float CglFont::GetTextWidth_(const std::u8string& text)
{
if (text.empty()) return 0.0f;
float w = 0.0f;
float maxw = 0.0f;
const GlyphInfo* prv_g=NULL;
const GlyphInfo* cur_g;
int pos = 0;
while (pos < text.length()) {
const char32_t u = Utf8GetNextChar(text, pos);
switch (u) {
// inlined colorcode
case ColorCodeIndicator:
pos = SkipColorCodes(text, pos - 1);
if (pos<0) {
pos = text.length();
}
break;
// reset color
case ColorResetIndicator:
break;
// newline
case 0x0d: // CR+LF
if (pos < text.length() && text[pos] == 0x0a)
pos++;
case 0x0a: // LF
if (prv_g)
w += prv_g->advance;
if (w > maxw)
maxw = w;
w = 0.0f;
prv_g = NULL;
break;
// printable char
default:
cur_g = &GetGlyph(u);
if (prv_g) w += GetKerning(*prv_g, *cur_g);
prv_g = cur_g;
}
}
if (prv_g)
w += prv_g->advance;
if (w > maxw)
maxw = w;
return maxw;
}
void CglFont::RenderStringOutlined(float x, float y, const float& scaleX, const float& scaleY, const std::string& str)
{
const float shiftX = (scaleX/fontSize) * GetOutlineWidth(), shiftY = (scaleY/fontSize) * GetOutlineWidth();
const float startx = x;
const float lineHeight_ = scaleY * GetLineHeight();
const std::u8string& ustr = toustring(str);
const size_t length = str.length();
va.EnlargeArrays(length * 4, 0, VA_SIZE_2DT);
va2.EnlargeArrays(length * 4, 0, VA_SIZE_2DT);
int skippedLines;
bool colorChanged;
const GlyphInfo* g = NULL;
float4 newColor = textColor;
char32_t c;
int i = 0;
do {
const bool endOfString = SkipColorCodesAndNewLines(ustr, &i, &newColor, &colorChanged, &skippedLines, &baseTextColor);
if (endOfString)
return;
c = Utf8GetNextChar(str,i);
if (colorChanged) {
if (autoOutlineColor) {
SetColors(&newColor,NULL);
} else {
SetTextColor(&newColor);
}
}
const GlyphInfo* c_g = &GetGlyph(c);
if (skippedLines>0) {
x = startx;
y -= skippedLines * lineHeight_;
} else if (g) {
x += scaleX * GetKerning(*g, *c_g);
}
g = c_g;
const auto& tc = g->texCord;
const auto& stc = g->shadowTexCord;
const float dx0 = (scaleX * g->size.x0()) + x, dy0 = (scaleY * g->size.y0()) + y;
const float dx1 = (scaleX * g->size.x1()) + x, dy1 = (scaleY * g->size.y1()) + y;
// draw outline
va2.AddVertexQ2dT(dx0-shiftX, dy1-shiftY, stc.x0(), stc.y1());
va2.AddVertexQ2dT(dx0-shiftX, dy0+shiftY, stc.x0(), stc.y0());
va2.AddVertexQ2dT(dx1+shiftX, dy0+shiftY, stc.x1(), stc.y0());
va2.AddVertexQ2dT(dx1+shiftX, dy1-shiftY, stc.x1(), stc.y1());
// draw the actual character
va.AddVertexQ2dT(dx0, dy1, tc.x0(), tc.y1());
va.AddVertexQ2dT(dx0, dy0, tc.x0(), tc.y0());
va.AddVertexQ2dT(dx1, dy0, tc.x1(), tc.y0());
va.AddVertexQ2dT(dx1, dy1, tc.x1(), tc.y1());
} while(true);
}
void CglFont::RenderString(float x, float y, const float& scaleX, const float& scaleY, const std::string& str)
{
/**
* NOTE:
* Font rendering does not use display lists, but VAs. It's actually faster
* (450% faster with a 7600GT!) for these reasons:
*
* 1. When using DLs, we can not group multiple glyphs into one glBegin/End pair
* because glTranslatef can not go between such a pair.
* 2. We can now eliminate all glPushMatrix/PopMatrix pairs related to font rendering
* because the transformations are calculated on the fly. These are just a couple of
* floating point multiplications and shouldn't be too expensive.
*/
const float startx = x;
const float lineHeight_ = scaleY * GetLineHeight();
unsigned int length = (unsigned int)str.length();
const std::u8string& ustr = toustring(str);
va.EnlargeArrays(length * 4, 0, VA_SIZE_2DT);
int skippedLines;
bool colorChanged;
const GlyphInfo* g = NULL;
float4 newColor = textColor;
char32_t c;
int i = 0;
do {
const bool endOfString = SkipColorCodesAndNewLines(ustr, &i, &newColor, &colorChanged, &skippedLines, &baseTextColor);
if (endOfString)
return;
c = Utf8GetNextChar(str,i);
if (colorChanged) {
if (autoOutlineColor) {
SetColors(&newColor,NULL);
} else {
SetTextColor(&newColor);
}
}
const GlyphInfo* c_g = &GetGlyph(c);
if (skippedLines>0) {
x = startx;
y -= skippedLines * lineHeight_;
} else if (g) {
x += scaleX * GetKerning(*g, *c_g);
}
g = c_g;
const auto& tc = g->texCord;
const float dx0 = (scaleX * g->size.x0()) + x, dy0 = (scaleY * g->size.y0()) + y;
const float dx1 = (scaleX * g->size.x1()) + x, dy1 = (scaleY * g->size.y1()) + y;
va.AddVertexQ2dT(dx0, dy1, tc.x0(), tc.y1());
va.AddVertexQ2dT(dx0, dy0, tc.x0(), tc.y0());
va.AddVertexQ2dT(dx1, dy0, tc.x1(), tc.y0());
va.AddVertexQ2dT(dx1, dy1, tc.x1(), tc.y1());
} while(true);
}
float CFont::AddStr(CStrAny &sStr, const CVector<2> &vPos, char chPrevious)
{
ASSERT(IsValid());
if (!sStr.Length())
return 0;
UINT uiVerts, uiInds, uiVertSize;
uiVerts = sStr.Length() * 4;
uiInds = sStr.Length() * 6;
CGeometry *pGeom = m_pTextModel->m_pGeometry;
uiVertSize = pGeom->m_pInputDesc->GetSize();
ASSERT(uiVertSize == sizeof(TPlainVertex));
if (pGeom->m_pVB->GetSize(0) < (pGeom->m_uiVertices + uiVerts) * uiVertSize)
return INVALID_LENGTH;
if (pGeom->m_pIB->GetSize(0) < (pGeom->m_uiIndices + uiInds) * sizeof(uint16_t))
return INVALID_LENGTH;
TPlainVertex *pVerts;
uint16_t *pInds;
pVerts = (TPlainVertex *) pGeom->m_pVB->Map(0, CResource::RMF_SYSTEM_ONLY, pGeom->m_uiVertices * uiVertSize, uiVerts * uiVertSize);
ASSERT(pVerts);
pInds = (uint16_t *) pGeom->m_pIB->Map(0, CResource::RMF_SYSTEM_ONLY, pGeom->m_uiIndices * sizeof(uint16_t), uiInds * sizeof(uint16_t));
ASSERT(pInds);
CVector<3> vCur = { vPos.x(), vPos.y() - m_iAscent, 0.5f }, vBoxSize = { 0, (float) m_iHeight, 0 };
int i, iChars = 0;
for (i = 0; i < sStr.Length(); i++) {
char ch = sStr[i];
if (!m_Chars[(uint8_t) ch].ch)
continue;
CRect<> rcInTex = GetCharRect(ch);
vBoxSize.x() = (float) m_Chars[(uint8_t) ch].iB;
vCur.x() += m_Chars[(uint8_t) ch].iA + GetKerning(chPrevious, ch);
pVerts[0].vPos.Set(vCur.x(), vCur.y() + vBoxSize.y(), vCur.z());
pVerts[0].vTex = rcInTex.m_vMin;
pVerts[1].vPos = vCur;
pVerts[1].vTex = rcInTex.GetPoint(0, 1);
pVerts[2].vPos = vCur + vBoxSize;
pVerts[2].vTex = rcInTex.GetPoint(1, 0);
pVerts[3].vPos.Set(vCur.x() + vBoxSize.x(), vCur.y(), vCur.z());
pVerts[3].vTex = rcInTex.m_vMax;
pInds[0] = pGeom->m_uiVertices + iChars * 4;
pInds[1] = pInds[0] + 1;
pInds[2] = pInds[0] + 2;
pInds[3] = pInds[0] + 2;
pInds[4] = pInds[0] + 1;
pInds[5] = pInds[0] + 3;
vCur.x() += m_Chars[(uint8_t) ch].iB + m_Chars[(uint8_t) ch].iC;
chPrevious = ch;
pVerts += 4;
pInds += 6;
iChars++;
}
pGeom->m_pIB->Unmap();
pGeom->m_pVB->Unmap();
pGeom->m_uiVertices += iChars * 4;
pGeom->m_uiIndices += iChars * 6;
return vCur.x() - vPos.x();
}
CBSurface *CBFontTT::RenderTextToTexture(const WideString &text, int width, TTextAlign align, int maxHeight, int &textOffset) {
TextLineList lines;
WrapText(text, width, maxHeight, lines);
TextLineList::iterator it;
int textHeight = lines.size() * (m_MaxCharHeight + m_Ascender);
SDL_Surface *surface = SDL_CreateRGBSurface(0, width, textHeight, 32, 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000);
SDL_LockSurface(surface);
int posY = (int)GetLineHeight() - (int)m_Descender;
for (it = lines.begin(); it != lines.end(); ++it) {
TextLine *line = (*it);
int posX = 0;
switch (align) {
case TAL_CENTER:
posX += (width - line->GetWidth()) / 2;
break;
case TAL_RIGHT:
posX += width - line->GetWidth();
break;
}
textOffset = 0;
for (size_t i = 0; i < line->GetText().length(); i++) {
wchar_t ch = line->GetText()[i];
GlyphInfo *glyph = m_GlyphCache->GetGlyph(ch);
if (!glyph) continue;
textOffset = std::max(textOffset, glyph->GetBearingY());
}
int origPosX = posX;
wchar_t prevChar = L'\0';
for (size_t i = 0; i < line->GetText().length(); i++) {
wchar_t ch = line->GetText()[i];
GlyphInfo *glyph = m_GlyphCache->GetGlyph(ch);
if (!glyph) continue;
float kerning = 0;
if (prevChar != L'\0') kerning = GetKerning(prevChar, ch);
posX += (int)kerning;
if (glyph->GetBearingY() > 0) {
int i = 10;
}
SDL_Rect rect;
rect.x = posX + glyph->GetBearingX();
rect.y = posY - glyph->GetBearingY() + textOffset;
rect.w = glyph->GetImage()->w;
rect.h = glyph->GetImage()->h;
BlitSurface(glyph->GetImage(), surface, &rect);
prevChar = ch;
posX += (int)(glyph->GetAdvanceX());
posY += (int)(glyph->GetAdvanceY());
}
if (m_IsUnderline) {
for (int i = origPosX; i < origPosX + line->GetWidth(); i++) {
Uint8 *buf = (Uint8 *)surface->pixels + (int)(m_UnderlinePos + m_Ascender) * surface->pitch;
Uint32 *buf32 = (Uint32 *)buf;
buf32[i] = SDL_MapRGBA(surface->format, 255, 255, 255, 255);
}
}
SDL_UnlockSurface(surface);
delete line;
line = NULL;
posY += GetLineHeight();
}
CBSurfaceSDL *wmeSurface = new CBSurfaceSDL(Game);
if (SUCCEEDED(wmeSurface->CreateFromSDLSurface(surface))) {
SDL_FreeSurface(surface);
return wmeSurface;
} else {
SDL_FreeSurface(surface);
delete wmeSurface;
return NULL;
}
}
// Generates the geometry required to render a single line of text.
int FontFaceHandle::GenerateString(GeometryList& geometry, const WString& string, const Vector2f& position, const Colourb& colour, int layer_configuration_index, word default_character) const
{
int geometry_index = 0;
int line_width = 0;
ROCKET_ASSERT(layer_configuration_index >= 0);
ROCKET_ASSERT(layer_configuration_index < (int) layer_configurations.size());
// Fetch the requested configuration and generate the geometry for each one.
const LayerConfiguration& layer_configuration = layer_configurations[layer_configuration_index];
for (size_t i = 0; i < layer_configuration.size(); ++i)
{
FontFaceLayer* layer = layer_configuration[i];
Colourb layer_colour;
if (layer == base_layer)
layer_colour = colour;
else
layer_colour = layer->GetColour();
// Resize the geometry list if required.
if ((int) geometry.size() < geometry_index + layer->GetNumTextures())
geometry.resize(geometry_index + layer->GetNumTextures());
// Bind the textures to the geometries.
for (int i = 0; i < layer->GetNumTextures(); ++i)
geometry[geometry_index + i].SetTexture(layer->GetTexture(i));
line_width = 0;
word prior_character = 0;
const word* string_iterator = string.CString();
const word* string_end = string.CString() + string.Length();
word final_character;
for (; string_iterator != string_end; string_iterator++)
{
final_character = *string_iterator;
FontGlyphMap::const_iterator iterator = glyphs.find(*string_iterator);
if (iterator == glyphs.end())
{
if (default_character >= 32)
{
iterator = glyphs.find(default_character);
if (iterator == glyphs.end())
{
continue;
}
else
{
final_character = default_character;
}
}
else
{
continue;
}
}
// Adjust the cursor for the kerning between this character and the previous one.
if (prior_character != 0)
line_width += GetKerning(prior_character, final_character);
layer->GenerateGeometry(&geometry[geometry_index], final_character, Vector2f(position.x + line_width, position.y), layer_colour);
line_width += iterator->second.advance;
prior_character = final_character;
}
geometry_index += layer->GetNumTextures();
}
// Cull any excess geometry from a previous generation.
geometry.resize(geometry_index);
return line_width;
}
CTextWrap::word CTextWrap::SplitWord(CTextWrap::word& w, float wantedWidth, bool smart)
{
// returns two pieces 'L'eft and 'R'ight of the split word (returns L, *wi becomes R)
word w2;
w2.pos = w.pos;
const float spaceAdvance = GetGlyph(spaceUTF16).advance;
if (w.isLineBreak) {
// shouldn't happen
w2 = w;
w.isSpace = true;
} else if (w.isSpace) {
const int split = (int)std::floor(wantedWidth / spaceAdvance);
w2.isSpace = true;
w2.numSpaces = split;
w2.width = spaceAdvance * w2.numSpaces;
w.numSpaces -= split;
w.width = spaceAdvance * w.numSpaces;
w.pos += split;
} else {
if (smart) {
if (
(wantedWidth < 8 * spaceAdvance) ||
(w.text.length() < 1)
) {
w2.isSpace = true;
return w2;
}
}
float width = 0.0f;
int i = 0;
float min_penalty = 1e9;
unsigned int goodbreak = 0;
char32_t c = Utf8GetNextChar(w.text,i);
const GlyphInfo* curGlyph = &GetGlyph(c);
const GlyphInfo* nextGlyph = curGlyph;
do {
const int lastCharPos = i;
const char32_t co = c;
curGlyph = nextGlyph;
c = Utf8GetNextChar(w.text,i);
nextGlyph = &GetGlyph(c);
width += GetKerning(*curGlyph, *nextGlyph);
if (width > wantedWidth) {
break;
}
if (smart) {
const float penalty = GetPenalty(co, lastCharPos, w.text.length());
if (penalty < min_penalty) {
min_penalty = penalty;
goodbreak = lastCharPos;
}
} else {
goodbreak = i;
}
} while(i < w.text.length());
w2.text = toustring(w.text.substr(0,goodbreak));
w2.width = GetTextWidth(w2.text);
w.text.erase(0,goodbreak);
w.width = GetTextWidth(w.text);
w.pos += goodbreak;
}
return w2;
}
