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Graphics / sf::Image.LoadFromFile might be causing invalid pointers?

« on: February 25, 2010, 02:04:17 am »

Hello,

I'm getting this really weird problem in my SFML/OpenGL application. I've created my application, which should render a triangle in multiple colors and then a square with a texture on it. I used SFML's texture loading for my texture, but then I ran into this really weird problem. I'm sure it's this line specifically because I commented out everything else and it still happened. When I run my program, it beeps once about ever third of a second, and shows a bunch of stuff in the console, and then it crashes saying that the OpenGL buffer got overrun (even when I don't use OpenGL). Here's my code:

Code: [Select]

#include <SFML/Window.hpp>
#include <SFML/Graphics.hpp>

int main() {
sf::Window window(sf::VideoMode(800, 600), "Rendering", sf::Style::Close);

sf::Image image;

        //Problem line....
if(!image.LoadFromFile("Texture.png")) {
return 1;
}

GLuint textureID;
glGenTextures(1, &textureID);
glBindTexture(GL_TEXTURE_2D, textureID);

glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, image.GetWidth(), image.GetHeight(),
0, GL_RGB, GL_UNSIGNED_BYTE, image.GetPixelsPtr());

glClearDepth(1.0f);
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);

glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);

glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(60.0f, 1.0f, 1.0f, 500.0f);

while (window.IsOpened()) {
sf::Event evnt;
while(window.GetEvent(evnt)) {
switch(evnt.Type) {
case sf::Event::Closed:
window.Close();
}

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

glMatrixMode(GL_MODELVIEW);
glLoadIdentity();

glTranslatef(-1.5f,0.0f,-6.0f);

glBegin(GL_TRIANGLES);
glColor4f(0.0f,255.0f,255.0f,255.0f);
glVertex3f( 0.0f, 1.0f, 0.0f);

glColor4f(255.0f,0.0f,255.0f,255.0f);
glVertex3f(-1.0f,-1.0f, 0.0f);

glColor4f(255.0f,255.0f,0.0f,255.0f);
glVertex3f( 1.0f,-1.0f, 0.0f);
glEnd();

glTranslatef(3.0f,0.0f,0.0f);
glRotatef(-25.0f, 0.0f, 1.0f, 0.0f);

glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, textureID);

glBegin(GL_QUADS);
glTexCoord2f(1.0f,1.0f);
glVertex3f( -1.0f, 1.0f, 0.0f);
glTexCoord2f(0.0f,0.0f);
glVertex3f(-1.0f,0.0f, 0.0f);
glTexCoord2f(1.0f,0.0f);
glVertex3f( 0.0f,0.0f, 0.0f);
glTexCoord2f(1.0f,1.0f);
glVertex3f( 0.0f,1.0f, 0.0f);
glEnd();

glDisable(GL_TEXTURE_2D);

window.Display();
}
}

return EXIT_SUCCESS;
}

And here's the error I get in a pop-up window asking me to break/continue the program.

Code: [Select]

Unhandled exception at 0x737a84b4 in OpenGL render.exe: 0xC0000005: Access violation reading location 0x003e9000.

I'm running a Radeon HD 5850 with SFML 1.5 prebuilt. Thanks for any help.

2

DotNet / .NET Interface

« on: February 23, 2010, 07:59:07 pm »

Hello,

I'm trying to use SFML in C#, because I'm porting some C++ code over for a level editor. I have a few questions about what it can do before I follow that path.

1- Can SFML be rendered in a Windows Form control? I am setting up the UI and serialization stuff in C# now, but will it be as simple as dragging in a render window for SFML into the tab control I have set up, or could I render into the tab control or a panel?

2- Does SFML allow me to use OpenGL with SFML in C#? I've seen some things like the Tao Framework. Can I just use the OpenGL functions from Tao in the SFML control, like I would with normal SFML?

3- Can I just port my C++ library to a C# library and use my own interfaces based on SFML?

I want the editor to be WYSIWYG, so I need to find a way to get identical rendering and audio on both C++ and C# with minimal effort, which is one reason I chose SFML. Thanks,