/**
* Compute min and max elements for nr_prims
*/
void
vbo_get_minmax_indices(struct gl_context *ctx,
const struct _mesa_prim *prims,
const struct _mesa_index_buffer *ib,
GLuint *min_index,
GLuint *max_index,
GLuint nr_prims)
{
GLuint tmp_min, tmp_max;
GLuint i;
GLuint count;
*min_index = ~0;
*max_index = 0;
for (i = 0; i < nr_prims; i++) {
const struct _mesa_prim *start_prim;
start_prim = &prims[i];
count = start_prim->count;
/* Do combination if possible to reduce map/unmap count */
while ((i + 1 < nr_prims) &&
(prims[i].start + prims[i].count == prims[i+1].start)) {
count += prims[i+1].count;
i++;
}
vbo_get_minmax_index(ctx, start_prim, ib, &tmp_min, &tmp_max, count);
*min_index = MIN2(*min_index, tmp_min);
*max_index = MAX2(*max_index, tmp_max);
}
}
/**
* Do bounds checking on array element indexes. Check that the vertices
* pointed to by the indices don't lie outside buffer object bounds.
* \return GL_TRUE if OK, GL_FALSE if any indexed vertex goes is out of bounds
*/
static GLboolean
check_index_bounds(struct gl_context *ctx, GLsizei count, GLenum type,
const GLvoid *indices, GLint basevertex)
{
struct _mesa_prim prim;
struct _mesa_index_buffer ib;
GLuint min, max;
/* Only the X Server needs to do this -- otherwise, accessing outside
* array/BO bounds allows application termination.
*/
if (!ctx->Const.CheckArrayBounds)
return GL_TRUE;
memset(&prim, 0, sizeof(prim));
prim.count = count;
memset(&ib, 0, sizeof(ib));
ib.type = type;
ib.ptr = indices;
ib.obj = ctx->Array.ElementArrayBufferObj;
vbo_get_minmax_index(ctx, &prim, &ib, &min, &max);
if ((int)(min + basevertex) < 0 ||
max + basevertex > ctx->Array.ArrayObj->_MaxElement) {
/* the max element is out of bounds of one or more enabled arrays */
_mesa_warning(ctx, "glDrawElements() index=%u is out of bounds (max=%u)",
max, ctx->Array.ArrayObj->_MaxElement);
return GL_FALSE;
}
return GL_TRUE;
}
static void r300DrawPrims(GLcontext *ctx,
const struct gl_client_array *arrays[],
const struct _mesa_prim *prim,
GLuint nr_prims,
const struct _mesa_index_buffer *ib,
GLboolean index_bounds_valid,
GLuint min_index,
GLuint max_index)
{
GLboolean retval;
/* This check should get folded into just the places that
* min/max index are really needed.
*/
if (!index_bounds_valid) {
vbo_get_minmax_index(ctx, prim, ib, &min_index, &max_index);
}
if (min_index) {
radeon_print(RADEON_FALLBACKS, RADEON_IMPORTANT,
"%s: Rebasing primitives. %p nr_prims %d min_index %u max_index %u\n",
__func__, prim, nr_prims, min_index, max_index);
vbo_rebase_prims( ctx, arrays, prim, nr_prims, ib, min_index, max_index, r300DrawPrims );
return;
}
/* Make an attempt at drawing */
retval = r300TryDrawPrims(ctx, arrays, prim, nr_prims, ib, min_index, max_index);
/* If failed run tnl pipeline - it should take care of fallbacks */
if (!retval)
_tnl_draw_prims(ctx, arrays, prim, nr_prims, ib, min_index, max_index);
}
void _tnl_vbo_draw_prims(struct gl_context *ctx,
const struct gl_client_array *arrays[],
const struct _mesa_prim *prim,
GLuint nr_prims,
const struct _mesa_index_buffer *ib,
GLboolean index_bounds_valid,
GLuint min_index,
GLuint max_index)
{
if (!index_bounds_valid)
vbo_get_minmax_index(ctx, prim, ib, &min_index, &max_index);
_tnl_draw_prims(ctx, arrays, prim, nr_prims, ib, min_index, max_index);
}
void brw_draw_prims( struct gl_context *ctx,
const struct gl_client_array *arrays[],
const struct _mesa_prim *prim,
GLuint nr_prims,
const struct _mesa_index_buffer *ib,
GLboolean index_bounds_valid,
GLuint min_index,
GLuint max_index )
{
GLboolean retval;
if (!_mesa_check_conditional_render(ctx))
return;
if (!vbo_all_varyings_in_vbos(arrays)) {
if (!index_bounds_valid)
vbo_get_minmax_index(ctx, prim, ib, &min_index, &max_index);
/* Decide if we want to rebase. If so we end up recursing once
* only into this function.
*/
if (min_index != 0 && !vbo_any_varyings_in_vbos(arrays)) {
vbo_rebase_prims(ctx, arrays,
prim, nr_prims,
ib, min_index, max_index,
brw_draw_prims );
return;
}
}
/* Make a first attempt at drawing:
*/
retval = brw_try_draw_prims(ctx, arrays, prim, nr_prims, ib, min_index, max_index);
/* Otherwise, we really are out of memory. Pass the drawing
* command to the software tnl module and which will in turn call
* swrast to do the drawing.
*/
if (!retval) {
_swsetup_Wakeup(ctx);
_tnl_wakeup(ctx);
_tnl_draw_prims(ctx, arrays, prim, nr_prims, ib, min_index, max_index);
}
}
static void evergreenDrawPrims(GLcontext *ctx,
const struct gl_client_array *arrays[],
const struct _mesa_prim *prim,
GLuint nr_prims,
const struct _mesa_index_buffer *ib,
GLboolean index_bounds_valid,
GLuint min_index,
GLuint max_index)
{
GLboolean retval = GL_FALSE;
context_t *context = EVERGREEN_CONTEXT(ctx);
radeonContextPtr radeon = &context->radeon;
radeon_prepare_render(radeon);
/* This check should get folded into just the places that
* min/max index are really needed.
*/
if (!vbo_all_varyings_in_vbos(arrays)) {
if (!index_bounds_valid)
vbo_get_minmax_index(ctx, prim, ib, &min_index, &max_index);
/* do we want to rebase, minimizes the
* amount of data to upload? */
if (min_index) {
vbo_rebase_prims( ctx, arrays, prim, nr_prims, ib, min_index, max_index, evergreenDrawPrims );
return;
}
}
/* Make an attempt at drawing */
retval = evergreenTryDrawPrims(ctx, arrays, prim, nr_prims, ib, min_index, max_index);
/* If failed run tnl pipeline - it should take care of fallbacks */
if (!retval) {
_swsetup_Wakeup(ctx);
_tnl_draw_prims(ctx, arrays, prim, nr_prims, ib, min_index, max_index);
}
}
/**
* 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,
GLboolean index_bounds_valid,
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);
if (!index_bounds_valid)
vbo_get_minmax_index(ctx, prims, ib, &min_index, &max_index);
/* 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(&vbuffers[attr].buffer, stobj->buffer);
vbuffers[attr].buffer_offset = pointer_to_offset(arrays[0]->Ptr);
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].stride = 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]->Format,
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) {
struct gl_buffer_object *bufobj = ib->obj;
unsigned indexSize;
void *map;
switch (ib->type) {
case GL_UNSIGNED_INT:
indexSize = 4;
break;
case GL_UNSIGNED_SHORT:
indexSize = 2;
break;
default:
assert(0);
return;
}
if (bufobj && bufobj->Name) {
struct st_buffer_object *stobj = st_buffer_object(bufobj);
index_buffer_handle = stobj->buffer;
map = pipe_buffer_map(pipe->screen, index_buffer_handle,
PIPE_BUFFER_USAGE_CPU_READ);
draw_set_mapped_element_buffer(draw, indexSize, map);
}
else {
draw_set_mapped_element_buffer(draw, indexSize, (void *) ib->ptr);
}
}
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(&draw->pt.vertex_buffer[i].buffer, NULL);
draw_set_mapped_vertex_buffer(draw, i, NULL);
}
}
if (index_buffer_handle) {
pipe_buffer_unmap(pipe->screen, index_buffer_handle);
draw_set_mapped_element_buffer(draw, 0, NULL);
}
}