Example with SDL_ttf 3.1.1 does not show a text with SDL3.dll 3.2.4

[8Observer8]

I have built the current SDL3_ttf 3.1.1 with SDL 3.2.4 and FreeType 2.13.3 using VS 2022 but my example does not show a text. But when I replace SDL3.dll 3.2.4 with SDL3.dll 3.1.10 a text is shown.

[slouken]

Can you provide a link to your example and the fonts you used?

[8Observer8]

My steps: Setting up SDL3_ttf 3.1.1

I have copied arial.ttf from the C:\Windows\Fonts folder:

Example:

#define SDL_MAIN_USE_CALLBACKS 1 // Use the callbacks instead of main()
#include <SDL3/SDL.h>
#include <SDL3/SDL_main.h>
#include <SDL3_ttf/SDL_ttf.h>

// We will use this renderer to draw into this window every frame
static SDL_Window* window = NULL;
static SDL_Renderer* renderer = NULL;
static SDL_Texture* texture = NULL;

// This function runs once at startup
SDL_AppResult SDL_AppInit(void** appstate, int argc, char* argv[])
{
    if (!SDL_Init(SDL_INIT_VIDEO)) {
        SDL_Log("Couldn't initialize SDL: %s", SDL_GetError());
        return SDL_APP_FAILURE;
    }

    // Initialize the TTF library
    if (!TTF_Init()) {
        SDL_Log("Couldn't initialize TTF: %s", SDL_GetError());
        return SDL_APP_FAILURE;
    }

    if (!SDL_CreateWindowAndRenderer("English text using SDL3 and C",
        500, 500, 0, &window, &renderer)) //
    {
        SDL_Log("Couldn't create window/renderer: %s", SDL_GetError());
        return SDL_APP_FAILURE;
    }

    TTF_Font* font = TTF_OpenFont("assets/fonts/arial.ttf", 48);
    SDL_Color textColor(255, 255, 255);
    SDL_Surface* surface = TTF_RenderText_Blended(font, "Hello, World!", 13, textColor);
    texture = SDL_CreateTextureFromSurface(renderer, surface);
    SDL_DestroySurface(surface);

    return SDL_APP_CONTINUE; // Carry on with the program
}

// This function runs when a new event (mouse input, keypresses, etc) occurs
SDL_AppResult SDL_AppEvent(void* appstate, SDL_Event* event)
{
    if (event->type == SDL_EVENT_QUIT) {
        return SDL_APP_SUCCESS; // End the program, reporting success to the OS
    }
    return SDL_APP_CONTINUE; // Carry on with the program
}

// This function runs once per frame, and is the heart of the program
SDL_AppResult SDL_AppIterate(void* appstate)
{
    // Set the position where you want to draw the text
    float x = 10.f;
    float y = 10.f;

    // Create a rectangle to hold the texture dimensions
    SDL_FRect rect;
    SDL_GetTextureSize(texture, &rect.w, &rect.h);
    rect.x = x;
    rect.y = y;

    // SDL_RenderTexture(renderer, texture, NULL, NULL);
    // Clear the screen
    SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
    SDL_RenderClear(renderer);

    // Draw the text
    SDL_RenderTexture(renderer, texture, NULL, &rect);

    // Update the screen
    SDL_RenderPresent(renderer);
    return SDL_APP_CONTINUE;  /* carry on with the program! */
}

// This function runs once at shutdown
void SDL_AppQuit(void* appstate, SDL_AppResult result)
{
    // SDL will clean up the window/renderer for us
    TTF_Quit();
    SDL_Quit();
}

CMakeLists.txt

find_package(SDL3)
find_package(SDL3_ttf)
target_link_libraries(hello-sdl3-ttf PRIVATE SDL3_ttf::SDL3_ttf SDL3::SDL3)

# Copy the assets folder to the dist folder
add_custom_command(TARGET hello-sdl3-ttf POST_BUILD
    COMMAND ${CMAKE_COMMAND} -E copy_directory
    ${CMAKE_SOURCE_DIR}/assets $<TARGET_FILE_DIR:hello-sdl3-ttf>/assets)

[slouken]

Can you double check you were able to open your font? I don't see any error checking there.

I changed your example to this:

TTF_Font *font = TTF_OpenFont("C:/Windows/Fonts/arial.ttf", 48);

and ran it using the latest SDL_ttf and SDL code from GitHub and it works here.

[8Observer8]

I will try to build SDL_ttf with MinGW and Emscripten and will write about the result later.

[8Observer8]

It works for me:

TTF_Font *font = TTF_OpenFont("C:/Windows/Fonts/arial.ttf", 48);

Sorry and thank you very much!

[slouken]

You’re welcome!

[8Observer8]

@slouken hello! Could you try to reproduce the following steps on the video?

text-sdl3-ttf-exe.zip

sdl-does-not-show-text.mp4

SDL 3.2.6 was downloaded from Releases. It is VS version.
I use 3.1.10 because this path in my PATH: E:\libs\sdl-3.1.10-msvc\win\debug\bin

[madebr]

Does this also happen with latest SDL3_TTF 3.2.0?
Its minimum required SDL3 version is 3.2.6.

The minimum required SDL3 version is not tested at runtime. Maybe we should?

[8Observer8]

The same for SDL3_ttf.dll 3.2.0 and SDL.dll 3.2.8

[8Observer8]

Source: text-sdl3-ttf.zip

[slouken]

You don't check the return value of TTF_OpenFont(), are you sure the font is being loaded correctly?

[slouken]

On my system both of the DLLs you provide work.

[slouken]

If you modify the project to use a vendored copy of SDL, you can easily git bisect to see what commit in SDL broke this:

# set the output directory for built objects.
# This makes sure that the dynamic library goes into the build directory automatically.
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/$<CONFIGURATION>")
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/$<CONFIGURATION>")

# This assumes the SDL source is available in vendored/SDL
add_subdirectory(vendored/SDL EXCLUDE_FROM_ALL)

# This assumes the SDL_ttf source is available in vendored/SDL_ttf
add_subdirectory(vendored/SDL_ttf EXCLUDE_FROM_ALL)

#find_package(SDL3)
#find_package(SDL3_ttf)
target_link_libraries(app PRIVATE SDL3_ttf::SDL3_ttf SDL3::SDL3)

git clone https://github.com/libsdl.org/SDL vendored/SDL
git clone https://github.com/libsdl.org/SDL_ttf vendored/SDL_ttf
cd SDL_ttf
git submodule update --init --recursive
cd ../SDL
git bisect start