| /* |
| * Mesa 3-D graphics library |
| * |
| * Copyright (C) 1999-2008 Brian Paul 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. |
| * |
| * Authors: |
| * Keith Whitwell <keithw@vmware.com> |
| */ |
| |
| #include <stdbool.h> |
| #include <stdio.h> |
| #include "main/arrayobj.h" |
| #include "main/glheader.h" |
| #include "main/bufferobj.h" |
| #include "main/context.h" |
| #include "main/enums.h" |
| #include "main/state.h" |
| #include "main/varray.h" |
| #include "main/vtxfmt.h" |
| |
| #include "vbo_noop.h" |
| #include "vbo_private.h" |
| |
| |
| static void |
| vbo_exec_debug_verts(struct vbo_exec_context *exec) |
| { |
| GLuint count = exec->vtx.vert_count; |
| GLuint i; |
| |
| printf("%s: %u vertices %d primitives, %d vertsize\n", |
| __func__, |
| count, |
| exec->vtx.prim_count, |
| exec->vtx.vertex_size); |
| |
| for (i = 0 ; i < exec->vtx.prim_count ; i++) { |
| struct _mesa_prim *prim = &exec->vtx.prim[i]; |
| printf(" prim %d: %s%s %d..%d %s %s\n", |
| i, |
| _mesa_lookup_prim_by_nr(prim->mode), |
| prim->weak ? " (weak)" : "", |
| prim->start, |
| prim->start + prim->count, |
| prim->begin ? "BEGIN" : "(wrap)", |
| prim->end ? "END" : "(wrap)"); |
| } |
| } |
| |
| |
| /** |
| * Copy zero, one or two vertices from the current vertex buffer into |
| * the temporary "copy" buffer. |
| * This is used when a single primitive overflows a vertex buffer and |
| * we need to continue the primitive in a new vertex buffer. |
| * The temporary "copy" buffer holds the vertices which need to get |
| * copied from the old buffer to the new one. |
| */ |
| static GLuint |
| vbo_copy_vertices(struct vbo_exec_context *exec) |
| { |
| struct _mesa_prim *last_prim = &exec->vtx.prim[exec->vtx.prim_count - 1]; |
| const GLuint nr = last_prim->count; |
| GLuint ovf, i; |
| const GLuint sz = exec->vtx.vertex_size; |
| fi_type *dst = exec->vtx.copied.buffer; |
| const fi_type *src = exec->vtx.buffer_map + last_prim->start * sz; |
| |
| switch (exec->ctx->Driver.CurrentExecPrimitive) { |
| case GL_POINTS: |
| return 0; |
| case GL_LINES: |
| ovf = nr&1; |
| for (i = 0 ; i < ovf ; i++) |
| memcpy(dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat)); |
| return i; |
| case GL_TRIANGLES: |
| ovf = nr%3; |
| for (i = 0 ; i < ovf ; i++) |
| memcpy(dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat)); |
| return i; |
| case GL_QUADS: |
| ovf = nr&3; |
| for (i = 0 ; i < ovf ; i++) |
| memcpy(dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat)); |
| return i; |
| case GL_LINE_STRIP: |
| if (nr == 0) { |
| return 0; |
| } |
| else { |
| memcpy(dst, src+(nr-1)*sz, sz * sizeof(GLfloat)); |
| return 1; |
| } |
| case GL_LINE_LOOP: |
| if (last_prim->begin == 0) { |
| /* We're dealing with the second or later section of a split/wrapped |
| * GL_LINE_LOOP. Since we're converting line loops to line strips, |
| * we've already increment the last_prim->start counter by one to |
| * skip the 0th vertex in the loop. We need to undo that (effectively |
| * subtract one from last_prim->start) so that we copy the 0th vertex |
| * to the next vertex buffer. |
| */ |
| assert(last_prim->start > 0); |
| src -= sz; |
| } |
| /* fall-through */ |
| case GL_TRIANGLE_FAN: |
| case GL_POLYGON: |
| if (nr == 0) { |
| return 0; |
| } |
| else if (nr == 1) { |
| memcpy(dst, src+0, sz * sizeof(GLfloat)); |
| return 1; |
| } |
| else { |
| memcpy(dst, src+0, sz * sizeof(GLfloat)); |
| memcpy(dst+sz, src+(nr-1)*sz, sz * sizeof(GLfloat)); |
| return 2; |
| } |
| case GL_TRIANGLE_STRIP: |
| /* no parity issue, but need to make sure the tri is not drawn twice */ |
| if (nr & 1) { |
| last_prim->count--; |
| } |
| /* fallthrough */ |
| case GL_QUAD_STRIP: |
| switch (nr) { |
| case 0: |
| ovf = 0; |
| break; |
| case 1: |
| ovf = 1; |
| break; |
| default: |
| ovf = 2 + (nr & 1); |
| break; |
| } |
| for (i = 0 ; i < ovf ; i++) |
| memcpy(dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat)); |
| return i; |
| case PRIM_OUTSIDE_BEGIN_END: |
| return 0; |
| default: |
| unreachable("Unexpected primitive type"); |
| return 0; |
| } |
| } |
| |
| |
| |
| /* TODO: populate these as the vertex is defined: |
| */ |
| static void |
| vbo_exec_bind_arrays(struct gl_context *ctx) |
| { |
| struct vbo_context *vbo = vbo_context(ctx); |
| struct gl_vertex_array_object *vao = vbo->VAO; |
| struct vbo_exec_context *exec = &vbo->exec; |
| |
| GLintptr buffer_offset; |
| if (_mesa_is_bufferobj(exec->vtx.bufferobj)) { |
| assert(exec->vtx.bufferobj->Mappings[MAP_INTERNAL].Pointer); |
| buffer_offset = exec->vtx.bufferobj->Mappings[MAP_INTERNAL].Offset; |
| } else { |
| /* Ptr into ordinary app memory */ |
| buffer_offset = (GLbyte *)exec->vtx.buffer_map - (GLbyte *)NULL; |
| } |
| |
| const gl_vertex_processing_mode mode = ctx->VertexProgram._VPMode; |
| |
| /* Compute the bitmasks of vao_enabled arrays */ |
| GLbitfield vao_enabled = _vbo_get_vao_enabled_from_vbo(mode, exec->vtx.enabled); |
| |
| /* At first disable arrays no longer needed */ |
| GLbitfield mask = vao->_Enabled & ~vao_enabled; |
| while (mask) { |
| const int vao_attr = u_bit_scan(&mask); |
| _mesa_disable_vertex_array_attrib(ctx, vao, vao_attr); |
| } |
| assert((~vao_enabled & vao->_Enabled) == 0); |
| |
| /* Bind the buffer object */ |
| const GLuint stride = exec->vtx.vertex_size*sizeof(GLfloat); |
| _mesa_bind_vertex_buffer(ctx, vao, 0, exec->vtx.bufferobj, buffer_offset, |
| stride); |
| |
| /* Retrieve the mapping from VBO_ATTRIB to VERT_ATTRIB space |
| * Note that the position/generic0 aliasing is done in the VAO. |
| */ |
| const GLubyte *const vao_to_vbo_map = _vbo_attribute_alias_map[mode]; |
| /* Now set the enabled arrays */ |
| mask = vao_enabled; |
| while (mask) { |
| const int vao_attr = u_bit_scan(&mask); |
| const GLubyte vbo_attr = vao_to_vbo_map[vao_attr]; |
| |
| const GLubyte size = exec->vtx.attrsz[vbo_attr]; |
| const GLenum16 type = exec->vtx.attrtype[vbo_attr]; |
| const GLuint offset = (GLuint)((GLbyte *)exec->vtx.attrptr[vbo_attr] - |
| (GLbyte *)exec->vtx.vertex); |
| assert(offset <= ctx->Const.MaxVertexAttribRelativeOffset); |
| |
| /* Set and enable */ |
| _vbo_set_attrib_format(ctx, vao, vao_attr, buffer_offset, |
| size, type, offset); |
| if ((vao->_Enabled & VERT_BIT(vao_attr)) == 0) |
| _mesa_enable_vertex_array_attrib(ctx, vao, vao_attr); |
| |
| /* The vao is initially created with all bindings set to 0. */ |
| assert(vao->VertexAttrib[vao_attr].BufferBindingIndex == 0); |
| } |
| assert(vao_enabled == vao->_Enabled); |
| assert(!_mesa_is_bufferobj(exec->vtx.bufferobj) || |
| (vao_enabled & ~vao->VertexAttribBufferMask) == 0); |
| |
| _mesa_set_draw_vao(ctx, vao, _vbo_get_vao_filter(mode)); |
| } |
| |
| |
| /** |
| * Unmap the VBO. This is called before drawing. |
| */ |
| static void |
| vbo_exec_vtx_unmap(struct vbo_exec_context *exec) |
| { |
| if (_mesa_is_bufferobj(exec->vtx.bufferobj)) { |
| struct gl_context *ctx = exec->ctx; |
| |
| if (ctx->Driver.FlushMappedBufferRange) { |
| GLintptr offset = exec->vtx.buffer_used - |
| exec->vtx.bufferobj->Mappings[MAP_INTERNAL].Offset; |
| GLsizeiptr length = (exec->vtx.buffer_ptr - exec->vtx.buffer_map) * |
| sizeof(float); |
| |
| if (length) |
| ctx->Driver.FlushMappedBufferRange(ctx, offset, length, |
| exec->vtx.bufferobj, |
| MAP_INTERNAL); |
| } |
| |
| exec->vtx.buffer_used += (exec->vtx.buffer_ptr - |
| exec->vtx.buffer_map) * sizeof(float); |
| |
| assert(exec->vtx.buffer_used <= VBO_VERT_BUFFER_SIZE); |
| assert(exec->vtx.buffer_ptr != NULL); |
| |
| ctx->Driver.UnmapBuffer(ctx, exec->vtx.bufferobj, MAP_INTERNAL); |
| exec->vtx.buffer_map = NULL; |
| exec->vtx.buffer_ptr = NULL; |
| exec->vtx.max_vert = 0; |
| } |
| } |
| |
| |
| /** |
| * Map the vertex buffer to begin storing glVertex, glColor, etc data. |
| */ |
| void |
| vbo_exec_vtx_map(struct vbo_exec_context *exec) |
| { |
| struct gl_context *ctx = exec->ctx; |
| const GLenum accessRange = GL_MAP_WRITE_BIT | /* for MapBufferRange */ |
| GL_MAP_INVALIDATE_RANGE_BIT | |
| GL_MAP_UNSYNCHRONIZED_BIT | |
| GL_MAP_FLUSH_EXPLICIT_BIT | |
| MESA_MAP_NOWAIT_BIT; |
| const GLenum usage = GL_STREAM_DRAW_ARB; |
| |
| if (!_mesa_is_bufferobj(exec->vtx.bufferobj)) |
| return; |
| |
| assert(!exec->vtx.buffer_map); |
| assert(!exec->vtx.buffer_ptr); |
| |
| if (VBO_VERT_BUFFER_SIZE > exec->vtx.buffer_used + 1024) { |
| /* The VBO exists and there's room for more */ |
| if (exec->vtx.bufferobj->Size > 0) { |
| exec->vtx.buffer_map = (fi_type *) |
| ctx->Driver.MapBufferRange(ctx, |
| exec->vtx.buffer_used, |
| VBO_VERT_BUFFER_SIZE |
| - exec->vtx.buffer_used, |
| accessRange, |
| exec->vtx.bufferobj, |
| MAP_INTERNAL); |
| exec->vtx.buffer_ptr = exec->vtx.buffer_map; |
| } |
| else { |
| exec->vtx.buffer_ptr = exec->vtx.buffer_map = NULL; |
| } |
| } |
| |
| if (!exec->vtx.buffer_map) { |
| /* Need to allocate a new VBO */ |
| exec->vtx.buffer_used = 0; |
| |
| if (ctx->Driver.BufferData(ctx, GL_ARRAY_BUFFER_ARB, |
| VBO_VERT_BUFFER_SIZE, |
| NULL, usage, |
| GL_MAP_WRITE_BIT | |
| GL_DYNAMIC_STORAGE_BIT | |
| GL_CLIENT_STORAGE_BIT, |
| exec->vtx.bufferobj)) { |
| /* buffer allocation worked, now map the buffer */ |
| exec->vtx.buffer_map = |
| (fi_type *)ctx->Driver.MapBufferRange(ctx, |
| 0, VBO_VERT_BUFFER_SIZE, |
| accessRange, |
| exec->vtx.bufferobj, |
| MAP_INTERNAL); |
| } |
| else { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "VBO allocation"); |
| exec->vtx.buffer_map = NULL; |
| } |
| } |
| |
| exec->vtx.buffer_ptr = exec->vtx.buffer_map; |
| |
| if (!exec->vtx.buffer_map) { |
| /* out of memory */ |
| _mesa_install_exec_vtxfmt(ctx, &exec->vtxfmt_noop); |
| } |
| else { |
| if (_mesa_using_noop_vtxfmt(ctx->Exec)) { |
| /* The no-op functions are installed so switch back to regular |
| * functions. We do this test just to avoid frequent and needless |
| * calls to _mesa_install_exec_vtxfmt(). |
| */ |
| _mesa_install_exec_vtxfmt(ctx, &exec->vtxfmt); |
| } |
| } |
| |
| if (0) |
| printf("map %d..\n", exec->vtx.buffer_used); |
| } |
| |
| |
| |
| /** |
| * Execute the buffer and save copied verts. |
| * \param keep_unmapped if true, leave the VBO unmapped when we're done. |
| */ |
| void |
| vbo_exec_vtx_flush(struct vbo_exec_context *exec, GLboolean keepUnmapped) |
| { |
| if (0) |
| vbo_exec_debug_verts(exec); |
| |
| if (exec->vtx.prim_count && |
| exec->vtx.vert_count) { |
| |
| exec->vtx.copied.nr = vbo_copy_vertices(exec); |
| |
| if (exec->vtx.copied.nr != exec->vtx.vert_count) { |
| struct gl_context *ctx = exec->ctx; |
| |
| /* Before the update_state() as this may raise _NEW_VARYING_VP_INPUTS |
| * from _mesa_set_varying_vp_inputs(). |
| */ |
| vbo_exec_bind_arrays(ctx); |
| |
| if (ctx->NewState) |
| _mesa_update_state(ctx); |
| |
| vbo_exec_vtx_unmap(exec); |
| |
| assert(ctx->NewState == 0); |
| |
| if (0) |
| printf("%s %d %d\n", __func__, exec->vtx.prim_count, |
| exec->vtx.vert_count); |
| |
| ctx->Driver.Draw(ctx, exec->vtx.prim, exec->vtx.prim_count, |
| NULL, GL_TRUE, 0, exec->vtx.vert_count - 1, |
| NULL, 0, NULL); |
| |
| /* Get new storage -- unless asked not to. */ |
| if (!keepUnmapped) |
| vbo_exec_vtx_map(exec); |
| } |
| } |
| |
| /* May have to unmap explicitly if we didn't draw: |
| */ |
| if (keepUnmapped && exec->vtx.buffer_map) { |
| vbo_exec_vtx_unmap(exec); |
| } |
| |
| if (keepUnmapped || exec->vtx.vertex_size == 0) |
| exec->vtx.max_vert = 0; |
| else |
| exec->vtx.max_vert = vbo_compute_max_verts(exec); |
| |
| exec->vtx.buffer_ptr = exec->vtx.buffer_map; |
| exec->vtx.prim_count = 0; |
| exec->vtx.vert_count = 0; |
| } |