalGlyphs) * glyphSize.width(),
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((glyph - 32) / numHorizontalGlyphs) * glyphSize.height(),
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glyphSize.width(),
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m_glyphHeight);
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int width = glyphSize.width();
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for(int x = glyphCoords.left() + 2; x <= glyphCoords.right(); ++x) {
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bool allAlpha = true;
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// check if all vertical pixels are alpha
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for(int y = glyphCoords.top(); y <= glyphCoords.bottom(); ++y) {
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if(texturePixels[(y * m_texture->getSize().width() * 4) + (x*4) + 3] != 0) {
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allAlpha = false;
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break;
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}
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}
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// if all pixels were alpha we found the width
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if(allAlpha) {
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width = x - glyphCoords.left();
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break;
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}
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}
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// store glyph size
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m_glyphsSize[glyph].setSize(width, m_glyphHeight);
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}
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delete[] texturePixels;
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}
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bool Font::load(const std::string& file)
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{
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std::string fileContents = g_resources.loadTextFile(file);
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if(!fileContents.size()) {
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logError("Coult not load font file \"%s", file.c_str());
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return false;
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}
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std::istringstream fin(fileContents);
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std::string textureName;
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Size glyphSize;
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try {
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YAML::Parser parser(fin);
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YAML::Node doc;
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parser.GetNextDocument(doc);
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// required values
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doc["glyph height"] >> m_glyphHeight;
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doc["image glyph size"] >> glyphSize;
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doc["image"] >> textureName;
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// optional values
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if(doc.FindValue("glyph spacing"))
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doc["glyph spacing"] >> m_glyphSpacing;
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if(doc.FindValue("top margin"))
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doc["top margin"] >> m_topMargin;
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// load texture
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m_texture = g_textures.get("fonts/" + textureName);
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if(!m_texture) {
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logError("Failed to load image for font file \"%s\"", file.c_str());
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return false;
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}
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// auto calculate widths
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calculateGlyphsWidthsAutomatically(glyphSize);
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// read custom widths
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if(doc.FindValue("glyph widths")) {
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const YAML::Node& widthsNode = doc["glyph widths"];
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for(auto it = widthsNode.begin(); it != widthsNode.end(); ++it) {
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int glyph, glyphWidth;
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it.first() >> glyph;
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it.second() >> glyphWidth;
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m_glyphsSize[glyph].setWidth(glyphWidth);
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}
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}
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// calculate glyphs texture coords
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int numHorizontalGlyphs = m_texture->getSize().width() / glyphSize.width();
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for(int glyph = 32; glyph< 256; ++glyph) {
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m_glyphsTextureCoords[glyph].setRect(((glyph - 32) % numHorizontalGlyphs) * glyphSize.width(),
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((glyph - 32) / numHorizontalGlyphs) * glyphSize.height(),
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m_glyphsSize[glyph].width(),
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m_glyphHeight);
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}
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} catch (YAML::Exception& e) {
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logError("Malformed font file \"%s\":\n %s", file.c_str(), e.what());
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return false;
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}
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return true;
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}
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void Font::renderText(const std::string& text,
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const Point& startPos,
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const Color& color)
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{
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Size boxSize = g_graphics.getScreenSize() - startPos.toSize();
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Rect screenCoords(startPos, boxSize);
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renderText(text, screenCoords, ALIGN_TOP_LEFT, color);
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}
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void Font::renderText(const std::string& text,
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const Rect& screenCoords,
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int align,
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const Color& color)
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{
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// prevent glitches from invalid rects
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if(!screenCoords.isValid())
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return;
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int textLenght = text.length();
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// map glyphs positions
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Size textBoxSize;
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const std::vector<Point>& glyphsPositions = calculateGlyphsPositions(text, align, &textBoxSize);
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for(int i = 0; i < textLenght; ++i) {
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int glyph = (uchar)text[i];
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// skip invalid glyphs
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if(glyph < 32)
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continue;
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// calculate initial glyph rect and texture coords
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Rect glyphScreenCoords(glyphsPositions[i], m_glyphsSize[glyph]);
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Rect glyphTextureCoords = m_glyphsTextureCoords[glyph];
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// first translate to align position
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if(align & ALIGN_BOTTOM) {
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glyphScreenCoords.translate(0, screenCoords.height() - textBoxSize.height());
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} else if(align & ALIGN_VERTICAL_CENTER) {
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glyphScreenCoords.translate(0, (screenCoords.height() - textBoxSize.height()) / 2);
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} else { // ALIGN_TOP
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// nothing to do
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}
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if(align & ALIGN_RIGHT) {
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glyphScreenCoords.translate(screenCoords.width() - textBoxSize.width(), 0);
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} else if(align & ALIGN_HORIZONTAL_CENTER) {
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glyphScreenCoords.translate((screenCoords.width() - textBoxSize.width()) / 2, 0);
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} else { // ALIGN_TOP
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// nothing to do
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}
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// translate rect to screen coords
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glyphScreenCoords.translate(screenCoords.topLeft());
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// only render if glyph rect is visible on screenCoords
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if(!screenCoords.intersects(glyphScreenCoords))
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continue;
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// bound glyph bottomRight to screenCoords bottomRight
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if(glyphScreenCoords.bottom() > screenCoords.bottom()) {
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glyphTextureCoords.setBottom(glyphTextureCoords.bottom() + (screenCoords.bottom() - glyphScreenCoords.bottom()));
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glyphScreenCoords.setBottom(screenCoords.bottom());
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}
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if(glyphScreenCoords.right() > screenCoords.right()) {
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glyphTextureCoords.setRight(glyphTextureCoords.right() + (screenCoords.right() - glyphScreenCoords.right()));
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glyphScreenCoords.setRight(screenCoords.right());
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}
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// render glyph
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g_graphics.drawTexturedRect(glyphScreenCoords, m_texture, glyphTextureCoords, color);
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}
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}
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const std::vector<Point>& Font::calculateGlyphsPositions(const std::string& text, int align, Size *textBoxSize) const
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{
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// for performance reasons we use statics vectors that are allocated on demand
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static std::vector<Point> glyphsPositions(1);
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static std::vector<int> lineWidths(1);
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int textLength = text.length();
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int maxLineWidth = 0;
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int lines = 0;
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int glyph;
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int i;
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// return if there is no text
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if(textLength == 0) {
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if(textBoxSize)
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textBoxSize->setSize(0,0);
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return glyphsPositions;
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}
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// resize glyphsPositions vector when needed
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if(textLength > (int)glyphsPositions.size())
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glyphsPositions.resize(textLength);
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// calculate lines width
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if((align & ALIGN_RIGHT || align & ALIGN_HORIZONTAL_CENTER) || textBoxSize) {
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lineWidths[0] = 0;
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for(i = 0; i< textLength; ++i) {
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glyph = (uchar)text[i];
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if(glyph == (uchar)'\n') {
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lines++;
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if(lines+1 > (int)lineWidths.size())
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lineWidths.resize(lines+1);
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lineWidths[lines] = 0;
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} else if(glyph >= 32) {
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lineWidths[lines] += m_glyphsSize[glyph].width() + m_glyphSpacing.width();
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maxLineWidth = std::max(maxLineWidth, lineWidths[lines]);
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}
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}
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}
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Point virtualPos(0, m_topMargin);
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lines = 0;
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for(i = 0; i < textLength; ++i) {
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glyph = (uchar)text[i];
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// new line or first glyph
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if(glyph == (uchar)'\n' || i == 0) {
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if(glyph == (uchar)'\n') {
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virtualPos.y += m_glyphHeight + m_glyphSpacing.height();
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lines++;
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}
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// calculate start x pos
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if(align & ALIGN_RIGHT) {
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virtualPos.x = (maxLineWidth - lineWidths[lines]);
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} else if(align & ALIGN_HORIZONTAL_CENTER) {
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virtualPos.x = (maxLineWidth - lineWidths[lines]) / 2;
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} else { // ALIGN_LEFT
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virtualPos.x = 0;
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}
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}
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// store current glyph topLeft
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glyphsPositions[i] = virtualPos;
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// render only if the glyph is valid
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if(glyph >= 32 && glyph != (uchar)'\n') {
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virtualPos.x += m_glyphsSize[glyph].width() + m_glyphSpacing.width();
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}
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}
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if(textBoxSize) {
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textBoxSize->setWidth(maxLineWidth);
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textBoxSize->setHeight(virtualPos.y + m_glyphHeight);
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}
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return glyphsPositions;
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}
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Size Font::calculateTextRectSize(const std::string& text)
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{
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Size size;
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calculateGlyphsPositions(text, ALIGN_TOP_LEFT, &size);
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return size;
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}
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