/*
* Copyright © 2013 Intel Corporation
*
* 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, sublicense,
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*/
extern "C" {
#include "main/teximage.h"
#include "main/blend.h"
#include "main/fbobject.h"
#include "main/renderbuffer.h"
}
#include "glsl/ralloc.h"
#include "intel_fbo.h"
#include "brw_blorp.h"
#include "brw_context.h"
#include "brw_eu.h"
#include "brw_state.h"
#define FILE_DEBUG_FLAG DEBUG_BLORP
struct brw_blorp_const_color_prog_key
{
bool use_simd16_replicated_data;
bool pad[3];
};
/**
* Parameters for a blorp operation where the fragment shader outputs a
* constant color. This is used for both fast color clears and color
* resolves.
*/
class brw_blorp_const_color_params : public brw_blorp_params
{
public:
virtual uint32_t get_wm_prog(struct brw_context *brw,
brw_blorp_prog_data **prog_data) const;
protected:
brw_blorp_const_color_prog_key wm_prog_key;
};
class brw_blorp_clear_params : public brw_blorp_const_color_params
{
public:
brw_blorp_clear_params(struct brw_context *brw,
struct gl_framebuffer *fb,
struct gl_renderbuffer *rb,
GLubyte *color_mask,
bool partial_clear);
};
/**
* Parameters for a blorp operation that performs a "render target resolve".
* This is used to resolve pending fast clear pixels before a color buffer is
* used for texturing, ReadPixels, or scanout.
*/
class brw_blorp_rt_resolve_params : public brw_blorp_const_color_params
{
public:
brw_blorp_rt_resolve_params(struct brw_context *brw,
struct intel_mipmap_tree *mt);
};
class brw_blorp_const_color_program
{
public:
brw_blorp_const_color_program(struct brw_context *brw,
const brw_blorp_const_color_prog_key *key);
~brw_blorp_const_color_program();
const GLuint *compile(struct brw_context *brw, GLuint *program_size);
brw_blorp_prog_data prog_data;
private:
void alloc_regs();
void *mem_ctx;
struct brw_context *brw;
const brw_blorp_const_color_prog_key *key;
struct brw_compile func;
/* Thread dispatch header */
struct brw_reg R0;
/* Pixel X/Y coordinates (always in R1). */
struct brw_reg R1;
/* Register with push constants (a single vec4) */
struct brw_reg clear_rgba;
/* MRF used for render target writes */
GLuint base_mrf;
};
brw_blorp_const_color_program::brw_blorp_const_color_program(
struct brw_context *brw,
const brw_blorp_const_color_prog_key *key)
: mem_ctx(ralloc_context(NULL)),
brw(brw),
key(key),
R0(),
R1(),
clear_rgba(),
base_mrf(0)
{
brw_init_compile(brw, &func, mem_ctx);
}
brw_blorp_const_color_program::~brw_blorp_const_color_program()
{
ralloc_free(mem_ctx);
}
/**
* Determine if fast color clear supports the given clear color.
*
* Fast color clear can only clear to color values of 1.0 or 0.0. At the
* moment we only support floating point, unorm, and snorm buffers.
*/
static bool
is_color_fast_clear_compatible(struct brw_context *brw,
gl_format format,
const union gl_color_union *color)
{
if (_mesa_is_format_integer_color(format))
return false;
for (int i = 0; i < 4; i++) {
if (color->f[i] != 0.0 && color->f[i] != 1.0) {
perf_debug("Clear color unsupported by fast color clear. "
"Falling back to slow clear.\n");
return false;
}
}
return true;
}
/**
* Convert the given color to a bitfield suitable for ORing into DWORD 7 of
* SURFACE_STATE.
*/
static uint32_t
compute_fast_clear_color_bits(const union gl_color_union *color)
{
uint32_t bits = 0;
for (int i = 0; i < 4; i++) {
if (color->f[i] != 0.0)
bits |= 1 << (GEN7_SURFACE_CLEAR_COLOR_SHIFT + (3 - i));
}
return bits;
}
brw_blorp_clear_params::brw_blorp_clear_params(struct brw_context *brw,
struct gl_framebuffer *fb,
struct gl_renderbuffer *rb,
GLubyte *color_mask,
bool partial_clear)
{
struct gl_context *ctx = &brw->ctx;
struct intel_renderbuffer *irb = intel_renderbuffer(rb);
dst.set(brw, irb->mt, irb->mt_level, irb->mt_layer);
/* Override the surface format according to the context's sRGB rules. */
gl_format format = _mesa_get_render_format(ctx, irb->mt->format);
dst.brw_surfaceformat = brw->render_target_format[format];
x0 = fb->_Xmin;
x1 = fb->_Xmax;
if (rb->Name != 0) {
y0 = fb->_Ymin;
y1 = fb->_Ymax;
} else {
y0 = rb->Height - fb->_Ymax;
y1 = rb->Height - fb->_Ymin;
}
float *push_consts = (float *)&wm_push_consts;
push_consts[0] = ctx->Color.ClearColor.f[0];
push_consts[1] = ctx->Color.ClearColor.f[1];
push_consts[2] = ctx->Color.ClearColor.f[2];
push_consts[3] = ctx->Color.ClearColor.f[3];
use_wm_prog = true;
memset(&wm_prog_key, 0, sizeof(wm_prog_key));
wm_prog_key.use_simd16_replicated_data = true;
/* From the SNB PRM (Vol4_Part1):
*
* "Replicated data (Message Type = 111) is only supported when
* accessing tiled memory. Using this Message Type to access linear
* (untiled) memory is UNDEFINED."
*/
if (irb->mt->region->tiling == I915_TILING_NONE)
wm_prog_key.use_simd16_replicated_data = false;
/* Constant color writes ignore everyting in blend and color calculator
* state. This is not documented.
*/
for (int i = 0; i < 4; i++) {
if (!color_mask[i]) {
color_write_disable[i] = true;
wm_prog_key.use_simd16_replicated_data = false;
}
}
/* If we can do this as a fast color clear, do so. */
if (irb->mt->mcs_state != INTEL_MCS_STATE_NONE && !partial_clear &&
wm_prog_key.use_simd16_replicated_data &&
is_color_fast_clear_compatible(brw, format, &ctx->Color.ClearColor)) {
memset(push_consts, 0xff, 4*sizeof(float));
fast_clear_op = GEN7_FAST_CLEAR_OP_FAST_CLEAR;
/* From the Ivy Bridge PRM, Vol2 Part1 11.7 "MCS Buffer for Render
* Target(s)", beneath the "Fast Color Clear" bullet (p327):
*
* Clear pass must have a clear rectangle that must follow alignment
* rules in terms of pixels and lines as shown in the table
* below. Further, the clear-rectangle height and width must be
* multiple of the following dimensions. If the height and width of
* the render target being cleared do not meet these requirements,
* an MCS buffer can be created such that it follows the requirement
* and covers the RT.
*
* The alignment size in the table that follows is related to the
* alignment size returned by intel_get_non_msrt_mcs_alignment(), but
* with X alignment multiplied by 16 and Y alignment multiplied by 32.
*/
unsigned x_align, y_align;
intel_get_non_msrt_mcs_alignment(brw, irb->mt, &x_align, &y_align);
x_align *= 16;
y_align *= 32;
/* From BSpec: 3D-Media-GPGPU Engine > 3D Pipeline > Pixel > Pixel
* Backend > MCS Buffer for Render Target(s) [DevIVB+] > Table "Color
* Clear of Non-MultiSampled Render Target Restrictions":
*
* Clear rectangle must be aligned to two times the number of pixels in
* the table shown below due to 16x16 hashing across the slice.
*/
x0 = ROUND_DOWN_TO(x0, 2 * x_align);
y0 = ROUND_DOWN_TO(y0, 2 * y_align);
x1 = ALIGN(x1, 2 * x_align);
y1 = ALIGN(y1, 2 * y_align);
/* From the Ivy Bridge PRM, Vol2 Part1 11.7 "MCS Buffer for Render
* Target(s)", beneath the "Fast Color Clear" bullet (p327):
*
* In order to optimize the performance MCS buffer (when bound to 1X
* RT) clear similarly to MCS buffer clear for MSRT case, clear rect
* is required to be scaled by the following factors in the
* horizontal and vertical directions:
*
* The X and Y scale down factors in the table that follows are each
* equal to half the alignment value computed above.
*/
unsigned x_scaledown = x_align / 2;
unsigned y_scaledown = y_align / 2;
x0 /= x_scaledown;
y0 /= y_scaledown;
x1 /= x_scaledown;
y1 /= y_scaledown;
}
}
brw_blorp_rt_resolve_params::brw_blorp_rt_resolve_params(
struct brw_context *brw,
struct intel_mipmap_tree *mt)
{
dst.set(brw, mt, 0 /* level */, 0 /* layer */);
/* From the Ivy Bridge PRM, Vol2 Part1 11.9 "Render Target Resolve":
*
* A rectangle primitive must be scaled down by the following factors
* with respect to render target being resolved.
*
* The scaledown factors in the table that follows are related to the
* alignment size returned by intel_get_non_msrt_mcs_alignment(), but with
* X and Y alignment each divided by 2.
*/
unsigned x_align, y_align;
intel_get_non_msrt_mcs_alignment(brw, mt, &x_align, &y_align);
unsigned x_scaledown = x_align / 2;
unsigned y_scaledown = y_align / 2;
x0 = y0 = 0;
x1 = ALIGN(mt->logical_width0, x_scaledown) / x_scaledown;
y1 = ALIGN(mt->logical_height0, y_scaledown) / y_scaledown;
fast_clear_op = GEN7_FAST_CLEAR_OP_RESOLVE;
/* Note: there is no need to initialize push constants because it doesn't
* matter what data gets dispatched to the render target. However, we must
* ensure that the fragment shader delivers the data using the "replicated
* color" message.
*/
use_wm_prog = true;
memset(&wm_prog_key, 0, sizeof(wm_prog_key));
wm_prog_key.use_simd16_replicated_data = true;
}
uint32_t
brw_blorp_const_color_params::get_wm_prog(struct brw_context *brw,
brw_blorp_prog_data **prog_data)
const
{
uint32_t prog_offset = 0;
if (!brw_search_cache(&brw->cache, BRW_BLORP_CONST_COLOR_PROG,
&this->wm_prog_key, sizeof(this->wm_prog_key),
&prog_offset, prog_data)) {
brw_blorp_const_color_program prog(brw, &this->wm_prog_key);
GLuint program_size;
const GLuint *program = prog.compile(brw, &program_size);
brw_upload_cache(&brw->cache, BRW_BLORP_CONST_COLOR_PROG,
&this->wm_prog_key, sizeof(this->wm_prog_key),
program, program_size,
&prog.prog_data, sizeof(prog.prog_data),
&prog_offset, prog_data);
}
return prog_offset;
}
void
brw_blorp_const_color_program::alloc_regs()
{
int reg = 0;
this->R0 = retype(brw_vec8_grf(reg++, 0), BRW_REGISTER_TYPE_UW);
this->R1 = retype(brw_vec8_grf(reg++, 0), BRW_REGISTER_TYPE_UW);
prog_data.first_curbe_grf = reg;
clear_rgba = retype(brw_vec4_grf(reg++, 0), BRW_REGISTER_TYPE_F);
reg += BRW_BLORP_NUM_PUSH_CONST_REGS;
/* Make sure we didn't run out of registers */
assert(reg <= GEN7_MRF_HACK_START);
this->base_mrf = 2;
}
const GLuint *
brw_blorp_const_color_program::compile(struct brw_context *brw,
GLuint *program_size)
{
/* Set up prog_data */
memset(&prog_data, 0, sizeof(prog_data));
prog_data.persample_msaa_dispatch = false;
alloc_regs();
brw_set_compression_control(&func, BRW_COMPRESSION_NONE);
struct brw_reg mrf_rt_write =
retype(vec16(brw_message_reg(base_mrf)), BRW_REGISTER_TYPE_F);
uint32_t mlen, msg_type;
if (key->use_simd16_replicated_data) {
/* The message payload is a single register with the low 4 floats/ints
* filled with the constant clear color.
*/
brw_set_mask_control(&func, BRW_MASK_DISABLE);
brw_MOV(&func, vec4(brw_message_reg(base_mrf)), clear_rgba);
brw_set_mask_control(&func, BRW_MASK_ENABLE);
msg_type = BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD16_SINGLE_SOURCE_REPLICATED;
mlen = 1;
} else {
for (int i = 0; i < 4; i++) {
/* The message payload is pairs of registers for 16 pixels each of r,
* g, b, and a.
*/
brw_set_compression_control(&func, BRW_COMPRESSION_COMPRESSED);
brw_MOV(&func,
brw_message_reg(base_mrf + i * 2),
brw_vec1_grf(clear_rgba.nr, i));
brw_set_compression_control(&func, BRW_COMPRESSION_NONE);
}
msg_type = BRW_DATAPORT_RENDER_TARGET_WRITE_SIMD16_SINGLE_SOURCE;
mlen = 8;
}
/* Now write to the render target and terminate the thread */
brw_fb_WRITE(&func,
16 /* dispatch_width */,
base_mrf /* msg_reg_nr */,
mrf_rt_write /* src0 */,
msg_type,
BRW_BLORP_RENDERBUFFER_BINDING_TABLE_INDEX,
mlen,
0 /* response_length */,
true /* eot */,
false /* header present */);
if (unlikely(INTEL_DEBUG & DEBUG_BLORP)) {
printf("Native code for BLORP clear:\n");
brw_dump_compile(&func, stdout, 0, func.next_insn_offset);
printf("\n");
}
return brw_get_program(&func, program_size);
}
extern "C" {
bool
brw_blorp_clear_color(struct brw_context *brw, struct gl_framebuffer *fb,
bool partial_clear)
{
struct gl_context *ctx = &brw->ctx;
/* The constant color clear code doesn't work for multisampled surfaces, so
* we need to support falling back to other clear mechanisms.
* Unfortunately, our clear code is based on a bitmask that doesn't
* distinguish individual color attachments, so we walk the attachments to
* see if any require fallback, and fall back for all if any of them need
* to.
*/
for (unsigned buf = 0; buf < ctx->DrawBuffer->_NumColorDrawBuffers; buf++) {
struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[buf];
struct intel_renderbuffer *irb = intel_renderbuffer(rb);
if (irb && irb->mt->msaa_layout != INTEL_MSAA_LAYOUT_NONE)
return false;
}
for (unsigned buf = 0; buf < ctx->DrawBuffer->_NumColorDrawBuffers; buf++) {
struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[buf];
struct intel_renderbuffer *irb = intel_renderbuffer(rb);
/* If this is an ES2 context or GL_ARB_ES2_compatibility is supported,
* the framebuffer can be complete with some attachments missing. In
* this case the _ColorDrawBuffers pointer will be NULL.
*/
if (rb == NULL)
continue;
brw_blorp_clear_params params(brw, fb, rb, ctx->Color.ColorMask[buf],
partial_clear);
bool is_fast_clear =
(params.fast_clear_op == GEN7_FAST_CLEAR_OP_FAST_CLEAR);
if (is_fast_clear) {
/* Record the clear color in the miptree so that it will be
* programmed in SURFACE_STATE by later rendering and resolve
* operations.
*/
uint32_t new_color_value =
compute_fast_clear_color_bits(&ctx->Color.ClearColor);
if (irb->mt->fast_clear_color_value != new_color_value) {
irb->mt->fast_clear_color_value = new_color_value;
brw->state.dirty.brw |= BRW_NEW_SURFACES;
}
/* If the buffer is already in INTEL_MCS_STATE_CLEAR, the clear is
* redundant and can be skipped.
*/
if (irb->mt->mcs_state == INTEL_MCS_STATE_CLEAR)
continue;
/* If the MCS buffer hasn't been allocated yet, we need to allocate
* it now.
*/
if (!irb->mt->mcs_mt) {
if (!intel_miptree_alloc_non_msrt_mcs(brw, irb->mt)) {
/* MCS allocation failed--probably this will only happen in
* out-of-memory conditions. But in any case, try to recover
* by falling back to a non-blorp clear technique.
*/
return false;
}
brw->state.dirty.brw |= BRW_NEW_SURFACES;
}
}
DBG("%s to mt %p level %d layer %d\n", __FUNCTION__,
irb->mt, irb->mt_level, irb->mt_layer);
brw_blorp_exec(brw, ¶ms);
if (is_fast_clear) {
/* Now that the fast clear has occurred, put the buffer in
* INTEL_MCS_STATE_CLEAR so that we won't waste time doing redundant
* clears.
*/
irb->mt->mcs_state = INTEL_MCS_STATE_CLEAR;
}
}
return true;
}
void
brw_blorp_resolve_color(struct brw_context *brw, struct intel_mipmap_tree *mt)
{
DBG("%s to mt %p\n", __FUNCTION__, mt);
brw_blorp_rt_resolve_params params(brw, mt);
brw_blorp_exec(brw, ¶ms);
mt->mcs_state = INTEL_MCS_STATE_RESOLVED;
}
} /* extern "C" */