//----------------------------------------------------------------------------//
void OpenGLApplePBTextureTarget::clear()
{
enablePBuffer();
glDisable(GL_SCISSOR_TEST);
glClear(GL_COLOR_BUFFER_BIT);
glEnable(GL_SCISSOR_TEST);
disablePBuffer();
}
//----------------------------------------------------------------------------//
void OpenGLApplePBTextureTarget::deactivate()
{
glFlush();
OpenGLRenderTarget::deactivate();
// Clear the blend mode again so the next setupRenderingBlendMode call
// is forced to update states for the main / previous context.
d_owner.setupRenderingBlendMode(BM_INVALID);
disablePBuffer();
}
//----------------------------------------------------------------------------//
void OpenGLGLXPBTextureTarget::deactivate()
{
// grab what we rendered into the texture
glBindTexture(GL_TEXTURE_2D, d_texture);
glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8,
0, 0,
static_cast<GLsizei>(d_area.d_right),
static_cast<GLsizei>(d_area.d_bottom), 0);
disablePBuffer();
OpenGLRenderTarget::deactivate();
}
//----------------------------------------------------------------------------//
void OpenGLWGLPBTextureTarget::deactivate()
{
// grab what we rendered into the texture
glBindTexture(GL_TEXTURE_2D, d_texture);
glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8,
0, 0,
static_cast<GLsizei>(d_area.right()),
static_cast<GLsizei>(d_area.bottom()), 0);
disablePBuffer();
// Clear the blend mode again so the next setupRenderingBlendMode call
// is forced to update states for the main / previous context.
d_owner.setupRenderingBlendMode(BM_INVALID);
OpenGLTextureTarget::deactivate();
}
//----------------------------------------------------------------------------//
void OpenGLWGLPBTextureTarget::clear()
{
// save the old clear colour
GLfloat old_colour[4];
glGetFloatv(GL_COLOR_CLEAR_VALUE, old_colour);
// save old scissor state
GLboolean old_scissor;
glGetBooleanv(GL_SCISSOR_TEST, &old_scissor);
enablePBuffer();
glDisable(GL_SCISSOR_TEST);
glClearColor(0,0,0,0);
glClear(GL_COLOR_BUFFER_BIT);
disablePBuffer();
// restore old scissor state
if (GL_TRUE == old_scissor)
glEnable(GL_SCISSOR_TEST);
// restore the old clear colour
glClearColor(old_colour[0], old_colour[1], old_colour[2], old_colour[3]);
}
//----------------------------------------------------------------------------//
OpenGLGLXPBTextureTarget::OpenGLGLXPBTextureTarget(OpenGLRenderer& owner) :
OpenGLTextureTarget(owner),
d_pbuffer(0)
{
if (!GLXEW_VERSION_1_3)
throw InvalidRequestException("System does not support GLX >= 1.3 "
"required by CEGUI pbuffer usage under GLX");
d_dpy = glXGetCurrentDisplay();
selectFBConfig();
createContext();
initialiseTexture();
// set default size (and cause initialisation of the pbuffer)
declareRenderSize(Size(DEFAULT_SIZE, DEFAULT_SIZE));
// set some states as a one-time thing (because we use a separate context)
enablePBuffer();
glEnable(GL_SCISSOR_TEST);
glEnable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_SECONDARY_COLOR_ARRAY);
glDisableClientState(GL_INDEX_ARRAY);
glDisableClientState(GL_NORMAL_ARRAY);
glDisableClientState(GL_FOG_COORDINATE_ARRAY);
glDisableClientState(GL_EDGE_FLAG_ARRAY);
glClearColor(0,0,0,0);
disablePBuffer();
}
