1 files changed, 325 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_framebuffer.c b/src/mesa/state_tracker/st_framebuffer.c
new file mode 100644
index 0000000000..ea22a94303
--- /dev/null
+++ b/src/mesa/state_tracker/st_framebuffer.c
@@ -0,0 +1,325 @@
+/**************************************************************************
+ * 
+ * Copyright 2003 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.
+ * 
+ **************************************************************************/
+
+
+#include "main/imports.h"
+#include "main/buffers.h"
+#include "main/context.h"
+#include "main/framebuffer.h"
+#include "main/matrix.h"
+#include "main/renderbuffer.h"
+#include "main/scissor.h"
+#include "st_public.h"
+#include "st_context.h"
+#include "st_cb_fbo.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_context.h"
+#include "pipe/p_inlines.h"
+
+
+struct st_framebuffer *
+st_create_framebuffer( const __GLcontextModes *visual,
+                       enum pipe_format colorFormat,
+                       enum pipe_format depthFormat,
+                       enum pipe_format stencilFormat,
+                       uint width, uint height,
+                       void *private)
+{
+   struct st_framebuffer *stfb = CALLOC_STRUCT(st_framebuffer);
+   if (stfb) {
+      int samples = st_get_msaa();
+
+      if (visual->sampleBuffers)
+         samples = visual->samples;
+
+      _mesa_initialize_framebuffer(&stfb->Base, visual);
+
+      {
+         /* fake frontbuffer */
+         /* XXX allocation should only happen in the unusual case
+            it's actually needed */
+         struct gl_renderbuffer *rb
+            = st_new_renderbuffer_fb(colorFormat, samples);
+         _mesa_add_renderbuffer(&stfb->Base, BUFFER_FRONT_LEFT, rb);
+      }
+
+      if (visual->doubleBufferMode) {
+         struct gl_renderbuffer *rb
+            = st_new_renderbuffer_fb(colorFormat, samples);
+         _mesa_add_renderbuffer(&stfb->Base, BUFFER_BACK_LEFT, rb);
+      }
+
+      if (depthFormat == stencilFormat && depthFormat != PIPE_FORMAT_NONE) {
+         /* combined depth/stencil buffer */
+         struct gl_renderbuffer *depthStencilRb
+            = st_new_renderbuffer_fb(depthFormat, samples);
+         /* note: bind RB to two attachment points */
+         _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthStencilRb);
+         _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, depthStencilRb);
+      }
+      else {
+         /* separate depth and/or stencil */
+
+         if (visual->depthBits == 32) {
+            /* 32-bit depth buffer */
+            struct gl_renderbuffer *depthRb
+               = st_new_renderbuffer_fb(depthFormat, samples);
+            _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb);
+         }
+         else if (visual->depthBits == 24) {
+            /* 24-bit depth buffer, ignore stencil bits */
+            struct gl_renderbuffer *depthRb
+               = st_new_renderbuffer_fb(depthFormat, samples);
+            _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb);
+         }
+         else if (visual->depthBits > 0) {
+            /* 16-bit depth buffer */
+            struct gl_renderbuffer *depthRb
+               = st_new_renderbuffer_fb(depthFormat, samples);
+            _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb);
+         }
+
+         if (visual->stencilBits > 0) {
+            /* 8-bit stencil */
+            struct gl_renderbuffer *stencilRb
+               = st_new_renderbuffer_fb(stencilFormat, samples);
+            _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, stencilRb);
+         }
+      }
+
+      if (visual->accumRedBits > 0) {
+         /* 16-bit/channel accum */
+         struct gl_renderbuffer *accumRb
+            = st_new_renderbuffer_fb(DEFAULT_ACCUM_PIPE_FORMAT, 0); /* XXX accum isn't multisampled right? */
+         _mesa_add_renderbuffer(&stfb->Base, BUFFER_ACCUM, accumRb);
+      }
+
+      stfb->Base.Initialized = GL_TRUE;
+      stfb->InitWidth = width;
+      stfb->InitHeight = height;
+      stfb->Private = private;
+   }
+   return stfb;
+}
+
+
+void st_resize_framebuffer( struct st_framebuffer *stfb,
+                            uint width, uint height )
+{
+   if (stfb->Base.Width != width || stfb->Base.Height != height) {
+      GET_CURRENT_CONTEXT(ctx);
+      if (ctx) {
+         if (stfb->InitWidth == 0 && stfb->InitHeight == 0) {
+            /* didn't have a valid size until now */
+            stfb->InitWidth = width;
+            stfb->InitHeight = height;
+            if (ctx->Viewport.Width <= 1) {
+               /* set context's initial viewport/scissor size */
+               _mesa_set_viewport(ctx, 0, 0, width, height);
+               _mesa_set_scissor(ctx, 0, 0, width, height);
+            }
+         }
+
+         _mesa_resize_framebuffer(ctx, &stfb->Base, width, height);
+
+         assert(stfb->Base.Width == width);
+         assert(stfb->Base.Height == height);
+      }
+   }
+}
+
+
+void st_unreference_framebuffer( struct st_framebuffer *stfb )
+{
+   _mesa_unreference_framebuffer((struct gl_framebuffer **) &stfb);
+}
+
+
+
+/**
+ * Set/replace a framebuffer surface.
+ * The user of the state tracker can use this instead of
+ * st_resize_framebuffer() to provide new surfaces when a window is resized.
+ */
+void
+st_set_framebuffer_surface(struct st_framebuffer *stfb,
+                           uint surfIndex, struct pipe_surface *surf)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   static const GLuint invalid_size = 9999999;
+   struct st_renderbuffer *strb;
+   GLuint width, height, i;
+
+   assert(surfIndex < BUFFER_COUNT);
+
+   strb = st_renderbuffer(stfb->Base.Attachment[surfIndex].Renderbuffer);
+
+   /* fail */
+   if (!strb) return;
+
+   /* replace the renderbuffer's surface/texture pointers */
+   pipe_surface_reference( &strb->surface, surf );
+   pipe_texture_reference( &strb->texture, surf->texture );
+
+   if (ctx) {
+      /* If ctx isn't set, we've likely not made current yet.
+       * But when we do, we need to start setting this dirty bit
+       * to ensure the renderbuffer attachements are up-to-date
+       * via update_framebuffer.
+       */
+      ctx->st->dirty.st |= ST_NEW_FRAMEBUFFER;
+   }
+
+   /* update renderbuffer's width/height */
+   strb->Base.Width = surf->width;
+   strb->Base.Height = surf->height;
+
+   /* Try to update the framebuffer's width/height from the renderbuffer
+    * sizes.  Before we start drawing, all the rbs _should_ be the same size.
+    */
+   width = height = invalid_size;
+   for (i = 0; i < BUFFER_COUNT; i++) {
+      if (stfb->Base.Attachment[i].Renderbuffer) {
+         if (width == invalid_size) {
+            width = stfb->Base.Attachment[i].Renderbuffer->Width;
+            height = stfb->Base.Attachment[i].Renderbuffer->Height;
+         }
+         else if (width != stfb->Base.Attachment[i].Renderbuffer->Width ||
+                  height != stfb->Base.Attachment[i].Renderbuffer->Height) {
+            /* inconsistant renderbuffer sizes, bail out */
+            return;
+         }
+      }
+   }
+
+   if (width != invalid_size) {
+      /* OK, the renderbuffers are of a consistant size, so update the
+       * parent framebuffer's size.
+       */
+      stfb->Base.Width = width;
+      stfb->Base.Height = height;
+   }
+}
+
+
+
+/**
+ * Return the pipe_surface for the given renderbuffer.
+ */
+struct pipe_surface *
+st_get_framebuffer_surface(struct st_framebuffer *stfb, uint surfIndex)
+{
+   struct st_renderbuffer *strb;
+
+   assert(surfIndex <= ST_SURFACE_DEPTH);
+
+   /* sanity checks, ST tokens should match Mesa tokens */
+   assert(ST_SURFACE_FRONT_LEFT == BUFFER_FRONT_LEFT);
+   assert(ST_SURFACE_BACK_RIGHT == BUFFER_BACK_RIGHT);
+
+   strb = st_renderbuffer(stfb->Base.Attachment[surfIndex].Renderbuffer);
+   if (strb)
+      return strb->surface;
+   return NULL;
+}
+
+struct pipe_texture *
+st_get_framebuffer_texture(struct st_framebuffer *stfb, uint surfIndex)
+{
+   struct st_renderbuffer *strb;
+
+   assert(surfIndex <= ST_SURFACE_DEPTH);
+
+   /* sanity checks, ST tokens should match Mesa tokens */
+   assert(ST_SURFACE_FRONT_LEFT == BUFFER_FRONT_LEFT);
+   assert(ST_SURFACE_BACK_RIGHT == BUFFER_BACK_RIGHT);
+
+   strb = st_renderbuffer(stfb->Base.Attachment[surfIndex].Renderbuffer);
+   if (strb)
+      return strb->texture;
+   return NULL;
+}
+
+/**
+ * This function is to be called prior to SwapBuffers on the given
+ * framebuffer.  It checks if the current context is bound to the framebuffer
+ * and flushes rendering if needed.
+ */
+void
+st_notify_swapbuffers(struct st_framebuffer *stfb)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (ctx && ctx->DrawBuffer == &stfb->Base) {
+      st_flush( ctx->st, 
+		PIPE_FLUSH_RENDER_CACHE | 
+		PIPE_FLUSH_SWAPBUFFERS |
+		PIPE_FLUSH_FRAME,
+                NULL );
+      ctx->st->frontbuffer_status = FRONT_STATUS_COPY_OF_BACK;
+   }
+}
+
+
+/** 
+ * Quick hack - allows the winsys to inform the driver that surface
+ * states are now undefined after a glXSwapBuffers or similar.
+ */
+void
+st_notify_swapbuffers_complete(struct st_framebuffer *stfb)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (ctx && ctx->DrawBuffer == &stfb->Base) {
+      struct st_renderbuffer *strb;
+
+      /* Mark back color buffers as undefined */
+      strb = st_renderbuffer(stfb->Base.Attachment[BUFFER_BACK_LEFT].
+                             Renderbuffer);
+      if (strb && strb->surface)
+         strb->surface->status = PIPE_SURFACE_STATUS_UNDEFINED;
+
+      strb = st_renderbuffer(stfb->Base.Attachment[BUFFER_BACK_RIGHT].
+                             Renderbuffer);
+      if (strb && strb->surface)
+         strb->surface->status = PIPE_SURFACE_STATUS_UNDEFINED;
+   }
+}
+
+
+void *st_framebuffer_private( struct st_framebuffer *stfb )
+{
+   return stfb->Private;
+}
+
+void st_get_framebuffer_dimensions( struct st_framebuffer *stfb,
+				    uint *width,
+				    uint *height)
+{
+   *width = stfb->Base.Width;
+   *height = stfb->Base.Height;
+}