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// Geometric Tools, LLC
// Copyright (c) 1998-2014
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
// http://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
//
// File Version: 5.0.1 (2010/04/14)
#include "Wm5GraphicsPCH.h"
#include "Wm5OpenGLRendererData.h"
#include "Wm5OpenGLMapping.h"
using namespace Wm5;
#ifndef WM5_USE_TEXT_DISPLAY_LIST
//----------------------------------------------------------------------------
// Support for non-display-list fonts.
//----------------------------------------------------------------------------
void RendererData::DrawCharacter (const BitmapFont& font, char c)
{
const BitmapFontChar* bfc = font.mCharacters[(unsigned int)c];
// Save unpack state.
GLint swapBytes, lsbFirst, rowLength, skipRows, skipPixels, alignment;
glGetIntegerv(GL_UNPACK_SWAP_BYTES, &swapBytes);
glGetIntegerv(GL_UNPACK_LSB_FIRST, &lsbFirst);
glGetIntegerv(GL_UNPACK_ROW_LENGTH, &rowLength);
glGetIntegerv(GL_UNPACK_SKIP_ROWS, &skipRows);
glGetIntegerv(GL_UNPACK_SKIP_PIXELS, &skipPixels);
glGetIntegerv(GL_UNPACK_ALIGNMENT, &alignment);
glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
glPixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glBitmap(bfc->mXSize, bfc->mYSize, (float)bfc->mXOrigin,
(float)bfc->mYOrigin, (float)bfc->mXSize, 0.0f,
(const GLubyte*)bfc->mBitmap);
// Restore unpack state.
glPixelStorei(GL_UNPACK_SWAP_BYTES, swapBytes);
glPixelStorei(GL_UNPACK_LSB_FIRST, lsbFirst);
glPixelStorei(GL_UNPACK_ROW_LENGTH, rowLength);
glPixelStorei(GL_UNPACK_SKIP_ROWS, skipRows);
glPixelStorei(GL_UNPACK_SKIP_PIXELS, skipPixels);
glPixelStorei(GL_UNPACK_ALIGNMENT, alignment);
}
//----------------------------------------------------------------------------
#endif
//----------------------------------------------------------------------------
// Render state information to avoid redundant state changes.
//----------------------------------------------------------------------------
RendererData::RenderState::RenderState ()
{
// Initialization must be deferred until an OpenGL context has been
// created.
}
//----------------------------------------------------------------------------
void RendererData::RenderState::Initialize (const AlphaState* astate,
const CullState* cstate, const DepthState* dstate,
const OffsetState* ostate, const StencilState* sstate,
const WireState* wstate)
{
// AlphaState
mAlphaBlendEnabled = astate->BlendEnabled;
mAlphaSrcBlend = gOGLAlphaSrcBlend[astate->SrcBlend];
mAlphaDstBlend = gOGLAlphaDstBlend[astate->DstBlend];
mAlphaCompareEnabled = astate->CompareEnabled;
mCompareFunction = gOGLAlphaCompare[astate->Compare];
mAlphaReference = astate->Reference;
mBlendColor = astate->ConstantColor;
mAlphaBlendEnabled ? glEnable(GL_BLEND) : glDisable(GL_BLEND);
glBlendFunc(mAlphaSrcBlend, GL_ONE_MINUS_SRC_ALPHA);
mAlphaCompareEnabled ? glEnable(GL_ALPHA_TEST) : glDisable(GL_ALPHA_TEST);
glAlphaFunc(mCompareFunction, mAlphaReference);
glBlendColor(mBlendColor[0], mBlendColor[1], mBlendColor[2],
mBlendColor[3]);
// CullState
mCullEnabled = cstate->Enabled;
mCCWOrder = cstate->CCWOrder;
mCullEnabled ? glEnable(GL_CULL_FACE) : glDisable(GL_CULL_FACE);
glFrontFace(GL_CCW);
glCullFace(mCCWOrder ? GL_BACK : GL_FRONT);
// DepthState
mDepthEnabled = dstate->Enabled;
mDepthWriteEnabled = dstate->Writable;
mDepthCompareFunction = gOGLDepthCompare[dstate->Compare];
mDepthEnabled ? glEnable(GL_DEPTH_TEST) : glDisable(GL_DEPTH_TEST);
glDepthMask(mDepthWriteEnabled ? GL_TRUE : GL_FALSE);
glDepthFunc(mDepthCompareFunction);
// OffsetState
mFillEnabled = ostate->FillEnabled;
mLineEnabled = ostate->LineEnabled;
mPointEnabled = ostate->PointEnabled;
mOffsetScale = ostate->Scale;
mOffsetBias = ostate->Bias;
mFillEnabled ? glEnable(GL_POLYGON_OFFSET_FILL) :
glDisable(GL_POLYGON_OFFSET_FILL);
mLineEnabled ? glEnable(GL_POLYGON_OFFSET_LINE) :
glDisable(GL_POLYGON_OFFSET_LINE);
mPointEnabled ? glEnable(GL_POLYGON_OFFSET_POINT) :
glDisable(GL_POLYGON_OFFSET_POINT);
glPolygonOffset(mOffsetScale, mOffsetBias);
// StencilState
mStencilEnabled = sstate->Enabled;
mStencilCompareFunction = gOGLStencilCompare[sstate->Compare];
mStencilReference = sstate->Reference;
mStencilMask = sstate->Mask;
mStencilWriteMask = sstate->WriteMask;
mStencilOnFail = gOGLStencilOperation[sstate->OnFail];
mStencilOnZFail = gOGLStencilOperation[sstate->OnZFail];
mStencilOnZPass = gOGLStencilOperation[sstate->OnZPass];
mStencilEnabled ? glEnable(GL_STENCIL_TEST) : glDisable(GL_STENCIL_TEST);
glStencilFunc(mStencilCompareFunction, mStencilReference, mStencilMask);
glStencilMask(mStencilWriteMask);
glStencilOp(mStencilOnFail, mStencilOnZFail, mStencilOnZPass);
// WireState
mWireEnabled = wstate->Enabled;
glPolygonMode(GL_FRONT_AND_BACK, mWireEnabled ? GL_LINE : GL_FILL);
}
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
// Sampler state information to avoid redundant state changes.
//----------------------------------------------------------------------------
RendererData::SamplerState::SamplerState ()
:
mBorderColor(0.0f, 0.0f, 0.0f, 0.0f)
{
mAnisotropy = 1.0f;
mLodBias = 0.0f;
mMagFilter = GL_LINEAR;
mMinFilter = GL_NEAREST_MIPMAP_LINEAR;
mWrap[0] = GL_REPEAT;
mWrap[1] = GL_REPEAT;
mWrap[2] = GL_REPEAT;
}
//----------------------------------------------------------------------------
void RendererData::SamplerState::GetCurrent (GLenum target)
{
glGetTexParameterfv(target, GL_TEXTURE_MAX_ANISOTROPY_EXT, &mAnisotropy);
glGetTexEnvfv(GL_TEXTURE_FILTER_CONTROL, GL_TEXTURE_LOD_BIAS, &mLodBias);
glGetTexParameteriv(target, GL_TEXTURE_MAG_FILTER, &mMagFilter);
glGetTexParameteriv(target, GL_TEXTURE_MIN_FILTER, &mMinFilter);
glGetTexParameterfv(target, GL_TEXTURE_BORDER_COLOR, mBorderColor);
glGetTexParameteriv(target, GL_TEXTURE_WRAP_S, &mWrap[0]);
glGetTexParameteriv(target, GL_TEXTURE_WRAP_T, &mWrap[1]);
glGetTexParameteriv(target, GL_TEXTURE_WRAP_R, &mWrap[2]);
}
//----------------------------------------------------------------------------
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