| 0,0 → 1,184 |
|---|
| /* |
| * Copyright (C) 2013 Rob Clark <robclark@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 <robclark@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_draw.h" |
| #include "util/u_inlines.h" |
| #include "util/u_memory.h" |
| #include "util/u_upload_mgr.h" |
| |
| #include "indices/u_indices.h" |
| #include "indices/u_primconvert.h" |
| |
| struct primconvert_context |
| { |
| struct pipe_context *pipe; |
| struct pipe_index_buffer saved_ib; |
| uint32_t primtypes_mask; |
| unsigned api_pv; |
| struct u_upload_mgr *upload; |
| }; |
| |
| |
| 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) |
| { |
| if (pc->upload) |
| u_upload_destroy(pc->upload); |
| 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_first ? PV_FIRST : PV_LAST; |
| } |
| |
| 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; |
| struct pipe_draw_info new_info; |
| struct pipe_transfer *src_transfer = NULL; |
| u_translate_func trans_func; |
| u_generate_func gen_func; |
| const void *src = NULL; |
| void *dst; |
| |
| memset(&new_ib, 0, sizeof(new_ib)); |
| util_draw_init_info(&new_info); |
| new_info.indexed = true; |
| new_info.min_index = info->min_index; |
| new_info.max_index = info->max_index; |
| new_info.index_bias = info->index_bias; |
| new_info.start_instance = info->start_instance; |
| new_info.instance_count = info->instance_count; |
| new_info.primitive_restart = info->primitive_restart; |
| new_info.restart_index = info->restart_index; |
| if (info->indexed) { |
| u_index_translator(pc->primtypes_mask, |
| info->mode, pc->saved_ib.index_size, info->count, |
| pc->api_pv, pc->api_pv, |
| info->primitive_restart ? PR_ENABLE : PR_DISABLE, |
| &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); |
| } |
| src = (const uint8_t *)src + ib->offset; |
| } |
| 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); |
| } |
| |
| if (!pc->upload) { |
| pc->upload = u_upload_create(pc->pipe, 4096, 4, PIPE_BIND_INDEX_BUFFER); |
| } |
| |
| u_upload_alloc(pc->upload, 0, new_ib.index_size * new_info.count, |
| &new_ib.offset, &new_ib.buffer, &dst); |
| |
| if (info->indexed) { |
| trans_func(src, info->start, info->count, new_info.count, info->restart_index, dst); |
| } |
| else { |
| gen_func(info->start, new_info.count, dst); |
| } |
| |
| if (src_transfer) |
| pipe_buffer_unmap(pc->pipe, src_transfer); |
| |
| u_upload_unmap(pc->upload); |
| |
| /* 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); |
| } |