mesa: Add "shader/" path to #include statements in shader parser/lexer sources
[mesa.git] / src / mesa / state_tracker / st_framebuffer.c
index 0d4474a8b3ae3530858602072e9bec48cc76e335..a5d1ae3b034388dd713b35ee0ae7d82e20d84366 100644 (file)
 #include "main/matrix.h"
 #include "main/renderbuffer.h"
 #include "main/scissor.h"
+#include "main/viewport.h"
 #include "st_context.h"
 #include "st_cb_fbo.h"
 #include "st_public.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_context.h"
-#include "pipe/p_inlines.h"
 
 
 struct st_framebuffer *
@@ -52,31 +52,32 @@ st_create_framebuffer( const __GLcontextModes *visual,
    struct st_framebuffer *stfb = ST_CALLOC_STRUCT(st_framebuffer);
    if (stfb) {
       int samples = st_get_msaa();
+      int i;
 
       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);
+            = st_new_renderbuffer_fb(colorFormat, samples, FALSE);
          _mesa_add_renderbuffer(&stfb->Base, BUFFER_BACK_LEFT, rb);
       }
+      else {
+         /* Only allocate front buffer right now if we're single buffered.
+          * If double-buffered, allocate front buffer on demand later.
+          * See check_create_front_buffers() and st_set_framebuffer_surface().
+          */
+         struct gl_renderbuffer *rb
+            = st_new_renderbuffer_fb(colorFormat, samples, FALSE);
+         _mesa_add_renderbuffer(&stfb->Base, BUFFER_FRONT_LEFT, rb);
+      }
 
       if (depthFormat == stencilFormat && depthFormat != PIPE_FORMAT_NONE) {
          /* combined depth/stencil buffer */
          struct gl_renderbuffer *depthStencilRb
-            = st_new_renderbuffer_fb(depthFormat, samples);
+            = st_new_renderbuffer_fb(depthFormat, samples, FALSE);
          /* note: bind RB to two attachment points */
          _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthStencilRb);
          _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, depthStencilRb);
@@ -87,37 +88,44 @@ st_create_framebuffer( const __GLcontextModes *visual,
          if (visual->depthBits == 32) {
             /* 32-bit depth buffer */
             struct gl_renderbuffer *depthRb
-               = st_new_renderbuffer_fb(depthFormat, samples);
+               = st_new_renderbuffer_fb(depthFormat, samples, FALSE);
             _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);
+               = st_new_renderbuffer_fb(depthFormat, samples, FALSE);
             _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);
+               = st_new_renderbuffer_fb(depthFormat, samples, FALSE);
             _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);
+               = st_new_renderbuffer_fb(stencilFormat, samples, FALSE);
             _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, stencilRb);
          }
       }
 
       if (visual->accumRedBits > 0) {
          /* 16-bit/channel accum */
+         /* TODO: query the pipe screen for accumulation buffer format support */
          struct gl_renderbuffer *accumRb
-            = st_new_renderbuffer_fb(DEFAULT_ACCUM_PIPE_FORMAT, 0); /* XXX accum isn't multisampled right? */
+            = st_new_renderbuffer_fb(PIPE_FORMAT_R16G16B16A16_SNORM, 0, TRUE);
          _mesa_add_renderbuffer(&stfb->Base, BUFFER_ACCUM, accumRb);
       }
 
+      for (i = 0; i < visual->numAuxBuffers; i++) {
+         struct gl_renderbuffer *aux
+            = st_new_renderbuffer_fb(colorFormat, 0, FALSE);
+         _mesa_add_renderbuffer(&stfb->Base, BUFFER_AUX0 + i, aux);
+      }
+
       stfb->Base.Initialized = GL_TRUE;
       stfb->InitWidth = width;
       stfb->InitHeight = height;
@@ -133,16 +141,7 @@ void st_resize_framebuffer( struct st_framebuffer *stfb,
    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_check_init_viewport(ctx, width, height);
 
          _mesa_resize_framebuffer(ctx, &stfb->Base, width, height);
 
@@ -155,7 +154,7 @@ void st_resize_framebuffer( struct st_framebuffer *stfb,
 
 void st_unreference_framebuffer( struct st_framebuffer *stfb )
 {
-   _mesa_unreference_framebuffer((struct gl_framebuffer **) &stfb);
+   _mesa_reference_framebuffer((struct gl_framebuffer **) &stfb, NULL);
 }
 
 
@@ -178,8 +177,20 @@ st_set_framebuffer_surface(struct st_framebuffer *stfb,
 
    strb = st_renderbuffer(stfb->Base.Attachment[surfIndex].Renderbuffer);
 
-   /* fail */
-   if (!strb) return;
+   if (!strb) {
+      if (surfIndex == ST_SURFACE_FRONT_LEFT) {
+         /* Delayed creation when the window system supplies a fake front buffer */
+         struct st_renderbuffer *strb_back
+            = st_renderbuffer(stfb->Base.Attachment[ST_SURFACE_BACK_LEFT].Renderbuffer);
+         struct gl_renderbuffer *rb
+            = st_new_renderbuffer_fb(surf->format, strb_back->Base.NumSamples, FALSE);
+         _mesa_add_renderbuffer(&stfb->Base, BUFFER_FRONT_LEFT, rb);
+         strb = st_renderbuffer(rb);
+      } else {
+         /* fail */
+         return;
+      }
+   }
 
    /* replace the renderbuffer's surface/texture pointers */
    pipe_surface_reference( &strb->surface, surf );
@@ -288,34 +299,118 @@ st_notify_swapbuffers(struct st_framebuffer *stfb)
                PIPE_FLUSH_SWAPBUFFERS |
                PIPE_FLUSH_FRAME,
                 NULL );
-      ctx->st->frontbuffer_status = FRONT_STATUS_COPY_OF_BACK;
+      if (st_renderbuffer(stfb->Base.Attachment[BUFFER_BACK_LEFT].Renderbuffer))
+         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.
+/**
+ * Swap the front/back color buffers.  Exchange the front/back pointers
+ * and update some derived state.
+ * No need to call st_notify_swapbuffers() first.
+ *
+ * For a single-buffered framebuffer, no swap occurs, but we still return
+ * the pointer(s) to the front color buffer(s).
+ *
+ * \param front_left  returns pointer to front-left renderbuffer after swap
+ * \param front_right  returns pointer to front-right renderbuffer after swap
  */
 void
-st_notify_swapbuffers_complete(struct st_framebuffer *stfb)
+st_swapbuffers(struct st_framebuffer *stfb,
+               struct pipe_surface **front_left,
+               struct pipe_surface **front_right)
 {
+   struct gl_framebuffer *fb = &stfb->Base;
+
    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;
+      st_flush( ctx->st, 
+               PIPE_FLUSH_RENDER_CACHE | 
+               PIPE_FLUSH_SWAPBUFFERS |
+               PIPE_FLUSH_FRAME,
+                NULL );
+   }
+
+   if (!fb->Visual.doubleBufferMode) {
+      /* single buffer mode - return pointers to front surfaces */
+      if (front_left) {
+         struct st_renderbuffer *strb =
+            st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
+         *front_left = strb->surface;
+      }
+      if (front_right) {
+         struct st_renderbuffer *strb =
+            st_renderbuffer(fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer);
+         *front_right = strb ? strb->surface : NULL;
+      }
+      return;
    }
+
+   /* swap left buffers */
+   if (fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer &&
+       fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer) {
+      struct gl_renderbuffer *rbTemp;
+      rbTemp = fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer;
+      fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer =
+         fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer;
+      fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer = rbTemp;
+      if (front_left) {
+         struct st_renderbuffer *strb =
+            st_renderbuffer(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
+         *front_left = strb->surface;
+      }
+      /* mark back buffer contents as undefined */
+      {
+         struct st_renderbuffer *back =
+            st_renderbuffer(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer);
+         back->defined = GL_FALSE;
+      }
+   }
+   else {
+      /* no front buffer, display the back buffer */
+      if (front_left) {
+         struct st_renderbuffer *strb =
+            st_renderbuffer(fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer);
+         *front_left = strb->surface;
+      }
+   }
+
+   /* swap right buffers (for stereo) */
+   if (fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer &&
+       fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer) {
+      struct gl_renderbuffer *rbTemp;
+      rbTemp = fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer;
+      fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer =
+         fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer;
+      fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer = rbTemp;
+      if (front_right) {
+         struct st_renderbuffer *strb =
+            st_renderbuffer(fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer);
+         *front_right = strb->surface;
+      }
+      /* mark back buffer contents as undefined */
+      {
+         struct st_renderbuffer *back =
+            st_renderbuffer(fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer);
+         back->defined = GL_FALSE;
+      }
+   }
+   else {
+      /* no front right buffer, display back right buffer (if exists) */
+      if (front_right) {
+         struct st_renderbuffer *strb =
+            st_renderbuffer(fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer);
+         *front_right = strb ? strb->surface : NULL;
+      }
+   }
+
+   /* Update the _ColorDrawBuffers[] array and _ColorReadBuffer pointer */
+   _mesa_update_framebuffer(ctx);
+
+   /* Make sure we draw into the new back surface */
+   st_invalidate_state(ctx, _NEW_BUFFERS);
 }