phoenix-firestorm/indra/llrender/llrender.cpp

705 lines
17 KiB
C++

/**
* @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);
}