/**************************************************************************
*
* Copyright 2003 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 <sys/errno.h>
#include "main/glheader.h"
#include "main/context.h"
#include "main/condrender.h"
#include "main/samplerobj.h"
#include "main/state.h"
#include "main/enums.h"
#include "main/macros.h"
#include "main/transformfeedback.h"
#include "tnl/tnl.h"
#include "vbo/vbo_context.h"
#include "swrast/swrast.h"
#include "swrast_setup/swrast_setup.h"
#include "drivers/common/meta.h"
#include "brw_blorp.h"
#include "brw_draw.h"
#include "brw_defines.h"
#include "brw_context.h"
#include "brw_state.h"
#include "intel_batchbuffer.h"
#include "intel_fbo.h"
#include "intel_mipmap_tree.h"
#include "intel_regions.h"
#define FILE_DEBUG_FLAG DEBUG_PRIMS
static GLuint prim_to_hw_prim[GL_POLYGON+1] = {
_3DPRIM_POINTLIST,
_3DPRIM_LINELIST,
_3DPRIM_LINELOOP,
_3DPRIM_LINESTRIP,
_3DPRIM_TRILIST,
_3DPRIM_TRISTRIP,
_3DPRIM_TRIFAN,
_3DPRIM_QUADLIST,
_3DPRIM_QUADSTRIP,
_3DPRIM_POLYGON
};
static const GLenum reduced_prim[GL_POLYGON+1] = {
GL_POINTS,
GL_LINES,
GL_LINES,
GL_LINES,
GL_TRIANGLES,
GL_TRIANGLES,
GL_TRIANGLES,
GL_TRIANGLES,
GL_TRIANGLES,
GL_TRIANGLES
};
/* When the primitive changes, set a state bit and re-validate. Not
* the nicest and would rather deal with this by having all the
* programs be immune to the active primitive (ie. cope with all
* possibilities). That may not be realistic however.
*/
static void brw_set_prim(struct brw_context *brw,
const struct _mesa_prim *prim)
{
struct gl_context *ctx = &brw->ctx;
uint32_t hw_prim = prim_to_hw_prim[prim->mode];
DBG("PRIM: %s\n", _mesa_lookup_enum_by_nr(prim->mode));
/* Slight optimization to avoid the GS program when not needed:
*/
if (prim->mode == GL_QUAD_STRIP &&
ctx->Light.ShadeModel != GL_FLAT &&
ctx->Polygon.FrontMode == GL_FILL &&
ctx->Polygon.BackMode == GL_FILL)
hw_prim = _3DPRIM_TRISTRIP;
if (prim->mode == GL_QUADS && prim->count == 4 &&
ctx->Light.ShadeModel != GL_FLAT &&
ctx->Polygon.FrontMode == GL_FILL &&
ctx->Polygon.BackMode == GL_FILL) {
hw_prim = _3DPRIM_TRIFAN;
}
if (hw_prim != brw->primitive) {
brw->primitive = hw_prim;
brw->state.dirty.brw |= BRW_NEW_PRIMITIVE;
if (reduced_prim[prim->mode] != brw->reduced_primitive) {
brw->reduced_primitive = reduced_prim[prim->mode];
brw->state.dirty.brw |= BRW_NEW_REDUCED_PRIMITIVE;
}
}
}
static void gen6_set_prim(struct brw_context *brw,
const struct _mesa_prim *prim)
{
uint32_t hw_prim;
DBG("PRIM: %s\n", _mesa_lookup_enum_by_nr(prim->mode));
hw_prim = prim_to_hw_prim[prim->mode];
if (hw_prim != brw->primitive) {
brw->primitive = hw_prim;
brw->state.dirty.brw |= BRW_NEW_PRIMITIVE;
}
}
/**
* The hardware is capable of removing dangling vertices on its own; however,
* prior to Gen6, we sometimes convert quads into trifans (and quad strips
* into tristrips), since pre-Gen6 hardware requires a GS to render quads.
* This function manually trims dangling vertices from a draw call involving
* quads so that those dangling vertices won't get drawn when we convert to
* trifans/tristrips.
*/
static GLuint trim(GLenum prim, GLuint length)
{
if (prim == GL_QUAD_STRIP)
return length > 3 ? (length - length % 2) : 0;
else if (prim == GL_QUADS)
return length - length % 4;
else
return length;
}
static void brw_emit_prim(struct brw_context *brw,
const struct _mesa_prim *prim,
uint32_t hw_prim)
{
int verts_per_instance;
int vertex_access_type;
int start_vertex_location;
int base_vertex_location;
DBG("PRIM: %s %d %d\n", _mesa_lookup_enum_by_nr(prim->mode),
prim->start, prim->count);
start_vertex_location = prim->start;
base_vertex_location = prim->basevertex;
if (prim->indexed) {
vertex_access_type = GEN4_3DPRIM_VERTEXBUFFER_ACCESS_RANDOM;
start_vertex_location += brw->ib.start_vertex_offset;
base_vertex_location += brw->vb.start_vertex_bias;
} else {
vertex_access_type = GEN4_3DPRIM_VERTEXBUFFER_ACCESS_SEQUENTIAL;
start_vertex_location += brw->vb.start_vertex_bias;
}
/* We only need to trim the primitive count on pre-Gen6. */
if (brw->gen < 6)
verts_per_instance = trim(prim->mode, prim->count);
else
verts_per_instance = prim->count;
/* If nothing to emit, just return. */
if (verts_per_instance == 0)
return;
/* If we're set to always flush, do it before and after the primitive emit.
* We want to catch both missed flushes that hurt instruction/state cache
* and missed flushes of the render cache as it heads to other parts of
* the besides the draw code.
*/
if (brw->always_flush_cache) {
intel_batchbuffer_emit_mi_flush(brw);
}
BEGIN_BATCH(6);
OUT_BATCH(CMD_3D_PRIM << 16 | (6 - 2) |
hw_prim << GEN4_3DPRIM_TOPOLOGY_TYPE_SHIFT |
vertex_access_type);
OUT_BATCH(verts_per_instance);
OUT_BATCH(start_vertex_location);
OUT_BATCH(prim->num_instances);
OUT_BATCH(prim->base_instance);
OUT_BATCH(base_vertex_location);
ADVANCE_BATCH();
brw->batch.need_workaround_flush = true;
if (brw->always_flush_cache) {
intel_batchbuffer_emit_mi_flush(brw);
}
}
static void gen7_emit_prim(struct brw_context *brw,
const struct _mesa_prim *prim,
uint32_t hw_prim)
{
int verts_per_instance;
int vertex_access_type;
int start_vertex_location;
int base_vertex_location;
DBG("PRIM: %s %d %d\n", _mesa_lookup_enum_by_nr(prim->mode),
prim->start, prim->count);
start_vertex_location = prim->start;
base_vertex_location = prim->basevertex;
if (prim->indexed) {
vertex_access_type = GEN7_3DPRIM_VERTEXBUFFER_ACCESS_RANDOM;
start_vertex_location += brw->ib.start_vertex_offset;
base_vertex_location += brw->vb.start_vertex_bias;
} else {
vertex_access_type = GEN7_3DPRIM_VERTEXBUFFER_ACCESS_SEQUENTIAL;
start_vertex_location += brw->vb.start_vertex_bias;
}
verts_per_instance = prim->count;
/* If nothing to emit, just return. */
if (verts_per_instance == 0)
return;
/* If we're set to always flush, do it before and after the primitive emit.
* We want to catch both missed flushes that hurt instruction/state cache
* and missed flushes of the render cache as it heads to other parts of
* the besides the draw code.
*/
if (brw->always_flush_cache) {
intel_batchbuffer_emit_mi_flush(brw);
}
BEGIN_BATCH(7);
OUT_BATCH(CMD_3D_PRIM << 16 | (7 - 2));
OUT_BATCH(hw_prim | vertex_access_type);
OUT_BATCH(verts_per_instance);
OUT_BATCH(start_vertex_location);
OUT_BATCH(prim->num_instances);
OUT_BATCH(prim->base_instance);
OUT_BATCH(base_vertex_location);
ADVANCE_BATCH();
if (brw->always_flush_cache) {
intel_batchbuffer_emit_mi_flush(brw);
}
}
static void brw_merge_inputs( struct brw_context *brw,
const struct gl_client_array *arrays[])
{
GLuint i;
for (i = 0; i < brw->vb.nr_buffers; i++) {
drm_intel_bo_unreference(brw->vb.buffers[i].bo);
brw->vb.buffers[i].bo = NULL;
}
brw->vb.nr_buffers = 0;
for (i = 0; i < VERT_ATTRIB_MAX; i++) {
brw->vb.inputs[i].buffer = -1;
brw->vb.inputs[i].glarray = arrays[i];
brw->vb.inputs[i].attrib = (gl_vert_attrib) i;
}
}
/*
* \brief Resolve buffers before drawing.
*
* Resolve the depth buffer's HiZ buffer and resolve the depth buffer of each
* enabled depth texture.
*
* (In the future, this will also perform MSAA resolves).
*/
static void
brw_predraw_resolve_buffers(struct brw_context *brw)
{
struct gl_context *ctx = &brw->ctx;
struct intel_renderbuffer *depth_irb;
struct intel_texture_object *tex_obj;
/* Resolve the depth buffer's HiZ buffer. */
depth_irb = intel_get_renderbuffer(ctx->DrawBuffer, BUFFER_DEPTH);
if (depth_irb)
intel_renderbuffer_resolve_hiz(brw, depth_irb);
/* Resolve depth buffer of each enabled depth texture, and color buffer of
* each fast-clear-enabled color texture.
*/
for (int i = 0; i < BRW_MAX_TEX_UNIT; i++) {
if (!ctx->Texture.Unit[i]._ReallyEnabled)
continue;
tex_obj = intel_texture_object(ctx->Texture.Unit[i]._Current);
if (!tex_obj || !tex_obj->mt)
continue;
intel_miptree_all_slices_resolve_depth(brw, tex_obj->mt);
intel_miptree_resolve_color(brw, tex_obj->mt);
}
}
/**
* \brief Call this after drawing to mark which buffers need resolving
*
* If the depth buffer was written to and if it has an accompanying HiZ
* buffer, then mark that it needs a depth resolve.
*
* If the color buffer is a multisample window system buffer, then
* mark that it needs a downsample.
*/
static void brw_postdraw_set_buffers_need_resolve(struct brw_context *brw)
{
struct gl_context *ctx = &brw->ctx;
struct gl_framebuffer *fb = ctx->DrawBuffer;
struct intel_renderbuffer *front_irb = NULL;
struct intel_renderbuffer *back_irb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
struct intel_renderbuffer *depth_irb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
if (brw->is_front_buffer_rendering)
front_irb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
if (front_irb)
intel_renderbuffer_set_needs_downsample(front_irb);
if (back_irb)
intel_renderbuffer_set_needs_downsample(back_irb);
if (depth_irb && ctx->Depth.Mask)
intel_renderbuffer_set_needs_depth_resolve(depth_irb);
}
/* May fail if out of video memory for texture or vbo upload, or on
* fallback conditions.
*/
static bool brw_try_draw_prims( struct gl_context *ctx,
const struct gl_client_array *arrays[],
const struct _mesa_prim *prim,
GLuint nr_prims,
const struct _mesa_index_buffer *ib,
GLuint min_index,
GLuint max_index )
{
struct brw_context *brw = brw_context(ctx);
bool retval = true;
GLuint i;
bool fail_next = false;
if (ctx->NewState)
_mesa_update_state( ctx );
/* We have to validate the textures *before* checking for fallbacks;
* otherwise, the software fallback won't be able to rely on the
* texture state, the firstLevel and lastLevel fields won't be
* set in the intel texture object (they'll both be 0), and the
* software fallback will segfault if it attempts to access any
* texture level other than level 0.
*/
brw_validate_textures( brw );
intel_prepare_render(brw);
/* This workaround has to happen outside of brw_upload_state() because it
* may flush the batchbuffer for a blit, affecting the state flags.
*/
brw_workaround_depthstencil_alignment(brw, 0);
/* Resolves must occur after updating renderbuffers, updating context state,
* and finalizing textures but before setting up any hardware state for
* this draw call.
*/
brw_predraw_resolve_buffers(brw);
/* Bind all inputs, derive varying and size information:
*/
brw_merge_inputs( brw, arrays );
brw->ib.ib = ib;
brw->state.dirty.brw |= BRW_NEW_INDICES;
brw->vb.min_index = min_index;
brw->vb.max_index = max_index;
brw->state.dirty.brw |= BRW_NEW_VERTICES;
for (i = 0; i < nr_prims; i++) {
int estimated_max_prim_size;
estimated_max_prim_size = 512; /* batchbuffer commands */
estimated_max_prim_size += (BRW_MAX_TEX_UNIT *
(sizeof(struct brw_sampler_state) +
sizeof(struct gen5_sampler_default_color)));
estimated_max_prim_size += 1024; /* gen6 VS push constants */
estimated_max_prim_size += 1024; /* gen6 WM push constants */
estimated_max_prim_size += 512; /* misc. pad */
/* Flush the batch if it's approaching full, so that we don't wrap while
* we've got validated state that needs to be in the same batch as the
* primitives.
*/
intel_batchbuffer_require_space(brw, estimated_max_prim_size, false);
intel_batchbuffer_save_state(brw);
if (brw->num_instances != prim->num_instances) {
brw->num_instances = prim->num_instances;
brw->state.dirty.brw |= BRW_NEW_VERTICES;
}
if (brw->basevertex != prim->basevertex) {
brw->basevertex = prim->basevertex;
brw->state.dirty.brw |= BRW_NEW_VERTICES;
}
if (brw->gen < 6)
brw_set_prim(brw, &prim[i]);
else
gen6_set_prim(brw, &prim[i]);
retry:
/* Note that before the loop, brw->state.dirty.brw was set to != 0, and
* that the state updated in the loop outside of this block is that in
* *_set_prim or intel_batchbuffer_flush(), which only impacts
* brw->state.dirty.brw.
*/
if (brw->state.dirty.brw) {
brw->no_batch_wrap = true;
brw_upload_state(brw);
}
if (brw->gen >= 7)
gen7_emit_prim(brw, &prim[i], brw->primitive);
else
brw_emit_prim(brw, &prim[i], brw->primitive);
brw->no_batch_wrap = false;
if (dri_bufmgr_check_aperture_space(&brw->batch.bo, 1)) {
if (!fail_next) {
intel_batchbuffer_reset_to_saved(brw);
intel_batchbuffer_flush(brw);
fail_next = true;
goto retry;
} else {
if (intel_batchbuffer_flush(brw) == -ENOSPC) {
static bool warned = false;
if (!warned) {
fprintf(stderr
, "i965: Single primitive emit exceeded" "available aperture space\n");
warned = true;
}
retval = false;
}
}
}
}
if (brw->always_flush_batch)
intel_batchbuffer_flush(brw);
brw_state_cache_check_size(brw);
brw_postdraw_set_buffers_need_resolve(brw);
return retval;
}
void brw_draw_prims( struct gl_context *ctx,
const struct _mesa_prim *prim,
GLuint nr_prims,
const struct _mesa_index_buffer *ib,
GLboolean index_bounds_valid,
GLuint min_index,
GLuint max_index,
struct gl_transform_feedback_object *tfb_vertcount )
{
struct brw_context *brw = brw_context(ctx);
const struct gl_client_array **arrays = ctx->Array._DrawArrays;
if (!_mesa_check_conditional_render(ctx))
return;
/* Handle primitive restart if needed */
if (brw_handle_primitive_restart(ctx, prim, nr_prims, ib)) {
/* The draw was handled, so we can exit now */
return;
}
/* If we're going to have to upload any of the user's vertex arrays, then
* get the minimum and maximum of their index buffer so we know what range
* to upload.
*/
if (!vbo_all_varyings_in_vbos(arrays) && !index_bounds_valid)
vbo_get_minmax_indices(ctx, prim, ib, &min_index, &max_index, nr_prims);
/* Do GL_SELECT and GL_FEEDBACK rendering using swrast, even though it
* won't support all the extensions we support.
*/
if (ctx->RenderMode != GL_RENDER) {
perf_debug("%s render mode not supported in hardware\n",
_mesa_lookup_enum_by_nr(ctx->RenderMode));
_swsetup_Wakeup(ctx);
_tnl_wakeup(ctx);
_tnl_draw_prims(ctx, arrays, prim, nr_prims, ib, min_index, max_index);
return;
}
/* Try drawing with the hardware, but don't do anything else if we can't
* manage it. swrast doesn't support our featureset, so we can't fall back
* to it.
*/
brw_try_draw_prims(ctx, arrays, prim, nr_prims, ib, min_index, max_index);
}
void brw_draw_init( struct brw_context *brw )
{
struct gl_context *ctx = &brw->ctx;
struct vbo_context *vbo = vbo_context(ctx);
int i;
/* Register our drawing function:
*/
vbo->draw_prims = brw_draw_prims;
for (i = 0; i < VERT_ATTRIB_MAX; i++)
brw->vb.inputs[i].buffer = -1;
brw->vb.nr_buffers = 0;
brw->vb.nr_enabled = 0;
}
void brw_draw_destroy( struct brw_context *brw )
{
int i;
for (i = 0; i < brw->vb.nr_buffers; i++) {
drm_intel_bo_unreference(brw->vb.buffers[i].bo);
brw->vb.buffers[i].bo = NULL;
}
brw->vb.nr_buffers = 0;
for (i = 0; i < brw->vb.nr_enabled; i++) {
brw->vb.enabled[i]->buffer = -1;
}
brw->vb.nr_enabled = 0;
drm_intel_bo_unreference(brw->ib.bo);
brw->ib.bo = NULL;
}