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im currently facing an strange error with rendering text using SDL_TTF and OpenGL.

The thing is that when i use TTF_RenderText_Blended , all texts are displayed good and without any problems

Rendering text with TTF_RenderText_Blended

But when i want switch to TTF_RenderText_Solid "buggy" black rectangles are displayed and i dont know specify if its problem with SDL_TTF or in OpenGL when creating the right texture from surface TTF_RenderText_Solid

Function to load surface from textInfo(font,size)

void TextSprite::loadSprite(const std::string& text, textInfo* info){
SDL_Surface* tmpSurface = nullptr;tmpSurface = TTF_RenderText_Solid(info->font,text.c_str(), *_color);
if (tmpSurface==nullptr){
    ErrorManager::systemError("Cannot make a text texture");
}
createTexture(tmpSurface);

}

Function to create an OpenGL texture from SDL_Surface

void TextSprite::createTexture(SDL_Surface* surface){
glGenTextures(1,&_textureID);
glBindTexture(GL_TEXTURE_2D,_textureID);int Mode = GL_RGB;
if (surface->format->BytesPerPixel==4){
    Mode = GL_RGBA;
}
glTexImage2D(GL_TEXTURE_2D,0,Mode,surface->w,surface->h,0,Mode,GL_UNSIGNED_BYTE,surface->pixels);//Wrapping
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_REPEAT);//Filtering
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR_MIPMAP_NEAREST);glBindTexture(GL_TEXTURE_2D,0);
_rect.w = surface->w;
_rect.h = surface->h;SDL_FreeSurface(surface);

}

Thanks for help.

Question author Pins | Source

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TTF_RenderText_Solid() outputs 8-bit palettized surfaces, not the 32-bit ARGB surfaces that TextSprite::createTexture() operates on.

Answer author Genpfault

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