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Diffstat (limited to 'indra/llrender/llcubemap.cpp')
| -rw-r--r-- | indra/llrender/llcubemap.cpp | 532 |
1 files changed, 532 insertions, 0 deletions
diff --git a/indra/llrender/llcubemap.cpp b/indra/llrender/llcubemap.cpp new file mode 100644 index 0000000000..f19992eeab --- /dev/null +++ b/indra/llrender/llcubemap.cpp @@ -0,0 +1,532 @@ +/** + * @file llcubemap.cpp + * @brief LLCubeMap class implementation + * + * $LicenseInfo:firstyear=2002&license=viewergpl$ + * + * Copyright (c) 2002-2007, 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://secondlife.com/developers/opensource/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://secondlife.com/developers/opensource/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. + * $/LicenseInfo$ + */ +#include "linden_common.h" + +#include "llworkerthread.h" + +#include "llcubemap.h" + +#include "v4coloru.h" +#include "v3math.h" +#include "v3dmath.h" +#include "m3math.h" +#include "m4math.h" +#include "llcamera.h" + +#include "llrender.h" + +#include "llglheaders.h" + +const F32 epsilon = 1e-7f; +const U16 RESOLUTION = 64; + +#if LL_DARWIN +// mipmap generation on cubemap textures seems to be broken on the Mac for at least some cards. +// Since the cubemap is small (64x64 per face) and doesn't have any fine detail, turning off mipmaps is a usable workaround. +const BOOL use_cube_mipmaps = FALSE; +#else +const BOOL use_cube_mipmaps = FALSE; //current build works best without cube mipmaps +#endif + +bool LLCubeMap::sUseCubeMaps = true; + +LLCubeMap::LLCubeMap() + : mTextureStage(0), + mTextureCoordStage(0), + mMatrixStage(0) +{ +} + +LLCubeMap::~LLCubeMap() +{ +} + +void LLCubeMap::initGL() +{ + llassert(gGLManager.mInited); + + if (gGLManager.mHasCubeMap && LLCubeMap::sUseCubeMaps) + { + mTargets[0] = GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB; + mTargets[1] = GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB; + mTargets[2] = GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB; + mTargets[3] = GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB; + mTargets[4] = GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB; + mTargets[5] = GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB; + + // Not initialized, do stuff. + if (mImages[0].isNull()) + { + GLuint texname = 0; + + glGenTextures(1, &texname); + + for (int i = 0; i < 6; i++) + { + mImages[i] = new LLImageGL(64, 64, 4, (use_cube_mipmaps? TRUE : FALSE)); + mImages[i]->setTarget(mTargets[i], GL_TEXTURE_CUBE_MAP_ARB); + mRawImages[i] = new LLImageRaw(64, 64, 4); + mImages[i]->createGLTexture(0, mRawImages[i], texname); + + glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, texname); + mImages[i]->setClampCubemap (TRUE, TRUE, TRUE); + stop_glerror(); + } + } + disable(); + } + else + { + llwarns << "Using cube map without extension!" << llendl + } +} + +void LLCubeMap::initRawData(const std::vector<LLPointer<LLImageRaw> >& rawimages) +{ + bool flip_x[6] = { false, true, false, false, true, false }; + bool flip_y[6] = { true, true, true, false, true, true }; + bool transpose[6] = { false, false, false, false, true, true }; + + // Yes, I know that this is inefficient! - djs 08/08/02 + for (int i = 0; i < 6; i++) + { + const U8 *sd = rawimages[i]->getData(); + U8 *td = mRawImages[i]->getData(); + + S32 offset = 0; + S32 sx, sy, so; + for (int y = 0; y < 64; y++) + { + for (int x = 0; x < 64; x++) + { + sx = x; + sy = y; + if (flip_y[i]) + { + sy = 63 - y; + } + if (flip_x[i]) + { + sx = 63 - x; + } + if (transpose[i]) + { + S32 temp = sx; + sx = sy; + sy = temp; + } + + so = 64*sy + sx; + so *= 4; + *(td + offset++) = *(sd + so++); + *(td + offset++) = *(sd + so++); + *(td + offset++) = *(sd + so++); + *(td + offset++) = *(sd + so++); + } + } + } +} + +void LLCubeMap::initGLData() +{ + for (int i = 0; i < 6; i++) + { + mImages[i]->setSubImage(mRawImages[i], 0, 0, 64, 64); + } +} + +void LLCubeMap::init(const std::vector<LLPointer<LLImageRaw> >& rawimages) +{ + if (!gGLManager.mIsDisabled) + { + initGL(); + initRawData(rawimages); + initGLData(); + } +} + +GLuint LLCubeMap::getGLName() +{ + return mImages[0]->getTexName(); +} + +void LLCubeMap::bind() +{ + if (gGLManager.mHasCubeMap && LLCubeMap::sUseCubeMaps) + { + // We assume that if they have cube mapping, they have multitexturing. + if (mTextureStage > 0) + { + gGL.getTexUnit(mTextureStage)->activate(); + } + glEnable(GL_TEXTURE_CUBE_MAP_ARB); + glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, mImages[0]->getTexName()); + + mImages[0]->setMipFilterNearest (FALSE, FALSE); + if (mTextureStage > 0) + { + gGL.getTexUnit(0)->activate(); + } + } + else + { + llwarns << "Using cube map without extension!" << llendl + } +} + +void LLCubeMap::enable(S32 stage) +{ + enableTexture(stage); + enableTextureCoords(stage); +} + +void LLCubeMap::enableTexture(S32 stage) +{ + mTextureStage = stage; + if (gGLManager.mHasCubeMap && stage >= 0 && LLCubeMap::sUseCubeMaps) + { + if (stage > 0) + { + gGL.getTexUnit(stage)->activate(); + } + + glEnable(GL_TEXTURE_CUBE_MAP_ARB); + + if (stage > 0) + { + gGL.getTexUnit(0)->activate(); + } + } +} + +void LLCubeMap::enableTextureCoords(S32 stage) +{ + mTextureCoordStage = stage; + if (gGLManager.mHasCubeMap && stage >= 0 && LLCubeMap::sUseCubeMaps) + { + if (stage > 0) + { + gGL.getTexUnit(stage)->activate(); + } + + glEnable(GL_TEXTURE_GEN_R); + glEnable(GL_TEXTURE_GEN_S); + glEnable(GL_TEXTURE_GEN_T); + + glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP); + glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP); + glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP); + + if (stage > 0) + { + gGL.getTexUnit(0)->activate(); + } + } +} + +void LLCubeMap::disable(void) +{ + disableTexture(); + disableTextureCoords(); +} + +void LLCubeMap::disableTexture(void) +{ + if (gGLManager.mHasCubeMap && mTextureStage >= 0 && LLCubeMap::sUseCubeMaps) + { + if (mTextureStage > 0) + { + gGL.getTexUnit(mTextureStage)->activate(); + } + glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, 0); + glDisable(GL_TEXTURE_CUBE_MAP_ARB); + if (mTextureStage > 0) + { + gGL.getTexUnit(0)->activate(); + } + } +} + +void LLCubeMap::disableTextureCoords(void) +{ + if (gGLManager.mHasCubeMap && mTextureCoordStage >= 0 && LLCubeMap::sUseCubeMaps) + { + if (mTextureCoordStage > 0) + { + gGL.getTexUnit(mTextureCoordStage)->activate(); + } + glDisable(GL_TEXTURE_GEN_S); + glDisable(GL_TEXTURE_GEN_T); + glDisable(GL_TEXTURE_GEN_R); + if (mTextureCoordStage > 0) + { + gGL.getTexUnit(0)->activate(); + } + } +} + +void LLCubeMap::setMatrix(S32 stage) +{ + mMatrixStage = stage; + + if (stage > 0) + { + gGL.getTexUnit(stage)->activate(); + } + + LLVector3 x(LLVector3d(gGLModelView+0)); + LLVector3 y(LLVector3d(gGLModelView+4)); + LLVector3 z(LLVector3d(gGLModelView+8)); + + LLMatrix3 mat3; + mat3.setRows(x,y,z); + LLMatrix4 trans(mat3); + trans.transpose(); + + glMatrixMode(GL_TEXTURE); + glPushMatrix(); + glLoadMatrixf((F32 *)trans.mMatrix); + glMatrixMode(GL_MODELVIEW); + + if (stage > 0) + { + gGL.getTexUnit(0)->activate(); + } +} + +void LLCubeMap::restoreMatrix() +{ + if (mMatrixStage > 0) + { + gGL.getTexUnit(mMatrixStage)->activate(); + } + glMatrixMode(GL_TEXTURE); + glPopMatrix(); + glMatrixMode(GL_MODELVIEW); + + if (mMatrixStage > 0) + { + gGL.getTexUnit(0)->activate(); + } +} + +void LLCubeMap::setReflection (void) +{ + glBindTexture (GL_TEXTURE_CUBE_MAP_ARB, getGLName()); + mImages[0]->setMipFilterNearest (FALSE, FALSE); + mImages[0]->setClampCubemap (TRUE, TRUE); +} + +LLVector3 LLCubeMap::map(U8 side, U16 v_val, U16 h_val) const +{ + LLVector3 dir; + + const U8 curr_coef = side >> 1; // 0/1 = X axis, 2/3 = Y, 4/5 = Z + const S8 side_dir = (((side & 1) << 1) - 1); // even = -1, odd = 1 + const U8 i_coef = (curr_coef + 1) % 3; + const U8 j_coef = (i_coef + 1) % 3; + + dir.mV[curr_coef] = side_dir; + + switch (side) + { + case 0: // negative X + dir.mV[i_coef] = -F32((v_val<<1) + 1) / RESOLUTION + 1; + dir.mV[j_coef] = F32((h_val<<1) + 1) / RESOLUTION - 1; + break; + case 1: // positive X + dir.mV[i_coef] = -F32((v_val<<1) + 1) / RESOLUTION + 1; + dir.mV[j_coef] = -F32((h_val<<1) + 1) / RESOLUTION + 1; + break; + case 2: // negative Y + dir.mV[i_coef] = -F32((v_val<<1) + 1) / RESOLUTION + 1; + dir.mV[j_coef] = F32((h_val<<1) + 1) / RESOLUTION - 1; + break; + case 3: // positive Y + dir.mV[i_coef] = F32((v_val<<1) + 1) / RESOLUTION - 1; + dir.mV[j_coef] = F32((h_val<<1) + 1) / RESOLUTION - 1; + break; + case 4: // negative Z + dir.mV[i_coef] = -F32((h_val<<1) + 1) / RESOLUTION + 1; + dir.mV[j_coef] = -F32((v_val<<1) + 1) / RESOLUTION + 1; + break; + case 5: // positive Z + dir.mV[i_coef] = -F32((h_val<<1) + 1) / RESOLUTION + 1; + dir.mV[j_coef] = F32((v_val<<1) + 1) / RESOLUTION - 1; + break; + default: + dir.mV[i_coef] = F32((v_val<<1) + 1) / RESOLUTION - 1; + dir.mV[j_coef] = F32((h_val<<1) + 1) / RESOLUTION - 1; + } + + dir.normVec(); + return dir; +} + + +BOOL LLCubeMap::project(F32& v_val, F32& h_val, BOOL& outside, + U8 side, const LLVector3& dir) const +{ + const U8 curr_coef = side >> 1; // 0/1 = X axis, 2/3 = Y, 4/5 = Z + const S8 side_dir = (((side & 1) << 1) - 1); // even = -1, odd = 1 + const U8 i_coef = (curr_coef + 1) % 3; + const U8 j_coef = (i_coef + 1) % 3; + + outside = TRUE; + if (side_dir * dir.mV[curr_coef] < 0) + return FALSE; + + LLVector3 ray; + + F32 norm_val = fabs(dir.mV[curr_coef]); + + if (norm_val < epsilon) + norm_val = 1e-5f; + + ray.mV[curr_coef] = side_dir; + ray.mV[i_coef] = dir.mV[i_coef] / norm_val; + ray.mV[j_coef] = dir.mV[j_coef] / norm_val; + + + const F32 i_val = (ray.mV[i_coef] + 1) * 0.5f * RESOLUTION; + const F32 j_val = (ray.mV[j_coef] + 1) * 0.5f * RESOLUTION; + + switch (side) + { + case 0: // negative X + v_val = RESOLUTION - i_val; + h_val = j_val; + break; + case 1: // positive X + v_val = RESOLUTION - i_val; + h_val = RESOLUTION - j_val; + break; + case 2: // negative Y + v_val = RESOLUTION - i_val; + h_val = j_val; + break; + case 3: // positive Y + v_val = i_val; + h_val = j_val; + break; + case 4: // negative Z + v_val = RESOLUTION - j_val; + h_val = RESOLUTION - i_val; + break; + case 5: // positive Z + v_val = RESOLUTION - j_val; + h_val = i_val; + break; + default: + v_val = i_val; + h_val = j_val; + } + + outside = ((v_val < 0) || (v_val > RESOLUTION) || + (h_val < 0) || (h_val > RESOLUTION)); + + return TRUE; +} + +BOOL LLCubeMap::project(F32& v_min, F32& v_max, F32& h_min, F32& h_max, + U8 side, LLVector3 dir[4]) const +{ + v_min = h_min = RESOLUTION; + v_max = h_max = 0; + + BOOL fully_outside = TRUE; + for (U8 vtx = 0; vtx < 4; ++vtx) + { + F32 v_val, h_val; + BOOL outside; + BOOL consider = project(v_val, h_val, outside, side, dir[vtx]); + if (!outside) + fully_outside = FALSE; + if (consider) + { + if (v_val < v_min) v_min = v_val; + if (v_val > v_max) v_max = v_val; + if (h_val < h_min) h_min = h_val; + if (h_val > h_max) h_max = h_val; + } + } + + v_min = llmax(0.0f, v_min); + v_max = llmin(RESOLUTION - epsilon, v_max); + h_min = llmax(0.0f, h_min); + h_max = llmin(RESOLUTION - epsilon, h_max); + + return !fully_outside; +} + + +void LLCubeMap::paintIn(LLVector3 dir[4], const LLColor4U& col) +{ + F32 v_min, v_max, h_min, h_max; + LLVector3 center = dir[0] + dir[1] + dir[2] + dir[3]; + center.normVec(); + + for (U8 side = 0; side < 6; ++side) + { + if (!project(v_min, v_max, h_min, h_max, side, dir)) + continue; + + U8 *td = mRawImages[side]->getData(); + + U16 v_minu = (U16) v_min; + U16 v_maxu = (U16) (ceil(v_max) + 0.5); + U16 h_minu = (U16) h_min; + U16 h_maxu = (U16) (ceil(h_max) + 0.5); + + for (U16 v = v_minu; v < v_maxu; ++v) + for (U16 h = h_minu; h < h_maxu; ++h) + //for (U16 v = 0; v < RESOLUTION; ++v) + // for (U16 h = 0; h < RESOLUTION; ++h) + { + const LLVector3 ray = map(side, v, h); + if (ray * center > 0.999) + { + const U32 offset = (RESOLUTION * v + h) * 4; + for (U8 cc = 0; cc < 3; ++cc) + td[offset + cc] = U8((td[offset + cc] + col.mV[cc]) * 0.5); + } + } + mImages[side]->setSubImage(mRawImages[side], 0, 0, 64, 64); + } +} + +void LLCubeMap::destroyGL() +{ + for (S32 i = 0; i < 6; i++) + { + mImages[i] = NULL; + } +} |