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authormarha <marha@users.sourceforge.net>2012-01-13 16:54:57 +0100
committermarha <marha@users.sourceforge.net>2012-01-13 16:54:57 +0100
commit5cfbe97cd797d8f78ece208bb5114704b83d8aab (patch)
tree5c88c73ee39367742bb5547ef6fb5a3d25d656e0 /mesalib/src/mesa/vbo/vbo_exec_array.c
parent39324211d7a79ef8115fd1e39771a2e400b31993 (diff)
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libxtrans libXdmcp libxcb mesa xserver git update 13 jan 2012
Diffstat (limited to 'mesalib/src/mesa/vbo/vbo_exec_array.c')
-rw-r--r--mesalib/src/mesa/vbo/vbo_exec_array.c53
1 files changed, 44 insertions, 9 deletions
diff --git a/mesalib/src/mesa/vbo/vbo_exec_array.c b/mesalib/src/mesa/vbo/vbo_exec_array.c
index fec49d35e..9861b21c9 100644
--- a/mesalib/src/mesa/vbo/vbo_exec_array.c
+++ b/mesalib/src/mesa/vbo/vbo_exec_array.c
@@ -99,24 +99,24 @@ vbo_sizeof_ib_type(GLenum type)
* If primitive restart is enabled, we need to ignore restart
* indexes when computing min/max.
*/
-void
+static void
vbo_get_minmax_index(struct gl_context *ctx,
const struct _mesa_prim *prim,
const struct _mesa_index_buffer *ib,
- GLuint *min_index, GLuint *max_index)
+ GLuint *min_index, GLuint *max_index,
+ const GLuint count)
{
const GLboolean restart = ctx->Array.PrimitiveRestart;
const GLuint restartIndex = ctx->Array.RestartIndex;
- const GLuint count = prim->count;
- const void *indices;
+ const int index_size = vbo_sizeof_ib_type(ib->type);
+ const char *indices;
GLuint i;
+ indices = (char *) ib->ptr + prim->start * index_size;
if (_mesa_is_bufferobj(ib->obj)) {
- indices = ctx->Driver.MapBufferRange(ctx, (GLsizeiptr) ib->ptr,
- count * vbo_sizeof_ib_type(ib->type),
- GL_MAP_READ_BIT, ib->obj);
- } else {
- indices = ib->ptr;
+ GLsizeiptr size = MIN2(count * index_size, ib->obj->Size);
+ indices = ctx->Driver.MapBufferRange(ctx, (GLintptr) indices, size,
+ GL_MAP_READ_BIT, ib->obj);
}
switch (ib->type) {
@@ -196,6 +196,41 @@ vbo_get_minmax_index(struct gl_context *ctx,
}
}
+/**
+ * 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);
+ }
+}
+
/**
* Check that element 'j' of the array has reasonable data.