diff options
Diffstat (limited to 'src/mesa/state_tracker/st_draw_feedback.c')
-rw-r--r-- | src/mesa/state_tracker/st_draw_feedback.c | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_draw_feedback.c b/src/mesa/state_tracker/st_draw_feedback.c new file mode 100644 index 00000000000..834c3844c4f --- /dev/null +++ b/src/mesa/state_tracker/st_draw_feedback.c @@ -0,0 +1,262 @@ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * 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, sub license, 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 TUNGSTEN GRAPHICS AND/OR ITS 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/imports.h" +#include "main/image.h" +#include "main/macros.h" +#include "shader/prog_uniform.h" + +#include "vbo/vbo.h" + +#include "st_context.h" +#include "st_atom.h" +#include "st_cb_bufferobjects.h" +#include "st_draw.h" +#include "st_program.h" + +#include "pipe/p_context.h" +#include "pipe/p_defines.h" +#include "pipe/p_inlines.h" + +#include "draw/draw_private.h" +#include "draw/draw_context.h" + + +#if FEATURE_feedback || FEATURE_drawpix + +/** + * Set the (private) draw module's post-transformed vertex format when in + * GL_SELECT or GL_FEEDBACK mode or for glRasterPos. + */ +static void +set_feedback_vertex_format(GLcontext *ctx) +{ +#if 0 + struct st_context *st = ctx->st; + struct vertex_info vinfo; + GLuint i; + + memset(&vinfo, 0, sizeof(vinfo)); + + if (ctx->RenderMode == GL_SELECT) { + assert(ctx->RenderMode == GL_SELECT); + vinfo.num_attribs = 1; + vinfo.format[0] = FORMAT_4F; + vinfo.interp_mode[0] = INTERP_LINEAR; + } + else { + /* GL_FEEDBACK, or glRasterPos */ + /* emit all attribs (pos, color, texcoord) as GLfloat[4] */ + vinfo.num_attribs = st->state.vs->cso->state.num_outputs; + for (i = 0; i < vinfo.num_attribs; i++) { + vinfo.format[i] = FORMAT_4F; + vinfo.interp_mode[i] = INTERP_LINEAR; + } + } + + draw_set_vertex_info(st->draw, &vinfo); +#endif +} + + +/** + * Called by VBO to draw arrays when in selection or feedback mode and + * to implement glRasterPos. + * This is very much like the normal draw_vbo() function above. + * Look at code refactoring some day. + * Might move this into the failover module some day. + */ +void +st_feedback_draw_vbo(GLcontext *ctx, + const struct gl_client_array **arrays, + const struct _mesa_prim *prims, + GLuint nr_prims, + const struct _mesa_index_buffer *ib, + GLuint min_index, + GLuint max_index) +{ + struct st_context *st = ctx->st; + struct pipe_context *pipe = st->pipe; + struct draw_context *draw = st->draw; + const struct st_vertex_program *vp; + const struct pipe_shader_state *vs; + struct pipe_buffer *index_buffer_handle = 0; + struct pipe_vertex_buffer vbuffers[PIPE_MAX_SHADER_INPUTS]; + struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS]; + GLuint attr, i; + ubyte *mapped_constants; + + assert(draw); + + st_validate_state(ctx->st); + + /* must get these after state validation! */ + vp = ctx->st->vp; + vs = &st->vp->state; + + if (!st->vp->draw_shader) { + st->vp->draw_shader = draw_create_vertex_shader(draw, vs); + } + + /* + * Set up the draw module's state. + * + * We'd like to do this less frequently, but the normal state-update + * code sends state updates to the pipe, not to our private draw module. + */ + assert(draw); + draw_set_viewport_state(draw, &st->state.viewport); + draw_set_clip_state(draw, &st->state.clip); + draw_set_rasterizer_state(draw, &st->state.rasterizer); + draw_bind_vertex_shader(draw, st->vp->draw_shader); + set_feedback_vertex_format(ctx); + + /* loop over TGSI shader inputs to determine vertex buffer + * and attribute info + */ + for (attr = 0; attr < vp->num_inputs; attr++) { + const GLuint mesaAttr = vp->index_to_input[attr]; + struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj; + void *map; + + if (bufobj && bufobj->Name) { + /* Attribute data is in a VBO. + * Recall that for VBOs, the gl_client_array->Ptr field is + * really an offset from the start of the VBO, not a pointer. + */ + struct st_buffer_object *stobj = st_buffer_object(bufobj); + assert(stobj->buffer); + + vbuffers[attr].buffer = NULL; + pipe_buffer_reference(pipe->screen, &vbuffers[attr].buffer, stobj->buffer); + vbuffers[attr].buffer_offset = (unsigned) arrays[0]->Ptr;/* in bytes */ + velements[attr].src_offset = arrays[mesaAttr]->Ptr - arrays[0]->Ptr; + } + else { + /* attribute data is in user-space memory, not a VBO */ + uint bytes = (arrays[mesaAttr]->Size + * _mesa_sizeof_type(arrays[mesaAttr]->Type) + * (max_index + 1)); + + /* wrap user data */ + vbuffers[attr].buffer + = pipe_user_buffer_create(pipe->screen, (void *) arrays[mesaAttr]->Ptr, + bytes); + vbuffers[attr].buffer_offset = 0; + velements[attr].src_offset = 0; + } + + /* common-case setup */ + vbuffers[attr].pitch = arrays[mesaAttr]->StrideB; /* in bytes */ + vbuffers[attr].max_index = max_index; + velements[attr].vertex_buffer_index = attr; + velements[attr].nr_components = arrays[mesaAttr]->Size; + velements[attr].src_format = + st_pipe_vertex_format(arrays[mesaAttr]->Type, + arrays[mesaAttr]->Size, + arrays[mesaAttr]->Normalized); + assert(velements[attr].src_format); + + /* tell draw about this attribute */ +#if 0 + draw_set_vertex_buffer(draw, attr, &vbuffer[attr]); +#endif + + /* map the attrib buffer */ + map = pipe_buffer_map(pipe->screen, vbuffers[attr].buffer, + PIPE_BUFFER_USAGE_CPU_READ); + draw_set_mapped_vertex_buffer(draw, attr, map); + } + + draw_set_vertex_buffers(draw, vp->num_inputs, vbuffers); + draw_set_vertex_elements(draw, vp->num_inputs, velements); + + if (ib) { + unsigned indexSize; + struct gl_buffer_object *bufobj = ib->obj; + struct st_buffer_object *stobj = st_buffer_object(bufobj); + void *map; + + index_buffer_handle = stobj->buffer; + + switch (ib->type) { + case GL_UNSIGNED_INT: + indexSize = 4; + break; + case GL_UNSIGNED_SHORT: + indexSize = 2; + break; + default: + assert(0); + return; + } + + map = pipe_buffer_map(pipe->screen, index_buffer_handle, + PIPE_BUFFER_USAGE_CPU_READ); + draw_set_mapped_element_buffer(draw, indexSize, map); + } + else { + /* no index/element buffer */ + draw_set_mapped_element_buffer(draw, 0, NULL); + } + + + /* map constant buffers */ + mapped_constants = pipe_buffer_map(pipe->screen, + st->state.constants[PIPE_SHADER_VERTEX].buffer, + PIPE_BUFFER_USAGE_CPU_READ); + draw_set_mapped_constant_buffer(st->draw, mapped_constants, + st->state.constants[PIPE_SHADER_VERTEX].buffer->size); + + + /* draw here */ + for (i = 0; i < nr_prims; i++) { + draw_arrays(draw, prims[i].mode, prims[i].start, prims[i].count); + } + + + /* unmap constant buffers */ + pipe_buffer_unmap(pipe->screen, st->state.constants[PIPE_SHADER_VERTEX].buffer); + + /* + * unmap vertex/index buffers + */ + for (i = 0; i < PIPE_MAX_ATTRIBS; i++) { + if (draw->pt.vertex_buffer[i].buffer) { + pipe_buffer_unmap(pipe->screen, draw->pt.vertex_buffer[i].buffer); + pipe_buffer_reference(pipe->screen, &draw->pt.vertex_buffer[i].buffer, NULL); + draw_set_mapped_vertex_buffer(draw, i, NULL); + } + } + if (ib) { + pipe_buffer_unmap(pipe->screen, index_buffer_handle); + draw_set_mapped_element_buffer(draw, 0, NULL); + } +} + +#endif /* FEATURE_feedback || FEATURE_drawpix */ + |