tibia-client/src/framework/font.cpp

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/* The MIT License
*
* Copyright (c) 2010 OTClient, https://github.com/edubart/otclient
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
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#include "font.h"
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#include "resources.h"
#include "textures.h"
#include "graphics.h"
Font::Font() :
m_lineHeight(14),
m_cursorSize(14),
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m_color(0xFFFFFFFF)
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{
}
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bool Font::load(const std::string& file)
{
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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;
}
std::string fileContents = g_resources.loadTextFile(file);
if(!fileContents.size()) {
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logError("Empty font file \"%s", file.c_str());
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return false;
}
std::istringstream fin(fileContents);
std::string textureName;
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int numHorizontalGlyphs;
int firstGlyph;
Size glyphSize;
Size textureSize;
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try {
YAML::Parser parser(fin);
YAML::Node doc;
parser.GetNextDocument(doc);
doc["line height"] >> m_lineHeight;
doc["cursor size"] >> m_cursorSize;
doc["color"] >> m_color;
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doc["first glyph"] >> firstGlyph;
doc["image glyph size"] >> glyphSize;
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doc["image"] >> textureName;
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m_texture = g_textures.get("fonts/" + textureName);
if(!m_texture) {
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logError("Failed to load image for font \"%s\"", file.c_str());
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return false;
}
textureSize = m_texture->getSize();
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;
it.first() >> glyph;
it.second() >> glyphWidth;
// calculate glyph texture coords
m_glyphsTextureCoords[glyph].setRect(((glyph - firstGlyph) % numHorizontalGlyphs) * glyphSize.width(),
((glyph - firstGlyph) / numHorizontalGlyphs) * glyphSize.height(),
glyphWidth,
glyphSize.height());
// store glyph size
m_glyphsSize[glyph].setHeight(glyphSize.height());
m_glyphsSize[glyph].setWidth(glyphWidth);
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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;
}
return true;
}
void Font::renderText(const Point& pos, const std::string& text)
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{
Size boxSize = g_graphics.getScreenSize() - pos.toSize();
Rect screenCoords(pos, boxSize);
Font::renderText(screenCoords, text);
}
void Font::renderText(const Rect& screenCoords, const std::string& text, const Point& startRenderPosition, bool debug)
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{
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// begin texture rendering
g_graphics.setColor(m_color);
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
Point *glyphsPositions = mapGlyphsPositions(text);
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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
if(glyph < 32)
continue;
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// calculate virtual glyph rect
Rect glyphScreenCoords(glyphsPositions[i], m_glyphsSize[glyph]);
Rect glyphTextureCoords = m_glyphsTextureCoords[glyph];
// only render glyphs that is visible after startRenderPosition
if(glyphScreenCoords.bottom() < startRenderPosition.y || glyphScreenCoords.right() < startRenderPosition.x)
continue;
// bound glyph topLeft to startRenderPosition
if(glyphScreenCoords.top() < startRenderPosition.y) {
glyphTextureCoords.setTop(glyphTextureCoords.top() + (startRenderPosition.y - glyphScreenCoords.top()));
glyphScreenCoords.setTop(startRenderPosition.y);
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}
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if(glyphScreenCoords.left() < startRenderPosition.x) {
glyphTextureCoords.setLeft(glyphTextureCoords.left() + (startRenderPosition.x - glyphScreenCoords.left()));
glyphScreenCoords.setLeft(startRenderPosition.x);
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}
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// translate glyph
glyphScreenCoords.translate(-startRenderPosition);
glyphScreenCoords.translate(screenCoords.topLeft());
// only render if glyph rect is visible on screenCoords
if(!screenCoords.intersects(glyphScreenCoords))
continue;
// bound glyph bottomRight to screenCoords bottomRight
if(glyphScreenCoords.bottom() > screenCoords.bottom()) {
glyphTextureCoords.setBottom(glyphTextureCoords.bottom() + (screenCoords.bottom() - glyphScreenCoords.bottom()));
glyphScreenCoords.setBottom(screenCoords.bottom());
}
if(glyphScreenCoords.right() > screenCoords.right()) {
glyphTextureCoords.setRight(glyphTextureCoords.right() + (screenCoords.right() - glyphScreenCoords.right()));
glyphScreenCoords.setRight(screenCoords.right());
}
// render glyph
g_graphics._drawTexturedRect(glyphScreenCoords, glyphTextureCoords, textureSize);
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}
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// end texture redering
g_graphics._endTextureRender();
g_graphics.resetColor();
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if(debug)
g_graphics.drawBoundingRect(screenCoords.expanded(1), Color(0xFF00FF00), 1);
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}
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Size Font::calculateTextSize(const std::string& text, Point *glyphsPositions)
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{
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if(!glyphsPositions) {
glyphsPositions = mapGlyphsPositions(text);
}
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Size size;
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int numGlyphs = text.length();
for(int i = 0; i < numGlyphs; ++i) {
Point bottomLeft = glyphsPositions[i] + m_glyphsSize[(int)text[i]].toPoint();
size = size.expandedTo(bottomLeft.toSize());
}
return size;
}
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Point* Font::mapGlyphsPositions(const std::string& text)
{
static Point glyphsPositions[8192];
int numGlyphs = text.length();
Point virtualPos;
if(numGlyphs > 8192)
logFatal("A text was too long to render!");
for(int i = 0; i < numGlyphs; ++i) {
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int glyph = (int)text[i];
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// store current glyph topLeft
glyphsPositions[i] = virtualPos;
// new line
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if(glyph == (uchar)'\n') {
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virtualPos.y += m_lineHeight;
virtualPos.x = 0;
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}
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// render only if the glyph is valid
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else if(glyph >= 32) {
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virtualPos.x += m_glyphsSize[glyph].width();
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}
}
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return (Point *)glyphsPositions;
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}