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Diffstat (limited to 'indra/llrender/llrender.cpp')
| -rw-r--r-- | indra/llrender/llrender.cpp | 704 |
1 files changed, 704 insertions, 0 deletions
diff --git a/indra/llrender/llrender.cpp b/indra/llrender/llrender.cpp new file mode 100644 index 0000000000..1168155f8b --- /dev/null +++ b/indra/llrender/llrender.cpp @@ -0,0 +1,704 @@ +/** + * @file llrender.cpp + * @brief LLRender implementation + * + * $LicenseInfo:firstyear=2001&license=viewergpl$ + * + * Copyright (c) 2001-2007, 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 "llrender.h" +#include "llvertexbuffer.h" + +LLRender gGL; + +static const U32 LL_NUM_TEXTURE_LAYERS = 8; + +static GLenum sGLCompareFunc[] = +{ + GL_NEVER, + GL_ALWAYS, + GL_LESS, + GL_LEQUAL, + GL_EQUAL, + GL_NOTEQUAL, + GL_GEQUAL, + GL_GREATER +}; + +const U32 immediate_mask = LLVertexBuffer::MAP_VERTEX | LLVertexBuffer::MAP_COLOR | LLVertexBuffer::MAP_TEXCOORD; + +static GLenum sGLBlendFactor[] = +{ + GL_ONE, + GL_ZERO, + GL_DST_COLOR, + GL_SRC_COLOR, + GL_ONE_MINUS_DST_COLOR, + GL_ONE_MINUS_SRC_COLOR, + GL_DST_ALPHA, + GL_SRC_ALPHA, + GL_ONE_MINUS_DST_ALPHA, + GL_ONE_MINUS_SRC_ALPHA +}; + +LLTexUnit::LLTexUnit(U32 index) +: mIsEnabled(false), mCurrBlendType(TB_MULT), +mCurrColorOp(TBO_MULT), mCurrAlphaOp(TBO_MULT), +mCurrColorSrc1(TBS_TEX_COLOR), mCurrColorSrc2(TBS_PREV_COLOR), +mCurrAlphaSrc1(TBS_TEX_ALPHA), mCurrAlphaSrc2(TBS_PREV_ALPHA), +mCurrColorScale(1), mCurrAlphaScale(1) +{ + llassert_always(index < LL_NUM_TEXTURE_LAYERS); + mIndex = index; +} + +U32 LLTexUnit::getIndex(void) +{ + return mIndex; +} + +void LLTexUnit::enable(void) +{ + if (!mIsEnabled) + { + activate(); + glEnable(GL_TEXTURE_2D); + mIsEnabled = true; + } +} + +void LLTexUnit::disable(void) +{ + if (mIsEnabled) + { + activate(); + glDisable(GL_TEXTURE_2D); + mIsEnabled = false; + } +} + +void LLTexUnit::activate(void) +{ + //if (gGL.mCurrTextureUnitIndex != mIndex) + { + glActiveTextureARB(GL_TEXTURE0_ARB + mIndex); + gGL.mCurrTextureUnitIndex = mIndex; + } +} + +// Useful for debugging that you've manually assigned a texture operation to the correct +// texture unit based on the currently set active texture in opengl. +void LLTexUnit::debugTextureUnit(void) +{ + GLint activeTexture; + glGetIntegerv(GL_ACTIVE_TEXTURE_ARB, &activeTexture); + if ((GL_TEXTURE0_ARB + mIndex) != activeTexture) + { + llerrs << "Incorrect Texture Unit! Expected: " << (activeTexture - GL_TEXTURE0_ARB) << " Actual: " << mIndex << llendl; + } +} + +void LLTexUnit::bindTexture(const LLImageGL* texture) +{ + if (texture != NULL) + { + activate(); + texture->bind(mIndex); + } +} + +void LLTexUnit::unbindTexture(void) +{ + activate(); + glBindTexture(GL_TEXTURE_2D, 0); +} + +void LLTexUnit::setTextureBlendType(eTextureBlendType type) +{ + // Do nothing if it's already correctly set. + if (mCurrBlendType == type) + { + return; + } + + activate(); + mCurrBlendType = type; + S32 scale_amount = 1; + switch (type) + { + case TB_REPLACE: + glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); + break; + case TB_ADD: + glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD); + break; + case TB_MULT: + glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); + break; + case TB_MULT_X2: + glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); + scale_amount = 2; + break; + case TB_ALPHA_BLEND: + glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL); + break; + case TB_COMBINE: + glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB); + break; + default: + llerrs << "Unknown Texture Blend Type: " << type << llendl; + break; + } + setColorScale(scale_amount); + setAlphaScale(1); +} + +GLint LLTexUnit::getTextureSource(eTextureBlendSrc src) +{ + switch(src) + { + // All four cases should return the same value. + case TBS_PREV_COLOR: + case TBS_PREV_ALPHA: + case TBS_ONE_MINUS_PREV_COLOR: + case TBS_ONE_MINUS_PREV_ALPHA: + return GL_PREVIOUS_ARB; + + // All four cases should return the same value. + case TBS_TEX_COLOR: + case TBS_TEX_ALPHA: + case TBS_ONE_MINUS_TEX_COLOR: + case TBS_ONE_MINUS_TEX_ALPHA: + return GL_TEXTURE; + + // All four cases should return the same value. + case TBS_VERT_COLOR: + case TBS_VERT_ALPHA: + case TBS_ONE_MINUS_VERT_COLOR: + case TBS_ONE_MINUS_VERT_ALPHA: + return GL_PRIMARY_COLOR_ARB; + + // All four cases should return the same value. + case TBS_CONST_COLOR: + case TBS_CONST_ALPHA: + case TBS_ONE_MINUS_CONST_COLOR: + case TBS_ONE_MINUS_CONST_ALPHA: + return GL_CONSTANT_ARB; + + default: + llwarns << "Unknown eTextureBlendSrc: " << src << ". Using Vertex Color instead." << llendl; + return GL_PRIMARY_COLOR_ARB; + } +} + +GLint LLTexUnit::getTextureSourceType(eTextureBlendSrc src, bool isAlpha) +{ + switch(src) + { + // All four cases should return the same value. + case TBS_PREV_COLOR: + case TBS_TEX_COLOR: + case TBS_VERT_COLOR: + case TBS_CONST_COLOR: + return (isAlpha) ? GL_SRC_ALPHA: GL_SRC_COLOR; + + // All four cases should return the same value. + case TBS_PREV_ALPHA: + case TBS_TEX_ALPHA: + case TBS_VERT_ALPHA: + case TBS_CONST_ALPHA: + return GL_SRC_ALPHA; + + // All four cases should return the same value. + case TBS_ONE_MINUS_PREV_COLOR: + case TBS_ONE_MINUS_TEX_COLOR: + case TBS_ONE_MINUS_VERT_COLOR: + case TBS_ONE_MINUS_CONST_COLOR: + return (isAlpha) ? GL_ONE_MINUS_SRC_ALPHA : GL_ONE_MINUS_SRC_COLOR; + + // All four cases should return the same value. + case TBS_ONE_MINUS_PREV_ALPHA: + case TBS_ONE_MINUS_TEX_ALPHA: + case TBS_ONE_MINUS_VERT_ALPHA: + case TBS_ONE_MINUS_CONST_ALPHA: + return GL_ONE_MINUS_SRC_ALPHA; + + default: + llwarns << "Unknown eTextureBlendSrc: " << src << ". Using Source Color or Alpha instead." << llendl; + return (isAlpha) ? GL_SRC_ALPHA: GL_SRC_COLOR; + } +} + +void LLTexUnit::setTextureCombiner(eTextureBlendOp op, eTextureBlendSrc src1, eTextureBlendSrc src2, bool isAlpha) +{ + activate(); + if (mCurrBlendType != TB_COMBINE) + { + mCurrBlendType = TB_COMBINE; + glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB); + } + + // We want an early out, because this function does a LOT of stuff. + if ( (isAlpha && (mCurrAlphaOp == op) && (mCurrAlphaSrc1 == src1) && (mCurrAlphaSrc2 == src2) ) + || (!isAlpha && (mCurrColorOp == op) && (mCurrColorSrc1 == src1) && (mCurrColorSrc2 == src2) )) + { + return; + } + + // Get the gl source enums according to the eTextureBlendSrc sources passed in + GLint source1 = getTextureSource(src1); + GLint source2 = getTextureSource(src2); + // Get the gl operand enums according to the eTextureBlendSrc sources passed in + GLint operand1 = getTextureSourceType(src1, isAlpha); + GLint operand2 = getTextureSourceType(src2, isAlpha); + // Default the scale amount to 1 + S32 scale_amount = 1; + GLenum comb_enum, src0_enum, src1_enum, src2_enum, operand0_enum, operand1_enum, operand2_enum; + + if (isAlpha) + { + // Set enums to ALPHA ones + comb_enum = GL_COMBINE_ALPHA_ARB; + src0_enum = GL_SOURCE0_ALPHA_ARB; + src1_enum = GL_SOURCE1_ALPHA_ARB; + src2_enum = GL_SOURCE2_ALPHA_ARB; + operand0_enum = GL_OPERAND0_ALPHA_ARB; + operand1_enum = GL_OPERAND1_ALPHA_ARB; + operand2_enum = GL_OPERAND2_ALPHA_ARB; + + // cache current combiner + mCurrAlphaOp = op; + mCurrAlphaSrc1 = src1; + mCurrAlphaSrc2 = src2; + } + else + { + // Set enums to ALPHA ones + comb_enum = GL_COMBINE_RGB_ARB; + src0_enum = GL_SOURCE0_RGB_ARB; + src1_enum = GL_SOURCE1_RGB_ARB; + src2_enum = GL_SOURCE2_RGB_ARB; + operand0_enum = GL_OPERAND0_RGB_ARB; + operand1_enum = GL_OPERAND1_RGB_ARB; + operand2_enum = GL_OPERAND2_RGB_ARB; + + // cache current combiner + mCurrColorOp = op; + mCurrColorSrc1 = src1; + mCurrColorSrc2 = src2; + } + + switch(op) + { + case TBO_REPLACE: + // Slightly special syntax (no second sources), just set all and return. + glTexEnvi(GL_TEXTURE_ENV, comb_enum, GL_REPLACE); + glTexEnvi(GL_TEXTURE_ENV, src0_enum, source1); + glTexEnvi(GL_TEXTURE_ENV, operand0_enum, operand1); + (isAlpha) ? setAlphaScale(1) : setColorScale(1); + return; + + case TBO_MULT: + glTexEnvi(GL_TEXTURE_ENV, comb_enum, GL_MODULATE); + break; + + case TBO_MULT_X2: + glTexEnvi(GL_TEXTURE_ENV, comb_enum, GL_MODULATE); + scale_amount = 2; + break; + + case TBO_MULT_X4: + glTexEnvi(GL_TEXTURE_ENV, comb_enum, GL_MODULATE); + scale_amount = 4; + break; + + case TBO_ADD: + glTexEnvi(GL_TEXTURE_ENV, comb_enum, GL_ADD); + break; + + case TBO_ADD_SIGNED: + glTexEnvi(GL_TEXTURE_ENV, comb_enum, GL_ADD_SIGNED_ARB); + break; + + case TBO_SUBTRACT: + glTexEnvi(GL_TEXTURE_ENV, comb_enum, GL_SUBTRACT_ARB); + break; + + case TBO_LERP_VERT_ALPHA: + glTexEnvi(GL_TEXTURE_ENV, comb_enum, GL_INTERPOLATE); + glTexEnvi(GL_TEXTURE_ENV, src2_enum, GL_PRIMARY_COLOR_ARB); + glTexEnvi(GL_TEXTURE_ENV, operand2_enum, GL_SRC_ALPHA); + break; + + case TBO_LERP_TEX_ALPHA: + glTexEnvi(GL_TEXTURE_ENV, comb_enum, GL_INTERPOLATE); + glTexEnvi(GL_TEXTURE_ENV, src2_enum, GL_TEXTURE); + glTexEnvi(GL_TEXTURE_ENV, operand2_enum, GL_SRC_ALPHA); + break; + + case TBO_LERP_PREV_ALPHA: + glTexEnvi(GL_TEXTURE_ENV, comb_enum, GL_INTERPOLATE); + glTexEnvi(GL_TEXTURE_ENV, src2_enum, GL_PREVIOUS_ARB); + glTexEnvi(GL_TEXTURE_ENV, operand2_enum, GL_SRC_ALPHA); + break; + + case TBO_LERP_CONST_ALPHA: + glTexEnvi(GL_TEXTURE_ENV, comb_enum, GL_INTERPOLATE); + glTexEnvi(GL_TEXTURE_ENV, src2_enum, GL_CONSTANT_ARB); + glTexEnvi(GL_TEXTURE_ENV, operand2_enum, GL_SRC_ALPHA); + break; + + case TBO_LERP_VERT_COLOR: + glTexEnvi(GL_TEXTURE_ENV, comb_enum, GL_INTERPOLATE); + glTexEnvi(GL_TEXTURE_ENV, src2_enum, GL_PRIMARY_COLOR_ARB); + glTexEnvi(GL_TEXTURE_ENV, operand2_enum, (isAlpha) ? GL_SRC_ALPHA : GL_SRC_COLOR); + break; + + default: + llwarns << "Unknown eTextureBlendOp: " << op << ". Setting op to replace." << llendl; + // Slightly special syntax (no second sources), just set all and return. + glTexEnvi(GL_TEXTURE_ENV, comb_enum, GL_REPLACE); + glTexEnvi(GL_TEXTURE_ENV, src0_enum, source1); + glTexEnvi(GL_TEXTURE_ENV, operand0_enum, operand1); + (isAlpha) ? setAlphaScale(1) : setColorScale(1); + return; + } + + // Set sources, operands, and scale accordingly + glTexEnvi(GL_TEXTURE_ENV, src0_enum, source1); + glTexEnvi(GL_TEXTURE_ENV, operand0_enum, operand1); + glTexEnvi(GL_TEXTURE_ENV, src1_enum, source2); + glTexEnvi(GL_TEXTURE_ENV, operand1_enum, operand2); + (isAlpha) ? setAlphaScale(scale_amount) : setColorScale(scale_amount); +} + +void LLTexUnit::setColorScale(S32 scale) +{ + if (mCurrColorScale != scale) + { + mCurrColorScale = scale; + glTexEnvi( GL_TEXTURE_ENV, GL_RGB_SCALE, scale ); + } +} + +void LLTexUnit::setAlphaScale(S32 scale) +{ + if (mCurrAlphaScale != scale) + { + mCurrAlphaScale = scale; + glTexEnvi( GL_TEXTURE_ENV, GL_ALPHA_SCALE, scale ); + } +} + +LLRender::LLRender() +{ + mCount = 0; + mMode = LLVertexBuffer::TRIANGLES; + mBuffer = new LLVertexBuffer(immediate_mask, 0); + mBuffer->allocateBuffer(4096, 0, TRUE); + mBuffer->getVertexStrider(mVerticesp); + mBuffer->getTexCoordStrider(mTexcoordsp); + mBuffer->getColorStrider(mColorsp); + + for (unsigned int i = 0; i < LL_NUM_TEXTURE_LAYERS; i++) + { + mTexUnits.push_back(new LLTexUnit(i)); + } +} + +LLRender::~LLRender() +{ + for (U32 i = 0; i < mTexUnits.size(); i++) + { + delete mTexUnits[i]; + } +} + +void LLRender::translatef(const GLfloat& x, const GLfloat& y, const GLfloat& z) +{ + flush(); + glTranslatef(x,y,z); +} + +void LLRender::pushMatrix() +{ + flush(); + glPushMatrix(); +} + +void LLRender::popMatrix() +{ + flush(); + glPopMatrix(); +} + +void LLRender::setColorMask(bool writeColor, bool writeAlpha) +{ + setColorMask(writeColor, writeColor, writeColor, writeAlpha); +} + +void LLRender::setColorMask(bool writeColorR, bool writeColorG, bool writeColorB, bool writeAlpha) +{ + flush(); + glColorMask(writeColorR, writeColorG, writeColorB, writeAlpha); +} + +void LLRender::setSceneBlendType(eBlendType type) +{ + flush(); + switch (type) + { + case BT_ALPHA: + glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); + break; + case BT_ADD: + glBlendFunc(GL_ONE, GL_ONE); + break; + case BT_ADD_WITH_ALPHA: + glBlendFunc(GL_SRC_ALPHA, GL_ONE); + break; + case BT_MULT: + glBlendFunc(GL_DST_COLOR, GL_ZERO); + break; + case BT_MULT_X2: + glBlendFunc(GL_DST_COLOR, GL_SRC_COLOR); + break; + case BT_REPLACE: + glBlendFunc(GL_ONE, GL_ZERO); + break; + default: + llerrs << "Unknown Scene Blend Type: " << type << llendl; + break; + } +} + +void LLRender::setAlphaRejectSettings(eCompareFunc func, F32 value) +{ + flush(); + if (func == CF_DEFAULT) + { + glAlphaFunc(GL_GREATER, 0.01f); + } + else + { + glAlphaFunc(sGLCompareFunc[func], value); + } +} + +void LLRender::blendFunc(eBlendFactor sfactor, eBlendFactor dfactor) +{ + flush(); + glBlendFunc(sGLBlendFactor[sfactor], sGLBlendFactor[dfactor]); +} + +LLTexUnit* LLRender::getTexUnit(U32 index) +{ + if (index < mTexUnits.size()) + { + return mTexUnits[index]; + } + llerrs << "Non-existing texture unit layer requested: " << index << llendl; + return NULL; +} + +void LLRender::begin(const GLuint& mode) +{ + if (mode != mMode) + { + if (mMode == LLVertexBuffer::QUADS || + mMode == LLVertexBuffer::LINES || + mMode == LLVertexBuffer::TRIANGLES || + mMode == LLVertexBuffer::POINTS) + { + flush(); + } + else if (mCount != 0) + { + llerrs << "gGL.begin() called redundantly." << llendl; + } + + mMode = mode; + } +} + +void LLRender::end() +{ + if (mCount == 0) + { + return; + //IMM_ERRS << "GL begin and end called with no vertices specified." << llendl; + } + + if ((mMode != LLVertexBuffer::QUADS && + mMode != LLVertexBuffer::LINES && + mMode != LLVertexBuffer::TRIANGLES && + mMode != LLVertexBuffer::POINTS) || + mCount > 2048) + { + flush(); + } +} +void LLRender::flush() +{ + if (mCount > 0) + { +#if 0 + if (!glIsEnabled(GL_VERTEX_ARRAY)) + { + llerrs << "foo 1" << llendl; + } + + if (!glIsEnabled(GL_COLOR_ARRAY)) + { + llerrs << "foo 2" << llendl; + } + + if (!glIsEnabled(GL_TEXTURE_COORD_ARRAY)) + { + llerrs << "foo 3" << llendl; + } + + if (glIsEnabled(GL_NORMAL_ARRAY)) + { + llerrs << "foo 7" << llendl; + } + + GLvoid* pointer; + + glGetPointerv(GL_VERTEX_ARRAY_POINTER, &pointer); + if (pointer != &(mBuffer[0].v)) + { + llerrs << "foo 4" << llendl; + } + + glGetPointerv(GL_COLOR_ARRAY_POINTER, &pointer); + if (pointer != &(mBuffer[0].c)) + { + llerrs << "foo 5" << llendl; + } + + glGetPointerv(GL_TEXTURE_COORD_ARRAY_POINTER, &pointer); + if (pointer != &(mBuffer[0].uv)) + { + llerrs << "foo 6" << llendl; + } +#endif + + mBuffer->setBuffer(immediate_mask); + mBuffer->drawArrays(mMode, 0, mCount); + + mVerticesp[0] = mVerticesp[mCount]; + mTexcoordsp[0] = mTexcoordsp[mCount]; + mColorsp[0] = mColorsp[mCount]; + mCount = 0; + } +} +void LLRender::vertex3f(const GLfloat& x, const GLfloat& y, const GLfloat& z) +{ + if (mCount >= 4096) + { + // llwarns << "GL immediate mode overflow. Some geometry not drawn." << llendl; + return; + } + + mVerticesp[mCount] = LLVector3(x,y,z); + mCount++; + if (mCount < 4096) + { + mVerticesp[mCount] = mVerticesp[mCount-1]; + mColorsp[mCount] = mColorsp[mCount-1]; + mTexcoordsp[mCount] = mTexcoordsp[mCount-1]; + } +} +void LLRender::vertex2i(const GLint& x, const GLint& y) +{ + vertex3f((GLfloat) x, (GLfloat) y, 0); +} + +void LLRender::vertex2f(const GLfloat& x, const GLfloat& y) +{ + vertex3f(x,y,0); +} + +void LLRender::vertex2fv(const GLfloat* v) +{ + vertex3f(v[0], v[1], 0); +} + +void LLRender::vertex3fv(const GLfloat* v) +{ + vertex3f(v[0], v[1], v[2]); +} + +void LLRender::texCoord2f(const GLfloat& x, const GLfloat& y) +{ + mTexcoordsp[mCount] = LLVector2(x,y); +} + +void LLRender::texCoord2i(const GLint& x, const GLint& y) +{ + texCoord2f((GLfloat) x, (GLfloat) y); +} + +void LLRender::texCoord2fv(const GLfloat* tc) +{ + texCoord2f(tc[0], tc[1]); +} + +void LLRender::color4ub(const GLubyte& r, const GLubyte& g, const GLubyte& b, const GLubyte& a) +{ + mColorsp[mCount] = LLColor4U(r,g,b,a); +} +void LLRender::color4ubv(const GLubyte* c) +{ + color4ub(c[0], c[1], c[2], c[3]); +} + +void LLRender::color4f(const GLfloat& r, const GLfloat& g, const GLfloat& b, const GLfloat& a) +{ + color4ub((GLubyte) (llclamp(r, 0.f, 1.f)*255), + (GLubyte) (llclamp(g, 0.f, 1.f)*255), + (GLubyte) (llclamp(b, 0.f, 1.f)*255), + (GLubyte) (llclamp(a, 0.f, 1.f)*255)); +} + +void LLRender::color4fv(const GLfloat* c) +{ + color4f(c[0],c[1],c[2],c[3]); +} + +void LLRender::color3f(const GLfloat& r, const GLfloat& g, const GLfloat& b) +{ + color4f(r,g,b,1); +} + +void LLRender::color3fv(const GLfloat* c) +{ + color4f(c[0],c[1],c[2],1); +} + |