C++

Forum

 
LoadBMP SDL Issue - Help!

ahackit (4)
Trying to Load a BMP Image in SDL and running into an issue. The black screen loads and everything seems to be running correctly. However, I put debug code to show that the image is loading correctly, but I keep returning very strange values for the Width and Height? Can anyone help me with this? Here is an image of the output http://imgur.com/DfeRXI8 Nothing is drawn to the black screen as well.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
 
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_pSourceRect.w, &m_pSourceRect.h);
	//DEBUGXX
	std::cout << m_pSourceRect.w<<std::endl;
	std::cout <<m_pSourceRect.h<<std::endl;
	std::cout << m_pSourceRect.x<<std::endl;
	std::cout <<m_pSourceRect.y<<std::endl;

	m_pDestinationRect.x = m_pSourceRect.x = 0;
	m_pDestinationRect.y = m_pSourceRect.y = 0;
	m_pDestinationRect.w = m_pSourceRect.w;
	m_pDestinationRect.h = m_pSourceRect.h;

	std::cout << m_pDestinationRect.w<<std::endl;
	std::cout <<m_pDestinationRect.h<<std::endl;
	std::cout << m_pDestinationRect.x<<std::endl;
	std::cout <<m_pDestinationRect.y<<std::endl;

	int flags = 0;	
	if(fullScreen)
	{
		flags = SDL_WINDOW_FULLSCREEN;
	}
	if(SDL_Init(SDL_INIT_EVERYTHING) ==0)
	{
		std::cout << "SDL Init Success\n";
		m_pWindow = SDL_CreateWindow(title,xpos,ypos,width,height,flags);
		if(m_pWindow != 0)
		{
			std::cout << "Window creation success!\n";
			m_pRenderer = SDL_CreateRenderer(m_pWindow, -1, 0);

			if(m_pRenderer !=0)
			{
				std::cout <<  "renderer creation success\n";
				SDL_SetRenderDrawColor(m_pRenderer,0,0,0,255);

			}
			else
			{
				std::cout << "Renderer creation failed\n";
				return false;
			}
		}
		else
		{
			std::cout<< "SDL init fail\n";
			return false;
		}

	}
	else
	{
	std::cout << "SDL Init Fail\n";
	return false;
	}
	std::cout << "Init Success\n";
	m_bRunning = true;
	
	return true;
}
ahackit (4)
Narrowed down the issue to so:

1
2
3
4
5
6
7
8
9
 
	SDL_Surface* pTempSurface = SDL_LoadBMP("assets/test.bmp");
	m_pTexture = SDL_CreateTextureFromSurface(m_pRenderer,pTempSurface);
	SDL_FreeSurface(pTempSurface);
	SDL_QueryTexture(m_pTexture, NULL,NULL,&m_pSourceRect.w, &m_pSourceRect.h);

	m_pDestinationRect.x = m_pSourceRect.x = 0;
	m_pDestinationRect.y = m_pSourceRect.y = 0;
	m_pDestinationRect.w = m_pSourceRect.w;
	m_pDestinationRect.h = m_pSourceRect.h;


No idea why its not pulling in the right values when I run SDL_QueryTexture
Disch (13742)
You can't do any graphic operations before you initialize the graphics.

You are attempting to load a texture on line 2... yet you don't initialize the graphics until line 26.
ahackit (4)
You are my hero, and I feel like an idiot.


Thanks so much!!!
UrbanNinja (10)
Hey there!

I am not trying to be "that guy" but I just want to suggest that if your problem is solved, you should mark it with the button at the top of the post.
Thank you :)
Last edited on
ahackit (4)
Thanks for being that guy! New to the forum and will mark any problems solved going forward. Thanks for the help!
Topic archived. No new replies allowed.