327 lines
11 KiB
C
327 lines
11 KiB
C
/**************************************************************************
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*
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* Copyright 2007 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/*
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* Authors:
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* Keith Whitwell <keithw@vmware.com>
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*/
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#include "main/macros.h"
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#include "main/framebuffer.h"
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#include "main/state.h"
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#include "st_context.h"
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#include "st_atom.h"
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#include "st_debug.h"
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#include "st_program.h"
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#include "st_util.h"
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#include "pipe/p_context.h"
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#include "pipe/p_defines.h"
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#include "cso_cache/cso_context.h"
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static GLuint
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translate_fill(GLenum mode)
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{
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switch (mode) {
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case GL_POINT:
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return PIPE_POLYGON_MODE_POINT;
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case GL_LINE:
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return PIPE_POLYGON_MODE_LINE;
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case GL_FILL:
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return PIPE_POLYGON_MODE_FILL;
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case GL_FILL_RECTANGLE_NV:
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return PIPE_POLYGON_MODE_FILL_RECTANGLE;
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default:
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assert(0);
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return 0;
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}
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}
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void
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st_update_rasterizer(struct st_context *st)
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{
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struct gl_context *ctx = st->ctx;
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struct pipe_rasterizer_state *raster = &st->state.rasterizer;
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const struct gl_program *fragProg = ctx->FragmentProgram._Current;
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memset(raster, 0, sizeof(*raster));
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/* _NEW_POLYGON, _NEW_BUFFERS
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*/
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{
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raster->front_ccw = (ctx->Polygon.FrontFace == GL_CCW);
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/* _NEW_TRANSFORM */
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if (ctx->Transform.ClipOrigin == GL_UPPER_LEFT) {
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raster->front_ccw ^= 1;
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}
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/*
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* Gallium's surfaces are Y=0=TOP orientation. OpenGL is the
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* opposite. Window system surfaces are Y=0=TOP. Mesa's FBOs
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* must match OpenGL conventions so FBOs use Y=0=BOTTOM. In that
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* case, we must invert Y and flip the notion of front vs. back.
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*/
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if (st->state.fb_orientation == Y_0_BOTTOM) {
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/* Drawing to an FBO. The viewport will be inverted. */
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raster->front_ccw ^= 1;
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}
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}
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/* _NEW_LIGHT_STATE */
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raster->flatshade = !st->lower_flatshade &&
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ctx->Light.ShadeModel == GL_FLAT;
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raster->flatshade_first = ctx->Light.ProvokingVertex ==
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GL_FIRST_VERTEX_CONVENTION_EXT;
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/* _NEW_LIGHT_STATE | _NEW_PROGRAM */
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if (!st->lower_two_sided_color)
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raster->light_twoside = _mesa_vertex_program_two_side_enabled(ctx);
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/*_NEW_LIGHT_STATE | _NEW_BUFFERS */
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raster->clamp_vertex_color = !st->clamp_vert_color_in_shader &&
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ctx->Light._ClampVertexColor;
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/* _NEW_POLYGON
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*/
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if (ctx->Polygon.CullFlag) {
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switch (ctx->Polygon.CullFaceMode) {
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case GL_FRONT:
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raster->cull_face = PIPE_FACE_FRONT;
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break;
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case GL_BACK:
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raster->cull_face = PIPE_FACE_BACK;
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break;
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case GL_FRONT_AND_BACK:
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raster->cull_face = PIPE_FACE_FRONT_AND_BACK;
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break;
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}
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}
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else {
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raster->cull_face = PIPE_FACE_NONE;
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}
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/* _NEW_POLYGON
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*/
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{
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if (ST_DEBUG & DEBUG_WIREFRAME) {
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raster->fill_front = PIPE_POLYGON_MODE_LINE;
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raster->fill_back = PIPE_POLYGON_MODE_LINE;
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}
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else {
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raster->fill_front = translate_fill(ctx->Polygon.FrontMode);
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raster->fill_back = translate_fill(ctx->Polygon.BackMode);
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}
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/* Simplify when culling is active:
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*/
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if (raster->cull_face & PIPE_FACE_FRONT) {
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raster->fill_front = raster->fill_back;
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}
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if (raster->cull_face & PIPE_FACE_BACK) {
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raster->fill_back = raster->fill_front;
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}
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}
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/* _NEW_POLYGON
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*/
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if (ctx->Polygon.OffsetPoint ||
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ctx->Polygon.OffsetLine ||
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ctx->Polygon.OffsetFill) {
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raster->offset_point = ctx->Polygon.OffsetPoint;
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raster->offset_line = ctx->Polygon.OffsetLine;
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raster->offset_tri = ctx->Polygon.OffsetFill;
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raster->offset_units = ctx->Polygon.OffsetUnits;
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raster->offset_scale = ctx->Polygon.OffsetFactor;
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raster->offset_clamp = ctx->Polygon.OffsetClamp;
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}
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raster->poly_stipple_enable = ctx->Polygon.StippleFlag;
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/* Multisampling disables point, line, and polygon smoothing.
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*
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* GL_ARB_multisample says:
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*
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* "If MULTISAMPLE_ARB is enabled, and SAMPLE_BUFFERS_ARB is a value of
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* one, then points are rasterized using the following algorithm,
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* regardless of whether point antialiasing (POINT_SMOOTH) is enabled"
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*
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* "If MULTISAMPLE_ARB is enabled, and SAMPLE_BUFFERS_ARB is a value of
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* one, then lines are rasterized using the following algorithm,
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* regardless of whether line antialiasing (LINE_SMOOTH) is enabled"
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*
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* "If MULTISAMPLE_ARB is enabled, and SAMPLE_BUFFERS_ARB is a value of
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* one, then polygons are rasterized using the following algorithm,
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* regardless of whether polygon antialiasing (POLYGON_SMOOTH) is
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* enabled"
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*/
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/* _NEW_MULTISAMPLE */
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bool multisample = _mesa_is_multisample_enabled(ctx);
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raster->multisample = multisample;
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/* _NEW_POLYGON | _NEW_MULTISAMPLE */
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raster->poly_smooth = !multisample && ctx->Polygon.SmoothFlag;
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/* _NEW_POINT
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*/
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raster->point_size = ctx->Point.Size;
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/* _NEW_POINT | _NEW_MULTISAMPLE */
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raster->point_smooth = !multisample && !ctx->Point.PointSprite &&
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ctx->Point.SmoothFlag;
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/* _NEW_POINT | _NEW_PROGRAM
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*/
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if (ctx->Point.PointSprite) {
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/* origin */
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if ((ctx->Point.SpriteOrigin == GL_UPPER_LEFT) ^
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(st->state.fb_orientation == Y_0_BOTTOM))
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raster->sprite_coord_mode = PIPE_SPRITE_COORD_UPPER_LEFT;
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else
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raster->sprite_coord_mode = PIPE_SPRITE_COORD_LOWER_LEFT;
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/* Coord replacement flags. If bit 'k' is set that means
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* that we need to replace GENERIC[k] attrib with an automatically
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* computed texture coord.
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*/
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raster->sprite_coord_enable = ctx->Point.CoordReplace &
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((1u << MAX_TEXTURE_COORD_UNITS) - 1);
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if (!st->needs_texcoord_semantic &&
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fragProg->info.inputs_read & VARYING_BIT_PNTC) {
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raster->sprite_coord_enable |=
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1 << st_get_generic_varying_index(st, VARYING_SLOT_PNTC);
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}
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raster->point_quad_rasterization = 1;
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raster->point_tri_clip = st->ctx->API == API_OPENGLES2;
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}
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/* ST_NEW_VERTEX_PROGRAM
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*/
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raster->point_size_per_vertex = st_point_size_per_vertex(ctx);
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if (!raster->point_size_per_vertex) {
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/* clamp size now */
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raster->point_size = CLAMP(ctx->Point.Size,
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ctx->Point.MinSize,
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ctx->Point.MaxSize);
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}
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/* _NEW_LINE | _NEW_MULTISAMPLE
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*/
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if (!multisample && ctx->Line.SmoothFlag) {
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raster->line_smooth = 1;
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raster->line_width = CLAMP(ctx->Line.Width,
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ctx->Const.MinLineWidthAA,
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ctx->Const.MaxLineWidthAA);
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}
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else {
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raster->line_width = CLAMP(ctx->Line.Width,
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ctx->Const.MinLineWidth,
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ctx->Const.MaxLineWidth);
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}
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raster->line_rectangular = multisample || ctx->Line.SmoothFlag;
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/* When the pattern is all 1's, it means line stippling is disabled */
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raster->line_stipple_enable = ctx->Line.StippleFlag && ctx->Line.StipplePattern != 0xffff;
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raster->line_stipple_pattern = ctx->Line.StipplePattern;
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/* GL stipple factor is in [1,256], remap to [0, 255] here */
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raster->line_stipple_factor = ctx->Line.StippleFactor - 1;
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/* _NEW_MULTISAMPLE | _NEW_BUFFERS */
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raster->force_persample_interp =
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!st->force_persample_in_shader &&
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raster->multisample &&
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ctx->Multisample.SampleShading &&
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ctx->Multisample.MinSampleShadingValue *
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_mesa_geometric_samples(ctx->DrawBuffer) > 1;
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/* _NEW_SCISSOR */
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raster->scissor = !!ctx->Scissor.EnableFlags;
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/* gl_driver_flags::NewFragClamp */
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raster->clamp_fragment_color = !st->clamp_frag_color_in_shader &&
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ctx->Color._ClampFragmentColor;
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raster->half_pixel_center = 1;
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if (st->state.fb_orientation == Y_0_TOP)
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raster->bottom_edge_rule = 1;
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/* _NEW_TRANSFORM */
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if (ctx->Transform.ClipOrigin == GL_UPPER_LEFT)
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raster->bottom_edge_rule ^= 1;
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/* ST_NEW_RASTERIZER */
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raster->rasterizer_discard = ctx->RasterDiscard;
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if (ctx->TileRasterOrderFixed) {
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raster->tile_raster_order_fixed = true;
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raster->tile_raster_order_increasing_x = ctx->TileRasterOrderIncreasingX;
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raster->tile_raster_order_increasing_y = ctx->TileRasterOrderIncreasingY;
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}
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if (st->edgeflag_culls_prims) {
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/* All edge flags are FALSE. Cull the affected faces. */
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if (raster->fill_front != PIPE_POLYGON_MODE_FILL)
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raster->cull_face |= PIPE_FACE_FRONT;
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if (raster->fill_back != PIPE_POLYGON_MODE_FILL)
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raster->cull_face |= PIPE_FACE_BACK;
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}
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/* _NEW_TRANSFORM */
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raster->depth_clip_near = !ctx->Transform.DepthClampNear;
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raster->depth_clip_far = !ctx->Transform.DepthClampFar;
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raster->depth_clamp = !raster->depth_clip_far;
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/* this should be different for GL vs GLES but without NV_depth_buffer_float
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it doesn't matter, and likely virgl would need fixes to deal with it. */
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raster->unclamped_fragment_depth_values = false;
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raster->clip_plane_enable = ctx->Transform.ClipPlanesEnabled;
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raster->clip_halfz = (ctx->Transform.ClipDepthMode == GL_ZERO_TO_ONE);
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/* ST_NEW_RASTERIZER */
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if (ctx->ConservativeRasterization) {
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if (ctx->ConservativeRasterMode == GL_CONSERVATIVE_RASTER_MODE_POST_SNAP_NV)
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raster->conservative_raster_mode = PIPE_CONSERVATIVE_RASTER_POST_SNAP;
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else
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raster->conservative_raster_mode = PIPE_CONSERVATIVE_RASTER_PRE_SNAP;
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} else if (ctx->IntelConservativeRasterization) {
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raster->conservative_raster_mode = PIPE_CONSERVATIVE_RASTER_POST_SNAP;
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} else {
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raster->conservative_raster_mode = PIPE_CONSERVATIVE_RASTER_OFF;
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}
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raster->conservative_raster_dilate = ctx->ConservativeRasterDilate;
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raster->subpixel_precision_x = ctx->SubpixelPrecisionBias[0];
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raster->subpixel_precision_y = ctx->SubpixelPrecisionBias[1];
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cso_set_rasterizer(st->cso_context, raster);
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}
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