SOURCES = \
- main.c \
- tile.c \
- tri.c
+ spu_main.c \
+ spu_tile.c \
+ spu_tri.c
SPU_OBJECTS = $(SOURCES:.c=.o) \
INCLUDE_DIRS = -I$(TOP)/src/mesa
+.c.o:
+ $(SPU_CC) $(SPU_CFLAGS) -c $<
+
+
# The .a file will be linked into the main/PPU executable
default: $(PROG_SPU_A)
$(SPU_CC) -o $(PROG_SPU) $(SPU_OBJECTS) $(SPU_LFLAGS)
-main.o: main.c
- $(SPU_CC) $(SPU_CFLAGS) -c main.c
-
-tile.o: tile.c
- $(SPU_CC) $(SPU_CFLAGS) -c tile.c
-
-tri.o: tri.c
- $(SPU_CC) $(SPU_CFLAGS) -c tri.c
-
clean:
rm -f *~ *.o *.a *.d $(PROG_SPU)
--- /dev/null
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+
+/* main() for Cell SPU code */
+
+
+#include <stdio.h>
+#include <libmisc.h>
+#include <spu_mfcio.h>
+
+#include "spu_main.h"
+#include "spu_tri.h"
+#include "spu_tile.h"
+#include "pipe/cell/common.h"
+#include "pipe/p_defines.h"
+
+/*
+helpful headers:
+/usr/lib/gcc/spu/4.1.1/include/spu_mfcio.h
+/opt/ibm/cell-sdk/prototype/sysroot/usr/include/libmisc.h
+*/
+
+static boolean Debug = FALSE;
+
+volatile struct cell_init_info init;
+
+struct framebuffer fb;
+
+
+
+void
+wait_on_mask(unsigned tagMask)
+{
+ mfc_write_tag_mask( tagMask );
+ /* wait for completion of _any_ DMAs specified by tagMask */
+ mfc_read_tag_status_any();
+}
+
+
+static void
+wait_on_mask_all(unsigned tagMask)
+{
+ mfc_write_tag_mask( tagMask );
+ /* wait for completion of _any_ DMAs specified by tagMask */
+ mfc_read_tag_status_all();
+}
+
+
+
+/**
+ * For tiles whose status is TILE_STATUS_CLEAR, write solid-filled
+ * tiles back to the main framebuffer.
+ */
+static void
+really_clear_tiles(uint surfaceIndex)
+{
+ const uint num_tiles = fb.width_tiles * fb.height_tiles;
+ uint i, j;
+
+ if (surfaceIndex == 0) {
+ for (i = 0; i < TILE_SIZE; i++)
+ for (j = 0; j < TILE_SIZE; j++)
+ ctile[i][j] = fb.color_clear_value;
+
+ for (i = init.id; i < num_tiles; i += init.num_spus) {
+ uint tx = i % fb.width_tiles;
+ uint ty = i / fb.width_tiles;
+ if (tile_status[ty][tx] == TILE_STATUS_CLEAR) {
+ put_tile(&fb, tx, ty, (uint *) ctile, TAG_SURFACE_CLEAR, 0);
+ }
+ }
+ }
+ else {
+ for (i = 0; i < TILE_SIZE; i++)
+ for (j = 0; j < TILE_SIZE; j++)
+ ztile[i][j] = fb.depth_clear_value;
+
+ for (i = init.id; i < num_tiles; i += init.num_spus) {
+ uint tx = i % fb.width_tiles;
+ uint ty = i / fb.width_tiles;
+ if (tile_status_z[ty][tx] == TILE_STATUS_CLEAR)
+ put_tile(&fb, tx, ty, (uint *) ctile, TAG_SURFACE_CLEAR, 1);
+ }
+ }
+
+#if 0
+ wait_on_mask(1 << TAG_SURFACE_CLEAR);
+#endif
+}
+
+
+static void
+cmd_clear_surface(const struct cell_command_clear_surface *clear)
+{
+ const uint num_tiles = fb.width_tiles * fb.height_tiles;
+ uint i, j;
+
+ if (Debug)
+ printf("SPU %u: CLEAR SURF %u to 0x%08x\n", init.id,
+ clear->surface, clear->value);
+
+#define CLEAR_OPT 1
+#if CLEAR_OPT
+ /* set all tile's status to CLEAR */
+ if (clear->surface == 0) {
+ memset(tile_status, TILE_STATUS_CLEAR, sizeof(tile_status));
+ fb.color_clear_value = clear->value;
+ }
+ else {
+ memset(tile_status_z, TILE_STATUS_CLEAR, sizeof(tile_status_z));
+ fb.depth_clear_value = clear->value;
+ }
+ return;
+#endif
+
+ if (clear->surface == 0) {
+ for (i = 0; i < TILE_SIZE; i++)
+ for (j = 0; j < TILE_SIZE; j++)
+ ctile[i][j] = clear->value;
+ }
+ else {
+ for (i = 0; i < TILE_SIZE; i++)
+ for (j = 0; j < TILE_SIZE; j++)
+ ztile[i][j] = clear->value;
+ }
+
+ /*
+ printf("SPU: %s num=%d w=%d h=%d\n",
+ __FUNCTION__, num_tiles, fb.width_tiles, fb.height_tiles);
+ */
+
+ for (i = init.id; i < num_tiles; i += init.num_spus) {
+ uint tx = i % fb.width_tiles;
+ uint ty = i / fb.width_tiles;
+ if (clear->surface == 0)
+ put_tile(&fb, tx, ty, (uint *) ctile, TAG_SURFACE_CLEAR, 0);
+ else
+ put_tile(&fb, tx, ty, (uint *) ztile, TAG_SURFACE_CLEAR, 1);
+ /* XXX we don't want this here, but it fixes bad tile results */
+ }
+
+#if 0
+ wait_on_mask(1 << TAG_SURFACE_CLEAR);
+#endif
+}
+
+
+/**
+ * Given a rendering command's bounding box (in pixels) compute the
+ * location of the corresponding screen tile bounding box.
+ */
+static INLINE void
+tile_bounding_box(const struct cell_command_render *render,
+ uint *txmin, uint *tymin,
+ uint *box_num_tiles, uint *box_width_tiles)
+{
+#if 1
+ /* Debug: full-window bounding box */
+ uint txmax = fb.width_tiles - 1;
+ uint tymax = fb.height_tiles - 1;
+ *txmin = 0;
+ *tymin = 0;
+ *box_num_tiles = fb.width_tiles * fb.height_tiles;
+ *box_width_tiles = fb.width_tiles;
+ (void) render;
+ (void) txmax;
+ (void) tymax;
+#else
+ uint txmax, tymax, box_height_tiles;
+
+ *txmin = (uint) render->xmin / TILE_SIZE;
+ *tymin = (uint) render->ymin / TILE_SIZE;
+ txmax = (uint) render->xmax / TILE_SIZE;
+ tymax = (uint) render->ymax / TILE_SIZE;
+ *box_width_tiles = txmax - *txmin + 1;
+ box_height_tiles = tymax - *tymin + 1;
+ *box_num_tiles = *box_width_tiles * box_height_tiles;
+#endif
+#if 0
+ printf("Render bounds: %g, %g ... %g, %g\n",
+ render->xmin, render->ymin, render->xmax, render->ymax);
+ printf("Render tiles: %u, %u .. %u, %u\n", *txmin, *tymin, txmax, tymax);
+#endif
+}
+
+
+static void
+cmd_render(const struct cell_command_render *render)
+{
+ /* we'll DMA into these buffers */
+ ubyte vertex_data[CELL_MAX_VBUF_SIZE] ALIGN16_ATTRIB;
+ ushort indexes[CELL_MAX_VBUF_INDEXES] ALIGN16_ATTRIB;
+
+ uint i, j, vertex_size, vertex_bytes, index_bytes;
+
+ if (Debug)
+ printf("SPU %u: RENDER prim %u, indices: %u, nr_vert: %u\n",
+ init.id,
+ render->prim_type,
+ render->num_verts,
+ render->num_indexes);
+
+
+ ASSERT_ALIGN16(render->vertex_data);
+ ASSERT_ALIGN16(render->index_data);
+
+ vertex_size = render->num_attribs * 4 * sizeof(float);
+
+ /* how much vertex data */
+ vertex_bytes = render->num_verts * vertex_size;
+ index_bytes = render->num_indexes * sizeof(ushort);
+ if (index_bytes < 8)
+ index_bytes = 8;
+ else
+ index_bytes = (index_bytes + 15) & ~0xf; /* multiple of 16 */
+
+ /*
+ printf("VBUF: indices at %p, vertices at %p vertex_bytes %u ind_bytes %u\n",
+ render->index_data, render->vertex_data, vertex_bytes, index_bytes);
+ */
+
+ /* get vertex data from main memory */
+ mfc_get(vertex_data, /* dest */
+ (unsigned int) render->vertex_data, /* src */
+ vertex_bytes, /* size */
+ TAG_VERTEX_BUFFER,
+ 0, /* tid */
+ 0 /* rid */);
+
+ /* get index data from main memory */
+ mfc_get(indexes, /* dest */
+ (unsigned int) render->index_data, /* src */
+ index_bytes,
+ TAG_INDEX_BUFFER,
+ 0, /* tid */
+ 0 /* rid */);
+
+ wait_on_mask_all((1 << TAG_VERTEX_BUFFER) |
+ (1 << TAG_INDEX_BUFFER));
+
+ /* find tiles which intersect the prim bounding box */
+ uint txmin, tymin, box_width_tiles, box_num_tiles;
+#if 0
+ tile_bounding_box(render, &txmin, &tymin,
+ &box_num_tiles, &box_width_tiles);
+#else
+ txmin = 0;
+ tymin = 0;
+ box_num_tiles = fb.width_tiles * fb.height_tiles;
+ box_width_tiles = fb.width_tiles;
+#endif
+
+ /* make sure any pending clears have completed */
+ wait_on_mask(1 << TAG_SURFACE_CLEAR);
+
+ /* loop over tiles */
+ for (i = init.id; i < box_num_tiles; i += init.num_spus) {
+ const uint tx = txmin + i % box_width_tiles;
+ const uint ty = tymin + i / box_width_tiles;
+
+ ASSERT(tx < fb.width_tiles);
+ ASSERT(ty < fb.height_tiles);
+
+ /* Start fetching color/z tiles. We'll wait for completion when
+ * we need read/write to them later in triangle rasterization.
+ */
+ if (fb.depth_format == PIPE_FORMAT_Z16_UNORM) {
+ if (tile_status_z[ty][tx] != TILE_STATUS_CLEAR) {
+ get_tile(&fb, tx, ty, (uint *) ztile, TAG_READ_TILE_Z, 1);
+ }
+ }
+
+ if (tile_status[ty][tx] != TILE_STATUS_CLEAR) {
+ get_tile(&fb, tx, ty, (uint *) ctile, TAG_READ_TILE_COLOR, 0);
+ }
+
+ ASSERT(render->prim_type == PIPE_PRIM_TRIANGLES);
+
+ /* loop over tris */
+ for (j = 0; j < render->num_indexes; j += 3) {
+ const float *v0, *v1, *v2;
+
+ v0 = (const float *) (vertex_data + indexes[j+0] * vertex_size);
+ v1 = (const float *) (vertex_data + indexes[j+1] * vertex_size);
+ v2 = (const float *) (vertex_data + indexes[j+2] * vertex_size);
+
+ tri_draw(v0, v1, v2, tx, ty);
+ }
+
+ /* write color/z tiles back to main framebuffer, if dirtied */
+ if (tile_status[ty][tx] == TILE_STATUS_DIRTY) {
+ put_tile(&fb, tx, ty, (uint *) ctile, TAG_WRITE_TILE_COLOR, 0);
+ tile_status[ty][tx] = TILE_STATUS_DEFINED;
+ }
+ if (fb.depth_format == PIPE_FORMAT_Z16_UNORM) {
+ if (tile_status_z[ty][tx] == TILE_STATUS_DIRTY) {
+ put_tile(&fb, tx, ty, (uint *) ztile, TAG_WRITE_TILE_Z, 1);
+ tile_status_z[ty][tx] = TILE_STATUS_DEFINED;
+ }
+ }
+
+ /* XXX move these... */
+ wait_on_mask(1 << TAG_WRITE_TILE_COLOR);
+ if (fb.depth_format == PIPE_FORMAT_Z16_UNORM) {
+ wait_on_mask(1 << TAG_WRITE_TILE_Z);
+ }
+ }
+}
+
+
+static void
+cmd_framebuffer(const struct cell_command_framebuffer *cmd)
+{
+ if (Debug)
+ printf("SPU %u: FRAMEBUFFER: %d x %d at %p, cformat 0x%x zformat 0x%x\n",
+ init.id,
+ cmd->width,
+ cmd->height,
+ cmd->color_start,
+ cmd->color_format,
+ cmd->depth_format);
+
+ fb.color_start = cmd->color_start;
+ fb.depth_start = cmd->depth_start;
+ fb.color_format = cmd->color_format;
+ fb.depth_format = cmd->depth_format;
+ fb.width = cmd->width;
+ fb.height = cmd->height;
+ fb.width_tiles = (fb.width + TILE_SIZE - 1) / TILE_SIZE;
+ fb.height_tiles = (fb.height + TILE_SIZE - 1) / TILE_SIZE;
+}
+
+
+static void
+cmd_finish(void)
+{
+ if (Debug)
+ printf("SPU %u: FINISH\n", init.id);
+ really_clear_tiles(0);
+ /* wait for all outstanding DMAs to finish */
+ mfc_write_tag_mask(~0);
+ mfc_read_tag_status_all();
+ /* send mbox message to PPU */
+ spu_write_out_mbox(CELL_CMD_FINISH);
+}
+
+
+/**
+ * Execute a batch of commands
+ * The opcode param encodes the location of the buffer and its size.
+ */
+static void
+cmd_batch(uint opcode)
+{
+ const uint buf = (opcode >> 8) & 0xff;
+ uint size = (opcode >> 16);
+ uint buffer[CELL_BATCH_BUFFER_SIZE / 4] ALIGN16_ATTRIB;
+ const uint usize = size / sizeof(uint);
+ uint pos;
+
+ if (Debug)
+ printf("SPU %u: BATCH buffer %u, len %u, from %p\n",
+ init.id, buf, size, init.batch_buffers[buf]);
+
+ ASSERT((opcode & CELL_CMD_OPCODE_MASK) == CELL_CMD_BATCH);
+
+ ASSERT_ALIGN16(init.batch_buffers[buf]);
+
+ size = (size + 0xf) & ~0xf;
+
+ mfc_get(buffer, /* dest */
+ (unsigned int) init.batch_buffers[buf], /* src */
+ size,
+ TAG_BATCH_BUFFER,
+ 0, /* tid */
+ 0 /* rid */);
+ wait_on_mask(1 << TAG_BATCH_BUFFER);
+
+ for (pos = 0; pos < usize; /* no incr */) {
+ switch (buffer[pos]) {
+ case CELL_CMD_FRAMEBUFFER:
+ {
+ struct cell_command_framebuffer *fb
+ = (struct cell_command_framebuffer *) &buffer[pos];
+ cmd_framebuffer(fb);
+ pos += sizeof(*fb) / 4;
+ }
+ break;
+ case CELL_CMD_CLEAR_SURFACE:
+ {
+ struct cell_command_clear_surface *clr
+ = (struct cell_command_clear_surface *) &buffer[pos];
+ cmd_clear_surface(clr);
+ pos += sizeof(*clr) / 4;
+ }
+ break;
+ case CELL_CMD_RENDER:
+ {
+ struct cell_command_render *render
+ = (struct cell_command_render *) &buffer[pos];
+ cmd_render(render);
+ pos += sizeof(*render) / 4;
+ }
+ break;
+ case CELL_CMD_FINISH:
+ cmd_finish();
+ pos += 1;
+ break;
+ default:
+ printf("SPU %u: bad opcode: 0x%x\n", init.id, buffer[pos]);
+ ASSERT(0);
+ break;
+ }
+ }
+
+ if (Debug)
+ printf("SPU %u: BATCH complete\n", init.id);
+}
+
+
+/**
+ * Temporary/simple main loop for SPEs: Get a command, execute it, repeat.
+ */
+static void
+main_loop(void)
+{
+ struct cell_command cmd;
+ int exitFlag = 0;
+
+ if (Debug)
+ printf("SPU %u: Enter main loop\n", init.id);
+
+ ASSERT((sizeof(struct cell_command) & 0xf) == 0);
+ ASSERT_ALIGN16(&cmd);
+
+ while (!exitFlag) {
+ unsigned opcode;
+ int tag = 0;
+
+ if (Debug)
+ printf("SPU %u: Wait for cmd...\n", init.id);
+
+ /* read/wait from mailbox */
+ opcode = (unsigned int) spu_read_in_mbox();
+
+ if (Debug)
+ printf("SPU %u: got cmd 0x%x\n", init.id, opcode);
+
+ /* command payload */
+ mfc_get(&cmd, /* dest */
+ (unsigned int) init.cmd, /* src */
+ sizeof(struct cell_command), /* bytes */
+ tag,
+ 0, /* tid */
+ 0 /* rid */);
+ wait_on_mask( 1 << tag );
+
+ switch (opcode & CELL_CMD_OPCODE_MASK) {
+ case CELL_CMD_EXIT:
+ if (Debug)
+ printf("SPU %u: EXIT\n", init.id);
+ exitFlag = 1;
+ break;
+ case CELL_CMD_FRAMEBUFFER:
+ cmd_framebuffer(&cmd.fb);
+ break;
+ case CELL_CMD_CLEAR_SURFACE:
+ cmd_clear_surface(&cmd.clear);
+ break;
+ case CELL_CMD_RENDER:
+ cmd_render(&cmd.render);
+ break;
+ case CELL_CMD_BATCH:
+ cmd_batch(opcode);
+ break;
+ case CELL_CMD_FINISH:
+ cmd_finish();
+ break;
+ default:
+ printf("Bad opcode!\n");
+ }
+
+ }
+
+ if (Debug)
+ printf("SPU %u: Exit main loop\n", init.id);
+}
+
+
+
+static void
+one_time_init(void)
+{
+ memset(tile_status, TILE_STATUS_DEFINED, sizeof(tile_status));
+ memset(tile_status_z, TILE_STATUS_DEFINED, sizeof(tile_status_z));
+}
+
+
+/**
+ * SPE entrypoint.
+ * Note: example programs declare params as 'unsigned long long' but
+ * that doesn't work.
+ */
+int
+main(unsigned long speid, unsigned long argp)
+{
+ int tag = 0;
+
+ (void) speid;
+
+ one_time_init();
+
+ if (Debug)
+ printf("SPU: main() speid=%lu\n", speid);
+
+ mfc_get(&init, /* dest */
+ (unsigned int) argp, /* src */
+ sizeof(struct cell_init_info), /* bytes */
+ tag,
+ 0, /* tid */
+ 0 /* rid */);
+ wait_on_mask( 1 << tag );
+
+
+ main_loop();
+
+ return 0;
+}
--- /dev/null
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+#ifndef SPU_MAIN_H
+#define SPU_MAIN_H
+
+
+#include "pipe/cell/common.h"
+
+
+extern volatile struct cell_init_info init;
+
+struct framebuffer {
+ void *color_start; /**< addr of color surface in main memory */
+ void *depth_start; /**< addr of depth surface in main memory */
+ enum pipe_format color_format;
+ enum pipe_format depth_format;
+ uint width, height; /**< size in pixels */
+ uint width_tiles, height_tiles; /**< width and height in tiles */
+
+ uint color_clear_value;
+ uint depth_clear_value;
+};
+
+/* XXX Collect these globals in a struct: */
+
+extern struct framebuffer fb;
+
+
+/* DMA TAGS */
+
+#define TAG_SURFACE_CLEAR 10
+#define TAG_VERTEX_BUFFER 11
+#define TAG_READ_TILE_COLOR 12
+#define TAG_READ_TILE_Z 13
+#define TAG_WRITE_TILE_COLOR 14
+#define TAG_WRITE_TILE_Z 15
+#define TAG_INDEX_BUFFER 16
+#define TAG_BATCH_BUFFER 17
+
+/** The standard assert macro doesn't seem to work on SPUs */
+#define ASSERT(x) \
+ if (!(x)) { \
+ fprintf(stderr, "SPU %d: %s:%d: %s(): assertion %s failed.\n", \
+ init.id, __FILE__, __LINE__, __FUNCTION__, #x); \
+ exit(1); \
+ }
+
+
+void
+wait_on_mask(unsigned tag);
+
+
+#endif /* SPU_MAIN_H */
--- /dev/null
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+
+
+#include "spu_tile.h"
+
+
+
+uint ctile[TILE_SIZE][TILE_SIZE] ALIGN16_ATTRIB;
+ushort ztile[TILE_SIZE][TILE_SIZE] ALIGN16_ATTRIB;
+
+ubyte tile_status[MAX_HEIGHT/TILE_SIZE][MAX_WIDTH/TILE_SIZE] ALIGN16_ATTRIB;
+ubyte tile_status_z[MAX_HEIGHT/TILE_SIZE][MAX_WIDTH/TILE_SIZE] ALIGN16_ATTRIB;
+
+
+
+void
+get_tile(const struct framebuffer *fb, uint tx, uint ty, uint *tile,
+ int tag, int zBuf)
+{
+ const uint offset = ty * fb->width_tiles + tx;
+ const uint bytesPerTile = TILE_SIZE * TILE_SIZE * (zBuf ? 2 : 4);
+ const ubyte *src = zBuf ? fb->depth_start : fb->color_start;
+
+ src += offset * bytesPerTile;
+
+ ASSERT(tx < fb->width_tiles);
+ ASSERT(ty < fb->height_tiles);
+ ASSERT_ALIGN16(tile);
+ /*
+ printf("get_tile: dest: %p src: 0x%x size: %d\n",
+ tile, (unsigned int) src, bytesPerTile);
+ */
+ mfc_get(tile, /* dest in local memory */
+ (unsigned int) src, /* src in main memory */
+ bytesPerTile,
+ tag,
+ 0, /* tid */
+ 0 /* rid */);
+}
+
+
+void
+put_tile(const struct framebuffer *fb, uint tx, uint ty, const uint *tile,
+ int tag, int zBuf)
+{
+ const uint offset = ty * fb->width_tiles + tx;
+ const uint bytesPerTile = TILE_SIZE * TILE_SIZE * (zBuf ? 2 : 4);
+ ubyte *dst = zBuf ? fb->depth_start : fb->color_start;
+
+ dst += offset * bytesPerTile;
+
+ ASSERT(tx < fb->width_tiles);
+ ASSERT(ty < fb->height_tiles);
+ ASSERT_ALIGN16(tile);
+ /*
+ printf("put_tile: src: %p dst: 0x%x size: %d\n",
+ tile, (unsigned int) dst, bytesPerTile);
+ */
+ mfc_put((void *) tile, /* src in local memory */
+ (unsigned int) dst, /* dst in main memory */
+ bytesPerTile,
+ tag,
+ 0, /* tid */
+ 0 /* rid */);
+}
+
+
+void
+clear_tile(uint tile[TILE_SIZE][TILE_SIZE], uint value)
+{
+ uint i, j;
+ for (i = 0; i < TILE_SIZE; i++) {
+ for (j = 0; j < TILE_SIZE; j++) {
+ tile[i][j] = value;
+ }
+ }
+}
+
+void
+clear_tile_z(ushort tile[TILE_SIZE][TILE_SIZE], uint value)
+{
+ uint i, j;
+ for (i = 0; i < TILE_SIZE; i++) {
+ for (j = 0; j < TILE_SIZE; j++) {
+ tile[i][j] = value;
+ }
+ }
+}
+
--- /dev/null
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+#ifndef SPU_TILE_H
+#define SPU_TILE_H
+
+
+#include <libmisc.h>
+#include <spu_mfcio.h>
+#include "spu_main.h"
+#include "pipe/cell/common.h"
+
+
+#define MAX_WIDTH 1024
+#define MAX_HEIGHT 1024
+
+
+extern uint ctile[TILE_SIZE][TILE_SIZE] ALIGN16_ATTRIB;
+extern ushort ztile[TILE_SIZE][TILE_SIZE] ALIGN16_ATTRIB;
+
+
+#define TILE_STATUS_CLEAR 1
+#define TILE_STATUS_DEFINED 2 /**< defined pixel data */
+#define TILE_STATUS_DIRTY 3 /**< modified, but not put back yet */
+
+extern ubyte tile_status[MAX_HEIGHT/TILE_SIZE][MAX_WIDTH/TILE_SIZE] ALIGN16_ATTRIB;
+extern ubyte tile_status_z[MAX_HEIGHT/TILE_SIZE][MAX_WIDTH/TILE_SIZE] ALIGN16_ATTRIB;
+
+
+void
+get_tile(const struct framebuffer *fb, uint tx, uint ty, uint *tile,
+ int tag, int zBuf);
+
+void
+put_tile(const struct framebuffer *fb, uint tx, uint ty, const uint *tile,
+ int tag, int zBuf);
+
+void
+clear_tile(uint tile[TILE_SIZE][TILE_SIZE], uint value);
+
+void
+clear_tile_z(ushort tile[TILE_SIZE][TILE_SIZE], uint value);
+
+
+#endif /* SPU_TILE_H */
--- /dev/null
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+/**
+ * Triangle rendering within a tile.
+ */
+
+#include "pipe/p_compiler.h"
+#include "pipe/p_format.h"
+#include "pipe/p_util.h"
+#include "spu_main.h"
+#include "spu_tile.h"
+#include "spu_tri.h"
+
+
+
+/**
+ * Simplified types taken from other parts of Gallium
+ */
+
+struct vertex_header {
+ float data[2][4]; /* pos and color */
+};
+
+struct prim_header {
+ struct vertex_header *v[3];
+};
+
+
+
+
+#if 1
+
+/* XXX fix this */
+#undef CEILF
+#define CEILF(X) ((float) (int) ((X) + 0.99999))
+
+
+#define QUAD_TOP_LEFT 0
+#define QUAD_TOP_RIGHT 1
+#define QUAD_BOTTOM_LEFT 2
+#define QUAD_BOTTOM_RIGHT 3
+#define MASK_TOP_LEFT (1 << QUAD_TOP_LEFT)
+#define MASK_TOP_RIGHT (1 << QUAD_TOP_RIGHT)
+#define MASK_BOTTOM_LEFT (1 << QUAD_BOTTOM_LEFT)
+#define MASK_BOTTOM_RIGHT (1 << QUAD_BOTTOM_RIGHT)
+#define MASK_ALL 0xf
+
+#define PIPE_MAX_SHADER_INPUTS 8 /* XXX temp */
+
+#endif
+
+
+#define DEBUG_VERTS 0
+
+/**
+ * Triangle edge info
+ */
+struct edge {
+ float dx; /**< X(v1) - X(v0), used only during setup */
+ float dy; /**< Y(v1) - Y(v0), used only during setup */
+ float dxdy; /**< dx/dy */
+ float sx, sy; /**< first sample point coord */
+ int lines; /**< number of lines on this edge */
+};
+
+
+struct interp_coef
+{
+ float a0[4];
+ float dadx[4];
+ float dady[4];
+};
+
+/**
+ * Triangle setup info (derived from draw_stage).
+ * Also used for line drawing (taking some liberties).
+ */
+struct setup_stage {
+
+ /* Vertices are just an array of floats making up each attribute in
+ * turn. Currently fixed at 4 floats, but should change in time.
+ * Codegen will help cope with this.
+ */
+ const struct vertex_header *vmax;
+ const struct vertex_header *vmid;
+ const struct vertex_header *vmin;
+ const struct vertex_header *vprovoke;
+
+ struct edge ebot;
+ struct edge etop;
+ struct edge emaj;
+
+ float oneoverarea;
+
+ uint tx, ty;
+
+ int cliprect_minx, cliprect_maxx, cliprect_miny, cliprect_maxy;
+
+#if 0
+ struct tgsi_interp_coef coef[PIPE_MAX_SHADER_INPUTS];
+#else
+ struct interp_coef coef[PIPE_MAX_SHADER_INPUTS];
+#endif
+
+#if 0
+ struct quad_header quad;
+#endif
+
+ struct {
+ int left[2]; /**< [0] = row0, [1] = row1 */
+ int right[2];
+ int y;
+ unsigned y_flags;
+ unsigned mask; /**< mask of MASK_BOTTOM/TOP_LEFT/RIGHT bits */
+ } span;
+};
+
+
+#if 0
+/**
+ * Basically a cast wrapper.
+ */
+static INLINE struct setup_stage *setup_stage( struct draw_stage *stage )
+{
+ return (struct setup_stage *)stage;
+}
+#endif
+
+#if 0
+/**
+ * Clip setup->quad against the scissor/surface bounds.
+ */
+static INLINE void
+quad_clip(struct setup_stage *setup)
+{
+ const struct pipe_scissor_state *cliprect = &setup->softpipe->cliprect;
+ const int minx = (int) cliprect->minx;
+ const int maxx = (int) cliprect->maxx;
+ const int miny = (int) cliprect->miny;
+ const int maxy = (int) cliprect->maxy;
+
+ if (setup->quad.x0 >= maxx ||
+ setup->quad.y0 >= maxy ||
+ setup->quad.x0 + 1 < minx ||
+ setup->quad.y0 + 1 < miny) {
+ /* totally clipped */
+ setup->quad.mask = 0x0;
+ return;
+ }
+ if (setup->quad.x0 < minx)
+ setup->quad.mask &= (MASK_BOTTOM_RIGHT | MASK_TOP_RIGHT);
+ if (setup->quad.y0 < miny)
+ setup->quad.mask &= (MASK_BOTTOM_LEFT | MASK_BOTTOM_RIGHT);
+ if (setup->quad.x0 == maxx - 1)
+ setup->quad.mask &= (MASK_BOTTOM_LEFT | MASK_TOP_LEFT);
+ if (setup->quad.y0 == maxy - 1)
+ setup->quad.mask &= (MASK_TOP_LEFT | MASK_TOP_RIGHT);
+}
+#endif
+
+#if 0
+/**
+ * Emit a quad (pass to next stage) with clipping.
+ */
+static INLINE void
+clip_emit_quad(struct setup_stage *setup)
+{
+ quad_clip(setup);
+ if (setup->quad.mask) {
+ struct softpipe_context *sp = setup->softpipe;
+ sp->quad.first->run(sp->quad.first, &setup->quad);
+ }
+}
+#endif
+
+/**
+ * Evaluate attribute coefficients (plane equations) to compute
+ * attribute values for the four fragments in a quad.
+ * Eg: four colors will be compute.
+ */
+static INLINE void
+eval_coeff( struct setup_stage *setup, uint slot,
+ float x, float y, float result[4][4])
+{
+ uint i;
+ const float *dadx = setup->coef[slot].dadx;
+ const float *dady = setup->coef[slot].dady;
+
+ /* loop over XYZW comps */
+ for (i = 0; i < 4; i++) {
+ result[QUAD_TOP_LEFT][i] = setup->coef[slot].a0[i] + x * dadx[i] + y * dady[i];
+ result[QUAD_TOP_RIGHT][i] = result[0][i] + dadx[i];
+ result[QUAD_BOTTOM_LEFT][i] = result[0][i] + dady[i];
+ result[QUAD_BOTTOM_RIGHT][i] = result[0][i] + dadx[i] + dady[i];
+ }
+}
+
+
+static INLINE void
+eval_z( struct setup_stage *setup,
+ float x, float y, float result[4])
+{
+ uint slot = 0;
+ uint i = 2;
+ const float *dadx = setup->coef[slot].dadx;
+ const float *dady = setup->coef[slot].dady;
+
+ result[QUAD_TOP_LEFT] = setup->coef[slot].a0[i] + x * dadx[i] + y * dady[i];
+ result[QUAD_TOP_RIGHT] = result[0] + dadx[i];
+ result[QUAD_BOTTOM_LEFT] = result[0] + dady[i];
+ result[QUAD_BOTTOM_RIGHT] = result[0] + dadx[i] + dady[i];
+}
+
+
+static INLINE uint
+pack_color(const float color[4])
+{
+ uint r = (uint) (color[0] * 255.0);
+ uint g = (uint) (color[1] * 255.0);
+ uint b = (uint) (color[2] * 255.0);
+ uint a = (uint) (color[3] * 255.0);
+ switch (fb.color_format) {
+ case PIPE_FORMAT_A8R8G8B8_UNORM:
+ return (a << 24) | (r << 16) | (g << 8) | b;
+ case PIPE_FORMAT_B8G8R8A8_UNORM:
+ return (b << 24) | (g << 16) | (r << 8) | a;
+ default:
+ ASSERT(0);
+ return 0;
+ }
+}
+
+
+/**
+ * Emit a quad (pass to next stage). No clipping is done.
+ */
+static INLINE void
+emit_quad( struct setup_stage *setup, int x, int y, unsigned mask )
+{
+#if 0
+ struct softpipe_context *sp = setup->softpipe;
+ setup->quad.x0 = x;
+ setup->quad.y0 = y;
+ setup->quad.mask = mask;
+ sp->quad.first->run(sp->quad.first, &setup->quad);
+#else
+ /* Cell: "write" quad fragments to the tile by setting prim color */
+ int ix = x - setup->cliprect_minx;
+ int iy = y - setup->cliprect_miny;
+ float colors[4][4];
+ uint z;
+
+ eval_coeff(setup, 1, (float) x, (float) y, colors);
+
+ if (fb.depth_format == PIPE_FORMAT_Z16_UNORM) {
+ float zvals[4];
+ eval_z(setup, (float) x, (float) y, zvals);
+
+ if (tile_status_z[setup->ty][setup->tx] == TILE_STATUS_CLEAR) {
+ /* now, _really_ clear the tile */
+ clear_tile_z(ztile, fb.depth_clear_value);
+ }
+ else {
+ /* make sure we've got the tile from main mem */
+ wait_on_mask(1 << TAG_READ_TILE_Z);
+ }
+ tile_status_z[setup->ty][setup->tx] = TILE_STATUS_DIRTY;
+
+ if (mask & MASK_TOP_LEFT) {
+ z = (uint) (zvals[0] * 65535.0);
+ if (z < ztile[iy][ix])
+ ztile[iy][ix] = z;
+ else
+ mask &= ~MASK_TOP_LEFT;
+ }
+
+ if (mask & MASK_TOP_RIGHT) {
+ z = (uint) (zvals[1] * 65535.0);
+ if (z < ztile[iy][ix+1])
+ ztile[iy][ix+1] = z;
+ else
+ mask &= ~MASK_TOP_RIGHT;
+ }
+
+ if (mask & MASK_BOTTOM_LEFT) {
+ z = (uint) (zvals[2] * 65535.0);
+ if (z < ztile[iy+1][ix])
+ ztile[iy+1][ix] = z;
+ else
+ mask &= ~MASK_BOTTOM_LEFT;
+ }
+
+ if (mask & MASK_BOTTOM_RIGHT) {
+ z = (uint) (zvals[3] * 65535.0);
+ if (z < ztile[iy+1][ix+1])
+ ztile[iy+1][ix+1] = z;
+ else
+ mask &= ~MASK_BOTTOM_RIGHT;
+ }
+ }
+
+ if (mask) {
+ if (tile_status[setup->ty][setup->tx] == TILE_STATUS_CLEAR) {
+ /* now, _really_ clear the tile */
+ clear_tile(ctile, fb.color_clear_value);
+ }
+ else {
+ /* make sure we've got the tile from main mem */
+ wait_on_mask(1 << TAG_READ_TILE_COLOR);
+ }
+ tile_status[setup->ty][setup->tx] = TILE_STATUS_DIRTY;
+
+ if (mask & MASK_TOP_LEFT)
+ ctile[iy][ix] = pack_color(colors[QUAD_TOP_LEFT]);
+ if (mask & MASK_TOP_RIGHT)
+ ctile[iy][ix+1] = pack_color(colors[QUAD_TOP_RIGHT]);
+ if (mask & MASK_BOTTOM_LEFT)
+ ctile[iy+1][ix] = pack_color(colors[QUAD_BOTTOM_LEFT]);
+ if (mask & MASK_BOTTOM_RIGHT)
+ ctile[iy+1][ix+1] = pack_color(colors[QUAD_BOTTOM_RIGHT]);
+ }
+#endif
+}
+
+
+/**
+ * Given an X or Y coordinate, return the block/quad coordinate that it
+ * belongs to.
+ */
+static INLINE int block( int x )
+{
+ return x & ~1;
+}
+
+
+/**
+ * Compute mask which indicates which pixels in the 2x2 quad are actually inside
+ * the triangle's bounds.
+ *
+ * this is pretty nasty... may need to rework flush_spans again to
+ * fix it, if possible.
+ */
+static unsigned calculate_mask( struct setup_stage *setup, int x )
+{
+ unsigned mask = 0x0;
+
+ if (x >= setup->span.left[0] && x < setup->span.right[0])
+ mask |= MASK_TOP_LEFT;
+
+ if (x >= setup->span.left[1] && x < setup->span.right[1])
+ mask |= MASK_BOTTOM_LEFT;
+
+ if (x+1 >= setup->span.left[0] && x+1 < setup->span.right[0])
+ mask |= MASK_TOP_RIGHT;
+
+ if (x+1 >= setup->span.left[1] && x+1 < setup->span.right[1])
+ mask |= MASK_BOTTOM_RIGHT;
+
+ return mask;
+}
+
+
+/**
+ * Render a horizontal span of quads
+ */
+static void flush_spans( struct setup_stage *setup )
+{
+ int minleft, maxright;
+ int x;
+
+ switch (setup->span.y_flags) {
+ case 0x3:
+ /* both odd and even lines written (both quad rows) */
+ minleft = MIN2(setup->span.left[0], setup->span.left[1]);
+ maxright = MAX2(setup->span.right[0], setup->span.right[1]);
+ break;
+
+ case 0x1:
+ /* only even line written (quad top row) */
+ minleft = setup->span.left[0];
+ maxright = setup->span.right[0];
+ break;
+
+ case 0x2:
+ /* only odd line written (quad bottom row) */
+ minleft = setup->span.left[1];
+ maxright = setup->span.right[1];
+ break;
+
+ default:
+ return;
+ }
+
+ /* XXX this loop could be moved into the above switch cases and
+ * calculate_mask() could be simplified a bit...
+ */
+ for (x = block(minleft); x <= block(maxright); x += 2) {
+ emit_quad( setup, x, setup->span.y,
+ calculate_mask( setup, x ) );
+ }
+
+ setup->span.y = 0;
+ setup->span.y_flags = 0;
+ setup->span.right[0] = 0;
+ setup->span.right[1] = 0;
+}
+
+#if DEBUG_VERTS
+static void print_vertex(const struct setup_stage *setup,
+ const struct vertex_header *v)
+{
+ int i;
+ fprintf(stderr, "Vertex: (%p)\n", v);
+ for (i = 0; i < setup->quad.nr_attrs; i++) {
+ fprintf(stderr, " %d: %f %f %f %f\n", i,
+ v->data[i][0], v->data[i][1], v->data[i][2], v->data[i][3]);
+ }
+}
+#endif
+
+static boolean setup_sort_vertices( struct setup_stage *setup,
+ const struct prim_header *prim )
+{
+ const struct vertex_header *v0 = prim->v[0];
+ const struct vertex_header *v1 = prim->v[1];
+ const struct vertex_header *v2 = prim->v[2];
+
+#if DEBUG_VERTS
+ fprintf(stderr, "Triangle:\n");
+ print_vertex(setup, v0);
+ print_vertex(setup, v1);
+ print_vertex(setup, v2);
+#endif
+
+ setup->vprovoke = v2;
+
+ /* determine bottom to top order of vertices */
+ {
+ float y0 = v0->data[0][1];
+ float y1 = v1->data[0][1];
+ float y2 = v2->data[0][1];
+ if (y0 <= y1) {
+ if (y1 <= y2) {
+ /* y0<=y1<=y2 */
+ setup->vmin = v0;
+ setup->vmid = v1;
+ setup->vmax = v2;
+ }
+ else if (y2 <= y0) {
+ /* y2<=y0<=y1 */
+ setup->vmin = v2;
+ setup->vmid = v0;
+ setup->vmax = v1;
+ }
+ else {
+ /* y0<=y2<=y1 */
+ setup->vmin = v0;
+ setup->vmid = v2;
+ setup->vmax = v1;
+ }
+ }
+ else {
+ if (y0 <= y2) {
+ /* y1<=y0<=y2 */
+ setup->vmin = v1;
+ setup->vmid = v0;
+ setup->vmax = v2;
+ }
+ else if (y2 <= y1) {
+ /* y2<=y1<=y0 */
+ setup->vmin = v2;
+ setup->vmid = v1;
+ setup->vmax = v0;
+ }
+ else {
+ /* y1<=y2<=y0 */
+ setup->vmin = v1;
+ setup->vmid = v2;
+ setup->vmax = v0;
+ }
+ }
+ }
+
+ /* Check if triangle is completely outside the tile bounds */
+ if (setup->vmin->data[0][1] > setup->cliprect_maxy)
+ return FALSE;
+ if (setup->vmax->data[0][1] < setup->cliprect_miny)
+ return FALSE;
+ if (setup->vmin->data[0][0] < setup->cliprect_minx &&
+ setup->vmid->data[0][0] < setup->cliprect_minx &&
+ setup->vmax->data[0][0] < setup->cliprect_minx)
+ return FALSE;
+ if (setup->vmin->data[0][0] > setup->cliprect_maxx &&
+ setup->vmid->data[0][0] > setup->cliprect_maxx &&
+ setup->vmax->data[0][0] > setup->cliprect_maxx)
+ return FALSE;
+
+ setup->ebot.dx = setup->vmid->data[0][0] - setup->vmin->data[0][0];
+ setup->ebot.dy = setup->vmid->data[0][1] - setup->vmin->data[0][1];
+ setup->emaj.dx = setup->vmax->data[0][0] - setup->vmin->data[0][0];
+ setup->emaj.dy = setup->vmax->data[0][1] - setup->vmin->data[0][1];
+ setup->etop.dx = setup->vmax->data[0][0] - setup->vmid->data[0][0];
+ setup->etop.dy = setup->vmax->data[0][1] - setup->vmid->data[0][1];
+
+ /*
+ * Compute triangle's area. Use 1/area to compute partial
+ * derivatives of attributes later.
+ *
+ * The area will be the same as prim->det, but the sign may be
+ * different depending on how the vertices get sorted above.
+ *
+ * To determine whether the primitive is front or back facing we
+ * use the prim->det value because its sign is correct.
+ */
+ {
+ const float area = (setup->emaj.dx * setup->ebot.dy -
+ setup->ebot.dx * setup->emaj.dy);
+
+ setup->oneoverarea = 1.0f / area;
+ /*
+ _mesa_printf("%s one-over-area %f area %f det %f\n",
+ __FUNCTION__, setup->oneoverarea, area, prim->det );
+ */
+ }
+
+#if 0
+ /* We need to know if this is a front or back-facing triangle for:
+ * - the GLSL gl_FrontFacing fragment attribute (bool)
+ * - two-sided stencil test
+ */
+ setup->quad.facing = (prim->det > 0.0) ^ (setup->softpipe->rasterizer->front_winding == PIPE_WINDING_CW);
+#endif
+
+ return TRUE;
+}
+
+
+#if 0
+/**
+ * Compute a0 for a constant-valued coefficient (GL_FLAT shading).
+ * The value value comes from vertex->data[slot][i].
+ * The result will be put into setup->coef[slot].a0[i].
+ * \param slot which attribute slot
+ * \param i which component of the slot (0..3)
+ */
+static void const_coeff( struct setup_stage *setup,
+ unsigned slot,
+ unsigned i )
+{
+ assert(slot < PIPE_MAX_SHADER_INPUTS);
+ assert(i <= 3);
+
+ setup->coef[slot].dadx[i] = 0;
+ setup->coef[slot].dady[i] = 0;
+
+ /* need provoking vertex info!
+ */
+ setup->coef[slot].a0[i] = setup->vprovoke->data[slot][i];
+}
+#endif
+
+
+/**
+ * Compute a0, dadx and dady for a linearly interpolated coefficient,
+ * for a triangle.
+ */
+static void tri_linear_coeff( struct setup_stage *setup,
+ uint slot, uint firstComp, uint lastComp )
+{
+ uint i;
+ for (i = firstComp; i < lastComp; i++) {
+ float botda = setup->vmid->data[slot][i] - setup->vmin->data[slot][i];
+ float majda = setup->vmax->data[slot][i] - setup->vmin->data[slot][i];
+ float a = setup->ebot.dy * majda - botda * setup->emaj.dy;
+ float b = setup->emaj.dx * botda - majda * setup->ebot.dx;
+
+ ASSERT(slot < PIPE_MAX_SHADER_INPUTS);
+
+ setup->coef[slot].dadx[i] = a * setup->oneoverarea;
+ setup->coef[slot].dady[i] = b * setup->oneoverarea;
+
+ /* calculate a0 as the value which would be sampled for the
+ * fragment at (0,0), taking into account that we want to sample at
+ * pixel centers, in other words (0.5, 0.5).
+ *
+ * this is neat but unfortunately not a good way to do things for
+ * triangles with very large values of dadx or dady as it will
+ * result in the subtraction and re-addition from a0 of a very
+ * large number, which means we'll end up loosing a lot of the
+ * fractional bits and precision from a0. the way to fix this is
+ * to define a0 as the sample at a pixel center somewhere near vmin
+ * instead - i'll switch to this later.
+ */
+ setup->coef[slot].a0[i] = (setup->vmin->data[slot][i] -
+ (setup->coef[slot].dadx[i] * (setup->vmin->data[0][0] - 0.5f) +
+ setup->coef[slot].dady[i] * (setup->vmin->data[0][1] - 0.5f)));
+ }
+
+ /*
+ _mesa_printf("attr[%d].%c: %f dx:%f dy:%f\n",
+ slot, "xyzw"[i],
+ setup->coef[slot].a0[i],
+ setup->coef[slot].dadx[i],
+ setup->coef[slot].dady[i]);
+ */
+}
+
+
+#if 0
+/**
+ * Compute a0, dadx and dady for a perspective-corrected interpolant,
+ * for a triangle.
+ * We basically multiply the vertex value by 1/w before computing
+ * the plane coefficients (a0, dadx, dady).
+ * Later, when we compute the value at a particular fragment position we'll
+ * divide the interpolated value by the interpolated W at that fragment.
+ */
+static void tri_persp_coeff( struct setup_stage *setup,
+ unsigned slot,
+ unsigned i )
+{
+ /* premultiply by 1/w:
+ */
+ float mina = setup->vmin->data[slot][i] * setup->vmin->data[0][3];
+ float mida = setup->vmid->data[slot][i] * setup->vmid->data[0][3];
+ float maxa = setup->vmax->data[slot][i] * setup->vmax->data[0][3];
+
+ float botda = mida - mina;
+ float majda = maxa - mina;
+ float a = setup->ebot.dy * majda - botda * setup->emaj.dy;
+ float b = setup->emaj.dx * botda - majda * setup->ebot.dx;
+
+ /*
+ printf("tri persp %d,%d: %f %f %f\n", slot, i,
+ setup->vmin->data[slot][i],
+ setup->vmid->data[slot][i],
+ setup->vmax->data[slot][i]
+ );
+ */
+
+ assert(slot < PIPE_MAX_SHADER_INPUTS);
+ assert(i <= 3);
+
+ setup->coef[slot].dadx[i] = a * setup->oneoverarea;
+ setup->coef[slot].dady[i] = b * setup->oneoverarea;
+ setup->coef[slot].a0[i] = (mina -
+ (setup->coef[slot].dadx[i] * (setup->vmin->data[0][0] - 0.5f) +
+ setup->coef[slot].dady[i] * (setup->vmin->data[0][1] - 0.5f)));
+}
+#endif
+
+
+/**
+ * Compute the setup->coef[] array dadx, dady, a0 values.
+ * Must be called after setup->vmin,vmid,vmax,vprovoke are initialized.
+ */
+static void setup_tri_coefficients( struct setup_stage *setup )
+{
+#if 0
+ const enum interp_mode *interp = setup->softpipe->vertex_info.interp_mode;
+ unsigned slot, j;
+
+ /* z and w are done by linear interpolation:
+ */
+ tri_linear_coeff(setup, 0, 2);
+ tri_linear_coeff(setup, 0, 3);
+
+ /* setup interpolation for all the remaining attributes:
+ */
+ for (slot = 1; slot < setup->quad.nr_attrs; slot++) {
+ switch (interp[slot]) {
+ case INTERP_CONSTANT:
+ for (j = 0; j < NUM_CHANNELS; j++)
+ const_coeff(setup, slot, j);
+ break;
+
+ case INTERP_LINEAR:
+ for (j = 0; j < NUM_CHANNELS; j++)
+ tri_linear_coeff(setup, slot, j);
+ break;
+
+ case INTERP_PERSPECTIVE:
+ for (j = 0; j < NUM_CHANNELS; j++)
+ tri_persp_coeff(setup, slot, j);
+ break;
+
+ default:
+ /* invalid interp mode */
+ assert(0);
+ }
+ }
+#else
+ tri_linear_coeff(setup, 0, 2, 3); /* slot 0, z */
+ tri_linear_coeff(setup, 1, 0, 4); /* slot 1, color */
+#endif
+}
+
+
+static void setup_tri_edges( struct setup_stage *setup )
+{
+ float vmin_x = setup->vmin->data[0][0] + 0.5f;
+ float vmid_x = setup->vmid->data[0][0] + 0.5f;
+
+ float vmin_y = setup->vmin->data[0][1] - 0.5f;
+ float vmid_y = setup->vmid->data[0][1] - 0.5f;
+ float vmax_y = setup->vmax->data[0][1] - 0.5f;
+
+ setup->emaj.sy = CEILF(vmin_y);
+ setup->emaj.lines = (int) CEILF(vmax_y - setup->emaj.sy);
+ setup->emaj.dxdy = setup->emaj.dx / setup->emaj.dy;
+ setup->emaj.sx = vmin_x + (setup->emaj.sy - vmin_y) * setup->emaj.dxdy;
+
+ setup->etop.sy = CEILF(vmid_y);
+ setup->etop.lines = (int) CEILF(vmax_y - setup->etop.sy);
+ setup->etop.dxdy = setup->etop.dx / setup->etop.dy;
+ setup->etop.sx = vmid_x + (setup->etop.sy - vmid_y) * setup->etop.dxdy;
+
+ setup->ebot.sy = CEILF(vmin_y);
+ setup->ebot.lines = (int) CEILF(vmid_y - setup->ebot.sy);
+ setup->ebot.dxdy = setup->ebot.dx / setup->ebot.dy;
+ setup->ebot.sx = vmin_x + (setup->ebot.sy - vmin_y) * setup->ebot.dxdy;
+}
+
+
+/**
+ * Render the upper or lower half of a triangle.
+ * Scissoring/cliprect is applied here too.
+ */
+static void subtriangle( struct setup_stage *setup,
+ struct edge *eleft,
+ struct edge *eright,
+ unsigned lines )
+{
+ const int minx = setup->cliprect_minx;
+ const int maxx = setup->cliprect_maxx;
+ const int miny = setup->cliprect_miny;
+ const int maxy = setup->cliprect_maxy;
+ int y, start_y, finish_y;
+ int sy = (int)eleft->sy;
+
+ ASSERT((int)eleft->sy == (int) eright->sy);
+
+ /* clip top/bottom */
+ start_y = sy;
+ finish_y = sy + lines;
+
+ if (start_y < miny)
+ start_y = miny;
+
+ if (finish_y > maxy)
+ finish_y = maxy;
+
+ start_y -= sy;
+ finish_y -= sy;
+
+ /*
+ _mesa_printf("%s %d %d\n", __FUNCTION__, start_y, finish_y);
+ */
+
+ for (y = start_y; y < finish_y; y++) {
+
+ /* avoid accumulating adds as floats don't have the precision to
+ * accurately iterate large triangle edges that way. luckily we
+ * can just multiply these days.
+ *
+ * this is all drowned out by the attribute interpolation anyway.
+ */
+ int left = (int)(eleft->sx + y * eleft->dxdy);
+ int right = (int)(eright->sx + y * eright->dxdy);
+
+ /* clip left/right */
+ if (left < minx)
+ left = minx;
+ if (right > maxx)
+ right = maxx;
+
+ if (left < right) {
+ int _y = sy + y;
+ if (block(_y) != setup->span.y) {
+ flush_spans(setup);
+ setup->span.y = block(_y);
+ }
+
+ setup->span.left[_y&1] = left;
+ setup->span.right[_y&1] = right;
+ setup->span.y_flags |= 1<<(_y&1);
+ }
+ }
+
+
+ /* save the values so that emaj can be restarted:
+ */
+ eleft->sx += lines * eleft->dxdy;
+ eright->sx += lines * eright->dxdy;
+ eleft->sy += lines;
+ eright->sy += lines;
+}
+
+
+/**
+ * Do setup for triangle rasterization, then render the triangle.
+ */
+static void
+setup_tri(struct setup_stage *setup, struct prim_header *prim)
+{
+ if (!setup_sort_vertices( setup, prim )) {
+ return; /* totally clipped */
+ }
+
+ setup_tri_coefficients( setup );
+ setup_tri_edges( setup );
+
+#if 0
+ setup->quad.prim = PRIM_TRI;
+#endif
+
+ setup->span.y = 0;
+ setup->span.y_flags = 0;
+ setup->span.right[0] = 0;
+ setup->span.right[1] = 0;
+ /* setup->span.z_mode = tri_z_mode( setup->ctx ); */
+
+ /* init_constant_attribs( setup ); */
+
+ if (setup->oneoverarea < 0.0) {
+ /* emaj on left:
+ */
+ subtriangle( setup, &setup->emaj, &setup->ebot, setup->ebot.lines );
+ subtriangle( setup, &setup->emaj, &setup->etop, setup->etop.lines );
+ }
+ else {
+ /* emaj on right:
+ */
+ subtriangle( setup, &setup->ebot, &setup->emaj, setup->ebot.lines );
+ subtriangle( setup, &setup->etop, &setup->emaj, setup->etop.lines );
+ }
+
+ flush_spans( setup );
+}
+
+
+
+/**
+ * Draw triangle into tile at (tx, ty) (tile coords)
+ * The tile data should have already been fetched.
+ */
+void
+tri_draw(const float *v0, const float *v1, const float *v2, uint tx, uint ty)
+{
+ struct prim_header tri;
+ struct setup_stage setup;
+
+ tri.v[0] = (struct vertex_header *) v0;
+ tri.v[1] = (struct vertex_header *) v1;
+ tri.v[2] = (struct vertex_header *) v2;
+
+ setup.tx = tx;
+ setup.ty = ty;
+
+ /* set clipping bounds to tile bounds */
+ setup.cliprect_minx = tx * TILE_SIZE;
+ setup.cliprect_miny = ty * TILE_SIZE;
+ setup.cliprect_maxx = (tx + 1) * TILE_SIZE;
+ setup.cliprect_maxy = (ty + 1) * TILE_SIZE;
+
+ setup_tri(&setup, &tri);
+}
--- /dev/null
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+
+#ifndef SPU_TRI_H
+#define SPU_TRI_H
+
+
+extern void
+tri_draw(const float *v0, const float *v1, const float *v2, uint tx, uint ty);
+
+
+#endif /* SPU_TRI_H */
projects / mesa.git / commitdiff