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Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_tile_cache.c')
-rw-r--r--src/gallium/drivers/llvmpipe/lp_tile_cache.c299
1 files changed, 299 insertions, 0 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_tile_cache.c b/src/gallium/drivers/llvmpipe/lp_tile_cache.c
new file mode 100644
index 0000000000..143afec3d3
--- /dev/null
+++ b/src/gallium/drivers/llvmpipe/lp_tile_cache.c
@@ -0,0 +1,299 @@
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+/**
+ * Texture tile caching.
+ *
+ * Author:
+ * Brian Paul
+ */
+
+#include "pipe/p_inlines.h"
+#include "util/u_memory.h"
+#include "util/u_math.h"
+#include "util/u_tile.h"
+#include "util/u_rect.h"
+#include "lp_context.h"
+#include "lp_surface.h"
+#include "lp_texture.h"
+#include "lp_tile_soa.h"
+#include "lp_tile_cache.h"
+
+
+struct llvmpipe_tile_cache *
+lp_create_tile_cache( struct pipe_screen *screen )
+{
+ struct llvmpipe_tile_cache *tc;
+
+ tc = CALLOC_STRUCT( llvmpipe_tile_cache );
+ if(!tc)
+ return NULL;
+
+ tc->screen = screen;
+
+ return tc;
+}
+
+
+void
+lp_destroy_tile_cache(struct llvmpipe_tile_cache *tc)
+{
+ struct pipe_screen *screen;
+ unsigned x, y;
+
+ for (y = 0; y < MAX_HEIGHT; y += TILE_SIZE) {
+ for (x = 0; x < MAX_WIDTH; x += TILE_SIZE) {
+ struct llvmpipe_cached_tile *tile = &tc->entries[y/TILE_SIZE][x/TILE_SIZE];
+
+ if(tile->color)
+ align_free(tile->color);
+ }
+ }
+
+ if (tc->transfer) {
+ screen = tc->transfer->texture->screen;
+ screen->tex_transfer_destroy(tc->transfer);
+ }
+
+ FREE( tc );
+}
+
+
+/**
+ * Specify the surface to cache.
+ */
+void
+lp_tile_cache_set_surface(struct llvmpipe_tile_cache *tc,
+ struct pipe_surface *ps)
+{
+ if (tc->transfer) {
+ struct pipe_screen *screen = tc->transfer->texture->screen;
+
+ if (ps == tc->surface)
+ return;
+
+ if (tc->transfer_map) {
+ screen->transfer_unmap(screen, tc->transfer);
+ tc->transfer_map = NULL;
+ }
+
+ screen->tex_transfer_destroy(tc->transfer);
+ tc->transfer = NULL;
+ }
+
+ tc->surface = ps;
+
+ if (ps) {
+ struct pipe_screen *screen = ps->texture->screen;
+ unsigned x, y;
+
+ tc->transfer = screen->get_tex_transfer(screen, ps->texture, ps->face,
+ ps->level, ps->zslice,
+ PIPE_TRANSFER_READ_WRITE,
+ 0, 0, ps->width, ps->height);
+
+ for (y = 0; y < ps->height; y += TILE_SIZE) {
+ for (x = 0; x < ps->width; x += TILE_SIZE) {
+ struct llvmpipe_cached_tile *tile = &tc->entries[y/TILE_SIZE][x/TILE_SIZE];
+
+ tile->status = LP_TILE_STATUS_UNDEFINED;
+
+ if(!tile->color)
+ tile->color = align_malloc( TILE_SIZE*TILE_SIZE*NUM_CHANNELS, 16 );
+ }
+ }
+ }
+}
+
+
+/**
+ * Return the transfer being cached.
+ */
+struct pipe_surface *
+lp_tile_cache_get_surface(struct llvmpipe_tile_cache *tc)
+{
+ return tc->surface;
+}
+
+
+void
+lp_tile_cache_map_transfers(struct llvmpipe_tile_cache *tc)
+{
+ if (tc->transfer && !tc->transfer_map)
+ tc->transfer_map = tc->screen->transfer_map(tc->screen, tc->transfer);
+}
+
+
+void
+lp_tile_cache_unmap_transfers(struct llvmpipe_tile_cache *tc)
+{
+ if (tc->transfer_map) {
+ tc->screen->transfer_unmap(tc->screen, tc->transfer);
+ tc->transfer_map = NULL;
+ }
+}
+
+
+/**
+ * Set a tile to a solid color.
+ */
+static void
+clear_tile(struct llvmpipe_cached_tile *tile,
+ uint8_t clear_color[4])
+{
+ if (clear_color[0] == clear_color[1] &&
+ clear_color[1] == clear_color[2] &&
+ clear_color[2] == clear_color[3]) {
+ memset(tile->color, clear_color[0], TILE_SIZE * TILE_SIZE * 4);
+ }
+ else {
+ uint x, y, chan;
+ for (y = 0; y < TILE_SIZE; y++)
+ for (x = 0; x < TILE_SIZE; x++)
+ for (chan = 0; chan < 4; ++chan)
+ TILE_PIXEL(tile->color, x, y, chan) = clear_color[chan];
+ }
+}
+
+
+/**
+ * Flush the tile cache: write all dirty tiles back to the transfer.
+ * any tiles "flagged" as cleared will be "really" cleared.
+ */
+void
+lp_flush_tile_cache(struct llvmpipe_tile_cache *tc)
+{
+ struct pipe_transfer *pt = tc->transfer;
+ unsigned x, y;
+
+ if(!pt)
+ return;
+
+ /* push the tile to all positions marked as clear */
+ for (y = 0; y < pt->height; y += TILE_SIZE) {
+ for (x = 0; x < pt->width; x += TILE_SIZE) {
+ struct llvmpipe_cached_tile *tile = &tc->entries[y/TILE_SIZE][x/TILE_SIZE];
+
+ switch(tile->status) {
+ case LP_TILE_STATUS_UNDEFINED:
+ break;
+
+ case LP_TILE_STATUS_CLEAR: {
+ /**
+ * Actually clear the tiles which were flagged as being in a clear state.
+ */
+
+ struct pipe_screen *screen = pt->texture->screen;
+ unsigned tw = TILE_SIZE;
+ unsigned th = TILE_SIZE;
+ void *dst;
+
+ if (pipe_clip_tile(x, y, &tw, &th, pt))
+ continue;
+
+ dst = screen->transfer_map(screen, pt);
+ assert(dst);
+ if(!dst)
+ continue;
+
+ util_fill_rect(dst, &pt->block, pt->stride,
+ x, y, tw, th,
+ tc->clear_val);
+
+ screen->transfer_unmap(screen, pt);
+ break;
+ }
+
+ case LP_TILE_STATUS_DEFINED:
+ lp_put_tile_rgba_soa(pt, x, y, tile->color);
+ break;
+ }
+ }
+ }
+}
+
+
+/**
+ * Get a tile from the cache.
+ * \param x, y position of tile, in pixels
+ */
+void *
+lp_get_cached_tile(struct llvmpipe_tile_cache *tc,
+ unsigned x, unsigned y )
+{
+ struct llvmpipe_cached_tile *tile = &tc->entries[y/TILE_SIZE][x/TILE_SIZE];
+ struct pipe_transfer *pt = tc->transfer;
+
+ switch(tile->status) {
+ case LP_TILE_STATUS_CLEAR:
+ /* don't get tile from framebuffer, just clear it */
+ clear_tile(tile, tc->clear_color);
+ tile->status = LP_TILE_STATUS_DEFINED;
+ break;
+
+ case LP_TILE_STATUS_UNDEFINED:
+ /* get new tile data from transfer */
+ lp_get_tile_rgba_soa(pt, x, y, tile->color);
+ tile->status = LP_TILE_STATUS_DEFINED;
+ break;
+
+ case LP_TILE_STATUS_DEFINED:
+ /* nothing to do */
+ break;
+ }
+
+ return tile->color;
+}
+
+
+/**
+ * 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
+lp_tile_cache_clear(struct llvmpipe_tile_cache *tc, const float *rgba,
+ uint clearValue)
+{
+ struct pipe_transfer *pt = tc->transfer;
+ const unsigned w = pt->width;
+ const unsigned h = pt->height;
+ unsigned x, y, chan;
+
+ for(chan = 0; chan < 4; ++chan)
+ tc->clear_color[chan] = float_to_ubyte(rgba[chan]);
+
+ tc->clear_val = clearValue;
+
+ /* 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) {
+ struct llvmpipe_cached_tile *tile = &tc->entries[y/TILE_SIZE][x/TILE_SIZE];
+ tile->status = LP_TILE_STATUS_CLEAR;
+ }
+ }
+}
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