1250 lines
41 KiB
C
1250 lines
41 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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* Binning code for triangles
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*/
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#include "util/u_math.h"
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#include "util/u_memory.h"
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#include "util/u_rect.h"
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#include "util/u_sse.h"
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#include "lp_perf.h"
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#include "lp_setup_context.h"
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#include "lp_rast.h"
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#include "lp_state_fs.h"
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#include "lp_state_setup.h"
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#include "lp_context.h"
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#include <inttypes.h>
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#if defined(PIPE_ARCH_SSE)
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#include <emmintrin.h>
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#elif defined(_ARCH_PWR8) && UTIL_ARCH_LITTLE_ENDIAN
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#include <altivec.h>
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#include "util/u_pwr8.h"
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#endif
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#if !defined(PIPE_ARCH_SSE)
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static inline int
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subpixel_snap(float a)
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{
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return util_iround(FIXED_ONE * a);
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}
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#endif
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/* Position and area in fixed point coordinates */
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struct fixed_position {
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int32_t x[4];
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int32_t y[4];
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int32_t dx01;
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int32_t dy01;
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int32_t dx20;
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int32_t dy20;
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};
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/**
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* Alloc space for a new triangle plus the input.a0/dadx/dady arrays
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* immediately after it.
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* The memory is allocated from the per-scene pool, not per-tile.
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* \param tri_size returns number of bytes allocated
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* \param num_inputs number of fragment shader inputs
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* \return pointer to triangle space
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*/
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struct lp_rast_triangle *
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lp_setup_alloc_triangle(struct lp_scene *scene,
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unsigned nr_inputs,
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unsigned nr_planes,
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unsigned *tri_size)
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{
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// add 1 for XYZW position
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unsigned input_array_sz = (nr_inputs + 1) * sizeof(float[4]);
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unsigned plane_sz = nr_planes * sizeof(struct lp_rast_plane);
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STATIC_ASSERT(sizeof(struct lp_rast_plane) % 8 == 0);
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*tri_size = (sizeof(struct lp_rast_triangle) +
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3 * input_array_sz + // 3 = da + dadx + dady
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plane_sz);
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struct lp_rast_triangle *tri = lp_scene_alloc_aligned(scene, *tri_size, 16);
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if (!tri)
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return NULL;
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tri->inputs.stride = input_array_sz;
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{
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ASSERTED char *a = (char *)tri;
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ASSERTED char *b = (char *)&GET_PLANES(tri)[nr_planes];
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assert(b - a == *tri_size);
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}
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return tri;
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}
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void
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lp_setup_print_vertex(struct lp_setup_context *setup,
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const char *name,
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const float (*v)[4])
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{
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const struct lp_setup_variant_key *key = &setup->setup.variant->key;
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debug_printf(" wpos (%s[0]) xyzw %f %f %f %f\n",
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name,
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v[0][0], v[0][1], v[0][2], v[0][3]);
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for (int i = 0; i < key->num_inputs; i++) {
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const float *in = v[key->inputs[i].src_index];
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debug_printf(" in[%d] (%s[%d]) %s%s%s%s ",
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i,
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name, key->inputs[i].src_index,
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(key->inputs[i].usage_mask & 0x1) ? "x" : " ",
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(key->inputs[i].usage_mask & 0x2) ? "y" : " ",
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(key->inputs[i].usage_mask & 0x4) ? "z" : " ",
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(key->inputs[i].usage_mask & 0x8) ? "w" : " ");
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for (int j = 0; j < 4; j++)
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if (key->inputs[i].usage_mask & (1<<j))
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debug_printf("%.5f ", in[j]);
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debug_printf("\n");
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}
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}
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/**
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* Print triangle vertex attribs (for debug).
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*/
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void
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lp_setup_print_triangle(struct lp_setup_context *setup,
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const float (*v0)[4],
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const float (*v1)[4],
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const float (*v2)[4])
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{
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debug_printf("triangle\n");
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{
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const float ex = v0[0][0] - v2[0][0];
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const float ey = v0[0][1] - v2[0][1];
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const float fx = v1[0][0] - v2[0][0];
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const float fy = v1[0][1] - v2[0][1];
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/* det = cross(e,f).z */
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const float det = ex * fy - ey * fx;
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if (det < 0.0f)
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debug_printf(" - ccw\n");
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else if (det > 0.0f)
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debug_printf(" - cw\n");
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else
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debug_printf(" - zero area\n");
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}
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lp_setup_print_vertex(setup, "v0", v0);
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lp_setup_print_vertex(setup, "v1", v1);
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lp_setup_print_vertex(setup, "v2", v2);
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}
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#define MAX_PLANES 8
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static unsigned
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lp_rast_tri_tab[MAX_PLANES+1] = {
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0, /* should be impossible */
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LP_RAST_OP_TRIANGLE_1,
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LP_RAST_OP_TRIANGLE_2,
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LP_RAST_OP_TRIANGLE_3,
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LP_RAST_OP_TRIANGLE_4,
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LP_RAST_OP_TRIANGLE_5,
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LP_RAST_OP_TRIANGLE_6,
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LP_RAST_OP_TRIANGLE_7,
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LP_RAST_OP_TRIANGLE_8
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};
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static unsigned
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lp_rast_32_tri_tab[MAX_PLANES+1] = {
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0, /* should be impossible */
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LP_RAST_OP_TRIANGLE_32_1,
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LP_RAST_OP_TRIANGLE_32_2,
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LP_RAST_OP_TRIANGLE_32_3,
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LP_RAST_OP_TRIANGLE_32_4,
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LP_RAST_OP_TRIANGLE_32_5,
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LP_RAST_OP_TRIANGLE_32_6,
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LP_RAST_OP_TRIANGLE_32_7,
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LP_RAST_OP_TRIANGLE_32_8
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};
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static unsigned
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lp_rast_ms_tri_tab[MAX_PLANES+1] = {
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0, /* should be impossible */
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LP_RAST_OP_MS_TRIANGLE_1,
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LP_RAST_OP_MS_TRIANGLE_2,
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LP_RAST_OP_MS_TRIANGLE_3,
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LP_RAST_OP_MS_TRIANGLE_4,
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LP_RAST_OP_MS_TRIANGLE_5,
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LP_RAST_OP_MS_TRIANGLE_6,
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LP_RAST_OP_MS_TRIANGLE_7,
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LP_RAST_OP_MS_TRIANGLE_8
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};
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/*
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* Detect big primitives drawn with an alpha == 1.0.
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*
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* This is used when simulating anti-aliasing primitives in shaders, e.g.,
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* when drawing the windows client area in Aero's flip-3d effect.
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*/
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static boolean
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check_opaque(const struct lp_setup_context *setup,
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const float (*v1)[4],
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const float (*v2)[4],
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const float (*v3)[4])
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{
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const struct lp_fragment_shader_variant *variant =
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setup->fs.current.variant;
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if (variant->opaque)
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return TRUE;
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if (!variant->potentially_opaque)
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return FALSE;
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const struct lp_tgsi_channel_info *alpha_info = &variant->shader->info.cbuf[0][3];
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if (alpha_info->file == TGSI_FILE_CONSTANT) {
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const float *constants = setup->fs.current.jit_context.constants[0];
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float alpha = constants[alpha_info->u.index*4 +
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alpha_info->swizzle];
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return alpha == 1.0f;
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}
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if (alpha_info->file == TGSI_FILE_INPUT) {
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return (v1[1 + alpha_info->u.index][alpha_info->swizzle] == 1.0f &&
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v2[1 + alpha_info->u.index][alpha_info->swizzle] == 1.0f &&
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v3[1 + alpha_info->u.index][alpha_info->swizzle] == 1.0f);
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}
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return FALSE;
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}
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/**
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* Do basic setup for triangle rasterization and determine which
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* framebuffer tiles are touched. Put the triangle in the scene's
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* bins for the tiles which we overlap.
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*/
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static boolean
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do_triangle_ccw(struct lp_setup_context *setup,
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struct fixed_position *position,
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const float (*v0)[4],
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const float (*v1)[4],
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const float (*v2)[4],
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boolean frontfacing)
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{
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struct lp_scene *scene = setup->scene;
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if (0)
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lp_setup_print_triangle(setup, v0, v1, v2);
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const float (*pv)[4];
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if (setup->flatshade_first) {
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pv = v0;
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} else {
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pv = v2;
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}
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unsigned viewport_index = 0;
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if (setup->viewport_index_slot > 0) {
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unsigned *udata = (unsigned*)pv[setup->viewport_index_slot];
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viewport_index = lp_clamp_viewport_idx(*udata);
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}
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unsigned layer = 0;
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if (setup->layer_slot > 0) {
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layer = *(unsigned*)pv[setup->layer_slot];
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layer = MIN2(layer, scene->fb_max_layer);
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}
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/* Bounding rectangle (in pixels) */
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struct u_rect bbox;
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{
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/* Yes this is necessary to accurately calculate bounding boxes
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* with the two fill-conventions we support. GL (normally) ends
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* up needing a bottom-left fill convention, which requires
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* slightly different rounding.
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*/
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int adj = (setup->bottom_edge_rule != 0) ? 1 : 0;
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/* Inclusive x0, exclusive x1 */
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bbox.x0 = MIN3(position->x[0], position->x[1], position->x[2]) >> FIXED_ORDER;
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bbox.x1 = (MAX3(position->x[0], position->x[1], position->x[2]) - 1) >> FIXED_ORDER;
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/* Inclusive / exclusive depending upon adj (bottom-left or top-right) */
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bbox.y0 = (MIN3(position->y[0], position->y[1], position->y[2]) + adj) >> FIXED_ORDER;
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bbox.y1 = (MAX3(position->y[0], position->y[1], position->y[2]) - 1 + adj) >> FIXED_ORDER;
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}
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if (!u_rect_test_intersection(&setup->draw_regions[viewport_index], &bbox)) {
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if (0) debug_printf("no intersection\n");
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LP_COUNT(nr_culled_tris);
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return TRUE;
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}
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int max_szorig = ((bbox.x1 - (bbox.x0 & ~3)) |
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(bbox.y1 - (bbox.y0 & ~3)));
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boolean use_32bits = max_szorig <= MAX_FIXED_LENGTH32;
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#if defined(_ARCH_PWR8) && UTIL_ARCH_LITTLE_ENDIAN
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boolean pwr8_limit_check = (bbox.x1 - bbox.x0) <= MAX_FIXED_LENGTH32 &&
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(bbox.y1 - bbox.y0) <= MAX_FIXED_LENGTH32;
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#endif
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/* Can safely discard negative regions, but need to keep hold of
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* information about when the triangle extends past screen
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* boundaries. See trimmed_box in lp_setup_bin_triangle().
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*/
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bbox.x0 = MAX2(bbox.x0, 0);
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bbox.y0 = MAX2(bbox.y0, 0);
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int nr_planes = 3;
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/*
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* Determine how many scissor planes we need, that is drop scissor
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* edges if the bounding box of the tri is fully inside that edge.
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*/
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const struct u_rect *scissor = &setup->draw_regions[viewport_index];
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boolean s_planes[4];
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scissor_planes_needed(s_planes, &bbox, scissor);
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nr_planes += s_planes[0] + s_planes[1] + s_planes[2] + s_planes[3];
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unsigned tri_bytes;
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const struct lp_setup_variant_key *key = &setup->setup.variant->key;
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struct lp_rast_triangle *tri =
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lp_setup_alloc_triangle(scene, key->num_inputs, nr_planes, &tri_bytes);
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if (!tri)
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return FALSE;
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#ifdef DEBUG
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tri->v[0][0] = v0[0][0];
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tri->v[1][0] = v1[0][0];
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tri->v[2][0] = v2[0][0];
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tri->v[0][1] = v0[0][1];
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tri->v[1][1] = v1[0][1];
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tri->v[2][1] = v2[0][1];
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#endif
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LP_COUNT(nr_tris);
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/*
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* Rotate the tri such that v0 is closest to the fb origin.
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* This can give more accurate a0 value (which is at fb origin)
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* when calculating the interpolants.
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* It can't work when there's flat shading for instance in one
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* of the attributes, hence restrict this to just a single attribute
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* which is what causes some test failures.
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* (This does not address the problem that interpolation may be
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* inaccurate if gradients are relatively steep in small tris far
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* away from the origin. It does however fix the (silly) wgf11rasterizer
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* Interpolator test.)
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* XXX This causes problems with mipgen -EmuTexture for not yet really
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* understood reasons (if the vertices would be submitted in a different
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* order, we'd also generate the same "wrong" results here without
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* rotation). In any case, that we generate different values if a prim
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* has the vertices rotated but is otherwise the same (which is due to
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* numerical issues) is not a nice property. An additional problem by
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* swapping the vertices here (which is possibly worse) is that
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* the same primitive coming in twice might generate different values
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* (in particular for z) due to the swapping potentially not happening
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* both times, if the attributes to be interpolated are different. For now,
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* just restrict this to not get used with dx9 (by checking pixel offset),
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* could also restrict it further to only trigger with wgf11Interpolator
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* Rasterizer test (the only place which needs it, with always the same
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* vertices even).
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*/
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if ((LP_DEBUG & DEBUG_ACCURATE_A0) &&
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setup->pixel_offset == 0.5f &&
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key->num_inputs == 1 &&
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(key->inputs[0].interp == LP_INTERP_LINEAR ||
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key->inputs[0].interp == LP_INTERP_PERSPECTIVE)) {
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float dist0 = v0[0][0] * v0[0][0] + v0[0][1] * v0[0][1];
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float dist1 = v1[0][0] * v1[0][0] + v1[0][1] * v1[0][1];
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float dist2 = v2[0][0] * v2[0][0] + v2[0][1] * v2[0][1];
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if (dist0 > dist1 && dist1 < dist2) {
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const float (*vt)[4];
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int x, y;
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vt = v0;
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v0 = v1;
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v1 = v2;
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v2 = vt;
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x = position->x[0];
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y = position->y[0];
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position->x[0] = position->x[1];
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position->y[0] = position->y[1];
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position->x[1] = position->x[2];
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position->y[1] = position->y[2];
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position->x[2] = x;
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position->y[2] = y;
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position->dx20 = position->dx01;
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position->dy20 = position->dy01;
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position->dx01 = position->x[0] - position->x[1];
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position->dy01 = position->y[0] - position->y[1];
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} else if (dist0 > dist2) {
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const float (*vt)[4];
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int x, y;
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vt = v0;
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v0 = v2;
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v2 = v1;
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v1 = vt;
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x = position->x[0];
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y = position->y[0];
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position->x[0] = position->x[2];
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position->y[0] = position->y[2];
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position->x[2] = position->x[1];
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position->y[2] = position->y[1];
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position->x[1] = x;
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position->y[1] = y;
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position->dx01 = position->dx20;
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position->dy01 = position->dy20;
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position->dx20 = position->x[2] - position->x[0];
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position->dy20 = position->y[2] - position->y[0];
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}
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}
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/* Setup parameter interpolants:
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*/
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setup->setup.variant->jit_function(v0, v1, v2,
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frontfacing,
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GET_A0(&tri->inputs),
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GET_DADX(&tri->inputs),
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GET_DADY(&tri->inputs),
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&setup->setup.variant->key);
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tri->inputs.frontfacing = frontfacing;
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tri->inputs.disable = FALSE;
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tri->inputs.is_blit = FALSE;
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tri->inputs.layer = layer;
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tri->inputs.viewport_index = viewport_index;
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tri->inputs.view_index = setup->view_index;
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if (0)
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lp_dump_setup_coef(&setup->setup.variant->key,
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GET_A0(&tri->inputs),
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GET_DADX(&tri->inputs),
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GET_DADY(&tri->inputs));
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struct lp_rast_plane *plane = GET_PLANES(tri);
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#if defined(PIPE_ARCH_SSE)
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if (1) {
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__m128i vertx, verty;
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__m128i shufx, shufy;
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__m128i dcdx, dcdy;
|
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__m128i cdx02, cdx13, cdy02, cdy13, c02, c13;
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__m128i c01, c23, unused;
|
|
__m128i dcdx_neg_mask;
|
|
__m128i dcdy_neg_mask;
|
|
__m128i dcdx_zero_mask;
|
|
__m128i top_left_flag, c_dec;
|
|
__m128i eo, p0, p1, p2;
|
|
__m128i zero = _mm_setzero_si128();
|
|
|
|
vertx = _mm_load_si128((__m128i *)position->x); /* vertex x coords */
|
|
verty = _mm_load_si128((__m128i *)position->y); /* vertex y coords */
|
|
|
|
shufx = _mm_shuffle_epi32(vertx, _MM_SHUFFLE(3,0,2,1));
|
|
shufy = _mm_shuffle_epi32(verty, _MM_SHUFFLE(3,0,2,1));
|
|
|
|
dcdx = _mm_sub_epi32(verty, shufy);
|
|
dcdy = _mm_sub_epi32(vertx, shufx);
|
|
|
|
dcdx_neg_mask = _mm_srai_epi32(dcdx, 31);
|
|
dcdx_zero_mask = _mm_cmpeq_epi32(dcdx, zero);
|
|
dcdy_neg_mask = _mm_srai_epi32(dcdy, 31);
|
|
|
|
top_left_flag = _mm_set1_epi32((setup->bottom_edge_rule == 0) ? ~0 : 0);
|
|
|
|
c_dec = _mm_or_si128(dcdx_neg_mask,
|
|
_mm_and_si128(dcdx_zero_mask,
|
|
_mm_xor_si128(dcdy_neg_mask,
|
|
top_left_flag)));
|
|
|
|
/*
|
|
* 64 bit arithmetic.
|
|
* Note we need _signed_ mul (_mm_mul_epi32) which we emulate.
|
|
*/
|
|
cdx02 = mm_mullohi_epi32(dcdx, vertx, &cdx13);
|
|
cdy02 = mm_mullohi_epi32(dcdy, verty, &cdy13);
|
|
c02 = _mm_sub_epi64(cdx02, cdy02);
|
|
c13 = _mm_sub_epi64(cdx13, cdy13);
|
|
c02 = _mm_sub_epi64(c02, _mm_shuffle_epi32(c_dec,
|
|
_MM_SHUFFLE(2,2,0,0)));
|
|
c13 = _mm_sub_epi64(c13, _mm_shuffle_epi32(c_dec,
|
|
_MM_SHUFFLE(3,3,1,1)));
|
|
|
|
/*
|
|
* Useful for very small fbs/tris (or fewer subpixel bits) only:
|
|
* c = _mm_sub_epi32(mm_mullo_epi32(dcdx, vertx),
|
|
* mm_mullo_epi32(dcdy, verty));
|
|
*
|
|
* c = _mm_sub_epi32(c, c_dec);
|
|
*/
|
|
|
|
/* Scale up to match c:
|
|
*/
|
|
dcdx = _mm_slli_epi32(dcdx, FIXED_ORDER);
|
|
dcdy = _mm_slli_epi32(dcdy, FIXED_ORDER);
|
|
|
|
/*
|
|
* Calculate trivial reject values:
|
|
* Note eo cannot overflow even if dcdx/dcdy would already have
|
|
* 31 bits (which they shouldn't have). This is because eo
|
|
* is never negative (albeit if we rely on that need to be careful...)
|
|
*/
|
|
eo = _mm_sub_epi32(_mm_andnot_si128(dcdy_neg_mask, dcdy),
|
|
_mm_and_si128(dcdx_neg_mask, dcdx));
|
|
|
|
/* ei = _mm_sub_epi32(_mm_sub_epi32(dcdy, dcdx), eo); */
|
|
|
|
/*
|
|
* Pointless transpose which gets undone immediately in
|
|
* rasterization.
|
|
* It is actually difficult to do away with it - would essentially
|
|
* need GET_PLANES_DX, GET_PLANES_DY etc., but the calculations
|
|
* for this then would need to depend on the number of planes.
|
|
* The transpose is quite special here due to c being 64bit...
|
|
* The store has to be unaligned (unless we'd make the plane size
|
|
* a multiple of 128), and of course storing eo separately...
|
|
*/
|
|
c01 = _mm_unpacklo_epi64(c02, c13);
|
|
c23 = _mm_unpackhi_epi64(c02, c13);
|
|
transpose2_64_2_32(&c01, &c23, &dcdx, &dcdy,
|
|
&p0, &p1, &p2, &unused);
|
|
_mm_storeu_si128((__m128i *)&plane[0], p0);
|
|
plane[0].eo = (uint32_t)_mm_cvtsi128_si32(eo);
|
|
_mm_storeu_si128((__m128i *)&plane[1], p1);
|
|
eo = _mm_shuffle_epi32(eo, _MM_SHUFFLE(3,2,0,1));
|
|
plane[1].eo = (uint32_t)_mm_cvtsi128_si32(eo);
|
|
_mm_storeu_si128((__m128i *)&plane[2], p2);
|
|
eo = _mm_shuffle_epi32(eo, _MM_SHUFFLE(0,0,0,2));
|
|
plane[2].eo = (uint32_t)_mm_cvtsi128_si32(eo);
|
|
} else
|
|
#elif defined(_ARCH_PWR8) && UTIL_ARCH_LITTLE_ENDIAN
|
|
/*
|
|
* XXX this code is effectively disabled for all practical purposes,
|
|
* as the allowed fb size is tiny if FIXED_ORDER is 8.
|
|
*/
|
|
if (setup->fb.width <= MAX_FIXED_LENGTH32 &&
|
|
setup->fb.height <= MAX_FIXED_LENGTH32 &&
|
|
pwr8_limit_check) {
|
|
unsigned int bottom_edge;
|
|
__m128i vertx, verty;
|
|
__m128i shufx, shufy;
|
|
__m128i dcdx, dcdy, c;
|
|
__m128i unused;
|
|
__m128i dcdx_neg_mask;
|
|
__m128i dcdy_neg_mask;
|
|
__m128i dcdx_zero_mask;
|
|
__m128i top_left_flag;
|
|
__m128i c_inc_mask, c_inc;
|
|
__m128i eo, p0, p1, p2;
|
|
__m128i_union vshuf_mask;
|
|
__m128i zero = vec_splats((unsigned char) 0);
|
|
alignas(16) int32_t temp_vec[4];
|
|
|
|
#if UTIL_ARCH_LITTLE_ENDIAN
|
|
vshuf_mask.i[0] = 0x07060504;
|
|
vshuf_mask.i[1] = 0x0B0A0908;
|
|
vshuf_mask.i[2] = 0x03020100;
|
|
vshuf_mask.i[3] = 0x0F0E0D0C;
|
|
#else
|
|
vshuf_mask.i[0] = 0x00010203;
|
|
vshuf_mask.i[1] = 0x0C0D0E0F;
|
|
vshuf_mask.i[2] = 0x04050607;
|
|
vshuf_mask.i[3] = 0x08090A0B;
|
|
#endif
|
|
|
|
/* vertex x coords */
|
|
vertx = vec_load_si128((const uint32_t *) position->x);
|
|
/* vertex y coords */
|
|
verty = vec_load_si128((const uint32_t *) position->y);
|
|
|
|
shufx = vec_perm (vertx, vertx, vshuf_mask.m128i);
|
|
shufy = vec_perm (verty, verty, vshuf_mask.m128i);
|
|
|
|
dcdx = vec_sub_epi32(verty, shufy);
|
|
dcdy = vec_sub_epi32(vertx, shufx);
|
|
|
|
dcdx_neg_mask = vec_srai_epi32(dcdx, 31);
|
|
dcdx_zero_mask = vec_cmpeq_epi32(dcdx, zero);
|
|
dcdy_neg_mask = vec_srai_epi32(dcdy, 31);
|
|
|
|
bottom_edge = (setup->bottom_edge_rule == 0) ? ~0 : 0;
|
|
top_left_flag = (__m128i) vec_splats(bottom_edge);
|
|
|
|
c_inc_mask = vec_or(dcdx_neg_mask,
|
|
vec_and(dcdx_zero_mask,
|
|
vec_xor(dcdy_neg_mask,
|
|
top_left_flag)));
|
|
|
|
c_inc = vec_srli_epi32(c_inc_mask, 31);
|
|
|
|
c = vec_sub_epi32(vec_mullo_epi32(dcdx, vertx),
|
|
vec_mullo_epi32(dcdy, verty));
|
|
|
|
c = vec_add_epi32(c, c_inc);
|
|
|
|
/* Scale up to match c:
|
|
*/
|
|
dcdx = vec_slli_epi32(dcdx, FIXED_ORDER);
|
|
dcdy = vec_slli_epi32(dcdy, FIXED_ORDER);
|
|
|
|
/* Calculate trivial reject values:
|
|
*/
|
|
eo = vec_sub_epi32(vec_andnot_si128(dcdy_neg_mask, dcdy),
|
|
vec_and(dcdx_neg_mask, dcdx));
|
|
|
|
/* ei = _mm_sub_epi32(_mm_sub_epi32(dcdy, dcdx), eo); */
|
|
|
|
/* Pointless transpose which gets undone immediately in
|
|
* rasterization:
|
|
*/
|
|
transpose4_epi32(&c, &dcdx, &dcdy, &eo,
|
|
&p0, &p1, &p2, &unused);
|
|
|
|
#define STORE_PLANE(plane, vec) do { \
|
|
vec_store_si128((uint32_t *)&temp_vec, vec); \
|
|
plane.c = (int64_t)temp_vec[0]; \
|
|
plane.dcdx = temp_vec[1]; \
|
|
plane.dcdy = temp_vec[2]; \
|
|
plane.eo = temp_vec[3]; \
|
|
} while(0)
|
|
|
|
STORE_PLANE(plane[0], p0);
|
|
STORE_PLANE(plane[1], p1);
|
|
STORE_PLANE(plane[2], p2);
|
|
#undef STORE_PLANE
|
|
} else
|
|
#endif
|
|
{
|
|
plane[0].dcdy = position->dx01;
|
|
plane[1].dcdy = position->x[1] - position->x[2];
|
|
plane[2].dcdy = position->dx20;
|
|
plane[0].dcdx = position->dy01;
|
|
plane[1].dcdx = position->y[1] - position->y[2];
|
|
plane[2].dcdx = position->dy20;
|
|
|
|
for (int i = 0; i < 3; i++) {
|
|
/* half-edge constants, will be iterated over the whole render
|
|
* target.
|
|
*/
|
|
plane[i].c = IMUL64(plane[i].dcdx, position->x[i]) -
|
|
IMUL64(plane[i].dcdy, position->y[i]);
|
|
|
|
/* correct for top-left vs. bottom-left fill convention.
|
|
*/
|
|
if (plane[i].dcdx < 0) {
|
|
/* both fill conventions want this - adjust for left edges */
|
|
plane[i].c++;
|
|
}
|
|
else if (plane[i].dcdx == 0) {
|
|
if (setup->bottom_edge_rule == 0) {
|
|
/* correct for top-left fill convention:
|
|
*/
|
|
if (plane[i].dcdy > 0)
|
|
plane[i].c++;
|
|
} else {
|
|
/* correct for bottom-left fill convention:
|
|
*/
|
|
if (plane[i].dcdy < 0)
|
|
plane[i].c++;
|
|
}
|
|
}
|
|
|
|
/* Scale up to match c:
|
|
*/
|
|
assert((plane[i].dcdx << FIXED_ORDER) >> FIXED_ORDER == plane[i].dcdx);
|
|
assert((plane[i].dcdy << FIXED_ORDER) >> FIXED_ORDER == plane[i].dcdy);
|
|
plane[i].dcdx <<= FIXED_ORDER;
|
|
plane[i].dcdy <<= FIXED_ORDER;
|
|
|
|
/* find trivial reject offsets for each edge for a single-pixel
|
|
* sized block. These will be scaled up at each recursive level to
|
|
* match the active blocksize. Scaling in this way works best if
|
|
* the blocks are square.
|
|
*/
|
|
plane[i].eo = 0;
|
|
if (plane[i].dcdx < 0) plane[i].eo -= plane[i].dcdx;
|
|
if (plane[i].dcdy > 0) plane[i].eo += plane[i].dcdy;
|
|
}
|
|
}
|
|
|
|
if (0) {
|
|
debug_printf("p0: %"PRIx64"/%08x/%08x/%08x\n",
|
|
plane[0].c,
|
|
plane[0].dcdx,
|
|
plane[0].dcdy,
|
|
plane[0].eo);
|
|
|
|
debug_printf("p1: %"PRIx64"/%08x/%08x/%08x\n",
|
|
plane[1].c,
|
|
plane[1].dcdx,
|
|
plane[1].dcdy,
|
|
plane[1].eo);
|
|
|
|
debug_printf("p2: %"PRIx64"/%08x/%08x/%08x\n",
|
|
plane[2].c,
|
|
plane[2].dcdx,
|
|
plane[2].dcdy,
|
|
plane[2].eo);
|
|
}
|
|
|
|
if (nr_planes > 3) {
|
|
lp_setup_add_scissor_planes(scissor, &plane[3], s_planes, setup->multisample);
|
|
}
|
|
|
|
return lp_setup_bin_triangle(setup, tri, use_32bits,
|
|
check_opaque(setup, v0, v1, v2),
|
|
&bbox, nr_planes, viewport_index);
|
|
}
|
|
|
|
/*
|
|
* Round to nearest less or equal power of two of the input.
|
|
*
|
|
* Undefined if no bit set exists, so code should check against 0 first.
|
|
*/
|
|
static inline uint32_t
|
|
floor_pot(uint32_t n)
|
|
{
|
|
#if defined(PIPE_CC_GCC) && (defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64))
|
|
if (n == 0)
|
|
return 0;
|
|
|
|
__asm__("bsr %1,%0"
|
|
: "=r" (n)
|
|
: "rm" (n)
|
|
: "cc");
|
|
return 1 << n;
|
|
#else
|
|
n |= (n >> 1);
|
|
n |= (n >> 2);
|
|
n |= (n >> 4);
|
|
n |= (n >> 8);
|
|
n |= (n >> 16);
|
|
return n - (n >> 1);
|
|
#endif
|
|
}
|
|
|
|
|
|
boolean
|
|
lp_setup_bin_triangle(struct lp_setup_context *setup,
|
|
struct lp_rast_triangle *tri,
|
|
boolean use_32bits,
|
|
boolean opaque,
|
|
const struct u_rect *bbox,
|
|
int nr_planes,
|
|
unsigned viewport_index)
|
|
{
|
|
struct lp_scene *scene = setup->scene;
|
|
unsigned cmd;
|
|
|
|
/* What is the largest power-of-two boundary this triangle crosses:
|
|
*/
|
|
const int dx = floor_pot((bbox->x0 ^ bbox->x1) |
|
|
(bbox->y0 ^ bbox->y1));
|
|
|
|
/* The largest dimension of the rasterized area of the triangle
|
|
* (aligned to a 4x4 grid), rounded down to the nearest power of two:
|
|
*/
|
|
const int max_sz = ((bbox->x1 - (bbox->x0 & ~3)) |
|
|
(bbox->y1 - (bbox->y0 & ~3)));
|
|
const int sz = floor_pot(max_sz);
|
|
|
|
/*
|
|
* NOTE: It is important to use the original bounding box
|
|
* which might contain negative values here, because if the
|
|
* plane math may overflow or not with the 32bit rasterization
|
|
* functions depends on the original extent of the triangle.
|
|
*/
|
|
|
|
/* Now apply scissor, etc to the bounding box. Could do this
|
|
* earlier, but it confuses the logic for tri-16 and would force
|
|
* the rasterizer to also respect scissor, etc, just for the rare
|
|
* cases where a small triangle extends beyond the scissor.
|
|
*/
|
|
struct u_rect trimmed_box = *bbox;
|
|
u_rect_find_intersection(&setup->draw_regions[viewport_index],
|
|
&trimmed_box);
|
|
|
|
/* Determine which tile(s) intersect the triangle's bounding box
|
|
*/
|
|
if (dx < TILE_SIZE) {
|
|
const int ix0 = bbox->x0 / TILE_SIZE;
|
|
const int iy0 = bbox->y0 / TILE_SIZE;
|
|
unsigned px = bbox->x0 & 63 & ~3;
|
|
unsigned py = bbox->y0 & 63 & ~3;
|
|
|
|
assert(iy0 == bbox->y1 / TILE_SIZE &&
|
|
ix0 == bbox->x1 / TILE_SIZE);
|
|
|
|
if (nr_planes == 3) {
|
|
if (sz < 4) {
|
|
/* Triangle is contained in a single 4x4 stamp:
|
|
*/
|
|
assert(px + 4 <= TILE_SIZE);
|
|
assert(py + 4 <= TILE_SIZE);
|
|
if (setup->multisample)
|
|
cmd = LP_RAST_OP_MS_TRIANGLE_3_4;
|
|
else
|
|
cmd = use_32bits ? LP_RAST_OP_TRIANGLE_32_3_4 : LP_RAST_OP_TRIANGLE_3_4;
|
|
return lp_scene_bin_cmd_with_state(scene, ix0, iy0,
|
|
setup->fs.stored, cmd,
|
|
lp_rast_arg_triangle_contained(tri, px, py));
|
|
}
|
|
|
|
if (sz < 16) {
|
|
/* Triangle is contained in a single 16x16 block:
|
|
*/
|
|
|
|
/*
|
|
* The 16x16 block is only 4x4 aligned, and can exceed the tile
|
|
* dimensions if the triangle is 16 pixels in one dimension but 4
|
|
* in the other. So budge the 16x16 back inside the tile.
|
|
*/
|
|
px = MIN2(px, TILE_SIZE - 16);
|
|
py = MIN2(py, TILE_SIZE - 16);
|
|
|
|
assert(px + 16 <= TILE_SIZE);
|
|
assert(py + 16 <= TILE_SIZE);
|
|
|
|
if (setup->multisample)
|
|
cmd = LP_RAST_OP_MS_TRIANGLE_3_16;
|
|
else
|
|
cmd = use_32bits ? LP_RAST_OP_TRIANGLE_32_3_16 : LP_RAST_OP_TRIANGLE_3_16;
|
|
return lp_scene_bin_cmd_with_state(scene, ix0, iy0,
|
|
setup->fs.stored, cmd,
|
|
lp_rast_arg_triangle_contained(tri, px, py));
|
|
}
|
|
} else if (nr_planes == 4 && sz < 16) {
|
|
px = MIN2(px, TILE_SIZE - 16);
|
|
py = MIN2(py, TILE_SIZE - 16);
|
|
|
|
assert(px + 16 <= TILE_SIZE);
|
|
assert(py + 16 <= TILE_SIZE);
|
|
|
|
if (setup->multisample)
|
|
cmd = LP_RAST_OP_MS_TRIANGLE_4_16;
|
|
else
|
|
cmd = use_32bits ? LP_RAST_OP_TRIANGLE_32_4_16 : LP_RAST_OP_TRIANGLE_4_16;
|
|
return lp_scene_bin_cmd_with_state(scene, ix0, iy0,
|
|
setup->fs.stored, cmd,
|
|
lp_rast_arg_triangle_contained(tri, px, py));
|
|
}
|
|
|
|
/* Triangle is contained in a single tile:
|
|
*/
|
|
if (setup->multisample)
|
|
cmd = lp_rast_ms_tri_tab[nr_planes];
|
|
else
|
|
cmd = use_32bits ? lp_rast_32_tri_tab[nr_planes] : lp_rast_tri_tab[nr_planes];
|
|
return lp_scene_bin_cmd_with_state(scene, ix0, iy0, setup->fs.stored, cmd,
|
|
lp_rast_arg_triangle(tri, (1<<nr_planes)-1));
|
|
} else {
|
|
struct lp_rast_plane *plane = GET_PLANES(tri);
|
|
int64_t c[MAX_PLANES];
|
|
int64_t ei[MAX_PLANES];
|
|
|
|
int64_t eo[MAX_PLANES];
|
|
int64_t xstep[MAX_PLANES];
|
|
int64_t ystep[MAX_PLANES];
|
|
int x, y;
|
|
|
|
const int ix0 = trimmed_box.x0 / TILE_SIZE;
|
|
const int iy0 = trimmed_box.y0 / TILE_SIZE;
|
|
const int ix1 = trimmed_box.x1 / TILE_SIZE;
|
|
const int iy1 = trimmed_box.y1 / TILE_SIZE;
|
|
|
|
for (int i = 0; i < nr_planes; i++) {
|
|
c[i] = (plane[i].c +
|
|
IMUL64(plane[i].dcdy, iy0) * TILE_SIZE -
|
|
IMUL64(plane[i].dcdx, ix0) * TILE_SIZE);
|
|
|
|
ei[i] = (plane[i].dcdy -
|
|
plane[i].dcdx -
|
|
(int64_t)plane[i].eo) << TILE_ORDER;
|
|
|
|
eo[i] = (int64_t)plane[i].eo << TILE_ORDER;
|
|
xstep[i] = -(((int64_t)plane[i].dcdx) << TILE_ORDER);
|
|
ystep[i] = ((int64_t)plane[i].dcdy) << TILE_ORDER;
|
|
}
|
|
|
|
tri->inputs.is_blit = lp_setup_is_blit(setup, &tri->inputs);
|
|
|
|
/* Test tile-sized blocks against the triangle.
|
|
* Discard blocks fully outside the tri. If the block is fully
|
|
* contained inside the tri, bin an lp_rast_shade_tile command.
|
|
* Else, bin a lp_rast_triangle command.
|
|
*/
|
|
for (y = iy0; y <= iy1; y++) {
|
|
boolean in = FALSE; /* are we inside the triangle? */
|
|
int64_t cx[MAX_PLANES];
|
|
|
|
for (int i = 0; i < nr_planes; i++)
|
|
cx[i] = c[i];
|
|
|
|
for (x = ix0; x <= ix1; x++) {
|
|
int out = 0;
|
|
int partial = 0;
|
|
|
|
for (int i = 0; i < nr_planes; i++) {
|
|
int64_t planeout = cx[i] + eo[i];
|
|
int64_t planepartial = cx[i] + ei[i] - 1;
|
|
out |= (int) (planeout >> 63);
|
|
partial |= ((int) (planepartial >> 63)) & (1<<i);
|
|
}
|
|
|
|
if (out) {
|
|
/* do nothing */
|
|
if (in)
|
|
break; /* exiting triangle, all done with this row */
|
|
LP_COUNT(nr_empty_64);
|
|
} else if (partial) {
|
|
/* Not trivially accepted by at least one plane -
|
|
* rasterize/shade partial tile
|
|
*/
|
|
int count = util_bitcount(partial);
|
|
in = TRUE;
|
|
|
|
if (setup->multisample)
|
|
cmd = lp_rast_ms_tri_tab[count];
|
|
else
|
|
cmd = use_32bits ? lp_rast_32_tri_tab[count] : lp_rast_tri_tab[count];
|
|
if (!lp_scene_bin_cmd_with_state(scene, x, y,
|
|
setup->fs.stored, cmd,
|
|
lp_rast_arg_triangle(tri, partial)))
|
|
goto fail;
|
|
|
|
LP_COUNT(nr_partially_covered_64);
|
|
} else {
|
|
/* triangle covers the whole tile- shade whole tile */
|
|
LP_COUNT(nr_fully_covered_64);
|
|
in = TRUE;
|
|
if (!lp_setup_whole_tile(setup, &tri->inputs, x, y, opaque))
|
|
goto fail;
|
|
}
|
|
|
|
/* Iterate cx values across the region: */
|
|
for (int i = 0; i < nr_planes; i++)
|
|
cx[i] += xstep[i];
|
|
}
|
|
|
|
/* Iterate c values down the region: */
|
|
for (int i = 0; i < nr_planes; i++)
|
|
c[i] += ystep[i];
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
|
|
fail:
|
|
/* Need to disable any partially binned triangle. This is easier
|
|
* than trying to locate all the triangle, shade-tile, etc,
|
|
* commands which may have been binned.
|
|
*/
|
|
tri->inputs.disable = TRUE;
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
/**
|
|
* Try to draw the triangle, restart the scene on failure.
|
|
*/
|
|
static inline void
|
|
retry_triangle_ccw(struct lp_setup_context *setup,
|
|
struct fixed_position *position,
|
|
const float (*v0)[4],
|
|
const float (*v1)[4],
|
|
const float (*v2)[4],
|
|
boolean front)
|
|
{
|
|
if (!do_triangle_ccw(setup, position, v0, v1, v2, front)) {
|
|
if (!lp_setup_flush_and_restart(setup))
|
|
return;
|
|
|
|
if (!do_triangle_ccw(setup, position, v0, v1, v2, front))
|
|
return;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Calculate fixed position data for a triangle
|
|
* It is unfortunate we need to do that here (as we need area
|
|
* calculated in fixed point), as there's quite some code duplication
|
|
* to what is done in the jit setup prog.
|
|
*/
|
|
static inline int8_t
|
|
calc_fixed_position(struct lp_setup_context *setup,
|
|
struct fixed_position* position,
|
|
const float (*v0)[4],
|
|
const float (*v1)[4],
|
|
const float (*v2)[4])
|
|
{
|
|
float pixel_offset = setup->multisample ? 0.0 : setup->pixel_offset;
|
|
/*
|
|
* The rounding may not be quite the same with PIPE_ARCH_SSE
|
|
* (util_iround right now only does nearest/even on x87,
|
|
* otherwise nearest/away-from-zero).
|
|
* Both should be acceptable, I think.
|
|
*/
|
|
#if defined(PIPE_ARCH_SSE)
|
|
__m128 v0r, v1r;
|
|
__m128 vxy0xy2, vxy1xy0;
|
|
__m128i vxy0xy2i, vxy1xy0i;
|
|
__m128i dxdy0120, x0x2y0y2, x1x0y1y0, x0120, y0120;
|
|
__m128 pix_offset = _mm_set1_ps(pixel_offset);
|
|
__m128 fixed_one = _mm_set1_ps((float)FIXED_ONE);
|
|
v0r = _mm_castpd_ps(_mm_load_sd((double *)v0[0]));
|
|
vxy0xy2 = _mm_loadh_pi(v0r, (__m64 *)v2[0]);
|
|
v1r = _mm_castpd_ps(_mm_load_sd((double *)v1[0]));
|
|
vxy1xy0 = _mm_movelh_ps(v1r, vxy0xy2);
|
|
vxy0xy2 = _mm_sub_ps(vxy0xy2, pix_offset);
|
|
vxy1xy0 = _mm_sub_ps(vxy1xy0, pix_offset);
|
|
vxy0xy2 = _mm_mul_ps(vxy0xy2, fixed_one);
|
|
vxy1xy0 = _mm_mul_ps(vxy1xy0, fixed_one);
|
|
vxy0xy2i = _mm_cvtps_epi32(vxy0xy2);
|
|
vxy1xy0i = _mm_cvtps_epi32(vxy1xy0);
|
|
dxdy0120 = _mm_sub_epi32(vxy0xy2i, vxy1xy0i);
|
|
_mm_store_si128((__m128i *)&position->dx01, dxdy0120);
|
|
/*
|
|
* For the mul, would need some more shuffles, plus emulation
|
|
* for the signed mul (without sse41), so don't bother.
|
|
*/
|
|
x0x2y0y2 = _mm_shuffle_epi32(vxy0xy2i, _MM_SHUFFLE(3,1,2,0));
|
|
x1x0y1y0 = _mm_shuffle_epi32(vxy1xy0i, _MM_SHUFFLE(3,1,2,0));
|
|
x0120 = _mm_unpacklo_epi32(x0x2y0y2, x1x0y1y0);
|
|
y0120 = _mm_unpackhi_epi32(x0x2y0y2, x1x0y1y0);
|
|
_mm_store_si128((__m128i *)&position->x[0], x0120);
|
|
_mm_store_si128((__m128i *)&position->y[0], y0120);
|
|
|
|
#else
|
|
position->x[0] = subpixel_snap(v0[0][0] - pixel_offset);
|
|
position->x[1] = subpixel_snap(v1[0][0] - pixel_offset);
|
|
position->x[2] = subpixel_snap(v2[0][0] - pixel_offset);
|
|
position->x[3] = 0; // should be unused
|
|
|
|
position->y[0] = subpixel_snap(v0[0][1] - pixel_offset);
|
|
position->y[1] = subpixel_snap(v1[0][1] - pixel_offset);
|
|
position->y[2] = subpixel_snap(v2[0][1] - pixel_offset);
|
|
position->y[3] = 0; // should be unused
|
|
|
|
position->dx01 = position->x[0] - position->x[1];
|
|
position->dy01 = position->y[0] - position->y[1];
|
|
|
|
position->dx20 = position->x[2] - position->x[0];
|
|
position->dy20 = position->y[2] - position->y[0];
|
|
#endif
|
|
|
|
uint64_t area = IMUL64(position->dx01, position->dy20) -
|
|
IMUL64(position->dx20, position->dy01);
|
|
return area == 0 ? 0 : (area & (1ULL << 63)) ? -1 : 1;
|
|
}
|
|
|
|
|
|
/**
|
|
* Rotate a triangle, flipping its clockwise direction,
|
|
* Swaps values for xy[0] and xy[1]
|
|
*/
|
|
static inline void
|
|
rotate_fixed_position_01(struct fixed_position* position)
|
|
{
|
|
int x = position->x[1];
|
|
int y = position->y[1];
|
|
|
|
position->x[1] = position->x[0];
|
|
position->y[1] = position->y[0];
|
|
position->x[0] = x;
|
|
position->y[0] = y;
|
|
|
|
position->dx01 = -position->dx01;
|
|
position->dy01 = -position->dy01;
|
|
position->dx20 = position->x[2] - position->x[0];
|
|
position->dy20 = position->y[2] - position->y[0];
|
|
}
|
|
|
|
|
|
/**
|
|
* Rotate a triangle, flipping its clockwise direction,
|
|
* Swaps values for xy[1] and xy[2]
|
|
*/
|
|
static inline void
|
|
rotate_fixed_position_12(struct fixed_position* position)
|
|
{
|
|
int x = position->x[2];
|
|
int y = position->y[2];
|
|
|
|
position->x[2] = position->x[1];
|
|
position->y[2] = position->y[1];
|
|
position->x[1] = x;
|
|
position->y[1] = y;
|
|
|
|
x = position->dx01;
|
|
y = position->dy01;
|
|
position->dx01 = -position->dx20;
|
|
position->dy01 = -position->dy20;
|
|
position->dx20 = -x;
|
|
position->dy20 = -y;
|
|
}
|
|
|
|
|
|
/**
|
|
* Draw triangle if it's CW, cull otherwise.
|
|
*/
|
|
static void
|
|
triangle_cw(struct lp_setup_context *setup,
|
|
const float (*v0)[4],
|
|
const float (*v1)[4],
|
|
const float (*v2)[4])
|
|
{
|
|
alignas(16) struct fixed_position position;
|
|
struct llvmpipe_context *lp_context = (struct llvmpipe_context *)setup->pipe;
|
|
|
|
if (lp_context->active_statistics_queries) {
|
|
lp_context->pipeline_statistics.c_primitives++;
|
|
}
|
|
|
|
int8_t area_sign = calc_fixed_position(setup, &position, v0, v1, v2);
|
|
|
|
if (area_sign < 0) {
|
|
if (setup->flatshade_first) {
|
|
rotate_fixed_position_12(&position);
|
|
retry_triangle_ccw(setup, &position, v0, v2, v1, !setup->ccw_is_frontface);
|
|
} else {
|
|
rotate_fixed_position_01(&position);
|
|
retry_triangle_ccw(setup, &position, v1, v0, v2, !setup->ccw_is_frontface);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
triangle_ccw(struct lp_setup_context *setup,
|
|
const float (*v0)[4],
|
|
const float (*v1)[4],
|
|
const float (*v2)[4])
|
|
{
|
|
alignas(16) struct fixed_position position;
|
|
struct llvmpipe_context *lp_context = (struct llvmpipe_context *)setup->pipe;
|
|
|
|
if (lp_context->active_statistics_queries) {
|
|
lp_context->pipeline_statistics.c_primitives++;
|
|
}
|
|
|
|
int8_t area_sign = calc_fixed_position(setup, &position, v0, v1, v2);
|
|
|
|
if (area_sign > 0)
|
|
retry_triangle_ccw(setup, &position, v0, v1, v2, setup->ccw_is_frontface);
|
|
}
|
|
|
|
|
|
/**
|
|
* Draw triangle whether it's CW or CCW.
|
|
*/
|
|
static void
|
|
triangle_both(struct lp_setup_context *setup,
|
|
const float (*v0)[4],
|
|
const float (*v1)[4],
|
|
const float (*v2)[4])
|
|
{
|
|
alignas(16) struct fixed_position position;
|
|
struct llvmpipe_context *lp_context = (struct llvmpipe_context *)setup->pipe;
|
|
|
|
if (lp_context->active_statistics_queries) {
|
|
lp_context->pipeline_statistics.c_primitives++;
|
|
}
|
|
|
|
int8_t area_sign = calc_fixed_position(setup, &position, v0, v1, v2);
|
|
|
|
if (0) {
|
|
assert(!util_is_inf_or_nan(v0[0][0]));
|
|
assert(!util_is_inf_or_nan(v0[0][1]));
|
|
assert(!util_is_inf_or_nan(v1[0][0]));
|
|
assert(!util_is_inf_or_nan(v1[0][1]));
|
|
assert(!util_is_inf_or_nan(v2[0][0]));
|
|
assert(!util_is_inf_or_nan(v2[0][1]));
|
|
}
|
|
|
|
if (area_sign > 0) {
|
|
retry_triangle_ccw(setup, &position, v0, v1, v2, setup->ccw_is_frontface);
|
|
} else if (area_sign < 0) {
|
|
if (setup->flatshade_first) {
|
|
rotate_fixed_position_12(&position);
|
|
retry_triangle_ccw(setup, &position, v0, v2, v1, !setup->ccw_is_frontface);
|
|
} else {
|
|
rotate_fixed_position_01(&position);
|
|
retry_triangle_ccw(setup, &position, v1, v0, v2, !setup->ccw_is_frontface);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
triangle_noop(struct lp_setup_context *setup,
|
|
const float (*v0)[4],
|
|
const float (*v1)[4],
|
|
const float (*v2)[4])
|
|
{
|
|
}
|
|
|
|
|
|
void
|
|
lp_setup_choose_triangle(struct lp_setup_context *setup)
|
|
{
|
|
if (setup->rasterizer_discard) {
|
|
setup->triangle = triangle_noop;
|
|
return;
|
|
}
|
|
switch (setup->cullmode) {
|
|
case PIPE_FACE_NONE:
|
|
setup->triangle = triangle_both;
|
|
break;
|
|
case PIPE_FACE_BACK:
|
|
setup->triangle = setup->ccw_is_frontface ? triangle_ccw : triangle_cw;
|
|
break;
|
|
case PIPE_FACE_FRONT:
|
|
setup->triangle = setup->ccw_is_frontface ? triangle_cw : triangle_ccw;
|
|
break;
|
|
default:
|
|
setup->triangle = triangle_noop;
|
|
break;
|
|
}
|
|
}
|