/*
* Copyright 2009 Corbin Simpson <MostAwesomeDude@gmail.com>
* Copyright 2010 Marek Olšák <maraeo@gmail.com>
*
* 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
* on 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
* THE AUTHOR(S) AND/OR THEIR 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. */
/* r300_render: Vertex and index buffer primitive emission. Contains both
* HW TCL fastpath rendering, and SW TCL Draw-assisted rendering. */
#include "draw/draw_context.h"
#include "draw/draw_vbuf.h"
#include "util/u_inlines.h"
#include "util/u_format.h"
#include "util/u_memory.h"
#include "util/u_upload_mgr.h"
#include "util/u_prim.h"
#include "r300_cs.h"
#include "r300_context.h"
#include "r300_screen_buffer.h"
#include "r300_emit.h"
#include "r300_reg.h"
#include <limits.h>
#define IMMD_DWORDS 32
static uint32_t r300_translate_primitive(unsigned prim)
{
static const int prim_conv[] = {
R300_VAP_VF_CNTL__PRIM_POINTS,
R300_VAP_VF_CNTL__PRIM_LINES,
R300_VAP_VF_CNTL__PRIM_LINE_LOOP,
R300_VAP_VF_CNTL__PRIM_LINE_STRIP,
R300_VAP_VF_CNTL__PRIM_TRIANGLES,
R300_VAP_VF_CNTL__PRIM_TRIANGLE_STRIP,
R300_VAP_VF_CNTL__PRIM_TRIANGLE_FAN,
R300_VAP_VF_CNTL__PRIM_QUADS,
R300_VAP_VF_CNTL__PRIM_QUAD_STRIP,
R300_VAP_VF_CNTL__PRIM_POLYGON,
-1,
-1,
-1,
-1
};
unsigned hwprim = prim_conv[prim];
assert(hwprim != -1);
return hwprim;
}
static uint32_t r300_provoking_vertex_fixes(struct r300_context *r300,
unsigned mode)
{
struct r300_rs_state* rs = (struct r300_rs_state*)r300->rs_state.state;
uint32_t color_control = rs->color_control;
/* By default (see r300_state.c:r300_create_rs_state) color_control is
* initialized to provoking the first vertex.
*
* Triangle fans must be reduced to the second vertex, not the first, in
* Gallium flatshade-first mode, as per the GL spec.
* (http://www.opengl.org/registry/specs/ARB/provoking_vertex.txt)
*
* Quads never provoke correctly in flatshade-first mode. The first
* vertex is never considered as provoking, so only the second, third,
* and fourth vertices can be selected, and both "third" and "last" modes
* select the fourth vertex. This is probably due to D3D lacking quads.
*
* Similarly, polygons reduce to the first, not the last, vertex, when in
* "last" mode, and all other modes start from the second vertex.
*
* ~ C.
*/
if (rs->rs.flatshade_first) {
switch (mode) {
case PIPE_PRIM_TRIANGLE_FAN:
color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_SECOND;
break;
case PIPE_PRIM_QUADS:
case PIPE_PRIM_QUAD_STRIP:
case PIPE_PRIM_POLYGON:
color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST;
break;
default:
color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_FIRST;
break;
}
} else {
color_control |= R300_GA_COLOR_CONTROL_PROVOKING_VERTEX_LAST;
}
return color_control;
}
void r500_emit_index_bias(struct r300_context *r300, int index_bias)
{
CS_LOCALS(r300);
BEGIN_CS(2);
OUT_CS_REG(R500_VAP_INDEX_OFFSET,
(index_bias & 0xFFFFFF) | (index_bias < 0 ? 1<<24 : 0));
END_CS;
}
static void r300_emit_draw_init(struct r300_context *r300, unsigned mode,
unsigned max_index)
{
CS_LOCALS(r300);
assert(max_index < (1 << 24));
BEGIN_CS(5);
OUT_CS_REG(R300_GA_COLOR_CONTROL,
r300_provoking_vertex_fixes(r300, mode));
OUT_CS_REG_SEQ(R300_VAP_VF_MAX_VTX_INDX, 2);
OUT_CS(max_index);
OUT_CS(0);
END_CS;
}
/* This function splits the index bias value into two parts:
* - buffer_offset: the value that can be safely added to buffer offsets
* in r300_emit_vertex_arrays (it must yield a positive offset when added to
* a vertex buffer offset)
* - index_offset: the value that must be manually subtracted from indices
* in an index buffer to achieve negative offsets. */
static void r300_split_index_bias(struct r300_context *r300, int index_bias,
int *buffer_offset, int *index_offset)
{
struct pipe_vertex_buffer *vb, *vbufs = r300->vertex_buffer;
struct pipe_vertex_element *velem = r300->velems->velem;
unsigned i, size;
int max_neg_bias;
if (index_bias < 0) {
/* See how large index bias we may subtract. We must be careful
* here because negative buffer offsets are not allowed
* by the DRM API. */
max_neg_bias = INT_MAX;
for (i = 0; i < r300->velems->count; i++) {
vb = &vbufs[velem[i].vertex_buffer_index];
size = (vb->buffer_offset + velem[i].src_offset) / vb->stride;
max_neg_bias = MIN2(max_neg_bias, size);
}
/* Now set the minimum allowed value. */
*buffer_offset = MAX2(-max_neg_bias, index_bias);
} else {
/* A positive index bias is OK. */
*buffer_offset = index_bias;
}
*index_offset = index_bias - *buffer_offset;
}
enum r300_prepare_flags {
PREP_EMIT_STATES = (1 << 0), /* call emit_dirty_state and friends? */
PREP_VALIDATE_VBOS = (1 << 1), /* validate VBOs? */
PREP_EMIT_VARRAYS = (1 << 2), /* call emit_vertex_arrays? */
PREP_EMIT_VARRAYS_SWTCL = (1 << 3), /* call emit_vertex_arrays_swtcl? */
PREP_INDEXED = (1 << 4) /* is this draw_elements? */
};
/**
* Check if the requested number of dwords is available in the CS and
* if not, flush.
* \param r300 The context.
* \param flags See r300_prepare_flags.
* \param cs_dwords The number of dwords to reserve in CS.
* \return TRUE if the CS was flushed
*/
static boolean r300_reserve_cs_dwords(struct r300_context *r300,
enum r300_prepare_flags flags,
unsigned cs_dwords)
{
boolean flushed = FALSE;
boolean emit_states = flags & PREP_EMIT_STATES;
boolean emit_vertex_arrays = flags & PREP_EMIT_VARRAYS;
boolean emit_vertex_arrays_swtcl = flags & PREP_EMIT_VARRAYS_SWTCL;
/* Add dirty state, index offset, and AOS. */
if (emit_states)
cs_dwords += r300_get_num_dirty_dwords(r300);
if (r300->screen->caps.is_r500)
cs_dwords += 2; /* emit_index_offset */
if (emit_vertex_arrays)
cs_dwords += 55; /* emit_vertex_arrays */
if (emit_vertex_arrays_swtcl)
cs_dwords += 7; /* emit_vertex_arrays_swtcl */
cs_dwords += r300_get_num_cs_end_dwords(r300);
/* Reserve requested CS space. */
if (!r300->rws->cs_check_space(r300->cs, cs_dwords)) {
r300_flush(&r300->context, PIPE_FLUSH_ASYNC, NULL);
flushed = TRUE;
}
return flushed;
}
/**
* Validate buffers and emit dirty state.
* \param r300 The context.
* \param flags See r300_prepare_flags.
* \param index_buffer The index buffer to validate. The parameter may be NULL.
* \param buffer_offset The offset passed to emit_vertex_arrays.
* \param index_bias The index bias to emit.
* \param instance_id Index of instance to render
* \return TRUE if rendering should be skipped
*/
static boolean r300_emit_states(struct r300_context *r300,
enum r300_prepare_flags flags,
struct pipe_resource *index_buffer,
int buffer_offset,
int index_bias, int instance_id)
{
boolean emit_states = flags & PREP_EMIT_STATES;
boolean emit_vertex_arrays = flags & PREP_EMIT_VARRAYS;
boolean emit_vertex_arrays_swtcl = flags & PREP_EMIT_VARRAYS_SWTCL;
boolean indexed = flags & PREP_INDEXED;
boolean validate_vbos = flags & PREP_VALIDATE_VBOS;
/* Validate buffers and emit dirty state if needed. */
if (emit_states || (emit_vertex_arrays && validate_vbos)) {
if (!r300_emit_buffer_validate(r300, validate_vbos,
index_buffer)) {
fprintf(stderr, "r300: CS space validation failed. "
"(not enough memory?) Skipping rendering.\n");
return FALSE;
}
}
if (emit_states)
r300_emit_dirty_state(r300);
if (r300->screen->caps.is_r500) {
if (r300->screen->caps.has_tcl)
r500_emit_index_bias(r300, index_bias);
else
r500_emit_index_bias(r300, 0);
}
if (emit_vertex_arrays &&
(r300->vertex_arrays_dirty ||
r300->vertex_arrays_indexed != indexed ||
r300->vertex_arrays_offset != buffer_offset ||
r300->vertex_arrays_instance_id != instance_id)) {
r300_emit_vertex_arrays(r300, buffer_offset, indexed, instance_id);
r300->vertex_arrays_dirty = FALSE;
r300->vertex_arrays_indexed = indexed;
r300->vertex_arrays_offset = buffer_offset;
r300->vertex_arrays_instance_id = instance_id;
}
if (emit_vertex_arrays_swtcl)
r300_emit_vertex_arrays_swtcl(r300, indexed);
return TRUE;
}
/**
* Check if the requested number of dwords is available in the CS and
* if not, flush. Then validate buffers and emit dirty state.
* \param r300 The context.
* \param flags See r300_prepare_flags.
* \param index_buffer The index buffer to validate. The parameter may be NULL.
* \param cs_dwords The number of dwords to reserve in CS.
* \param buffer_offset The offset passed to emit_vertex_arrays.
* \param index_bias The index bias to emit.
* \param instance_id The instance to render.
* \return TRUE if rendering should be skipped
*/
static boolean r300_prepare_for_rendering(struct r300_context *r300,
enum r300_prepare_flags flags,
struct pipe_resource *index_buffer,
unsigned cs_dwords,
int buffer_offset,
int index_bias,
int instance_id)
{
/* Make sure there is enough space in the command stream and emit states. */
if (r300_reserve_cs_dwords(r300, flags, cs_dwords))
flags |= PREP_EMIT_STATES;
return r300_emit_states(r300, flags, index_buffer, buffer_offset,
index_bias, instance_id);
}
static boolean immd_is_good_idea(struct r300_context *r300,
unsigned count)
{
if (DBG_ON(r300, DBG_NO_IMMD)) {
return FALSE;
}
if (count * r300->velems->vertex_size_dwords > IMMD_DWORDS) {
return FALSE;
}
/* Buffers can only be used for read by r300 (except query buffers, but
* those can't be bound by a state tracker as vertex buffers). */
return TRUE;
}
/*****************************************************************************
* The HWTCL draw functions. *
****************************************************************************/
static void r300_draw_arrays_immediate(struct r300_context *r300,
const struct pipe_draw_info *info)
{
struct pipe_vertex_element* velem;
struct pipe_vertex_buffer* vbuf;
unsigned vertex_element_count = r300->velems->count;
unsigned i, v, vbi;
/* Size of the vertex, in dwords. */
unsigned vertex_size = r300->velems->vertex_size_dwords;
/* The number of dwords for this draw operation. */
unsigned dwords = 4 + info->count * vertex_size;
/* Size of the vertex element, in dwords. */
unsigned size[PIPE_MAX_ATTRIBS];
/* Stride to the same attrib in the next vertex in the vertex buffer,
* in dwords. */
unsigned stride[PIPE_MAX_ATTRIBS];
/* Mapped vertex buffers. */
uint32_t* map[PIPE_MAX_ATTRIBS] = {0};
uint32_t* mapelem[PIPE_MAX_ATTRIBS];
CS_LOCALS(r300);
if (!r300_prepare_for_rendering(r300, PREP_EMIT_STATES, NULL, dwords, 0, 0, -1))
return;
/* Calculate the vertex size, offsets, strides etc. and map the buffers. */
for (i = 0; i < vertex_element_count; i++) {
velem = &r300->velems->velem[i];
size[i] = r300->velems->format_size[i] / 4;
vbi = velem->vertex_buffer_index;
vbuf = &r300->vertex_buffer[vbi];
stride[i] = vbuf->stride / 4;
/* Map the buffer. */
if (!map[vbi]) {
map[vbi] = (uint32_t*)r300->rws->buffer_map(
r300_resource(vbuf->buffer.resource)->buf,
r300->cs, PIPE_TRANSFER_READ | PIPE_TRANSFER_UNSYNCHRONIZED);
map[vbi] += (vbuf->buffer_offset / 4) + stride[i] * info->start;
}
mapelem[i] = map[vbi] + (velem->src_offset / 4);
}
r300_emit_draw_init(r300, info->mode, info->count-1);
BEGIN_CS(dwords);
OUT_CS_REG(R300_VAP_VTX_SIZE, vertex_size);
OUT_CS_PKT3(R300_PACKET3_3D_DRAW_IMMD_2, info->count * vertex_size);
OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_EMBEDDED | (info->count << 16) |
r300_translate_primitive(info->mode));
/* Emit vertices. */
for (v = 0; v < info->count; v++) {
for (i = 0; i < vertex_element_count; i++) {
OUT_CS_TABLE(&mapelem[i][stride[i] * v], size[i]);
}
}
END_CS;
}
static void r300_emit_draw_arrays(struct r300_context *r300,
unsigned mode,
unsigned count)
{
boolean alt_num_verts = count > 65535;
CS_LOCALS(r300);
if (count >= (1 << 24)) {
fprintf(stderr, "r300: Got a huge number of vertices: %i, "
"refusing to render.\n", count);
return;
}
r300_emit_draw_init(r300, mode, count-1);
BEGIN_CS(2 + (alt_num_verts ? 2 : 0));
if (alt_num_verts) {
OUT_CS_REG(R500_VAP_ALT_NUM_VERTICES, count);
}
OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) |
r300_translate_primitive(mode) |
(alt_num_verts ? R500_VAP_VF_CNTL__USE_ALT_NUM_VERTS : 0));
END_CS;
}
static void r300_emit_draw_elements(struct r300_context *r300,
struct pipe_resource* indexBuffer,
unsigned indexSize,
unsigned max_index,
unsigned mode,
unsigned start,
unsigned count,
uint16_t *imm_indices3)
{
uint32_t count_dwords, offset_dwords;
boolean alt_num_verts = count > 65535;
CS_LOCALS(r300);
if (count >= (1 << 24)) {
fprintf(stderr, "r300: Got a huge number of vertices: %i, "
"refusing to render (max_index: %i).\n", count, max_index);
return;
}
DBG(r300, DBG_DRAW, "r300: Indexbuf of %u indices, max %u\n",
count, max_index);
r300_emit_draw_init(r300, mode, max_index);
/* If start is odd, render the first triangle with indices embedded
* in the command stream. This will increase start by 3 and make it
* even. We can then proceed without a fallback. */
if (indexSize == 2 && (start & 1) &&
mode == PIPE_PRIM_TRIANGLES) {
BEGIN_CS(4);
OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, 2);
OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (3 << 16) |
R300_VAP_VF_CNTL__PRIM_TRIANGLES);
OUT_CS(imm_indices3[1] << 16 | imm_indices3[0]);
OUT_CS(imm_indices3[2]);
END_CS;
start += 3;
count -= 3;
if (!count)
return;
}
offset_dwords = indexSize * start / sizeof(uint32_t);
BEGIN_CS(8 + (alt_num_verts ? 2 : 0));
if (alt_num_verts) {
OUT_CS_REG(R500_VAP_ALT_NUM_VERTICES, count);
}
OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, 0);
if (indexSize == 4) {
count_dwords = count;
OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
R300_VAP_VF_CNTL__INDEX_SIZE_32bit |
r300_translate_primitive(mode) |
(alt_num_verts ? R500_VAP_VF_CNTL__USE_ALT_NUM_VERTS : 0));
} else {
count_dwords = (count + 1) / 2;
OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
r300_translate_primitive(mode) |
(alt_num_verts ? R500_VAP_VF_CNTL__USE_ALT_NUM_VERTS : 0));
}
OUT_CS_PKT3(R300_PACKET3_INDX_BUFFER, 2);
OUT_CS(R300_INDX_BUFFER_ONE_REG_WR | (R300_VAP_PORT_IDX0 >> 2) |
(0 << R300_INDX_BUFFER_SKIP_SHIFT));
OUT_CS(offset_dwords << 2);
OUT_CS(count_dwords);
OUT_CS_RELOC(r300_resource(indexBuffer));
END_CS;
}
static void r300_draw_elements_immediate(struct r300_context *r300,
const struct pipe_draw_info *info)
{
const uint8_t *ptr1;
const uint16_t *ptr2;
const uint32_t *ptr4;
unsigned index_size = info->index_size;
unsigned i, count_dwords = index_size == 4 ? info->count :
(info->count + 1) / 2;
CS_LOCALS(r300);
/* 19 dwords for r300_draw_elements_immediate. Give up if the function fails. */
if (!r300_prepare_for_rendering(r300,
PREP_EMIT_STATES | PREP_VALIDATE_VBOS | PREP_EMIT_VARRAYS |
PREP_INDEXED, NULL, 2+count_dwords, 0, info->index_bias, -1))
return;
r300_emit_draw_init(r300, info->mode, info->max_index);
BEGIN_CS(2 + count_dwords);
OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, count_dwords);
switch (index_size) {
case 1:
ptr1 = (uint8_t*)info->index.user;
ptr1 += info->start;
OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (info->count << 16) |
r300_translate_primitive(info->mode));
if (info->index_bias && !r300->screen->caps.is_r500) {
for (i = 0; i < info->count-1; i += 2)
OUT_CS(((ptr1[i+1] + info->index_bias) << 16) |
(ptr1[i] + info->index_bias));
if (info->count & 1)
OUT_CS(ptr1[i] + info->index_bias);
} else {
for (i = 0; i < info->count-1; i += 2)
OUT_CS(((ptr1[i+1]) << 16) |
(ptr1[i] ));
if (info->count & 1)
OUT_CS(ptr1[i]);
}
break;
case 2:
ptr2 = (uint16_t*)info->index.user;
ptr2 += info->start;
OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (info->count << 16) |
r300_translate_primitive(info->mode));
if (info->index_bias && !r300->screen->caps.is_r500) {
for (i = 0; i < info->count-1; i += 2)
OUT_CS(((ptr2[i+1] + info->index_bias) << 16) |
(ptr2[i] + info->index_bias));
if (info->count & 1)
OUT_CS(ptr2[i] + info->index_bias);
} else {
OUT_CS_TABLE(ptr2, count_dwords);
}
break;
case 4:
ptr4 = (uint32_t*)info->index.user;
ptr4 += info->start;
OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (info->count << 16) |
R300_VAP_VF_CNTL__INDEX_SIZE_32bit |
r300_translate_primitive(info->mode));
if (info->index_bias && !r300->screen->caps.is_r500) {
for (i = 0; i < info->count; i++)
OUT_CS(ptr4[i] + info->index_bias);
} else {
OUT_CS_TABLE(ptr4, count_dwords);
}
break;
}
END_CS;
}
static void r300_draw_elements(struct r300_context *r300,
const struct pipe_draw_info *info,
int instance_id)
{
struct pipe_resource *indexBuffer =
info->has_user_indices ? NULL : info->index.resource;
unsigned indexSize = info->index_size;
struct pipe_resource* orgIndexBuffer = indexBuffer;
unsigned start = info->start;
unsigned count = info->count;
boolean alt_num_verts = r300->screen->caps.is_r500 &&
count > 65536;
unsigned short_count;
int buffer_offset = 0, index_offset = 0; /* for index bias emulation */
uint16_t indices3[3];
if (info->index_bias && !r300->screen->caps.is_r500) {
r300_split_index_bias(r300, info->index_bias, &buffer_offset,
&index_offset);
}
r300_translate_index_buffer(r300, info, &indexBuffer,
&indexSize, index_offset, &start, count);
/* Fallback for misaligned ushort indices. */
if (indexSize == 2 && (start & 1) && indexBuffer) {
/* If we got here, then orgIndexBuffer == indexBuffer. */
uint16_t *ptr = r300->rws->buffer_map(r300_resource(orgIndexBuffer)->buf,
r300->cs,
PIPE_TRANSFER_READ |
PIPE_TRANSFER_UNSYNCHRONIZED);
if (info->mode == PIPE_PRIM_TRIANGLES) {
memcpy(indices3, ptr + start, 6);
} else {
/* Copy the mapped index buffer directly to the upload buffer.
* The start index will be aligned simply from the fact that
* every sub-buffer in the upload buffer is aligned. */
r300_upload_index_buffer(r300, &indexBuffer, indexSize, &start,
count, (uint8_t*)ptr);
}
} else {
if (info->has_user_indices)
r300_upload_index_buffer(r300, &indexBuffer, indexSize,
&start, count,
info->index.user);
}
/* 19 dwords for emit_draw_elements. Give up if the function fails. */
if (!r300_prepare_for_rendering(r300,
PREP_EMIT_STATES | PREP_VALIDATE_VBOS | PREP_EMIT_VARRAYS |
PREP_INDEXED, indexBuffer, 19, buffer_offset, info->index_bias,
instance_id))
goto done;
if (alt_num_verts || count <= 65535) {
r300_emit_draw_elements(r300, indexBuffer, indexSize,
info->max_index, info->mode, start, count,
indices3);
} else {
do {
/* The maximum must be divisible by 4 and 3,
* so that quad and triangle lists are split correctly.
*
* Strips, loops, and fans won't work. */
short_count = MIN2(count, 65532);
r300_emit_draw_elements(r300, indexBuffer, indexSize,
info->max_index,
info->mode, start, short_count, indices3);
start += short_count;
count -= short_count;
/* 15 dwords for emit_draw_elements */
if (count) {
if (!r300_prepare_for_rendering(r300,
PREP_VALIDATE_VBOS | PREP_EMIT_VARRAYS | PREP_INDEXED,
indexBuffer, 19, buffer_offset, info->index_bias,
instance_id))
goto done;
}
} while (count);
}
done:
if (indexBuffer != orgIndexBuffer) {
pipe_resource_reference( &indexBuffer, NULL );
}
}
static void r300_draw_arrays(struct r300_context *r300,
const struct pipe_draw_info *info,
int instance_id)
{
boolean alt_num_verts = r300->screen->caps.is_r500 &&
info->count > 65536;
unsigned start = info->start;
unsigned count = info->count;
unsigned short_count;
/* 9 spare dwords for emit_draw_arrays. Give up if the function fails. */
if (!r300_prepare_for_rendering(r300,
PREP_EMIT_STATES | PREP_VALIDATE_VBOS | PREP_EMIT_VARRAYS,
NULL, 9, start, 0, instance_id))
return;
if (alt_num_verts || count <= 65535) {
r300_emit_draw_arrays(r300, info->mode, count);
} else {
do {
/* The maximum must be divisible by 4 and 3,
* so that quad and triangle lists are split correctly.
*
* Strips, loops, and fans won't work. */
short_count = MIN2(count, 65532);
r300_emit_draw_arrays(r300, info->mode, short_count);
start += short_count;
count -= short_count;
/* 9 spare dwords for emit_draw_arrays. Give up if the function fails. */
if (count) {
if (!r300_prepare_for_rendering(r300,
PREP_VALIDATE_VBOS | PREP_EMIT_VARRAYS, NULL, 9,
start, 0, instance_id))
return;
}
} while (count);
}
}
static void r300_draw_arrays_instanced(struct r300_context *r300,
const struct pipe_draw_info *info)
{
int i;
for (i = 0; i < info->instance_count; i++)
r300_draw_arrays(r300, info, i);
}
static void r300_draw_elements_instanced(struct r300_context *r300,
const struct pipe_draw_info *info)
{
int i;
for (i = 0; i < info->instance_count; i++)
r300_draw_elements(r300, info, i);
}
static unsigned r300_max_vertex_count(struct r300_context *r300)
{
unsigned i, nr = r300->velems->count;
struct pipe_vertex_element *velems = r300->velems->velem;
unsigned result = ~0;
for (i = 0; i < nr; i++) {
struct pipe_vertex_buffer *vb =
&r300->vertex_buffer[velems[i].vertex_buffer_index];
unsigned size, max_count, value;
/* We're not interested in constant and per-instance attribs. */
if (!vb->buffer.resource ||
!vb->stride ||
velems[i].instance_divisor) {
continue;
}
size = vb->buffer.resource->width0;
/* Subtract buffer_offset. */
value = vb->buffer_offset;
if (value >= size) {
return 0;
}
size -= value;
/* Subtract src_offset. */
value = velems[i].src_offset;
if (value >= size) {
return 0;
}
size -= value;
/* Subtract format_size. */
value = r300->velems->format_size[i];
if (value >= size) {
return 0;
}
size -= value;
/* Compute the max count. */
max_count = 1 + size / vb->stride;
result = MIN2(result, max_count);
}
return result;
}
static void r300_draw_vbo(struct pipe_context* pipe,
const struct pipe_draw_info *dinfo)
{
struct r300_context* r300 = r300_context(pipe);
struct pipe_draw_info info = *dinfo;
if (r300->skip_rendering ||
!u_trim_pipe_prim(info.mode, &info.count)) {
return;
}
r300_update_derived_state(r300);
/* Draw. */
if (info.index_size) {
unsigned max_count = r300_max_vertex_count(r300);
if (!max_count) {
fprintf(stderr, "r300: Skipping a draw command. There is a buffer "
" which is too small to be used for rendering.\n");
return;
}
if (max_count == ~0) {
/* There are no per-vertex vertex elements. Use the hardware maximum. */
max_count = 0xffffff;
}
info.max_index = max_count - 1;
if (info.instance_count <= 1) {
if (info.count <= 8 && info.has_user_indices) {
r300_draw_elements_immediate(r300, &info);
} else {
r300_draw_elements(r300, &info, -1);
}
} else {
r300_draw_elements_instanced(r300, &info);
}
} else {
if (info.instance_count <= 1) {
if (immd_is_good_idea(r300, info.count)) {
r300_draw_arrays_immediate(r300, &info);
} else {
r300_draw_arrays(r300, &info, -1);
}
} else {
r300_draw_arrays_instanced(r300, &info);
}
}
}
/****************************************************************************
* The rest of this file is for SW TCL rendering only. Please be polite and *
* keep these functions separated so that they are easier to locate. ~C. *
***************************************************************************/
/* SW TCL elements, using Draw. */
static void r300_swtcl_draw_vbo(struct pipe_context* pipe,
const struct pipe_draw_info *info)
{
struct r300_context* r300 = r300_context(pipe);
if (r300->skip_rendering) {
return;
}
if (!u_trim_pipe_prim(info->mode, (unsigned*)&info->count))
return;
if (info->index_size) {
draw_set_indexes(r300->draw,
info->has_user_indices ?
info->index.user :
r300_resource(info->index.resource)->malloced_buffer,
info->index_size, ~0);
}
r300_update_derived_state(r300);
draw_vbo(r300->draw, info);
draw_flush(r300->draw);
}
/* Object for rendering using Draw. */
struct r300_render {
/* Parent class */
struct vbuf_render base;
/* Pipe context */
struct r300_context* r300;
/* Vertex information */
size_t vertex_size;
unsigned prim;
unsigned hwprim;
/* VBO */
size_t vbo_max_used;
uint8_t *vbo_ptr;
};
static inline struct r300_render*
r300_render(struct vbuf_render* render)
{
return (struct r300_render*)render;
}
static const struct vertex_info*
r300_render_get_vertex_info(struct vbuf_render* render)
{
struct r300_render* r300render = r300_render(render);
struct r300_context* r300 = r300render->r300;
return &r300->vertex_info;
}
static boolean r300_render_allocate_vertices(struct vbuf_render* render,
ushort vertex_size,
ushort count)
{
struct r300_render* r300render = r300_render(render);
struct r300_context* r300 = r300render->r300;
struct radeon_winsys *rws = r300->rws;
size_t size = (size_t)vertex_size * (size_t)count;
DBG(r300, DBG_DRAW, "r300: render_allocate_vertices (size: %d)\n", size);
if (!r300->vbo || size + r300->draw_vbo_offset > r300->vbo->size) {
pb_reference(&r300->vbo, NULL);
r300->vbo = NULL;
r300render->vbo_ptr = NULL;
r300->vbo = rws->buffer_create(rws,
MAX2(R300_MAX_DRAW_VBO_SIZE, size),
R300_BUFFER_ALIGNMENT,
RADEON_DOMAIN_GTT, 0);
if (!r300->vbo) {
return FALSE;
}
r300->draw_vbo_offset = 0;
r300render->vbo_ptr = rws->buffer_map(r300->vbo, r300->cs,
PIPE_TRANSFER_WRITE);
}
r300render->vertex_size = vertex_size;
return TRUE;
}
static void* r300_render_map_vertices(struct vbuf_render* render)
{
struct r300_render* r300render = r300_render(render);
struct r300_context* r300 = r300render->r300;
DBG(r300, DBG_DRAW, "r300: render_map_vertices\n");
assert(r300render->vbo_ptr);
return r300render->vbo_ptr + r300->draw_vbo_offset;
}
static void r300_render_unmap_vertices(struct vbuf_render* render,
ushort min,
ushort max)
{
struct r300_render* r300render = r300_render(render);
struct r300_context* r300 = r300render->r300;
DBG(r300, DBG_DRAW, "r300: render_unmap_vertices\n");
r300render->vbo_max_used = MAX2(r300render->vbo_max_used,
r300render->vertex_size * (max + 1));
}
static void r300_render_release_vertices(struct vbuf_render* render)
{
struct r300_render* r300render = r300_render(render);
struct r300_context* r300 = r300render->r300;
DBG(r300, DBG_DRAW, "r300: render_release_vertices\n");
r300->draw_vbo_offset += r300render->vbo_max_used;
r300render->vbo_max_used = 0;
}
static void r300_render_set_primitive(struct vbuf_render* render,
enum pipe_prim_type prim)
{
struct r300_render* r300render = r300_render(render);
r300render->prim = prim;
r300render->hwprim = r300_translate_primitive(prim);
}
static void r300_render_draw_arrays(struct vbuf_render* render,
unsigned start,
unsigned count)
{
struct r300_render* r300render = r300_render(render);
struct r300_context* r300 = r300render->r300;
uint8_t* ptr;
unsigned i;
unsigned dwords = 6;
CS_LOCALS(r300);
(void) i; (void) ptr;
assert(start == 0);
assert(count < (1 << 16));
DBG(r300, DBG_DRAW, "r300: render_draw_arrays (count: %d)\n", count);
if (!r300_prepare_for_rendering(r300,
PREP_EMIT_STATES | PREP_EMIT_VARRAYS_SWTCL,
NULL, dwords, 0, 0, -1)) {
return;
}
BEGIN_CS(dwords);
OUT_CS_REG(R300_GA_COLOR_CONTROL,
r300_provoking_vertex_fixes(r300, r300render->prim));
OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, count - 1);
OUT_CS_PKT3(R300_PACKET3_3D_DRAW_VBUF_2, 0);
OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_LIST | (count << 16) |
r300render->hwprim);
END_CS;
}
static void r300_render_draw_elements(struct vbuf_render* render,
const ushort* indices,
uint count)
{
struct r300_render* r300render = r300_render(render);
struct r300_context* r300 = r300render->r300;
unsigned max_index = (r300->vbo->size - r300->draw_vbo_offset) /
(r300render->r300->vertex_info.size * 4) - 1;
struct pipe_resource *index_buffer = NULL;
unsigned index_buffer_offset;
CS_LOCALS(r300);
DBG(r300, DBG_DRAW, "r300: render_draw_elements (count: %d)\n", count);
u_upload_data(r300->uploader, 0, count * 2, 4, indices,
&index_buffer_offset, &index_buffer);
if (!index_buffer) {
return;
}
if (!r300_prepare_for_rendering(r300,
PREP_EMIT_STATES |
PREP_EMIT_VARRAYS_SWTCL | PREP_INDEXED,
index_buffer, 12, 0, 0, -1)) {
pipe_resource_reference(&index_buffer, NULL);
return;
}
BEGIN_CS(12);
OUT_CS_REG(R300_GA_COLOR_CONTROL,
r300_provoking_vertex_fixes(r300, r300render->prim));
OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, max_index);
OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, 0);
OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
r300render->hwprim);
OUT_CS_PKT3(R300_PACKET3_INDX_BUFFER, 2);
OUT_CS(R300_INDX_BUFFER_ONE_REG_WR | (R300_VAP_PORT_IDX0 >> 2));
OUT_CS(index_buffer_offset);
OUT_CS((count + 1) / 2);
OUT_CS_RELOC(r300_resource(index_buffer));
END_CS;
pipe_resource_reference(&index_buffer, NULL);
}
static void r300_render_destroy(struct vbuf_render* render)
{
FREE(render);
}
static struct vbuf_render* r300_render_create(struct r300_context* r300)
{
struct r300_render* r300render = CALLOC_STRUCT(r300_render);
r300render->r300 = r300;
r300render->base.max_vertex_buffer_bytes = R300_MAX_DRAW_VBO_SIZE;
r300render->base.max_indices = 16 * 1024;
r300render->base.get_vertex_info = r300_render_get_vertex_info;
r300render->base.allocate_vertices = r300_render_allocate_vertices;
r300render->base.map_vertices = r300_render_map_vertices;
r300render->base.unmap_vertices = r300_render_unmap_vertices;
r300render->base.set_primitive = r300_render_set_primitive;
r300render->base.draw_elements = r300_render_draw_elements;
r300render->base.draw_arrays = r300_render_draw_arrays;
r300render->base.release_vertices = r300_render_release_vertices;
r300render->base.destroy = r300_render_destroy;
return &r300render->base;
}
struct draw_stage* r300_draw_stage(struct r300_context* r300)
{
struct vbuf_render* render;
struct draw_stage* stage;
render = r300_render_create(r300);
if (!render) {
return NULL;
}
stage = draw_vbuf_stage(r300->draw, render);
if (!stage) {
render->destroy(render);
return NULL;
}
draw_set_render(r300->draw, render);
return stage;
}
/****************************************************************************
* End of SW TCL functions *
***************************************************************************/
/* This functions is used to draw a rectangle for the blitter module.
*
* If we rendered a quad, the pixels on the main diagonal
* would be computed and stored twice, which makes the clear/copy codepaths
* somewhat inefficient. Instead we use a rectangular point sprite. */
void r300_blitter_draw_rectangle(struct blitter_context *blitter,
void *vertex_elements_cso,
blitter_get_vs_func get_vs,
int x1, int y1, int x2, int y2,
float depth, unsigned num_instances,
enum blitter_attrib_type type,
const union blitter_attrib *attrib)
{
struct r300_context *r300 = r300_context(util_blitter_get_pipe(blitter));
unsigned last_sprite_coord_enable = r300->sprite_coord_enable;
unsigned width = x2 - x1;
unsigned height = y2 - y1;
unsigned vertex_size =
type == UTIL_BLITTER_ATTRIB_COLOR || !r300->draw ? 8 : 4;
unsigned dwords = 13 + vertex_size +
(type == UTIL_BLITTER_ATTRIB_TEXCOORD_XY ? 7 : 0);
static const union blitter_attrib zeros;
CS_LOCALS(r300);
/* XXX workaround for a lockup in MSAA resolve on SWTCL chipsets, this
* function most probably doesn't handle type=NONE correctly */
if ((!r300->screen->caps.has_tcl && type == UTIL_BLITTER_ATTRIB_NONE) ||
type == UTIL_BLITTER_ATTRIB_TEXCOORD_XYZW ||
num_instances > 1) {
util_blitter_draw_rectangle(blitter, vertex_elements_cso, get_vs,
x1, y1, x2, y2,
depth, num_instances, type, attrib);
return;
}
if (r300->skip_rendering)
return;
r300->context.bind_vertex_elements_state(&r300->context, vertex_elements_cso);
r300->context.bind_vs_state(&r300->context, get_vs(blitter));
if (type == UTIL_BLITTER_ATTRIB_TEXCOORD_XY)
r300->sprite_coord_enable = 1;
r300_update_derived_state(r300);
/* Mark some states we don't care about as non-dirty. */
r300->viewport_state.dirty = FALSE;
if (!r300_prepare_for_rendering(r300, PREP_EMIT_STATES, NULL, dwords, 0, 0, -1))
goto done;
DBG(r300, DBG_DRAW, "r300: draw_rectangle\n");
BEGIN_CS(dwords);
/* Set up GA. */
OUT_CS_REG(R300_GA_POINT_SIZE, (height * 6) | ((width * 6) << 16));
if (type == UTIL_BLITTER_ATTRIB_TEXCOORD_XY) {
/* Set up the GA to generate texcoords. */
OUT_CS_REG(R300_GB_ENABLE, R300_GB_POINT_STUFF_ENABLE |
(R300_GB_TEX_STR << R300_GB_TEX0_SOURCE_SHIFT));
OUT_CS_REG_SEQ(R300_GA_POINT_S0, 4);
OUT_CS_32F(attrib->texcoord.x1);
OUT_CS_32F(attrib->texcoord.y2);
OUT_CS_32F(attrib->texcoord.x2);
OUT_CS_32F(attrib->texcoord.y1);
}
/* Set up VAP controls. */
OUT_CS_REG(R300_VAP_CLIP_CNTL, R300_CLIP_DISABLE);
OUT_CS_REG(R300_VAP_VTE_CNTL, R300_VTX_XY_FMT | R300_VTX_Z_FMT);
OUT_CS_REG(R300_VAP_VTX_SIZE, vertex_size);
OUT_CS_REG_SEQ(R300_VAP_VF_MAX_VTX_INDX, 2);
OUT_CS(1);
OUT_CS(0);
/* Draw. */
OUT_CS_PKT3(R300_PACKET3_3D_DRAW_IMMD_2, vertex_size);
OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_EMBEDDED | (1 << 16) |
R300_VAP_VF_CNTL__PRIM_POINTS);
OUT_CS_32F(x1 + width * 0.5f);
OUT_CS_32F(y1 + height * 0.5f);
OUT_CS_32F(depth);
OUT_CS_32F(1);
if (vertex_size == 8) {
if (!attrib)
attrib = &zeros;
OUT_CS_TABLE(attrib->color, 4);
}
END_CS;
done:
/* Restore the state. */
r300_mark_atom_dirty(r300, &r300->rs_state);
r300_mark_atom_dirty(r300, &r300->viewport_state);
r300->sprite_coord_enable = last_sprite_coord_enable;
}
void r300_init_render_functions(struct r300_context *r300)
{
/* Set draw functions based on presence of HW TCL. */
if (r300->screen->caps.has_tcl) {
r300->context.draw_vbo = r300_draw_vbo;
} else {
r300->context.draw_vbo = r300_swtcl_draw_vbo;
}
/* Plug in the two-sided stencil reference value fallback if needed. */
if (!r300->screen->caps.is_r500)
r300_plug_in_stencil_ref_fallback(r300);
}