/* This is the fast-path drawing & emission for HW TCL. */
boolean 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);
if (!u_trim_pipe_prim(mode, &count)) {
return FALSE;
}
if (count > 65535) {
return FALSE;
}
r300_update_derived_state(r300);
if (!r300_setup_vertex_buffers(r300)) {
return FALSE;
}
setup_vertex_attributes(r300);
setup_index_buffer(r300, indexBuffer, indexSize);
r300_emit_dirty_state(r300);
r300_emit_aos(r300, 0);
r300_emit_draw_elements(r300, indexBuffer, indexSize, minIndex, maxIndex,
mode, start, count);
return TRUE;
}
static void r300_draw_elements(struct r300_context *r300,
const struct pipe_draw_info *info,
int instance_id)
{
struct pipe_resource *indexBuffer = r300->index_buffer.buffer;
unsigned indexSize = r300->index_buffer.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, &r300->index_buffer, &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)->cs_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 (r300->index_buffer.user_buffer)
r300_upload_index_buffer(r300, &indexBuffer, indexSize,
&start, count,
r300->index_buffer.user_buffer);
}
/* 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 );
}
}
/* This is the fast-path drawing & emission for HW TCL. */
static void r300_draw_range_elements(struct pipe_context* pipe,
struct pipe_resource* indexBuffer,
unsigned indexSize,
int indexBias,
unsigned minIndex,
unsigned maxIndex,
unsigned mode,
unsigned start,
unsigned count)
{
struct r300_context* r300 = r300_context(pipe);
struct pipe_resource* orgIndexBuffer = indexBuffer;
boolean alt_num_verts = r300->screen->caps.is_r500 &&
count > 65536 &&
r300->rws->get_value(r300->rws, R300_VID_DRM_2_3_0);
unsigned short_count;
int buffer_offset = 0, index_offset = 0; /* for index bias emulation */
boolean translate = FALSE;
unsigned new_offset;
if (r300->skip_rendering) {
return;
}
if (!u_trim_pipe_prim(mode, &count)) {
return;
}
/* Index buffer range checking. */
if ((start + count) * indexSize > indexBuffer->width0) {
fprintf(stderr, "r300: Invalid index buffer range. Skipping rendering.\n");
return;
}
/* Set up fallback for incompatible vertex layout if needed. */
if (r300->incompatible_vb_layout || r300->velems->incompatible_layout) {
r300_begin_vertex_translate(r300);
translate = TRUE;
}
if (indexBias && !r500_index_bias_supported(r300)) {
r300_split_index_bias(r300, indexBias, &buffer_offset, &index_offset);
}
r300_translate_index_buffer(r300, &indexBuffer, &indexSize, index_offset,
&start, count);
r300_update_derived_state(r300);
r300_upload_index_buffer(r300, &indexBuffer, indexSize, start, count, &new_offset);
start = new_offset;
/* 15 dwords for emit_draw_elements. Give up if the function fails. */
if (!r300_prepare_for_rendering(r300,
PREP_FIRST_DRAW | PREP_VALIDATE_VBOS | PREP_EMIT_AOS |
PREP_INDEXED, indexBuffer, 15, buffer_offset, indexBias))
goto done;
if (alt_num_verts || count <= 65535) {
r300_emit_draw_elements(r300, indexBuffer, indexSize,
minIndex, maxIndex, mode, start, count);
} else {
do {
short_count = MIN2(count, 65534);
r300_emit_draw_elements(r300, indexBuffer, indexSize,
minIndex, maxIndex,
mode, start, short_count);
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_AOS | PREP_INDEXED,
indexBuffer, 15, buffer_offset, indexBias))
goto done;
}
} while (count);
}
done:
if (indexBuffer != orgIndexBuffer) {
pipe_resource_reference( &indexBuffer, NULL );
}
if (translate) {
r300_end_vertex_translate(r300);
}
}
