//----------------------------------------------------------------------------//
void OpenGLTexture::restoreTexture()
{
if (d_grabBuffer)
{
generateOpenGLTexture();
// save old texture binding
GLuint old_tex;
glGetIntegerv(GL_TEXTURE_BINDING_2D, reinterpret_cast<GLint*>(&old_tex));
// bind the texture to restore to
glBindTexture(GL_TEXTURE_2D, d_ogltexture);
// reload the saved image data
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
static_cast<GLsizei>(d_size.d_width),
static_cast<GLsizei>(d_size.d_height),
0, GL_RGBA, GL_UNSIGNED_BYTE, d_grabBuffer);
// restore previous texture binding.
glBindTexture(GL_TEXTURE_2D, old_tex);
// free the grabbuffer
delete [] d_grabBuffer;
d_grabBuffer = 0;
}
}
//----------------------------------------------------------------------------//
OpenGLTexture::OpenGLTexture(OpenGLRenderer& owner, const Size& size) :
d_size(0, 0),
d_grabBuffer(0),
d_dataSize(0, 0),
d_owner(owner)
{
generateOpenGLTexture();
setTextureSize(size);
}
//----------------------------------------------------------------------------//
OpenGLTexture::OpenGLTexture(OpenGLRenderer& owner) :
d_size(0, 0),
d_grabBuffer(0),
d_dataSize(0, 0),
d_texelScaling(0, 0),
d_owner(owner)
{
generateOpenGLTexture();
}
//----------------------------------------------------------------------------//
OpenGLTexture::OpenGLTexture(OpenGLRenderer& owner, const String& filename,
const String& resourceGroup) :
d_size(0, 0),
d_grabBuffer(0),
d_dataSize(0, 0),
d_owner(owner)
{
generateOpenGLTexture();
loadFromFile(filename, resourceGroup);
}
//----------------------------------------------------------------------------//
OpenGL3Texture::OpenGL3Texture(OpenGL3Renderer& owner, const String& name) :
d_size(0, 0),
d_grabBuffer(0),
d_dataSize(0, 0),
d_texelScaling(0, 0),
d_owner(owner),
d_name(name)
{
initInternalPixelFormatFields(PF_RGBA);
generateOpenGLTexture();
}
//----------------------------------------------------------------------------//
OpenGL3Texture::OpenGL3Texture(OpenGL3Renderer& owner, const String& name,
const String& filename,
const String& resourceGroup) :
d_size(0, 0),
d_grabBuffer(0),
d_dataSize(0, 0),
d_owner(owner),
d_name(name)
{
initInternalPixelFormatFields(PF_RGBA);
generateOpenGLTexture();
loadFromFile(filename, resourceGroup);
}
//----------------------------------------------------------------------------//
void OpenGLTexture::restoreTexture()
{
if (!d_grabBuffer)
return;
generateOpenGLTexture();
setTextureSize_impl(d_size);
/* In OpenGL ES we used "glReadPixels" to grab the texture, reading just the
relevant rectangle. */
Sizef blit_size = OpenGLInfo::getSingleton().isUsingOpenglEs() ? d_dataSize : d_size;
blitFromMemory(d_grabBuffer, Rectf(glm::vec2(0, 0), blit_size));
// free the grabbuffer
delete[] d_grabBuffer;
d_grabBuffer = 0;
}
//----------------------------------------------------------------------------//
void OpenGLTexture::initialise(const String& filename, const String& resourceGroup)
{
initInternalPixelFormatFields(PF_RGBA);
generateOpenGLTexture();
loadFromFile(filename, resourceGroup);
}
//----------------------------------------------------------------------------//
void OpenGLTexture::initialise()
{
initInternalPixelFormatFields(PF_RGBA);
generateOpenGLTexture();
}
//----------------------------------------------------------------------------//
void OpenGLTexture::initialise(const Sizef& size)
{
initInternalPixelFormatFields(PF_RGBA);
generateOpenGLTexture();
setTextureSize(size);
}
