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/*
   Copyright (c) 2013 DIVIDE-Studio
   Copyright (c) 2009 Ionut Cava

   This file is part of DIVIDE Framework.
   
   Permission is hereby granted, free of charge, to any person obtaining a copy of this software
   and associated documentation files (the "Software"), to deal in the Software without restriction,
   including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, 
   and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, 
   subject to the following conditions:

   The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
   INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE 
   OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 */

#ifndef _SSAO_PRE_RENDER_OPERATOR_H_
#define _SSAO_PRE_RENDER_OPERATOR_H_

#include "Rendering/PostFX/Headers/PreRenderOperator.h"
///This Operator processes the entire geometry via the SSAOShader, generating a intermediate FBO
///The intermidiate FBO contains each object's normals in the "rgb" components, and the linear depth in the "a" component
///The intermidiate FBO is then passed as a 2D sampler in the second stage shader, processed and produces a full screen texure as a result
///The result FBO contains AO ambient values that should be added to the final fragment's ambient lighting value
class ShaderProgram;
class Quad3D;
class Texture;
typedef Texture Texture2D;
class FrameBufferObject;
class SSAOPreRenderOperator : public PreRenderOperator {
public:
	SSAOPreRenderOperator(Quad3D* const target, FrameBufferObject* result, const vec2<U16>& resolution, SamplerDescriptor* const sampler);
	~SSAOPreRenderOperator();

	void operation();
	void reshape(I32 width, I32 height);

private:
	ShaderProgram* _stage1Shader;
	ShaderProgram* _stage2Shader;
	FrameBufferObject* _outputFBO;
	FrameBufferObject* _normalsFBO;
	Texture2D*		   _colorNoise;
};

#endif

Commits for Divide-Framework/trunk/Source Code/Rendering/PostFX/CustomOperators/Headers/SSAOPreRenderOperator.h

Diff revisions: vs.
Revision Author Commited Message
168 Diff Diff k1ngp1n picture k1ngp1n Sat 26 Oct, 2013 19:03:21 +0000

- Reworked the Camera class[[BR]]
— Now fully quaternion based [[BR]]
— Basic camera types added but not used yet (third person, first person, orbit) [[BR]]
- Cleaned up Material and Texture handling [[BR]]
- Added clipping plane support [[BR]]
— Similar to OpenGL fixed-function clip planes but fully shader driven [[BR]]
— Added a new class, “Plane”, that helps define clip planes [[BR]]
- Optimized the Singleton class to allow faster “getInstance” calls without performance penalties [[BR]]
-- “createInstance” must be called for each singleton class before usage. Or “gerOrCreateInstance” can be used, which is basically the former “getInstance” implementation [[BR]]
- Improved console logging by changing some heap allocations to stack and removing dependencies on the std::string class [[BR]]
- Added a lot of performance optimizations related to coding standards and redundant calculations [[BR]]
— e.g. Frustum AABB check didn’t need to recompute the AABB points as they were calculated already [[BR]]
— e.g. A vector did not need to be set to 0 on initialization as that is already it’s default state on creation [[BR]]
— e.g. Faster Framerate and Timing calculations by using less member variables that are not needed outsied of calling functions [[BR]]
- The SceneState now contains the SceneRenderState and is passed on to the SceneGraph’s update calls [[BR]]
- Better material export/import to/from XML format [[BR]]
- More bug fixes and cleanups [[BR]]

160 Diff Diff k1ngp1n picture k1ngp1n Wed 10 Jul, 2013 17:07:04 +0000

[Ionut] [[BR]]
- Changed licensing from LGPL to the MIT license [[BR]]
— Code can now be used in non-commercial or commercial closed or open source projects [[BR]]

152 Diff Diff k1ngp1n picture k1ngp1n Thu 20 Jun, 2013 14:23:31 +0000

[Ionut] [[BR]]
- New rendering pipeline (experimental and unstable): [[BR]]
— OpenGL 3.x clean context (glLight commands are still used for now, but UBO support is there, but not used yet) [[BR]]
— Custom matrix stacks and UBO based shader data (UBOs cause some link errors on some nVidia cards)[[BR]]
— Multi-threaded texture loading and shader compilation (mt shader compilation disabled for now. needs more tests) [[BR]]
— VAO rendering is self contained (no more enable/disable calls before a draw request) [[BR]]
— Render instance class used for rendering information [[BR]]
[[BR]]
- New unique ID generation base class: GUIDWrapper. Each class that derives from this, gets an application wide unique id on construction [[BR]]
- Added base code for an in-game editor using CEGUI [[BR]]
- Replaced some mutex locks with lockless data structures or atomic data [[BR]]
- CEGUI 0.8.2, FTGL-GL3 and GLIM 0.4 modified to support GLEW_MX if defined [[BR]]
- Dropped VS2008 support [[BR]]
- Networking library, server framework and ReCast files are now projects inside the Divide Framework solution [[BR]]
- New console command “setFov” that modifies the horizontal FoV value in realtime [[BR]]
- New console command “recompileShader” that reparses shader files, recompiles shaders and relinks shader programs who’s names match or contain the argument string [[BR]]
- New debug utility: axis angle drawn in corner of the screen if needed [[BR]]
- More ‘const’-s pasted around the code, more loop performance tweaks (allocations before a loop, tighter loops, etc), more utility member functions added to various classes [[BR]]

146 Diff Diff k1ngp1n picture k1ngp1n Wed 10 Apr, 2013 13:20:15 +0000

[Ionut] [[BR]]
*Final LightBranch updates 2/3 : Main trunk merge and build test (VC90, VC100, gDebugger) [[BR]]
-Merged light branch with trunk [[BR]]
-Deleted light branch [[BR]]

141 Diff Diff k1ngp1n picture k1ngp1n Wed 30 Jan, 2013 19:35:31 +0000

[Ionut] [[BR]]
-Updated to boost 1.52 and CEGUI 0.7.9 [[BR]]
-Updated to PhysX 3.2 [[BR]]
-Updated copyright notices [[BR]]

119 Diff Diff k1ngp1n picture k1ngp1n Fri 08 Jun, 2012 19:40:41 +0000

[Ionut] [[BR]]
-Reworked resolution change callbacks and render target resizing [[BR]]
-Changed Depth of Field o a proper “PreRenderOperator” [[BR]]
-AIManager is now created and started by the “Kernel” [[BR]]
-LightManager is now handled in the “Kernel”. Individual lights are still scene’s responsibility [[BR]]
-Added a “preLoad” method to scene’s used to setup the engine before loading any assets (eg: setting deferred mode) [[BR]]
-Fixed a small bug in sensor addition to “AIEntity” [[BR]]
-Fixed a bug related to refreshing VBO data [[BR]]
-Fixed a bug related to Bloom outputFBO not unbinding [[BR]]
-Scene’s “setInitialData()” is renamed to “loadXMLAssets()” and is automatically called before Scene’s “load()” is called [[BR]]

118 Diff Diff k1ngp1n picture k1ngp1n Thu 07 Jun, 2012 18:25:10 +0000

[Ionut] [[BR]]
-Decoupled “Scene” and “SceneManager” from “InputManager” [[BR]]
--All input events are routed through the “Kernel” now [[BR]]
--Renamed “InputManager” to “InputInterface” [[BR]]
-Decoupled “Application” class from the rest of the engine except for the “Kernel” and “GUI” (for resize callbacks) [[BR]]
-Added cached resolution values to classes so no queries to “Application” are needed anymore [[BR]]
-Added a missing option from “config.xml” to enable or disable animations [[BR]]
Forgot to commit changed scene xml’s after the romanian>english translation [[BR]]
-All window dimension references are renamed to resolution and all variables related to it are now U16’s as floats are irrelevant (what’s a half pixel? for examle) [[BR]]
-GUI resize callback is now called from “GFXDevice” instead of “GLWrapper” (will be moved to “Kernel” soon together with the “PostFX” resize callback) [[BR]]

101 Diff Diff k1ngp1n picture k1ngp1n Wed 07 Mar, 2012 13:56:56 +0000

[Ionut] [[BR]]
-Added GLSL effect-like file support using GLSW [http://prideout.net/blog/?p=11] [[BR]]
-Added GLSL “#include” support. Now shader functions can be define in separate frag/vert files as atoms and included in the glsl effect file [[BR]]
-Added more DoxyGen-comments[[BR]]

100 Diff Diff k1ngp1n picture k1ngp1n Mon 05 Mar, 2012 17:45:11 +0000

[Ionut] [[BR]]
Features: [[BR]]
-Added a physics system interface instead of direct PhysX interaction to allow other physics engines (Bullet, ODE etc) to be easily implemented [[BR]]
--This will aid in Object-Object collisions and character control in future revisions [[BR]]
-Added an Ogre3D inspired FrameListener which now allows Before-frame/during-frame/after-frame event plugins of callbacks [[BR]]
-Added a renderInViewport system to draw elements in a user defined rectangle on screen [[BR]]
--Current uses: shadowmap preview (F10) [[BR]]
-Separated Shaders from ShaderPrograms[[BR]]
--ShaderPrograms can now use multiple Shaders [[BR]]
-Error output is now sent to errors.log[[BR]]
-All SceneNode based elements now have a postDraw calls as well [[BR]]
-A cubemap generating function has been added to the GFXDevice class[[BR]]
-Added debug only print options to the Console class [[BR]]
[[BR]]
Performance: [[BR]]
-All shadows are now filtered by a faster Gaussian 3x3 blur filter [[BR]]
-All renderables are now sorted and rendered by material/front-to-back/back-to-front, depending on case [[BR]]
-RenderQueue now sorts and queue’s translucent and opaque objects separately[[BR]]
-Shader uniforms/attributes are now cached to reduce number of address calls to the GPU[[BR]]
-Shaders are now cached, so that if multiple ShaderPrograms use an already compiled Shader, that Shader is returned from memory instead of creating a new copy[[BR]]
-Shaders are not unbound/rebound except when an objects demands so (vastly improves performance)[[BR]]
-Reduced calls to glEnable[[BR]]
[[BR]]
Bug fixes: [[BR]]
-Preprocessor configurations now work properly [[BR]]
-Video API is now unloaded before destruction [[BR]]
-Manager base class now properly frees memory [[BR]]
-Materials are saved to XML only if they are changed at any point [[BR]]

99 k1ngp1n picture k1ngp1n Fri 10 Feb, 2012 22:17:24 +0000

[ Ionut ] [[BR]]
- Added a PreRenderStage Builder that allows multiple pre-render stages to be added to the pre-render step [[ BR ]]
--A PreRenderStage is composed of a series of PreRender Operators that generate certain PostFX outputs that are used by the PostFX class [[BR]]
--Each PreRenderOperator, similar to a “plugin”, can use any number of input FBO’s, any input shader and render target to generate an effect [[BR]]
--Rendering pipeline has been modified to allow the specification of current render stage [[BR]]
[[BR]]
Added C++<>Shader attribute passing support for shaders[[BR]]
-Added per-pixel fog [[BR]]
-Fixed some typo’s in uniform names [[BR]]
-Optimized shadow generation pipeline [[BR]]
-Added cast/receive shadow options for materials [[BR]]
-FBO’s now clear color and depth buffers when Begin() is called [[BR]]
-Fixed loading of primitives' material properties [[BR]]
-All shaders now use the same shadowmapping techniques [[BR]]
-Quad3D’s can now be modified by specifying a target rect [[BR]]
-Split the “lighting.frag” shader in 3 variants: one that only applies color properties, one with textures and one with bump-mapping [[BR]]
--This reduces fragment shader complexity for the first 2 shaders [[BR]]
--Each material change will now force a shader recalculation for the object [[BR]]
-Renamed sphere’s “size” member to “radius” [[BR]]