diff options
Diffstat (limited to 'source/blender/gpu/intern/gpu_batch.cc')
| -rw-r--r-- | source/blender/gpu/intern/gpu_batch.cc | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/source/blender/gpu/intern/gpu_batch.cc b/source/blender/gpu/intern/gpu_batch.cc index a6ba4d3d89a..5b8a3c4636b 100644 --- a/source/blender/gpu/intern/gpu_batch.cc +++ b/source/blender/gpu/intern/gpu_batch.cc @@ -796,193 +796,6 @@ void GPU_draw_primitive(GPUPrimType prim_type, int v_count) } /* -------------------------------------------------------------------- */ -/** \name Indirect Draw Calls - * \{ */ - -#if 0 -# define USE_MULTI_DRAW_INDIRECT 0 -#else -# define USE_MULTI_DRAW_INDIRECT \ - (GL_ARB_multi_draw_indirect && GPU_arb_base_instance_is_supported()) -#endif - -typedef struct GPUDrawCommand { - uint v_count; - uint i_count; - uint v_first; - uint i_first; -} GPUDrawCommand; - -typedef struct GPUDrawCommandIndexed { - uint v_count; - uint i_count; - uint v_first; - uint base_index; - uint i_first; -} GPUDrawCommandIndexed; - -struct GPUDrawList { - GPUBatch *batch; - uint base_index; /* Avoid dereferencing batch. */ - uint cmd_offset; /* in bytes, offset inside indirect command buffer. */ - uint cmd_len; /* Number of used command for the next call. */ - uint buffer_size; /* in bytes, size of indirect command buffer. */ - GLuint buffer_id; /* Draw Indirect Buffer id */ - union { - GPUDrawCommand *commands; - GPUDrawCommandIndexed *commands_indexed; - }; -}; - -GPUDrawList *GPU_draw_list_create(int length) -{ - GPUDrawList *list = (GPUDrawList *)MEM_callocN(sizeof(GPUDrawList), "GPUDrawList"); - /* Alloc the biggest possible command list which is indexed. */ - list->buffer_size = sizeof(GPUDrawCommandIndexed) * length; - if (USE_MULTI_DRAW_INDIRECT) { - list->buffer_id = GPU_buf_alloc(); - glBindBuffer(GL_DRAW_INDIRECT_BUFFER, list->buffer_id); - glBufferData(GL_DRAW_INDIRECT_BUFFER, list->buffer_size, NULL, GL_DYNAMIC_DRAW); - } - else { - list->commands = (GPUDrawCommand *)MEM_mallocN(list->buffer_size, "GPUDrawList data"); - } - return list; -} - -void GPU_draw_list_discard(GPUDrawList *list) -{ - if (list->buffer_id) { - GPU_buf_free(list->buffer_id); - } - else { - MEM_SAFE_FREE(list->commands); - } - MEM_freeN(list); -} - -void GPU_draw_list_init(GPUDrawList *list, GPUBatch *batch) -{ - BLI_assert(batch->phase == GPU_BATCH_READY_TO_DRAW); - list->batch = batch; - list->base_index = batch->elem ? BASE_INDEX(batch->elem) : UINT_MAX; - list->cmd_len = 0; - - if (USE_MULTI_DRAW_INDIRECT) { - if (list->commands == NULL) { - glBindBuffer(GL_DRAW_INDIRECT_BUFFER, list->buffer_id); - if (list->cmd_offset >= list->buffer_size) { - /* Orphan buffer data and start fresh. */ - glBufferData(GL_DRAW_INDIRECT_BUFFER, list->buffer_size, NULL, GL_DYNAMIC_DRAW); - list->cmd_offset = 0; - } - GLenum flags = GL_MAP_WRITE_BIT | GL_MAP_UNSYNCHRONIZED_BIT | GL_MAP_FLUSH_EXPLICIT_BIT; - list->commands = (GPUDrawCommand *)glMapBufferRange( - GL_DRAW_INDIRECT_BUFFER, list->cmd_offset, list->buffer_size - list->cmd_offset, flags); - } - } - else { - list->cmd_offset = 0; - } -} - -void GPU_draw_list_command_add( - GPUDrawList *list, int v_first, int v_count, int i_first, int i_count) -{ - BLI_assert(list->commands); - - if (v_count == 0 || i_count == 0) { - return; - } - - if (list->base_index != UINT_MAX) { - GPUDrawCommandIndexed *cmd = list->commands_indexed + list->cmd_len; - cmd->v_first = v_first; - cmd->v_count = v_count; - cmd->i_count = i_count; - cmd->base_index = list->base_index; - cmd->i_first = i_first; - } - else { - GPUDrawCommand *cmd = list->commands + list->cmd_len; - cmd->v_first = v_first; - cmd->v_count = v_count; - cmd->i_count = i_count; - cmd->i_first = i_first; - } - - list->cmd_len++; - uint offset = list->cmd_offset + list->cmd_len * sizeof(GPUDrawCommandIndexed); - - if (offset == list->buffer_size) { - GPU_draw_list_submit(list); - GPU_draw_list_init(list, list->batch); - } -} - -void GPU_draw_list_submit(GPUDrawList *list) -{ - GPUBatch *batch = list->batch; - - if (list->cmd_len == 0) { - return; - } - - BLI_assert(list->commands); - BLI_assert(batch->program_in_use); - /* TODO could assert that VAO is bound. */ - - /* TODO We loose a bit of memory here if we only draw arrays. Fix that. */ - uintptr_t offset = list->cmd_offset; - uint cmd_len = list->cmd_len; - size_t bytes_used = cmd_len * sizeof(GPUDrawCommandIndexed); - list->cmd_len = 0; /* Avoid reuse. */ - - /* Only do multi-draw indirect if doing more than 2 drawcall. - * This avoids the overhead of buffer mapping if scene is - * not very instance friendly. - * BUT we also need to take into account the case where only - * a few instances are needed to finish filling a call buffer. */ - const bool do_mdi = (cmd_len > 2) || (list->cmd_offset + bytes_used == list->buffer_size); - - if (USE_MULTI_DRAW_INDIRECT && do_mdi) { - GLenum prim = batch->gl_prim_type; - - glBindBuffer(GL_DRAW_INDIRECT_BUFFER, list->buffer_id); - glFlushMappedBufferRange(GL_DRAW_INDIRECT_BUFFER, 0, bytes_used); - glUnmapBuffer(GL_DRAW_INDIRECT_BUFFER); - list->commands = NULL; /* Unmapped */ - list->cmd_offset += bytes_used; - - if (batch->elem) { - glMultiDrawElementsIndirect(prim, INDEX_TYPE(batch->elem), (void *)offset, cmd_len, 0); - } - else { - glMultiDrawArraysIndirect(prim, (void *)offset, cmd_len, 0); - } - } - else { - /* Fallback */ - if (batch->elem) { - GPUDrawCommandIndexed *cmd = list->commands_indexed; - for (int i = 0; i < cmd_len; i++, cmd++) { - /* Index start was added by Draw manager. Avoid counting it twice. */ - cmd->v_first -= batch->elem->index_start; - GPU_batch_draw_advanced(batch, cmd->v_first, cmd->v_count, cmd->i_first, cmd->i_count); - } - } - else { - GPUDrawCommand *cmd = list->commands; - for (int i = 0; i < cmd_len; i++, cmd++) { - GPU_batch_draw_advanced(batch, cmd->v_first, cmd->v_count, cmd->i_first, cmd->i_count); - } - } - } -} - -/** \} */ - -/* -------------------------------------------------------------------- */ /** \name Utilities * \{ */ |