diff options
Diffstat (limited to 'src/mesa/vbo/vbo_minmax_index.c')
| -rw-r--r-- | src/mesa/vbo/vbo_minmax_index.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/src/mesa/vbo/vbo_minmax_index.c b/src/mesa/vbo/vbo_minmax_index.c new file mode 100644 index 00000000000..b43ed983676 --- /dev/null +++ b/src/mesa/vbo/vbo_minmax_index.c @@ -0,0 +1,179 @@ +/* + * Mesa 3-D graphics library + * + * Copyright 2003 VMware, Inc. + * Copyright 2009 VMware, Inc. + * All Rights Reserved. + * Copyright (C) 2016 Advanced Micro Devices, Inc. + * + * 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 NON-INFRINGEMENT. IN NO EVENT SHALL + * THE AUTHOR(S) AND/OR THEIR SUPPLIERS 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 "main/glheader.h" +#include "main/context.h" +#include "main/varray.h" +#include "main/macros.h" +#include "main/sse_minmax.h" +#include "x86/common_x86_asm.h" + + +/** + * Compute min and max elements by scanning the index buffer for + * glDraw[Range]Elements() calls. + * If primitive restart is enabled, we need to ignore restart + * indexes when computing min/max. + */ +static void +vbo_get_minmax_index(struct gl_context *ctx, + const struct _mesa_prim *prim, + const struct _mesa_index_buffer *ib, + GLuint *min_index, GLuint *max_index, + const GLuint count) +{ + const GLboolean restart = ctx->Array._PrimitiveRestart; + const GLuint restartIndex = _mesa_primitive_restart_index(ctx, ib->type); + const int index_size = vbo_sizeof_ib_type(ib->type); + const char *indices; + GLuint i; + + indices = (char *) ib->ptr + prim->start * index_size; + if (_mesa_is_bufferobj(ib->obj)) { + GLsizeiptr size = MIN2(count * index_size, ib->obj->Size); + indices = ctx->Driver.MapBufferRange(ctx, (GLintptr) indices, size, + GL_MAP_READ_BIT, ib->obj, + MAP_INTERNAL); + } + + switch (ib->type) { + case GL_UNSIGNED_INT: { + const GLuint *ui_indices = (const GLuint *)indices; + GLuint max_ui = 0; + GLuint min_ui = ~0U; + if (restart) { + for (i = 0; i < count; i++) { + if (ui_indices[i] != restartIndex) { + if (ui_indices[i] > max_ui) max_ui = ui_indices[i]; + if (ui_indices[i] < min_ui) min_ui = ui_indices[i]; + } + } + } + else { +#if defined(USE_SSE41) + if (cpu_has_sse4_1) { + _mesa_uint_array_min_max(ui_indices, &min_ui, &max_ui, count); + } + else +#endif + for (i = 0; i < count; i++) { + if (ui_indices[i] > max_ui) max_ui = ui_indices[i]; + if (ui_indices[i] < min_ui) min_ui = ui_indices[i]; + } + } + *min_index = min_ui; + *max_index = max_ui; + break; + } + case GL_UNSIGNED_SHORT: { + const GLushort *us_indices = (const GLushort *)indices; + GLuint max_us = 0; + GLuint min_us = ~0U; + if (restart) { + for (i = 0; i < count; i++) { + if (us_indices[i] != restartIndex) { + if (us_indices[i] > max_us) max_us = us_indices[i]; + if (us_indices[i] < min_us) min_us = us_indices[i]; + } + } + } + else { + for (i = 0; i < count; i++) { + if (us_indices[i] > max_us) max_us = us_indices[i]; + if (us_indices[i] < min_us) min_us = us_indices[i]; + } + } + *min_index = min_us; + *max_index = max_us; + break; + } + case GL_UNSIGNED_BYTE: { + const GLubyte *ub_indices = (const GLubyte *)indices; + GLuint max_ub = 0; + GLuint min_ub = ~0U; + if (restart) { + for (i = 0; i < count; i++) { + if (ub_indices[i] != restartIndex) { + if (ub_indices[i] > max_ub) max_ub = ub_indices[i]; + if (ub_indices[i] < min_ub) min_ub = ub_indices[i]; + } + } + } + else { + for (i = 0; i < count; i++) { + if (ub_indices[i] > max_ub) max_ub = ub_indices[i]; + if (ub_indices[i] < min_ub) min_ub = ub_indices[i]; + } + } + *min_index = min_ub; + *max_index = max_ub; + break; + } + default: + unreachable("not reached"); + } + + if (_mesa_is_bufferobj(ib->obj)) { + ctx->Driver.UnmapBuffer(ctx, ib->obj, MAP_INTERNAL); + } +} + +/** + * Compute min and max elements for nr_prims + */ +void +vbo_get_minmax_indices(struct gl_context *ctx, + const struct _mesa_prim *prims, + const struct _mesa_index_buffer *ib, + GLuint *min_index, + GLuint *max_index, + GLuint nr_prims) +{ + GLuint tmp_min, tmp_max; + GLuint i; + GLuint count; + + *min_index = ~0; + *max_index = 0; + + for (i = 0; i < nr_prims; i++) { + const struct _mesa_prim *start_prim; + + start_prim = &prims[i]; + count = start_prim->count; + /* Do combination if possible to reduce map/unmap count */ + while ((i + 1 < nr_prims) && + (prims[i].start + prims[i].count == prims[i+1].start)) { + count += prims[i+1].count; + i++; + } + vbo_get_minmax_index(ctx, start_prim, ib, &tmp_min, &tmp_max, count); + *min_index = MIN2(*min_index, tmp_min); + *max_index = MAX2(*max_index, tmp_max); + } +} |