xserver and mesa git update 28-12-2010

1 files changed, 563 insertions, 0 deletions

diff --git a/mesalib/src/mesa/state_tracker/st_cb_clear.c b/mesalib/src/mesa/state_tracker/st_cb_clear.c
new file mode 100644
index 000000000..7dd63798d
--- /dev/null
+++ b/mesalib/src/mesa/state_tracker/st_cb_clear.c
@@ -0,0 +1,563 @@
+/**************************************************************************

+ * 

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

+ * All Rights Reserved.

+ * Copyright 2009 VMware, Inc.  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.

+ * 

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

+

+ /*

+  * Authors:

+  *   Keith Whitwell <keith@tungstengraphics.com>

+  *   Brian Paul

+  *   Michel Dänzer

+  */

+

+#include "main/glheader.h"

+#include "main/formats.h"

+#include "main/macros.h"

+#include "program/prog_instruction.h"

+#include "st_context.h"

+#include "st_atom.h"

+#include "st_cb_accum.h"

+#include "st_cb_clear.h"

+#include "st_cb_fbo.h"

+#include "st_program.h"

+

+#include "pipe/p_context.h"

+#include "pipe/p_shader_tokens.h"

+#include "pipe/p_state.h"

+#include "pipe/p_defines.h"

+#include "util/u_format.h"

+#include "util/u_inlines.h"

+#include "util/u_simple_shaders.h"

+#include "util/u_draw_quad.h"

+

+#include "cso_cache/cso_context.h"

+

+

+/**

+ * Do per-context initialization for glClear.

+ */

+void

+st_init_clear(struct st_context *st)

+{

+   struct pipe_context *pipe = st->pipe;

+   struct pipe_screen *pscreen = st->pipe->screen;

+

+   memset(&st->clear, 0, sizeof(st->clear));

+

+   st->clear.raster.gl_rasterization_rules = 1;

+   st->clear.enable_ds_separate = pscreen->get_param(pscreen, PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE);

+

+   /* fragment shader state: color pass-through program */

+   st->clear.fs = util_make_fragment_passthrough_shader(pipe);

+

+   /* vertex shader state: color/position pass-through */

+   {

+      const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,

+                                      TGSI_SEMANTIC_COLOR };

+      const uint semantic_indexes[] = { 0, 0 };

+      st->clear.vs = util_make_vertex_passthrough_shader(pipe, 2,

+                                                         semantic_names,

+                                                         semantic_indexes);

+   }

+}

+

+

+/**

+ * Free per-context state for glClear.

+ */

+void

+st_destroy_clear(struct st_context *st)

+{

+   if (st->clear.fs) {

+      cso_delete_fragment_shader(st->cso_context, st->clear.fs);

+      st->clear.fs = NULL;

+   }

+   if (st->clear.vs) {

+      cso_delete_vertex_shader(st->cso_context, st->clear.vs);

+      st->clear.vs = NULL;

+   }

+   if (st->clear.vbuf) {

+      pipe_resource_reference(&st->clear.vbuf, NULL);

+      st->clear.vbuf = NULL;

+   }

+}

+

+

+/**

+ * Draw a screen-aligned quadrilateral.

+ * Coords are clip coords with y=0=bottom.

+ */

+static void

+draw_quad(struct st_context *st,

+          float x0, float y0, float x1, float y1, GLfloat z,

+          const GLfloat color[4])

+{

+   struct pipe_context *pipe = st->pipe;

+

+   /* XXX: Need to improve buffer_write to allow NO_WAIT (as well as

+    * no_flush) updates to buffers where we know there is no conflict

+    * with previous data.  Currently using max_slots > 1 will cause

+    * synchronous rendering if the driver flushes its command buffers

+    * between one bitmap and the next.  Our flush hook below isn't

+    * sufficient to catch this as the driver doesn't tell us when it

+    * flushes its own command buffers.  Until this gets fixed, pay the

+    * price of allocating a new buffer for each bitmap cache-flush to

+    * avoid synchronous rendering.

+    */

+   const GLuint max_slots = 1; /* 1024 / sizeof(st->clear.vertices); */

+   GLuint i;

+

+   if (st->clear.vbuf_slot >= max_slots) {

+      pipe_resource_reference(&st->clear.vbuf, NULL);

+      st->clear.vbuf_slot = 0;

+   }

+

+   if (!st->clear.vbuf) {

+      st->clear.vbuf = pipe_buffer_create(pipe->screen,

+                                          PIPE_BIND_VERTEX_BUFFER,

+                                          max_slots * sizeof(st->clear.vertices));

+   }

+

+   /* positions */

+   st->clear.vertices[0][0][0] = x0;

+   st->clear.vertices[0][0][1] = y0;

+

+   st->clear.vertices[1][0][0] = x1;

+   st->clear.vertices[1][0][1] = y0;

+

+   st->clear.vertices[2][0][0] = x1;

+   st->clear.vertices[2][0][1] = y1;

+

+   st->clear.vertices[3][0][0] = x0;

+   st->clear.vertices[3][0][1] = y1;

+

+   /* same for all verts: */

+   for (i = 0; i < 4; i++) {

+      st->clear.vertices[i][0][2] = z;

+      st->clear.vertices[i][0][3] = 1.0;

+      st->clear.vertices[i][1][0] = color[0];

+      st->clear.vertices[i][1][1] = color[1];

+      st->clear.vertices[i][1][2] = color[2];

+      st->clear.vertices[i][1][3] = color[3];

+   }

+

+   /* put vertex data into vbuf */

+   pipe_buffer_write_nooverlap(st->pipe, st->clear.vbuf,

+                                           st->clear.vbuf_slot

+                                             * sizeof(st->clear.vertices),

+                                           sizeof(st->clear.vertices),

+                                           st->clear.vertices);

+

+   /* draw */

+   util_draw_vertex_buffer(pipe, 

+                           st->clear.vbuf, 

+                           st->clear.vbuf_slot * sizeof(st->clear.vertices),

+                           PIPE_PRIM_TRIANGLE_FAN,

+                           4,  /* verts */

+                           2); /* attribs/vert */

+

+   /* Increment slot */

+   st->clear.vbuf_slot++;

+}

+

+

+

+/**

+ * Do glClear by drawing a quadrilateral.

+ * The vertices of the quad will be computed from the

+ * ctx->DrawBuffer->_X/Ymin/max fields.

+ */

+static void

+clear_with_quad(struct gl_context *ctx,

+                GLboolean color, GLboolean depth, GLboolean stencil)

+{

+   struct st_context *st = st_context(ctx);

+   const struct gl_framebuffer *fb = ctx->DrawBuffer;

+   const GLfloat fb_width = (GLfloat) fb->Width;

+   const GLfloat fb_height = (GLfloat) fb->Height;

+   const GLfloat x0 = (GLfloat) ctx->DrawBuffer->_Xmin / fb_width * 2.0f - 1.0f;

+   const GLfloat x1 = (GLfloat) ctx->DrawBuffer->_Xmax / fb_width * 2.0f - 1.0f;

+   const GLfloat y0 = (GLfloat) ctx->DrawBuffer->_Ymin / fb_height * 2.0f - 1.0f;

+   const GLfloat y1 = (GLfloat) ctx->DrawBuffer->_Ymax / fb_height * 2.0f - 1.0f;

+

+   /*

+   printf("%s %s%s%s %f,%f %f,%f\n", __FUNCTION__, 

+	  color ? "color, " : "",

+	  depth ? "depth, " : "",

+	  stencil ? "stencil" : "",

+	  x0, y0,

+	  x1, y1);

+   */

+

+   cso_save_blend(st->cso_context);

+   cso_save_stencil_ref(st->cso_context);

+   cso_save_depth_stencil_alpha(st->cso_context);

+   cso_save_rasterizer(st->cso_context);

+   cso_save_viewport(st->cso_context);

+   cso_save_clip(st->cso_context);

+   cso_save_fragment_shader(st->cso_context);

+   cso_save_vertex_shader(st->cso_context);

+   cso_save_vertex_elements(st->cso_context);

+

+   /* blend state: RGBA masking */

+   {

+      struct pipe_blend_state blend;

+      memset(&blend, 0, sizeof(blend));

+      blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;

+      blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;

+      blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;

+      blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;

+      if (color) {

+         if (ctx->Color.ColorMask[0][0])

+            blend.rt[0].colormask |= PIPE_MASK_R;

+         if (ctx->Color.ColorMask[0][1])

+            blend.rt[0].colormask |= PIPE_MASK_G;

+         if (ctx->Color.ColorMask[0][2])

+            blend.rt[0].colormask |= PIPE_MASK_B;

+         if (ctx->Color.ColorMask[0][3])

+            blend.rt[0].colormask |= PIPE_MASK_A;

+         if (st->ctx->Color.DitherFlag)

+            blend.dither = 1;

+      }

+      cso_set_blend(st->cso_context, &blend);

+   }

+

+   /* depth_stencil state: always pass/set to ref value */

+   {

+      struct pipe_depth_stencil_alpha_state depth_stencil;

+      memset(&depth_stencil, 0, sizeof(depth_stencil));

+      if (depth) {

+         depth_stencil.depth.enabled = 1;

+         depth_stencil.depth.writemask = 1;

+         depth_stencil.depth.func = PIPE_FUNC_ALWAYS;

+      }

+

+      if (stencil) {

+         struct pipe_stencil_ref stencil_ref;

+         memset(&stencil_ref, 0, sizeof(stencil_ref));

+         depth_stencil.stencil[0].enabled = 1;

+         depth_stencil.stencil[0].func = PIPE_FUNC_ALWAYS;

+         depth_stencil.stencil[0].fail_op = PIPE_STENCIL_OP_REPLACE;

+         depth_stencil.stencil[0].zpass_op = PIPE_STENCIL_OP_REPLACE;

+         depth_stencil.stencil[0].zfail_op = PIPE_STENCIL_OP_REPLACE;

+         depth_stencil.stencil[0].valuemask = 0xff;

+         depth_stencil.stencil[0].writemask = ctx->Stencil.WriteMask[0] & 0xff;

+         stencil_ref.ref_value[0] = ctx->Stencil.Clear;

+         cso_set_stencil_ref(st->cso_context, &stencil_ref);

+      }

+

+      cso_set_depth_stencil_alpha(st->cso_context, &depth_stencil);

+   }

+

+   cso_set_vertex_elements(st->cso_context, 2, st->velems_util_draw);

+

+   cso_set_rasterizer(st->cso_context, &st->clear.raster);

+

+   /* viewport state: viewport matching window dims */

+   {

+      const GLboolean invert = (st_fb_orientation(fb) == Y_0_TOP);

+      struct pipe_viewport_state vp;

+      vp.scale[0] = 0.5f * fb_width;

+      vp.scale[1] = fb_height * (invert ? -0.5f : 0.5f);

+      vp.scale[2] = 1.0f;

+      vp.scale[3] = 1.0f;

+      vp.translate[0] = 0.5f * fb_width;

+      vp.translate[1] = 0.5f * fb_height;

+      vp.translate[2] = 0.0f;

+      vp.translate[3] = 0.0f;

+      cso_set_viewport(st->cso_context, &vp);

+   }

+

+   cso_set_clip(st->cso_context, &st->clear.clip);

+   cso_set_fragment_shader_handle(st->cso_context, st->clear.fs);

+   cso_set_vertex_shader_handle(st->cso_context, st->clear.vs);

+

+   /* draw quad matching scissor rect (XXX verify coord round-off) */

+   draw_quad(st, x0, y0, x1, y1,

+             (GLfloat) ctx->Depth.Clear, ctx->Color.ClearColor);

+

+   /* Restore pipe state */

+   cso_restore_blend(st->cso_context);

+   cso_restore_stencil_ref(st->cso_context);

+   cso_restore_depth_stencil_alpha(st->cso_context);

+   cso_restore_rasterizer(st->cso_context);

+   cso_restore_viewport(st->cso_context);

+   cso_restore_clip(st->cso_context);

+   cso_restore_fragment_shader(st->cso_context);

+   cso_restore_vertex_shader(st->cso_context);

+   cso_restore_vertex_elements(st->cso_context);

+}

+

+

+/**

+ * Determine if we need to clear the depth buffer by drawing a quad.

+ */

+static INLINE GLboolean

+check_clear_color_with_quad(struct gl_context *ctx, struct gl_renderbuffer *rb)

+{

+   if (ctx->Scissor.Enabled &&

+       (ctx->Scissor.X != 0 ||

+        ctx->Scissor.Y != 0 ||

+        ctx->Scissor.Width < rb->Width ||

+        ctx->Scissor.Height < rb->Height))

+      return GL_TRUE;

+

+   if (!ctx->Color.ColorMask[0][0] ||

+       !ctx->Color.ColorMask[0][1] ||

+       !ctx->Color.ColorMask[0][2] ||

+       !ctx->Color.ColorMask[0][3])

+      return GL_TRUE;

+

+   return GL_FALSE;

+}

+

+

+/**

+ * Determine if we need to clear the combiend depth/stencil buffer by

+ * drawing a quad.

+ */

+static INLINE GLboolean

+check_clear_depth_stencil_with_quad(struct gl_context *ctx, struct gl_renderbuffer *rb)

+{

+   const GLuint stencilMax = 0xff;

+   GLboolean maskStencil

+      = (ctx->Stencil.WriteMask[0] & stencilMax) != stencilMax;

+

+   assert(rb->Format == MESA_FORMAT_S8 ||

+          rb->Format == MESA_FORMAT_Z24_S8 ||

+          rb->Format == MESA_FORMAT_S8_Z24);

+

+   if (ctx->Scissor.Enabled &&

+       (ctx->Scissor.X != 0 ||

+        ctx->Scissor.Y != 0 ||

+        ctx->Scissor.Width < rb->Width ||

+        ctx->Scissor.Height < rb->Height))

+      return GL_TRUE;

+

+   if (maskStencil)

+      return GL_TRUE;

+

+   return GL_FALSE;

+}

+

+

+/**

+ * Determine if we need to clear the depth buffer by drawing a quad.

+ */

+static INLINE GLboolean

+check_clear_depth_with_quad(struct gl_context *ctx, struct gl_renderbuffer *rb,

+                            boolean ds_separate)

+{

+   const struct st_renderbuffer *strb = st_renderbuffer(rb);

+   const GLboolean isDS = util_format_is_depth_and_stencil(strb->surface->format);

+

+   if (ctx->Scissor.Enabled &&

+       (ctx->Scissor.X != 0 ||

+        ctx->Scissor.Y != 0 ||

+        ctx->Scissor.Width < rb->Width ||

+        ctx->Scissor.Height < rb->Height))

+      return GL_TRUE;

+

+   if (!ds_separate && isDS && ctx->DrawBuffer->Visual.stencilBits > 0)

+      return GL_TRUE;

+

+   return GL_FALSE;

+}

+

+

+/**

+ * Determine if we need to clear the stencil buffer by drawing a quad.

+ */

+static INLINE GLboolean

+check_clear_stencil_with_quad(struct gl_context *ctx, struct gl_renderbuffer *rb,

+                              boolean ds_separate)

+{

+   const struct st_renderbuffer *strb = st_renderbuffer(rb);

+   const GLboolean isDS = util_format_is_depth_and_stencil(strb->surface->format);

+   const GLuint stencilMax = 0xff;

+   const GLboolean maskStencil

+      = (ctx->Stencil.WriteMask[0] & stencilMax) != stencilMax;

+

+   assert(rb->Format == MESA_FORMAT_S8 ||

+          rb->Format == MESA_FORMAT_Z24_S8 ||

+          rb->Format == MESA_FORMAT_S8_Z24);

+

+   if (maskStencil) 

+      return GL_TRUE;

+

+   if (ctx->Scissor.Enabled &&

+       (ctx->Scissor.X != 0 ||

+        ctx->Scissor.Y != 0 ||

+        ctx->Scissor.Width < rb->Width ||

+        ctx->Scissor.Height < rb->Height))

+      return GL_TRUE;

+

+   /* This is correct, but it is necessary to look at the depth clear

+    * value held in the surface when it comes time to issue the clear,

+    * rather than taking depth and stencil clear values from the

+    * current state.

+    */

+   if (!ds_separate && isDS && ctx->DrawBuffer->Visual.depthBits > 0)

+      return GL_TRUE;

+

+   return GL_FALSE;

+}

+

+

+

+/**

+ * Called when we need to flush.

+ */

+void

+st_flush_clear(struct st_context *st)

+{

+   /* Release vertex buffer to avoid synchronous rendering if we were

+    * to map it in the next frame.

+    */

+   pipe_resource_reference(&st->clear.vbuf, NULL);

+   st->clear.vbuf_slot = 0;

+}

+ 

+

+

+/**

+ * Called via ctx->Driver.Clear()

+ */

+static void

+st_Clear(struct gl_context *ctx, GLbitfield mask)

+{

+   static const GLbitfield BUFFER_BITS_DS

+      = (BUFFER_BIT_DEPTH | BUFFER_BIT_STENCIL);

+   struct st_context *st = st_context(ctx);

+   struct gl_renderbuffer *depthRb

+      = ctx->DrawBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;

+   struct gl_renderbuffer *stencilRb

+      = ctx->DrawBuffer->Attachment[BUFFER_STENCIL].Renderbuffer;

+   GLbitfield quad_buffers = 0x0;

+   GLbitfield clear_buffers = 0x0;

+   GLuint i;

+

+   /* This makes sure the pipe has the latest scissor, etc values */

+   st_validate_state( st );

+

+   if (mask & BUFFER_BITS_COLOR) {

+      for (i = 0; i < ctx->DrawBuffer->_NumColorDrawBuffers; i++) {

+         GLuint b = ctx->DrawBuffer->_ColorDrawBufferIndexes[i];

+

+         if (mask & (1 << b)) {

+            struct gl_renderbuffer *rb

+               = ctx->DrawBuffer->Attachment[b].Renderbuffer;

+            struct st_renderbuffer *strb;

+

+            assert(rb);

+

+            strb = st_renderbuffer(rb);

+

+            if (!strb->surface)

+               continue;

+

+            if (check_clear_color_with_quad( ctx, rb ))

+               quad_buffers |= PIPE_CLEAR_COLOR;

+            else

+               clear_buffers |= PIPE_CLEAR_COLOR;

+         }

+      }

+   }

+

+   if ((mask & BUFFER_BITS_DS) == BUFFER_BITS_DS && depthRb == stencilRb) {

+      /* clearing combined depth + stencil */

+      struct st_renderbuffer *strb = st_renderbuffer(depthRb);

+

+      if (strb->surface) {

+         if (check_clear_depth_stencil_with_quad(ctx, depthRb))

+            quad_buffers |= PIPE_CLEAR_DEPTHSTENCIL;

+         else

+            clear_buffers |= PIPE_CLEAR_DEPTHSTENCIL;

+      }

+   }

+   else {

+      /* separate depth/stencil clears */

+      /* I don't think truly separate buffers are actually possible in gallium or hw? */

+      if (mask & BUFFER_BIT_DEPTH) {

+         struct st_renderbuffer *strb = st_renderbuffer(depthRb);

+

+         if (strb->surface) {

+            if (check_clear_depth_with_quad(ctx, depthRb,

+                                            st->clear.enable_ds_separate))

+               quad_buffers |= PIPE_CLEAR_DEPTH;

+            else

+               clear_buffers |= PIPE_CLEAR_DEPTH;

+         }

+      }

+      if (mask & BUFFER_BIT_STENCIL) {

+         struct st_renderbuffer *strb = st_renderbuffer(stencilRb);

+

+         if (strb->surface) {

+            if (check_clear_stencil_with_quad(ctx, stencilRb,

+                                              st->clear.enable_ds_separate))

+               quad_buffers |= PIPE_CLEAR_STENCIL;

+            else

+               clear_buffers |= PIPE_CLEAR_STENCIL;

+         }

+      }

+   }

+

+   /*

+    * If we're going to use clear_with_quad() for any reason, use it for

+    * everything possible.

+    */

+   if (quad_buffers) {

+      quad_buffers |= clear_buffers;

+      clear_with_quad(ctx,

+                      quad_buffers & PIPE_CLEAR_COLOR,

+                      quad_buffers & PIPE_CLEAR_DEPTH,

+                      quad_buffers & PIPE_CLEAR_STENCIL);

+   } else if (clear_buffers) {

+      /* driver cannot know it can clear everything if the buffer

+       * is a combined depth/stencil buffer but this wasn't actually

+       * required from the visual. Hence fix this up to avoid potential

+       * read-modify-write in the driver.

+       */

+      if ((clear_buffers & PIPE_CLEAR_DEPTHSTENCIL) &&

+          ((clear_buffers & PIPE_CLEAR_DEPTHSTENCIL) != PIPE_CLEAR_DEPTHSTENCIL) &&

+          (depthRb == stencilRb) &&

+          (ctx->DrawBuffer->Visual.depthBits == 0 ||

+           ctx->DrawBuffer->Visual.stencilBits == 0))

+         clear_buffers |= PIPE_CLEAR_DEPTHSTENCIL;

+      st->pipe->clear(st->pipe, clear_buffers, ctx->Color.ClearColor,

+                      ctx->Depth.Clear, ctx->Stencil.Clear);

+   }

+   if (mask & BUFFER_BIT_ACCUM)

+      st_clear_accum_buffer(ctx,

+                            ctx->DrawBuffer->Attachment[BUFFER_ACCUM].Renderbuffer);

+}

+

+

+void

+st_init_clear_functions(struct dd_function_table *functions)

+{

+   functions->Clear = st_Clear;

+}