Hi!
Initially this bug was found under windows in my C# project used shared libs via wrapper SDL2-CS
SDL 2.0.8
SDL_ttf 2.0.15 / 2.0.14
After bug localization i could confirm it under linux in pure c.
Bug description:
If you use TTF_OpenFontIndexRW or TTF_OpenFontRW for creating TTF_Font with same SDL_RWops (for creating SDL_RWops I used SDL_RWFromFile, SDL_RWFromMem, SDL_RWFromConstMem) and you render text using TTF_RenderUTF8_Blended:
- first
TTF_Fontfont_2with russian symbolй - second
TTF_Fontfont_6with any text: text will be blank(i setTTF_STYLE_UNDERLINEto second one to indicate that it was being rendered)
You got this:
If you don’t use russian symbol й in first render, you will get this:
will try add screenshot as comment
Finaly, if you use TTF_OpenFontIndex / TTF_OpenFont instead of TTF_OpenFontIndexRW / TTF_OpenFontRW, rendering works as it should:
will try add screenshot as comment
Hope you can help me, because using TTF_OpenFontIndex instead of TTF_OpenFontIndexRW is very expensive.
bug.c
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_ttf.h>
int RenderText(SDL_Renderer *renderer, TTF_Font *font, char *text_line, int y, int style)
{
SDL_Color textColor = {0x00, 0x00, 0x00, 0};
TTF_SetFontStyle(font, style);
SDL_Surface *textSurface = TTF_RenderUTF8_Blended(font, text_line, textColor);
SDL_Texture *texture_text = SDL_CreateTextureFromSurface(renderer, textSurface);
SDL_Rect dst_rect = {
.y = y,
.x = 0,
.h = textSurface->h,
.w = textSurface->w,
};
SDL_RenderCopy(renderer, texture_text, NULL, &dst_rect);
SDL_DestroyTexture(texture_text);
SDL_FreeSurface(textSurface);
return dst_rect.h;
}
void bug(SDL_Renderer *renderer)
{
int ptsize = 16;
char *filename = "PT Serif_Italic.ttf";
SDL_RWops *RWops = SDL_RWFromFile(filename, "rb");
if (RWops == NULL)
fprintf(stderr, "SDL_RWFromFile failed: %s\n", SDL_GetError());
int y = 0;
TTF_Font *font_2 = TTF_OpenFontIndexRW(RWops, 0, ptsize, 0);
//TTF_Font *font_2 = TTF_OpenFontIndex(filename, ptsize, 0);
if (font_2 == NULL)
fprintf(stderr, "font_2 failed: %s\n", SDL_GetError());
char *bug_str_char = "й";
//char *bug_str_char = "Hello Привет";
y += RenderText(renderer, font_2, bug_str_char, y, 2);
TTF_Font *font_6 = TTF_OpenFontIndexRW(RWops, 0, ptsize, 0);
//TTF_Font *font_6 = TTF_OpenFontIndex(filename, ptsize, 0);
if (font_6 == NULL)
fprintf(stderr, "font_6 failed: %s\n", SDL_GetError());
y += RenderText(renderer, font_6, "Hello Привет", y, 6);
}
int main(int argc, char *argv[])
{
SDL_Window *window;
SDL_Renderer *renderer;
SDL_Event event;
SDL_Init(SDL_INIT_EVERYTHING);
TTF_Init();
if (SDL_CreateWindowAndRenderer(640, 480, 0, &window, &renderer) < 0)
fprintf(stderr, "SDL_CreateWindowAndRenderer() failed: %s\n", SDL_GetError());
int done = 0;
while (!done)
{
if (SDL_WaitEvent(&event) < 0)
{
fprintf(stderr, "SDL_PullEvent() error: %s\n", SDL_GetError());
done = 1;
continue;
}
done = event.type == SDL_QUIT ? 1 : 0;
SDL_SetRenderDrawColor(renderer, 0xFF, 0xFF, 0xFF, 0xFF);
SDL_RenderClear(renderer);
bug(renderer);
SDL_RenderPresent(renderer);
SDL_Delay(50);
}
TTF_Quit();
SDL_Quit();
}
bug.c + PT Serif_Italic.ttf + Makefile: PT_Serif_Italic_Bug.zip
