C++ SDL display texture

[noaboa]

Hi, I just started learning SDL. Im reading the book SDL Game Development and I have an error in my code. I don't know if I can ask about SDL here, but I think it has much to do with C++. Heres the relevant code.

	SDL_Surface* pTempSurface = SDL_LoadBMP("assets/rider.bmp");

	m_pTexture = SDL_CreateTextureFromSurface(m_pRenderer,
		pTempSurface);

	SDL_FreeSurface(pTempSurface);

	SDL_QueryTexture(m_pTexture, NULL, NULL,
		&m_sourceRectangle.w, &m_sourceRectangle.h);

	m_destinationRectangle.x = m_sourceRectangle.x = 0;
	m_destinationRectangle.y = m_sourceRectangle.y = 0;
	m_destinationRectangle.w = m_sourceRectangle.w;
	m_destinationRectangle.h = m_sourceRectangle.h;
}

void Game::render()
{
	SDL_RenderClear(m_pRenderer); // clear the renderer to the draw color

	SDL_RenderCopy(m_pRenderer, m_pTexture, &m_sourceRectangle,
		&m_destinationRectangle);

	SDL_RenderPresent(m_pRenderer); // draw to the screen
}

can someone help me find out whats wrong?

[Peter87]

What error message do you get? The code that you have posted is not a complete program.

[noaboa]

I don't get any error messages, but the screen ends up black. Sorry forgot to add it

[Peter87]

Are you sure the surface/texture loads correctly? If SDL_LoadBMP or SDL_CreateTextureFromSurface fails they return NULL.

[noaboa]

I just tested it and I didnt get any errors. I've checked the file I load it from and it is correct. Mayby the wrong thing is in the main.cpp here is it:

#include "Game.hpp"

Game* g_game = 0;

int main(int argc, char* argv[])
{

	g_game = new Game();

	g_game->init("Chapter 1", 100, 100, 640, 480, false);

	while (g_game->running())
	{
		g_game->handleEvents();
		g_game->update();
		g_game->render();
	}
	g_game->clean();

	return 0;
}