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colobot/src/graphics/engine/text.cpp

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// * This file is part of the COLOBOT source code
// * Copyright (C) 2001-2008, Daniel ROUX & EPSITEC SA, www.epsitec.ch
// * Copyright (C) 2012, Polish Portal of Colobot (PPC)
// *
// * This program is free software: you can redistribute it and/or modify
// * it under the terms of the GNU General Public License as published by
// * the Free Software Foundation, either version 3 of the License, or
// * (at your option) any later version.
// *
// * This program is distributed in the hope that it will be useful,
// * but WITHOUT ANY WARRANTY; without even the implied warranty of
// * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// * GNU General Public License for more details.
// *
// * You should have received a copy of the GNU General Public License
// * along with this program. If not, see http://www.gnu.org/licenses/.
// text.cpp
#include "graphics/engine/text.h"
#include "app/app.h"
#include "common/image.h"
#include "common/iman.h"
#include "common/logger.h"
#include "common/stringutils.h"
#include "math/func.h"
#include <SDL/SDL.h>
#include <SDL/SDL_ttf.h>
namespace Gfx
{
/**
\struct CachedFont
\brief Base TTF font with UTF-8 char cache */
struct CachedFont
{
TTF_Font* font;
std::map<Gfx::UTF8Char, Gfx::CharTexture> cache;
CachedFont() : font(nullptr) {}
};
};
Gfx::CText::CText(CInstanceManager *iMan, Gfx::CEngine* engine)
{
m_iMan = iMan;
m_iMan->AddInstance(CLASS_TEXT, this);
m_device = nullptr;
m_engine = engine;
m_defaultSize = 12.0f;
m_fontPath = "fonts";
m_lastFontType = Gfx::FONT_COLOBOT;
m_lastFontSize = 0;
m_lastCachedFont = nullptr;
}
Gfx::CText::~CText()
{
m_iMan->DeleteInstance(CLASS_TEXT, this);
m_iMan = nullptr;
m_device = nullptr;
m_engine = nullptr;
}
bool Gfx::CText::Create()
{
if (TTF_Init() != 0)
{
m_error = std::string("TTF_Init error: ") + std::string(TTF_GetError());
return false;
}
m_fonts[Gfx::FONT_COLOBOT] = new MultisizeFont("dvu_sans.ttf");
m_fonts[Gfx::FONT_COLOBOT_BOLD] = new MultisizeFont("dvu_sans_bold.ttf");
m_fonts[Gfx::FONT_COLOBOT_ITALIC] = new MultisizeFont("dvu_sans_italic.ttf");
m_fonts[Gfx::FONT_COURIER] = new MultisizeFont("dvu_sans_mono.ttf");
m_fonts[Gfx::FONT_COURIER_BOLD] = new MultisizeFont("dvu_sans_mono_bold.ttf");
for (auto it = m_fonts.begin(); it != m_fonts.end(); ++it)
{
Gfx::FontType type = (*it).first;
CachedFont* cf = GetOrOpenFont(type, m_defaultSize);
if (cf == nullptr || cf->font == nullptr)
return false;
}
return true;
}
void Gfx::CText::Destroy()
{
for (auto it = m_fonts.begin(); it != m_fonts.end(); ++it)
{
MultisizeFont* mf = (*it).second;
for (auto jt = mf->fonts.begin(); jt != mf->fonts.end(); ++jt)
{
CachedFont* cf = (*jt).second;
TTF_CloseFont(cf->font);
cf->font = nullptr;
delete cf;
}
mf->fonts.clear();
delete mf;
}
m_fonts.clear();
m_lastCachedFont = nullptr;
TTF_Quit();
}
void Gfx::CText::SetDevice(Gfx::CDevice* device)
{
m_device = device;
}
std::string Gfx::CText::GetError()
{
return m_error;
}
void Gfx::CText::FlushCache()
{
for (auto it = m_fonts.begin(); it != m_fonts.end(); ++it)
{
MultisizeFont *mf = (*it).second;
for (auto jt = mf->fonts.begin(); jt != mf->fonts.end(); ++jt)
{
CachedFont *f = (*jt).second;
f->cache.clear();
}
}
}
void Gfx::CText::DrawText(const std::string &text, const std::vector<FontMetaChar> &format,
float size, Math::Point pos, float width, Gfx::TextAlign align,
int eol)
{
float sw = 0.0f;
if (align == Gfx::TEXT_ALIGN_CENTER)
{
sw = GetStringWidth(text, format, size);
if (sw > width) sw = width;
pos.x -= sw / 2.0f;
}
else if (align == Gfx::TEXT_ALIGN_RIGHT)
{
sw = GetStringWidth(text, format, size);
if (sw > width) sw = width;
pos.x -= sw;
}
DrawString(text, format, size, pos, width, eol);
}
void Gfx::CText::DrawText(const std::string &text, Gfx::FontType font,
float size, Math::Point pos, float width, Gfx::TextAlign align,
int eol)
{
float sw = 0.0f;
if (align == Gfx::TEXT_ALIGN_CENTER)
{
sw = GetStringWidth(text, font, size);
if (sw > width) sw = width;
pos.x -= sw / 2.0f;
}
else if (align == Gfx::TEXT_ALIGN_RIGHT)
{
sw = GetStringWidth(text, font, size);
if (sw > width) sw = width;
pos.x -= sw;
}
DrawString(text, font, size, pos, width, eol);
}
void Gfx::CText::SizeText(const std::string &text, const std::vector<FontMetaChar> &format,
float size, Math::Point pos, Gfx::TextAlign align,
Math::Point &start, Math::Point &end)
{
start = end = pos;
float sw = GetStringWidth(text, format, size);
end.x += sw;
if (align == Gfx::TEXT_ALIGN_CENTER)
{
start.x -= sw/2.0f;
end.x -= sw/2.0f;
}
else if (align == Gfx::TEXT_ALIGN_RIGHT)
{
start.x -= sw;
end.x -= sw;
}
start.y -= GetDescent(Gfx::FONT_COLOBOT, size);
end.y += GetAscent(Gfx::FONT_COLOBOT, size);
}
void Gfx::CText::SizeText(const std::string &text, Gfx::FontType font,
float size, Math::Point pos, Gfx::TextAlign align,
Math::Point &start, Math::Point &end)
{
start = end = pos;
float sw = GetStringWidth(text, font, size);
end.x += sw;
if (align == Gfx::TEXT_ALIGN_CENTER)
{
start.x -= sw/2.0f;
end.x -= sw/2.0f;
}
else if (align == Gfx::TEXT_ALIGN_RIGHT)
{
start.x -= sw;
end.x -= sw;
}
start.y -= GetDescent(font, size);
end.y += GetAscent(font, size);
}
float Gfx::CText::GetAscent(Gfx::FontType font, float size)
{
assert(font != Gfx::FONT_BUTTON);
Gfx::CachedFont* cf = GetOrOpenFont(font, size);
assert(cf != nullptr);
Math::IntPoint wndSize;
wndSize.y = TTF_FontAscent(cf->font);
Math::Point ifSize = m_engine->WindowToInterfaceSize(wndSize);
return ifSize.y;
}
float Gfx::CText::GetDescent(Gfx::FontType font, float size)
{
assert(font != Gfx::FONT_BUTTON);
Gfx::CachedFont* cf = GetOrOpenFont(font, size);
assert(cf != nullptr);
Math::IntPoint wndSize;
wndSize.y = TTF_FontDescent(cf->font);
Math::Point ifSize = m_engine->WindowToInterfaceSize(wndSize);
return ifSize.y;
}
float Gfx::CText::GetHeight(Gfx::FontType font, float size)
{
assert(font != Gfx::FONT_BUTTON);
Gfx::CachedFont* cf = GetOrOpenFont(font, size);
assert(cf != nullptr);
Math::IntPoint wndSize;
wndSize.y = TTF_FontHeight(cf->font);
Math::Point ifSize = m_engine->WindowToInterfaceSize(wndSize);
return ifSize.y;
}
float Gfx::CText::GetStringWidth(const std::string &text,
const std::vector<FontMetaChar> &format, float size)
{
assert(StrUtils::Utf8StringLength(text) == format.size());
float width = 0.0f;
unsigned int index = 0;
unsigned int fmtIndex = 0;
while (index < text.length())
{
Gfx::FontType font = static_cast<Gfx::FontType>(format[fmtIndex] & Gfx::FONT_MASK_FONT);
Gfx::UTF8Char ch;
int len = StrUtils::Utf8CharSizeAt(text, index);
if (len >= 1)
ch.c1 = text[index];
if (len >= 2)
ch.c2 = text[index+1];
if (len >= 3)
ch.c3 = text[index+2];
width += GetCharWidth(ch, font, size, width);
index += len;
fmtIndex++;
}
return width;
}
float Gfx::CText::GetStringWidth(const std::string &text, Gfx::FontType font, float size)
{
assert(font != Gfx::FONT_BUTTON);
// TODO: special chars?
Gfx::CachedFont* cf = GetOrOpenFont(font, size);
assert(cf != nullptr);
Math::IntPoint wndSize;
TTF_SizeUTF8(cf->font, text.c_str(), &wndSize.x, &wndSize.y);
Math::Point ifSize = m_engine->WindowToInterfaceSize(wndSize);
return ifSize.x;
}
float Gfx::CText::GetCharWidth(Gfx::UTF8Char ch, Gfx::FontType font, float size, float offset)
{
// TODO: if (font == Gfx::FONT_BUTTON)
if (font == Gfx::FONT_BUTTON) return 0.0f;
// TODO: special chars?
// TODO: tab sizing
Gfx::CachedFont* cf = GetOrOpenFont(font, size);
assert(cf != nullptr);
Gfx::CharTexture tex;
auto it = cf->cache.find(ch);
if (it != cf->cache.end())
tex = (*it).second;
else
tex = CreateCharTexture(ch, cf);
return tex.charSize.x;
}
int Gfx::CText::Justify(const std::string &text, const std::vector<FontMetaChar> &format,
float size, float width)
{
assert(StrUtils::Utf8StringLength(text) == format.size());
float pos = 0.0f;
int cut = 0;
unsigned int index = 0;
unsigned int fmtIndex = 0;
while (index < text.length())
{
Gfx::FontType font = static_cast<Gfx::FontType>(format[fmtIndex] & Gfx::FONT_MASK_FONT);
Gfx::UTF8Char ch;
int len = StrUtils::Utf8CharSizeAt(text, index);
if (len >= 1)
ch.c1 = text[index];
if (len >= 2)
ch.c2 = text[index+1];
if (len >= 3)
ch.c3 = text[index+2];
if (font != Gfx::FONT_BUTTON)
{
if (ch.c1 == '\n')
return index+1;
if (ch.c1 == ' ')
cut = index+1;
}
pos += GetCharWidth(ch, font, size, pos);
if (pos > width)
{
if (cut == 0) return index;
else return cut;
}
index += len;
fmtIndex++;
}
return index;
}
int Gfx::CText::Justify(const std::string &text, Gfx::FontType font, float size, float width)
{
assert(font != Gfx::FONT_BUTTON);
float pos = 0.0f;
int cut = 0;
unsigned int index = 0;
while (index < text.length())
{
Gfx::UTF8Char ch;
int len = StrUtils::Utf8CharSizeAt(text, index);
if (len >= 1)
ch.c1 = text[index];
if (len >= 2)
ch.c2 = text[index+1];
if (len >= 3)
ch.c3 = text[index+2];
index += len;
if (ch.c1 == '\n')
return index+1;
if (ch.c1 == ' ' )
cut = index+1;
pos += GetCharWidth(ch, font, size, pos);
if (pos > width)
{
if (cut == 0) return index;
else return cut;
}
}
return index;
}
int Gfx::CText::Detect(const std::string &text, const std::vector<FontMetaChar> &format,
float size, float offset)
{
assert(StrUtils::Utf8StringLength(text) == format.size());
float pos = 0.0f;
unsigned int index = 0;
unsigned int fmtIndex = 0;
while (index < text.length())
{
Gfx::FontType font = static_cast<Gfx::FontType>(format[fmtIndex] & Gfx::FONT_MASK_FONT);
// TODO: if (font == Gfx::FONT_BUTTON)
if (font == Gfx::FONT_BUTTON) continue;
Gfx::UTF8Char ch;
int len = StrUtils::Utf8CharSizeAt(text, index);
if (len >= 1)
ch.c1 = text[index];
if (len >= 2)
ch.c2 = text[index+1];
if (len >= 3)
ch.c3 = text[index+2];
if (ch.c1 == '\n')
return index;
float width = GetCharWidth(ch, font, size, pos);
if (offset <= pos + width/2.0f)
return index;
pos += width;
index += len;
fmtIndex++;
}
return index;
}
int Gfx::CText::Detect(const std::string &text, Gfx::FontType font, float size, float offset)
{
assert(font != Gfx::FONT_BUTTON);
float pos = 0.0f;
unsigned int index = 0;
while (index < text.length())
{
Gfx::UTF8Char ch;
int len = StrUtils::Utf8CharSizeAt(text, index);
if (len >= 1)
ch.c1 = text[index];
if (len >= 2)
ch.c2 = text[index+1];
if (len >= 3)
ch.c3 = text[index+2];
index += len;
if (ch.c1 == '\n')
return index;
float width = GetCharWidth(ch, font, size, pos);
if (offset <= pos + width/2.0f)
return index;
pos += width;
}
return index;
}
void Gfx::CText::DrawString(const std::string &text, const std::vector<FontMetaChar> &format,
float size, Math::Point pos, float width, int eol)
{
assert(StrUtils::Utf8StringLength(text) == format.size());
m_engine->SetState(Gfx::ENG_RSTATE_TEXT);
Gfx::FontType font = Gfx::FONT_COLOBOT;
float start = pos.x;
unsigned int index = 0;
unsigned int fmtIndex = 0;
while (index < text.length())
{
font = static_cast<Gfx::FontType>(format[fmtIndex] & Gfx::FONT_MASK_FONT);
// TODO: if (font == Gfx::FONT_BUTTON)
if (font == Gfx::FONT_BUTTON) continue;
Gfx::UTF8Char ch;
int len = StrUtils::Utf8CharSizeAt(text, index);
if (len >= 1)
ch.c1 = text[index];
if (len >= 2)
ch.c2 = text[index+1];
if (len >= 3)
ch.c3 = text[index+2];
float offset = pos.x - start;
float cw = GetCharWidth(ch, font, size, offset);
if (offset + cw > width) // exceeds the maximum width?
{
// TODO: special end-of-line char
break;
}
Gfx::FontHighlight hl = static_cast<Gfx::FontHighlight>(format[fmtIndex] & Gfx::FONT_MASK_HIGHLIGHT);
if (hl != Gfx::FONT_HIGHLIGHT_NONE)
{
Math::Point charSize;
charSize.x = GetCharWidth(ch, font, size, offset);
charSize.y = GetHeight(font, size);
DrawHighlight(hl, pos, charSize);
}
DrawChar(ch, font, size, pos);
index += len;
fmtIndex++;
}
// TODO: eol
}
void Gfx::CText::DrawString(const std::string &text, Gfx::FontType font,
float size, Math::Point pos, float width, int eol)
{
assert(font != Gfx::FONT_BUTTON);
m_engine->SetState(Gfx::ENG_RSTATE_TEXT);
unsigned int index = 0;
while (index < text.length())
{
Gfx::UTF8Char ch;
int len = StrUtils::Utf8CharSizeAt(text, index);
if (len >= 1)
ch.c1 = text[index];
if (len >= 2)
ch.c2 = text[index+1];
if (len >= 3)
ch.c3 = text[index+2];
index += len;
DrawChar(ch, font, size, pos);
}
}
void Gfx::CText::DrawHighlight(Gfx::FontHighlight hl, Math::Point pos, Math::Point size)
{
// Gradient colors
Gfx::Color grad[4];
// TODO: switch to alpha factors
switch (hl)
{
case Gfx::FONT_HIGHLIGHT_LINK:
grad[0] = grad[1] = grad[2] = grad[3] = Gfx::Color(0.0f, 0.0f, 1.0f, 0.5f);
break;
case Gfx::FONT_HIGHLIGHT_TOKEN:
grad[0] = grad[1] = Gfx::Color(248.0f / 256.0f, 248.0f / 256.0f, 248.0f / 256.0f, 0.5f);
grad[2] = grad[3] = Gfx::Color(248.0f / 256.0f, 220.0f / 256.0f, 188.0f / 256.0f, 0.5f);
break;
case Gfx::FONT_HIGHLIGHT_TYPE:
grad[0] = grad[1] = Gfx::Color(248.0f / 256.0f, 248.0f / 256.0f, 248.0f / 256.0f, 0.5f);
grad[2] = grad[3] = Gfx::Color(169.0f / 256.0f, 234.0f / 256.0f, 169.0f / 256.0f, 0.5f);
break;
case Gfx::FONT_HIGHLIGHT_CONST:
grad[0] = grad[1] = Gfx::Color(248.0f / 256.0f, 248.0f / 256.0f, 248.0f / 256.0f, 0.5f);
grad[2] = grad[3] = Gfx::Color(248.0f / 256.0f, 176.0f / 256.0f, 169.0f / 256.0f, 0.5f);
break;
case Gfx::FONT_HIGHLIGHT_REM:
grad[0] = grad[1] = Gfx::Color(248.0f / 256.0f, 248.0f / 256.0f, 248.0f / 256.0f, 0.5f);
grad[2] = grad[3] = Gfx::Color(248.0f / 256.0f, 169.0f / 256.0f, 248.0f / 256.0f, 0.5f);
break;
case Gfx::FONT_HIGHLIGHT_KEY:
grad[0] = grad[1] = grad[2] = grad[3] =
Gfx::Color(192.0f / 256.0f, 192.0f / 256.0f, 192.0f / 256.0f, 0.5f);
break;
default:
return;
}
Math::IntPoint vsize = m_engine->GetWindowSize();
float h = 0.0f;
if (vsize.y <= 768.0f) // 1024x768 or less?
h = 1.01f / vsize.y; // 1 pixel
else // more than 1024x768?
h = 2.0f / vsize.y; // 2 pixels
Math::Point p1, p2;
p1.x = pos.x;
p2.x = pos.x + size.x;
if (hl == Gfx::FONT_HIGHLIGHT_LINK)
{
p1.y = pos.y;
p2.y = pos.y + h; // just emphasized
}
else
{
p1.y = pos.y;
p2.y = pos.y + size.y;
}
m_device->SetRenderState(Gfx::RENDER_STATE_TEXTURING, false);
Gfx::VertexCol quad[] =
{
Gfx::VertexCol(Math::Vector(p1.x, p1.y, 0.0f), grad[3]),
Gfx::VertexCol(Math::Vector(p1.x, p2.y, 0.0f), grad[0]),
Gfx::VertexCol(Math::Vector(p2.x, p1.y, 0.0f), grad[2]),
Gfx::VertexCol(Math::Vector(p2.x, p2.y, 0.0f), grad[1])
};
m_device->DrawPrimitive(Gfx::PRIMITIVE_TRIANGLE_STRIP, quad, 4);
m_engine->AddStatisticTriangle(2);
m_device->SetRenderState(Gfx::RENDER_STATE_TEXTURING, true);
}
void Gfx::CText::DrawChar(Gfx::UTF8Char ch, Gfx::FontType font, float size, Math::Point &pos)
{
// TODO: if (font == Gfx::FONT_BUTTON)
if (font == Gfx::FONT_BUTTON) return;
// TODO: special chars?
CachedFont* cf = GetOrOpenFont(font, size);
if (cf == nullptr)
return;
auto it = cf->cache.find(ch);
CharTexture tex;
if (it != cf->cache.end())
{
tex = (*it).second;
}
else
{
tex = CreateCharTexture(ch, cf);
if (tex.id == 0) // invalid
return;
cf->cache[ch] = tex;
}
Math::Point p1(pos.x, pos.y + tex.charSize.y - tex.texSize.y);
Math::Point p2(pos.x + tex.texSize.x, pos.y + tex.charSize.y);
Math::Vector n(0.0f, 0.0f, -1.0f); // normal
Gfx::Vertex quad[4] =
{
Gfx::Vertex(Math::Vector(p1.x, p1.y, 0.0f), n, Math::Point(0.0f, 1.0f)),
Gfx::Vertex(Math::Vector(p1.x, p2.y, 0.0f), n, Math::Point(0.0f, 0.0f)),
Gfx::Vertex(Math::Vector(p2.x, p1.y, 0.0f), n, Math::Point(1.0f, 1.0f)),
Gfx::Vertex(Math::Vector(p2.x, p2.y, 0.0f), n, Math::Point(1.0f, 0.0f))
};
m_device->SetTexture(0, tex.id);
m_device->DrawPrimitive(Gfx::PRIMITIVE_TRIANGLE_STRIP, quad, 4);
m_engine->AddStatisticTriangle(2);
pos.x += tex.charSize.x;
}
Gfx::CachedFont* Gfx::CText::GetOrOpenFont(Gfx::FontType font, float size)
{
// TODO: sizing
int pointSize = static_cast<int>(size);
if (m_lastCachedFont != nullptr)
{
if (m_lastFontType == font && m_lastFontSize == pointSize)
return m_lastCachedFont;
}
auto it = m_fonts.find(font);
if (it == m_fonts.end())
{
m_error = std::string("Invalid font type ") + StrUtils::ToString<int>(static_cast<int>(font));
return nullptr;
}
MultisizeFont* mf = (*it).second;
auto jt = mf->fonts.find(pointSize);
if (jt != mf->fonts.end())
{
m_lastCachedFont = (*jt).second;
m_lastFontType = font;
m_lastFontSize = pointSize;
return m_lastCachedFont;
}
std::string path = CApplication::GetInstance().GetDataFilePath(m_fontPath, mf->fileName);
m_lastCachedFont = new CachedFont();
m_lastCachedFont->font = TTF_OpenFont(path.c_str(), pointSize);
if (m_lastCachedFont->font == nullptr)
m_error = std::string("TTF_OpenFont error ") + std::string(TTF_GetError());
mf->fonts[pointSize] = m_lastCachedFont;
return m_lastCachedFont;
}
Gfx::CharTexture Gfx::CText::CreateCharTexture(Gfx::UTF8Char ch, Gfx::CachedFont* font)
{
CharTexture texture;
SDL_Surface* textSurface = nullptr;
SDL_Color white = {255, 255, 255, 0};
char str[] = { ch.c1, ch.c2, ch.c3, '\0' };
textSurface = TTF_RenderUTF8_Blended(font->font, str, white);
if (textSurface == nullptr)
{
m_error = "TTF_Render error";
return texture;
}
int w = Math::NextPowerOfTwo(textSurface->w);
int h = Math::NextPowerOfTwo(textSurface->h);
textSurface->flags = textSurface->flags & (~SDL_SRCALPHA);
SDL_Surface* textureSurface = SDL_CreateRGBSurface(0, w, h, 32, 0x00ff0000, 0x0000ff00,
0x000000ff, 0xff000000);
SDL_BlitSurface(textSurface, NULL, textureSurface, NULL);
ImageData data;
data.surface = textureSurface;
Gfx::TextureCreateParams createParams;
createParams.format = Gfx::TEX_IMG_RGBA;
createParams.minFilter = Gfx::TEX_MIN_FILTER_NEAREST;
createParams.magFilter = Gfx::TEX_MAG_FILTER_NEAREST;
createParams.mipmap = false;
Gfx::Texture tex = m_device->CreateTexture(&data, createParams);
data.surface = nullptr;
if (! tex.Valid())
{
m_error = "Texture create error";
return texture;
}
else
{
texture.id = tex.id;
texture.texSize = m_engine->WindowToInterfaceSize(Math::IntPoint(textureSurface->w, textureSurface->h));
texture.charSize = m_engine->WindowToInterfaceSize(Math::IntPoint(textSurface->w, textSurface->h));
}
SDL_FreeSurface(textSurface);
SDL_FreeSurface(textureSurface);
return texture;
}
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