X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fdrivers%2Fdri%2Fi965%2Fintel_buffers.c;h=6ad67f1a63e8bed8fa9b2539aad7141d4cb7bbd0;hb=81b11bf0934d5387bd3741b6268501df3973a6a7;hp=a89c902b07ba94cf8ce9370c2af08b3e3acd8a91;hpb=9147b4049658fe2401c19e03d20220aeea0fafc6;p=mesa.git

diff --git a/src/mesa/drivers/dri/i965/intel_buffers.c b/src/mesa/drivers/dri/i965/intel_buffers.c
index a89c902b07b..6ad67f1a63e 100644
--- a/src/mesa/drivers/dri/i965/intel_buffers.c
+++ b/src/mesa/drivers/dri/i965/intel_buffers.c
@@ -1,8 +1,8 @@
 /**************************************************************************
- * 
- * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
+ *
+ * Copyright 2003 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
@@ -10,19 +10,19 @@
  * 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
+ * IN NO EVENT SHALL VMWARE 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 "brw_context.h"
@@ -34,42 +34,38 @@
 #include "main/framebuffer.h"
 #include "main/renderbuffer.h"
 
-/**
- * Check if we're about to draw into the front color buffer.
- * If so, set the brw->front_buffer_dirty field to true.
- */
-void
-intel_check_front_buffer_rendering(struct brw_context *brw)
+
+bool
+brw_is_front_buffer_reading(struct gl_framebuffer *fb)
 {
-   struct intel_context *intel = &brw->intel;
-   const struct gl_framebuffer *fb = intel->ctx.DrawBuffer;
-   if (_mesa_is_winsys_fbo(fb)) {
-      /* drawing to window system buffer */
-      if (fb->_NumColorDrawBuffers > 0) {
-         if (fb->_ColorDrawBufferIndexes[0] == BUFFER_FRONT_LEFT) {
-	    brw->front_buffer_dirty = true;
-	 }
-      }
-   }
+   if (!fb || _mesa_is_user_fbo(fb))
+      return false;
+
+   return fb->_ColorReadBufferIndex == BUFFER_FRONT_LEFT;
+}
+
+bool
+brw_is_front_buffer_drawing(struct gl_framebuffer *fb)
+{
+   if (!fb || _mesa_is_user_fbo(fb))
+      return false;
+
+   return (fb->_NumColorDrawBuffers >= 1 &&
+           fb->_ColorDrawBufferIndexes[0] == BUFFER_FRONT_LEFT);
 }
 
 static void
 intelDrawBuffer(struct gl_context * ctx, GLenum mode)
 {
-   if (ctx->DrawBuffer && _mesa_is_winsys_fbo(ctx->DrawBuffer)) {
+   if (brw_is_front_buffer_drawing(ctx->DrawBuffer)) {
       struct brw_context *const brw = brw_context(ctx);
-      struct intel_context *const intel = intel_context(ctx);
-      const bool was_front_buffer_rendering = brw->is_front_buffer_rendering;
 
-      brw->is_front_buffer_rendering = (mode == GL_FRONT_LEFT)
-	|| (mode == GL_FRONT) || (mode == GL_FRONT_AND_BACK);
-
-      /* If we weren't front-buffer rendering before but we are now,
-       * invalidate our DRI drawable so we'll ask for new buffers
+      /* If we might be front-buffer rendering on this buffer for the first
+       * time, invalidate our DRI drawable so we'll ask for new buffers
        * (including the fake front) before we start rendering again.
        */
-      if (!was_front_buffer_rendering && brw->is_front_buffer_rendering)
-	 dri2InvalidateDrawable(intel->driContext->driDrawablePriv);
+      dri2InvalidateDrawable(brw->driContext->driDrawablePriv);
+      intel_prepare_render(brw);
    }
 }
 
@@ -77,19 +73,15 @@ intelDrawBuffer(struct gl_context * ctx, GLenum mode)
 static void
 intelReadBuffer(struct gl_context * ctx, GLenum mode)
 {
-   if (ctx->DrawBuffer && _mesa_is_winsys_fbo(ctx->DrawBuffer)) {
+   if (brw_is_front_buffer_reading(ctx->ReadBuffer)) {
       struct brw_context *const brw = brw_context(ctx);
-      struct intel_context *const intel = intel_context(ctx);
-      const bool was_front_buffer_reading = brw->is_front_buffer_reading;
-
-      brw->is_front_buffer_reading = mode == GL_FRONT_LEFT || mode == GL_FRONT;
 
-      /* If we weren't front-buffer reading before but we are now,
-       * invalidate our DRI drawable so we'll ask for new buffers
+      /* If we might be front-buffer reading on this buffer for the first
+       * time, invalidate our DRI drawable so we'll ask for new buffers
        * (including the fake front) before we start reading again.
        */
-      if (!was_front_buffer_reading && brw->is_front_buffer_reading)
-	 dri2InvalidateDrawable(intel->driContext->driReadablePriv);
+      dri2InvalidateDrawable(brw->driContext->driReadablePriv);
+      intel_prepare_render(brw);
    }
 }