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authorBrian Paul <brian.paul@tungstengraphics.com>2008-04-24 16:01:18 -0600
committerBrian Paul <brian.paul@tungstengraphics.com>2008-04-24 16:01:18 -0600
commitef683014dd72612e6eb245e89e754b033acb3a49 (patch)
tree58cec0c2fb9da0f56a5dac119026c8b03a3a3ed8 /src/mesa
parent98165318621cd3e01919b2b9ff140ce7a4e12beb (diff)
gallium: initial edgeflags code
Diffstat (limited to 'src/mesa')
-rw-r--r--src/mesa/state_tracker/st_draw.c60
1 files changed, 59 insertions, 1 deletions
diff --git a/src/mesa/state_tracker/st_draw.c b/src/mesa/state_tracker/st_draw.c
index befcb96bd8..097166f444 100644
--- a/src/mesa/state_tracker/st_draw.c
+++ b/src/mesa/state_tracker/st_draw.c
@@ -190,6 +190,57 @@ pipe_vertex_format(GLenum type, GLuint size, GLboolean normalized)
}
+/*
+ * If edge flags are needed, setup an bitvector of flags and call
+ * pipe->set_edgeflags().
+ * XXX memleak: need to free the returned pointer at some point
+ */
+static void *
+setup_edgeflags(GLcontext *ctx, GLenum primMode, GLint start, GLint count,
+ const struct gl_client_array *array)
+{
+ struct pipe_context *pipe = ctx->st->pipe;
+
+ if ((primMode == GL_TRIANGLES ||
+ primMode == GL_QUADS ||
+ primMode == GL_POLYGON) &&
+ (ctx->Polygon.FrontMode != GL_FILL ||
+ ctx->Polygon.BackMode != GL_FILL)) {
+ /* need edge flags */
+ GLuint i;
+ unsigned *vec = (unsigned *) calloc(sizeof(unsigned), (count + 31) / 32);
+ struct st_buffer_object *stobj = st_buffer_object(array->BufferObj);
+ ubyte *map;
+
+ if (!vec)
+ return NULL;
+
+ map = pipe->winsys->buffer_map(pipe->winsys, stobj->buffer,
+ PIPE_BUFFER_USAGE_CPU_READ);
+ map = ADD_POINTERS(map, array->Ptr);
+
+ for (i = 0; i < count; i++) {
+ if (*((float *) map))
+ vec[i/32] |= 1 << (i % 32);
+
+ map += array->StrideB;
+ }
+
+ pipe->winsys->buffer_unmap(pipe->winsys, stobj->buffer);
+
+ pipe->set_edgeflags(pipe, vec);
+
+ return vec;
+ }
+ else {
+ /* edge flags not needed */
+ pipe->set_edgeflags(pipe, NULL);
+ return NULL;
+ }
+}
+
+
+
/**
* This function gets plugged into the VBO module and is called when
* we have something to render.
@@ -277,7 +328,6 @@ st_draw_vbo(GLcontext *ctx,
pipe->set_vertex_buffers(pipe, vp->num_inputs, vbuffer);
pipe->set_vertex_elements(pipe, vp->num_inputs, velements);
-
/* do actual drawing */
if (ib) {
/* indexed primitive */
@@ -317,6 +367,10 @@ st_draw_vbo(GLcontext *ctx,
/* draw */
for (i = 0; i < nr_prims; i++) {
+ setup_edgeflags(ctx, prims[i].mode,
+ prims[i].start + indexOffset, prims[i].count,
+ arrays[VERT_ATTRIB_EDGEFLAG]);
+
pipe->draw_elements(pipe, indexBuf, indexSize,
prims[i].mode,
prims[i].start + indexOffset, prims[i].count);
@@ -328,6 +382,10 @@ st_draw_vbo(GLcontext *ctx,
/* non-indexed */
GLuint i;
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);
}
}