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285 lines
11 KiB
285 lines
11 KiB
/*
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* Copyright (c) 2010-2012 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 "font.h"
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#include "texturemanager.h"
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#include "graphics.h"
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#include <framework/otml/otml.h>
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void Font::load(const OTMLNodePtr& fontNode)
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{
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OTMLNodePtr textureNode = fontNode->at("texture");
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std::string textureFile = Fw::resolvePath(textureNode->value(), textureNode->source());
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Size glyphSize = fontNode->valueAt<Size>("glyph-size");
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m_glyphHeight = fontNode->valueAt<int>("height");
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m_yOffset = fontNode->valueAt("y-offset", 0);
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m_firstGlyph = fontNode->valueAt("first-glyph", 32);
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m_glyphSpacing = fontNode->valueAt("spacing", Size(0,0));
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// load font texture
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m_texture = g_textures.getTexture(textureFile);
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if(OTMLNodePtr node = fontNode->get("fixed-glyph-width")) {
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for(int glyph = m_firstGlyph; glyph < 256; ++glyph)
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m_glyphsSize[glyph] = Size(node->value<int>(), m_glyphHeight);
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} else
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calculateGlyphsWidthsAutomatically(glyphSize);
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// read custom widths
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if(OTMLNodePtr node = fontNode->get("glyph-widths")) {
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for(const OTMLNodePtr& child : node->children())
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m_glyphsSize[Fw::safeCast<int>(child->tag())].setWidth(child->value<int>());
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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 = m_firstGlyph; glyph < 256; ++glyph) {
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m_glyphsTextureCoords[glyph].setRect(((glyph - m_firstGlyph) % numHorizontalGlyphs) * glyphSize.width(),
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((glyph - m_firstGlyph) / 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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}
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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.getViewportSize() - startPos.toSize();
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Rect screenCoords(startPos, boxSize);
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renderText(text, screenCoords, Fw::AlignTopLeft, 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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Fw::AlignmentFlag 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() || !m_texture)
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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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g_painter.setColor(color);
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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 & Fw::AlignBottom) {
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glyphScreenCoords.translate(0, screenCoords.height() - textBoxSize.height());
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} else if(align & Fw::AlignVerticalCenter) {
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glyphScreenCoords.translate(0, (screenCoords.height() - textBoxSize.height()) / 2);
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} else { // AlignTop
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// nothing to do
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}
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if(align & Fw::AlignRight) {
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glyphScreenCoords.translate(screenCoords.width() - textBoxSize.width(), 0);
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} else if(align & Fw::AlignHorizontalCenter) {
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glyphScreenCoords.translate((screenCoords.width() - textBoxSize.width()) / 2, 0);
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} else { // AlignLeft
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// nothing to do
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}
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// only render glyphs that are after 0, 0
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if(glyphScreenCoords.bottom() < 0 || glyphScreenCoords.right() < 0)
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continue;
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// bound glyph topLeft to 0,0 if needed
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if(glyphScreenCoords.top() < 0) {
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glyphTextureCoords.setTop(glyphTextureCoords.top() - glyphScreenCoords.top());
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glyphScreenCoords.setTop(0);
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}
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if(glyphScreenCoords.left() < 0) {
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glyphTextureCoords.setLeft(glyphTextureCoords.left() - glyphScreenCoords.left());
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glyphScreenCoords.setLeft(0);
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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_painter.drawTexturedRect(glyphScreenCoords, m_texture, glyphTextureCoords);
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}
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}
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const std::vector<Point>& Font::calculateGlyphsPositions(const std::string& text,
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Fw::AlignmentFlag align,
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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->resize(0,m_glyphHeight);
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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 & Fw::AlignRight || align & Fw::AlignHorizontalCenter) || 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() ;
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if((i+1 != textLength && text[i+1] != '\n')) // only add space if letter is not the last or before a \n.
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lineWidths[lines] += 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_yOffset);
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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 & Fw::AlignRight) {
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virtualPos.x = (maxLineWidth - lineWidths[lines]);
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} else if(align & Fw::AlignHorizontalCenter) {
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virtualPos.x = (maxLineWidth - lineWidths[lines]) / 2;
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} else { // AlignLeft
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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, Fw::AlignTopLeft, &size);
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return size;
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}
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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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auto texturePixels = m_texture->getPixels();
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// small AI to auto calculate pixels widths
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for(int glyph = m_firstGlyph; glyph< 256; ++glyph) {
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Rect glyphCoords(((glyph - m_firstGlyph) % numHorizontalGlyphs) * glyphSize.width(),
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((glyph - m_firstGlyph) / 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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int lastColumnFilledPixels = 0;
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bool foundAnything = false;
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for(int x = glyphCoords.left(); x <= glyphCoords.right(); ++x) {
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int columnFilledPixels = 0;
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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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columnFilledPixels++;
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foundAnything = true;
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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(columnFilledPixels == 0 && foundAnything) {
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width = x - glyphCoords.left();
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width += m_glyphSpacing.width();
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if(m_glyphHeight >= 16 && lastColumnFilledPixels >= m_glyphHeight/3)
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width += 1;
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break;
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}
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lastColumnFilledPixels = columnFilledPixels;
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}
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// store glyph size
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m_glyphsSize[glyph].resize(width, m_glyphHeight);
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}
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}
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