**************************************************************************/
#include "util/u_memory.h"
+#include "util/u_math.h"
#include "pipe/p_context.h"
#include "draw/draw_context.h"
#include "draw/draw_private.h"
#include "draw/draw_pt.h"
+
+#define DO_CLIP_XY 0x1
+#define DO_CLIP_FULL_Z 0x2
+#define DO_CLIP_HALF_Z 0x4
+#define DO_CLIP_USER 0x8
+#define DO_VIEWPORT 0x10
+#define DO_EDGEFLAG 0x20
+
+
struct pt_post_vs {
struct draw_context *draw;
+ unsigned flags;
+
boolean (*run)( struct pt_post_vs *pvs,
struct draw_vertex_info *info );
};
-
+static INLINE void
+initialize_vertex_header(struct vertex_header *header)
+{
+ header->clipmask = 0;
+ header->edgeflag = 1;
+ header->pad = 0;
+ header->vertex_id = UNDEFINED_VERTEX_ID;
+}
static INLINE float
dot4(const float *a, const float *b)
a[3]*b[3]);
}
+#define FLAGS (0)
+#define TAG(x) x##_none
+#include "draw_cliptest_tmp.h"
+#define FLAGS (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_VIEWPORT)
+#define TAG(x) x##_xy_fullz_viewport
+#include "draw_cliptest_tmp.h"
-static INLINE unsigned
-compute_clipmask_gl(const float *clip, /*const*/ float plane[][4], unsigned nr)
-{
- unsigned mask = 0x0;
- unsigned i;
+#define FLAGS (DO_CLIP_XY | DO_CLIP_HALF_Z | DO_VIEWPORT)
+#define TAG(x) x##_xy_halfz_viewport
+#include "draw_cliptest_tmp.h"
-#if 0
- debug_printf("compute clipmask %f %f %f %f\n",
- clip[0], clip[1], clip[2], clip[3]);
- assert(clip[3] != 0.0);
-#endif
+#define FLAGS (DO_CLIP_FULL_Z | DO_VIEWPORT)
+#define TAG(x) x##_fullz_viewport
+#include "draw_cliptest_tmp.h"
- /* Do the hardwired planes first:
- */
- if (-clip[0] + clip[3] < 0) mask |= (1<<0);
- if ( clip[0] + clip[3] < 0) mask |= (1<<1);
- if (-clip[1] + clip[3] < 0) mask |= (1<<2);
- if ( clip[1] + clip[3] < 0) mask |= (1<<3);
- if ( clip[2] + clip[3] < 0) mask |= (1<<4); /* match mesa clipplane numbering - for now */
- if (-clip[2] + clip[3] < 0) mask |= (1<<5); /* match mesa clipplane numbering - for now */
-
- /* Followed by any remaining ones:
- */
- for (i = 6; i < nr; i++) {
- if (dot4(clip, plane[i]) < 0)
- mask |= (1<<i);
- }
+#define FLAGS (DO_CLIP_HALF_Z | DO_VIEWPORT)
+#define TAG(x) x##_halfz_viewport
+#include "draw_cliptest_tmp.h"
- return mask;
-}
+#define FLAGS (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER | DO_VIEWPORT)
+#define TAG(x) x##_xy_fullz_user_viewport
+#include "draw_cliptest_tmp.h"
+#define FLAGS (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER | DO_VIEWPORT | DO_EDGEFLAG)
+#define TAG(x) x##_xy_fullz_user_viewport_edgeflag
+#include "draw_cliptest_tmp.h"
-/* The normal case - cliptest, rhw divide, viewport transform.
- *
- * Also handle identity viewport here at the expense of a few wasted
- * instructions
- */
-static boolean post_vs_cliptest_viewport_gl( struct pt_post_vs *pvs,
- struct draw_vertex_info *info )
-{
- struct vertex_header *out = info->verts;
- const float *scale = pvs->draw->viewport.scale;
- const float *trans = pvs->draw->viewport.translate;
- const unsigned pos = draw_current_shader_position_output(pvs->draw);
- unsigned clipped = 0;
- unsigned j;
-
- if (0) debug_printf("%s count, %d\n", __FUNCTION__, info->count);
-
- for (j = 0; j < info->count; j++) {
- float *position = out->data[pos];
-
-#if 0
- debug_printf("%d) io = %p, data = %p = [%f, %f, %f, %f]\n",
- j, out, position, position[0], position[1], position[2], position[3]);
-#endif
-
- out->clip[0] = position[0];
- out->clip[1] = position[1];
- out->clip[2] = position[2];
- out->clip[3] = position[3];
-
- out->vertex_id = 0xffff;
- out->clipmask = compute_clipmask_gl(out->clip,
- pvs->draw->plane,
- pvs->draw->nr_planes);
- clipped += out->clipmask;
-
- if (out->clipmask == 0)
- {
- /* divide by w */
- float w = 1.0f / position[3];
-
- /* Viewport mapping */
- position[0] = position[0] * w * scale[0] + trans[0];
- position[1] = position[1] * w * scale[1] + trans[1];
- position[2] = position[2] * w * scale[2] + trans[2];
- position[3] = w;
-#if 0
- debug_printf("post viewport: %f %f %f %f\n",
- position[0],
- position[1],
- position[2],
- position[3]);
-#endif
- }
-
- out = (struct vertex_header *)( (char *)out + info->stride );
- }
-
- return clipped != 0;
-}
-
-/* As above plus edgeflags
+/* Don't want to create 64 versions of this function, so catch the
+ * less common ones here. This is looking like something which should
+ * be code-generated, perhaps appended to the end of the vertex
+ * shader.
*/
-static boolean
-post_vs_cliptest_viewport_gl_edgeflag(struct pt_post_vs *pvs,
- struct draw_vertex_info *info)
-{
- unsigned j;
- boolean needpipe;
+#define FLAGS (pvs->flags)
+#define TAG(x) x##_generic
+#include "draw_cliptest_tmp.h"
- needpipe = post_vs_cliptest_viewport_gl(pvs, info);
- /* If present, copy edgeflag VS output into vertex header.
- * Otherwise, leave header as is.
- */
- if (pvs->draw->vs.edgeflag_output) {
- struct vertex_header *out = info->verts;
- int ef = pvs->draw->vs.edgeflag_output;
-
- for (j = 0; j < info->count; j++) {
- const float *edgeflag = out->data[ef];
- out->edgeflag = !(edgeflag[0] != 1.0f);
- needpipe |= !out->edgeflag;
- out = (struct vertex_header *)( (char *)out + info->stride );
- }
- }
- return needpipe;
-}
-
-
-
-
-/* If bypass_clipping is set, skip cliptest and rhw divide.
- */
-static boolean post_vs_viewport( struct pt_post_vs *pvs,
- struct draw_vertex_info *info )
-{
- struct vertex_header *out = info->verts;
- const float *scale = pvs->draw->viewport.scale;
- const float *trans = pvs->draw->viewport.translate;
- const unsigned pos = draw_current_shader_position_output(pvs->draw);
- unsigned j;
-
- if (0) debug_printf("%s\n", __FUNCTION__);
- for (j = 0; j < info->count; j++) {
- float *position = out->data[pos];
-
- /* Viewport mapping only, no cliptest/rhw divide
- */
- position[0] = position[0] * scale[0] + trans[0];
- position[1] = position[1] * scale[1] + trans[1];
- position[2] = position[2] * scale[2] + trans[2];
-
- out = (struct vertex_header *)((char *)out + info->stride);
- }
-
- return FALSE;
-}
-
-
-/* If bypass_clipping is set and we have an identity viewport, nothing
- * to do.
- */
-static boolean post_vs_none( struct pt_post_vs *pvs,
- struct draw_vertex_info *info )
-{
- if (0) debug_printf("%s\n", __FUNCTION__);
- return FALSE;
-}
boolean draw_pt_post_vs_run( struct pt_post_vs *pvs,
struct draw_vertex_info *info )
void draw_pt_post_vs_prepare( struct pt_post_vs *pvs,
- boolean bypass_clipping,
+ boolean clip_xy,
+ boolean clip_z,
+ boolean clip_user,
boolean bypass_viewport,
boolean opengl,
boolean need_edgeflags )
{
- if (!need_edgeflags) {
- if (bypass_clipping) {
- if (bypass_viewport)
- pvs->run = post_vs_none;
- else
- pvs->run = post_vs_viewport;
- }
- else {
- /* if (opengl) */
- pvs->run = post_vs_cliptest_viewport_gl;
- }
+ pvs->flags = 0;
+
+ if (clip_xy)
+ pvs->flags |= DO_CLIP_XY;
+
+ if (clip_z && opengl) {
+ pvs->flags |= DO_CLIP_FULL_Z;
+ ASSIGN_4V( pvs->draw->plane[4], 0, 0, 1, 1 );
+ }
+
+ if (clip_z && !opengl) {
+ pvs->flags |= DO_CLIP_HALF_Z;
+ ASSIGN_4V( pvs->draw->plane[4], 0, 0, 1, 0 );
}
- else {
- /* If we need to copy edgeflags to the vertex header, it should
- * mean we're running the primitive pipeline. Hence the bypass
- * flags should be false.
- */
- assert(!bypass_clipping);
- assert(!bypass_viewport);
- pvs->run = post_vs_cliptest_viewport_gl_edgeflag;
+
+ if (clip_user)
+ pvs->flags |= DO_CLIP_USER;
+
+ if (!bypass_viewport)
+ pvs->flags |= DO_VIEWPORT;
+
+ if (need_edgeflags)
+ pvs->flags |= DO_EDGEFLAG;
+
+ /* Now select the relevant function:
+ */
+ switch (pvs->flags) {
+ case 0:
+ pvs->run = do_cliptest_none;
+ break;
+
+ case DO_CLIP_XY | DO_CLIP_FULL_Z | DO_VIEWPORT:
+ pvs->run = do_cliptest_xy_fullz_viewport;
+ break;
+
+ case DO_CLIP_XY | DO_CLIP_HALF_Z | DO_VIEWPORT:
+ pvs->run = do_cliptest_xy_halfz_viewport;
+ break;
+
+ case DO_CLIP_FULL_Z | DO_VIEWPORT:
+ pvs->run = do_cliptest_fullz_viewport;
+ break;
+
+ case DO_CLIP_HALF_Z | DO_VIEWPORT:
+ pvs->run = do_cliptest_halfz_viewport;
+ break;
+
+ case DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER | DO_VIEWPORT:
+ pvs->run = do_cliptest_xy_fullz_user_viewport;
+ break;
+
+ case (DO_CLIP_XY | DO_CLIP_FULL_Z | DO_CLIP_USER |
+ DO_VIEWPORT | DO_EDGEFLAG):
+ pvs->run = do_cliptest_xy_fullz_user_viewport_edgeflag;
+ break;
+
+ default:
+ pvs->run = do_cliptest_generic;
+ break;
}
}
projects / mesa.git / blobdiff