xserver and mesa git update 28-12-2010

1 files changed, 308 insertions, 0 deletions

diff --git a/mesalib/src/mesa/state_tracker/st_cb_feedback.c b/mesalib/src/mesa/state_tracker/st_cb_feedback.c
new file mode 100644
index 000000000..6717c4c7a
--- /dev/null
+++ b/mesalib/src/mesa/state_tracker/st_cb_feedback.c
@@ -0,0 +1,308 @@
+/**************************************************************************

+ * 

+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.

+ * All Rights Reserved.

+ * 

+ * Permission is hereby granted, free of charge, to any person obtaining a

+ * copy of this software and associated documentation files (the

+ * "Software"), to deal in the Software without restriction, including

+ * without limitation the rights to use, copy, modify, merge, publish,

+ * distribute, sub license, and/or sell copies of the Software, and to

+ * permit persons to whom the Software is furnished to do so, subject to

+ * the following conditions:

+ * 

+ * The above copyright notice and this permission notice (including the

+ * next paragraph) shall be included in all copies or substantial portions

+ * of the Software.

+ * 

+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.

+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR

+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

+ * 

+ **************************************************************************/

+

+/**

+ * GL_SELECT and GL_FEEDBACK render modes.

+ * Basically, we use a private instance of the 'draw' module for doing

+ * selection/feedback.  It would be nice to use the transform_feedback

+ * hardware feature, but it's defined as happening pre-clip and we want

+ * post-clipped primitives.  Also, there's concerns about the efficiency

+ * of using the hardware for this anyway.

+ *

+ * Authors:

+ *   Brian Paul

+ */

+

+#include "main/imports.h"

+#include "main/context.h"

+#include "main/feedback.h"

+

+#include "vbo/vbo.h"

+

+#include "st_context.h"

+#include "st_draw.h"

+#include "st_cb_feedback.h"

+

+#include "pipe/p_context.h"

+#include "pipe/p_defines.h"

+

+#include "draw/draw_context.h"

+#include "draw/draw_pipe.h"

+

+

+#if FEATURE_feedback

+

+/**

+ * This is actually used for both feedback and selection.

+ */

+struct feedback_stage

+{

+   struct draw_stage stage;   /**< Base class */

+   struct gl_context *ctx;            /**< Rendering context */

+   GLboolean reset_stipple_counter;

+};

+

+

+/**********************************************************************

+ * GL Feedback functions

+ **********************************************************************/

+

+static INLINE struct feedback_stage *

+feedback_stage( struct draw_stage *stage )

+{

+   return (struct feedback_stage *)stage;

+}

+

+

+static void

+feedback_vertex(struct gl_context *ctx, const struct draw_context *draw,

+                const struct vertex_header *v)

+{

+   const struct st_context *st = st_context(ctx);

+   GLfloat win[4];

+   const GLfloat *color, *texcoord;

+   GLuint slot;

+

+   /* Recall that Y=0=Top of window for Gallium wincoords */

+   win[0] = v->data[0][0];

+   win[1] = ctx->DrawBuffer->Height - v->data[0][1];

+   win[2] = v->data[0][2];

+   win[3] = 1.0F / v->data[0][3];

+

+   /* XXX

+    * When we compute vertex layout, save info about position of the

+    * color and texcoord attribs to use here.

+    */

+

+   slot = st->vertex_result_to_slot[VERT_RESULT_COL0];

+   if (slot != ~0U)

+      color = v->data[slot];

+   else

+      color = ctx->Current.Attrib[VERT_ATTRIB_COLOR0];

+

+   slot = st->vertex_result_to_slot[VERT_RESULT_TEX0];

+   if (slot != ~0U)

+      texcoord = v->data[slot];

+   else

+      texcoord = ctx->Current.Attrib[VERT_ATTRIB_TEX0];

+

+   _mesa_feedback_vertex(ctx, win, color, texcoord);

+}

+

+

+static void

+feedback_tri( struct draw_stage *stage, struct prim_header *prim )

+{

+   struct feedback_stage *fs = feedback_stage(stage);

+   struct draw_context *draw = stage->draw;

+   _mesa_feedback_token(fs->ctx, (GLfloat) GL_POLYGON_TOKEN);

+   _mesa_feedback_token(fs->ctx, (GLfloat) 3); /* three vertices */

+   feedback_vertex(fs->ctx, draw, prim->v[0]);

+   feedback_vertex(fs->ctx, draw, prim->v[1]);

+   feedback_vertex(fs->ctx, draw, prim->v[2]);

+}

+

+

+static void

+feedback_line( struct draw_stage *stage, struct prim_header *prim )

+{

+   struct feedback_stage *fs = feedback_stage(stage);

+   struct draw_context *draw = stage->draw;

+   if (fs->reset_stipple_counter) {

+      _mesa_feedback_token(fs->ctx, (GLfloat) GL_LINE_RESET_TOKEN);

+      fs->reset_stipple_counter = GL_FALSE;

+   }

+   else {

+      _mesa_feedback_token(fs->ctx, (GLfloat) GL_LINE_TOKEN);

+   }

+   feedback_vertex(fs->ctx, draw, prim->v[0]);

+   feedback_vertex(fs->ctx, draw, prim->v[1]);

+}

+

+

+static void

+feedback_point( struct draw_stage *stage, struct prim_header *prim )

+{

+   struct feedback_stage *fs = feedback_stage(stage);

+   struct draw_context *draw = stage->draw;

+   _mesa_feedback_token(fs->ctx, (GLfloat) GL_POINT_TOKEN);

+   feedback_vertex(fs->ctx, draw, prim->v[0]);

+}

+

+

+static void

+feedback_flush( struct draw_stage *stage, unsigned flags )

+{

+   /* no-op */

+}

+

+

+static void

+feedback_reset_stipple_counter( struct draw_stage *stage )

+{

+   struct feedback_stage *fs = feedback_stage(stage);

+   fs->reset_stipple_counter = GL_TRUE;

+}

+

+

+static void

+feedback_destroy( struct draw_stage *stage )

+{

+   /* no-op */

+}

+

+/**

+ * Create GL feedback drawing stage.

+ */

+static struct draw_stage *

+draw_glfeedback_stage(struct gl_context *ctx, struct draw_context *draw)

+{

+   struct feedback_stage *fs = ST_CALLOC_STRUCT(feedback_stage);

+

+   fs->stage.draw = draw;

+   fs->stage.next = NULL;

+   fs->stage.point = feedback_point;

+   fs->stage.line = feedback_line;

+   fs->stage.tri = feedback_tri;

+   fs->stage.flush = feedback_flush;

+   fs->stage.reset_stipple_counter = feedback_reset_stipple_counter;

+   fs->stage.destroy = feedback_destroy;

+   fs->ctx = ctx;

+

+   return &fs->stage;

+}

+

+

+

+/**********************************************************************

+ * GL Selection functions

+ **********************************************************************/

+

+static void

+select_tri( struct draw_stage *stage, struct prim_header *prim )

+{

+   struct feedback_stage *fs = feedback_stage(stage);

+   _mesa_update_hitflag( fs->ctx, prim->v[0]->data[0][2] );

+   _mesa_update_hitflag( fs->ctx, prim->v[1]->data[0][2] );

+   _mesa_update_hitflag( fs->ctx, prim->v[2]->data[0][2] );

+}

+

+static void

+select_line( struct draw_stage *stage, struct prim_header *prim )

+{

+   struct feedback_stage *fs = feedback_stage(stage);

+   _mesa_update_hitflag( fs->ctx, prim->v[0]->data[0][2] );

+   _mesa_update_hitflag( fs->ctx, prim->v[1]->data[0][2] );

+}

+

+

+static void

+select_point( struct draw_stage *stage, struct prim_header *prim )

+{

+   struct feedback_stage *fs = feedback_stage(stage);

+   _mesa_update_hitflag( fs->ctx, prim->v[0]->data[0][2] );

+}

+

+

+static void

+select_flush( struct draw_stage *stage, unsigned flags )

+{

+   /* no-op */

+}

+

+

+static void

+select_reset_stipple_counter( struct draw_stage *stage )

+{

+   /* no-op */

+}

+

+static void

+select_destroy( struct draw_stage *stage )

+{

+   /* no-op */

+}

+

+

+/**

+ * Create GL selection mode drawing stage.

+ */

+static struct draw_stage *

+draw_glselect_stage(struct gl_context *ctx, struct draw_context *draw)

+{

+   struct feedback_stage *fs = ST_CALLOC_STRUCT(feedback_stage);

+

+   fs->stage.draw = draw;

+   fs->stage.next = NULL;

+   fs->stage.point = select_point;

+   fs->stage.line = select_line;

+   fs->stage.tri = select_tri;

+   fs->stage.flush = select_flush;

+   fs->stage.reset_stipple_counter = select_reset_stipple_counter;

+   fs->stage.destroy = select_destroy;

+   fs->ctx = ctx;

+

+   return &fs->stage;

+}

+

+

+static void

+st_RenderMode(struct gl_context *ctx, GLenum newMode )

+{

+   struct st_context *st = st_context(ctx);

+   struct draw_context *draw = st->draw;

+

+   if (newMode == GL_RENDER) {

+      /* restore normal VBO draw function */

+      vbo_set_draw_func(ctx, st_draw_vbo);

+   }

+   else if (newMode == GL_SELECT) {

+      if (!st->selection_stage)

+         st->selection_stage = draw_glselect_stage(ctx, draw);

+      draw_set_rasterize_stage(draw, st->selection_stage);

+      /* Plug in new vbo draw function */

+      vbo_set_draw_func(ctx, st_feedback_draw_vbo);

+   }

+   else {

+      if (!st->feedback_stage)

+         st->feedback_stage = draw_glfeedback_stage(ctx, draw);

+      draw_set_rasterize_stage(draw, st->feedback_stage);

+      /* Plug in new vbo draw function */

+      vbo_set_draw_func(ctx, st_feedback_draw_vbo);

+      /* need to generate/use a vertex program that emits pos/color/tex */

+      st->dirty.st |= ST_NEW_VERTEX_PROGRAM;

+   }

+}

+

+

+

+void st_init_feedback_functions(struct dd_function_table *functions)

+{

+   functions->RenderMode = st_RenderMode;

+}

+

+#endif /* FEATURE_feedback */