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 **************************************************************************/
29 * This file implements the st_draw_vbo() function which is called from
30 * Mesa's VBO module. All point/line/triangle rendering is done through
31 * this function whether the user called glBegin/End, glDrawArrays,
32 * glDrawElements, glEvalMesh, or glCalList, etc.
35 * Keith Whitwell <keith@tungstengraphics.com>
39 #include "main/imports.h"
40 #include "main/image.h"
41 #include "main/bufferobj.h"
42 #include "main/macros.h"
46 #include "st_context.h"
48 #include "st_cb_bufferobjects.h"
49 #include "st_cb_xformfb.h"
52 #include "st_program.h"
54 #include "pipe/p_context.h"
55 #include "pipe/p_defines.h"
56 #include "util/u_inlines.h"
57 #include "util/u_format.h"
58 #include "util/u_prim.h"
59 #include "util/u_draw_quad.h"
60 #include "util/u_upload_mgr.h"
61 #include "draw/draw_context.h"
62 #include "cso_cache/cso_context.h"
64 #include "../glsl/ir_uniform.h"
68 * This is very similar to vbo_all_varyings_in_vbos() but we are
69 * only interested in per-vertex data. See bug 38626.
72 all_varyings_in_vbos(const struct gl_client_array *arrays[])
76 for (i = 0; i < VERT_ATTRIB_MAX; i++)
77 if (arrays[i]->StrideB &&
78 !arrays[i]->InstanceDivisor &&
79 !_mesa_is_bufferobj(arrays[i]->BufferObj))
87 * Basically, translate Mesa's index buffer information into
88 * a pipe_index_buffer object.
89 * \return TRUE or FALSE for success/failure
92 setup_index_buffer(struct st_context *st,
93 const struct _mesa_index_buffer *ib,
94 struct pipe_index_buffer *ibuffer)
96 struct gl_buffer_object *bufobj = ib->obj;
98 ibuffer->index_size = vbo_sizeof_ib_type(ib->type);
100 /* get/create the index buffer object */
101 if (_mesa_is_bufferobj(bufobj)) {
102 /* indices are in a real VBO */
103 ibuffer->buffer = st_buffer_object(bufobj)->buffer;
104 ibuffer->offset = pointer_to_offset(ib->ptr);
106 else if (st->indexbuf_uploader) {
107 if (u_upload_data(st->indexbuf_uploader, 0,
108 ib->count * ibuffer->index_size, ib->ptr,
109 &ibuffer->offset, &ibuffer->buffer) != PIPE_OK) {
113 u_upload_unmap(st->indexbuf_uploader);
116 /* indices are in user space memory */
117 ibuffer->user_buffer = ib->ptr;
120 cso_set_index_buffer(st->cso_context, ibuffer);
126 * Prior to drawing, check that any uniforms referenced by the
127 * current shader have been set. If a uniform has not been set,
131 check_uniforms(struct gl_context *ctx)
133 struct gl_shader_program *shProg[3] = {
134 ctx->Shader.CurrentVertexProgram,
135 ctx->Shader.CurrentGeometryProgram,
136 ctx->Shader.CurrentFragmentProgram,
140 for (j = 0; j < 3; j++) {
143 if (shProg[j] == NULL || !shProg[j]->LinkStatus)
146 for (i = 0; i < shProg[j]->NumUserUniformStorage; i++) {
147 const struct gl_uniform_storage *u = &shProg[j]->UniformStorage[i];
148 if (!u->initialized) {
150 "Using shader with uninitialized uniform: %s",
159 * Translate OpenGL primtive type (GL_POINTS, GL_TRIANGLE_STRIP, etc) to
160 * the corresponding Gallium type.
163 translate_prim(const struct gl_context *ctx, unsigned prim)
165 /* GL prims should match Gallium prims, spot-check a few */
166 STATIC_ASSERT(GL_POINTS == PIPE_PRIM_POINTS);
167 STATIC_ASSERT(GL_QUADS == PIPE_PRIM_QUADS);
168 STATIC_ASSERT(GL_TRIANGLE_STRIP_ADJACENCY == PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY);
170 /* Avoid quadstrips if it's easy to do so:
171 * Note: it's important to do the correct trimming if we change the
172 * prim type! We do that wherever this function is called.
174 if (prim == GL_QUAD_STRIP &&
175 ctx->Light.ShadeModel != GL_FLAT &&
176 ctx->Polygon.FrontMode == GL_FILL &&
177 ctx->Polygon.BackMode == GL_FILL)
178 prim = GL_TRIANGLE_STRIP;
185 * This function gets plugged into the VBO module and is called when
186 * we have something to render.
187 * Basically, translate the information into the format expected by gallium.
190 st_draw_vbo(struct gl_context *ctx,
191 const struct _mesa_prim *prims,
193 const struct _mesa_index_buffer *ib,
194 GLboolean index_bounds_valid,
197 struct gl_transform_feedback_object *tfb_vertcount)
199 struct st_context *st = st_context(ctx);
200 struct pipe_index_buffer ibuffer = {0};
201 struct pipe_draw_info info;
202 const struct gl_client_array **arrays = ctx->Array._DrawArrays;
205 /* Mesa core state should have been validated already */
206 assert(ctx->NewState == 0x0);
208 /* Validate state. */
209 if (st->dirty.st || ctx->NewDriverState) {
210 st_validate_state(st);
212 if (st->vertex_array_out_of_memory)
216 if (MESA_VERBOSE & VERBOSE_GLSL) {
220 (void) check_uniforms;
224 util_draw_init_info(&info);
226 /* Get index bounds for user buffers. */
227 if (!index_bounds_valid)
228 if (!all_varyings_in_vbos(arrays))
229 vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index,
232 if (!setup_index_buffer(st, ib, &ibuffer)) {
233 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBegin/DrawElements/DrawArray");
238 if (min_index != ~0 && max_index != ~0) {
239 info.min_index = min_index;
240 info.max_index = max_index;
243 /* The VBO module handles restart for the non-indexed GLDrawArrays
244 * so we only set these fields for indexed drawing:
246 info.primitive_restart = ctx->Array._PrimitiveRestart;
247 info.restart_index = ctx->Array._RestartIndex;
250 /* Transform feedback drawing is always non-indexed. */
251 /* Set info.count_from_stream_output. */
253 st_transform_feedback_draw_init(tfb_vertcount, &info);
257 /* do actual drawing */
258 for (i = 0; i < nr_prims; i++) {
259 info.mode = translate_prim( ctx, prims[i].mode );
260 info.start = prims[i].start;
261 info.count = prims[i].count;
262 info.start_instance = prims[i].base_instance;
263 info.instance_count = prims[i].num_instances;
264 info.index_bias = prims[i].basevertex;
266 info.min_index = info.start;
267 info.max_index = info.start + info.count - 1;
270 if (ST_DEBUG & DEBUG_DRAW) {
271 debug_printf("st/draw: mode %s start %u count %u indexed %d\n",
272 u_prim_name(info.mode),
278 if (info.count_from_stream_output) {
279 cso_draw_vbo(st->cso_context, &info);
281 else if (info.primitive_restart) {
282 /* don't trim, restarts might be inside index list */
283 cso_draw_vbo(st->cso_context, &info);
285 else if (u_trim_pipe_prim(prims[i].mode, &info.count))
286 cso_draw_vbo(st->cso_context, &info);
289 if (ib && st->indexbuf_uploader && !_mesa_is_bufferobj(ib->obj)) {
290 pipe_resource_reference(&ibuffer.buffer, NULL);
296 st_init_draw(struct st_context *st)
298 struct gl_context *ctx = st->ctx;
300 vbo_set_draw_func(ctx, st_draw_vbo);
302 st->draw = draw_create(st->pipe); /* for selection/feedback */
304 /* Disable draw options that might convert points/lines to tris, etc.
305 * as that would foul-up feedback/selection mode.
307 draw_wide_line_threshold(st->draw, 1000.0f);
308 draw_wide_point_threshold(st->draw, 1000.0f);
309 draw_enable_line_stipple(st->draw, FALSE);
310 draw_enable_point_sprites(st->draw, FALSE);
315 st_destroy_draw(struct st_context *st)
317 draw_destroy(st->draw);