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/**
* @file llimagegl.h
* @brief Object for managing images and their textures
*
* $LicenseInfo:firstyear=2001&license=viewergpl$
*
* Copyright (c) 2001-2009, 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 "llpointer.h"
#include "llrefcount.h"
#include "v2math.h"
#include "llrender.h"
#define BYTES_TO_MEGA_BYTES(x) ((x) >> 20)
#define MEGA_BYTES_TO_BYTES(x) ((x) << 20)
//============================================================================
class LLImageGL : public LLRefCount
{
friend class LLTexUnit;
public:
// Size calculation
static S32 dataFormatBits(S32 dataformat);
static S32 dataFormatBytes(S32 dataformat, S32 width, S32 height);
static S32 dataFormatComponents(S32 dataformat);
BOOL updateBindStats(S32 tex_mem) const ;
F32 getTimePassedSinceLastBound();
// 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);
//for server side use only.
// 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();
void analyzeAlpha(const void* data_in, S32 w, S32 h);
void calcAlphaChannelOffsetAndStride();
public:
virtual void dump(); // debugging info to llinfos
void setSize(S32 width, S32 height, S32 ncomponents);
void setComponents(S32 ncomponents) { mComponents = (S8)ncomponents ;}
// These 3 functions currently wrap glGenTextures(), glDeleteTextures(), and glTexImage2D()
// for tracking purposes and will be deprecated in the future
static void generateTextures(S32 numTextures, U32 *textures);
static void deleteTextures(S32 numTextures, U32 *textures);
static void setManualImage(U32 target, S32 miplevel, S32 intformat, S32 width, S32 height, U32 pixformat, U32 pixtype, const void *pixels);
BOOL createGLTexture() ;
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) const;
void destroyGLTexture();
void setExplicitFormat(LLGLint internal_format, LLGLenum primary_format, LLGLenum type_format = 0, BOOL swap_bytes = FALSE);
S32 getDiscardLevel() const { return mCurrentDiscardLevel; }
S32 getMaxDiscardLevel() const { return mMaxDiscardLevel; }
S32 getCurrentWidth() const { return mWidth ;}
S32 getCurrentHeight() const { return mHeight ;}
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 getHasGLTexture() const { return mTexName != 0; }
LLGLuint getTexName() const { return mTexName; }
BOOL getIsAlphaMask() const { return mIsMask; }
BOOL getIsResident(BOOL test_now = FALSE); // not const
void setTarget(const LLGLenum target, const LLTexUnit::eTextureType bind_target);
LLTexUnit::eTextureType getTarget(void) const { return mBindTarget; }
bool isGLTextureCreated(void) const { return mGLTextureCreated ; }
void setGLTextureCreated (bool initialized) { mGLTextureCreated = initialized; }
BOOL getUseMipMaps() const { return mUseMipMaps; }
void setUseMipMaps(BOOL usemips) { mUseMipMaps = usemips; }
BOOL isValidForSculpt(S32 discard_level, S32 image_width, S32 image_height, S32 ncomponents) ;
void updatePickMask(S32 width, S32 height, const U8* data_in);
BOOL getMask(const LLVector2 &tc);
void checkTexSize() const ;
// Sets the addressing mode used to sample the texture
// (such as wrapping, mirrored wrapping, and clamp)
// Note: this actually gets set the next time the texture is bound.
void setAddressMode(LLTexUnit::eTextureAddressMode mode);
LLTexUnit::eTextureAddressMode getAddressMode(void) const { return mAddressMode; }
// Sets the filtering options used to sample the texture
// (such as point sampling, bilinear interpolation, mipmapping, and anisotropic filtering)
// Note: this actually gets set the next time the texture is bound.
void setFilteringOption(LLTexUnit::eTextureFilterOptions option);
LLTexUnit::eTextureFilterOptions getFilteringOption(void) const { return mFilterOption; }
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
void setNeedsAlphaAndPickMask(BOOL need_mask);
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
U8* mPickMask; //downsampled bitmap approximation of alpha channel. NULL if no alpha channel
S8 mUseMipMaps;
S8 mHasExplicitFormat; // If false (default), GL format is f(mComponents)
S8 mAutoGenMips;
BOOL mIsMask;
BOOL mNeedsAlphaAndPickMask;
S8 mAlphaStride ;
S8 mAlphaOffset ;
bool mGLTextureCreated ;
LLGLuint mTexName;
U16 mWidth;
U16 mHeight;
S8 mCurrentDiscardLevel;
protected:
LLGLenum mTarget; // Normally GL_TEXTURE2D, sometimes something else (ex. cube maps)
LLTexUnit::eTextureType mBindTarget; // Normally TT_TEXTURE, sometimes something else (ex. cube maps)
bool mHasMipMaps;
LLGLboolean mIsResident;
S8 mComponents;
S8 mMaxDiscardLevel;
bool mTexOptionsDirty;
LLTexUnit::eTextureAddressMode mAddressMode; // Defaults to TAM_WRAP
LLTexUnit::eTextureFilterOptions mFilterOption; // Defaults to TFO_TRILINEAR
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 sGlobalTextureMemoryInBytes; // Tracks main memory texmem
static S32 sBoundTextureMemoryInBytes; // Tracks bound texmem for last completed frame
static S32 sCurBoundTextureMemory; // Tracks bound texmem for current frame
static U32 sBindCount; // Tracks number of texture binds for current frame
static U32 sUniqueCount; // Tracks number of unique texture binds for current frame
static BOOL sGlobalUseAnisotropic;
static LLImageGL* sDefaultGLTexture ;
#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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