| /* |
| * 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/glheader.h" |
| #include "main/bufferobj.h" |
| #include "main/context.h" |
| #include "main/enums.h" |
| #include "main/state.h" |
| #include "main/vtxfmt.h" |
| |
| #include "vbo_context.h" |
| #include "vbo_noop.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: |
| assert(0); |
| 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 vbo_exec_context *exec = &vbo->exec; |
| struct gl_vertex_array *arrays = exec->vtx.arrays; |
| const GLubyte *map; |
| GLuint attr; |
| GLbitfield varying_inputs = 0x0; |
| bool swap_pos = false; |
| |
| /* Install the default (ie Current) attributes first */ |
| for (attr = 0; attr < VERT_ATTRIB_FF_MAX; attr++) { |
| exec->vtx.inputs[attr] = &vbo->currval[VBO_ATTRIB_POS+attr]; |
| } |
| |
| /* Overlay other active attributes */ |
| switch (get_program_mode(exec->ctx)) { |
| case VP_NONE: |
| for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) { |
| assert(VERT_ATTRIB_GENERIC(attr) < ARRAY_SIZE(exec->vtx.inputs)); |
| exec->vtx.inputs[VERT_ATTRIB_GENERIC(attr)] = |
| &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT+attr]; |
| } |
| map = vbo->map_vp_none; |
| break; |
| case VP_ARB: |
| for (attr = 0; attr < VERT_ATTRIB_GENERIC_MAX; attr++) { |
| assert(VERT_ATTRIB_GENERIC(attr) < ARRAY_SIZE(exec->vtx.inputs)); |
| exec->vtx.inputs[VERT_ATTRIB_GENERIC(attr)] = |
| &vbo->currval[VBO_ATTRIB_GENERIC0+attr]; |
| } |
| map = vbo->map_vp_arb; |
| |
| /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read. |
| * In that case we effectively need to route the data from |
| * glVertexAttrib(0, val) calls to feed into the GENERIC0 input. |
| * The original state gets essentially restored below. |
| */ |
| const GLbitfield64 inputs_read = |
| ctx->VertexProgram._Current->info.inputs_read; |
| if ((inputs_read & VERT_BIT_POS) == 0 && |
| (inputs_read & VERT_BIT_GENERIC0)) { |
| swap_pos = true; |
| exec->vtx.inputs[VERT_ATTRIB_GENERIC0] = exec->vtx.inputs[0]; |
| exec->vtx.attrsz[VERT_ATTRIB_GENERIC0] = exec->vtx.attrsz[0]; |
| exec->vtx.attrtype[VERT_ATTRIB_GENERIC0] = exec->vtx.attrtype[0]; |
| exec->vtx.attrptr[VERT_ATTRIB_GENERIC0] = exec->vtx.attrptr[0]; |
| exec->vtx.attrsz[0] = 0; |
| } |
| break; |
| default: |
| assert(0); |
| } |
| |
| for (attr = 0; attr < VERT_ATTRIB_MAX ; attr++) { |
| const GLuint src = map[attr]; |
| |
| if (exec->vtx.attrsz[src]) { |
| GLsizeiptr offset = (GLbyte *)exec->vtx.attrptr[src] - |
| (GLbyte *)exec->vtx.vertex; |
| |
| /* override the default array set above */ |
| assert(attr < ARRAY_SIZE(exec->vtx.inputs)); |
| assert(attr < ARRAY_SIZE(exec->vtx.arrays)); /* arrays[] */ |
| exec->vtx.inputs[attr] = &arrays[attr]; |
| |
| if (_mesa_is_bufferobj(exec->vtx.bufferobj)) { |
| /* a real buffer obj: Ptr is an offset, not a pointer */ |
| assert(exec->vtx.bufferobj->Mappings[MAP_INTERNAL].Pointer); |
| assert(offset >= 0); |
| arrays[attr].Ptr = (GLubyte *) |
| exec->vtx.bufferobj->Mappings[MAP_INTERNAL].Offset + offset; |
| } |
| else { |
| /* Ptr into ordinary app memory */ |
| arrays[attr].Ptr = (GLubyte *)exec->vtx.buffer_map + offset; |
| } |
| arrays[attr].Size = exec->vtx.attrsz[src]; |
| arrays[attr].StrideB = exec->vtx.vertex_size * sizeof(GLfloat); |
| arrays[attr].Type = exec->vtx.attrtype[src]; |
| arrays[attr].Integer = |
| vbo_attrtype_to_integer_flag(exec->vtx.attrtype[src]); |
| arrays[attr].Format = GL_RGBA; |
| arrays[attr]._ElementSize = arrays[attr].Size * sizeof(GLfloat); |
| _mesa_reference_buffer_object(ctx, |
| &arrays[attr].BufferObj, |
| exec->vtx.bufferobj); |
| |
| varying_inputs |= VERT_BIT(attr); |
| } |
| } |
| |
| /* In case we swapped the position and generic0 attribute. |
| * Restore the original setting of the vtx.* variables. |
| * They are still needed with the original order and settings in case |
| * of a split primitive. |
| */ |
| if (swap_pos) { |
| exec->vtx.attrsz[0] = exec->vtx.attrsz[VERT_ATTRIB_GENERIC0]; |
| exec->vtx.attrsz[VERT_ATTRIB_GENERIC0] = 0; |
| } |
| |
| _mesa_set_varying_vp_inputs(ctx, varying_inputs); |
| ctx->NewDriverState |= ctx->DriverFlags.NewArray; |
| } |
| |
| |
| /** |
| * 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); |
| |
| if (0) |
| printf("%s %d %d\n", __func__, exec->vtx.prim_count, |
| exec->vtx.vert_count); |
| |
| vbo_context(ctx)->draw_prims(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; |
| } |
