mirror of
https://gitlab.freedesktop.org/mesa/mesa.git
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328c29d600
Co-authored-by: Mike Blumenkrantz <michael.blumenkrantz@gmail.com> Reviewed-by: Marek Olšák <marek.olsak@amd.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31128>
290 lines
7.5 KiB
C
290 lines
7.5 KiB
C
/**************************************************************************
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*
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* Copyright 2009-2010 VMware, Inc. 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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* @file
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* Framebuffer utility functions.
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*
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* @author Brian Paul
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*/
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#include "pipe/p_screen.h"
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#include "pipe/p_state.h"
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#include "pipe/p_defines.h"
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#include "util/u_inlines.h"
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#include "util/u_memory.h"
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#include "util/u_framebuffer.h"
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/**
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* Compare pipe_framebuffer_state objects.
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* \return TRUE if same, FALSE if different
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*/
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bool
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util_framebuffer_state_equal(const struct pipe_framebuffer_state *dst,
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const struct pipe_framebuffer_state *src)
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{
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unsigned i;
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if (dst->width != src->width ||
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dst->height != src->height)
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return false;
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if (dst->samples != src->samples ||
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dst->layers != src->layers)
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return false;
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if (dst->nr_cbufs != src->nr_cbufs) {
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return false;
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}
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for (i = 0; i < src->nr_cbufs; i++) {
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if (dst->cbufs[i] != src->cbufs[i]) {
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return false;
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}
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}
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if (dst->zsbuf != src->zsbuf) {
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return false;
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}
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if (dst->resolve != src->resolve) {
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return false;
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}
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return true;
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}
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/**
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* Copy framebuffer state from src to dst, updating refcounts.
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*/
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void
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util_copy_framebuffer_state(struct pipe_framebuffer_state *dst,
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const struct pipe_framebuffer_state *src)
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{
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unsigned i;
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if (src) {
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dst->width = src->width;
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dst->height = src->height;
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dst->samples = src->samples;
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dst->layers = src->layers;
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for (i = 0; i < src->nr_cbufs; i++)
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pipe_surface_reference(&dst->cbufs[i], src->cbufs[i]);
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/* Set remaining dest cbuf pointers to NULL */
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for ( ; i < ARRAY_SIZE(dst->cbufs); i++)
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pipe_surface_reference(&dst->cbufs[i], NULL);
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dst->nr_cbufs = src->nr_cbufs;
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dst->viewmask = src->viewmask;
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pipe_surface_reference(&dst->zsbuf, src->zsbuf);
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pipe_resource_reference(&dst->resolve, src->resolve);
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} else {
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dst->width = 0;
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dst->height = 0;
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dst->samples = 0;
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dst->layers = 0;
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for (i = 0 ; i < ARRAY_SIZE(dst->cbufs); i++)
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pipe_surface_reference(&dst->cbufs[i], NULL);
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dst->nr_cbufs = 0;
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dst->viewmask = 0;
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pipe_surface_reference(&dst->zsbuf, NULL);
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pipe_resource_reference(&dst->resolve, NULL);
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}
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}
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void
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util_unreference_framebuffer_state(struct pipe_framebuffer_state *fb)
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{
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unsigned i;
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for (i = 0; i < fb->nr_cbufs; i++) {
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pipe_surface_reference(&fb->cbufs[i], NULL);
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}
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pipe_surface_reference(&fb->zsbuf, NULL);
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pipe_resource_reference(&fb->resolve, NULL);
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fb->samples = fb->layers = 0;
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fb->width = fb->height = 0;
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fb->nr_cbufs = 0;
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fb->viewmask = 0;
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}
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/* Where multiple sizes are allowed for framebuffer surfaces, find the
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* minimum width and height of all bound surfaces.
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*/
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bool
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util_framebuffer_min_size(const struct pipe_framebuffer_state *fb,
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unsigned *width,
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unsigned *height)
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{
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unsigned w = ~0;
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unsigned h = ~0;
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unsigned i;
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for (i = 0; i < fb->nr_cbufs; i++) {
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if (!fb->cbufs[i])
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continue;
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w = MIN2(w, fb->cbufs[i]->width);
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h = MIN2(h, fb->cbufs[i]->height);
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}
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if (fb->zsbuf) {
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w = MIN2(w, fb->zsbuf->width);
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h = MIN2(h, fb->zsbuf->height);
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}
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if (w == ~0u) {
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*width = 0;
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*height = 0;
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return false;
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}
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else {
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*width = w;
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*height = h;
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return true;
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}
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}
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/**
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* Return the number of layers set in the framebuffer state.
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*/
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unsigned
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util_framebuffer_get_num_layers(const struct pipe_framebuffer_state *fb)
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{
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unsigned i, num_layers = 0;
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/**
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* In the case of ARB_framebuffer_no_attachment
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* we obtain the number of layers directly from
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* the framebuffer state.
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*/
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if (!(fb->nr_cbufs || fb->zsbuf))
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return fb->layers;
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for (i = 0; i < fb->nr_cbufs; i++) {
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if (fb->cbufs[i]) {
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unsigned num = fb->cbufs[i]->u.tex.last_layer -
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fb->cbufs[i]->u.tex.first_layer + 1;
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num_layers = MAX2(num_layers, num);
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}
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}
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if (fb->zsbuf) {
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unsigned num = fb->zsbuf->u.tex.last_layer -
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fb->zsbuf->u.tex.first_layer + 1;
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num_layers = MAX2(num_layers, num);
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}
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return num_layers;
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}
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/**
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* Return the number of MSAA samples.
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*/
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unsigned
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util_framebuffer_get_num_samples(const struct pipe_framebuffer_state *fb)
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{
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unsigned i;
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/**
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* In the case of ARB_framebuffer_no_attachment
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* we obtain the number of samples directly from
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* the framebuffer state.
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*
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* NOTE: fb->samples may wind up as zero due to memset()'s on internal
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* driver structures on their initialization and so we take the
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* MAX here to ensure we have a valid number of samples. However,
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* if samples is legitimately not getting set somewhere
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* multi-sampling will evidently break.
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*/
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if (!(fb->nr_cbufs || fb->zsbuf))
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return MAX2(fb->samples, 1);
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/**
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* If a driver doesn't advertise PIPE_CAP_SURFACE_SAMPLE_COUNT,
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* pipe_surface::nr_samples will always be 0.
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*/
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for (i = 0; i < fb->nr_cbufs; i++) {
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if (fb->cbufs[i]) {
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return MAX3(1, fb->cbufs[i]->texture->nr_samples,
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fb->cbufs[i]->nr_samples);
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}
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}
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if (fb->zsbuf) {
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return MAX3(1, fb->zsbuf->texture->nr_samples,
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fb->zsbuf->nr_samples);
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}
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return MAX2(fb->samples, 1);
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}
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/**
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* Flip the sample location state along the Y axis.
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*/
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void
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util_sample_locations_flip_y(struct pipe_screen *screen, unsigned fb_height,
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unsigned samples, uint8_t *locations)
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{
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unsigned row, i, shift, grid_width, grid_height;
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uint8_t new_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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screen->get_sample_pixel_grid(screen, samples, &grid_width, &grid_height);
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shift = fb_height % grid_height;
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for (row = 0; row < grid_height; row++) {
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unsigned row_size = grid_width * samples;
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for (i = 0; i < row_size; i++) {
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unsigned dest_row = grid_height - row - 1;
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/* this relies on unsigned integer wraparound behaviour */
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dest_row = (dest_row - shift) % grid_height;
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new_locations[dest_row * row_size + i] = locations[row * row_size + i];
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}
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}
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memcpy(locations, new_locations, grid_width * grid_height * samples);
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}
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