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windows-nt/Source/XPSP1/NT/multimedia/opengl/server/soft/so_pick.c

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2020-09-26 03:20:57 -05:00
/*
** Copyright 1991-1993, Silicon Graphics, Inc.
** All Rights Reserved.
**
** This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics, Inc.;
** the contents of this file may not be disclosed to third parties, copied or
** duplicated in any form, in whole or in part, without the prior written
** permission of Silicon Graphics, Inc.
**
** RESTRICTED RIGHTS LEGEND:
** Use, duplication or disclosure by the Government is subject to restrictions
** as set forth in subdivision (c)(1)(ii) of the Rights in Technical Data
** and Computer Software clause at DFARS 252.227-7013, and/or in similar or
** successor clauses in the FAR, DOD or NASA FAR Supplement. Unpublished -
** rights reserved under the Copyright Laws of the United States.
*/
#include "precomp.h"
#pragma hdrstop
#include "texture.h"
/*
** Determine if the alpha color component is needed. If it's not needed
** then the renderers can avoid computing it.
*/
GLboolean FASTCALL __glNeedAlpha(__GLcontext *gc)
{
if (gc->modes.colorIndexMode) {
return GL_FALSE;
}
if (gc->state.enables.general & __GL_ALPHA_TEST_ENABLE) {
return GL_TRUE;
}
if (gc->modes.alphaBits > 0) {
return GL_TRUE;
}
if (gc->state.enables.general & __GL_BLEND_ENABLE) {
GLint src = gc->state.raster.blendSrc;
GLint dst = gc->state.raster.blendDst;
/*
** See if one of the source alpha combinations are used.
*/
if ((src == GL_SRC_ALPHA) ||
(src == GL_ONE_MINUS_SRC_ALPHA) ||
(src == GL_SRC_ALPHA_SATURATE) ||
(dst == GL_SRC_ALPHA) ||
(dst == GL_ONE_MINUS_SRC_ALPHA)) {
return GL_TRUE;
}
}
return GL_FALSE;
}
/************************************************************************/
/* these are depth test routines for C.. */
GLboolean (FASTCALL *__glCDTPixel[32])(__GLzValue, __GLzValue *) = {
/* unsigned ops, no mask */
__glDT_NEVER,
__glDT_LESS,
__glDT_EQUAL,
__glDT_LEQUAL,
__glDT_GREATER,
__glDT_NOTEQUAL,
__glDT_GEQUAL,
__glDT_ALWAYS,
/* unsigned ops, mask */
__glDT_NEVER,
__glDT_LESS_M,
__glDT_EQUAL_M,
__glDT_LEQUAL_M,
__glDT_GREATER_M,
__glDT_NOTEQUAL_M,
__glDT_GEQUAL_M,
__glDT_ALWAYS_M,
/* unsigned ops, no mask */
__glDT_NEVER,
__glDT16_LESS,
__glDT16_EQUAL,
__glDT16_LEQUAL,
__glDT16_GREATER,
__glDT16_NOTEQUAL,
__glDT16_GEQUAL,
__glDT16_ALWAYS,
/* unsigned ops, mask */
__glDT_NEVER,
__glDT16_LESS_M,
__glDT16_EQUAL_M,
__glDT16_LEQUAL_M,
__glDT16_GREATER_M,
__glDT16_NOTEQUAL_M,
__glDT16_GEQUAL_M,
__glDT16_ALWAYS_M,
};
#ifdef __GL_USEASMCODE
void (*__glSDepthTestPixel[16])(void) = {
NULL,
__glDTS_LESS,
__glDTS_EQUAL,
__glDTS_LEQUAL,
__glDTS_GREATER,
__glDTS_NOTEQUAL,
__glDTS_GEQUAL,
__glDTS_ALWAYS,
NULL,
__glDTS_LESS_M,
__glDTS_EQUAL_M,
__glDTS_LEQUAL_M,
__glDTS_GREATER_M,
__glDTS_NOTEQUAL_M,
__glDTS_GEQUAL_M,
__glDTS_ALWAYS_M,
};
#endif
/************************************************************************/
void FASTCALL __glGenericPickPointProcs(__GLcontext *gc)
{
GLuint modeFlags = gc->polygon.shader.modeFlags;
if (gc->renderMode == GL_FEEDBACK)
{
gc->procs.renderPoint = __glFeedbackPoint;
return;
}
if (gc->renderMode == GL_SELECT)
{
gc->procs.renderPoint = __glSelectPoint;
return;
}
if (gc->state.enables.general & __GL_POINT_SMOOTH_ENABLE)
{
if (gc->modes.colorIndexMode)
{
gc->procs.renderPoint = __glRenderAntiAliasedCIPoint;
}
else
{
gc->procs.renderPoint = __glRenderAntiAliasedRGBPoint;
}
return;
}
else if (gc->state.point.aliasedSize != 1)
{
gc->procs.renderPoint = __glRenderAliasedPointN;
}
else if (gc->texture.textureEnabled)
{
gc->procs.renderPoint = __glRenderAliasedPoint1;
}
else
{
gc->procs.renderPoint = __glRenderAliasedPoint1_NoTex;
}
#ifdef __BUGGY_RENDER_POINT
#ifdef NT
if ((modeFlags & __GL_SHADE_CHEAP_FOG) &&
!(modeFlags & __GL_SHADE_SMOOTH_LIGHT))
{
gc->procs.renderPoint2 = gc->procs.renderPoint;
gc->procs.renderPoint = __glRenderFlatFogPoint;
}
else if (modeFlags & __GL_SHADE_SLOW_FOG)
{
gc->procs.renderPoint2 = gc->procs.renderPoint;
gc->procs.renderPoint = __glRenderFlatFogPointSlow;
}
#else
// SGIBUG the slow fog path does not compute vertex->fog value!
if (((modeFlags & __GL_SHADE_CHEAP_FOG) &&
!(modeFlags & __GL_SHADE_SMOOTH_LIGHT)) ||
(modeFlags & __GL_SHADE_SLOW_FOG)) {
gc->procs.renderPoint2 = gc->procs.renderPoint;
gc->procs.renderPoint = __glRenderFlatFogPoint;
}
#endif
#endif //__BUGGY_RENDER_POINT
}
#ifdef __GL_USEASMCODE
static void (*LDepthTestPixel[16])(void) = {
NULL,
__glDTP_LESS,
__glDTP_EQUAL,
__glDTP_LEQUAL,
__glDTP_GREATER,
__glDTP_NOTEQUAL,
__glDTP_GEQUAL,
__glDTP_ALWAYS,
NULL,
__glDTP_LESS_M,
__glDTP_EQUAL_M,
__glDTP_LEQUAL_M,
__glDTP_GREATER_M,
__glDTP_NOTEQUAL_M,
__glDTP_GEQUAL_M,
__glDTP_ALWAYS_M,
};
#endif
void FASTCALL __glGenericPickRenderBitmapProcs(__GLcontext *gc)
{
gc->procs.renderBitmap = __glRenderBitmap;
}
void FASTCALL __glGenericPickClipProcs(__GLcontext *gc)
{
gc->procs.clipTriangle = __glClipTriangle;
}
void FASTCALL __glGenericPickTextureProcs(__GLcontext *gc)
{
__GLtexture *current;
__GLtextureParamState *params;
#ifdef NT
/* Pick coordinate generation function */
if ((gc->state.enables.general & __GL_TEXTURE_GEN_S_ENABLE) &&
(gc->state.enables.general & __GL_TEXTURE_GEN_T_ENABLE) &&
!(gc->state.enables.general & __GL_TEXTURE_GEN_R_ENABLE) &&
!(gc->state.enables.general & __GL_TEXTURE_GEN_Q_ENABLE) &&
(gc->state.texture.s.mode == gc->state.texture.t.mode))
{
/* Use a special function when both modes are enabled and identical */
if (gc->state.texture.s.mode == GL_SPHERE_MAP)
{
gc->procs.paCalcTexture = PolyArrayCalcSphereMap;
}
else
{
__GLcoord *cs, *ct;
cs = &gc->state.texture.s.eyePlaneEquation;
ct = &gc->state.texture.t.eyePlaneEquation;
if (cs->x == ct->x && cs->y == ct->y
&& cs->z == ct->z && cs->w == ct->w)
{
if (gc->state.texture.s.mode == GL_EYE_LINEAR)
gc->procs.paCalcTexture = PolyArrayCalcEyeLinearSameST;
else
gc->procs.paCalcTexture = PolyArrayCalcObjectLinearSameST;
}
else
{
if (gc->state.texture.s.mode == GL_EYE_LINEAR)
gc->procs.paCalcTexture = PolyArrayCalcEyeLinear;
else
gc->procs.paCalcTexture = PolyArrayCalcObjectLinear;
}
}
}
else
{
if (gc->state.enables.general & (__GL_TEXTURE_GEN_S_ENABLE |
__GL_TEXTURE_GEN_T_ENABLE |
__GL_TEXTURE_GEN_R_ENABLE |
__GL_TEXTURE_GEN_Q_ENABLE))
/* Use fast function when both are disabled */
gc->procs.paCalcTexture = PolyArrayCalcMixedTexture;
else
gc->procs.paCalcTexture = PolyArrayCalcTexture;
}
#else
/* Pick coordinate generation function */
if ((gc->state.enables.general & __GL_TEXTURE_GEN_S_ENABLE) &&
(gc->state.enables.general & __GL_TEXTURE_GEN_T_ENABLE) &&
!(gc->state.enables.general & __GL_TEXTURE_GEN_R_ENABLE) &&
!(gc->state.enables.general & __GL_TEXTURE_GEN_Q_ENABLE) &&
(gc->state.texture.s.mode == gc->state.texture.t.mode)) {
/* Use a special function when both modes are enabled and identical */
switch (gc->state.texture.s.mode) {
case GL_EYE_LINEAR:
gc->procs.calcTexture = __glCalcEyeLinear;
break;
case GL_OBJECT_LINEAR:
gc->procs.calcTexture = __glCalcObjectLinear;
break;
case GL_SPHERE_MAP:
gc->procs.calcTexture = __glCalcSphereMap;
break;
}
} else {
if (!(gc->state.enables.general & __GL_TEXTURE_GEN_S_ENABLE) &&
!(gc->state.enables.general & __GL_TEXTURE_GEN_T_ENABLE) &&
!(gc->state.enables.general & __GL_TEXTURE_GEN_R_ENABLE) &&
!(gc->state.enables.general & __GL_TEXTURE_GEN_Q_ENABLE)) {
/* Use fast function when both are disabled */
gc->procs.calcTexture = __glCalcTexture;
} else {
gc->procs.calcTexture = __glCalcMixedTexture;
}
}
#endif // NT
gc->texture.currentTexture = current = 0;
if (gc->state.enables.general & __GL_TEXTURE_2D_ENABLE) {
if (__glIsTextureConsistent(gc, GL_TEXTURE_2D)) {
params = __glLookUpTextureParams(gc, GL_TEXTURE_2D);
gc->texture.currentTexture =
current = __glLookUpTexture(gc, GL_TEXTURE_2D);
}
} else
if (gc->state.enables.general & __GL_TEXTURE_1D_ENABLE) {
if (__glIsTextureConsistent(gc, GL_TEXTURE_1D)) {
params = __glLookUpTextureParams(gc, GL_TEXTURE_1D);
gc->texture.currentTexture =
current = __glLookUpTexture(gc, GL_TEXTURE_1D);
}
} else {
current = NULL;
}
#ifdef _MCD_
MCD_STATE_DIRTY(gc, TEXTURE);
#endif
/* Pick texturing function for the current texture */
if (current) {
GLenum baseFormat;
/* XXX most of this should be bound into the texture param code, right? */
current->params = *params;
/*
** Figure out if mipmapping is being used. If not, then the
** rho computations can be avoided as there is only one texture
** to choose from.
*/
gc->procs.calcLineRho = __glComputeLineRho;
gc->procs.calcPolygonRho = __glComputePolygonRho;
if ((current->params.minFilter == GL_LINEAR)
|| (current->params.minFilter == GL_NEAREST)) {
/* No mipmapping needed */
if (current->params.minFilter == current->params.magFilter) {
/* No rho needed as min/mag application is identical */
current->textureFunc = __glFastTextureFragment;
gc->procs.calcLineRho = __glNopLineRho;
gc->procs.calcPolygonRho = __glNopPolygonRho;
} else {
current->textureFunc = __glTextureFragment;
/*
** Pre-calculate min/mag switchover point. The rho calculation
** doesn't perform a square root (ever). Consequently, these
** constants are squared.
*/
if ((current->params.magFilter == GL_LINEAR) &&
((current->params.minFilter == GL_NEAREST_MIPMAP_NEAREST) ||
(current->params.minFilter == GL_LINEAR_MIPMAP_NEAREST))) {
current->c = ((__GLfloat) 2.0);
} else {
current->c = __glOne;
}
}
} else {
current->textureFunc = __glMipMapFragment;
/*
** Pre-calculate min/mag switchover point. The rho
** calculation doesn't perform a square root (ever).
** Consequently, these constants are squared.
*/
if ((current->params.magFilter == GL_LINEAR) &&
((current->params.minFilter == GL_NEAREST_MIPMAP_NEAREST) ||
(current->params.minFilter == GL_LINEAR_MIPMAP_NEAREST))) {
current->c = ((__GLfloat) 2.0);
} else {
current->c = __glOne;
}
}
/* Pick environment function */
baseFormat = current->level[0].baseFormat;
switch (gc->state.texture.env[0].mode) {
case GL_MODULATE:
switch (baseFormat) {
case GL_LUMINANCE:
current->env = __glTextureModulateL;
break;
case GL_LUMINANCE_ALPHA:
current->env = __glTextureModulateLA;
break;
case GL_RGB:
current->env = __glTextureModulateRGB;
break;
case GL_RGBA:
current->env = __glTextureModulateRGBA;
break;
case GL_ALPHA:
current->env = __glTextureModulateA;
break;
case GL_INTENSITY:
current->env = __glTextureModulateI;
break;
#ifdef NT
default:
ASSERTOPENGL(FALSE, "Unexpected baseFormat\n");
break;
#endif
}
break;
case GL_DECAL:
switch (baseFormat) {
case GL_LUMINANCE:
current->env = __glNopGCCOLOR;
break;
case GL_LUMINANCE_ALPHA:
current->env = __glNopGCCOLOR;
break;
case GL_RGB:
current->env = __glTextureDecalRGB;
break;
case GL_RGBA:
current->env = __glTextureDecalRGBA;
break;
case GL_ALPHA:
current->env = __glNopGCCOLOR;
break;
case GL_INTENSITY:
current->env = __glNopGCCOLOR;
break;
#ifdef NT
default:
ASSERTOPENGL(FALSE, "Unexpected baseFormat\n");
break;
#endif
}
break;
case GL_BLEND:
switch (baseFormat) {
case GL_LUMINANCE:
current->env = __glTextureBlendL;
break;
case GL_LUMINANCE_ALPHA:
current->env = __glTextureBlendLA;
break;
case GL_RGB:
current->env = __glTextureBlendRGB;
break;
case GL_RGBA:
current->env = __glTextureBlendRGBA;
break;
case GL_ALPHA:
current->env = __glTextureBlendA;
break;
case GL_INTENSITY:
current->env = __glTextureBlendI;
break;
#ifdef NT
default:
ASSERTOPENGL(FALSE, "Unexpected baseFormat\n");
break;
#endif
}
break;
case GL_REPLACE:
switch (baseFormat) {
case GL_LUMINANCE:
current->env = __glTextureReplaceL;
break;
case GL_LUMINANCE_ALPHA:
current->env = __glTextureReplaceLA;
break;
case GL_RGB:
current->env = __glTextureReplaceRGB;
break;
case GL_RGBA:
current->env = __glTextureReplaceRGBA;
break;
case GL_ALPHA:
current->env = __glTextureReplaceA;
break;
case GL_INTENSITY:
current->env = __glTextureReplaceI;
break;
#ifdef NT
default:
ASSERTOPENGL(FALSE, "Unexpected baseFormat\n");
break;
#endif
}
break;
#ifdef NT
default:
ASSERTOPENGL(FALSE, "Unexpected texture mode\n");
break;
#endif
}
/* Pick mag/min functions */
switch (current->dim) {
case 1:
current->nearest = __glNearestFilter1;
current->linear = __glLinearFilter1;
break;
case 2:
current->nearest = __glNearestFilter2;
current->linear = __glLinearFilter2;
// Accelerate BGR{A}8 case when wrap modes are both REPEAT
if( (current->params.sWrapMode == GL_REPEAT) &&
(current->params.tWrapMode == GL_REPEAT)
)
{
__GLmipMapLevel *lp = &current->level[0];
if( lp->extract == __glExtractTexelBGR8 )
current->linear = __glLinearFilter2_BGR8Repeat;
else if( lp->extract == __glExtractTexelBGRA8 )
current->linear = __glLinearFilter2_BGRA8Repeat;
}
break;
}
/* set mag filter function */
switch (current->params.magFilter) {
case GL_LINEAR:
current->magnify = __glLinearFilter;
break;
case GL_NEAREST:
current->magnify = __glNearestFilter;
break;
}
/* set min filter function */
switch (current->params.minFilter) {
case GL_LINEAR:
current->minnify = __glLinearFilter;
break;
case GL_NEAREST:
current->minnify = __glNearestFilter;
break;
case GL_NEAREST_MIPMAP_NEAREST:
current->minnify = __glNMNFilter;
break;
case GL_LINEAR_MIPMAP_NEAREST:
current->minnify = __glLMNFilter;
break;
case GL_NEAREST_MIPMAP_LINEAR:
current->minnify = __glNMLFilter;
break;
case GL_LINEAR_MIPMAP_LINEAR:
current->minnify = __glLMLFilter;
break;
}
gc->procs.texture = current->textureFunc;
} else {
gc->procs.texture = 0;
}
}
void FASTCALL __glGenericPickFogProcs(__GLcontext *gc)
{
#ifdef GL_WIN_specular_fog
/*
** If specular shading is on, coerce the fog sub-system to go through
** DONT_CARE path. Disregard the GL_NICEST hint!!!
*/
#endif //GL_WIN_specular_fog
if ((gc->state.enables.general & __GL_FOG_ENABLE)
#ifdef GL_WIN_specular_fog
|| (gc->polygon.shader.modeFlags & __GL_SHADE_SPEC_FOG)
#endif //GL_WIN_specular_fog
)
{
if ((gc->state.hints.fog == GL_NICEST)
#ifdef GL_WIN_specular_fog
&& !(gc->polygon.shader.modeFlags & __GL_SHADE_SPEC_FOG)
#endif //GL_WIN_specular_fog
)
{
gc->procs.fogVertex = 0; /* Better not be called */
}
else
{
if (gc->state.fog.mode == GL_LINEAR)
gc->procs.fogVertex = __glFogVertexLinear;
else
gc->procs.fogVertex = __glFogVertex;
}
gc->procs.fogPoint = __glFogFragmentSlow;
gc->procs.fogColor = __glFogColorSlow;
}
else
{
gc->procs.fogVertex = 0;
gc->procs.fogPoint = 0;
gc->procs.fogColor = 0;
}
}
void FASTCALL __glGenericPickBufferProcs(__GLcontext *gc)
{
GLint i;
__GLbufferMachine *buffers;
buffers = &gc->buffers;
buffers->doubleStore = GL_FALSE;
/* Set draw buffer pointer */
switch (gc->state.raster.drawBuffer) {
case GL_FRONT:
gc->drawBuffer = gc->front;
break;
case GL_FRONT_AND_BACK:
if (gc->modes.doubleBufferMode) {
gc->drawBuffer = gc->back;
buffers->doubleStore = GL_TRUE;
} else {
gc->drawBuffer = gc->front;
}
break;
case GL_BACK:
gc->drawBuffer = gc->back;
break;
case GL_AUX0:
case GL_AUX1:
case GL_AUX2:
case GL_AUX3:
i = gc->state.raster.drawBuffer - GL_AUX0;
#if __GL_NUMBER_OF_AUX_BUFFERS > 0
gc->drawBuffer = &gc->auxBuffer[i];
#endif
break;
}
}
void FASTCALL __glGenericPickPixelProcs(__GLcontext *gc)
{
__GLpixelTransferMode *tm;
__GLpixelMachine *pm;
GLboolean mapColor;
GLfloat red, green, blue, alpha;
GLint entry;
GLuint enables = gc->state.enables.general;
__GLpixelMapHead *pmap;
GLint i;
/* Set read buffer pointer */
switch (gc->state.pixel.readBuffer) {
case GL_FRONT:
gc->readBuffer = gc->front;
break;
case GL_BACK:
gc->readBuffer = gc->back;
break;
case GL_AUX0:
case GL_AUX1:
case GL_AUX2:
case GL_AUX3:
i = gc->state.pixel.readBuffer - GL_AUX0;
#if __GL_NUMBER_OF_AUX_BUFFERS > 0
gc->readBuffer = &gc->auxBuffer[i];
#endif
break;
}
if (gc->texture.textureEnabled
|| (gc->polygon.shader.modeFlags & __GL_SHADE_SLOW_FOG)) {
gc->procs.pxStore = __glSlowDrawPixelsStore;
} else {
gc->procs.pxStore = gc->procs.store;
}
tm = &gc->state.pixel.transferMode;
pm = &(gc->pixel);
mapColor = tm->mapColor;
if (mapColor || gc->modes.rgbMode || tm->indexShift || tm->indexOffset) {
pm->iToICurrent = GL_FALSE;
pm->iToRGBACurrent = GL_FALSE;
pm->modifyCI = GL_TRUE;
} else {
pm->modifyCI = GL_FALSE;
}
if (tm->mapStencil || tm->indexShift || tm->indexOffset) {
pm->modifyStencil = GL_TRUE;
} else {
pm->modifyStencil = GL_FALSE;
}
if (tm->d_scale != __glOne || tm->d_bias) {
pm->modifyDepth = GL_TRUE;
} else {
pm->modifyDepth = GL_FALSE;
}
if (mapColor || tm->r_bias || tm->g_bias || tm->b_bias || tm->a_bias ||
tm->r_scale != __glOne || tm->g_scale != __glOne ||
tm->b_scale != __glOne || tm->a_scale != __glOne) {
pm->modifyRGBA = GL_TRUE;
pm->rgbaCurrent = GL_FALSE;
} else {
pm->modifyRGBA = GL_FALSE;
}
if (pm->modifyRGBA) {
/* Compute default values for red, green, blue, alpha */
red = gc->state.pixel.transferMode.r_bias;
green = gc->state.pixel.transferMode.g_bias;
blue = gc->state.pixel.transferMode.b_bias;
alpha = gc->state.pixel.transferMode.a_scale +
gc->state.pixel.transferMode.a_bias;
if (mapColor) {
pmap =
&gc->state.pixel.pixelMap[__GL_PIXEL_MAP_R_TO_R];
entry = (GLint)(red * pmap->size);
if (entry < 0) entry = 0;
else if (entry > pmap->size-1) entry = pmap->size-1;
red = pmap->base.mapF[entry];
pmap =
&gc->state.pixel.pixelMap[__GL_PIXEL_MAP_G_TO_G];
entry = (GLint)(green * pmap->size);
if (entry < 0) entry = 0;
else if (entry > pmap->size-1) entry = pmap->size-1;
green = pmap->base.mapF[entry];
pmap =
&gc->state.pixel.pixelMap[__GL_PIXEL_MAP_B_TO_B];
entry = (GLint)(blue * pmap->size);
if (entry < 0) entry = 0;
else if (entry > pmap->size-1) entry = pmap->size-1;
blue = pmap->base.mapF[entry];
pmap =
&gc->state.pixel.pixelMap[__GL_PIXEL_MAP_A_TO_A];
entry = (GLint)(alpha * pmap->size);
if (entry < 0) entry = 0;
else if (entry > pmap->size-1) entry = pmap->size-1;
alpha = pmap->base.mapF[entry];
} else {
if (red > __glOne) red = __glOne;
else if (red < 0) red = 0;
if (green > __glOne) green = __glOne;
else if (green < 0) green = 0;
if (blue > __glOne) blue = __glOne;
else if (blue < 0) blue = 0;
if (alpha > __glOne) alpha = __glOne;
else if (alpha < 0) alpha = 0;
}
pm->red0Mod = red * gc->frontBuffer.redScale;
pm->green0Mod = green * gc->frontBuffer.greenScale;
pm->blue0Mod = blue * gc->frontBuffer.blueScale;
pm->alpha1Mod = alpha * gc->frontBuffer.alphaScale;
} else {
pm->red0Mod = __glZero;
pm->green0Mod = __glZero;
pm->blue0Mod = __glZero;
pm->alpha1Mod = gc->frontBuffer.alphaScale;
}
gc->procs.drawPixels = __glSlowPickDrawPixels;
gc->procs.readPixels = __glSlowPickReadPixels;
gc->procs.copyPixels = __glSlowPickCopyPixels;
}
/*
** pick the depth function pointers
*/
int FASTCALL __glGenericPickDepthProcs(__GLcontext *gc)
{
GLint depthIndex;
depthIndex = gc->state.depth.testFunc - GL_NEVER;
if (gc->modes.depthBits && gc->modes.haveDepthBuffer) {
if (gc->state.depth.writeEnable == GL_FALSE)
depthIndex += 8;
if (gc->depthBuffer.buf.elementSize == 2)
depthIndex += 16;
} else {
/*
** No depthBits so force StoreALWAYS_W, _glDT_ALWAYS_M, etc.
*/
depthIndex = (GL_ALWAYS - GL_NEVER) + 8;
}
(*gc->depthBuffer.pick)(gc, &gc->depthBuffer, depthIndex);
gc->procs.DTPixel = __glCDTPixel[depthIndex];
#ifdef __GL_USEASMCODE
gc->procs.span.depthTestPixel = __glSDepthTestPixel[depthIndex];
gc->procs.line.depthTestPixel = __glPDepthTestPixel[depthIndex];
if( gc->procs.line.depthTestLine ) {
if( __glDTLine[depthIndex] ) {
*(gc->procs.line.depthTestLine) = __glDTLine[depthIndex];
} else {
/*
** If this happens, it may mean one of two things:
** (a) __glDTLine is malformed
** (b) A device-dependent line picker was a bit careless.
** This will probably happen if that implementation is
** not using the slow path.
** Eg: For NEWPORT, AA depth lines go through slow path,
** but non-AA depth lines have a fast path. When switching
** to a non-AA path, we may end up here, but that's ok, since
** we are not using the slow path. If that is about to happen,
** the line picker will be reinvoked.
*/
/*
** use some generic function here that will work
*/
*(gc->procs.line.depthTestLine) = __glDepthTestLine_asm;
}
}
#endif
return depthIndex;
}
void FASTCALL __glGenericValidate(__GLcontext *gc)
{
(*gc->procs.pickAllProcs)(gc);
}
void FASTCALL __glGenericPickAllProcs(__GLcontext *gc)
{
GLuint enables = gc->state.enables.general;
GLuint modeFlags = 0;
if (gc->dirtyMask & (__GL_DIRTY_TEXTURE | __GL_DIRTY_GENERIC)) {
/*
** Set textureEnabled flag early on, so we can set modeFlags
** based upon it.
*/
(*gc->procs.pickTextureProcs)(gc);
gc->texture.textureEnabled = gc->modes.rgbMode
&& gc->texture.currentTexture;
}
if (gc->dirtyMask & (__GL_DIRTY_GENERIC | __GL_DIRTY_LIGHTING)) {
#ifdef _MCD_
MCD_STATE_DIRTY(gc, ENABLES);
#endif
// Check and see whether the current texturing settings will
// completely replace the polygon color
if (gc->texture.textureEnabled &&
#ifdef GL_EXT_flat_paletted_lighting
(enables & __GL_PALETTED_LIGHTING_ENABLE) == 0 &&
#endif
gc->state.texture.env[0].mode == GL_REPLACE &&
(gc->texture.currentTexture->level[0].baseFormat == GL_RGBA ||
gc->texture.currentTexture->level[0].baseFormat == GL_INTENSITY ||
gc->texture.currentTexture->level[0].baseFormat ==
GL_LUMINANCE_ALPHA ||
((enables & __GL_BLEND_ENABLE) == 0 &&
(gc->texture.currentTexture->level[0].baseFormat ==
GL_LUMINANCE ||
gc->texture.currentTexture->level[0].baseFormat == GL_RGB))))
{
modeFlags |= __GL_SHADE_FULL_REPLACE_TEXTURE;
}
}
/* Compute shading mode flags before triangle, span, and line picker */
if (gc->modes.rgbMode) {
modeFlags |= __GL_SHADE_RGB;
if (gc->texture.textureEnabled) {
modeFlags |= __GL_SHADE_TEXTURE;
}
if (enables & __GL_BLEND_ENABLE) {
modeFlags |= __GL_SHADE_BLEND;
}
if (enables & __GL_ALPHA_TEST_ENABLE) {
modeFlags |= __GL_SHADE_ALPHA_TEST;
}
if (enables & __GL_COLOR_LOGIC_OP_ENABLE) {
modeFlags |= __GL_SHADE_LOGICOP;
}
if (!gc->state.raster.rMask ||
!gc->state.raster.gMask ||
!gc->state.raster.bMask
#ifndef NT
// NT doesn't support destination alpha so there's no point
// in worrying about the alpha mask since we'll never write
// alpha values anyway
|| !gc->state.raster.aMask
#endif
)
{
modeFlags |= __GL_SHADE_MASK;
}
} else {
if (enables & __GL_INDEX_LOGIC_OP_ENABLE) {
modeFlags |= __GL_SHADE_LOGICOP;
}
if (gc->state.raster.writeMask != __GL_MASK_INDEXI(gc, ~0)) {
modeFlags |= __GL_SHADE_MASK;
}
}
if (gc->state.light.shadingModel == GL_SMOOTH) {
modeFlags |= __GL_SHADE_SMOOTH | __GL_SHADE_SMOOTH_LIGHT;
#ifdef GL_WIN_phong_shading
} else if (gc->state.light.shadingModel == GL_PHONG_WIN) {
if (enables & __GL_LIGHTING_ENABLE)
modeFlags |= __GL_SHADE_PHONG;
else
modeFlags |= __GL_SHADE_SMOOTH | __GL_SHADE_SMOOTH_LIGHT;
#endif //GL_WIN_phong_shading
}
if ((enables & __GL_DEPTH_TEST_ENABLE) &&
gc->modes.haveDepthBuffer) {
modeFlags |= ( __GL_SHADE_DEPTH_TEST | __GL_SHADE_DEPTH_ITER );
}
if (enables & __GL_CULL_FACE_ENABLE) {
modeFlags |= __GL_SHADE_CULL_FACE;
}
if (enables & __GL_DITHER_ENABLE) {
modeFlags |= __GL_SHADE_DITHER;
}
if (enables & __GL_POLYGON_STIPPLE_ENABLE) {
modeFlags |= __GL_SHADE_STIPPLE;
}
if (enables & __GL_LINE_STIPPLE_ENABLE) {
modeFlags |= __GL_SHADE_LINE_STIPPLE;
}
if ((enables & __GL_STENCIL_TEST_ENABLE) &&
gc->modes.haveStencilBuffer) {
modeFlags |= __GL_SHADE_STENCIL_TEST;
}
if ((enables & __GL_LIGHTING_ENABLE) &&
gc->state.light.model.twoSided) {
modeFlags |= __GL_SHADE_TWOSIDED;
}
#ifdef GL_WIN_specular_fog
/*
** Specularly lit textures using fog only if:
** -- Lighting is enabled
** -- Texturing is enabled
** -- Texturing mode is GL_MODULATE
** -- Lighting calculation is not skipped
** -- No two sided lighting
*/
if (
(gc->state.texture.env[0].mode == GL_MODULATE) &&
(enables & __GL_FOG_SPEC_TEX_ENABLE) &&
(enables & __GL_LIGHTING_ENABLE) &&
!(modeFlags & __GL_SHADE_TWOSIDED) &&
(modeFlags & __GL_SHADE_TEXTURE) &&
!(
(modeFlags & __GL_SHADE_FULL_REPLACE_TEXTURE) &&
(gc->renderMode == GL_RENDER)
)
)
{
modeFlags |= __GL_SHADE_SPEC_FOG;
modeFlags |= __GL_SHADE_INTERP_FOG;
}
#endif //GL_WIN_specular_fog
if (enables & __GL_FOG_ENABLE)
{
/* Figure out type of fogging to do. Try to do cheap fog */
if (!(modeFlags & __GL_SHADE_TEXTURE) &&
#ifdef GL_WIN_phong_shading
!(modeFlags & __GL_SHADE_PHONG) &&
#endif //GL_WIN_phong_shading
(gc->state.hints.fog != GL_NICEST)) {
/*
#ifdef NT
** Cheap fog can be done. Now figure out which kind we
** will do. If smooth shading, its easy - just update
** the color in DrawPolyArray. Otherwise, set has flag
** later on to use smooth shading to do flat shaded fogging.
#else
** Cheap fog can be done. Now figure out which kind we
** will do. If smooth shading, its easy - just change
** the calcColor proc (let the color proc picker do it).
** Otherwise, set has flag later on to use smooth shading
** to do flat shaded fogging.
#endif
*/
modeFlags |= __GL_SHADE_CHEAP_FOG | __GL_SHADE_SMOOTH;
} else {
/* Use slowest fog mode */
modeFlags |= __GL_SHADE_SLOW_FOG;
if ((gc->state.hints.fog == GL_NICEST)
#ifdef GL_WIN_specular_fog
&& (!(modeFlags & __GL_SHADE_SPEC_FOG))
#endif //GL_WIN_specular_fog
)
{
modeFlags |= __GL_SHADE_COMPUTE_FOG;
}
else
{
modeFlags |= __GL_SHADE_INTERP_FOG;
}
}
}
gc->polygon.shader.modeFlags = modeFlags;
if (gc->dirtyMask & (__GL_DIRTY_GENERIC | __GL_DIRTY_LIGHTING)) {
(*gc->front->pick)(gc, gc->front);
if (gc->modes.doubleBufferMode) {
(*gc->back->pick)(gc, gc->back);
}
#if __GL_NUMBER_OF_AUX_BUFFERS > 0
{
GLint i;
for (i = 0; i < gc->modes.maxAuxBuffers; i++) {
(*gc->auxBuffer[i].pick)(gc, &gc->auxBuffer[i]);
}
}
#endif
if (gc->modes.haveStencilBuffer) {
(*gc->stencilBuffer.pick)(gc, &gc->stencilBuffer);
}
(*gc->procs.pickBufferProcs)(gc);
/*
** Note: Must call gc->front->pick and gc->back->pick before calling
** pickStoreProcs. This also must be called prior to line, point,
** polygon, clipping, or bitmap pickers. The LIGHT implementation
** depends upon it.
*/
(*gc->procs.pickStoreProcs)(gc);
#ifdef NT
/*
** Compute the color material change bits before lighting since
** __glValidateLighting calls ComputeMaterialState.
*/
ComputeColorMaterialChange(gc);
#endif
__glValidateLighting(gc);
/*
** Note: pickColorMaterialProcs is called frequently outside of this
** generic picking routine.
*/
(*gc->procs.pickColorMaterialProcs)(gc);
(*gc->procs.pickBlendProcs)(gc);
(*gc->procs.pickFogProcs)(gc);
(*gc->procs.pickParameterClipProcs)(gc);
(*gc->procs.pickClipProcs)(gc);
/*
** Needs to be done after pickStoreProcs.
*/
(*gc->procs.pickRenderBitmapProcs)(gc);
if (gc->validateMask & __GL_VALIDATE_ALPHA_FUNC) {
__glValidateAlphaTest(gc);
}
}
#ifdef NT
// Compute paNeeds flags PANEEDS_TEXCOORD, PANEEDS_NORMAL,
// PANEEDS_RASTERPOS_NORMAL, PANEEDS_CLIP_ONLY, and PANEEDS_SKIP_LIGHTING.
if (gc->dirtyMask & (__GL_DIRTY_GENERIC | __GL_DIRTY_LIGHTING))
{
GLuint paNeeds;
paNeeds = gc->vertex.paNeeds;
paNeeds &= ~(PANEEDS_TEXCOORD | PANEEDS_NORMAL |
PANEEDS_RASTERPOS_NORMAL | PANEEDS_CLIP_ONLY |
PANEEDS_SKIP_LIGHTING);
// Compute PANEEDS_SKIP_LIGHTING flag.
// If we're rendering with a replace mode texture which fills all
// the color components then lighting is unnecessary in most cases.
if ((modeFlags & __GL_SHADE_FULL_REPLACE_TEXTURE) &&
(gc->renderMode == GL_RENDER))
paNeeds |= PANEEDS_SKIP_LIGHTING;
// Compute PANEEDS_TEXCOORD.
// Feedback needs texture coordinates when the feedback type is
// GL_3D_COLOR_TEXTURE or GL_4D_COLOR_TEXTURE whether or not it is
// enabled.
if (gc->texture.textureEnabled || gc->renderMode == GL_FEEDBACK)
paNeeds |= PANEEDS_TEXCOORD;
// Compute PANEEDS_NORMAL.
#ifdef NEW_NORMAL_PROCESSING
if(enables & __GL_LIGHTING_ENABLE &&
!(paNeeds & PANEEDS_SKIP_LIGHTING)) // uses PANEEDS_SKIP_LIGHTING computed above
paNeeds |= PANEEDS_NORMAL;
if (
((paNeeds & PANEEDS_TEXCOORD) // uses PANEEDS_TEXCOORD computed above!
&& (enables & __GL_TEXTURE_GEN_S_ENABLE)
&& (gc->state.texture.s.mode == GL_SPHERE_MAP))
||
((paNeeds & PANEEDS_TEXCOORD) // uses PANEEDS_TEXCOORD computed above!
&& (enables & __GL_TEXTURE_GEN_T_ENABLE)
&& (gc->state.texture.t.mode == GL_SPHERE_MAP))
)
paNeeds |= PANEEDS_NORMAL_FOR_TEXTURE;
#else
if
(
((enables & __GL_LIGHTING_ENABLE)
&& !(paNeeds & PANEEDS_SKIP_LIGHTING)) // uses PANEEDS_SKIP_LIGHTING computed above
||
((paNeeds & PANEEDS_TEXCOORD) // uses PANEEDS_TEXCOORD computed above!
&& (enables & __GL_TEXTURE_GEN_S_ENABLE)
&& (gc->state.texture.s.mode == GL_SPHERE_MAP))
||
((paNeeds & PANEEDS_TEXCOORD) // uses PANEEDS_TEXCOORD computed above!
&& (enables & __GL_TEXTURE_GEN_T_ENABLE)
&& (gc->state.texture.t.mode == GL_SPHERE_MAP))
)
paNeeds |= PANEEDS_NORMAL | PANEEDS_NORMAL_FOR_TEXTURE;
#endif
// Compute PANEEDS_RASTERPOS_NORMAL.
#ifdef NEW_NORMAL_PROCESSING
if (enables & __GL_LIGHTING_ENABLE)
paNeeds |= PANEEDS_RASTERPOS_NORMAL;
if ((enables & __GL_TEXTURE_GEN_S_ENABLE && gc->state.texture.s.mode == GL_SPHERE_MAP)
||
(enables & __GL_TEXTURE_GEN_T_ENABLE && gc->state.texture.t.mode == GL_SPHERE_MAP))
paNeeds |= PANEEDS_RASTERPOS_NORMAL_FOR_TEXTURE;
#else
if
(
(enables & __GL_LIGHTING_ENABLE)
||
((enables & __GL_TEXTURE_GEN_S_ENABLE)
&& (gc->state.texture.s.mode == GL_SPHERE_MAP))
||
((enables & __GL_TEXTURE_GEN_T_ENABLE)
&& (gc->state.texture.t.mode == GL_SPHERE_MAP))
)
paNeeds |= PANEEDS_RASTERPOS_NORMAL;
#endif
// Compute PANEEDS_CLIP_ONLY.
// It is set in selection mode to take a fast path in DrawPolyArray.
// It must be cleared by RasterPos before calling DrawPolyArray!
if (gc->renderMode == GL_SELECT)
{
paNeeds |= PANEEDS_CLIP_ONLY;
paNeeds &= ~PANEEDS_NORMAL;
}
gc->vertex.paNeeds = paNeeds;
}
// Compute PANEEDS_EDGEFLAG flag
// __GL_DIRTY_POLYGON test is probably sufficient.
if (gc->dirtyMask & (__GL_DIRTY_GENERIC | __GL_DIRTY_POLYGON))
{
if (gc->state.polygon.frontMode != GL_FILL
|| gc->state.polygon.backMode != GL_FILL)
gc->vertex.paNeeds |= PANEEDS_EDGEFLAG;
else
gc->vertex.paNeeds &= ~PANEEDS_EDGEFLAG;
}
#endif // NT
if (gc->dirtyMask & __GL_DIRTY_POLYGON_STIPPLE) {
/*
** Usually, the polygon stipple is converted immediately after
** it is changed. However, if the polygon stipple was changed
** when this context was the destination of a CopyContext, then
** the polygon stipple will be converted here.
*/
(*gc->procs.convertPolygonStipple)(gc);
}
// Compute paNeeds flags PANEEDS_FRONT_COLOR and PANEEDS_BACK_COLOR
if (gc->dirtyMask & (__GL_DIRTY_GENERIC | __GL_DIRTY_POLYGON |
__GL_DIRTY_LIGHTING | __GL_DIRTY_DEPTH))
{
GLuint paNeeds;
/*
** May be used for picking Rect() procs, need to check polygon
** bit. Must also be called after gc->vertex.needs is set.!!!
** Needs to be called prior to point, line, and triangle pickers.
** Also needs to be called after the store procs picker is called.
*/
(*gc->procs.pickVertexProcs)(gc);
(*gc->procs.pickSpanProcs)(gc);
(*gc->procs.pickTriangleProcs)(gc);
#ifdef NT
// Compute front and back color needs for polygons.
// Points and lines always use the front color.
// Unlit primitives always use the front color.
//
// Cull enable? Two sided? Cull face Color needs
// N N BACK FRONT
// N N FRONT FRONT
// N N FRONT_AND_BACK FRONT
// N Y BACK FRONT/BACK
// N Y FRONT FRONT/BACK
// N Y FRONT_AND_BACK FRONT/BACK
// Y N BACK FRONT
// Y N FRONT FRONT
// Y N FRONT_AND_BACK None
// Y Y BACK FRONT
// Y Y FRONT BACK
// Y Y FRONT_AND_BACK None
paNeeds = gc->vertex.paNeeds;
paNeeds &= ~(PANEEDS_FRONT_COLOR | PANEEDS_BACK_COLOR);
if (enables & __GL_LIGHTING_ENABLE)
{
if (!(enables & __GL_CULL_FACE_ENABLE))
{
if (gc->state.light.model.twoSided)
paNeeds |= PANEEDS_FRONT_COLOR | PANEEDS_BACK_COLOR;
else
paNeeds |= PANEEDS_FRONT_COLOR;
}
else
{
if (!(gc->state.polygon.cull == GL_FRONT_AND_BACK))
{
if (gc->state.polygon.cull == GL_FRONT
&& gc->state.light.model.twoSided)
paNeeds |= PANEEDS_BACK_COLOR;
else
paNeeds |= PANEEDS_FRONT_COLOR;
}
}
}
else
paNeeds |= PANEEDS_FRONT_COLOR;
gc->vertex.paNeeds = paNeeds;
#endif
}
if (gc->dirtyMask & (__GL_DIRTY_GENERIC | __GL_DIRTY_POINT |
__GL_DIRTY_LIGHTING | __GL_DIRTY_DEPTH)) {
(*gc->procs.pickPointProcs)(gc);
}
if (gc->dirtyMask & (__GL_DIRTY_GENERIC | __GL_DIRTY_LINE |
__GL_DIRTY_LIGHTING | __GL_DIRTY_DEPTH)) {
(*gc->procs.pickLineProcs)(gc);
}
if (gc->dirtyMask & (__GL_DIRTY_GENERIC | __GL_DIRTY_PIXEL |
__GL_DIRTY_LIGHTING | __GL_DIRTY_DEPTH)) {
(*gc->procs.pickPixelProcs)(gc);
}
/*
** deal with the depth function pointers last. This has to be done last.
*/
if (gc->dirtyMask & (__GL_DIRTY_GENERIC | __GL_DIRTY_DEPTH)) {
(*gc->procs.pickDepthProcs)(gc);
}
gc->validateMask = 0;
gc->dirtyMask = 0;
}
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