/************************************************************************** * * Copyright 2007 VMware, Inc. * Copyright 2010 VMware, Inc. * 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 THE AUTHORS 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. * **************************************************************************/ /** * \brief Quad depth / stencil testing */ #include "pipe/p_defines.h" #include "util/u_format.h" #include "util/u_math.h" #include "util/u_memory.h" #include "tgsi/tgsi_scan.h" #include "sp_context.h" #include "sp_quad.h" #include "sp_quad_pipe.h" #include "sp_tile_cache.h" #include "sp_state.h" /* for sp_fragment_shader */ struct depth_data { struct pipe_surface *ps; enum pipe_format format; unsigned bzzzz[TGSI_QUAD_SIZE]; /**< Z values fetched from depth buffer */ unsigned qzzzz[TGSI_QUAD_SIZE]; /**< Z values from the quad */ ubyte stencilVals[TGSI_QUAD_SIZE]; boolean use_shader_stencil_refs; ubyte shader_stencil_refs[TGSI_QUAD_SIZE]; struct softpipe_cached_tile *tile; float minval, maxval; bool clamp; }; static void get_depth_stencil_values( struct depth_data *data, const struct quad_header *quad ) { unsigned j; const struct softpipe_cached_tile *tile = data->tile; switch (data->format) { case PIPE_FORMAT_Z16_UNORM: for (j = 0; j < TGSI_QUAD_SIZE; j++) { int x = quad->input.x0 % TILE_SIZE + (j & 1); int y = quad->input.y0 % TILE_SIZE + (j >> 1); data->bzzzz[j] = tile->data.depth16[y][x]; } break; case PIPE_FORMAT_Z32_UNORM: for (j = 0; j < TGSI_QUAD_SIZE; j++) { int x = quad->input.x0 % TILE_SIZE + (j & 1); int y = quad->input.y0 % TILE_SIZE + (j >> 1); data->bzzzz[j] = tile->data.depth32[y][x]; } break; case PIPE_FORMAT_Z24X8_UNORM: case PIPE_FORMAT_Z24_UNORM_S8_UINT: for (j = 0; j < TGSI_QUAD_SIZE; j++) { int x = quad->input.x0 % TILE_SIZE + (j & 1); int y = quad->input.y0 % TILE_SIZE + (j >> 1); data->bzzzz[j] = tile->data.depth32[y][x] & 0xffffff; data->stencilVals[j] = tile->data.depth32[y][x] >> 24; } break; case PIPE_FORMAT_X8Z24_UNORM: case PIPE_FORMAT_S8_UINT_Z24_UNORM: for (j = 0; j < TGSI_QUAD_SIZE; j++) { int x = quad->input.x0 % TILE_SIZE + (j & 1); int y = quad->input.y0 % TILE_SIZE + (j >> 1); data->bzzzz[j] = tile->data.depth32[y][x] >> 8; data->stencilVals[j] = tile->data.depth32[y][x] & 0xff; } break; case PIPE_FORMAT_S8_UINT: for (j = 0; j < TGSI_QUAD_SIZE; j++) { int x = quad->input.x0 % TILE_SIZE + (j & 1); int y = quad->input.y0 % TILE_SIZE + (j >> 1); data->bzzzz[j] = 0; data->stencilVals[j] = tile->data.stencil8[y][x]; } break; case PIPE_FORMAT_Z32_FLOAT: for (j = 0; j < TGSI_QUAD_SIZE; j++) { int x = quad->input.x0 % TILE_SIZE + (j & 1); int y = quad->input.y0 % TILE_SIZE + (j >> 1); data->bzzzz[j] = tile->data.depth32[y][x]; } break; case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT: for (j = 0; j < TGSI_QUAD_SIZE; j++) { int x = quad->input.x0 % TILE_SIZE + (j & 1); int y = quad->input.y0 % TILE_SIZE + (j >> 1); data->bzzzz[j] = tile->data.depth64[y][x] & 0xffffffff; data->stencilVals[j] = (tile->data.depth64[y][x] >> 32) & 0xff; } break; default: assert(0); } } /** * If the shader has not been run, interpolate the depth values * ourselves. */ static void interpolate_quad_depth( struct quad_header *quad ) { const float fx = (float) quad->input.x0; const float fy = (float) quad->input.y0; const float dzdx = quad->posCoef->dadx[2]; const float dzdy = quad->posCoef->dady[2]; const float z0 = quad->posCoef->a0[2] + dzdx * fx + dzdy * fy; quad->output.depth[0] = z0; quad->output.depth[1] = z0 + dzdx; quad->output.depth[2] = z0 + dzdy; quad->output.depth[3] = z0 + dzdx + dzdy; } /** * Compute the depth_data::qzzzz[] values from the float fragment Z values. */ static void convert_quad_depth( struct depth_data *data, const struct quad_header *quad ) { unsigned j; float dvals[TGSI_QUAD_SIZE]; /* Convert quad's float depth values to int depth values (qzzzz). * If the Z buffer stores integer values, we _have_ to do the depth * compares with integers (not floats). Otherwise, the float->int->float * conversion of Z values (which isn't an identity function) will cause * Z-fighting errors. */ if (data->clamp) { for (j = 0; j < TGSI_QUAD_SIZE; j++) { dvals[j] = CLAMP(quad->output.depth[j], data->minval, data->maxval); } } else { for (j = 0; j < TGSI_QUAD_SIZE; j++) { dvals[j] = quad->output.depth[j]; } } switch (data->format) { case PIPE_FORMAT_Z16_UNORM: { float scale = 65535.0; for (j = 0; j < TGSI_QUAD_SIZE; j++) { data->qzzzz[j] = (unsigned) (dvals[j] * scale); } } break; case PIPE_FORMAT_Z32_UNORM: { double scale = (double) (uint) ~0UL; for (j = 0; j < TGSI_QUAD_SIZE; j++) { data->qzzzz[j] = (unsigned) (dvals[j] * scale); } } break; case PIPE_FORMAT_Z24X8_UNORM: case PIPE_FORMAT_Z24_UNORM_S8_UINT: { float scale = (float) ((1 << 24) - 1); for (j = 0; j < TGSI_QUAD_SIZE; j++) { data->qzzzz[j] = (unsigned) (dvals[j] * scale); } } break; case PIPE_FORMAT_X8Z24_UNORM: case PIPE_FORMAT_S8_UINT_Z24_UNORM: { float scale = (float) ((1 << 24) - 1); for (j = 0; j < TGSI_QUAD_SIZE; j++) { data->qzzzz[j] = (unsigned) (dvals[j] * scale); } } break; case PIPE_FORMAT_Z32_FLOAT: case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT: { union fi fui; for (j = 0; j < TGSI_QUAD_SIZE; j++) { fui.f = dvals[j]; data->qzzzz[j] = fui.ui; } } break; default: assert(0); } } /** * Compute the depth_data::shader_stencil_refs[] values from the float * fragment stencil values. */ static void convert_quad_stencil( struct depth_data *data, const struct quad_header *quad ) { unsigned j; data->use_shader_stencil_refs = TRUE; /* Copy quads stencil values */ switch (data->format) { case PIPE_FORMAT_Z24X8_UNORM: case PIPE_FORMAT_Z24_UNORM_S8_UINT: case PIPE_FORMAT_X8Z24_UNORM: case PIPE_FORMAT_S8_UINT_Z24_UNORM: case PIPE_FORMAT_S8_UINT: case PIPE_FORMAT_Z32_FLOAT: case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT: for (j = 0; j < TGSI_QUAD_SIZE; j++) { data->shader_stencil_refs[j] = ((unsigned)(quad->output.stencil[j])); } break; default: assert(0); } } /** * Write data->bzzzz[] values and data->stencilVals into the Z/stencil buffer. */ static void write_depth_stencil_values( struct depth_data *data, struct quad_header *quad ) { struct softpipe_cached_tile *tile = data->tile; unsigned j; /* put updated Z values back into cached tile */ switch (data->format) { case PIPE_FORMAT_Z16_UNORM: for (j = 0; j < TGSI_QUAD_SIZE; j++) { int x = quad->input.x0 % TILE_SIZE + (j & 1); int y = quad->input.y0 % TILE_SIZE + (j >> 1); tile->data.depth16[y][x] = (ushort) data->bzzzz[j]; } break; case PIPE_FORMAT_Z24X8_UNORM: case PIPE_FORMAT_Z32_UNORM: for (j = 0; j < TGSI_QUAD_SIZE; j++) { int x = quad->input.x0 % TILE_SIZE + (j & 1); int y = quad->input.y0 % TILE_SIZE + (j >> 1); tile->data.depth32[y][x] = data->bzzzz[j]; } break; case PIPE_FORMAT_Z24_UNORM_S8_UINT: for (j = 0; j < TGSI_QUAD_SIZE; j++) { int x = quad->input.x0 % TILE_SIZE + (j & 1); int y = quad->input.y0 % TILE_SIZE + (j >> 1); tile->data.depth32[y][x] = (data->stencilVals[j] << 24) | data->bzzzz[j]; } break; case PIPE_FORMAT_S8_UINT_Z24_UNORM: for (j = 0; j < TGSI_QUAD_SIZE; j++) { int x = quad->input.x0 % TILE_SIZE + (j & 1); int y = quad->input.y0 % TILE_SIZE + (j >> 1); tile->data.depth32[y][x] = (data->bzzzz[j] << 8) | data->stencilVals[j]; } break; case PIPE_FORMAT_X8Z24_UNORM: for (j = 0; j < TGSI_QUAD_SIZE; j++) { int x = quad->input.x0 % TILE_SIZE + (j & 1); int y = quad->input.y0 % TILE_SIZE + (j >> 1); tile->data.depth32[y][x] = data->bzzzz[j] << 8; } break; case PIPE_FORMAT_S8_UINT: for (j = 0; j < TGSI_QUAD_SIZE; j++) { int x = quad->input.x0 % TILE_SIZE + (j & 1); int y = quad->input.y0 % TILE_SIZE + (j >> 1); tile->data.stencil8[y][x] = data->stencilVals[j]; } break; case PIPE_FORMAT_Z32_FLOAT: for (j = 0; j < TGSI_QUAD_SIZE; j++) { int x = quad->input.x0 % TILE_SIZE + (j & 1); int y = quad->input.y0 % TILE_SIZE + (j >> 1); tile->data.depth32[y][x] = data->bzzzz[j]; } break; case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT: for (j = 0; j < TGSI_QUAD_SIZE; j++) { int x = quad->input.x0 % TILE_SIZE + (j & 1); int y = quad->input.y0 % TILE_SIZE + (j >> 1); tile->data.depth64[y][x] = (uint64_t)data->bzzzz[j] | ((uint64_t)data->stencilVals[j] << 32); } break; default: assert(0); } } /** Only 8-bit stencil supported */ #define STENCIL_MAX 0xff /** * Do the basic stencil test (compare stencil buffer values against the * reference value. * * \param data->stencilVals the stencil values from the stencil buffer * \param func the stencil func (PIPE_FUNC_x) * \param ref the stencil reference value * \param valMask the stencil value mask indicating which bits of the stencil * values and ref value are to be used. * \return mask indicating which pixels passed the stencil test */ static unsigned do_stencil_test(struct depth_data *data, unsigned func, unsigned ref, unsigned valMask) { unsigned passMask = 0x0; unsigned j; ubyte refs[TGSI_QUAD_SIZE]; for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (data->use_shader_stencil_refs) refs[j] = data->shader_stencil_refs[j] & valMask; else refs[j] = ref & valMask; } switch (func) { case PIPE_FUNC_NEVER: /* passMask = 0x0 */ break; case PIPE_FUNC_LESS: for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (refs[j] < (data->stencilVals[j] & valMask)) { passMask |= (1 << j); } } break; case PIPE_FUNC_EQUAL: for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (refs[j] == (data->stencilVals[j] & valMask)) { passMask |= (1 << j); } } break; case PIPE_FUNC_LEQUAL: for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (refs[j] <= (data->stencilVals[j] & valMask)) { passMask |= (1 << j); } } break; case PIPE_FUNC_GREATER: for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (refs[j] > (data->stencilVals[j] & valMask)) { passMask |= (1 << j); } } break; case PIPE_FUNC_NOTEQUAL: for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (refs[j] != (data->stencilVals[j] & valMask)) { passMask |= (1 << j); } } break; case PIPE_FUNC_GEQUAL: for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (refs[j] >= (data->stencilVals[j] & valMask)) { passMask |= (1 << j); } } break; case PIPE_FUNC_ALWAYS: passMask = MASK_ALL; break; default: assert(0); } return passMask; } /** * Apply the stencil operator to stencil values. * * \param data->stencilVals the stencil buffer values (read and written) * \param mask indicates which pixels to update * \param op the stencil operator (PIPE_STENCIL_OP_x) * \param ref the stencil reference value * \param wrtMask writemask controlling which bits are changed in the * stencil values */ static void apply_stencil_op(struct depth_data *data, unsigned mask, unsigned op, ubyte ref, ubyte wrtMask) { unsigned j; ubyte newstencil[TGSI_QUAD_SIZE]; ubyte refs[TGSI_QUAD_SIZE]; for (j = 0; j < TGSI_QUAD_SIZE; j++) { newstencil[j] = data->stencilVals[j]; if (data->use_shader_stencil_refs) refs[j] = data->shader_stencil_refs[j]; else refs[j] = ref; } switch (op) { case PIPE_STENCIL_OP_KEEP: /* no-op */ break; case PIPE_STENCIL_OP_ZERO: for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (mask & (1 << j)) { newstencil[j] = 0; } } break; case PIPE_STENCIL_OP_REPLACE: for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (mask & (1 << j)) { newstencil[j] = refs[j]; } } break; case PIPE_STENCIL_OP_INCR: for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (mask & (1 << j)) { if (data->stencilVals[j] < STENCIL_MAX) { newstencil[j] = data->stencilVals[j] + 1; } } } break; case PIPE_STENCIL_OP_DECR: for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (mask & (1 << j)) { if (data->stencilVals[j] > 0) { newstencil[j] = data->stencilVals[j] - 1; } } } break; case PIPE_STENCIL_OP_INCR_WRAP: for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (mask & (1 << j)) { newstencil[j] = data->stencilVals[j] + 1; } } break; case PIPE_STENCIL_OP_DECR_WRAP: for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (mask & (1 << j)) { newstencil[j] = data->stencilVals[j] - 1; } } break; case PIPE_STENCIL_OP_INVERT: for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (mask & (1 << j)) { newstencil[j] = ~data->stencilVals[j]; } } break; default: assert(0); } /* * update the stencil values */ if (wrtMask != STENCIL_MAX) { /* apply bit-wise stencil buffer writemask */ for (j = 0; j < TGSI_QUAD_SIZE; j++) { data->stencilVals[j] = (wrtMask & newstencil[j]) | (~wrtMask & data->stencilVals[j]); } } else { for (j = 0; j < TGSI_QUAD_SIZE; j++) { data->stencilVals[j] = newstencil[j]; } } } /** * To increase efficiency, we should probably have multiple versions * of this function that are specifically for Z16, Z32 and FP Z buffers. * Try to effectively do that with codegen... */ static boolean depth_test_quad(struct quad_stage *qs, struct depth_data *data, struct quad_header *quad) { struct softpipe_context *softpipe = qs->softpipe; unsigned zmask = 0; unsigned j; switch (softpipe->depth_stencil->depth.func) { case PIPE_FUNC_NEVER: /* zmask = 0 */ break; case PIPE_FUNC_LESS: /* Note this is pretty much a single sse or cell instruction. * Like this: quad->mask &= (quad->outputs.depth < zzzz); */ for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (data->qzzzz[j] < data->bzzzz[j]) zmask |= 1 << j; } break; case PIPE_FUNC_EQUAL: for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (data->qzzzz[j] == data->bzzzz[j]) zmask |= 1 << j; } break; case PIPE_FUNC_LEQUAL: for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (data->qzzzz[j] <= data->bzzzz[j]) zmask |= (1 << j); } break; case PIPE_FUNC_GREATER: for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (data->qzzzz[j] > data->bzzzz[j]) zmask |= (1 << j); } break; case PIPE_FUNC_NOTEQUAL: for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (data->qzzzz[j] != data->bzzzz[j]) zmask |= (1 << j); } break; case PIPE_FUNC_GEQUAL: for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (data->qzzzz[j] >= data->bzzzz[j]) zmask |= (1 << j); } break; case PIPE_FUNC_ALWAYS: zmask = MASK_ALL; break; default: assert(0); } quad->inout.mask &= zmask; if (quad->inout.mask == 0) return FALSE; /* Update our internal copy only if writemask set. Even if * depth.writemask is FALSE, may still need to write out buffer * data due to stencil changes. */ if (softpipe->depth_stencil->depth.writemask) { for (j = 0; j < TGSI_QUAD_SIZE; j++) { if (quad->inout.mask & (1 << j)) { data->bzzzz[j] = data->qzzzz[j]; } } } return TRUE; } /** * Do stencil (and depth) testing. Stenciling depends on the outcome of * depth testing. */ static void depth_stencil_test_quad(struct quad_stage *qs, struct depth_data *data, struct quad_header *quad) { struct softpipe_context *softpipe = qs->softpipe; unsigned func, zFailOp, zPassOp, failOp; ubyte ref, wrtMask, valMask; uint face = quad->input.facing; if (!softpipe->depth_stencil->stencil[1].enabled) { /* single-sided stencil test, use front (face=0) state */ face = 0; } /* 0 = front-face, 1 = back-face */ assert(face == 0 || face == 1); /* choose front or back face function, operator, etc */ /* XXX we could do these initializations once per primitive */ func = softpipe->depth_stencil->stencil[face].func; failOp = softpipe->depth_stencil->stencil[face].fail_op; zFailOp = softpipe->depth_stencil->stencil[face].zfail_op; zPassOp = softpipe->depth_stencil->stencil[face].zpass_op; ref = softpipe->stencil_ref.ref_value[face]; wrtMask = softpipe->depth_stencil->stencil[face].writemask; valMask = softpipe->depth_stencil->stencil[face].valuemask; /* do the stencil test first */ { unsigned passMask, failMask; passMask = do_stencil_test(data, func, ref, valMask); failMask = quad->inout.mask & ~passMask; quad->inout.mask &= passMask; if (failOp != PIPE_STENCIL_OP_KEEP) { apply_stencil_op(data, failMask, failOp, ref, wrtMask); } } if (quad->inout.mask) { /* now the pixels that passed the stencil test are depth tested */ if (softpipe->depth_stencil->depth.enabled) { const unsigned origMask = quad->inout.mask; depth_test_quad(qs, data, quad); /* quad->mask is updated */ /* update stencil buffer values according to z pass/fail result */ if (zFailOp != PIPE_STENCIL_OP_KEEP) { const unsigned zFailMask = origMask & ~quad->inout.mask; apply_stencil_op(data, zFailMask, zFailOp, ref, wrtMask); } if (zPassOp != PIPE_STENCIL_OP_KEEP) { const unsigned zPassMask = origMask & quad->inout.mask; apply_stencil_op(data, zPassMask, zPassOp, ref, wrtMask); } } else { /* no depth test, apply Zpass operator to stencil buffer values */ apply_stencil_op(data, quad->inout.mask, zPassOp, ref, wrtMask); } } } #define ALPHATEST( FUNC, COMP ) \ static unsigned \ alpha_test_quads_##FUNC( struct quad_stage *qs, \ struct quad_header *quads[], \ unsigned nr ) \ { \ const float ref = qs->softpipe->depth_stencil->alpha.ref_value; \ const uint cbuf = 0; /* only output[0].alpha is tested */ \ unsigned pass_nr = 0; \ unsigned i; \ \ for (i = 0; i < nr; i++) { \ const float *aaaa = quads[i]->output.color[cbuf][3]; \ unsigned passMask = 0; \ \ if (aaaa[0] COMP ref) passMask |= (1 << 0); \ if (aaaa[1] COMP ref) passMask |= (1 << 1); \ if (aaaa[2] COMP ref) passMask |= (1 << 2); \ if (aaaa[3] COMP ref) passMask |= (1 << 3); \ \ quads[i]->inout.mask &= passMask; \ \ if (quads[i]->inout.mask) \ quads[pass_nr++] = quads[i]; \ } \ \ return pass_nr; \ } ALPHATEST( LESS, < ) ALPHATEST( EQUAL, == ) ALPHATEST( LEQUAL, <= ) ALPHATEST( GREATER, > ) ALPHATEST( NOTEQUAL, != ) ALPHATEST( GEQUAL, >= ) /* XXX: Incorporate into shader using KILL_IF. */ static unsigned alpha_test_quads(struct quad_stage *qs, struct quad_header *quads[], unsigned nr) { switch (qs->softpipe->depth_stencil->alpha.func) { case PIPE_FUNC_LESS: return alpha_test_quads_LESS( qs, quads, nr ); case PIPE_FUNC_EQUAL: return alpha_test_quads_EQUAL( qs, quads, nr ); case PIPE_FUNC_LEQUAL: return alpha_test_quads_LEQUAL( qs, quads, nr ); case PIPE_FUNC_GREATER: return alpha_test_quads_GREATER( qs, quads, nr ); case PIPE_FUNC_NOTEQUAL: return alpha_test_quads_NOTEQUAL( qs, quads, nr ); case PIPE_FUNC_GEQUAL: return alpha_test_quads_GEQUAL( qs, quads, nr ); case PIPE_FUNC_ALWAYS: return nr; case PIPE_FUNC_NEVER: default: return 0; } } static unsigned mask_count[16] = { 0, /* 0x0 */ 1, /* 0x1 */ 1, /* 0x2 */ 2, /* 0x3 */ 1, /* 0x4 */ 2, /* 0x5 */ 2, /* 0x6 */ 3, /* 0x7 */ 1, /* 0x8 */ 2, /* 0x9 */ 2, /* 0xa */ 3, /* 0xb */ 2, /* 0xc */ 3, /* 0xd */ 3, /* 0xe */ 4, /* 0xf */ }; /** * General depth/stencil test function. Used when there's no fast-path. */ static void depth_test_quads_fallback(struct quad_stage *qs, struct quad_header *quads[], unsigned nr) { unsigned i, pass = 0; const struct tgsi_shader_info *fsInfo = &qs->softpipe->fs_variant->info; boolean interp_depth = !fsInfo->writes_z; boolean shader_stencil_ref = fsInfo->writes_stencil; struct depth_data data; unsigned vp_idx = quads[0]->input.viewport_index; data.use_shader_stencil_refs = FALSE; if (qs->softpipe->depth_stencil->alpha.enabled) { nr = alpha_test_quads(qs, quads, nr); } if (qs->softpipe->framebuffer.zsbuf && (qs->softpipe->depth_stencil->depth.enabled || qs->softpipe->depth_stencil->stencil[0].enabled)) { float near_val, far_val; data.ps = qs->softpipe->framebuffer.zsbuf; data.format = data.ps->format; data.tile = sp_get_cached_tile(qs->softpipe->zsbuf_cache, quads[0]->input.x0, quads[0]->input.y0, quads[0]->input.layer); data.clamp = !qs->softpipe->rasterizer->depth_clip; near_val = qs->softpipe->viewports[vp_idx].translate[2] - qs->softpipe->viewports[vp_idx].scale[2]; far_val = near_val + (qs->softpipe->viewports[vp_idx].scale[2] * 2.0); data.minval = MIN2(near_val, far_val); data.maxval = MAX2(near_val, far_val); for (i = 0; i < nr; i++) { get_depth_stencil_values(&data, quads[i]); if (qs->softpipe->depth_stencil->depth.enabled) { if (interp_depth) interpolate_quad_depth(quads[i]); convert_quad_depth(&data, quads[i]); } if (qs->softpipe->depth_stencil->stencil[0].enabled) { if (shader_stencil_ref) convert_quad_stencil(&data, quads[i]); depth_stencil_test_quad(qs, &data, quads[i]); write_depth_stencil_values(&data, quads[i]); } else { if (!depth_test_quad(qs, &data, quads[i])) continue; if (qs->softpipe->depth_stencil->depth.writemask) write_depth_stencil_values(&data, quads[i]); } quads[pass++] = quads[i]; } nr = pass; } if (qs->softpipe->active_query_count) { for (i = 0; i < nr; i++) qs->softpipe->occlusion_count += mask_count[quads[i]->inout.mask]; } if (nr) qs->next->run(qs->next, quads, nr); } /** * Special-case Z testing for 16-bit Zbuffer and Z buffer writes enabled. */ #define NAME depth_interp_z16_less_write #define OPERATOR < #include "sp_quad_depth_test_tmp.h" #define NAME depth_interp_z16_equal_write #define OPERATOR == #include "sp_quad_depth_test_tmp.h" #define NAME depth_interp_z16_lequal_write #define OPERATOR <= #include "sp_quad_depth_test_tmp.h" #define NAME depth_interp_z16_greater_write #define OPERATOR > #include "sp_quad_depth_test_tmp.h" #define NAME depth_interp_z16_notequal_write #define OPERATOR != #include "sp_quad_depth_test_tmp.h" #define NAME depth_interp_z16_gequal_write #define OPERATOR >= #include "sp_quad_depth_test_tmp.h" #define NAME depth_interp_z16_always_write #define ALWAYS 1 #include "sp_quad_depth_test_tmp.h" static void depth_noop(struct quad_stage *qs, struct quad_header *quads[], unsigned nr) { qs->next->run(qs->next, quads, nr); } static void choose_depth_test(struct quad_stage *qs, struct quad_header *quads[], unsigned nr) { const struct tgsi_shader_info *fsInfo = &qs->softpipe->fs_variant->info; boolean interp_depth = !fsInfo->writes_z; boolean alpha = qs->softpipe->depth_stencil->alpha.enabled; boolean depth = qs->softpipe->depth_stencil->depth.enabled; unsigned depthfunc = qs->softpipe->depth_stencil->depth.func; boolean stencil = qs->softpipe->depth_stencil->stencil[0].enabled; boolean depthwrite = qs->softpipe->depth_stencil->depth.writemask; boolean occlusion = qs->softpipe->active_query_count; boolean clipped = !qs->softpipe->rasterizer->depth_clip; if(!qs->softpipe->framebuffer.zsbuf) depth = depthwrite = stencil = FALSE; /* default */ qs->run = depth_test_quads_fallback; /* look for special cases */ if (!alpha && !depth && !occlusion && !clipped && !stencil) { qs->run = depth_noop; } else if (!alpha && interp_depth && depth && depthwrite && !occlusion && !clipped && !stencil) { if (qs->softpipe->framebuffer.zsbuf->format == PIPE_FORMAT_Z16_UNORM) { switch (depthfunc) { case PIPE_FUNC_NEVER: qs->run = depth_test_quads_fallback; break; case PIPE_FUNC_LESS: qs->run = depth_interp_z16_less_write; break; case PIPE_FUNC_EQUAL: qs->run = depth_interp_z16_equal_write; break; case PIPE_FUNC_LEQUAL: qs->run = depth_interp_z16_lequal_write; break; case PIPE_FUNC_GREATER: qs->run = depth_interp_z16_greater_write; break; case PIPE_FUNC_NOTEQUAL: qs->run = depth_interp_z16_notequal_write; break; case PIPE_FUNC_GEQUAL: qs->run = depth_interp_z16_gequal_write; break; case PIPE_FUNC_ALWAYS: qs->run = depth_interp_z16_always_write; break; default: qs->run = depth_test_quads_fallback; break; } } } /* next quad/fragment stage */ qs->run( qs, quads, nr ); } static void depth_test_begin(struct quad_stage *qs) { qs->run = choose_depth_test; qs->next->begin(qs->next); } static void depth_test_destroy(struct quad_stage *qs) { FREE( qs ); } struct quad_stage * sp_quad_depth_test_stage(struct softpipe_context *softpipe) { struct quad_stage *stage = CALLOC_STRUCT(quad_stage); stage->softpipe = softpipe; stage->begin = depth_test_begin; stage->run = choose_depth_test; stage->destroy = depth_test_destroy; return stage; }