115 lines
3.4 KiB
C
115 lines
3.4 KiB
C
/**************************************************************************
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*
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* Copyright 2019 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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* Miscellantous state tracker utility functions, macros.
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*/
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#ifndef ST_UTIL
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#define ST_UTIL
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#include "state_tracker/st_context.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** For drawing quads for glClear, glDraw/CopyPixels, glBitmap, etc. */
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struct st_util_vertex
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{
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float x, y, z;
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float r, g, b, a;
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float s, t;
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};
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/* Invalidate the readpixels cache to ensure we don't read stale data.
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*/
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static inline void
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st_invalidate_readpix_cache(struct st_context *st)
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{
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if (unlikely(st->readpix_cache.src)) {
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pipe_resource_reference(&st->readpix_cache.src, NULL);
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pipe_resource_reference(&st->readpix_cache.cache, NULL);
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}
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}
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static inline bool
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st_user_clip_planes_enabled(struct gl_context *ctx)
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{
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return (ctx->API == API_OPENGL_COMPAT ||
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ctx->API == API_OPENGLES) && /* only ES 1.x */
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ctx->Transform.ClipPlanesEnabled;
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}
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static inline bool
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st_point_size_per_vertex(struct gl_context *ctx)
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{
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const struct gl_program *vertProg = ctx->VertexProgram._Current;
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if (vertProg) {
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if (vertProg->Id == 0) {
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if (vertProg->info.outputs_written &
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BITFIELD64_BIT(VARYING_SLOT_PSIZ)) {
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/* generated program which emits point size */
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return true;
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}
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}
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else if (ctx->API != API_OPENGLES2) {
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/* PointSizeEnabled is always set in ES2 contexts */
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return ctx->VertexProgram.PointSizeEnabled;
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}
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else {
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/* ST_NEW_TESSEVAL_PROGRAM | ST_NEW_GEOMETRY_PROGRAM */
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/* We have to check the last bound stage and see if it writes psize */
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struct gl_program *last = NULL;
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if (ctx->GeometryProgram._Current)
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last = ctx->GeometryProgram._Current;
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else if (ctx->TessEvalProgram._Current)
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last = ctx->TessEvalProgram._Current;
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else if (ctx->VertexProgram._Current)
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last = ctx->VertexProgram._Current;
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if (last)
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return !!(last->info.outputs_written &
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BITFIELD64_BIT(VARYING_SLOT_PSIZ));
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}
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}
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return false;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* ST_UTIL */
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