/*
* Copyright 2009 Corbin Simpson <MostAwesomeDude@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 "pipe/p_inlines.h"
#include "util/u_format.h"
#include "util/u_memory.h"
#include "util/u_prim.h"
#include "r300_cs.h"
#include "r300_context.h"
#include "r300_emit.h"
#include "r300_reg.h"
#include "r300_render.h"
#include "r300_state_derived.h"
/* r300_render: Vertex and index buffer primitive emission. */
#define R300_MAX_VBO_SIZE (1024 * 1024)
uint32_t r300_translate_primitive(unsigned prim)
{
switch (prim) {
case PIPE_PRIM_POINTS:
return R300_VAP_VF_CNTL__PRIM_POINTS;
case PIPE_PRIM_LINES:
return R300_VAP_VF_CNTL__PRIM_LINES;
case PIPE_PRIM_LINE_LOOP:
return R300_VAP_VF_CNTL__PRIM_LINE_LOOP;
case PIPE_PRIM_LINE_STRIP:
return R300_VAP_VF_CNTL__PRIM_LINE_STRIP;
case PIPE_PRIM_TRIANGLES:
return R300_VAP_VF_CNTL__PRIM_TRIANGLES;
case PIPE_PRIM_TRIANGLE_STRIP:
return R300_VAP_VF_CNTL__PRIM_TRIANGLE_STRIP;
case PIPE_PRIM_TRIANGLE_FAN:
return R300_VAP_VF_CNTL__PRIM_TRIANGLE_FAN;
case PIPE_PRIM_QUADS:
return R300_VAP_VF_CNTL__PRIM_QUADS;
case PIPE_PRIM_QUAD_STRIP:
return R300_VAP_VF_CNTL__PRIM_QUAD_STRIP;
case PIPE_PRIM_POLYGON:
return R300_VAP_VF_CNTL__PRIM_POLYGON;
default:
return 0;
}
}
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;
}
static boolean immd_is_good_idea(struct r300_context *r300,
unsigned count)
{
return count <= 4;
}
static void r300_emit_draw_arrays_immediate(struct r300_context *r300,
unsigned mode,
unsigned start,
unsigned count)
{
struct pipe_vertex_element* velem;
struct pipe_vertex_buffer* vbuf;
unsigned vertex_element_count = r300->vertex_element_count;
unsigned i, v, vbi, dw, elem_offset;
/* Size of the vertex, in dwords. */
unsigned vertex_size = 0;
/* Offsets of the attribute, in dwords, from the start of the vertex. */
unsigned offset[PIPE_MAX_ATTRIBS];
/* 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};
CS_LOCALS(r300);
/* Calculate the vertex size, offsets, strides etc. and map the buffers. */
for (i = 0; i < vertex_element_count; i++) {
velem = &r300->vertex_element[i];
offset[i] = velem->src_offset / 4;
size[i] = util_format_get_blocksize(velem->src_format) / 4;
vertex_size += size[i];
vbi = velem->vertex_buffer_index;
/* Map the buffer. */
if (!map[vbi]) {
vbuf = &r300->vertex_buffer[vbi];
map[vbi] = (uint32_t*)pipe_buffer_map(r300->context.screen,
vbuf->buffer,
PIPE_BUFFER_USAGE_CPU_READ);
map[vbi] += vbuf->buffer_offset / 4;
stride[vbi] = vbuf->stride / 4;
}
}
r300_emit_dirty_state(r300);
BEGIN_CS(10 + count * vertex_size);
OUT_CS_REG(R300_GA_COLOR_CONTROL,
r300_provoking_vertex_fixes(r300, mode));
OUT_CS_REG(R300_VAP_VTX_SIZE, vertex_size);
OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, 0);
OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, count - 1);
OUT_CS_PKT3(R300_PACKET3_3D_DRAW_IMMD_2, count * vertex_size);
OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_VERTEX_EMBEDDED | (count << 16) |
r300_translate_primitive(mode));
/* Emit vertices. */
for (v = 0; v < count; v++) {
for (i = 0; i < vertex_element_count; i++) {
velem = &r300->vertex_element[i];
vbi = velem->vertex_buffer_index;
elem_offset = offset[i] + stride[vbi] * (v + start);
for (dw = 0; dw < size[i]; dw++) {
OUT_CS(map[vbi][elem_offset + dw]);
}
}
}
END_CS;
/* Unmap buffers. */
for (i = 0; i < vertex_element_count; i++) {
vbi = r300->vertex_element[i].vertex_buffer_index;
if (map[vbi]) {
vbuf = &r300->vertex_buffer[vbi];
pipe_buffer_unmap(r300->context.screen, vbuf->buffer);
map[vbi] = NULL;
}
}
}
static void r300_emit_draw_arrays(struct r300_context *r300,
unsigned mode,
unsigned count)
{
CS_LOCALS(r300);
BEGIN_CS(8);
OUT_CS_REG(R300_GA_COLOR_CONTROL,
r300_provoking_vertex_fixes(r300, mode));
OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, 0);
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) |
r300_translate_primitive(mode));
END_CS;
}
static void r300_emit_draw_elements(struct r300_context *r300,
struct pipe_buffer* indexBuffer,
unsigned indexSize,
unsigned minIndex,
unsigned maxIndex,
unsigned mode,
unsigned start,
unsigned count)
{
uint32_t count_dwords;
uint32_t offset_dwords = indexSize * start / sizeof(uint32_t);
CS_LOCALS(r300);
/* XXX most of these are stupid */
assert(indexSize == 4 || indexSize == 2);
assert((start * indexSize) % 4 == 0);
assert(offset_dwords == 0);
BEGIN_CS(14);
OUT_CS_REG(R300_GA_COLOR_CONTROL,
r300_provoking_vertex_fixes(r300, mode));
OUT_CS_REG(R300_VAP_VF_MIN_VTX_INDX, minIndex);
OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, maxIndex);
OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, 0);
if (indexSize == 4) {
count_dwords = count + start;
OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
R300_VAP_VF_CNTL__INDEX_SIZE_32bit |
r300_translate_primitive(mode));
} else {
count_dwords = (count + start + 1) / 2;
OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
r300_translate_primitive(mode));
}
/* INDX_BUFFER is a truly special packet3.
* Unlike most other packet3, where the offset is after the count,
* the order is reversed, so the relocation ends up carrying the
* size of the indexbuf instead of the offset.
*
* XXX Fix offset
*/
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);
OUT_CS_RELOC(indexBuffer, count_dwords,
RADEON_GEM_DOMAIN_GTT, 0, 0);
END_CS;
}
static boolean r300_setup_vertex_buffers(struct r300_context *r300)
{
struct pipe_vertex_buffer *vbuf = r300->vertex_buffer;
struct pipe_vertex_element *velem = r300->vertex_element;
struct pipe_buffer *pbuf;
validate:
for (int i = 0; i < r300->vertex_element_count; i++) {
pbuf = vbuf[velem[i].vertex_buffer_index].buffer;
if (!r300->winsys->add_buffer(r300->winsys, pbuf,
RADEON_GEM_DOMAIN_GTT, 0)) {
r300->context.flush(&r300->context, 0, NULL);
goto validate;
}
}
if (!r300->winsys->validate(r300->winsys)) {
r300->context.flush(&r300->context, 0, NULL);
return r300->winsys->validate(r300->winsys);
}
return TRUE;
}
static void r300_shorten_ubyte_elts(struct r300_context* r300,
struct pipe_buffer** elts,
unsigned count)
{
struct pipe_screen* screen = r300->context.screen;
struct pipe_buffer* new_elts;
unsigned char *in_map;
unsigned short *out_map;
unsigned i;
new_elts = screen->buffer_create(screen, 32,
PIPE_BUFFER_USAGE_INDEX |
PIPE_BUFFER_USAGE_CPU_WRITE |
PIPE_BUFFER_USAGE_GPU_READ,
2 * count);
in_map = pipe_buffer_map(screen, *elts, PIPE_BUFFER_USAGE_CPU_READ);
out_map = pipe_buffer_map(screen, new_elts, PIPE_BUFFER_USAGE_CPU_WRITE);
for (i = 0; i < count; i++) {
*out_map = (unsigned short)*in_map;
in_map++;
out_map++;
}
pipe_buffer_unmap(screen, *elts);
pipe_buffer_unmap(screen, new_elts);
*elts = new_elts;
}
/* This is the fast-path drawing & emission for HW TCL. */
void r300_draw_range_elements(struct pipe_context* pipe,
struct pipe_buffer* indexBuffer,
unsigned indexSize,
unsigned minIndex,
unsigned maxIndex,
unsigned mode,
unsigned start,
unsigned count)
{
struct r300_context* r300 = r300_context(pipe);
struct pipe_buffer* orgIndexBuffer = indexBuffer;
if (!u_trim_pipe_prim(mode, &count)) {
return;
}
if (count > 65535) {
/* XXX: use aux/indices functions to split this into smaller
* primitives.
*/
return;
}
r300_update_derived_state(r300);
r300_emit_buffer_validate(r300);
if (!r300_setup_vertex_buffers(r300)) {
return;
}
if (indexSize == 1) {
r300_shorten_ubyte_elts(r300, &indexBuffer, count);
indexSize = 2;
}
if (!r300->winsys->add_buffer(r300->winsys, indexBuffer,
RADEON_GEM_DOMAIN_GTT, 0)) {
goto cleanup;
}
if (!r300->winsys->validate(r300->winsys)) {
goto cleanup;
}
r300_emit_dirty_state(r300);
r300_emit_aos(r300, 0);
r300_emit_draw_elements(r300, indexBuffer, indexSize, minIndex, maxIndex,
mode, start, count);
cleanup:
if (indexBuffer != orgIndexBuffer) {
pipe->screen->buffer_destroy(indexBuffer);
}
}
/* Simple helpers for context setup. Should probably be moved to util. */
void r300_draw_elements(struct pipe_context* pipe,
struct pipe_buffer* indexBuffer,
unsigned indexSize, unsigned mode,
unsigned start, unsigned count)
{
pipe->draw_range_elements(pipe, indexBuffer, indexSize, 0, ~0,
mode, start, count);
}
void r300_draw_arrays(struct pipe_context* pipe, unsigned mode,
unsigned start, unsigned count)
{
struct r300_context* r300 = r300_context(pipe);
if (!u_trim_pipe_prim(mode, &count)) {
return;
}
if (count > 65535) {
/* XXX: driver needs to handle this -- use the functions in
* aux/indices to split this into several smaller primitives.
*/
return;
}
r300_update_derived_state(r300);
r300_emit_buffer_validate(r300);
if (immd_is_good_idea(r300, count)) {
r300_emit_draw_arrays_immediate(r300, mode, start, count);
} else {
if (!r300_setup_vertex_buffers(r300)) {
return;
}
r300_emit_dirty_state(r300);
r300_emit_aos(r300, start);
r300_emit_draw_arrays(r300, mode, count);
}
}
/****************************************************************************
* 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 arrays, using Draw. */
void r300_swtcl_draw_arrays(struct pipe_context* pipe,
unsigned mode,
unsigned start,
unsigned count)
{
struct r300_context* r300 = r300_context(pipe);
int i;
if (!u_trim_pipe_prim(mode, &count)) {
return;
}
for (i = 0; i < r300->vertex_buffer_count; i++) {
void* buf = pipe_buffer_map(pipe->screen,
r300->vertex_buffer[i].buffer,
PIPE_BUFFER_USAGE_CPU_READ);
draw_set_mapped_vertex_buffer(r300->draw, i, buf);
}
draw_set_mapped_element_buffer(r300->draw, 0, NULL);
draw_set_mapped_constant_buffer(r300->draw,
PIPE_SHADER_VERTEX,
0,
r300->shader_constants[PIPE_SHADER_VERTEX].constants,
r300->shader_constants[PIPE_SHADER_VERTEX].count *
(sizeof(float) * 4));
draw_arrays(r300->draw, mode, start, count);
for (i = 0; i < r300->vertex_buffer_count; i++) {
pipe_buffer_unmap(pipe->screen, r300->vertex_buffer[i].buffer);
draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
}
}
/* SW TCL elements, using Draw. */
void r300_swtcl_draw_range_elements(struct pipe_context* pipe,
struct pipe_buffer* indexBuffer,
unsigned indexSize,
unsigned minIndex,
unsigned maxIndex,
unsigned mode,
unsigned start,
unsigned count)
{
struct r300_context* r300 = r300_context(pipe);
int i;
void* indices;
if (!u_trim_pipe_prim(mode, &count)) {
return;
}
for (i = 0; i < r300->vertex_buffer_count; i++) {
void* buf = pipe_buffer_map(pipe->screen,
r300->vertex_buffer[i].buffer,
PIPE_BUFFER_USAGE_CPU_READ);
draw_set_mapped_vertex_buffer(r300->draw, i, buf);
}
indices = pipe_buffer_map(pipe->screen, indexBuffer,
PIPE_BUFFER_USAGE_CPU_READ);
draw_set_mapped_element_buffer_range(r300->draw, indexSize,
minIndex, maxIndex, indices);
draw_set_mapped_constant_buffer(r300->draw,
PIPE_SHADER_VERTEX,
0,
r300->shader_constants[PIPE_SHADER_VERTEX].constants,
r300->shader_constants[PIPE_SHADER_VERTEX].count *
(sizeof(float) * 4));
draw_arrays(r300->draw, mode, start, count);
for (i = 0; i < r300->vertex_buffer_count; i++) {
pipe_buffer_unmap(pipe->screen, r300->vertex_buffer[i].buffer);
draw_set_mapped_vertex_buffer(r300->draw, i, NULL);
}
pipe_buffer_unmap(pipe->screen, indexBuffer);
draw_set_mapped_element_buffer_range(r300->draw, 0, start,
start + count - 1, NULL);
}
/* 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 */
struct pipe_buffer* vbo;
size_t vbo_size;
size_t vbo_offset;
size_t vbo_max_used;
void * 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;
r300_update_derived_state(r300);
return (struct vertex_info*)r300->vertex_format_state.state;
}
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 pipe_screen* screen = r300->context.screen;
size_t size = (size_t)vertex_size * (size_t)count;
if (size + r300render->vbo_offset > r300render->vbo_size)
{
pipe_buffer_reference(&r300->vbo, NULL);
r300render->vbo = pipe_buffer_create(screen,
64,
PIPE_BUFFER_USAGE_VERTEX,
R300_MAX_VBO_SIZE);
r300render->vbo_offset = 0;
r300render->vbo_size = R300_MAX_VBO_SIZE;
}
r300render->vertex_size = vertex_size;
r300->vbo = r300render->vbo;
r300->vbo_offset = r300render->vbo_offset;
return (r300render->vbo) ? TRUE : FALSE;
}
static void* r300_render_map_vertices(struct vbuf_render* render)
{
struct r300_render* r300render = r300_render(render);
struct pipe_screen* screen = r300render->r300->context.screen;
r300render->vbo_ptr = pipe_buffer_map(screen, r300render->vbo,
PIPE_BUFFER_USAGE_CPU_WRITE);
return ((uint8_t*)r300render->vbo_ptr + r300render->vbo_offset);
}
static void r300_render_unmap_vertices(struct vbuf_render* render,
ushort min,
ushort max)
{
struct r300_render* r300render = r300_render(render);
struct pipe_screen* screen = r300render->r300->context.screen;
CS_LOCALS(r300render->r300);
BEGIN_CS(2);
OUT_CS_REG(R300_VAP_VF_MAX_VTX_INDX, max);
END_CS;
r300render->vbo_max_used = MAX2(r300render->vbo_max_used,
r300render->vertex_size * (max + 1));
pipe_buffer_unmap(screen, r300render->vbo);
}
static void r300_render_release_vertices(struct vbuf_render* render)
{
struct r300_render* r300render = r300_render(render);
r300render->vbo_offset += r300render->vbo_max_used;
r300render->vbo_max_used = 0;
}
static boolean r300_render_set_primitive(struct vbuf_render* render,
unsigned prim)
{
struct r300_render* r300render = r300_render(render);
r300render->prim = prim;
r300render->hwprim = r300_translate_primitive(prim);
return TRUE;
}
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;
CS_LOCALS(r300);
r300_emit_dirty_state(r300);
DBG(r300, DBG_DRAW, "r300: Doing vbuf render, count %d\n", count);
BEGIN_CS(2);
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(struct vbuf_render* render,
const ushort* indices,
uint count)
{
struct r300_render* r300render = r300_render(render);
struct r300_context* r300 = r300render->r300;
int i;
CS_LOCALS(r300);
r300_emit_dirty_state(r300);
BEGIN_CS(2 + (count+1)/2);
OUT_CS_PKT3(R300_PACKET3_3D_DRAW_INDX_2, (count+1)/2);
OUT_CS(R300_VAP_VF_CNTL__PRIM_WALK_INDICES | (count << 16) |
r300render->hwprim);
for (i = 0; i < count-1; i += 2) {
OUT_CS(indices[i+1] << 16 | indices[i]);
}
if (count % 2) {
OUT_CS(indices[count-1]);
}
END_CS;
}
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;
/* XXX find real numbers plz */
r300render->base.max_vertex_buffer_bytes = 128 * 1024;
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 = r300_render_draw;
r300render->base.draw_arrays = r300_render_draw_arrays;
r300render->base.release_vertices = r300_render_release_vertices;
r300render->base.destroy = r300_render_destroy;
r300render->vbo = NULL;
r300render->vbo_size = 0;
r300render->vbo_offset = 0;
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;
}