static void
haswell_upload_cut_index(struct brw_context *brw)
{
struct gl_context *ctx = &brw->ctx;
/* Don't trigger on Ivybridge */
if (brw->gen < 8 && !brw->is_haswell)
return;
const unsigned cut_index_setting =
ctx->Array._PrimitiveRestart ? HSW_CUT_INDEX_ENABLE : 0;
/* BRW_NEW_INDEX_BUFFER */
unsigned cut_index;
if (brw->ib.ib) {
cut_index = _mesa_primitive_restart_index(ctx, brw->ib.type);
} else {
/* There's no index buffer, but primitive restart may still apply
* to glDrawArrays and such. FIXED_INDEX mode only applies to drawing
* operations that use an index buffer, so we can ignore it and use
* the GL restart index directly.
*/
cut_index = ctx->Array.RestartIndex;
}
BEGIN_BATCH(2);
OUT_BATCH(_3DSTATE_VF << 16 | cut_index_setting | (2 - 2));
OUT_BATCH(cut_index);
ADVANCE_BATCH();
}
/**
* Set the restart index.
*/
static void
setup_primitive_restart(struct gl_context *ctx,
const struct _mesa_index_buffer *ib,
struct pipe_draw_info *info)
{
if (ctx->Array._PrimitiveRestart) {
info->restart_index = _mesa_primitive_restart_index(ctx, ib->type);
/* Enable primitive restart only when the restart index can have an
* effect. This is required for correctness in radeonsi VI support.
* Other hardware may also benefit from taking a faster, non-restart path
* when possible.
*/
if ((ib->type == GL_UNSIGNED_INT) ||
(ib->type == GL_UNSIGNED_SHORT && info->restart_index <= 0xffff) ||
(ib->type == GL_UNSIGNED_BYTE && info->restart_index <= 0xff))
info->primitive_restart = true;
}
}
/**
* Handle primitive restart in software.
*
* This function breaks up calls into the driver so primitive restart
* support is not required in the driver.
*/
void
vbo_sw_primitive_restart(struct gl_context *ctx,
const struct _mesa_prim *prims,
GLuint nr_prims,
const struct _mesa_index_buffer *ib,
struct gl_buffer_object *indirect)
{
GLuint prim_num;
struct _mesa_prim new_prim;
struct _mesa_index_buffer new_ib;
struct sub_primitive *sub_prims;
struct sub_primitive *sub_prim;
GLuint num_sub_prims;
GLuint sub_prim_num;
GLuint end_index;
GLuint sub_end_index;
GLuint restart_index = _mesa_primitive_restart_index(ctx, ib->index_size);
struct _mesa_prim temp_prim;
struct vbo_context *vbo = vbo_context(ctx);
vbo_draw_func draw_prims_func = vbo->draw_prims;
GLboolean map_ib = ib->obj->Name && !ib->obj->Mappings[MAP_INTERNAL].Pointer;
void *ptr;
/* If there is an indirect buffer, map it and extract the draw params */
if (indirect && prims[0].is_indirect) {
const uint32_t *indirect_params;
if (!ctx->Driver.MapBufferRange(ctx, 0, indirect->Size, GL_MAP_READ_BIT,
indirect, MAP_INTERNAL)) {
/* something went wrong with mapping, give up */
_mesa_error(ctx, GL_OUT_OF_MEMORY,
"failed to map indirect buffer for sw primitive restart");
return;
}
assert(nr_prims == 1);
new_prim = prims[0];
indirect_params = (const uint32_t *)
ADD_POINTERS(indirect->Mappings[MAP_INTERNAL].Pointer,
new_prim.indirect_offset);
new_prim.is_indirect = 0;
new_prim.count = indirect_params[0];
new_prim.num_instances = indirect_params[1];
new_prim.start = indirect_params[2];
new_prim.basevertex = indirect_params[3];
new_prim.base_instance = indirect_params[4];
new_ib = *ib;
new_ib.count = new_prim.count;
prims = &new_prim;
ib = &new_ib;
ctx->Driver.UnmapBuffer(ctx, indirect, MAP_INTERNAL);
}
/* Find the sub-primitives. These are regions in the index buffer which
* are split based on the primitive restart index value.
*/
if (map_ib) {
ctx->Driver.MapBufferRange(ctx, 0, ib->obj->Size, GL_MAP_READ_BIT,
ib->obj, MAP_INTERNAL);
}
ptr = ADD_POINTERS(ib->obj->Mappings[MAP_INTERNAL].Pointer, ib->ptr);
sub_prims = find_sub_primitives(ptr, ib->index_size,
0, ib->count, restart_index,
&num_sub_prims);
if (map_ib) {
ctx->Driver.UnmapBuffer(ctx, ib->obj, MAP_INTERNAL);
}
/* Loop over the primitives, and use the located sub-primitives to draw
* each primitive with a break to implement each primitive restart.
*/
for (prim_num = 0; prim_num < nr_prims; prim_num++) {
end_index = prims[prim_num].start + prims[prim_num].count;
memcpy(&temp_prim, &prims[prim_num], sizeof (temp_prim));
/* Loop over the sub-primitives drawing sub-ranges of the primitive. */
for (sub_prim_num = 0; sub_prim_num < num_sub_prims; sub_prim_num++) {
sub_prim = &sub_prims[sub_prim_num];
sub_end_index = sub_prim->start + sub_prim->count;
if (prims[prim_num].start <= sub_prim->start) {
temp_prim.start = MAX2(prims[prim_num].start, sub_prim->start);
temp_prim.count = MIN2(sub_end_index, end_index) - temp_prim.start;
if ((temp_prim.start == sub_prim->start) &&
(temp_prim.count == sub_prim->count)) {
draw_prims_func(ctx, &temp_prim, 1, ib,
GL_TRUE, sub_prim->min_index, sub_prim->max_index,
NULL, 0, NULL);
} else {
draw_prims_func(ctx, &temp_prim, 1, ib,
GL_FALSE, -1, -1,
NULL, 0, NULL);
}
}
if (sub_end_index >= end_index) {
break;
}
}
}
free(sub_prims);
}
/**
* Compute min and max elements by scanning the index buffer for
* glDraw[Range]Elements() calls.
* If primitive restart is enabled, we need to ignore restart
* indexes when computing min/max.
*/
static void
vbo_get_minmax_index(struct gl_context *ctx,
const struct _mesa_prim *prim,
const struct _mesa_index_buffer *ib,
GLuint *min_index, GLuint *max_index,
const GLuint count)
{
const GLboolean restart = ctx->Array._PrimitiveRestart;
const GLuint restartIndex = _mesa_primitive_restart_index(ctx, ib->type);
const int index_size = vbo_sizeof_ib_type(ib->type);
const char *indices;
GLuint i;
indices = (char *) ib->ptr + prim->start * index_size;
if (_mesa_is_bufferobj(ib->obj)) {
GLsizeiptr size = MIN2(count * index_size, ib->obj->Size);
indices = ctx->Driver.MapBufferRange(ctx, (GLintptr) indices, size,
GL_MAP_READ_BIT, ib->obj);
}
switch (ib->type) {
case GL_UNSIGNED_INT: {
const GLuint *ui_indices = (const GLuint *)indices;
GLuint max_ui = 0;
GLuint min_ui = ~0U;
if (restart) {
for (i = 0; i < count; i++) {
if (ui_indices[i] != restartIndex) {
if (ui_indices[i] > max_ui) max_ui = ui_indices[i];
if (ui_indices[i] < min_ui) min_ui = ui_indices[i];
}
}
}
else {
for (i = 0; i < count; i++) {
if (ui_indices[i] > max_ui) max_ui = ui_indices[i];
if (ui_indices[i] < min_ui) min_ui = ui_indices[i];
}
}
*min_index = min_ui;
*max_index = max_ui;
break;
}
case GL_UNSIGNED_SHORT: {
const GLushort *us_indices = (const GLushort *)indices;
GLuint max_us = 0;
GLuint min_us = ~0U;
if (restart) {
for (i = 0; i < count; i++) {
if (us_indices[i] != restartIndex) {
if (us_indices[i] > max_us) max_us = us_indices[i];
if (us_indices[i] < min_us) min_us = us_indices[i];
}
}
}
else {
for (i = 0; i < count; i++) {
if (us_indices[i] > max_us) max_us = us_indices[i];
if (us_indices[i] < min_us) min_us = us_indices[i];
}
}
*min_index = min_us;
*max_index = max_us;
break;
}
case GL_UNSIGNED_BYTE: {
const GLubyte *ub_indices = (const GLubyte *)indices;
GLuint max_ub = 0;
GLuint min_ub = ~0U;
if (restart) {
for (i = 0; i < count; i++) {
if (ub_indices[i] != restartIndex) {
if (ub_indices[i] > max_ub) max_ub = ub_indices[i];
if (ub_indices[i] < min_ub) min_ub = ub_indices[i];
}
}
}
else {
for (i = 0; i < count; i++) {
if (ub_indices[i] > max_ub) max_ub = ub_indices[i];
if (ub_indices[i] < min_ub) min_ub = ub_indices[i];
}
}
*min_index = min_ub;
*max_index = max_ub;
break;
}
default:
assert(0);
break;
}
if (_mesa_is_bufferobj(ib->obj)) {
ctx->Driver.UnmapBuffer(ctx, ib->obj);
}
}
/**
* Compute min and max elements by scanning the index buffer for
* glDraw[Range]Elements() calls.
* If primitive restart is enabled, we need to ignore restart
* indexes when computing min/max.
*/
static void
vbo_get_minmax_index(struct gl_context *ctx,
const struct _mesa_prim *prim,
const struct _mesa_index_buffer *ib,
GLuint *min_index, GLuint *max_index,
const GLuint count)
{
const GLboolean restart = ctx->Array._PrimitiveRestart;
const GLuint restartIndex = _mesa_primitive_restart_index(ctx, ib->type);
const int index_size = vbo_sizeof_ib_type(ib->type);
const char *indices;
GLuint i;
indices = (char *) ib->ptr + prim->start * index_size;
if (_mesa_is_bufferobj(ib->obj)) {
GLsizeiptr size = MIN2(count * index_size, ib->obj->Size);
if (vbo_get_minmax_cached(ib->obj, ib->type, (GLintptr) indices, count,
min_index, max_index))
return;
indices = ctx->Driver.MapBufferRange(ctx, (GLintptr) indices, size,
GL_MAP_READ_BIT, ib->obj,
MAP_INTERNAL);
}
switch (ib->type) {
case GL_UNSIGNED_INT: {
const GLuint *ui_indices = (const GLuint *)indices;
GLuint max_ui = 0;
GLuint min_ui = ~0U;
if (restart) {
for (i = 0; i < count; i++) {
if (ui_indices[i] != restartIndex) {
if (ui_indices[i] > max_ui) max_ui = ui_indices[i];
if (ui_indices[i] < min_ui) min_ui = ui_indices[i];
}
}
}
else {
#if defined(USE_SSE41)
if (cpu_has_sse4_1) {
_mesa_uint_array_min_max(ui_indices, &min_ui, &max_ui, count);
}
else
#endif
for (i = 0; i < count; i++) {
if (ui_indices[i] > max_ui) max_ui = ui_indices[i];
if (ui_indices[i] < min_ui) min_ui = ui_indices[i];
}
}
*min_index = min_ui;
*max_index = max_ui;
break;
}
case GL_UNSIGNED_SHORT: {
const GLushort *us_indices = (const GLushort *)indices;
GLuint max_us = 0;
GLuint min_us = ~0U;
if (restart) {
for (i = 0; i < count; i++) {
if (us_indices[i] != restartIndex) {
if (us_indices[i] > max_us) max_us = us_indices[i];
if (us_indices[i] < min_us) min_us = us_indices[i];
}
}
}
else {
for (i = 0; i < count; i++) {
if (us_indices[i] > max_us) max_us = us_indices[i];
if (us_indices[i] < min_us) min_us = us_indices[i];
}
}
*min_index = min_us;
*max_index = max_us;
break;
}
case GL_UNSIGNED_BYTE: {
const GLubyte *ub_indices = (const GLubyte *)indices;
GLuint max_ub = 0;
GLuint min_ub = ~0U;
if (restart) {
for (i = 0; i < count; i++) {
if (ub_indices[i] != restartIndex) {
if (ub_indices[i] > max_ub) max_ub = ub_indices[i];
if (ub_indices[i] < min_ub) min_ub = ub_indices[i];
}
}
}
else {
for (i = 0; i < count; i++) {
if (ub_indices[i] > max_ub) max_ub = ub_indices[i];
if (ub_indices[i] < min_ub) min_ub = ub_indices[i];
}
}
*min_index = min_ub;
*max_index = max_ub;
break;
}
default:
unreachable("not reached");
}
if (_mesa_is_bufferobj(ib->obj)) {
vbo_minmax_cache_store(ctx, ib->obj, ib->type, prim->start, count,
*min_index, *max_index);
ctx->Driver.UnmapBuffer(ctx, ib->obj, MAP_INTERNAL);
}
}
