From 9715b7fab0757c86e1bb151f3dce0b324bcff692 Mon Sep 17 00:00:00 2001 From: marha Date: Wed, 28 Dec 2011 23:31:50 +0100 Subject: xserver libX11 mesa xkeyboard-config git update 28 dec 2011 --- mesalib/src/mesa/tnl/t_context.c | 20 +- mesalib/src/mesa/tnl/t_context.h | 20 +- mesalib/src/mesa/tnl/t_rasterpos.c | 967 ++++++++++++++++++------------------- 3 files changed, 495 insertions(+), 512 deletions(-) (limited to 'mesalib/src/mesa/tnl') diff --git a/mesalib/src/mesa/tnl/t_context.c b/mesalib/src/mesa/tnl/t_context.c index a6da8cafe..1ded44ccf 100644 --- a/mesalib/src/mesa/tnl/t_context.c +++ b/mesalib/src/mesa/tnl/t_context.c @@ -121,20 +121,19 @@ _tnl_InvalidateState( struct gl_context *ctx, GLuint new_state ) /* Calculate tnl->render_inputs. This bitmask indicates which vertex * attributes need to be emitted to the rasterizer. */ - RENDERINPUTS_ZERO( tnl->render_inputs_bitset ); - RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POS ); + tnl->render_inputs_bitset = BITFIELD64_BIT(_TNL_ATTRIB_POS); if (!fp || (fp->Base.InputsRead & FRAG_BIT_COL0)) { - RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR0 ); + tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_COLOR0); } if (_mesa_need_secondary_color(ctx)) - RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_COLOR1 ); + tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_COLOR1); for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) { if (ctx->Texture._EnabledCoordUnits & (1 << i) || (fp && fp->Base.InputsRead & FRAG_BIT_TEX(i))) { - RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX(i) ); + tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_TEX(i)); } } @@ -142,27 +141,26 @@ _tnl_InvalidateState( struct gl_context *ctx, GLuint new_state ) || (fp != NULL && (fp->Base.InputsRead & FRAG_BIT_FOGC) != 0)) { /* Either fixed-function fog or a fragment program needs fog coord. */ - RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_FOG ); + tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_FOG); } if (ctx->Polygon.FrontMode != GL_FILL || ctx->Polygon.BackMode != GL_FILL) - RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_EDGEFLAG ); + tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_EDGEFLAG); if (ctx->RenderMode == GL_FEEDBACK) - RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_TEX0 ); + tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_TEX0); if (ctx->Point._Attenuated || (ctx->VertexProgram._Enabled && ctx->VertexProgram.PointSizeEnabled)) - RENDERINPUTS_SET( tnl->render_inputs_bitset, _TNL_ATTRIB_POINTSIZE ); + tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_POINTSIZE); /* check for varying vars which are written by the vertex program */ if (vp) { GLuint i; for (i = 0; i < MAX_VARYING; i++) { if (vp->Base.OutputsWritten & BITFIELD64_BIT(VERT_RESULT_VAR0 + i)) { - RENDERINPUTS_SET(tnl->render_inputs_bitset, - _TNL_ATTRIB_GENERIC(i)); + tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_GENERIC(i)); } } } diff --git a/mesalib/src/mesa/tnl/t_context.h b/mesalib/src/mesa/tnl/t_context.h index 36b104354..c5a902082 100644 --- a/mesalib/src/mesa/tnl/t_context.h +++ b/mesalib/src/mesa/tnl/t_context.h @@ -50,7 +50,7 @@ #define _T_CONTEXT_H #include "main/glheader.h" -#include "main/bitset.h" +#include "main/imports.h" #include "main/mtypes.h" #include "math/m_vector.h" @@ -162,6 +162,9 @@ enum { #define _TNL_FIRST_MAT _TNL_ATTRIB_MAT_FRONT_AMBIENT /* GENERIC0 */ #define _TNL_LAST_MAT _TNL_ATTRIB_MAT_BACK_INDEXES /* GENERIC11 */ +/* Number of available texture attributes */ +#define _TNL_NUM_TEX 8 + /* Number of available generic attributes */ #define _TNL_NUM_GENERIC 16 @@ -480,19 +483,6 @@ struct tnl_device_driver }; -#define DECLARE_RENDERINPUTS(name) BITSET64_DECLARE(name, _TNL_ATTRIB_MAX) -#define RENDERINPUTS_COPY BITSET64_COPY -#define RENDERINPUTS_EQUAL BITSET64_EQUAL -#define RENDERINPUTS_ZERO BITSET64_ZERO -#define RENDERINPUTS_ONES BITSET64_ONES -#define RENDERINPUTS_TEST BITSET64_TEST -#define RENDERINPUTS_SET BITSET64_SET -#define RENDERINPUTS_CLEAR BITSET64_CLEAR -#define RENDERINPUTS_TEST_RANGE BITSET64_TEST_RANGE -#define RENDERINPUTS_SET_RANGE BITSET64_SET_RANGE -#define RENDERINPUTS_CLEAR_RANGE BITSET64_CLEAR_RANGE - - /** * Context state for T&L context. */ @@ -518,7 +508,7 @@ typedef struct GLboolean AllowPixelFog; GLboolean _DoVertexFog; /* eval fog function at each vertex? */ - DECLARE_RENDERINPUTS(render_inputs_bitset); + GLbitfield64 render_inputs_bitset; GLvector4f tmp_inputs[VERT_ATTRIB_MAX]; diff --git a/mesalib/src/mesa/tnl/t_rasterpos.c b/mesalib/src/mesa/tnl/t_rasterpos.c index 78aa8880f..a7e4397b6 100644 --- a/mesalib/src/mesa/tnl/t_rasterpos.c +++ b/mesalib/src/mesa/tnl/t_rasterpos.c @@ -1,486 +1,481 @@ -/* - * Mesa 3-D graphics library - * Version: 7.1 - * - * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the "Software"), - * to deal in the Software without restriction, including without limitation - * the rights to use, copy, modify, merge, publish, distribute, sublicense, - * and/or sell copies of the Software, and to permit persons to whom the - * Software is furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included - * in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN - * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - - -#include "main/glheader.h" -#include "main/colormac.h" -#include "main/feedback.h" -#include "main/light.h" -#include "main/macros.h" -#include "main/simple_list.h" -#include "main/mtypes.h" - -#include "math/m_matrix.h" -#include "tnl/tnl.h" - - - -/** - * Clip a point against the view volume. - * - * \param v vertex vector describing the point to clip. - * - * \return zero if outside view volume, or one if inside. - */ -static GLuint -viewclip_point_xy( const GLfloat v[] ) -{ - if ( v[0] > v[3] || v[0] < -v[3] - || v[1] > v[3] || v[1] < -v[3] ) { - return 0; - } - else { - return 1; - } -} - - -/** - * Clip a point against the far/near Z clipping planes. - * - * \param v vertex vector describing the point to clip. - * - * \return zero if outside view volume, or one if inside. - */ -static GLuint -viewclip_point_z( const GLfloat v[] ) -{ - if (v[2] > v[3] || v[2] < -v[3] ) { - return 0; - } - else { - return 1; - } -} - - -/** - * Clip a point against the user clipping planes. - * - * \param ctx GL context. - * \param v vertex vector describing the point to clip. - * - * \return zero if the point was clipped, or one otherwise. - */ -static GLuint -userclip_point( struct gl_context *ctx, const GLfloat v[] ) -{ - GLuint p; - - for (p = 0; p < ctx->Const.MaxClipPlanes; p++) { - if (ctx->Transform.ClipPlanesEnabled & (1 << p)) { - GLfloat dot = v[0] * ctx->Transform._ClipUserPlane[p][0] - + v[1] * ctx->Transform._ClipUserPlane[p][1] - + v[2] * ctx->Transform._ClipUserPlane[p][2] - + v[3] * ctx->Transform._ClipUserPlane[p][3]; - if (dot < 0.0F) { - return 0; - } - } - } - - return 1; -} - - -/** - * Compute lighting for the raster position. Both RGB and CI modes computed. - * \param ctx the context - * \param vertex vertex location - * \param normal normal vector - * \param Rcolor returned color - * \param Rspec returned specular color (if separate specular enabled) - * \param Rindex returned color index - */ -static void -shade_rastpos(struct gl_context *ctx, - const GLfloat vertex[4], - const GLfloat normal[3], - GLfloat Rcolor[4], - GLfloat Rspec[4]) -{ - /*const*/ GLfloat (*base)[3] = ctx->Light._BaseColor; - const struct gl_light *light; - GLfloat diffuseColor[4], specularColor[4]; /* for RGB mode only */ - GLfloat diffuseCI = 0.0, specularCI = 0.0; /* for CI mode only */ - - _mesa_validate_all_lighting_tables( ctx ); - - COPY_3V(diffuseColor, base[0]); - diffuseColor[3] = CLAMP( - ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3], 0.0F, 1.0F ); - ASSIGN_4V(specularColor, 0.0, 0.0, 0.0, 1.0); - - foreach (light, &ctx->Light.EnabledList) { - GLfloat attenuation = 1.0; - GLfloat VP[3]; /* vector from vertex to light pos */ - GLfloat n_dot_VP; - GLfloat diffuseContrib[3], specularContrib[3]; - - if (!(light->_Flags & LIGHT_POSITIONAL)) { - /* light at infinity */ - COPY_3V(VP, light->_VP_inf_norm); - attenuation = light->_VP_inf_spot_attenuation; - } - else { - /* local/positional light */ - GLfloat d; - - /* VP = vector from vertex pos to light[i].pos */ - SUB_3V(VP, light->_Position, vertex); - /* d = length(VP) */ - d = (GLfloat) LEN_3FV( VP ); - if (d > 1.0e-6) { - /* normalize VP */ - GLfloat invd = 1.0F / d; - SELF_SCALE_SCALAR_3V(VP, invd); - } - - /* atti */ - attenuation = 1.0F / (light->ConstantAttenuation + d * - (light->LinearAttenuation + d * - light->QuadraticAttenuation)); - - if (light->_Flags & LIGHT_SPOT) { - GLfloat PV_dot_dir = - DOT3(VP, light->_NormSpotDirection); - - if (PV_dot_dir_CosCutoff) { - continue; - } - else { - double x = PV_dot_dir * (EXP_TABLE_SIZE-1); - int k = (int) x; - GLfloat spot = (GLfloat) (light->_SpotExpTable[k][0] - + (x-k)*light->_SpotExpTable[k][1]); - attenuation *= spot; - } - } - } - - if (attenuation < 1e-3) - continue; - - n_dot_VP = DOT3( normal, VP ); - - if (n_dot_VP < 0.0F) { - ACC_SCALE_SCALAR_3V(diffuseColor, attenuation, light->_MatAmbient[0]); - continue; - } - - /* Ambient + diffuse */ - COPY_3V(diffuseContrib, light->_MatAmbient[0]); - ACC_SCALE_SCALAR_3V(diffuseContrib, n_dot_VP, light->_MatDiffuse[0]); - diffuseCI += n_dot_VP * light->_dli * attenuation; - - /* Specular */ - { - const GLfloat *h; - GLfloat n_dot_h; - - ASSIGN_3V(specularContrib, 0.0, 0.0, 0.0); - - if (ctx->Light.Model.LocalViewer) { - GLfloat v[3]; - COPY_3V(v, vertex); - NORMALIZE_3FV(v); - SUB_3V(VP, VP, v); - NORMALIZE_3FV(VP); - h = VP; - } - else if (light->_Flags & LIGHT_POSITIONAL) { - ACC_3V(VP, ctx->_EyeZDir); - NORMALIZE_3FV(VP); - h = VP; - } - else { - h = light->_h_inf_norm; - } - - n_dot_h = DOT3(normal, h); - - if (n_dot_h > 0.0F) { - GLfloat spec_coef; - GET_SHINE_TAB_ENTRY( ctx->_ShineTable[0], n_dot_h, spec_coef ); - - if (spec_coef > 1.0e-10) { - if (ctx->Light.Model.ColorControl==GL_SEPARATE_SPECULAR_COLOR) { - ACC_SCALE_SCALAR_3V( specularContrib, spec_coef, - light->_MatSpecular[0]); - } - else { - ACC_SCALE_SCALAR_3V( diffuseContrib, spec_coef, - light->_MatSpecular[0]); - } - /*assert(light->_sli > 0.0);*/ - specularCI += spec_coef * light->_sli * attenuation; - } - } - } - - ACC_SCALE_SCALAR_3V( diffuseColor, attenuation, diffuseContrib ); - ACC_SCALE_SCALAR_3V( specularColor, attenuation, specularContrib ); - } - - Rcolor[0] = CLAMP(diffuseColor[0], 0.0F, 1.0F); - Rcolor[1] = CLAMP(diffuseColor[1], 0.0F, 1.0F); - Rcolor[2] = CLAMP(diffuseColor[2], 0.0F, 1.0F); - Rcolor[3] = CLAMP(diffuseColor[3], 0.0F, 1.0F); - Rspec[0] = CLAMP(specularColor[0], 0.0F, 1.0F); - Rspec[1] = CLAMP(specularColor[1], 0.0F, 1.0F); - Rspec[2] = CLAMP(specularColor[2], 0.0F, 1.0F); - Rspec[3] = CLAMP(specularColor[3], 0.0F, 1.0F); -} - - -/** - * Do texgen needed for glRasterPos. - * \param ctx rendering context - * \param vObj object-space vertex coordinate - * \param vEye eye-space vertex coordinate - * \param normal vertex normal - * \param unit texture unit number - * \param texcoord incoming texcoord and resulting texcoord - */ -static void -compute_texgen(struct gl_context *ctx, const GLfloat vObj[4], const GLfloat vEye[4], - const GLfloat normal[3], GLuint unit, GLfloat texcoord[4]) -{ - const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; - - /* always compute sphere map terms, just in case */ - GLfloat u[3], two_nu, rx, ry, rz, m, mInv; - COPY_3V(u, vEye); - NORMALIZE_3FV(u); - two_nu = 2.0F * DOT3(normal, u); - rx = u[0] - normal[0] * two_nu; - ry = u[1] - normal[1] * two_nu; - rz = u[2] - normal[2] * two_nu; - m = rx * rx + ry * ry + (rz + 1.0F) * (rz + 1.0F); - if (m > 0.0F) - mInv = 0.5F * _mesa_inv_sqrtf(m); - else - mInv = 0.0F; - - if (texUnit->TexGenEnabled & S_BIT) { - switch (texUnit->GenS.Mode) { - case GL_OBJECT_LINEAR: - texcoord[0] = DOT4(vObj, texUnit->GenS.ObjectPlane); - break; - case GL_EYE_LINEAR: - texcoord[0] = DOT4(vEye, texUnit->GenS.EyePlane); - break; - case GL_SPHERE_MAP: - texcoord[0] = rx * mInv + 0.5F; - break; - case GL_REFLECTION_MAP: - texcoord[0] = rx; - break; - case GL_NORMAL_MAP: - texcoord[0] = normal[0]; - break; - default: - _mesa_problem(ctx, "Bad S texgen in compute_texgen()"); - return; - } - } - - if (texUnit->TexGenEnabled & T_BIT) { - switch (texUnit->GenT.Mode) { - case GL_OBJECT_LINEAR: - texcoord[1] = DOT4(vObj, texUnit->GenT.ObjectPlane); - break; - case GL_EYE_LINEAR: - texcoord[1] = DOT4(vEye, texUnit->GenT.EyePlane); - break; - case GL_SPHERE_MAP: - texcoord[1] = ry * mInv + 0.5F; - break; - case GL_REFLECTION_MAP: - texcoord[1] = ry; - break; - case GL_NORMAL_MAP: - texcoord[1] = normal[1]; - break; - default: - _mesa_problem(ctx, "Bad T texgen in compute_texgen()"); - return; - } - } - - if (texUnit->TexGenEnabled & R_BIT) { - switch (texUnit->GenR.Mode) { - case GL_OBJECT_LINEAR: - texcoord[2] = DOT4(vObj, texUnit->GenR.ObjectPlane); - break; - case GL_EYE_LINEAR: - texcoord[2] = DOT4(vEye, texUnit->GenR.EyePlane); - break; - case GL_REFLECTION_MAP: - texcoord[2] = rz; - break; - case GL_NORMAL_MAP: - texcoord[2] = normal[2]; - break; - default: - _mesa_problem(ctx, "Bad R texgen in compute_texgen()"); - return; - } - } - - if (texUnit->TexGenEnabled & Q_BIT) { - switch (texUnit->GenQ.Mode) { - case GL_OBJECT_LINEAR: - texcoord[3] = DOT4(vObj, texUnit->GenQ.ObjectPlane); - break; - case GL_EYE_LINEAR: - texcoord[3] = DOT4(vEye, texUnit->GenQ.EyePlane); - break; - default: - _mesa_problem(ctx, "Bad Q texgen in compute_texgen()"); - return; - } - } -} - - -/** - * glRasterPos transformation. Typically called via ctx->Driver.RasterPos(). - * XXX some of this code (such as viewport xform, clip testing and setting - * of ctx->Current.Raster* fields) could get lifted up into the - * main/rasterpos.c code. - * - * \param vObj vertex position in object space - */ -void -_tnl_RasterPos(struct gl_context *ctx, const GLfloat vObj[4]) -{ - if (ctx->VertexProgram._Enabled) { - /* XXX implement this */ - _mesa_problem(ctx, "Vertex programs not implemented for glRasterPos"); - return; - } - else { - GLfloat eye[4], clip[4], ndc[3], d; - GLfloat *norm, eyenorm[3]; - GLfloat *objnorm = ctx->Current.Attrib[VERT_ATTRIB_NORMAL]; - - /* apply modelview matrix: eye = MV * obj */ - TRANSFORM_POINT( eye, ctx->ModelviewMatrixStack.Top->m, vObj ); - /* apply projection matrix: clip = Proj * eye */ - TRANSFORM_POINT( clip, ctx->ProjectionMatrixStack.Top->m, eye ); - - /* clip to view volume. */ - if (!ctx->Transform.DepthClamp) { - if (viewclip_point_z(clip) == 0) { - ctx->Current.RasterPosValid = GL_FALSE; - return; - } - } - if (!ctx->Transform.RasterPositionUnclipped) { - if (viewclip_point_xy(clip) == 0) { - ctx->Current.RasterPosValid = GL_FALSE; - return; - } - } - - /* clip to user clipping planes */ - if (ctx->Transform.ClipPlanesEnabled && !userclip_point(ctx, clip)) { - ctx->Current.RasterPosValid = GL_FALSE; - return; - } - - /* ndc = clip / W */ - d = (clip[3] == 0.0F) ? 1.0F : 1.0F / clip[3]; - ndc[0] = clip[0] * d; - ndc[1] = clip[1] * d; - ndc[2] = clip[2] * d; - /* wincoord = viewport_mapping(ndc) */ - ctx->Current.RasterPos[0] = (ndc[0] * ctx->Viewport._WindowMap.m[MAT_SX] - + ctx->Viewport._WindowMap.m[MAT_TX]); - ctx->Current.RasterPos[1] = (ndc[1] * ctx->Viewport._WindowMap.m[MAT_SY] - + ctx->Viewport._WindowMap.m[MAT_TY]); - ctx->Current.RasterPos[2] = (ndc[2] * ctx->Viewport._WindowMap.m[MAT_SZ] - + ctx->Viewport._WindowMap.m[MAT_TZ]) - / ctx->DrawBuffer->_DepthMaxF; - ctx->Current.RasterPos[3] = clip[3]; - - if (ctx->Transform.DepthClamp) { - ctx->Current.RasterPos[3] = CLAMP(ctx->Current.RasterPos[3], - ctx->Viewport.Near, - ctx->Viewport.Far); - } - - /* compute raster distance */ - if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT) - ctx->Current.RasterDistance = ctx->Current.Attrib[VERT_ATTRIB_FOG][0]; - else - ctx->Current.RasterDistance = - SQRTF( eye[0]*eye[0] + eye[1]*eye[1] + eye[2]*eye[2] ); - - /* compute transformed normal vector (for lighting or texgen) */ - if (ctx->_NeedEyeCoords) { - const GLfloat *inv = ctx->ModelviewMatrixStack.Top->inv; - TRANSFORM_NORMAL( eyenorm, objnorm, inv ); - norm = eyenorm; - } - else { - norm = objnorm; - } - - /* update raster color */ - if (ctx->Light.Enabled) { - /* lighting */ - shade_rastpos( ctx, vObj, norm, - ctx->Current.RasterColor, - ctx->Current.RasterSecondaryColor ); - } - else { - /* use current color */ - COPY_4FV(ctx->Current.RasterColor, - ctx->Current.Attrib[VERT_ATTRIB_COLOR0]); - COPY_4FV(ctx->Current.RasterSecondaryColor, - ctx->Current.Attrib[VERT_ATTRIB_COLOR1]); - } - - /* texture coords */ - { - GLuint u; - for (u = 0; u < ctx->Const.MaxTextureCoordUnits; u++) { - GLfloat tc[4]; - COPY_4V(tc, ctx->Current.Attrib[VERT_ATTRIB_TEX0 + u]); - if (ctx->Texture.Unit[u].TexGenEnabled) { - compute_texgen(ctx, vObj, eye, norm, u, tc); - } - TRANSFORM_POINT(ctx->Current.RasterTexCoords[u], - ctx->TextureMatrixStack[u].Top->m, tc); - } - } - - ctx->Current.RasterPosValid = GL_TRUE; - } - - if (ctx->RenderMode == GL_SELECT) { - _mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] ); - } -} +/* + * Mesa 3-D graphics library + * Version: 7.1 + * + * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN + * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + + +#include "main/glheader.h" +#include "main/colormac.h" +#include "main/feedback.h" +#include "main/light.h" +#include "main/macros.h" +#include "main/simple_list.h" +#include "main/mtypes.h" + +#include "math/m_matrix.h" +#include "tnl/tnl.h" + + + +/** + * Clip a point against the view volume. + * + * \param v vertex vector describing the point to clip. + * + * \return zero if outside view volume, or one if inside. + */ +static GLuint +viewclip_point_xy( const GLfloat v[] ) +{ + if ( v[0] > v[3] || v[0] < -v[3] + || v[1] > v[3] || v[1] < -v[3] ) { + return 0; + } + else { + return 1; + } +} + + +/** + * Clip a point against the far/near Z clipping planes. + * + * \param v vertex vector describing the point to clip. + * + * \return zero if outside view volume, or one if inside. + */ +static GLuint +viewclip_point_z( const GLfloat v[] ) +{ + if (v[2] > v[3] || v[2] < -v[3] ) { + return 0; + } + else { + return 1; + } +} + + +/** + * Clip a point against the user clipping planes. + * + * \param ctx GL context. + * \param v vertex vector describing the point to clip. + * + * \return zero if the point was clipped, or one otherwise. + */ +static GLuint +userclip_point( struct gl_context *ctx, const GLfloat v[] ) +{ + GLuint p; + + for (p = 0; p < ctx->Const.MaxClipPlanes; p++) { + if (ctx->Transform.ClipPlanesEnabled & (1 << p)) { + GLfloat dot = v[0] * ctx->Transform._ClipUserPlane[p][0] + + v[1] * ctx->Transform._ClipUserPlane[p][1] + + v[2] * ctx->Transform._ClipUserPlane[p][2] + + v[3] * ctx->Transform._ClipUserPlane[p][3]; + if (dot < 0.0F) { + return 0; + } + } + } + + return 1; +} + + +/** + * Compute lighting for the raster position. RGB modes computed. + * \param ctx the context + * \param vertex vertex location + * \param normal normal vector + * \param Rcolor returned color + * \param Rspec returned specular color (if separate specular enabled) + */ +static void +shade_rastpos(struct gl_context *ctx, + const GLfloat vertex[4], + const GLfloat normal[3], + GLfloat Rcolor[4], + GLfloat Rspec[4]) +{ + /*const*/ GLfloat (*base)[3] = ctx->Light._BaseColor; + const struct gl_light *light; + GLfloat diffuseColor[4], specularColor[4]; /* for RGB mode only */ + + _mesa_validate_all_lighting_tables( ctx ); + + COPY_3V(diffuseColor, base[0]); + diffuseColor[3] = CLAMP( + ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3], 0.0F, 1.0F ); + ASSIGN_4V(specularColor, 0.0, 0.0, 0.0, 1.0); + + foreach (light, &ctx->Light.EnabledList) { + GLfloat attenuation = 1.0; + GLfloat VP[3]; /* vector from vertex to light pos */ + GLfloat n_dot_VP; + GLfloat diffuseContrib[3], specularContrib[3]; + + if (!(light->_Flags & LIGHT_POSITIONAL)) { + /* light at infinity */ + COPY_3V(VP, light->_VP_inf_norm); + attenuation = light->_VP_inf_spot_attenuation; + } + else { + /* local/positional light */ + GLfloat d; + + /* VP = vector from vertex pos to light[i].pos */ + SUB_3V(VP, light->_Position, vertex); + /* d = length(VP) */ + d = (GLfloat) LEN_3FV( VP ); + if (d > 1.0e-6) { + /* normalize VP */ + GLfloat invd = 1.0F / d; + SELF_SCALE_SCALAR_3V(VP, invd); + } + + /* atti */ + attenuation = 1.0F / (light->ConstantAttenuation + d * + (light->LinearAttenuation + d * + light->QuadraticAttenuation)); + + if (light->_Flags & LIGHT_SPOT) { + GLfloat PV_dot_dir = - DOT3(VP, light->_NormSpotDirection); + + if (PV_dot_dir_CosCutoff) { + continue; + } + else { + double x = PV_dot_dir * (EXP_TABLE_SIZE-1); + int k = (int) x; + GLfloat spot = (GLfloat) (light->_SpotExpTable[k][0] + + (x-k)*light->_SpotExpTable[k][1]); + attenuation *= spot; + } + } + } + + if (attenuation < 1e-3) + continue; + + n_dot_VP = DOT3( normal, VP ); + + if (n_dot_VP < 0.0F) { + ACC_SCALE_SCALAR_3V(diffuseColor, attenuation, light->_MatAmbient[0]); + continue; + } + + /* Ambient + diffuse */ + COPY_3V(diffuseContrib, light->_MatAmbient[0]); + ACC_SCALE_SCALAR_3V(diffuseContrib, n_dot_VP, light->_MatDiffuse[0]); + + /* Specular */ + { + const GLfloat *h; + GLfloat n_dot_h; + + ASSIGN_3V(specularContrib, 0.0, 0.0, 0.0); + + if (ctx->Light.Model.LocalViewer) { + GLfloat v[3]; + COPY_3V(v, vertex); + NORMALIZE_3FV(v); + SUB_3V(VP, VP, v); + NORMALIZE_3FV(VP); + h = VP; + } + else if (light->_Flags & LIGHT_POSITIONAL) { + ACC_3V(VP, ctx->_EyeZDir); + NORMALIZE_3FV(VP); + h = VP; + } + else { + h = light->_h_inf_norm; + } + + n_dot_h = DOT3(normal, h); + + if (n_dot_h > 0.0F) { + GLfloat spec_coef; + GET_SHINE_TAB_ENTRY( ctx->_ShineTable[0], n_dot_h, spec_coef ); + + if (spec_coef > 1.0e-10) { + if (ctx->Light.Model.ColorControl==GL_SEPARATE_SPECULAR_COLOR) { + ACC_SCALE_SCALAR_3V( specularContrib, spec_coef, + light->_MatSpecular[0]); + } + else { + ACC_SCALE_SCALAR_3V( diffuseContrib, spec_coef, + light->_MatSpecular[0]); + } + } + } + } + + ACC_SCALE_SCALAR_3V( diffuseColor, attenuation, diffuseContrib ); + ACC_SCALE_SCALAR_3V( specularColor, attenuation, specularContrib ); + } + + Rcolor[0] = CLAMP(diffuseColor[0], 0.0F, 1.0F); + Rcolor[1] = CLAMP(diffuseColor[1], 0.0F, 1.0F); + Rcolor[2] = CLAMP(diffuseColor[2], 0.0F, 1.0F); + Rcolor[3] = CLAMP(diffuseColor[3], 0.0F, 1.0F); + Rspec[0] = CLAMP(specularColor[0], 0.0F, 1.0F); + Rspec[1] = CLAMP(specularColor[1], 0.0F, 1.0F); + Rspec[2] = CLAMP(specularColor[2], 0.0F, 1.0F); + Rspec[3] = CLAMP(specularColor[3], 0.0F, 1.0F); +} + + +/** + * Do texgen needed for glRasterPos. + * \param ctx rendering context + * \param vObj object-space vertex coordinate + * \param vEye eye-space vertex coordinate + * \param normal vertex normal + * \param unit texture unit number + * \param texcoord incoming texcoord and resulting texcoord + */ +static void +compute_texgen(struct gl_context *ctx, const GLfloat vObj[4], const GLfloat vEye[4], + const GLfloat normal[3], GLuint unit, GLfloat texcoord[4]) +{ + const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit]; + + /* always compute sphere map terms, just in case */ + GLfloat u[3], two_nu, rx, ry, rz, m, mInv; + COPY_3V(u, vEye); + NORMALIZE_3FV(u); + two_nu = 2.0F * DOT3(normal, u); + rx = u[0] - normal[0] * two_nu; + ry = u[1] - normal[1] * two_nu; + rz = u[2] - normal[2] * two_nu; + m = rx * rx + ry * ry + (rz + 1.0F) * (rz + 1.0F); + if (m > 0.0F) + mInv = 0.5F * _mesa_inv_sqrtf(m); + else + mInv = 0.0F; + + if (texUnit->TexGenEnabled & S_BIT) { + switch (texUnit->GenS.Mode) { + case GL_OBJECT_LINEAR: + texcoord[0] = DOT4(vObj, texUnit->GenS.ObjectPlane); + break; + case GL_EYE_LINEAR: + texcoord[0] = DOT4(vEye, texUnit->GenS.EyePlane); + break; + case GL_SPHERE_MAP: + texcoord[0] = rx * mInv + 0.5F; + break; + case GL_REFLECTION_MAP: + texcoord[0] = rx; + break; + case GL_NORMAL_MAP: + texcoord[0] = normal[0]; + break; + default: + _mesa_problem(ctx, "Bad S texgen in compute_texgen()"); + return; + } + } + + if (texUnit->TexGenEnabled & T_BIT) { + switch (texUnit->GenT.Mode) { + case GL_OBJECT_LINEAR: + texcoord[1] = DOT4(vObj, texUnit->GenT.ObjectPlane); + break; + case GL_EYE_LINEAR: + texcoord[1] = DOT4(vEye, texUnit->GenT.EyePlane); + break; + case GL_SPHERE_MAP: + texcoord[1] = ry * mInv + 0.5F; + break; + case GL_REFLECTION_MAP: + texcoord[1] = ry; + break; + case GL_NORMAL_MAP: + texcoord[1] = normal[1]; + break; + default: + _mesa_problem(ctx, "Bad T texgen in compute_texgen()"); + return; + } + } + + if (texUnit->TexGenEnabled & R_BIT) { + switch (texUnit->GenR.Mode) { + case GL_OBJECT_LINEAR: + texcoord[2] = DOT4(vObj, texUnit->GenR.ObjectPlane); + break; + case GL_EYE_LINEAR: + texcoord[2] = DOT4(vEye, texUnit->GenR.EyePlane); + break; + case GL_REFLECTION_MAP: + texcoord[2] = rz; + break; + case GL_NORMAL_MAP: + texcoord[2] = normal[2]; + break; + default: + _mesa_problem(ctx, "Bad R texgen in compute_texgen()"); + return; + } + } + + if (texUnit->TexGenEnabled & Q_BIT) { + switch (texUnit->GenQ.Mode) { + case GL_OBJECT_LINEAR: + texcoord[3] = DOT4(vObj, texUnit->GenQ.ObjectPlane); + break; + case GL_EYE_LINEAR: + texcoord[3] = DOT4(vEye, texUnit->GenQ.EyePlane); + break; + default: + _mesa_problem(ctx, "Bad Q texgen in compute_texgen()"); + return; + } + } +} + + +/** + * glRasterPos transformation. Typically called via ctx->Driver.RasterPos(). + * XXX some of this code (such as viewport xform, clip testing and setting + * of ctx->Current.Raster* fields) could get lifted up into the + * main/rasterpos.c code. + * + * \param vObj vertex position in object space + */ +void +_tnl_RasterPos(struct gl_context *ctx, const GLfloat vObj[4]) +{ + if (ctx->VertexProgram._Enabled) { + /* XXX implement this */ + _mesa_problem(ctx, "Vertex programs not implemented for glRasterPos"); + return; + } + else { + GLfloat eye[4], clip[4], ndc[3], d; + GLfloat *norm, eyenorm[3]; + GLfloat *objnorm = ctx->Current.Attrib[VERT_ATTRIB_NORMAL]; + + /* apply modelview matrix: eye = MV * obj */ + TRANSFORM_POINT( eye, ctx->ModelviewMatrixStack.Top->m, vObj ); + /* apply projection matrix: clip = Proj * eye */ + TRANSFORM_POINT( clip, ctx->ProjectionMatrixStack.Top->m, eye ); + + /* clip to view volume. */ + if (!ctx->Transform.DepthClamp) { + if (viewclip_point_z(clip) == 0) { + ctx->Current.RasterPosValid = GL_FALSE; + return; + } + } + if (!ctx->Transform.RasterPositionUnclipped) { + if (viewclip_point_xy(clip) == 0) { + ctx->Current.RasterPosValid = GL_FALSE; + return; + } + } + + /* clip to user clipping planes */ + if (ctx->Transform.ClipPlanesEnabled && !userclip_point(ctx, clip)) { + ctx->Current.RasterPosValid = GL_FALSE; + return; + } + + /* ndc = clip / W */ + d = (clip[3] == 0.0F) ? 1.0F : 1.0F / clip[3]; + ndc[0] = clip[0] * d; + ndc[1] = clip[1] * d; + ndc[2] = clip[2] * d; + /* wincoord = viewport_mapping(ndc) */ + ctx->Current.RasterPos[0] = (ndc[0] * ctx->Viewport._WindowMap.m[MAT_SX] + + ctx->Viewport._WindowMap.m[MAT_TX]); + ctx->Current.RasterPos[1] = (ndc[1] * ctx->Viewport._WindowMap.m[MAT_SY] + + ctx->Viewport._WindowMap.m[MAT_TY]); + ctx->Current.RasterPos[2] = (ndc[2] * ctx->Viewport._WindowMap.m[MAT_SZ] + + ctx->Viewport._WindowMap.m[MAT_TZ]) + / ctx->DrawBuffer->_DepthMaxF; + ctx->Current.RasterPos[3] = clip[3]; + + if (ctx->Transform.DepthClamp) { + ctx->Current.RasterPos[3] = CLAMP(ctx->Current.RasterPos[3], + ctx->Viewport.Near, + ctx->Viewport.Far); + } + + /* compute raster distance */ + if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT) + ctx->Current.RasterDistance = ctx->Current.Attrib[VERT_ATTRIB_FOG][0]; + else + ctx->Current.RasterDistance = + SQRTF( eye[0]*eye[0] + eye[1]*eye[1] + eye[2]*eye[2] ); + + /* compute transformed normal vector (for lighting or texgen) */ + if (ctx->_NeedEyeCoords) { + const GLfloat *inv = ctx->ModelviewMatrixStack.Top->inv; + TRANSFORM_NORMAL( eyenorm, objnorm, inv ); + norm = eyenorm; + } + else { + norm = objnorm; + } + + /* update raster color */ + if (ctx->Light.Enabled) { + /* lighting */ + shade_rastpos( ctx, vObj, norm, + ctx->Current.RasterColor, + ctx->Current.RasterSecondaryColor ); + } + else { + /* use current color */ + COPY_4FV(ctx->Current.RasterColor, + ctx->Current.Attrib[VERT_ATTRIB_COLOR0]); + COPY_4FV(ctx->Current.RasterSecondaryColor, + ctx->Current.Attrib[VERT_ATTRIB_COLOR1]); + } + + /* texture coords */ + { + GLuint u; + for (u = 0; u < ctx->Const.MaxTextureCoordUnits; u++) { + GLfloat tc[4]; + COPY_4V(tc, ctx->Current.Attrib[VERT_ATTRIB_TEX0 + u]); + if (ctx->Texture.Unit[u].TexGenEnabled) { + compute_texgen(ctx, vObj, eye, norm, u, tc); + } + TRANSFORM_POINT(ctx->Current.RasterTexCoords[u], + ctx->TextureMatrixStack[u].Top->m, tc); + } + } + + ctx->Current.RasterPosValid = GL_TRUE; + } + + if (ctx->RenderMode == GL_SELECT) { + _mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] ); + } +} -- cgit v1.2.3