/********************************************************** * Copyright 2008-2009 VMware, Inc. All rights reserved. * * 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 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. * **********************************************************/ #include "util/u_inlines.h" #include "util/u_prim.h" #include "util/u_upload_mgr.h" #include "indices/u_indices.h" #include "svga_cmd.h" #include "svga_draw.h" #include "svga_draw_private.h" #include "svga_resource_buffer.h" #include "svga_winsys.h" #include "svga_context.h" #include "svga_hw_reg.h" /** * Return a new index buffer which contains a translation of the original * index buffer. An example of a translation is converting from QUAD * primitives to TRIANGLE primitives. Each set of four indexes for a quad * will be converted to six indices for two triangles. * * Before generating the new index buffer we'll check if the incoming * buffer already has a translated buffer that can be re-used. * This benefits demos like Cinebench R15 which has many * glDrawElements(GL_QUADS) commands (we can't draw quads natively). * * \param offset offset in bytes to first index to translate in src buffer * \param orig_prim original primitive type (like PIPE_PRIM_QUADS) * \param gen_prim new/generated primitive type (like PIPE_PRIM_TRIANGLES) * \param orig_nr number of indexes to translate in source buffer * \param gen_nr number of indexes to write into new/dest buffer * \param index_size bytes per index (2 or 4) * \param translate the translation function from the u_translate module * \param out_buf returns the new/translated index buffer * \return error code to indicate success failure */ static enum pipe_error translate_indices(struct svga_hwtnl *hwtnl, struct pipe_resource *src, unsigned offset, enum pipe_prim_type orig_prim, enum pipe_prim_type gen_prim, unsigned orig_nr, unsigned gen_nr, unsigned index_size, u_translate_func translate, struct pipe_resource **out_buf) { struct pipe_context *pipe = &hwtnl->svga->pipe; struct svga_screen *screen = svga_screen(pipe->screen); struct svga_buffer *src_sbuf = svga_buffer(src); struct pipe_transfer *src_transfer = NULL; struct pipe_transfer *dst_transfer = NULL; unsigned size = index_size * gen_nr; const void *src_map = NULL; struct pipe_resource *dst = NULL; void *dst_map = NULL; assert(index_size == 2 || index_size == 4); if (!screen->debug.no_cache_index_buffers) { /* Check if we already have a translated index buffer */ if (src_sbuf->translated_indices.buffer && src_sbuf->translated_indices.orig_prim == orig_prim && src_sbuf->translated_indices.new_prim == gen_prim && src_sbuf->translated_indices.offset == offset && src_sbuf->translated_indices.count == orig_nr && src_sbuf->translated_indices.index_size == index_size) { pipe_resource_reference(out_buf, src_sbuf->translated_indices.buffer); return PIPE_OK; } } /* Need to trim vertex count to make sure we don't write too much data * to the dst buffer in the translate() call. */ u_trim_pipe_prim(gen_prim, &gen_nr); size = index_size * gen_nr; dst = pipe_buffer_create(pipe->screen, PIPE_BIND_INDEX_BUFFER, PIPE_USAGE_DEFAULT, size); if (!dst) goto fail; src_map = pipe_buffer_map(pipe, src, PIPE_TRANSFER_READ, &src_transfer); if (!src_map) goto fail; dst_map = pipe_buffer_map(pipe, dst, PIPE_TRANSFER_WRITE, &dst_transfer); if (!dst_map) goto fail; translate((const char *) src_map + offset, 0, 0, gen_nr, 0, dst_map); pipe_buffer_unmap(pipe, src_transfer); pipe_buffer_unmap(pipe, dst_transfer); *out_buf = dst; if (!screen->debug.no_cache_index_buffers) { /* Save the new, translated index buffer in the hope we can use it * again in the future. */ pipe_resource_reference(&src_sbuf->translated_indices.buffer, dst); src_sbuf->translated_indices.orig_prim = orig_prim; src_sbuf->translated_indices.new_prim = gen_prim; src_sbuf->translated_indices.offset = offset; src_sbuf->translated_indices.count = orig_nr; src_sbuf->translated_indices.index_size = index_size; } return PIPE_OK; fail: if (src_map) pipe_buffer_unmap(pipe, src_transfer); if (dst_map) pipe_buffer_unmap(pipe, dst_transfer); if (dst) pipe->screen->resource_destroy(pipe->screen, dst); return PIPE_ERROR_OUT_OF_MEMORY; } enum pipe_error svga_hwtnl_simple_draw_range_elements(struct svga_hwtnl *hwtnl, struct pipe_resource *index_buffer, unsigned index_size, int index_bias, unsigned min_index, unsigned max_index, enum pipe_prim_type prim, unsigned start, unsigned count, unsigned start_instance, unsigned instance_count) { SVGA3dPrimitiveRange range; unsigned hw_prim; unsigned hw_count; unsigned index_offset = start * index_size; hw_prim = svga_translate_prim(prim, count, &hw_count); if (hw_count == 0) return PIPE_OK; /* nothing to draw */ range.primType = hw_prim; range.primitiveCount = hw_count; range.indexArray.offset = index_offset; range.indexArray.stride = index_size; range.indexWidth = index_size; range.indexBias = index_bias; return svga_hwtnl_prim(hwtnl, &range, count, min_index, max_index, index_buffer, start_instance, instance_count); } enum pipe_error svga_hwtnl_draw_range_elements(struct svga_hwtnl *hwtnl, struct pipe_resource *index_buffer, unsigned index_size, int index_bias, unsigned min_index, unsigned max_index, enum pipe_prim_type prim, unsigned start, unsigned count, unsigned start_instance, unsigned instance_count) { enum pipe_prim_type gen_prim; unsigned gen_size, gen_nr; enum indices_mode gen_type; u_translate_func gen_func; enum pipe_error ret = PIPE_OK; SVGA_STATS_TIME_PUSH(svga_sws(hwtnl->svga), SVGA_STATS_TIME_HWTNLDRAWELEMENTS); if (svga_need_unfilled_fallback(hwtnl, prim)) { gen_type = u_unfilled_translator(prim, index_size, count, hwtnl->api_fillmode, &gen_prim, &gen_size, &gen_nr, &gen_func); } else { gen_type = u_index_translator(svga_hw_prims, prim, index_size, count, hwtnl->api_pv, hwtnl->hw_pv, PR_DISABLE, &gen_prim, &gen_size, &gen_nr, &gen_func); } if (gen_type == U_TRANSLATE_MEMCPY) { /* No need for translation, just pass through to hardware: */ ret = svga_hwtnl_simple_draw_range_elements(hwtnl, index_buffer, index_size, index_bias, min_index, max_index, gen_prim, start, count, start_instance, instance_count); } else { struct pipe_resource *gen_buf = NULL; /* Need to allocate a new index buffer and run the translate * func to populate it. Could potentially cache this translated * index buffer with the original to avoid future * re-translations. Not much point if we're just accelerating * GL though, as index buffers are typically used only once * there. */ ret = translate_indices(hwtnl, index_buffer, start * index_size, prim, gen_prim, count, gen_nr, gen_size, gen_func, &gen_buf); if (ret == PIPE_OK) { ret = svga_hwtnl_simple_draw_range_elements(hwtnl, gen_buf, gen_size, index_bias, min_index, max_index, gen_prim, 0, gen_nr, start_instance, instance_count); } if (gen_buf) { pipe_resource_reference(&gen_buf, NULL); } } SVGA_STATS_TIME_POP(svga_sws(hwtnl->svga)); return ret; }