156 lines
5.5 KiB
C
156 lines
5.5 KiB
C
/**************************************************************************
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*
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* Copyright 2010 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 THE AUTHORS 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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#include "st_context.h"
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#include "pipe/p_screen.h"
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#include "pipe/p_context.h"
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#include "st_atom.h"
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#include "st_program.h"
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#include "st_util.h"
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#include "cso_cache/cso_context.h"
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#include "util/u_framebuffer.h"
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#include "main/framebuffer.h"
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/**
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* Update the sample locations
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*/
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static void
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update_sample_locations(struct st_context *st)
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{
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struct gl_framebuffer *fb = st->ctx->DrawBuffer;
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if (!st->ctx->Extensions.ARB_sample_locations)
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return;
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if (fb->ProgrammableSampleLocations) {
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unsigned grid_width, grid_height, size, pixel, sample_index;
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unsigned samples = st->state.fb_num_samples;
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bool sample_location_pixel_grid = fb->SampleLocationPixelGrid;
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uint8_t locations[
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PIPE_MAX_SAMPLE_LOCATION_GRID_SIZE *
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PIPE_MAX_SAMPLE_LOCATION_GRID_SIZE * 32];
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st->screen->get_sample_pixel_grid(st->screen, samples,
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&grid_width, &grid_height);
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size = grid_width * grid_height * samples;
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/**
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* when a dimension is greater than MAX_SAMPLE_LOCATION_GRID_SIZE,
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* st->ctx->Driver.GetSamplePixelGrid() returns 1 for both dimensions.
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*/
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if (grid_width > MAX_SAMPLE_LOCATION_GRID_SIZE ||
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grid_height > MAX_SAMPLE_LOCATION_GRID_SIZE)
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sample_location_pixel_grid = false;
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for (pixel = 0; pixel < grid_width * grid_height; pixel++) {
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for (sample_index = 0; sample_index < samples; sample_index++) {
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int table_index = sample_index;
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float x = 0.5f, y = 0.5f;
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uint8_t loc;
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if (sample_location_pixel_grid)
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table_index = pixel * samples + sample_index;
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if (fb->SampleLocationTable) {
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x = fb->SampleLocationTable[table_index*2];
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y = fb->SampleLocationTable[table_index*2+1];
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}
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if (st->state.fb_orientation == Y_0_BOTTOM)
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y = 1.0 - y;
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loc = roundf(CLAMP(x * 16.0f, 0.0f, 15.0f));
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loc |= (int)roundf(CLAMP(y * 16.0f, 0.0f, 15.0f)) << 4;
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locations[pixel * samples + sample_index] = loc;
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}
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}
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util_sample_locations_flip_y(
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st->screen, st->state.fb_height, samples, locations);
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if (!st->state.enable_sample_locations ||
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st->state.sample_locations_samples != samples ||
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memcmp(locations, st->state.sample_locations, size) != 0) {
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st->pipe->set_sample_locations( st->pipe, size, locations);
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st->state.sample_locations_samples = samples;
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memcpy(st->state.sample_locations, locations, size);
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}
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} else if (st->state.enable_sample_locations) {
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st->pipe->set_sample_locations(st->pipe, 0, NULL);
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}
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st->state.enable_sample_locations = fb->ProgrammableSampleLocations;
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}
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/* Update the sample mask and locations for MSAA.
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*/
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void
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st_update_sample_state(struct st_context *st)
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{
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unsigned sample_mask = 0xffffffff;
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unsigned sample_count = st->state.fb_num_samples;
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if (_mesa_is_multisample_enabled(st->ctx) && sample_count > 1) {
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/* unlike in gallium/d3d10 the mask is only active if msaa is enabled */
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if (st->ctx->Multisample.SampleCoverage) {
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unsigned nr_bits = (unsigned)
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(st->ctx->Multisample.SampleCoverageValue * (float) sample_count);
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/* there's lot of ways how to do this. We just use first few bits,
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* since we have no knowledge of sample positions here. When
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* app-supplied mask though is used too might need to be smarter.
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* Also, there's an interface restriction here in theory it is
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* encouraged this mask not be the same at each pixel.
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*/
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sample_mask = (1 << nr_bits) - 1;
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if (st->ctx->Multisample.SampleCoverageInvert)
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sample_mask = ~sample_mask;
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}
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if (st->ctx->Multisample.SampleMask)
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sample_mask &= st->ctx->Multisample.SampleMaskValue;
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}
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cso_set_sample_mask(st->cso_context, sample_mask);
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update_sample_locations(st);
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}
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void
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st_update_sample_shading(struct st_context *st)
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{
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if (!st->fp)
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return;
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if (!st->ctx->Extensions.ARB_sample_shading)
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return;
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cso_set_min_samples(st->cso_context,
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_mesa_get_min_invocations_per_fragment(st->ctx, st->fp));
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}
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