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/**
* @file llimagegl.h
* @brief Object for managing images and their textures
*
* $LicenseInfo:firstyear=2001&license=viewergpl$
*
* Copyright (c) 2001-2008, Linden Research, Inc.
*
* Second Life Viewer Source Code
* The source code in this file ("Source Code") is provided by Linden Lab
* to you under the terms of the GNU General Public License, version 2.0
* ("GPL"), unless you have obtained a separate licensing agreement
* ("Other License"), formally executed by you and Linden Lab. Terms of
* the GPL can be found in doc/GPL-license.txt in this distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
*
* There are special exceptions to the terms and conditions of the GPL as
* it is applied to this Source Code. View the full text of the exception
* in the file doc/FLOSS-exception.txt in this software distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/flossexception
*
* By copying, modifying or distributing this software, you acknowledge
* that you have read and understood your obligations described above,
* and agree to abide by those obligations.
*
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
* $/LicenseInfo$
*/
#ifndef LL_LLIMAGEGL_H
#define LL_LLIMAGEGL_H
#include "llimage.h"
#include "llgltypes.h"
#include "llmemory.h"
//============================================================================
class LLImageGL : public LLRefCount
{
public:
// Size calculation
static S32 dataFormatBits(S32 dataformat);
static S32 dataFormatBytes(S32 dataformat, S32 width, S32 height);
static S32 dataFormatComponents(S32 dataformat);
// Wrapper for glBindTexture that keeps LLImageGL in sync.
// Usually you want stage = 0 and bind_target = GL_TEXTURE_2D
static void bindExternalTexture( LLGLuint gl_name, S32 stage, LLGLenum bind_target);
static void unbindTexture(S32 stage, LLGLenum target);
static void unbindTexture(S32 stage); // Uses GL_TEXTURE_2D (not a default arg to avoid gl.h dependency)
// needs to be called every frame
static void updateStats(F32 current_time);
// Save off / restore GL textures
static void destroyGL(BOOL save_state = TRUE);
static void restoreGL();
// Sometimes called externally for textures not using LLImageGL (should go away...)
static S32 updateBoundTexMem(const S32 delta);
static bool checkSize(S32 width, S32 height);
// Not currently necessary for LLImageGL, but required in some derived classes,
// so include for compatability
static BOOL create(LLPointer<LLImageGL>& dest, BOOL usemipmaps = TRUE);
static BOOL create(LLPointer<LLImageGL>& dest, U32 width, U32 height, U8 components, BOOL usemipmaps = TRUE);
static BOOL create(LLPointer<LLImageGL>& dest, const LLImageRaw* imageraw, BOOL usemipmaps = TRUE);
public:
LLImageGL(BOOL usemipmaps = TRUE);
LLImageGL(U32 width, U32 height, U8 components, BOOL usemipmaps = TRUE);
LLImageGL(const LLImageRaw* imageraw, BOOL usemipmaps = TRUE);
protected:
virtual ~LLImageGL();
BOOL bindTextureInternal(const S32 stage = 0) const;
public:
virtual void dump(); // debugging info to llinfos
virtual BOOL bind(const S32 stage = 0) const;
void setSize(S32 width, S32 height, S32 ncomponents);
BOOL createGLTexture(S32 discard_level, const LLImageRaw* imageraw, S32 usename = 0);
BOOL createGLTexture(S32 discard_level, const U8* data, BOOL data_hasmips = FALSE, S32 usename = 0);
void setImage(const LLImageRaw* imageraw);
void setImage(const U8* data_in, BOOL data_hasmips = FALSE);
BOOL setSubImage(const LLImageRaw* imageraw, S32 x_pos, S32 y_pos, S32 width, S32 height);
BOOL setSubImage(const U8* datap, S32 data_width, S32 data_height, S32 x_pos, S32 y_pos, S32 width, S32 height);
BOOL setSubImageFromFrameBuffer(S32 fb_x, S32 fb_y, S32 x_pos, S32 y_pos, S32 width, S32 height);
BOOL setDiscardLevel(S32 discard_level);
// Read back a raw image for this discard level, if it exists
BOOL readBackRaw(S32 discard_level, LLImageRaw* imageraw, bool compressed_ok);
void destroyGLTexture();
void setClamp(BOOL clamps, BOOL clampt);
void setMipFilterNearest(BOOL nearest, BOOL min_nearest = FALSE);
void setExplicitFormat(LLGLint internal_format, LLGLenum primary_format, LLGLenum type_format = 0, BOOL swap_bytes = FALSE);
void dontDiscard() { mDontDiscard = 1; }
S32 getDiscardLevel() const { return mCurrentDiscardLevel; }
S32 getMaxDiscardLevel() const { return mMaxDiscardLevel; }
S32 getWidth(S32 discard_level = -1) const;
S32 getHeight(S32 discard_level = -1) const;
U8 getComponents() const { return mComponents; }
S32 getBytes(S32 discard_level = -1) const;
S32 getMipBytes(S32 discard_level = -1) const;
BOOL getBoundRecently() const;
LLGLenum getPrimaryFormat() const { return mFormatPrimary; }
BOOL getClampS() const { return mClampS; }
BOOL getClampT() const { return mClampT; }
BOOL getMipFilterNearest() const { return mMipFilterNearest; }
BOOL getHasGLTexture() const { return mTexName != 0; }
LLGLuint getTexName() const { return mTexName; }
BOOL getIsResident(BOOL test_now = FALSE); // not const
void setTarget(const LLGLenum target, const LLGLenum bind_target);
BOOL getUseMipMaps() const { return mUseMipMaps; }
void setUseMipMaps(BOOL usemips) { mUseMipMaps = usemips; }
BOOL getUseDiscard() const { return mUseMipMaps && !mDontDiscard; }
BOOL getDontDiscard() const { return mDontDiscard; }
protected:
void init(BOOL usemipmaps);
virtual void cleanup(); // Clean up the LLImageGL so it can be reinitialized. Be careful when using this in derived class destructors
public:
// Various GL/Rendering options
S32 mTextureMemory;
mutable F32 mLastBindTime; // last time this was bound, by discard level
private:
LLPointer<LLImageRaw> mSaveData; // used for destroyGL/restoreGL
S8 mUseMipMaps;
S8 mHasMipMaps;
S8 mHasExplicitFormat; // If false (default), GL format is f(mComponents)
S8 mAutoGenMips;
protected:
LLGLenum mTarget; // Normally GL_TEXTURE2D, sometimes something else (ex. cube maps)
LLGLenum mBindTarget; // NOrmally GL_TEXTURE2D, sometimes something else (ex. cube maps)
LLGLuint mTexName;
LLGLboolean mIsResident;
U16 mWidth;
U16 mHeight;
S8 mComponents;
S8 mMaxDiscardLevel;
S8 mCurrentDiscardLevel;
S8 mDontDiscard; // Keep full res version of this image (for UI, etc)
S8 mClampS; // Need to save clamp state
S8 mClampT;
S8 mMipFilterNearest; // if TRUE, set magfilter to GL_NEAREST
LLGLint mFormatInternal; // = GL internalformat
LLGLenum mFormatPrimary; // = GL format (pixel data format)
LLGLenum mFormatType;
BOOL mFormatSwapBytes;// if true, use glPixelStorei(GL_UNPACK_SWAP_BYTES, 1)
// STATICS
public:
static std::set<LLImageGL*> sImageList;
static S32 sCount;
static F32 sLastFrameTime;
static LLGLuint sCurrentBoundTextures[MAX_GL_TEXTURE_UNITS]; // Currently bound texture ID
// Global memory statistics
static S32 sGlobalTextureMemory; // Tracks main memory texmem
static S32 sBoundTextureMemory; // Tracks bound texmem for last completed frame
static S32 sCurBoundTextureMemory; // Tracks bound texmem for current frame
static BOOL sGlobalUseAnisotropic;
#if DEBUG_MISS
BOOL mMissed; // Missed on last bind?
BOOL getMissed() const { return mMissed; };
#else
BOOL getMissed() const { return FALSE; };
#endif
};
#endif // LL_LLIMAGEGL_H
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