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282 lines
9.4 KiB
282 lines
9.4 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 "font.h"
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#include "resources.h"
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#include "textures.h"
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#include "graphics.h"
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Font::Font() :
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m_lineHeight(14),
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m_cursorSize(14),
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m_color(0xFFFFFFFF)
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{
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}
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bool Font::load(const std::string& file)
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{
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if(!g_resources.fileExists(file)) {
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logError("Font file %s does not exists", file.c_str());
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return false;
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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("Empty 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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int numHorizontalGlyphs;
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int firstGlyph;
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Size glyphSize;
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Size textureSize;
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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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doc["line height"] >> m_lineHeight;
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doc["cursor size"] >> m_cursorSize;
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doc["color"] >> m_color;
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doc["first glyph"] >> firstGlyph;
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doc["image glyph size"] >> glyphSize;
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doc["image"] >> textureName;
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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 \"%s\"", file.c_str());
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return false;
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}
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textureSize = m_texture->getSize();
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numHorizontalGlyphs = textureSize.width() / glyphSize.width();
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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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// calculate glyph texture coords
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m_glyphsTextureCoords[glyph].setRect(((glyph - firstGlyph) % numHorizontalGlyphs) * glyphSize.width(),
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((glyph - firstGlyph) / numHorizontalGlyphs) * glyphSize.height(),
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glyphWidth,
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glyphSize.height());
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// store glyph size
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m_glyphsSize[glyph].setHeight(glyphSize.height());
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m_glyphsSize[glyph].setWidth(glyphWidth);
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}
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} catch (YAML::ParserException& e) {
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logError("Malformed font file \"%s\"", file.c_str());
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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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{
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Size boxSize = g_graphics.getScreenSize() - startPos.toSize();
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Rect screenCoords(startPos, boxSize);
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Font::renderText(text, screenCoords);
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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 Point& startInternalPos,
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bool debug)
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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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// begin texture rendering
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g_graphics.setColor(m_color);
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g_graphics._beginTextureRender(m_texture.get());
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const Size& textureSize = m_texture->getSize();
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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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Point *glyphsPositions = calculateGlyphsPositions(text, align, &textBoxSize);
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for(int i = 0; i < textLenght; ++i) {
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int glyph = (int)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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// only render glyphs that are after startRenderPosition
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if(glyphScreenCoords.bottom() < startInternalPos.y || glyphScreenCoords.right() < startInternalPos.x)
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continue;
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// bound glyph topLeft to startRenderPosition
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if(glyphScreenCoords.top() < startInternalPos.y) {
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glyphTextureCoords.setTop(glyphTextureCoords.top() + (startInternalPos.y - glyphScreenCoords.top()));
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glyphScreenCoords.setTop(startInternalPos.y);
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}
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if(glyphScreenCoords.left() < startInternalPos.x) {
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glyphTextureCoords.setLeft(glyphTextureCoords.left() + (startInternalPos.x - glyphScreenCoords.left()));
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glyphScreenCoords.setLeft(startInternalPos.x);
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}
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// subtract startInternalPos
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glyphScreenCoords.translate(-startInternalPos);
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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, glyphTextureCoords, textureSize);
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}
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// end texture redering
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g_graphics._endTextureRender();
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g_graphics.resetColor();
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if(debug)
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g_graphics.drawBoundingRect(screenCoords.expanded(1), Color(0xFF00FF00), 1);
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}
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Point* Font::calculateGlyphsPositions(const std::string& text, int align, Size *textBoxSize)
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{
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static Point glyphsPositions[8192];
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static int lineWidths[512];
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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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// protect buffer overflow on glyphsPostions
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int numGlyphs = text.length();
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if(numGlyphs > 8192)
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logFatal("A text was too long to render!");
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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< numGlyphs; ++i) {
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glyph = (int)text[i];
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if(glyph == (uchar)'\n') {
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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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maxLineWidth = std::max(maxLineWidth, lineWidths[lines]);
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}
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}
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}
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Point virtualPos;
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lines = 0;
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for(i = 0; i < numGlyphs; ++i) {
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glyph = (int)text[i];
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// store current glyph topLeft
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glyphsPositions[i] = virtualPos;
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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_lineHeight;
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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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// 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();
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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_lineHeight);
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}
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return (Point *)glyphsPositions;
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}
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Size Font::calculateTextBoxSize(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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