#include "main/imports.h"
#include "main/image.h"
+#include "main/macros.h"
#include "vbo/vbo.h"
/**
* Examine the active arrays to determine if we have interleaved
- * vertex arrays living in one VBO.
+ * vertex arrays all living in one VBO, or all living in user space.
+ * \param userSpace returns whether the arrays are in user space.
*/
static GLboolean
is_interleaved_arrays(const struct st_vertex_program *vp,
- const struct gl_client_array **arrays)
+ const struct gl_client_array **arrays,
+ GLboolean *userSpace)
{
GLuint attr;
- struct gl_buffer_object *firstBufObj = NULL;
+ const struct gl_buffer_object *firstBufObj = NULL;
GLint firstStride = -1;
+ GLuint num_client_arrays = 0;
+ const GLubyte *client_addr = NULL;
for (attr = 0; attr < vp->num_inputs; attr++) {
const GLuint mesaAttr = vp->index_to_input[attr];
- struct gl_buffer_object *bufObj = arrays[mesaAttr]->BufferObj;
- GLsizei stride = arrays[mesaAttr]->StrideB;
+ const struct gl_buffer_object *bufObj = arrays[mesaAttr]->BufferObj;
+ const GLsizei stride = arrays[mesaAttr]->StrideB; /* in bytes */
- if (!bufObj || !bufObj->Name)
+ if (firstStride < 0) {
+ firstStride = stride;
+ }
+ else if (firstStride != stride) {
return GL_FALSE;
-
- if (!firstBufObj) {
+ }
+
+ if (!bufObj || !bufObj->Name) {
+ num_client_arrays++;
+ /* Try to detect if the client-space arrays are
+ * "close" to each other.
+ */
+ if (!client_addr) {
+ client_addr = arrays[mesaAttr]->Ptr;
+ }
+ else if (abs(arrays[mesaAttr]->Ptr - client_addr) > firstStride) {
+ /* arrays start too far apart */
+ return GL_FALSE;
+ }
+ }
+ else if (!firstBufObj) {
firstBufObj = bufObj;
- firstStride = stride;
}
- else if (bufObj != firstBufObj ||
- stride != firstStride) {
+ else if (bufObj != firstBufObj) {
return GL_FALSE;
}
}
+
+ *userSpace = (num_client_arrays == vp->num_inputs);
+ /*printf("user space: %d\n", (int) *userSpace);*/
+
return GL_TRUE;
}
/**
- * Set up for drawing interleaved arrays that all live in one VBO.
+ * Once we know all the arrays are in user space, this function
+ * computes the memory range occupied by the arrays.
+ */
+static void
+get_user_arrays_bounds(const struct st_vertex_program *vp,
+ const struct gl_client_array **arrays,
+ GLuint max_index,
+ const GLubyte **low, const GLubyte **high)
+{
+ const GLubyte *low_addr = NULL;
+ GLuint attr;
+ GLint stride;
+
+ for (attr = 0; attr < vp->num_inputs; attr++) {
+ const GLuint mesaAttr = vp->index_to_input[attr];
+ const GLubyte *start = arrays[mesaAttr]->Ptr;
+ stride = arrays[mesaAttr]->StrideB;
+ if (attr == 0) {
+ low_addr = start;
+ }
+ else {
+ low_addr = MIN2(low_addr, start);
+ }
+ }
+
+ *low = low_addr;
+ *high = low_addr + (max_index + 1) * stride;
+}
+
+
+/**
+ * Set up for drawing interleaved arrays that all live in one VBO
+ * or all live in user space.
+ * \param vbuffer returns vertex buffer info
+ * \param velements returns vertex element info
*/
static void
setup_interleaved_attribs(GLcontext *ctx,
const struct st_vertex_program *vp,
const struct gl_client_array **arrays,
GLuint max_index,
+ GLboolean userSpace,
struct pipe_vertex_buffer *vbuffer,
struct pipe_vertex_element velements[])
{
struct pipe_context *pipe = ctx->st->pipe;
- GLboolean buffer_init = GL_FALSE;
GLuint attr;
+ const GLubyte *offset0;
- /* 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;
struct st_buffer_object *stobj = st_buffer_object(bufobj);
GLsizei stride = arrays[mesaAttr]->StrideB;
- assert(stobj->buffer);
-
/*printf("stobj %u = %p\n", attr, (void*)stobj);*/
- if (!buffer_init) {
- vbuffer->buffer = NULL;
- pipe_reference_buffer(pipe, &vbuffer->buffer, stobj->buffer);
- vbuffer->buffer_offset = (unsigned) arrays[mesaAttr]->Ptr;
+ if (attr == 0) {
+ if (userSpace) {
+ const GLubyte *low, *high;
+ get_user_arrays_bounds(vp, arrays, max_index, &low, &high);
+ /*printf("user buffer range: %p %p %d\n", low, high, high-low);*/
+ vbuffer->buffer =
+ pipe_user_buffer_create(pipe, (void *) low, high - low);
+ vbuffer->buffer_offset = 0;
+ offset0 = low;
+ }
+ else {
+ vbuffer->buffer = NULL;
+ pipe_reference_buffer(pipe, &vbuffer->buffer, stobj->buffer);
+ vbuffer->buffer_offset = (unsigned) arrays[mesaAttr]->Ptr;
+ offset0 = arrays[mesaAttr]->Ptr;
+ }
vbuffer->pitch = stride; /* in bytes */
vbuffer->max_index = max_index;
- buffer_init = GL_TRUE;
}
velements[attr].src_offset =
- (unsigned) arrays[mesaAttr]->Ptr - vbuffer->buffer_offset;
+ (unsigned) (arrays[mesaAttr]->Ptr - offset0);
velements[attr].vertex_buffer_index = 0;
velements[attr].nr_components = arrays[mesaAttr]->Size;
- velements[attr].src_format
- = pipe_vertex_format(arrays[mesaAttr]->Type,
- arrays[mesaAttr]->Size,
- arrays[mesaAttr]->Normalized);
+ velements[attr].src_format =
+ pipe_vertex_format(arrays[mesaAttr]->Type,
+ arrays[mesaAttr]->Size,
+ arrays[mesaAttr]->Normalized);
assert(velements[attr].src_format);
}
}
/**
* Set up a separate pipe_vertex_buffer and pipe_vertex_element for each
* vertex attribute.
+ * \param vbuffer returns vertex buffer info
+ * \param velements returns vertex element info
*/
static void
setup_non_interleaved_attribs(GLcontext *ctx,
struct pipe_context *pipe = ctx->st->pipe;
GLuint attr;
- /* 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;
else {
/* attribute data is in user-space memory, not a VBO */
uint bytes;
- /*printf("user-space array %d\n", attr);*/
+ /*printf("user-space array %d stride %d\n", attr, stride);*/
/* wrap user data */
if (arrays[mesaAttr]->Ptr) {
/**
* This function gets plugged into the VBO module and is called when
* we have something to render.
- * Basically, translate the information into the format expected by pipe.
+ * Basically, translate the information into the format expected by gallium.
*/
void
st_draw_vbo(GLcontext *ctx,
GLuint attr;
struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
unsigned num_vbuffers, num_velements;
+ GLboolean userSpace;
/* sanity check for pointer arithmetic below */
assert(sizeof(arrays[0]->Ptr[0]) == 1);
/*
* Setup the vbuffer[] and velements[] arrays.
*/
- if (is_interleaved_arrays(vp, arrays)) {
+ if (is_interleaved_arrays(vp, arrays, &userSpace)) {
/*printf("Draw interleaved\n");*/
- setup_interleaved_attribs(ctx, vp, arrays, max_index,
+ setup_interleaved_attribs(ctx, vp, arrays, max_index, userSpace,
vbuffer, velements);
num_vbuffers = 1;
num_velements = vp->num_inputs;
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