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Code Issues Releases Wiki Activity

Clean up framebuffer code a little

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This commit is contained in:
fgenesis 2016-11-15 04:48:21 +01:00
parent 0db3c8242c
commit 90d70c117b
1 changed files with 60 additions and 68 deletions
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128
BBGE/FrameBuffer.cpp
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@ -83,78 +83,73 @@ bool FrameBuffer::init(int width, int height, bool fitToScreen)
w=width;
h=height;
char *ext = (char*)glGetString( GL_EXTENSIONS );
std::ostringstream os;
os << "Loading EXT_framebuffer_object (" << w << ", " << h << ")";
debugLog(os.str());
if( strstr( ext, "EXT_framebuffer_object" ) == NULL )
if( !glIsRenderbufferEXT || !glBindRenderbufferEXT || !glDeleteRenderbuffersEXT ||
!glGenRenderbuffersEXT || !glRenderbufferStorageEXT || !glGetRenderbufferParameterivEXT ||
!glIsFramebufferEXT || !glBindFramebufferEXT || !glDeleteFramebuffersEXT ||
!glGenFramebuffersEXT || !glCheckFramebufferStatusEXT || !glFramebufferTexture1DEXT ||
!glFramebufferTexture2DEXT || !glFramebufferTexture3DEXT || !glFramebufferRenderbufferEXT||
!glGetFramebufferAttachmentParameterivEXT)
{
debugLog("EXT_framebuffer_object extension was not found");
debugLog("One or more EXT_framebuffer_object functions were not found");
return false;
}
else
{
if( !glIsRenderbufferEXT || !glBindRenderbufferEXT || !glDeleteRenderbuffersEXT ||
!glGenRenderbuffersEXT || !glRenderbufferStorageEXT || !glGetRenderbufferParameterivEXT ||
!glIsFramebufferEXT || !glBindFramebufferEXT || !glDeleteFramebuffersEXT ||
!glGenFramebuffersEXT || !glCheckFramebufferStatusEXT || !glFramebufferTexture1DEXT ||
!glFramebufferTexture2DEXT || !glFramebufferTexture3DEXT || !glFramebufferRenderbufferEXT||
!glGetFramebufferAttachmentParameterivEXT)
{
debugLog("One or more EXT_framebuffer_object functions were not found");
return false;
}
//
// Create a frame-buffer object and a render-buffer object...
//
glGenFramebuffersEXT( 1, &g_frameBuffer );
glGenRenderbuffersEXT( 1, &g_depthRenderBuffer );
// Initialize the render-buffer for usage as a depth buffer.
// We don't really need this to render things into the frame-buffer object,
// but without it the geometry will not be sorted properly.
glBindRenderbufferEXT( GL_RENDERBUFFER_EXT, g_depthRenderBuffer );
glRenderbufferStorageEXT( GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, width, height );
//
// Check for errors...
//
GLenum status = glCheckFramebufferStatusEXT( GL_FRAMEBUFFER_EXT );
switch( status )
{
case GL_FRAMEBUFFER_COMPLETE_EXT:
break;
case GL_FRAMEBUFFER_UNSUPPORTED_EXT:
debugLog("GL_FRAMEBUFFER_UNSUPPORTED_EXT!");
return false;
break;
default:
return false;
}
glGenTextures( 1, &g_dynamicTextureID );
glBindTexture( GL_TEXTURE_2D, g_dynamicTextureID );
// GL_LINEAR
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB,
width, height,
0, GL_BGR, GL_UNSIGNED_BYTE, 0 );
}
//
// Create a frame-buffer object and a render-buffer object...
//
glGenFramebuffersEXT( 1, &g_frameBuffer );
glGenRenderbuffersEXT( 1, &g_depthRenderBuffer );
// Initialize the render-buffer for usage as a depth buffer.
// We don't really need this to render things into the frame-buffer object,
// but without it the geometry will not be sorted properly.
glBindRenderbufferEXT( GL_RENDERBUFFER_EXT, g_depthRenderBuffer );
glRenderbufferStorageEXT( GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, width, height );
glGenTextures( 1, &g_dynamicTextureID );
glBindTexture( GL_TEXTURE_2D, g_dynamicTextureID );
// GL_LINEAR
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB,
width, height,
0, GL_BGR, GL_UNSIGNED_BYTE, 0 );
// Put together
glBindFramebufferEXT( GL_FRAMEBUFFER_EXT, g_frameBuffer );
glFramebufferTexture2DEXT( GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, g_dynamicTextureID, 0 );
glFramebufferRenderbufferEXT( GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, g_depthRenderBuffer );
//
// Check for errors...
//
GLenum status = glCheckFramebufferStatusEXT( GL_FRAMEBUFFER_EXT );
glBindTexture(GL_TEXTURE_2D, 0);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
switch( status )
{
case GL_FRAMEBUFFER_COMPLETE_EXT:
break;
case GL_FRAMEBUFFER_UNSUPPORTED_EXT:
debugLog("GL_FRAMEBUFFER_UNSUPPORTED_EXT!");
default:
unloadDevice();
return false;
}
debugLog("Done");
inited = true;
@ -168,7 +163,8 @@ bool FrameBuffer::init(int width, int height, bool fitToScreen)
void FrameBuffer::unloadDevice()
{
debugLog("frameBuffer::unloadDevice");
inited = false;
enabled = false;
#ifdef BBGE_BUILD_FRAMEBUFFER
@ -226,12 +222,8 @@ void FrameBuffer::startCapture()
glBindFramebufferEXT( GL_FRAMEBUFFER_EXT, g_frameBuffer );
glFramebufferTexture2DEXT( GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, g_dynamicTextureID, 0 );
glFramebufferRenderbufferEXT( GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, g_depthRenderBuffer );
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
#endif
}