#include "main/bufferobj.h"
#include "main/context.h"
-#include "main/mfeatures.h"
#include "main/transformfeedback.h"
+#include "util/u_memory.h"
#include "st_cb_bufferobjects.h"
#include "st_cb_xformfb.h"
#include "util/u_inlines.h"
#include "cso_cache/cso_context.h"
-#if FEATURE_EXT_transform_feedback
-
struct st_transform_feedback_object {
struct gl_transform_feedback_object base;
unsigned num_targets;
struct pipe_stream_output_target *targets[PIPE_MAX_SO_BUFFERS];
+
+ /* This encapsulates the count that can be used as a source for draw_vbo.
+ * It contains stream output targets from the last call of
+ * EndTransformFeedback for each stream. */
+ struct pipe_stream_output_target *draw_count[MAX_VERTEX_STREAMS];
};
+static inline struct st_transform_feedback_object *
+st_transform_feedback_object(struct gl_transform_feedback_object *obj)
+{
+ return (struct st_transform_feedback_object *) obj;
+}
static struct gl_transform_feedback_object *
st_new_transform_feedback(struct gl_context *ctx, GLuint name)
if (!obj)
return NULL;
- obj->base.Name = name;
- obj->base.RefCount = 1;
+ _mesa_init_transform_feedback_object(&obj->base, name);
+
return &obj->base;
}
struct gl_transform_feedback_object *obj)
{
struct st_transform_feedback_object *sobj =
- (struct st_transform_feedback_object*)obj;
+ st_transform_feedback_object(obj);
unsigned i;
+ for (i = 0; i < ARRAY_SIZE(sobj->draw_count); i++)
+ pipe_so_target_reference(&sobj->draw_count[i], NULL);
+
/* Unreference targets. */
for (i = 0; i < sobj->num_targets; i++) {
pipe_so_target_reference(&sobj->targets[i], NULL);
}
- for (i = 0; i < Elements(sobj->base.Buffers); i++) {
- _mesa_reference_buffer_object(ctx, &sobj->base.Buffers[i], NULL);
- }
-
- free(obj);
+ _mesa_delete_transform_feedback_object(ctx, obj);
}
struct st_context *st = st_context(ctx);
struct pipe_context *pipe = st->pipe;
struct st_transform_feedback_object *sobj =
- (struct st_transform_feedback_object*)obj;
+ st_transform_feedback_object(obj);
unsigned i, max_num_targets;
+ unsigned offsets[PIPE_MAX_SO_BUFFERS] = {0};
- max_num_targets = MIN2(Elements(sobj->base.Buffers),
- Elements(sobj->targets));
+ max_num_targets = MIN2(ARRAY_SIZE(sobj->base.Buffers),
+ ARRAY_SIZE(sobj->targets));
/* Convert the transform feedback state into the gallium representation. */
for (i = 0; i < max_num_targets; i++) {
struct st_buffer_object *bo = st_buffer_object(sobj->base.Buffers[i]);
- if (bo) {
+ if (bo && bo->buffer) {
+ unsigned stream = obj->program->sh.LinkedTransformFeedback->
+ Buffers[i].Stream;
+
/* Check whether we need to recreate the target. */
if (!sobj->targets[i] ||
+ sobj->targets[i] == sobj->draw_count[stream] ||
sobj->targets[i]->buffer != bo->buffer ||
sobj->targets[i]->buffer_offset != sobj->base.Offset[i] ||
sobj->targets[i]->buffer_size != sobj->base.Size[i]) {
}
/* Start writing at the beginning of each target. */
- cso_set_stream_outputs(st->cso_context, sobj->num_targets, sobj->targets,
- 0);
+ cso_set_stream_outputs(st->cso_context, sobj->num_targets,
+ sobj->targets, offsets);
}
static void
-st_stop_transform_feedback(struct gl_context *ctx,
+st_pause_transform_feedback(struct gl_context *ctx,
struct gl_transform_feedback_object *obj)
{
struct st_context *st = st_context(ctx);
- cso_set_stream_outputs(st->cso_context, 0, NULL, 0);
+ cso_set_stream_outputs(st->cso_context, 0, NULL, NULL);
}
{
struct st_context *st = st_context(ctx);
struct st_transform_feedback_object *sobj =
- (struct st_transform_feedback_object*)obj;
+ st_transform_feedback_object(obj);
+ unsigned offsets[PIPE_MAX_SO_BUFFERS];
+ unsigned i;
+
+ for (i = 0; i < PIPE_MAX_SO_BUFFERS; i++)
+ offsets[i] = (unsigned)-1;
- cso_set_stream_outputs(st->cso_context, sobj->num_targets, sobj->targets,
- ~0);
+ cso_set_stream_outputs(st->cso_context, sobj->num_targets,
+ sobj->targets, offsets);
}
-/* Set count_from_stream_output to any stream output target
- * from the transform feedback object. */
-void
-st_transform_feedback_draw_init(struct gl_transform_feedback_object *obj,
- struct pipe_draw_info *out)
+
+static void
+st_end_transform_feedback(struct gl_context *ctx,
+ struct gl_transform_feedback_object *obj)
{
+ struct st_context *st = st_context(ctx);
struct st_transform_feedback_object *sobj =
- (struct st_transform_feedback_object*)obj;
+ st_transform_feedback_object(obj);
unsigned i;
- for (i = 0; i < Elements(sobj->targets); i++) {
- if (sobj->targets[i]) {
- out->count_from_stream_output = sobj->targets[i];
- return;
- }
+ cso_set_stream_outputs(st->cso_context, 0, NULL, NULL);
+
+ /* The next call to glDrawTransformFeedbackStream should use the vertex
+ * count from the last call to glEndTransformFeedback.
+ * Therefore, save the targets for each stream.
+ *
+ * NULL means the vertex counter is 0 (initial state).
+ */
+ for (i = 0; i < ARRAY_SIZE(sobj->draw_count); i++)
+ pipe_so_target_reference(&sobj->draw_count[i], NULL);
+
+ for (i = 0; i < ARRAY_SIZE(sobj->targets); i++) {
+ unsigned stream = obj->program->sh.LinkedTransformFeedback->
+ Buffers[i].Stream;
+
+ /* Is it not bound or already set for this stream? */
+ if (!sobj->targets[i] || sobj->draw_count[stream])
+ continue;
+
+ pipe_so_target_reference(&sobj->draw_count[stream], sobj->targets[i]);
}
+}
+
- assert(0);
- out->count_from_stream_output = NULL;
+bool
+st_transform_feedback_draw_init(struct gl_transform_feedback_object *obj,
+ unsigned stream, struct pipe_draw_info *out)
+{
+ struct st_transform_feedback_object *sobj =
+ st_transform_feedback_object(obj);
+
+ out->count_from_stream_output = sobj->draw_count[stream];
+ return out->count_from_stream_output != NULL;
}
functions->NewTransformFeedback = st_new_transform_feedback;
functions->DeleteTransformFeedback = st_delete_transform_feedback;
functions->BeginTransformFeedback = st_begin_transform_feedback;
- functions->EndTransformFeedback = st_stop_transform_feedback;
- functions->PauseTransformFeedback = st_stop_transform_feedback;
+ functions->EndTransformFeedback = st_end_transform_feedback;
+ functions->PauseTransformFeedback = st_pause_transform_feedback;
functions->ResumeTransformFeedback = st_resume_transform_feedback;
}
-
-#endif /* FEATURE_EXT_transform_feedback */
projects / mesa.git / blobdiff