void MFixedRenderer::drawText(MOText * textObj)
{
M_PROFILE_SCOPE(MFixedRenderer::drawText);
MFont * font = textObj->getFont();
const char * text = textObj->getText();
vector <float> * linesOffset = textObj->getLinesOffset();
if(! (strlen(text) > 0 && font))
return;
if(linesOffset->size() == 0)
return;
MRenderingContext * render = MEngine().getInstance()->getRenderingContext();
render->enableBlending();
render->enableTexture();
render->disableLighting();
render->setColor4(*textObj->getColor());
render->setBlendingMode(M_BLENDING_ALPHA);
static MVector2 vertices[4];
static MVector2 texCoords[4];
render->disableNormalArray();
render->disableColorArray();
render->enableVertexArray();
render->enableTexCoordArray();
render->setVertexPointer(M_FLOAT, 2, vertices);
render->setTexCoordPointer(M_FLOAT, 2, texCoords);
render->bindTexture(font->getTextureId());
unsigned int lineId = 0;
float lineOffset = (*linesOffset)[0];
float size = textObj->getSize();
float tabSize = size*2;
float fontSize = (float)font->getFontSize();
float widthFactor = font->getTextureWith() / fontSize;
float heightFactor = font->getTextureHeight() / fontSize;
float xc = 0, yc = 0;
unsigned int i;
unsigned int textLen = strlen(text);
for(i=0; i<textLen; i++)
{
if(text[i] == '\n') // return
{
if(((i+1) < textLen))
{
lineId++;
lineOffset = (*linesOffset)[lineId];
yc += size;
xc = 0;
}
continue;
}
if(text[i] == '\t') // tab
{
int tab = (int)(xc / tabSize) + 1;
xc = tab*tabSize;
continue;
}
// get character
unsigned int charCode = (unsigned int)((unsigned char)text[i]);
MCharacter * character = font->getCharacter(charCode);
if(! character)
continue;
MVector2 pos = character->getPos();
MVector2 scale = character->getScale();
MVector2 offset = character->getOffset() * size + MVector2(lineOffset, 0);
float width = scale.x * widthFactor * size;
float height = scale.y * heightFactor * size;
// construct quad
texCoords[0] = MVector2(pos.x, (pos.y + scale.y));
vertices[0] = MVector2(xc, (yc + height)) + offset;
texCoords[1] = MVector2((pos.x + scale.x), (pos.y + scale.y));
vertices[1] = MVector2((xc + width), (yc + height)) + offset;
texCoords[3] = MVector2((pos.x + scale.x), pos.y);
vertices[3] = MVector2((xc + width), yc) + offset;
texCoords[2] = MVector2(pos.x, pos.y);
vertices[2] = MVector2(xc, yc) + offset;
// draw quad
render->drawArray(M_PRIMITIVE_TRIANGLE_STRIP, 0, 4);
//move to next character
xc += character->getXAdvance() * size;
}
}
void MOText::updateLinesOffset(void)
{
MFont * font = getFont();
const char * text = m_text.getData();
float tabSize = m_size*2;
float fontSize = (float)font->getFontSize();
float widthFactor = font->getTextureWith() / fontSize;
float xc = 0;
float min = 0;
float max = 0;
// bounding box
MVector3 * boxMin = m_boundingBox.getMin();
MVector3 * boxMax = m_boundingBox.getMax();
// clear lines
m_linesOffset.clear();
unsigned int i;
unsigned int size = strlen(text);
for(i=0; i<size; i++)
{
if(text[i] == '\n') // return
{
switch(m_align)
{
case M_ALIGN_LEFT:
m_linesOffset.push_back(0);
break;
case M_ALIGN_RIGHT:
m_linesOffset.push_back(-(max - min));
break;
case M_ALIGN_CENTER:
m_linesOffset.push_back(-(max - min)*0.5f);
break;
}
min = 0;
max = 0;
xc = 0;
continue;
}
if(text[i] == '\t') // tab
{
int tab = (int)(xc / tabSize) + 1;
xc = tab*tabSize;
continue;
}
// get character
unsigned int charCode = (unsigned int)((unsigned char)text[i]);
MCharacter * character = font->getCharacter(charCode);
if(! character)
continue;
MVector2 scale = character->getScale();
MVector2 offset = character->getOffset() * m_size;
float width = scale.x * widthFactor * m_size;
float charMin = xc + offset.x;
float charMax = charMin + width;
if(charMin < min)
min = charMin;
if(charMax > max)
max = charMax;
//move to next character
xc += character->getXAdvance() * m_size;
// last char
if((i + 1) == size)
{
switch(m_align)
{
case M_ALIGN_LEFT:
m_linesOffset.push_back(0);
break;
case M_ALIGN_RIGHT:
m_linesOffset.push_back(-(max - min));
break;
case M_ALIGN_CENTER:
m_linesOffset.push_back(-(max - min)*0.5f);
break;
}
}
}
float globalOffset = boxMax->x - boxMin->x;
switch(m_align)
{
case M_ALIGN_RIGHT:
boxMin->x -= globalOffset;
boxMax->x -= globalOffset;
break;
case M_ALIGN_CENTER:
boxMin->x -= globalOffset*0.5f;
boxMax->x -= globalOffset*0.5f;
break;
}
}
bool M_loadFont(const char * filename, void * data, void * arg)
{
MFont * font = (MFont *)data;
int pen_x, pen_y, max_y;
unsigned int n, max_code = 4096;
unsigned int size = font->getFontSize();
unsigned int space = 2;
unsigned int width = 1024;
unsigned int height = 0;
MImage image;
FT_GlyphSlot slot;
FT_Library library;
FT_Face face;
FT_Byte * file_base;
FT_Long file_size;
// init
FT_Error error = FT_Init_FreeType(&library);
if(error){
printf("ERROR Load Font : unable to init FreeType\n");
return false;
}
// open file
MFile * file = M_fopen(filename, "rb");
if(! file)
{
FT_Done_FreeType(library);
printf("ERROR Load Font : can't read file %s\n", filename);
return false;
}
M_fseek(file, 0, SEEK_END);
file_size = M_ftell(file);
M_rewind(file);
file_base = new FT_Byte[file_size];
if(file_size != M_fread(file_base, sizeof(FT_Byte), file_size, file))
{
M_fclose(file);
FT_Done_FreeType(library);
delete [] file_base;
return false;
}
// read font
error = FT_New_Memory_Face(library, file_base, file_size, 0, &face);
M_fclose(file);
if(error)
{
printf("ERROR Load Font : unable to read data %s\n", filename);
FT_Done_FreeType(library);
delete [] file_base;
return false;
}
// set font size
error = FT_Set_Pixel_Sizes(face, 0, size);
if(error)
{
printf("ERROR Load Font : unable to size font\n");
FT_Done_FreeType(library);
delete [] file_base;
return false;
}
// parse characters
max_y = 0;
slot = face->glyph;
pen_x = space; pen_y = space;
for(n = 0; n<max_code; n++)
{
// load glyph image into the slot (erase previous one)
error = FT_Load_Char(face, n, FT_LOAD_RENDER | FT_LOAD_NO_HINTING);
if(error)
continue;
if(FT_Get_Char_Index(face, n) == 0)
continue;
// max y
max_y = MAX(max_y, slot->bitmap.rows);
if((pen_x + slot->bitmap.width + space) > width)
{
pen_x = space;
pen_y += max_y + space;
height += max_y + space;
max_y = 0;
}
// increment pen position
pen_x += slot->bitmap.width + space;
}
if(height == 0)
{
printf("ERROR Load Font : unable to create font texture\n");
FT_Done_FreeType(library);
delete [] file_base;
return false;
}
// create image
height = getNextPowerOfTwo(height);
image.create(M_UBYTE, width, height, 4);
memset(image.getData(), 0, image.getSize()*sizeof(char));
// init font
font->setTextureWidth(width);
font->setTextureHeight(height);
// create font texture
max_y = 0;
slot = face->glyph;
pen_x = space; pen_y = space;
for(n = 0; n<max_code; n++)
{
// load glyph image into the slot (erase previous one)
error = FT_Load_Char(face, n, FT_LOAD_RENDER | FT_LOAD_NO_HINTING);
if(error)
continue;
if(FT_Get_Char_Index(face, n) == 0)
continue;
// max y
max_y = MAX(max_y, slot->bitmap.rows);
if((pen_x + slot->bitmap.width + space) > (int)image.getWidth()){
pen_x = space;
pen_y += max_y + space;
}
// get character properties
float xAdvance = (slot->advance.x >> 6) / ((float)size);
MVector2 offset = MVector2((float)slot->bitmap_left - 1, - (float)slot->bitmap_top - 1) / ((float)size);
MVector2 pos = MVector2((float)(pen_x-1) / (float)width, (float)(pen_y-1) / (float)height);
MVector2 scale = MVector2((float)(slot->bitmap.width+2) / (float)width, (float)(slot->bitmap.rows+2) / (float)height);
// set character
font->setCharacter(n, MCharacter(xAdvance, offset, pos, scale));
// draw to image
drawBitmap(&image, &slot->bitmap, pen_x, pen_y);
// increment pen position
pen_x += slot->bitmap.width + space;
}
// send texture
MEngine * engine = MEngine().getInstance();
MRenderingContext * render = engine->getRenderingContext();
// gen texture id
unsigned int textureId = font->getTextureId();
if(textureId == 0)
{
render->createTexture(&textureId);
font->setTextureId(textureId);
}
// send texture image
render->bindTexture(textureId);
render->setTextureUWrapMode(M_WRAP_REPEAT);
render->setTextureVWrapMode(M_WRAP_REPEAT);
render->sendTextureImage(&image, 0, 1, 0);
// finish
FT_Done_FreeType(library);
delete [] file_base;
return true;
}
void MOText::prepare(void)
{
MFont * font = getFont();
const char * text = m_text.getData();
if(! (strlen(text) > 0 && font)){
m_boundingBox = MBox3d();
return;
}
MVector3 * min = m_boundingBox.getMin();
MVector3 * max = m_boundingBox.getMax();
(*min) = (*max) = MVector3(0, 0, 0);
float tabSize = m_size*2;
float fontSize = (float)font->getFontSize();
float widthFactor = font->getTextureWith() / fontSize;
float heightFactor = font->getTextureHeight() / fontSize;
float xc = 0, yc = 0;
unsigned int i;
unsigned int size = strlen(text);
for(i=0; i<size; i++)
{
if(text[i] == '\n') // return
{
yc += m_size;
xc = 0;
continue;
}
if(text[i] == '\t') // tab
{
int tab = (int)(xc / tabSize) + 1;
xc = tab*tabSize;
continue;
}
// get character
unsigned int charCode = (unsigned int)((unsigned char)text[i]);
MCharacter * character = font->getCharacter(charCode);
if(! character)
continue;
MVector2 scale = character->getScale();
MVector2 offset = character->getOffset() * m_size;
float width = scale.x * widthFactor * m_size;
float height = scale.y * heightFactor * m_size;
MVector2 charMin = MVector2(xc, yc) + offset;
MVector2 charMax = charMin + MVector2(width, height);
if(charMin.x < min->x)
min->x = charMin.x;
if(charMin.y < min->y)
min->y = charMin.y;
if(charMax.x > max->x)
max->x = charMax.x;
if(charMax.y > max->y)
max->y = charMax.y;
//move to next character
xc += character->getXAdvance() * m_size;
}
updateLinesOffset();
}