diff options
Diffstat (limited to 'indra/llrender/llimagegl.cpp')
| -rw-r--r-- | indra/llrender/llimagegl.cpp | 140 |
1 files changed, 100 insertions, 40 deletions
diff --git a/indra/llrender/llimagegl.cpp b/indra/llrender/llimagegl.cpp index 7860b32f34..2f02ccf30b 100644 --- a/indra/llrender/llimagegl.cpp +++ b/indra/llrender/llimagegl.cpp @@ -2,25 +2,31 @@ * @file llimagegl.cpp * @brief Generic GL image handler * - * $LicenseInfo:firstyear=2001&license=viewerlgpl$ - * Second Life Viewer Source Code - * Copyright (C) 2010, Linden Research, Inc. + * $LicenseInfo:firstyear=2001&license=viewergpl$ + * + * Copyright (c) 2001-2009, Linden Research, Inc. * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; - * version 2.1 of the License only. + * 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 * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. + * 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 * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * 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. * - * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA + * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO + * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, + * COMPLETENESS OR PERFORMANCE. * $/LicenseInfo$ */ @@ -103,20 +109,11 @@ void LLImageGL::checkTexSize(bool forced) const { if ((forced || gDebugGL) && mTarget == GL_TEXTURE_2D) { - { - //check viewport - GLint vp[4] ; - glGetIntegerv(GL_VIEWPORT, vp) ; - llcallstacks << "viewport: " << vp[0] << " : " << vp[1] << " : " << vp[2] << " : " << vp[3] << llcallstacksendl ; - } - GLint texname; glGetIntegerv(GL_TEXTURE_BINDING_2D, &texname); BOOL error = FALSE; if (texname != mTexName) { - llinfos << "Bound: " << texname << " Should bind: " << mTexName << " Default: " << LLImageGL::sDefaultGLTexture->getTexName() << llendl; - error = TRUE; if (gDebugSession) { @@ -1648,7 +1645,7 @@ void LLImageGL::calcAlphaChannelOffsetAndStride() } } -void LLImageGL::analyzeAlpha(const void* data_in, S32 w, S32 h) +void LLImageGL::analyzeAlpha(const void* data_in, U32 w, U32 h) { if(!mNeedsAlphaAndPickMask) { @@ -1656,26 +1653,91 @@ void LLImageGL::analyzeAlpha(const void* data_in, S32 w, S32 h) } U32 length = w * h; - const GLubyte* current = ((const GLubyte*) data_in) + mAlphaOffset ; + U32 alphatotal = 0; - S32 sample[16]; - memset(sample, 0, sizeof(S32)*16); - - for (U32 i = 0; i < length; i++) + U32 sample[16]; + memset(sample, 0, sizeof(U32)*16); + + // generate histogram of quantized alpha. + // also add-in the histogram of a 2x2 box-sampled version. The idea is + // this will mid-skew the data (and thus increase the chances of not + // being used as a mask) from high-frequency alpha maps which + // suffer the worst from aliasing when used as alpha masks. + if (w >= 2 && h >= 2) + { + llassert(w%2 == 0); + llassert(h%2 == 0); + const GLubyte* rowstart = ((const GLubyte*) data_in) + mAlphaOffset; + for (U32 y = 0; y < h; y+=2) + { + const GLubyte* current = rowstart; + for (U32 x = 0; x < w; x+=2) + { + const U32 s1 = current[0]; + alphatotal += s1; + const U32 s2 = current[w * mAlphaStride]; + alphatotal += s2; + current += mAlphaStride; + const U32 s3 = current[0]; + alphatotal += s3; + const U32 s4 = current[w * mAlphaStride]; + alphatotal += s4; + current += mAlphaStride; + + ++sample[s1/16]; + ++sample[s2/16]; + ++sample[s3/16]; + ++sample[s4/16]; + + const U32 asum = (s1+s2+s3+s4); + alphatotal += asum; + sample[asum/(16*4)] += 4; + } + + rowstart += 2 * w * mAlphaStride; + } + length *= 2; // we sampled everything twice, essentially + } + else { - ++sample[*current/16]; - current += mAlphaStride ; + const GLubyte* current = ((const GLubyte*) data_in) + mAlphaOffset; + for (U32 i = 0; i < length; i++) + { + const U32 s1 = *current; + alphatotal += s1; + ++sample[s1/16]; + current += mAlphaStride; + } } + + // if more than 1/16th of alpha samples are mid-range, this + // shouldn't be treated as a 1-bit mask - U32 total = 0; + // also, if all of the alpha samples are clumped on one half + // of the range (but not at an absolute extreme), then consider + // this to be an intentional effect and don't treat as a mask. + + U32 midrangetotal = 0; for (U32 i = 4; i < 11; i++) { - total += sample[i]; + midrangetotal += sample[i]; + } + U32 lowerhalftotal = 0; + for (U32 i = 0; i < 8; i++) + { + lowerhalftotal += sample[i]; + } + U32 upperhalftotal = 0; + for (U32 i = 8; i < 16; i++) + { + upperhalftotal += sample[i]; } - if (total > length/16) + if (midrangetotal > length/16 || // lots of midrange, or + (lowerhalftotal == length && alphatotal != 0) || // all close to transparent but not all totally transparent, or + (upperhalftotal == length && alphatotal != 255*length)) // all close to opaque but not all totally opaque { - mIsMask = FALSE; + mIsMask = FALSE; // not suitable for masking } else { @@ -1751,8 +1813,7 @@ BOOL LLImageGL::getMask(const LLVector2 &tc) { LL_WARNS_ONCE("render") << "Ugh, non-finite u/v in mask pick" << LL_ENDL; u = v = 0.f; - // removing assert per EXT-4388 - // llassert(false); + llassert(false); } if (LL_UNLIKELY(u < 0.f || u > 1.f || @@ -1760,8 +1821,7 @@ BOOL LLImageGL::getMask(const LLVector2 &tc) { LL_WARNS_ONCE("render") << "Ugh, u/v out of range in image mask pick" << LL_ENDL; u = v = 0.f; - // removing assert per EXT-4388 - // llassert(false); + llassert(false); } S32 x = llfloor(u * mPickMaskWidth); |