1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
28 #include "main/imports.h"
29 #include "main/image.h"
30 #include "main/macros.h"
34 #include "st_context.h"
36 #include "st_cb_bufferobjects.h"
38 #include "st_program.h"
40 #include "pipe/p_context.h"
41 #include "pipe/p_defines.h"
42 #include "util/u_inlines.h"
44 #include "draw/draw_private.h"
45 #include "draw/draw_context.h"
49 * Set the (private) draw module's post-transformed vertex format when in
50 * GL_SELECT or GL_FEEDBACK mode or for glRasterPos.
53 set_feedback_vertex_format(struct gl_context *ctx)
56 struct st_context *st = st_context(ctx);
57 struct vertex_info vinfo;
60 memset(&vinfo, 0, sizeof(vinfo));
62 if (ctx->RenderMode == GL_SELECT) {
63 assert(ctx->RenderMode == GL_SELECT);
64 vinfo.num_attribs = 1;
65 vinfo.format[0] = FORMAT_4F;
66 vinfo.interp_mode[0] = INTERP_LINEAR;
69 /* GL_FEEDBACK, or glRasterPos */
70 /* emit all attribs (pos, color, texcoord) as GLfloat[4] */
71 vinfo.num_attribs = st->state.vs->cso->state.num_outputs;
72 for (i = 0; i < vinfo.num_attribs; i++) {
73 vinfo.format[i] = FORMAT_4F;
74 vinfo.interp_mode[i] = INTERP_LINEAR;
78 draw_set_vertex_info(st->draw, &vinfo);
84 * Called by VBO to draw arrays when in selection or feedback mode and
85 * to implement glRasterPos.
86 * This is very much like the normal draw_vbo() function above.
87 * Look at code refactoring some day.
90 st_feedback_draw_vbo(struct gl_context *ctx,
91 const struct _mesa_prim *prims,
93 const struct _mesa_index_buffer *ib,
94 GLboolean index_bounds_valid,
97 struct gl_transform_feedback_object *tfb_vertcount)
99 struct st_context *st = st_context(ctx);
100 struct pipe_context *pipe = st->pipe;
101 struct draw_context *draw = st->draw;
102 const struct st_vertex_program *vp;
103 const struct pipe_shader_state *vs;
104 struct pipe_vertex_buffer vbuffers[PIPE_MAX_SHADER_INPUTS];
105 struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
106 struct pipe_index_buffer ibuffer;
107 struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS] = {NULL};
108 struct pipe_transfer *ib_transfer = NULL;
109 const struct gl_client_array **arrays = ctx->Array._DrawArrays;
111 const GLubyte *low_addr = NULL;
112 const void *mapped_indices = NULL;
116 st_validate_state(st);
118 if (!index_bounds_valid)
119 vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index, nr_prims);
121 /* must get these after state validation! */
123 vs = &st->vp_variant->tgsi;
125 if (!st->vp_variant->draw_shader) {
126 st->vp_variant->draw_shader = draw_create_vertex_shader(draw, vs);
130 * Set up the draw module's state.
132 * We'd like to do this less frequently, but the normal state-update
133 * code sends state updates to the pipe, not to our private draw module.
136 draw_set_viewport_state(draw, &st->state.viewport);
137 draw_set_clip_state(draw, &st->state.clip);
138 draw_set_rasterizer_state(draw, &st->state.rasterizer, NULL);
139 draw_bind_vertex_shader(draw, st->vp_variant->draw_shader);
140 set_feedback_vertex_format(ctx);
142 /* Find the lowest address of the arrays we're drawing */
143 if (vp->num_inputs) {
144 low_addr = arrays[vp->index_to_input[0]]->Ptr;
146 for (attr = 1; attr < vp->num_inputs; attr++) {
147 const GLubyte *start = arrays[vp->index_to_input[attr]]->Ptr;
148 low_addr = MIN2(low_addr, start);
152 /* loop over TGSI shader inputs to determine vertex buffer
155 for (attr = 0; attr < vp->num_inputs; attr++) {
156 const GLuint mesaAttr = vp->index_to_input[attr];
157 struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
160 if (bufobj && bufobj->Name) {
161 /* Attribute data is in a VBO.
162 * Recall that for VBOs, the gl_client_array->Ptr field is
163 * really an offset from the start of the VBO, not a pointer.
165 struct st_buffer_object *stobj = st_buffer_object(bufobj);
166 assert(stobj->buffer);
168 vbuffers[attr].buffer = NULL;
169 vbuffers[attr].user_buffer = NULL;
170 pipe_resource_reference(&vbuffers[attr].buffer, stobj->buffer);
171 vbuffers[attr].buffer_offset = pointer_to_offset(low_addr);
172 velements[attr].src_offset = arrays[mesaAttr]->Ptr - low_addr;
174 /* map the attrib buffer */
175 map = pipe_buffer_map(pipe, vbuffers[attr].buffer,
178 draw_set_mapped_vertex_buffer(draw, attr, map,
179 vbuffers[attr].buffer->width0);
182 vbuffers[attr].buffer = NULL;
183 vbuffers[attr].user_buffer = arrays[mesaAttr]->Ptr;
184 vbuffers[attr].buffer_offset = 0;
185 velements[attr].src_offset = 0;
187 draw_set_mapped_vertex_buffer(draw, attr, vbuffers[attr].user_buffer,
191 /* common-case setup */
192 vbuffers[attr].stride = arrays[mesaAttr]->StrideB; /* in bytes */
193 velements[attr].instance_divisor = 0;
194 velements[attr].vertex_buffer_index = attr;
195 velements[attr].src_format =
196 st_pipe_vertex_format(arrays[mesaAttr]->Type,
197 arrays[mesaAttr]->Size,
198 arrays[mesaAttr]->Format,
199 arrays[mesaAttr]->Normalized,
200 arrays[mesaAttr]->Integer);
201 assert(velements[attr].src_format);
203 /* tell draw about this attribute */
205 draw_set_vertex_buffer(draw, attr, &vbuffer[attr]);
209 draw_set_vertex_buffers(draw, 0, vp->num_inputs, vbuffers);
210 draw_set_vertex_elements(draw, vp->num_inputs, velements);
212 memset(&ibuffer, 0, sizeof(ibuffer));
214 struct gl_buffer_object *bufobj = ib->obj;
216 ibuffer.index_size = vbo_sizeof_ib_type(ib->type);
217 if (ibuffer.index_size == 0)
218 goto out_unref_vertex;
220 if (bufobj && bufobj->Name) {
221 struct st_buffer_object *stobj = st_buffer_object(bufobj);
223 pipe_resource_reference(&ibuffer.buffer, stobj->buffer);
224 ibuffer.offset = pointer_to_offset(ib->ptr);
226 mapped_indices = pipe_buffer_map(pipe, stobj->buffer,
227 PIPE_TRANSFER_READ, &ib_transfer);
230 /* skip setting ibuffer.buffer as the draw module does not use it */
231 mapped_indices = ib->ptr;
234 draw_set_indexes(draw,
235 (ubyte *) mapped_indices + ibuffer.offset,
239 /* set the constant buffer */
240 draw_set_mapped_constant_buffer(st->draw, PIPE_SHADER_VERTEX, 0,
241 st->state.constants[PIPE_SHADER_VERTEX].ptr,
242 st->state.constants[PIPE_SHADER_VERTEX].size);
246 for (i = 0; i < nr_prims; i++) {
247 draw_arrays(draw, prims[i].mode, prims[i].start, prims[i].count);
252 * unmap vertex/index buffers
255 draw_set_indexes(draw, NULL, 0);
257 pipe_buffer_unmap(pipe, ib_transfer);
258 pipe_resource_reference(&ibuffer.buffer, NULL);
262 for (attr = 0; attr < vp->num_inputs; attr++) {
263 if (vb_transfer[attr])
264 pipe_buffer_unmap(pipe, vb_transfer[attr]);
265 draw_set_mapped_vertex_buffer(draw, attr, NULL, 0);
266 pipe_resource_reference(&vbuffers[attr].buffer, NULL);
268 draw_set_vertex_buffers(draw, 0, vp->num_inputs, NULL);