From: Rob Clark <robcl...@freedesktop.org>
A convenient front end to indices generate/translate code, for emulating
primitives which are not supported natively by the driver.
This handles saving/restoring index buffer state, etc.
Signed-off-by: Rob Clark <robcl...@freedesktop.org>
---
src/gallium/auxiliary/Makefile.sources | 1 +
src/gallium/auxiliary/indices/u_primconvert.c | 171 ++++++++++++++++++++++++++
src/gallium/auxiliary/indices/u_primconvert.h | 46 +++++++
3 files changed, 218 insertions(+)
create mode 100644 src/gallium/auxiliary/indices/u_primconvert.c
create mode 100644 src/gallium/auxiliary/indices/u_primconvert.h
diff --git a/src/gallium/auxiliary/Makefile.sources
b/src/gallium/auxiliary/Makefile.sources
index acbcef7..c89cbdd 100644
--- a/src/gallium/auxiliary/Makefile.sources
+++ b/src/gallium/auxiliary/Makefile.sources
@@ -43,6 +43,7 @@ C_SOURCES := \
hud/hud_cpu.c \
hud/hud_fps.c \
hud/hud_driver_query.c \
+ indices/u_primconvert.c \
os/os_misc.c \
os/os_process.c \
os/os_time.c \
diff --git a/src/gallium/auxiliary/indices/u_primconvert.c
b/src/gallium/auxiliary/indices/u_primconvert.c
new file mode 100644
index 0000000..f7cf349
--- /dev/null
+++ b/src/gallium/auxiliary/indices/u_primconvert.c
@@ -0,0 +1,171 @@
+/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
+
+/*
+ * Copyright (C) 2013 Rob Clark <robcl...@freedesktop.org>
+ *
+ * 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.
+ *
+ * Authors:
+ * Rob Clark <robcl...@freedesktop.org>
+ */
+
+/**
+ * This module converts provides a more convenient front-end to u_indices,
+ * etc, utils to convert primitive types supported not supported by the
+ * hardware. It handles binding new index buffer state, and restoring
+ * previous state after. To use, put something like this at the front of
+ * drivers pipe->draw_vbo():
+ *
+ * // emulate unsupported primitives:
+ * if (info->mode needs emulating) {
+ * util_primconvert_save_index_buffer(ctx->primconvert, &ctx->indexbuf);
+ * util_primconvert_save_rasterizer_state(ctx->primconvert,
ctx->rasterizer);
+ * util_primconvert_draw_vbo(ctx->primconvert, info);
+ * return;
+ * }
+ *
+ */
+
+#include "pipe/p_state.h"
+#include "util/u_memory.h"
+#include "util/u_inlines.h"
+
+#include "indices/u_primconvert.h"
+#include "indices/u_indices.h"
+
+struct primconvert_context {
+ struct pipe_context *pipe;
+ struct pipe_index_buffer saved_ib;
+ uint32_t primtypes_mask;
+ unsigned api_pv;
+ // TODO we could cache/recycle the indexbuf created to translate prims..
+};
+
+
+struct primconvert_context *util_primconvert_create(struct pipe_context *pipe,
+ uint32_t primtypes_mask)
+{
+ struct primconvert_context *pc = CALLOC_STRUCT(primconvert_context);
+ if (!pc)
+ return NULL;
+ pc->pipe = pipe;
+ pc->primtypes_mask = primtypes_mask;
+ return pc;
+}
+
+void util_primconvert_destroy(struct primconvert_context *pc)
+{
+ util_primconvert_save_index_buffer(pc, NULL);
+ free(pc);
+}
+
+void util_primconvert_save_index_buffer(struct primconvert_context *pc,
+ const struct pipe_index_buffer *ib)
+{
+ if (ib) {
+ pipe_resource_reference(&pc->saved_ib.buffer, ib->buffer);
+ pc->saved_ib.index_size = ib->index_size;
+ pc->saved_ib.offset = ib->offset;
+ pc->saved_ib.user_buffer = ib->user_buffer;
+ } else {
+ pipe_resource_reference(&pc->saved_ib.buffer, NULL);
+ }
+}
+
+void util_primconvert_save_rasterizer_state(struct primconvert_context *pc,
+ const struct pipe_rasterizer_state *rast)
+{
+ /* if we actually translated the provoking vertex for the buffer,
+ * we would actually need to save/restore rasterizer state. As
+ * it is, we just need to make note of the pv.
+ */
+ pc->api_pv = (rast->flatshade && !rast->flatshade_first) ? PV_LAST :
PV_FIRST;
+}
+
+void util_primconvert_draw_vbo(struct primconvert_context *pc,
+ const struct pipe_draw_info *info)
+{
+ struct pipe_index_buffer *ib = &pc->saved_ib;
+ struct pipe_index_buffer new_ib = {
+ .offset = 0,
+ };
+ struct pipe_draw_info new_info = {
+ .start = 0,
+ .indexed = true,
+ };
+ struct pipe_transfer *src_transfer = NULL, *dst_transfer = NULL;
+ u_translate_func trans_func;
+ u_generate_func gen_func;
+ const void *src;
+ void *dst;
+
+ if (info->indexed) {
+ u_index_translator(pc->primtypes_mask,
+ info->mode, pc->saved_ib.index_size,
info->count,
+ pc->api_pv, pc->api_pv,
+ &new_info.mode, &new_ib.index_size,
&new_info.count,
+ &trans_func);
+ src = ib->user_buffer;
+ if (!src) {
+ src = pipe_buffer_map(pc->pipe, ib->buffer,
+ PIPE_TRANSFER_READ, &src_transfer);
+ }
+ } else {
+ u_index_generator(pc->primtypes_mask,
+ info->mode, info->start, info->count,
+ pc->api_pv, pc->api_pv,
+ &new_info.mode, &new_ib.index_size,
&new_info.count,
+ &gen_func);
+ }
+
+
+ new_ib.buffer = pipe_buffer_create(pc->pipe->screen,
+ PIPE_BIND_INDEX_BUFFER, PIPE_USAGE_IMMUTABLE,
+ new_ib.index_size * new_info.count);
+ dst = pipe_buffer_map(pc->pipe, new_ib.buffer,
+ PIPE_TRANSFER_WRITE, &dst_transfer);
+
+ if (info->indexed) {
+ new_info.min_index = 0;
+ new_info.max_index = ~0;
+ trans_func(src, info->start, new_info.count, dst);
+ } else {
+ new_info.min_index = info->start;
+ new_info.max_index = info->start + new_info.count;
+ gen_func(info->start, new_info.count, dst);
+ }
+
+ if (src_transfer)
+ pipe_buffer_unmap(pc->pipe, src_transfer);
+
+ if (dst_transfer)
+ pipe_buffer_unmap(pc->pipe, dst_transfer);
+
+ /* bind new index buffer: */
+ pc->pipe->set_index_buffer(pc->pipe, &new_ib);
+
+ /* to the translated draw: */
+ pc->pipe->draw_vbo(pc->pipe, &new_info);
+
+ /* and then restore saved ib: */
+ pc->pipe->set_index_buffer(pc->pipe, ib);
+
+ pipe_resource_reference(&new_ib.buffer, NULL);
+}
diff --git a/src/gallium/auxiliary/indices/u_primconvert.h
b/src/gallium/auxiliary/indices/u_primconvert.h
new file mode 100644
index 0000000..67d878c
--- /dev/null
+++ b/src/gallium/auxiliary/indices/u_primconvert.h
@@ -0,0 +1,46 @@
+/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
+
+/*
+ * Copyright (C) 2013 Rob Clark <robcl...@freedesktop.org>
+ *
+ * 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.
+ *
+ * Authors:
+ * Rob Clark <robcl...@freedesktop.org>
+ */
+
+#ifndef U_PRIMCONVERT_H_
+#define U_PRIMCONVERT_H_
+
+#include "pipe/p_state.h"
+
+struct primconvert_context;
+
+struct primconvert_context *util_primconvert_create(struct pipe_context *pipe,
+ uint32_t primtypes_mask);
+void util_primconvert_destroy(struct primconvert_context *pc);
+void util_primconvert_save_index_buffer(struct primconvert_context *pc,
+ const struct pipe_index_buffer *ib);
+void util_primconvert_save_rasterizer_state(struct primconvert_context *pc,
+ const struct pipe_rasterizer_state *rast);
+void util_primconvert_draw_vbo(struct primconvert_context *pc,
+ const struct pipe_draw_info *info);
+
+#endif /* U_PRIMCONVERT_H_ */
--
1.8.3.1
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