i965: Move front buffer rendering fields from intel_context to brw.

[mesa.git] / src / mesa / drivers / dri / i965 / intel_buffers.c

diff --git a/src/mesa/drivers/dri/i965/intel_buffers.c b/src/mesa/drivers/dri/i965/intel_buffers.c
deleted file mode 120000 (symlink)
index c86daa49f47cd6f633b2ac0da20838a6ac12f6dd..0000000000000000000000000000000000000000
--- a/src/mesa/drivers/dri/i965/intel_buffers.c
+++ /dev/null
@@ -1 +0,0 @@
-../intel/intel_buffers.c
\ No newline at end of file

diff --git a/src/mesa/drivers/dri/i965/intel_buffers.c b/src/mesa/drivers/dri/i965/intel_buffers.c
new file mode 100644 (file)
index 0000000000000000000000000000000000000000..a89c902b07ba94cf8ce9370c2af08b3e3acd8a91
--- /dev/null
+++ b/src/mesa/drivers/dri/i965/intel_buffers.c
@@ -0,0 +1,102 @@
+/**************************************************************************
+ * 
+ * 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 "brw_context.h"
+#include "intel_buffers.h"
+#include "intel_fbo.h"
+#include "intel_mipmap_tree.h"
+
+#include "main/fbobject.h"
+#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)
+{
+   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;
+        }
+      }
+   }
+}
+
+static void
+intelDrawBuffer(struct gl_context * ctx, GLenum mode)
+{
+   if (ctx->DrawBuffer && _mesa_is_winsys_fbo(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
+       * (including the fake front) before we start rendering again.
+       */
+      if (!was_front_buffer_rendering && brw->is_front_buffer_rendering)
+        dri2InvalidateDrawable(intel->driContext->driDrawablePriv);
+   }
+}
+
+
+static void
+intelReadBuffer(struct gl_context * ctx, GLenum mode)
+{
+   if (ctx->DrawBuffer && _mesa_is_winsys_fbo(ctx->DrawBuffer)) {
+      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
+       * (including the fake front) before we start reading again.
+       */
+      if (!was_front_buffer_reading && brw->is_front_buffer_reading)
+        dri2InvalidateDrawable(intel->driContext->driReadablePriv);
+   }
+}
+
+
+void
+intelInitBufferFuncs(struct dd_function_table *functions)
+{
+   functions->DrawBuffer = intelDrawBuffer;
+   functions->ReadBuffer = intelReadBuffer;
+}