/**************************************************************************
*
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * Copyright 2010 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* 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 TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * 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 testing
+ * \brief Quad depth / stencil testing
*/
#include "pipe/p_defines.h"
+#include "util/u_format.h"
#include "util/u_memory.h"
+#include "tgsi/tgsi_scan.h"
#include "sp_context.h"
-#include "sp_headers.h"
-#include "sp_surface.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[QUAD_SIZE]; /**< Z values fetched from depth buffer */
+ unsigned qzzzz[QUAD_SIZE]; /**< Z values from the quad */
+ ubyte stencilVals[QUAD_SIZE];
+ struct softpipe_cached_tile *tile;
+};
+
+
+
+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 < 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 < 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_USCALED:
+ for (j = 0; j < 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_USCALED_Z24_UNORM:
+ for (j = 0; j < 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;
+ default:
+ assert(0);
+ }
+}
/**
- * Do depth testing for a quad.
- * Not static since it's used by the stencil code.
+ * 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;
+}
-/*
- * 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...
- */
-void
-sp_depth_test_quad(struct quad_stage *qs, struct quad_header *quad)
+/**
+ * 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 )
{
- struct softpipe_context *softpipe = qs->softpipe;
- struct pipe_surface *ps = softpipe->framebuffer.zsbuf;
- const enum pipe_format format = ps->format;
- unsigned bzzzz[QUAD_SIZE]; /**< Z values fetched from depth buffer */
- unsigned qzzzz[QUAD_SIZE]; /**< Z values from the quad */
- unsigned zmask = 0;
unsigned j;
- struct softpipe_cached_tile *tile
- = sp_get_cached_tile(softpipe, softpipe->zsbuf_cache, quad->input.x0, quad->input.y0);
- assert(ps); /* shouldn't get here if there's no zbuffer */
-
- /*
- * Convert quad's float depth values to int depth values (qzzzz).
+ /* 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.
- *
- * Also, get the zbuffer values (bzzzz) from the cached tile.
*/
- switch (format) {
+ switch (data->format) {
case PIPE_FORMAT_Z16_UNORM:
{
float scale = 65535.0;
for (j = 0; j < QUAD_SIZE; j++) {
- qzzzz[j] = (unsigned) (quad->output.depth[j] * scale);
- }
-
- for (j = 0; j < QUAD_SIZE; j++) {
- int x = quad->input.x0 % TILE_SIZE + (j & 1);
- int y = quad->input.y0 % TILE_SIZE + (j >> 1);
- bzzzz[j] = tile->data.depth16[y][x];
+ data->qzzzz[j] = (unsigned) (quad->output.depth[j] * scale);
}
}
break;
double scale = (double) (uint) ~0UL;
for (j = 0; j < QUAD_SIZE; j++) {
- qzzzz[j] = (unsigned) (quad->output.depth[j] * scale);
+ data->qzzzz[j] = (unsigned) (quad->output.depth[j] * scale);
}
+ }
+ break;
+ case PIPE_FORMAT_Z24X8_UNORM:
+ case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
+ {
+ float scale = (float) ((1 << 24) - 1);
for (j = 0; j < QUAD_SIZE; j++) {
- int x = quad->input.x0 % TILE_SIZE + (j & 1);
- int y = quad->input.y0 % TILE_SIZE + (j >> 1);
- bzzzz[j] = tile->data.depth32[y][x];
+ data->qzzzz[j] = (unsigned) (quad->output.depth[j] * scale);
}
}
break;
case PIPE_FORMAT_X8Z24_UNORM:
- /* fall-through */
- case PIPE_FORMAT_S8Z24_UNORM:
+ case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
{
float scale = (float) ((1 << 24) - 1);
for (j = 0; j < QUAD_SIZE; j++) {
- qzzzz[j] = (unsigned) (quad->output.depth[j] * scale);
+ data->qzzzz[j] = (unsigned) (quad->output.depth[j] * scale);
}
+ }
+ break;
+ default:
+ assert(0);
+ }
+}
- for (j = 0; j < QUAD_SIZE; j++) {
- int x = quad->input.x0 % TILE_SIZE + (j & 1);
- int y = quad->input.y0 % TILE_SIZE + (j >> 1);
- bzzzz[j] = tile->data.depth32[y][x] & 0xffffff;
- }
+
+
+/**
+ * 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 < 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:
- /* fall-through */
- case PIPE_FORMAT_Z24S8_UNORM:
- {
- float scale = (float) ((1 << 24) - 1);
+ case PIPE_FORMAT_Z32_UNORM:
+ for (j = 0; j < 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_USCALED:
+ for (j = 0; j < 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_USCALED_Z24_UNORM:
+ for (j = 0; j < 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 < 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;
+ default:
+ assert(0);
+ }
+}
- for (j = 0; j < QUAD_SIZE; j++) {
- qzzzz[j] = (unsigned) (quad->output.depth[j] * scale);
+
+
+/** 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;
+
+ ref &= valMask;
+
+ switch (func) {
+ case PIPE_FUNC_NEVER:
+ /* passMask = 0x0 */
+ break;
+ case PIPE_FUNC_LESS:
+ for (j = 0; j < QUAD_SIZE; j++) {
+ if (ref < (data->stencilVals[j] & valMask)) {
+ passMask |= (1 << j);
+ }
+ }
+ break;
+ case PIPE_FUNC_EQUAL:
+ for (j = 0; j < QUAD_SIZE; j++) {
+ if (ref == (data->stencilVals[j] & valMask)) {
+ passMask |= (1 << j);
+ }
+ }
+ break;
+ case PIPE_FUNC_LEQUAL:
+ for (j = 0; j < QUAD_SIZE; j++) {
+ if (ref <= (data->stencilVals[j] & valMask)) {
+ passMask |= (1 << j);
}
+ }
+ break;
+ case PIPE_FUNC_GREATER:
+ for (j = 0; j < QUAD_SIZE; j++) {
+ if (ref > (data->stencilVals[j] & valMask)) {
+ passMask |= (1 << j);
+ }
+ }
+ break;
+ case PIPE_FUNC_NOTEQUAL:
+ for (j = 0; j < QUAD_SIZE; j++) {
+ if (ref != (data->stencilVals[j] & valMask)) {
+ passMask |= (1 << j);
+ }
+ }
+ break;
+ case PIPE_FUNC_GEQUAL:
+ for (j = 0; j < QUAD_SIZE; j++) {
+ if (ref >= (data->stencilVals[j] & valMask)) {
+ passMask |= (1 << j);
+ }
+ }
+ break;
+ case PIPE_FUNC_ALWAYS:
+ passMask = MASK_ALL;
+ break;
+ default:
+ assert(0);
+ }
- for (j = 0; j < QUAD_SIZE; j++) {
- int x = quad->input.x0 % TILE_SIZE + (j & 1);
- int y = quad->input.y0 % TILE_SIZE + (j >> 1);
- bzzzz[j] = tile->data.depth32[y][x] >> 8;
+ 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[QUAD_SIZE];
+
+ for (j = 0; j < QUAD_SIZE; j++) {
+ newstencil[j] = data->stencilVals[j];
+ }
+
+ switch (op) {
+ case PIPE_STENCIL_OP_KEEP:
+ /* no-op */
+ break;
+ case PIPE_STENCIL_OP_ZERO:
+ for (j = 0; j < QUAD_SIZE; j++) {
+ if (mask & (1 << j)) {
+ newstencil[j] = 0;
+ }
+ }
+ break;
+ case PIPE_STENCIL_OP_REPLACE:
+ for (j = 0; j < QUAD_SIZE; j++) {
+ if (mask & (1 << j)) {
+ newstencil[j] = ref;
+ }
+ }
+ break;
+ case PIPE_STENCIL_OP_INCR:
+ for (j = 0; j < 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 < 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 < QUAD_SIZE; j++) {
+ if (mask & (1 << j)) {
+ newstencil[j] = data->stencilVals[j] + 1;
+ }
+ }
+ break;
+ case PIPE_STENCIL_OP_DECR_WRAP:
+ for (j = 0; j < QUAD_SIZE; j++) {
+ if (mask & (1 << j)) {
+ newstencil[j] = data->stencilVals[j] - 1;
+ }
+ }
+ break;
+ case PIPE_STENCIL_OP_INVERT:
+ for (j = 0; j < QUAD_SIZE; j++) {
+ if (mask & (1 << j)) {
+ newstencil[j] = ~data->stencilVals[j];
}
}
break;
assert(0);
}
+ /*
+ * update the stencil values
+ */
+ if (wrtMask != STENCIL_MAX) {
+ /* apply bit-wise stencil buffer writemask */
+ for (j = 0; j < QUAD_SIZE; j++) {
+ data->stencilVals[j] = (wrtMask & newstencil[j]) | (~wrtMask & data->stencilVals[j]);
+ }
+ }
+ else {
+ for (j = 0; j < 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 */
* Like this: quad->mask &= (quad->outputs.depth < zzzz);
*/
for (j = 0; j < QUAD_SIZE; j++) {
- if (qzzzz[j] < bzzzz[j])
+ if (data->qzzzz[j] < data->bzzzz[j])
zmask |= 1 << j;
}
break;
case PIPE_FUNC_EQUAL:
for (j = 0; j < QUAD_SIZE; j++) {
- if (qzzzz[j] == bzzzz[j])
+ if (data->qzzzz[j] == data->bzzzz[j])
zmask |= 1 << j;
}
break;
case PIPE_FUNC_LEQUAL:
for (j = 0; j < QUAD_SIZE; j++) {
- if (qzzzz[j] <= bzzzz[j])
+ if (data->qzzzz[j] <= data->bzzzz[j])
zmask |= (1 << j);
}
break;
case PIPE_FUNC_GREATER:
for (j = 0; j < QUAD_SIZE; j++) {
- if (qzzzz[j] > bzzzz[j])
+ if (data->qzzzz[j] > data->bzzzz[j])
zmask |= (1 << j);
}
break;
case PIPE_FUNC_NOTEQUAL:
for (j = 0; j < QUAD_SIZE; j++) {
- if (qzzzz[j] != bzzzz[j])
+ if (data->qzzzz[j] != data->bzzzz[j])
zmask |= (1 << j);
}
break;
case PIPE_FUNC_GEQUAL:
for (j = 0; j < QUAD_SIZE; j++) {
- if (qzzzz[j] >= bzzzz[j])
+ if (data->qzzzz[j] >= data->bzzzz[j])
zmask |= (1 << j);
}
break;
}
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) {
-
- /* This is also efficient with sse / spe instructions:
- */
for (j = 0; j < QUAD_SIZE; j++) {
- if (quad->inout.mask & (1 << j)) {
- bzzzz[j] = qzzzz[j];
- }
+ if (quad->inout.mask & (1 << j)) {
+ data->bzzzz[j] = data->qzzzz[j];
+ }
}
+ }
- /* put updated Z values back into cached tile */
- switch (format) {
- case PIPE_FORMAT_Z16_UNORM:
- for (j = 0; j < 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) bzzzz[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;
+ }
+
+ /* 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);
}
- break;
- case PIPE_FORMAT_X8Z24_UNORM:
- /* fall-through */
- /* (yes, this falls through to a different case than above) */
- case PIPE_FORMAT_Z32_UNORM:
- for (j = 0; j < 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] = bzzzz[j];
+
+ if (zPassOp != PIPE_STENCIL_OP_KEEP) {
+ const unsigned zPassMask = origMask & quad->inout.mask;
+ apply_stencil_op(data, zPassMask, zPassOp, ref, wrtMask);
}
- break;
- case PIPE_FORMAT_S8Z24_UNORM:
- for (j = 0; j < QUAD_SIZE; j++) {
- int x = quad->input.x0 % TILE_SIZE + (j & 1);
- int y = quad->input.y0 % TILE_SIZE + (j >> 1);
- uint s8z24 = tile->data.depth32[y][x];
- s8z24 = (s8z24 & 0xff000000) | bzzzz[j];
- tile->data.depth32[y][x] = s8z24;
+ }
+ 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 int \
+ 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 KILP.
+ */
+static int
+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 );
+ break;
+ 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 */
+};
+
+
+
+/** helper to get number of Z buffer bits */
+static unsigned
+get_depth_bits(struct quad_stage *qs)
+{
+ struct pipe_surface *zsurf = qs->softpipe->framebuffer.zsbuf;
+ if (zsurf)
+ return util_format_get_component_bits(zsurf->format,
+ UTIL_FORMAT_COLORSPACE_ZS, 0);
+ else
+ return 0;
+}
+
+
+
+/**
+ * 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 sp_fragment_shader *fs = qs->softpipe->fs;
+ boolean interp_depth = !fs->info.writes_z;
+ struct depth_data data;
+
+
+ if (qs->softpipe->depth_stencil->alpha.enabled) {
+ nr = alpha_test_quads(qs, quads, nr);
+ }
+
+ if (get_depth_bits(qs) > 0 &&
+ (qs->softpipe->depth_stencil->depth.enabled ||
+ qs->softpipe->depth_stencil->stencil[0].enabled)) {
+
+ 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);
+
+ 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]);
}
- break;
- case PIPE_FORMAT_Z24S8_UNORM:
- for (j = 0; j < QUAD_SIZE; j++) {
- int x = quad->input.x0 % TILE_SIZE + (j & 1);
- int y = quad->input.y0 % TILE_SIZE + (j >> 1);
- uint z24s8 = tile->data.depth32[y][x];
- z24s8 = (z24s8 & 0xff) | (bzzzz[j] << 8);
- tile->data.depth32[y][x] = z24s8;
+
+ if (qs->softpipe->depth_stencil->stencil[0].enabled) {
+ depth_stencil_test_quad(qs, &data, quads[i]);
+ write_depth_stencil_values(&data, quads[i]);
}
- break;
- case PIPE_FORMAT_Z24X8_UNORM:
- for (j = 0; j < 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] = bzzzz[j] << 8;
+ else {
+ if (!depth_test_quad(qs, &data, quads[i]))
+ continue;
+
+ if (qs->softpipe->depth_stencil->depth.writemask)
+ write_depth_stencil_values(&data, quads[i]);
}
- break;
- default:
- assert(0);
+
+ 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_test_quad(struct quad_stage *qs, struct quad_header *quad)
+depth_noop(struct quad_stage *qs,
+ struct quad_header *quads[],
+ unsigned nr)
{
- sp_depth_test_quad(qs, quad);
+ qs->next->run(qs->next, quads, nr);
+}
+
- if (quad->inout.mask)
- qs->next->run(qs->next, quad);
+
+static void
+choose_depth_test(struct quad_stage *qs,
+ struct quad_header *quads[],
+ unsigned nr)
+{
+ boolean interp_depth = !qs->softpipe->fs->info.writes_z;
+
+ boolean alpha = qs->softpipe->depth_stencil->alpha.enabled;
+
+ boolean depth = (get_depth_bits(qs) > 0 &&
+ 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;
+
+ /* default */
+ qs->run = depth_test_quads_fallback;
+
+ /* look for special cases */
+ if (!alpha &&
+ !depth &&
+ !stencil) {
+ qs->run = depth_noop;
+ }
+ else if (!alpha &&
+ interp_depth &&
+ depth &&
+ depthwrite &&
+ !occlusion &&
+ !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)
+
+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)
+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 *
+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 = depth_test_quad;
+ stage->run = choose_depth_test;
stage->destroy = depth_test_destroy;
return stage;
projects / mesa.git / blobdiff