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Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_setup_coef.c')
-rw-r--r--src/gallium/drivers/llvmpipe/lp_setup_coef.c279
1 files changed, 0 insertions, 279 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_setup_coef.c b/src/gallium/drivers/llvmpipe/lp_setup_coef.c
deleted file mode 100644
index 8dc2688ddb..0000000000
--- a/src/gallium/drivers/llvmpipe/lp_setup_coef.c
+++ /dev/null
@@ -1,279 +0,0 @@
-/**************************************************************************
- *
- * Copyright 2010, VMware.
- * 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, sub license, 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 (including the
- * next paragraph) 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 NON-INFRINGEMENT.
- * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS 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.
- *
- **************************************************************************/
-
-/*
- * Binning code for triangles
- */
-
-#include "util/u_math.h"
-#include "util/u_memory.h"
-#include "lp_perf.h"
-#include "lp_setup_context.h"
-#include "lp_setup_coef.h"
-#include "lp_rast.h"
-#include "lp_state_fs.h"
-
-#if !defined(PIPE_ARCH_SSE)
-
-/**
- * Compute a0 for a constant-valued coefficient (GL_FLAT shading).
- */
-static void constant_coef( struct lp_rast_shader_inputs *inputs,
- unsigned slot,
- const float value,
- unsigned i )
-{
- inputs->a0[slot][i] = value;
- inputs->dadx[slot][i] = 0.0f;
- inputs->dady[slot][i] = 0.0f;
-}
-
-
-
-static void linear_coef( struct lp_rast_shader_inputs *inputs,
- const struct lp_tri_info *info,
- unsigned slot,
- unsigned vert_attr,
- unsigned i)
-{
- float a0 = info->v0[vert_attr][i];
- float a1 = info->v1[vert_attr][i];
- float a2 = info->v2[vert_attr][i];
-
- float da01 = a0 - a1;
- float da20 = a2 - a0;
- float dadx = (da01 * info->dy20_ooa - info->dy01_ooa * da20);
- float dady = (da20 * info->dx01_ooa - info->dx20_ooa * da01);
-
- inputs->dadx[slot][i] = dadx;
- inputs->dady[slot][i] = dady;
-
- /* calculate a0 as the value which would be sampled for the
- * fragment at (0,0), taking into account that we want to sample at
- * pixel centers, in other words (0.5, 0.5).
- *
- * this is neat but unfortunately not a good way to do things for
- * triangles with very large values of dadx or dady as it will
- * result in the subtraction and re-addition from a0 of a very
- * large number, which means we'll end up loosing a lot of the
- * fractional bits and precision from a0. the way to fix this is
- * to define a0 as the sample at a pixel center somewhere near vmin
- * instead - i'll switch to this later.
- */
- inputs->a0[slot][i] = a0 - (dadx * info->x0_center +
- dady * info->y0_center);
-}
-
-
-/**
- * Compute a0, dadx and dady for a perspective-corrected interpolant,
- * for a triangle.
- * We basically multiply the vertex value by 1/w before computing
- * the plane coefficients (a0, dadx, dady).
- * Later, when we compute the value at a particular fragment position we'll
- * divide the interpolated value by the interpolated W at that fragment.
- */
-static void perspective_coef( struct lp_rast_shader_inputs *inputs,
- const struct lp_tri_info *info,
- unsigned slot,
- unsigned vert_attr,
- unsigned i)
-{
- /* premultiply by 1/w (v[0][3] is always 1/w):
- */
- float a0 = info->v0[vert_attr][i] * info->v0[0][3];
- float a1 = info->v1[vert_attr][i] * info->v1[0][3];
- float a2 = info->v2[vert_attr][i] * info->v2[0][3];
- float da01 = a0 - a1;
- float da20 = a2 - a0;
- float dadx = da01 * info->dy20_ooa - info->dy01_ooa * da20;
- float dady = da20 * info->dx01_ooa - info->dx20_ooa * da01;
-
- inputs->dadx[slot][i] = dadx;
- inputs->dady[slot][i] = dady;
- inputs->a0[slot][i] = a0 - (dadx * info->x0_center +
- dady * info->y0_center);
-}
-
-
-/**
- * Special coefficient setup for gl_FragCoord.
- * X and Y are trivial
- * Z and W are copied from position_coef which should have already been computed.
- * We could do a bit less work if we'd examine gl_FragCoord's swizzle mask.
- */
-static void
-setup_fragcoord_coef(struct lp_rast_shader_inputs *inputs,
- const struct lp_tri_info *info,
- unsigned slot,
- unsigned usage_mask)
-{
- /*X*/
- if (usage_mask & TGSI_WRITEMASK_X) {
- inputs->a0[slot][0] = 0.0;
- inputs->dadx[slot][0] = 1.0;
- inputs->dady[slot][0] = 0.0;
- }
-
- /*Y*/
- if (usage_mask & TGSI_WRITEMASK_Y) {
- inputs->a0[slot][1] = 0.0;
- inputs->dadx[slot][1] = 0.0;
- inputs->dady[slot][1] = 1.0;
- }
-
- /*Z*/
- if (usage_mask & TGSI_WRITEMASK_Z) {
- linear_coef(inputs, info, slot, 0, 2);
- }
-
- /*W*/
- if (usage_mask & TGSI_WRITEMASK_W) {
- linear_coef(inputs, info, slot, 0, 3);
- }
-}
-
-
-/**
- * Setup the fragment input attribute with the front-facing value.
- * \param frontface is the triangle front facing?
- */
-static void setup_facing_coef( struct lp_rast_shader_inputs *inputs,
- unsigned slot,
- boolean frontface,
- unsigned usage_mask)
-{
- /* convert TRUE to 1.0 and FALSE to -1.0 */
- if (usage_mask & TGSI_WRITEMASK_X)
- constant_coef( inputs, slot, 2.0f * frontface - 1.0f, 0 );
-
- if (usage_mask & TGSI_WRITEMASK_Y)
- constant_coef( inputs, slot, 0.0f, 1 ); /* wasted */
-
- if (usage_mask & TGSI_WRITEMASK_Z)
- constant_coef( inputs, slot, 0.0f, 2 ); /* wasted */
-
- if (usage_mask & TGSI_WRITEMASK_W)
- constant_coef( inputs, slot, 0.0f, 3 ); /* wasted */
-}
-
-
-/**
- * Compute the tri->coef[] array dadx, dady, a0 values.
- */
-void lp_setup_tri_coef( struct lp_setup_context *setup,
- struct lp_rast_shader_inputs *inputs,
- const float (*v0)[4],
- const float (*v1)[4],
- const float (*v2)[4],
- boolean frontfacing)
-{
- unsigned fragcoord_usage_mask = TGSI_WRITEMASK_XYZ;
- unsigned slot;
- unsigned i;
- struct lp_tri_info info;
- float dx01 = v0[0][0] - v1[0][0];
- float dy01 = v0[0][1] - v1[0][1];
- float dx20 = v2[0][0] - v0[0][0];
- float dy20 = v2[0][1] - v0[0][1];
- float oneoverarea = 1.0f / (dx01 * dy20 - dx20 * dy01);
-
- info.v0 = v0;
- info.v1 = v1;
- info.v2 = v2;
- info.frontfacing = frontfacing;
- info.x0_center = v0[0][0] - setup->pixel_offset;
- info.y0_center = v0[0][1] - setup->pixel_offset;
- info.dx01_ooa = dx01 * oneoverarea;
- info.dx20_ooa = dx20 * oneoverarea;
- info.dy01_ooa = dy01 * oneoverarea;
- info.dy20_ooa = dy20 * oneoverarea;
-
-
- /* setup interpolation for all the remaining attributes:
- */
- for (slot = 0; slot < setup->fs.nr_inputs; slot++) {
- unsigned vert_attr = setup->fs.input[slot].src_index;
- unsigned usage_mask = setup->fs.input[slot].usage_mask;
-
- switch (setup->fs.input[slot].interp) {
- case LP_INTERP_CONSTANT:
- if (setup->flatshade_first) {
- for (i = 0; i < NUM_CHANNELS; i++)
- if (usage_mask & (1 << i))
- constant_coef(inputs, slot+1, info.v0[vert_attr][i], i);
- }
- else {
- for (i = 0; i < NUM_CHANNELS; i++)
- if (usage_mask & (1 << i))
- constant_coef(inputs, slot+1, info.v2[vert_attr][i], i);
- }
- break;
-
- case LP_INTERP_LINEAR:
- for (i = 0; i < NUM_CHANNELS; i++)
- if (usage_mask & (1 << i))
- linear_coef(inputs, &info, slot+1, vert_attr, i);
- break;
-
- case LP_INTERP_PERSPECTIVE:
- for (i = 0; i < NUM_CHANNELS; i++)
- if (usage_mask & (1 << i))
- perspective_coef(inputs, &info, slot+1, vert_attr, i);
- fragcoord_usage_mask |= TGSI_WRITEMASK_W;
- break;
-
- case LP_INTERP_POSITION:
- /*
- * The generated pixel interpolators will pick up the coeffs from
- * slot 0, so all need to ensure that the usage mask is covers all
- * usages.
- */
- fragcoord_usage_mask |= usage_mask;
- break;
-
- case LP_INTERP_FACING:
- setup_facing_coef(inputs, slot+1, info.frontfacing, usage_mask);
- break;
-
- default:
- assert(0);
- }
- }
-
- /* The internal position input is in slot zero:
- */
- setup_fragcoord_coef(inputs, &info, 0, fragcoord_usage_mask);
-}
-
-#else
-extern void lp_setup_coef_dummy(void);
-void lp_setup_coef_dummy(void)
-{
-}
-
-#endif
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