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Diffstat (limited to 'src/gallium/drivers/softpipe/sp_tile_cache.c')
-rw-r--r--src/gallium/drivers/softpipe/sp_tile_cache.c614
1 files changed, 614 insertions, 0 deletions
diff --git a/src/gallium/drivers/softpipe/sp_tile_cache.c b/src/gallium/drivers/softpipe/sp_tile_cache.c
new file mode 100644
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+++ b/src/gallium/drivers/softpipe/sp_tile_cache.c
@@ -0,0 +1,614 @@
+/**************************************************************************
+ *
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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 TUNGSTEN GRAPHICS 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.
+ *
+ **************************************************************************/
+
+/**
+ * Framebuffer/surface tile caching.
+ *
+ * Author:
+ * Brian Paul
+ */
+
+#include "pipe/p_inlines.h"
+#include "util/u_memory.h"
+#include "util/u_tile.h"
+#include "sp_context.h"
+#include "sp_surface.h"
+#include "sp_texture.h"
+#include "sp_tile_cache.h"
+
+#define NUM_ENTRIES 32
+
+
+/** XXX move these */
+#define MAX_WIDTH 2048
+#define MAX_HEIGHT 2048
+
+
+struct softpipe_tile_cache
+{
+ struct pipe_screen *screen;
+ struct pipe_surface *surface; /**< the surface we're caching */
+ void *surface_map;
+ struct pipe_texture *texture; /**< if caching a texture */
+ struct softpipe_cached_tile entries[NUM_ENTRIES];
+ uint clear_flags[(MAX_WIDTH / TILE_SIZE) * (MAX_HEIGHT / TILE_SIZE) / 32];
+ float clear_color[4];
+ uint clear_val;
+ boolean depth_stencil; /** Is the surface a depth/stencil format? */
+
+ struct pipe_surface *tex_surf;
+ void *tex_surf_map;
+ int tex_face, tex_level, tex_z;
+
+ struct softpipe_cached_tile tile; /**< scratch tile for clears */
+};
+
+
+/**
+ * Return the position in the cache for the tile that contains win pos (x,y).
+ * We currently use a direct mapped cache so this is like a hack key.
+ * At some point we should investige something more sophisticated, like
+ * a LRU replacement policy.
+ */
+#define CACHE_POS(x, y) \
+ (((x) / TILE_SIZE + ((y) / TILE_SIZE) * 5) % NUM_ENTRIES)
+
+
+
+/**
+ * Is the tile at (x,y) in cleared state?
+ */
+static INLINE uint
+is_clear_flag_set(const uint *bitvec, int x, int y)
+{
+ int pos, bit;
+ x /= TILE_SIZE;
+ y /= TILE_SIZE;
+ pos = y * (MAX_WIDTH / TILE_SIZE) + x;
+ assert(pos / 32 < (MAX_WIDTH / TILE_SIZE) * (MAX_HEIGHT / TILE_SIZE) / 32);
+ bit = bitvec[pos / 32] & (1 << (pos & 31));
+ return bit;
+}
+
+
+/**
+ * Mark the tile at (x,y) as not cleared.
+ */
+static INLINE void
+clear_clear_flag(uint *bitvec, int x, int y)
+{
+ int pos;
+ x /= TILE_SIZE;
+ y /= TILE_SIZE;
+ pos = y * (MAX_WIDTH / TILE_SIZE) + x;
+ assert(pos / 32 < (MAX_WIDTH / TILE_SIZE) * (MAX_HEIGHT / TILE_SIZE) / 32);
+ bitvec[pos / 32] &= ~(1 << (pos & 31));
+}
+
+
+struct softpipe_tile_cache *
+sp_create_tile_cache( struct pipe_screen *screen )
+{
+ struct softpipe_tile_cache *tc;
+ uint pos;
+
+ tc = CALLOC_STRUCT( softpipe_tile_cache );
+ if (tc) {
+ tc->screen = screen;
+ for (pos = 0; pos < NUM_ENTRIES; pos++) {
+ tc->entries[pos].x =
+ tc->entries[pos].y = -1;
+ }
+ }
+ return tc;
+}
+
+
+void
+sp_destroy_tile_cache(struct softpipe_tile_cache *tc)
+{
+ uint pos;
+
+ for (pos = 0; pos < NUM_ENTRIES; pos++) {
+ /*assert(tc->entries[pos].x < 0);*/
+ }
+ if (tc->surface) {
+ pipe_surface_reference(&tc->surface, NULL);
+ }
+ if (tc->tex_surf) {
+ pipe_surface_reference(&tc->tex_surf, NULL);
+ }
+
+ FREE( tc );
+}
+
+
+/**
+ * Specify the surface to cache.
+ */
+void
+sp_tile_cache_set_surface(struct softpipe_tile_cache *tc,
+ struct pipe_surface *ps)
+{
+ assert(!tc->texture);
+
+ if (tc->surface_map) {
+ tc->screen->surface_unmap(tc->screen, tc->surface);
+ tc->surface_map = NULL;
+ }
+
+ pipe_surface_reference(&tc->surface, ps);
+
+ if (tc->surface) {
+ if (tc->surface_map) /* XXX: this is always NULL!? */
+ tc->surface_map = tc->screen->surface_map(tc->screen, tc->surface,
+ PIPE_BUFFER_USAGE_CPU_READ |
+ PIPE_BUFFER_USAGE_CPU_WRITE);
+
+ tc->depth_stencil = (ps->format == PIPE_FORMAT_S8Z24_UNORM ||
+ ps->format == PIPE_FORMAT_X8Z24_UNORM ||
+ ps->format == PIPE_FORMAT_Z24S8_UNORM ||
+ ps->format == PIPE_FORMAT_Z24X8_UNORM ||
+ ps->format == PIPE_FORMAT_Z16_UNORM ||
+ ps->format == PIPE_FORMAT_Z32_UNORM ||
+ ps->format == PIPE_FORMAT_S8_UNORM);
+ }
+}
+
+
+/**
+ * Return the surface being cached.
+ */
+struct pipe_surface *
+sp_tile_cache_get_surface(struct softpipe_tile_cache *tc)
+{
+ return tc->surface;
+}
+
+
+void
+sp_tile_cache_map_surfaces(struct softpipe_tile_cache *tc)
+{
+ if (tc->surface && !tc->surface_map)
+ tc->surface_map = tc->screen->surface_map(tc->screen, tc->surface,
+ PIPE_BUFFER_USAGE_CPU_WRITE |
+ PIPE_BUFFER_USAGE_CPU_READ);
+
+ if (tc->tex_surf && !tc->tex_surf_map)
+ tc->tex_surf_map = tc->screen->surface_map(tc->screen, tc->tex_surf,
+ PIPE_BUFFER_USAGE_CPU_READ);
+}
+
+
+void
+sp_tile_cache_unmap_surfaces(struct softpipe_tile_cache *tc)
+{
+ if (tc->surface_map) {
+ tc->screen->surface_unmap(tc->screen, tc->surface);
+ tc->surface_map = NULL;
+ }
+
+ if (tc->tex_surf_map) {
+ tc->screen->surface_unmap(tc->screen, tc->tex_surf);
+ tc->tex_surf_map = NULL;
+ }
+}
+
+
+/**
+ * Specify the texture to cache.
+ */
+void
+sp_tile_cache_set_texture(struct pipe_context *pipe,
+ struct softpipe_tile_cache *tc,
+ struct pipe_texture *texture)
+{
+ uint i;
+
+ assert(!tc->surface);
+
+ pipe_texture_reference(&tc->texture, texture);
+
+ if (tc->tex_surf_map) {
+ tc->screen->surface_unmap(tc->screen, tc->tex_surf);
+ tc->tex_surf_map = NULL;
+ }
+ pipe_surface_reference(&tc->tex_surf, NULL);
+
+ /* mark as entries as invalid/empty */
+ /* XXX we should try to avoid this when the teximage hasn't changed */
+ for (i = 0; i < NUM_ENTRIES; i++) {
+ tc->entries[i].x = -1;
+ }
+
+ tc->tex_face = -1; /* any invalid value here */
+}
+
+
+/**
+ * Set pixels in a tile to the given clear color/value, float.
+ */
+static void
+clear_tile_rgba(struct softpipe_cached_tile *tile,
+ enum pipe_format format,
+ const float clear_value[4])
+{
+ if (clear_value[0] == 0.0 &&
+ clear_value[1] == 0.0 &&
+ clear_value[2] == 0.0 &&
+ clear_value[3] == 0.0) {
+ memset(tile->data.color, 0, sizeof(tile->data.color));
+ }
+ else {
+ uint i, j;
+ for (i = 0; i < TILE_SIZE; i++) {
+ for (j = 0; j < TILE_SIZE; j++) {
+ tile->data.color[i][j][0] = clear_value[0];
+ tile->data.color[i][j][1] = clear_value[1];
+ tile->data.color[i][j][2] = clear_value[2];
+ tile->data.color[i][j][3] = clear_value[3];
+ }
+ }
+ }
+}
+
+
+/**
+ * Set a tile to a solid value/color.
+ */
+static void
+clear_tile(struct softpipe_cached_tile *tile,
+ enum pipe_format format,
+ uint clear_value)
+{
+ uint i, j;
+
+ switch (pf_get_size(format)) {
+ case 1:
+ memset(tile->data.any, 0, TILE_SIZE * TILE_SIZE);
+ break;
+ case 2:
+ if (clear_value == 0) {
+ memset(tile->data.any, 0, 2 * TILE_SIZE * TILE_SIZE);
+ }
+ else {
+ for (i = 0; i < TILE_SIZE; i++) {
+ for (j = 0; j < TILE_SIZE; j++) {
+ tile->data.depth16[i][j] = (ushort) clear_value;
+ }
+ }
+ }
+ break;
+ case 4:
+ if (clear_value == 0) {
+ memset(tile->data.any, 0, 4 * TILE_SIZE * TILE_SIZE);
+ }
+ else {
+ for (i = 0; i < TILE_SIZE; i++) {
+ for (j = 0; j < TILE_SIZE; j++) {
+ tile->data.color32[i][j] = clear_value;
+ }
+ }
+ }
+ break;
+ default:
+ assert(0);
+ }
+}
+
+
+/**
+ * Actually clear the tiles which were flagged as being in a clear state.
+ */
+static void
+sp_tile_cache_flush_clear(struct pipe_context *pipe,
+ struct softpipe_tile_cache *tc)
+{
+ struct pipe_surface *ps = tc->surface;
+ const uint w = tc->surface->width;
+ const uint h = tc->surface->height;
+ uint x, y;
+ uint numCleared = 0;
+
+ /* clear the scratch tile to the clear value */
+ clear_tile(&tc->tile, ps->format, tc->clear_val);
+
+ /* push the tile to all positions marked as clear */
+ for (y = 0; y < h; y += TILE_SIZE) {
+ for (x = 0; x < w; x += TILE_SIZE) {
+ if (is_clear_flag_set(tc->clear_flags, x, y)) {
+ pipe_put_tile_raw(ps,
+ x, y, TILE_SIZE, TILE_SIZE,
+ tc->tile.data.color32, 0/*STRIDE*/);
+
+ /* do this? */
+ clear_clear_flag(tc->clear_flags, x, y);
+
+ numCleared++;
+ }
+ }
+ }
+#if 0
+ debug_printf("num cleared: %u\n", numCleared);
+#endif
+}
+
+
+/**
+ * Flush the tile cache: write all dirty tiles back to the surface.
+ * any tiles "flagged" as cleared will be "really" cleared.
+ */
+void
+sp_flush_tile_cache(struct softpipe_context *softpipe,
+ struct softpipe_tile_cache *tc)
+{
+ struct pipe_surface *ps = tc->surface;
+ int inuse = 0, pos;
+
+ if (ps) {
+ /* caching a drawing surface */
+ for (pos = 0; pos < NUM_ENTRIES; pos++) {
+ struct softpipe_cached_tile *tile = tc->entries + pos;
+ if (tile->x >= 0) {
+ if (tc->depth_stencil) {
+ pipe_put_tile_raw(ps,
+ tile->x, tile->y, TILE_SIZE, TILE_SIZE,
+ tile->data.depth32, 0/*STRIDE*/);
+ }
+ else {
+ pipe_put_tile_rgba(ps,
+ tile->x, tile->y, TILE_SIZE, TILE_SIZE,
+ (float *) tile->data.color);
+ }
+ tile->x = tile->y = -1; /* mark as empty */
+ inuse++;
+ }
+ }
+
+#if TILE_CLEAR_OPTIMIZATION
+ sp_tile_cache_flush_clear(&softpipe->pipe, tc);
+#endif
+ }
+ else if (tc->texture) {
+ /* caching a texture, mark all entries as empty */
+ for (pos = 0; pos < NUM_ENTRIES; pos++) {
+ tc->entries[pos].x = -1;
+ }
+ tc->tex_face = -1;
+ }
+
+#if 0
+ debug_printf("flushed tiles in use: %d\n", inuse);
+#endif
+}
+
+
+/**
+ * Get a tile from the cache.
+ * \param x, y position of tile, in pixels
+ */
+struct softpipe_cached_tile *
+sp_get_cached_tile(struct softpipe_context *softpipe,
+ struct softpipe_tile_cache *tc, int x, int y)
+{
+ struct pipe_surface *ps = tc->surface;
+
+ /* tile pos in framebuffer: */
+ const int tile_x = x & ~(TILE_SIZE - 1);
+ const int tile_y = y & ~(TILE_SIZE - 1);
+
+ /* cache pos/entry: */
+ const int pos = CACHE_POS(x, y);
+ struct softpipe_cached_tile *tile = tc->entries + pos;
+
+ if (tile_x != tile->x ||
+ tile_y != tile->y) {
+
+ if (tile->x != -1) {
+ /* put dirty tile back in framebuffer */
+ if (tc->depth_stencil) {
+ pipe_put_tile_raw(ps,
+ tile->x, tile->y, TILE_SIZE, TILE_SIZE,
+ tile->data.depth32, 0/*STRIDE*/);
+ }
+ else {
+ pipe_put_tile_rgba(ps,
+ tile->x, tile->y, TILE_SIZE, TILE_SIZE,
+ (float *) tile->data.color);
+ }
+ }
+
+ tile->x = tile_x;
+ tile->y = tile_y;
+
+ if (is_clear_flag_set(tc->clear_flags, x, y)) {
+ /* don't get tile from framebuffer, just clear it */
+ if (tc->depth_stencil) {
+ clear_tile(tile, ps->format, tc->clear_val);
+ }
+ else {
+ clear_tile_rgba(tile, ps->format, tc->clear_color);
+ }
+ clear_clear_flag(tc->clear_flags, x, y);
+ }
+ else {
+ /* get new tile data from surface */
+ if (tc->depth_stencil) {
+ pipe_get_tile_raw(ps,
+ tile->x, tile->y, TILE_SIZE, TILE_SIZE,
+ tile->data.depth32, 0/*STRIDE*/);
+ }
+ else {
+ pipe_get_tile_rgba(ps,
+ tile->x, tile->y, TILE_SIZE, TILE_SIZE,
+ (float *) tile->data.color);
+ }
+ }
+ }
+
+ return tile;
+}
+
+
+/**
+ * Given the texture face, level, zslice, x and y values, compute
+ * the cache entry position/index where we'd hope to find the
+ * cached texture tile.
+ * This is basically a direct-map cache.
+ * XXX There's probably lots of ways in which we can improve this.
+ */
+static INLINE uint
+tex_cache_pos(int x, int y, int z, int face, int level)
+{
+ uint entry = x + y * 5 + z * 4 + face + level;
+ return entry % NUM_ENTRIES;
+}
+
+
+/**
+ * Similar to sp_get_cached_tile() but for textures.
+ * Tiles are read-only and indexed with more params.
+ */
+const struct softpipe_cached_tile *
+sp_get_cached_tile_tex(struct softpipe_context *sp,
+ struct softpipe_tile_cache *tc, int x, int y, int z,
+ int face, int level)
+{
+ struct pipe_screen *screen = sp->pipe.screen;
+ /* tile pos in framebuffer: */
+ const int tile_x = x & ~(TILE_SIZE - 1);
+ const int tile_y = y & ~(TILE_SIZE - 1);
+ /* cache pos/entry: */
+ const uint pos = tex_cache_pos(x / TILE_SIZE, y / TILE_SIZE, z,
+ face, level);
+ struct softpipe_cached_tile *tile = tc->entries + pos;
+
+ if (tc->texture) {
+ struct softpipe_texture *spt = softpipe_texture(tc->texture);
+ if (spt->modified) {
+ /* texture was modified, force a cache reload */
+ tile->x = -1;
+ spt->modified = FALSE;
+ }
+ }
+
+ if (tile_x != tile->x ||
+ tile_y != tile->y ||
+ z != tile->z ||
+ face != tile->face ||
+ level != tile->level) {
+ /* cache miss */
+
+ /* check if we need to get a new surface */
+ if (!tc->tex_surf ||
+ tc->tex_face != face ||
+ tc->tex_level != level ||
+ tc->tex_z != z) {
+ /* get new surface (view into texture) */
+
+ if (tc->tex_surf_map)
+ tc->screen->surface_unmap(tc->screen, tc->tex_surf);
+
+ tc->tex_surf = screen->get_tex_surface(screen, tc->texture, face, level, z,
+ PIPE_BUFFER_USAGE_CPU_READ);
+ tc->tex_surf_map = screen->surface_map(screen, tc->tex_surf,
+ PIPE_BUFFER_USAGE_CPU_READ);
+
+ tc->tex_face = face;
+ tc->tex_level = level;
+ tc->tex_z = z;
+ }
+
+ /* get tile from the surface (view into texture) */
+ pipe_get_tile_rgba(tc->tex_surf,
+ tile_x, tile_y, TILE_SIZE, TILE_SIZE,
+ (float *) tile->data.color);
+ tile->x = tile_x;
+ tile->y = tile_y;
+ tile->z = z;
+ tile->face = face;
+ tile->level = level;
+ }
+
+ return tile;
+}
+
+
+/**
+ * When a whole surface is being cleared to a value we can avoid
+ * fetching tiles above.
+ * Save the color and set a 'clearflag' for each tile of the screen.
+ */
+void
+sp_tile_cache_clear(struct softpipe_tile_cache *tc, uint clearValue)
+{
+ uint r, g, b, a;
+ uint pos;
+
+ tc->clear_val = clearValue;
+
+ switch (tc->surface->format) {
+ case PIPE_FORMAT_R8G8B8A8_UNORM:
+ r = (clearValue >> 24) & 0xff;
+ g = (clearValue >> 16) & 0xff;
+ b = (clearValue >> 8) & 0xff;
+ a = (clearValue ) & 0xff;
+ break;
+ case PIPE_FORMAT_A8R8G8B8_UNORM:
+ r = (clearValue >> 16) & 0xff;
+ g = (clearValue >> 8) & 0xff;
+ b = (clearValue ) & 0xff;
+ a = (clearValue >> 24) & 0xff;
+ break;
+ case PIPE_FORMAT_B8G8R8A8_UNORM:
+ r = (clearValue >> 8) & 0xff;
+ g = (clearValue >> 16) & 0xff;
+ b = (clearValue >> 24) & 0xff;
+ a = (clearValue ) & 0xff;
+ break;
+ default:
+ r = g = b = a = 0;
+ }
+
+ tc->clear_color[0] = r / 255.0f;
+ tc->clear_color[1] = g / 255.0f;
+ tc->clear_color[2] = b / 255.0f;
+ tc->clear_color[3] = a / 255.0f;
+
+#if TILE_CLEAR_OPTIMIZATION
+ /* set flags to indicate all the tiles are cleared */
+ memset(tc->clear_flags, 255, sizeof(tc->clear_flags));
+#else
+ /* disable the optimization */
+ memset(tc->clear_flags, 0, sizeof(tc->clear_flags));
+#endif
+
+ for (pos = 0; pos < NUM_ENTRIES; pos++) {
+ struct softpipe_cached_tile *tile = tc->entries + pos;
+ tile->x = tile->y = -1;
+ }
+}
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