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-rw-r--r--src/mesa/state_tracker/st_draw.c29
1 files changed, 26 insertions, 3 deletions
diff --git a/src/mesa/state_tracker/st_draw.c b/src/mesa/state_tracker/st_draw.c
index ec9c859fcb..47330d8efd 100644
--- a/src/mesa/state_tracker/st_draw.c
+++ b/src/mesa/state_tracker/st_draw.c
@@ -528,6 +528,20 @@ check_uniforms(GLcontext *ctx)
}
+static unsigned translate_prim( GLcontext *ctx,
+ unsigned prim )
+{
+ /* Avoid quadstrips if it's easy to do so:
+ */
+ if (prim == GL_QUAD_STRIP &&
+ ctx->Light.ShadeModel != GL_FLAT &&
+ ctx->Polygon.FrontMode == GL_FILL &&
+ ctx->Polygon.BackMode == GL_FILL)
+ prim = GL_TRIANGLE_STRIP;
+
+ return prim;
+}
+
/**
* This function gets plugged into the VBO module and is called when
* we have something to render.
@@ -624,6 +638,7 @@ st_draw_vbo(GLcontext *ctx,
struct gl_buffer_object *bufobj = ib->obj;
struct pipe_buffer *indexBuf = NULL;
unsigned indexSize, indexOffset, i;
+ unsigned prim;
switch (ib->type) {
case GL_UNSIGNED_INT:
@@ -666,10 +681,12 @@ st_draw_vbo(GLcontext *ctx,
prims[i].start + indexOffset, prims[i].count,
arrays[VERT_ATTRIB_EDGEFLAG]);
+ prim = translate_prim( ctx, prims[i].mode );
+
pipe->draw_range_elements(pipe, indexBuf, indexSize,
min_index,
max_index,
- prims[i].mode,
+ prim,
prims[i].start + indexOffset, prims[i].count);
}
else {
@@ -677,9 +694,11 @@ st_draw_vbo(GLcontext *ctx,
setup_edgeflags(ctx, prims[i].mode,
prims[i].start + indexOffset, prims[i].count,
arrays[VERT_ATTRIB_EDGEFLAG]);
+
+ prim = translate_prim( ctx, prims[i].mode );
pipe->draw_elements(pipe, indexBuf, indexSize,
- prims[i].mode,
+ prim,
prims[i].start + indexOffset, prims[i].count);
}
}
@@ -689,12 +708,16 @@ st_draw_vbo(GLcontext *ctx,
else {
/* non-indexed */
GLuint i;
+ GLuint prim;
+
for (i = 0; i < nr_prims; i++) {
setup_edgeflags(ctx, prims[i].mode,
prims[i].start, prims[i].count,
arrays[VERT_ATTRIB_EDGEFLAG]);
- pipe->draw_arrays(pipe, prims[i].mode, prims[i].start, prims[i].count);
+ prim = translate_prim( ctx, prims[i].mode );
+
+ pipe->draw_arrays(pipe, prim, prims[i].start, prims[i].count);
}
}