topic Re: glFramebufferTexture2DEXT problem in Developing Games on Intel Graphics

glFramebufferTexture2DEXT problem

trigve — Wed, 01 Jul 2009 09:44:27 GMT

Hi,
I have problem with glFramebufferTexture2DEXT function with intel GMA4500MHD 7.15.10.1688 drivers (using vista 32 bit). I'm attaching sample project which demonstrate failure (exception):

[cpp]First-chance exception at 0x10053930 in enum.exe: 0xC0000005: Access violation reading location 0xfeeeff86.
Unhandled exception at 0x10053930 in enum.exe: 0xC0000005: Access violation reading location 0xfeeeff86.[/cpp]

The code throw exception in enum.cpp on line 109:

[cpp]glDeleteTextures(1, &tid); // <--Crash--[/cpp]

If line 102 in the enum.cpp file

[cpp]glTexImage2D(target, 0, fmt, prob_size, prob_size, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,	target, tid, 0); // <--Here--[/cpp]

with comment "// <--Here--" is commented, no exception is thrown.

Here is the full listing:

[cpp]// enum.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include 
#include 
#include 
#include "GL/glew.h"

#ifndef _WIN32_WINNT
#	define _WIN32_WINNT 0x0501
#endif						

LRESULT __stdcall dummyWndProc(HWND hwnd, UINT umsg, WPARAM wp, LPARAM lp)
{
	return DefWindowProc(hwnd, umsg, wp, lp);
}

int main(int argc, char* argv[])
{
	LPCSTR dummyText = "WglDummy";
	HINSTANCE hinst = GetModuleHandle( NULL );

	WNDCLASS dummyClass;
	memset(&dummyClass, 0, sizeof(WNDCLASS));
	dummyClass.style = CS_OWNDC;
	dummyClass.hInstance = hinst;
	dummyClass.lpfnWndProc = &dummyWndProc;
	dummyClass.lpszClassName = dummyText;
	ATOM a = RegisterClass(&dummyClass);
	assert(a != NULL);

	HWND hwnd = CreateWindow(dummyText, dummyText, WS_CLIPCHILDREN | WS_CLIPSIBLINGS, 0, 0, 32, 32, 0, 0, hinst, 0);
	// if a simple CreateWindow fails, then boy are we in trouble...
	if (hwnd == NULL)
		return 1;
	// no chance of failure and no need to release thanks to CS_OWNDC
	HDC hdc = GetDC(hwnd); 
	if(hdc == NULL)
		return 2;
	// assign a simple OpenGL pixel format that everyone supports
	PIXELFORMATDESCRIPTOR pfd = { 
		sizeof(PIXELFORMATDESCRIPTOR),   // size of this pfd 
		1,                     // version number 
		PFD_DRAW_TO_WINDOW |   // support window 
		PFD_SUPPORT_OPENGL |   // support OpenGL 
		PFD_DOUBLEBUFFER,      // double buffered 
		PFD_TYPE_RGBA,         // RGBA type 
		24,                    // 24-bit color depth 
		0, 0, 0, 0, 0, 0,      // color bits ignored 
		8,                     // no alpha buffer 
		0,                     // shift bit ignored 
		0,                     // no accumulation buffer 
		0, 0, 0, 0,            // accum bits ignored 
		24,                    // 32-bit z-buffer 
		8,                     // no stencil buffer 
		0,                     // no auxiliary buffer 
		PFD_MAIN_PLANE,        // main layer 
		0,                     // reserved 
		0, 0, 0                // layer masks ignored 
	}; 
	// if these fail, wglCreateContext will also quietly fail
	int format;
	if ((format = ChoosePixelFormat(hdc, &pfd)) != 0)
	{
		if(SetPixelFormat(hdc, format, &pfd) == FALSE)
			return 3;
	}
	// Create and set GL context
	HGLRC hRC = wglCreateContext(hdc);
	if(hRC == NULL)
		return 4;
	if(!wglMakeCurrent(hdc, hRC))
		return 5;
	// Show The Window
	ShowWindow(hwnd,SW_SHOW);						
	SetFocus(hwnd);	
	// Initialize glew
	GLenum err = glewInit();
	if (GLEW_OK != err)
	{
		std::cout << "Error(" << err << "): " << glewGetErrorString(err) << std::endl;
		return 6;
	}
	// Create and attach framebuffer
	GLenum const fmt = GL_LUMINANCE8;
	short const prob_size = 16;
	GLuint fb, tid;
	glGenFramebuffersEXT(1, &fb);
	glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
	// Create and attach texture
	GLenum const target = GL_TEXTURE_2D;
	glGenTextures(1, &tid);
	glBindTexture(target, tid);
	// Set some default parameters so it won't fail on NVidia cards         
	glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, 0);
	glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
	glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
	glTexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
	glTexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

	glTexImage2D(target, 0, fmt, prob_size, prob_size, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
	glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,	target, tid, 0); // <--Here--
	// Check status
	GLuint status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
	// Delete texture and framebuffer
    glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
    glDeleteFramebuffersEXT(1, &fb); 

	glDeleteTextures(1, &tid); // <--Crash--
	
	// clean up our dummy window and class
	assert(DestroyWindow(hwnd) != 0);
	UnregisterClass(dummyText, hinst);

	return 0;
}

[/cpp]

Thanks

Trigve

Re: glFramebufferTexture2DEXT problem

trigve — Tue, 21 Jul 2009 08:58:45 GMT

Hello,
this problem is showstopper for me, if someone can look at it it would be great.

Thank you

Trigve

Re: glFramebufferTexture2DEXT problem

Chuck_De_Sylva — Tue, 21 Jul 2009 19:46:49 GMT

Quoting - trigve

Hi,
I have problem with glFramebufferTexture2DEXT function with intel GMA4500MHD 7.15.10.1688 drivers (using vista 32 bit). I'm attaching sample project which demonstrate failure (exception):

[cpp]First-chance exception at 0x10053930 in enum.exe: 0xC0000005: Access violation reading location 0xfeeeff86.
Unhandled exception at 0x10053930 in enum.exe: 0xC0000005: Access violation reading location 0xfeeeff86.[/cpp]

The code throw exception in enum.cpp on line 109:

[cpp]glDeleteTextures(1, &tid); // <--Crash--[/cpp]

If line 102 in the enum.cpp file

[cpp]glTexImage2D(target, 0, fmt, prob_size, prob_size, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,	target, tid, 0); // <--Here--[/cpp]

with comment "// <--Here--" is commented, no exception is thrown.

Here is the full listing:

[cpp]// enum.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include 
#include 
#include 
#include "GL/glew.h"

#ifndef _WIN32_WINNT
#	define _WIN32_WINNT 0x0501
#endif						

LRESULT __stdcall dummyWndProc(HWND hwnd, UINT umsg, WPARAM wp, LPARAM lp)
{
	return DefWindowProc(hwnd, umsg, wp, lp);
}

int main(int argc, char* argv[])
{
	LPCSTR dummyText = "WglDummy";
	HINSTANCE hinst = GetModuleHandle( NULL );

	WNDCLASS dummyClass;
	memset(&dummyClass, 0, sizeof(WNDCLASS));
	dummyClass.style = CS_OWNDC;
	dummyClass.hInstance = hinst;
	dummyClass.lpfnWndProc = &dummyWndProc;
	dummyClass.lpszClassName = dummyText;
	ATOM a = RegisterClass(&dummyClass);
	assert(a != NULL);

	HWND hwnd = CreateWindow(dummyText, dummyText, WS_CLIPCHILDREN | WS_CLIPSIBLINGS, 0, 0, 32, 32, 0, 0, hinst, 0);
	// if a simple CreateWindow fails, then boy are we in trouble...
	if (hwnd == NULL)
		return 1;
	// no chance of failure and no need to release thanks to CS_OWNDC
	HDC hdc = GetDC(hwnd); 
	if(hdc == NULL)
		return 2;
	// assign a simple OpenGL pixel format that everyone supports
	PIXELFORMATDESCRIPTOR pfd = { 
		sizeof(PIXELFORMATDESCRIPTOR),   // size of this pfd 
		1,                     // version number 
		PFD_DRAW_TO_WINDOW |   // support window 
		PFD_SUPPORT_OPENGL |   // support OpenGL 
		PFD_DOUBLEBUFFER,      // double buffered 
		PFD_TYPE_RGBA,         // RGBA type 
		24,                    // 24-bit color depth 
		0, 0, 0, 0, 0, 0,      // color bits ignored 
		8,                     // no alpha buffer 
		0,                     // shift bit ignored 
		0,                     // no accumulation buffer 
		0, 0, 0, 0,            // accum bits ignored 
		24,                    // 32-bit z-buffer 
		8,                     // no stencil buffer 
		0,                     // no auxiliary buffer 
		PFD_MAIN_PLANE,        // main layer 
		0,                     // reserved 
		0, 0, 0                // layer masks ignored 
	}; 
	// if these fail, wglCreateContext will also quietly fail
	int format;
	if ((format = ChoosePixelFormat(hdc, &pfd)) != 0)
	{
		if(SetPixelFormat(hdc, format, &pfd) == FALSE)
			return 3;
	}
	// Create and set GL context
	HGLRC hRC = wglCreateContext(hdc);
	if(hRC == NULL)
		return 4;
	if(!wglMakeCurrent(hdc, hRC))
		return 5;
	// Show The Window
	ShowWindow(hwnd,SW_SHOW);						
	SetFocus(hwnd);	
	// Initialize glew
	GLenum err = glewInit();
	if (GLEW_OK != err)
	{
		std::cout << "Error(" << err << "): " << glewGetErrorString(err) << std::endl;
		return 6;
	}
	// Create and attach framebuffer
	GLenum const fmt = GL_LUMINANCE8;
	short const prob_size = 16;
	GLuint fb, tid;
	glGenFramebuffersEXT(1, &fb);
	glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
	// Create and attach texture
	GLenum const target = GL_TEXTURE_2D;
	glGenTextures(1, &tid);
	glBindTexture(target, tid);
	// Set some default parameters so it won't fail on NVidia cards         
	glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, 0);
	glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
	glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
	glTexParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
	glTexParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

	glTexImage2D(target, 0, fmt, prob_size, prob_size, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
	glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,	target, tid, 0); // <--Here--
	// Check status
	GLuint status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
	// Delete texture and framebuffer
    glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
    glDeleteFramebuffersEXT(1, &fb); 

	glDeleteTextures(1, &tid); // <--Crash--
	
	// clean up our dummy window and class
	assert(DestroyWindow(hwnd) != 0);
	UnregisterClass(dummyText, hinst);

	return 0;
}

[/cpp]

Thanks

Trigve

I took your test case and entered a bug in our tracking system today, fyi.

Re: glFramebufferTexture2DEXT problem

trigve — Wed, 14 Oct 2009 15:39:07 GMT

Hi,
tried with the new drivers (7.15.10.1908) , with Vista SP2 installed and still without success. Can I somehow help to resolve this issue???

Thanks,

Trigve