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Graphics / SegFault in Texture.cpp (Intel Graphics)

« on: May 30, 2022, 10:57:28 pm »

Hi, all! I just started to learn SFML and I got a SegFault when trying to run this little mandelbrot sample program.
It runs well on my friend's PC (nVidia graphics) but not on my laptop (Intel graphics).

My specs:

• Windows 7 x64 SP1
• Intel (GMA) 4500MHD adapter with the latest available driver (8.15.10.2869), OpenGL 2.1 and GL_EXT_framebuffer_object support (reported by OpenGL Extensions Viewer)
• Code::Blocks 20.03 with MinGW-64-GCC-8.10
• SFML (Dev snapshot, windows-gcc-810-mingw-64.zip, 2022-Jan-07)

Stack trace:

main.cpp:

// Line 43
mandelTexture = mandelbrot(width, height, oxmin, oxmax, oymin, oymax, 100);

mandelbrot func works ok and returns its value and we go to the operator= of the Texture class:
Texture.cpp:

// Line 816
Texture& Texture::operator =(const Texture& right)
// Line 818
    Texture temp(right);

then to the copy constructor:
Texture.cpp:

// Line 83
Texture::Texture(const Texture& copy) :
// Line 99
            update(copy);

then to the update func:
Texture.cpp:

// Line 439
void Texture::update(const Texture& texture)
// Line 441
    // Update the whole texture
// Line 442
    update(texture, {0, 0});

and another update:
Texture.cpp:

// Line 447
void Texture::update(const Texture& texture, const Vector2u& dest)
// Line 455
#ifndef SFML_OPENGL_ES
// Line 487
        // Link the destination texture to the destination frame buffer
// Line 488
        glCheck(GLEXT_glBindFramebuffer(GLEXT_GL_DRAW_FRAMEBUFFER, destFrameBuffer));
// Line 489
        glCheck(GLEXT_glFramebufferTexture2D(GLEXT_GL_DRAW_FRAMEBUFFER, GLEXT_GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_texture, 0));

and I got a SegFault at line 489