From f4092abdf94af6a99aff944d6264bc1284e8bdd4 Mon Sep 17 00:00:00 2001 From: Reinhard Tartler Date: Mon, 10 Oct 2011 17:43:39 +0200 Subject: Imported nx-X11-3.1.0-1.tar.gz Summary: Imported nx-X11-3.1.0-1.tar.gz Keywords: Imported nx-X11-3.1.0-1.tar.gz into Git repository --- .../extras/Mesa/src/mesa/swrast_setup/ss_tritmp.h | 222 +++++++++++++++++++++ 1 file changed, 222 insertions(+) create mode 100644 nx-X11/extras/Mesa/src/mesa/swrast_setup/ss_tritmp.h (limited to 'nx-X11/extras/Mesa/src/mesa/swrast_setup/ss_tritmp.h') diff --git a/nx-X11/extras/Mesa/src/mesa/swrast_setup/ss_tritmp.h b/nx-X11/extras/Mesa/src/mesa/swrast_setup/ss_tritmp.h new file mode 100644 index 000000000..61c9b2817 --- /dev/null +++ b/nx-X11/extras/Mesa/src/mesa/swrast_setup/ss_tritmp.h @@ -0,0 +1,222 @@ +/* + * Mesa 3-D graphics library + * Version: 6.1 + * + * Copyright (C) 1999-2004 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. + * + * Authors: + * Keith Whitwell + */ + + +static void TAG(triangle)(GLcontext *ctx, GLuint e0, GLuint e1, GLuint e2 ) +{ + struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb; + SWvertex *verts = SWSETUP_CONTEXT(ctx)->verts; + SWvertex *v[3]; + GLfloat z[3]; + GLfloat offset; + GLenum mode = GL_FILL; + GLuint facing = 0; + GLchan saved_color[3][4]; + GLchan saved_spec[3][4]; + GLfloat saved_index[3]; + + v[0] = &verts[e0]; + v[1] = &verts[e1]; + v[2] = &verts[e2]; + + + if (IND & (SS_TWOSIDE_BIT | SS_OFFSET_BIT | SS_UNFILLED_BIT)) + { + GLfloat ex = v[0]->win[0] - v[2]->win[0]; + GLfloat ey = v[0]->win[1] - v[2]->win[1]; + GLfloat fx = v[1]->win[0] - v[2]->win[0]; + GLfloat fy = v[1]->win[1] - v[2]->win[1]; + GLfloat cc = ex*fy - ey*fx; + + if (IND & (SS_TWOSIDE_BIT | SS_UNFILLED_BIT)) + { + facing = (cc < 0.0) ^ ctx->Polygon._FrontBit; + if (ctx->Stencil.TestTwoSide) + ctx->_Facing = facing; /* for 2-sided stencil test */ + + if (IND & SS_UNFILLED_BIT) + mode = facing ? ctx->Polygon.BackMode : ctx->Polygon.FrontMode; + + if (facing == 1) { + if (IND & SS_TWOSIDE_BIT) { + if (IND & SS_RGBA_BIT) { + GLfloat (*vbcolor)[4] = VB->ColorPtr[1]->data; + + COPY_CHAN4(saved_color[0], v[0]->color); + COPY_CHAN4(saved_color[1], v[1]->color); + COPY_CHAN4(saved_color[2], v[2]->color); + + if (VB->ColorPtr[1]->stride) { + SS_COLOR(v[0]->color, vbcolor[e0]); + SS_COLOR(v[1]->color, vbcolor[e1]); + SS_COLOR(v[2]->color, vbcolor[e2]); + } + else { + SS_COLOR(v[0]->color, vbcolor[0]); + SS_COLOR(v[1]->color, vbcolor[0]); + SS_COLOR(v[2]->color, vbcolor[0]); + } + + if (VB->SecondaryColorPtr[1]) { + GLfloat (*vbspec)[4] = VB->SecondaryColorPtr[1]->data; + + COPY_CHAN4(saved_spec[0], v[0]->specular); + COPY_CHAN4(saved_spec[1], v[1]->specular); + COPY_CHAN4(saved_spec[2], v[2]->specular); + + if (VB->SecondaryColorPtr[1]->stride) { + SS_SPEC(v[0]->specular, vbspec[e0]); + SS_SPEC(v[1]->specular, vbspec[e1]); + SS_SPEC(v[2]->specular, vbspec[e2]); + } + else { + SS_SPEC(v[0]->specular, vbspec[0]); + SS_SPEC(v[1]->specular, vbspec[0]); + SS_SPEC(v[2]->specular, vbspec[0]); + } + } + } else { + GLfloat *vbindex = (GLfloat *)VB->IndexPtr[1]->data; + saved_index[0] = v[0]->index; + saved_index[1] = v[1]->index; + saved_index[2] = v[2]->index; + + SS_IND(v[0]->index, (GLuint) vbindex[e0]); + SS_IND(v[1]->index, (GLuint) vbindex[e1]); + SS_IND(v[2]->index, (GLuint) vbindex[e2]); + } + } + } + } + + if (IND & SS_OFFSET_BIT) + { + offset = ctx->Polygon.OffsetUnits * ctx->DrawBuffer->_MRD; + z[0] = v[0]->win[2]; + z[1] = v[1]->win[2]; + z[2] = v[2]->win[2]; + if (cc * cc > 1e-16) { + const GLfloat ez = z[0] - z[2]; + const GLfloat fz = z[1] - z[2]; + const GLfloat oneOverArea = 1.0F / cc; + const GLfloat dzdx = FABSF((ey * fz - ez * fy) * oneOverArea); + const GLfloat dzdy = FABSF((ez * fx - ex * fz) * oneOverArea); + offset += MAX2(dzdx, dzdy) * ctx->Polygon.OffsetFactor; + /* Unfortunately, we need to clamp to prevent negative Zs below. + * Technically, we should do the clamping per-fragment. + */ + offset = MAX2(offset, -v[0]->win[2]); + offset = MAX2(offset, -v[1]->win[2]); + offset = MAX2(offset, -v[2]->win[2]); + } + } + } + + if (mode == GL_POINT) { + if ((IND & SS_OFFSET_BIT) && ctx->Polygon.OffsetPoint) { + v[0]->win[2] += offset; + v[1]->win[2] += offset; + v[2]->win[2] += offset; + } + _swsetup_render_point_tri( ctx, e0, e1, e2, facing ); + } else if (mode == GL_LINE) { + if ((IND & SS_OFFSET_BIT) && ctx->Polygon.OffsetLine) { + v[0]->win[2] += offset; + v[1]->win[2] += offset; + v[2]->win[2] += offset; + } + _swsetup_render_line_tri( ctx, e0, e1, e2, facing ); + } else { + if ((IND & SS_OFFSET_BIT) && ctx->Polygon.OffsetFill) { + v[0]->win[2] += offset; + v[1]->win[2] += offset; + v[2]->win[2] += offset; + } + _swrast_Triangle( ctx, v[0], v[1], v[2] ); + } + + if (IND & SS_OFFSET_BIT) { + v[0]->win[2] = z[0]; + v[1]->win[2] = z[1]; + v[2]->win[2] = z[2]; + } + + if (IND & SS_TWOSIDE_BIT) { + if (facing == 1) { + if (IND & SS_RGBA_BIT) { + COPY_CHAN4(v[0]->color, saved_color[0]); + COPY_CHAN4(v[1]->color, saved_color[1]); + COPY_CHAN4(v[2]->color, saved_color[2]); + if (VB->SecondaryColorPtr[1]) { + COPY_CHAN4(v[0]->specular, saved_spec[0]); + COPY_CHAN4(v[1]->specular, saved_spec[1]); + COPY_CHAN4(v[2]->specular, saved_spec[2]); + } + } else { + v[0]->index = saved_index[0]; + v[1]->index = saved_index[1]; + v[2]->index = saved_index[2]; + } + } + } +} + + + +/* Need to fixup edgeflags when decomposing to triangles: + */ +static void TAG(quadfunc)( GLcontext *ctx, GLuint v0, + GLuint v1, GLuint v2, GLuint v3 ) +{ + if (IND & SS_UNFILLED_BIT) { + struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb; + GLubyte ef1 = VB->EdgeFlag[v1]; + GLubyte ef3 = VB->EdgeFlag[v3]; + VB->EdgeFlag[v1] = 0; + TAG(triangle)( ctx, v0, v1, v3 ); + VB->EdgeFlag[v1] = ef1; + VB->EdgeFlag[v3] = 0; + TAG(triangle)( ctx, v1, v2, v3 ); + VB->EdgeFlag[v3] = ef3; + } else { + TAG(triangle)( ctx, v0, v1, v3 ); + TAG(triangle)( ctx, v1, v2, v3 ); + } +} + + + + +static void TAG(init)( void ) +{ + tri_tab[IND] = TAG(triangle); + quad_tab[IND] = TAG(quadfunc); +} + + +#undef IND +#undef TAG -- cgit v1.2.3