tibia-client/src/framework/graphics/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 <prerequisites.h>
#include <core/resources.h>
#include <graphics/font.h>
#include <graphics/textures.h>
#include <graphics/graphics.h>
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void Font::calculateGlyphsWidthsAutomatically(const Size& glyphSize)
{
int numHorizontalGlyphs = m_texture->getSize().width() / glyphSize.width();
uchar *texturePixels = m_texture->getPixels();
// small AI to auto calculate pixels widths
for(int glyph = 32; glyph< 256; ++glyph) {
Rect glyphCoords(((glyph - 32) % numHorizontalGlyphs) * glyphSize.width(),
((glyph - 32) / numHorizontalGlyphs) * glyphSize.height(),
glyphSize.width(),
m_glyphHeight);
int width = glyphSize.width();
for(int x = glyphCoords.left() + 2; x <= glyphCoords.right(); ++x) {
bool allAlpha = true;
// check if all vertical pixels are alpha
for(int y = glyphCoords.top(); y <= glyphCoords.bottom(); ++y) {
if(texturePixels[(y * m_texture->getSize().width() * 4) + (x*4) + 3] != 0) {
allAlpha = false;
break;
}
}
// if all pixels were alpha we found the width
if(allAlpha) {
width = x - glyphCoords.left();
break;
}
}
// store glyph size
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m_glyphsSize[glyph].setSize(width, m_glyphHeight);
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}
delete[] texturePixels;
}
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bool Font::load(const std::string& file)
{
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std::string fileContents = g_resources.loadTextFile(file);
if(!fileContents.size()) {
flogError("ERROR: Coult not load font file \"%s", file.c_str());
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return false;
}
std::istringstream fin(fileContents);
std::string textureName;
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Size glyphSize;
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try {
YAML::Parser parser(fin);
YAML::Node doc;
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
if(doc.FindValue("glyph spacing"))
doc["glyph spacing"] >> m_glyphSpacing;
if(doc.FindValue("top margin"))
doc["top margin"] >> m_topMargin;
// load texture
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m_texture = g_textures.get("fonts/" + textureName);
if(!m_texture) {
flogError("ERROR: Failed to load image for font file \"%s\"", file.c_str());
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return false;
}
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// auto calculate widths
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calculateGlyphsWidthsAutomatically(glyphSize);
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// read custom widths
if(doc.FindValue("glyph widths")) {
const YAML::Node& widthsNode = doc["glyph widths"];
for(auto it = widthsNode.begin(); it != widthsNode.end(); ++it) {
int glyph, glyphWidth;
it.first() >> glyph;
it.second() >> glyphWidth;
m_glyphsSize[glyph].setWidth(glyphWidth);
}
}
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// calculate glyphs texture coords
int numHorizontalGlyphs = m_texture->getSize().width() / glyphSize.width();
for(int glyph = 32; glyph< 256; ++glyph) {
m_glyphsTextureCoords[glyph].setRect(((glyph - 32) % numHorizontalGlyphs) * glyphSize.width(),
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((glyph - 32) / numHorizontalGlyphs) * glyphSize.height(),
m_glyphsSize[glyph].width(),
m_glyphHeight);
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}
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} catch (YAML::Exception& e) {
flogError("ERROR: Malformed font file \"%s\":\n %s", file.c_str() % e.what());
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return false;
}
return true;
}
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void Font::renderText(const std::string& text,
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const Point& startPos,
const Color& color)
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{
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Size boxSize = g_graphics.getScreenSize() - startPos.toSize();
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,
const Rect& screenCoords,
int align,
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const Color& color)
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{
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// prevent glitches from invalid rects
if(!screenCoords.isValid())
return;
int textLenght = text.length();
// map glyphs positions
Size textBoxSize;
const std::vector<Point>& glyphsPositions = calculateGlyphsPositions(text, align, &textBoxSize);
for(int i = 0; i < textLenght; ++i) {
int glyph = (uchar)text[i];
// skip invalid glyphs
if(glyph < 32)
continue;
// calculate initial glyph rect and texture coords
Rect glyphScreenCoords(glyphsPositions[i], m_glyphsSize[glyph]);
Rect glyphTextureCoords = m_glyphsTextureCoords[glyph];
// first translate to align position
if(align & ALIGN_BOTTOM) {
glyphScreenCoords.translate(0, screenCoords.height() - textBoxSize.height());
} else if(align & ALIGN_VERTICAL_CENTER) {
glyphScreenCoords.translate(0, (screenCoords.height() - textBoxSize.height()) / 2);
} else { // ALIGN_TOP
// nothing to do
}
if(align & ALIGN_RIGHT) {
glyphScreenCoords.translate(screenCoords.width() - textBoxSize.width(), 0);
} else if(align & ALIGN_HORIZONTAL_CENTER) {
glyphScreenCoords.translate((screenCoords.width() - textBoxSize.width()) / 2, 0);
} else { // ALIGN_TOP
// nothing to do
}
// translate rect to screen coords
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, m_texture, glyphTextureCoords, color);
}
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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
static std::vector<Point> glyphsPositions(1);
static std::vector<int> lineWidths(1);
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int textLength = text.length();
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int maxLineWidth = 0;
int lines = 0;
int glyph;
int i;
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// return if there is no text
if(textLength == 0) {
if(textBoxSize)
textBoxSize->setSize(0,0);
return glyphsPositions;
}
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// resize glyphsPositions vector when needed
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if(textLength > (int)glyphsPositions.size())
glyphsPositions.resize(textLength);
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// calculate lines width
if((align & ALIGN_RIGHT || align & ALIGN_HORIZONTAL_CENTER) || textBoxSize) {
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++;
if(lines+1 > (int)lineWidths.size())
lineWidths.resize(lines+1);
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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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
if(glyph == (uchar)'\n' || i == 0) {
if(glyph == (uchar)'\n') {
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virtualPos.y += m_glyphHeight + m_glyphSpacing.height();
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lines++;
}
// calculate start x pos
if(align & ALIGN_RIGHT) {
virtualPos.x = (maxLineWidth - lineWidths[lines]);
} else if(align & ALIGN_HORIZONTAL_CENTER) {
virtualPos.x = (maxLineWidth - lineWidths[lines]) / 2;
} else { // ALIGN_LEFT
virtualPos.x = 0;
}
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}
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// store current glyph topLeft
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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if(textBoxSize) {
textBoxSize->setWidth(maxLineWidth);
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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{
Size size;
calculateGlyphsPositions(text, ALIGN_TOP_LEFT, &size);
return size;
}
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