From a7a26503b67b8baa9df8b2bb194435d681559550 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Sun, 15 Oct 2006 18:51:22 +0000
Subject: Remove calls to _mesa_ResizeBuffersMESA() - generally replace with
 code to check the current window size, then call _mesa_resize_framebuffer().

---
 src/mesa/drivers/allegro/amesa.c             | 12 +++++++++++-
 src/mesa/drivers/directfb/idirectfbgl_mesa.c | 14 ++++++++++++--
 src/mesa/drivers/fbdev/glfbdev.c             | 20 ++++++++++++++++++--
 src/mesa/drivers/ggi/ggimesa.c               | 12 ++++++++++--
 src/mesa/drivers/glide/fxdd.c                | 12 ++++++++++--
 src/mesa/drivers/svga/svgamesa.c             | 14 +++++++++++---
 6 files changed, 72 insertions(+), 12 deletions(-)

diff --git a/src/mesa/drivers/allegro/amesa.c b/src/mesa/drivers/allegro/amesa.c
index cb46efa56a..594668affd 100644
--- a/src/mesa/drivers/allegro/amesa.c
+++ b/src/mesa/drivers/allegro/amesa.c
@@ -145,10 +145,20 @@ static void get_buffer_size(GLcontext *ctx, GLuint *width, GLuint *height)
     }
 
 
+/**
+ * We only implement this function as a mechanism to check if the
+ * framebuffer size has changed (and update corresponding state).
+ */
 static void viewport(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 {
    /* poll for window size change and realloc software Z/stencil/etc if needed */
-   _mesa_ResizeBuffersMESA();
+   GLuint newWidth, newHeight;
+   GLframebuffer *buffer = ctx->WinSysDrawBuffer;
+   get_buffer_size( &newWidth, &newHeight );
+   if (buffer->Width != newWidth || buffer->Height != newHeight) {
+      _mesa_resize_framebuffer(ctx, buffer, newWidth, newHeight );
+   }
+
 }
 
 
diff --git a/src/mesa/drivers/directfb/idirectfbgl_mesa.c b/src/mesa/drivers/directfb/idirectfbgl_mesa.c
index d11241b2b2..3c2a77b5bc 100644
--- a/src/mesa/drivers/directfb/idirectfbgl_mesa.c
+++ b/src/mesa/drivers/directfb/idirectfbgl_mesa.c
@@ -214,7 +214,8 @@ IDirectFBGL_Mesa_Lock( IDirectFBGL *thiz )
      if (data->width != width || data->height != height) {
           data->width  = width;
           data->height = height;
-          _mesa_ResizeBuffersMESA();
+          _mesa_resize_framebuffer(&data->context, 
+                                   &data->framebuffer, width, height);
      }
 
      data->locked = DFB_TRUE;
@@ -355,10 +356,19 @@ dfbGetBufferSize( GLframebuffer *buffer, GLuint *width, GLuint *height )
      *height = (GLuint) data->height;
 }
 
+/**
+ * We only implement this function as a mechanism to check if the
+ * framebuffer size has changed (and update corresponding state).
+ */
 static void
 dfbSetViewport( GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h )
 {
-     _mesa_ResizeBuffersMESA();
+   GLuint newWidth, newHeight;
+   GLframebuffer *buffer = ctx->WinSysDrawBuffer;
+   dfbGetBufferSize( buffer, &newWidth, &newHeight );
+   if (buffer->Width != newWidth || buffer->Height != newHeight) {
+      _mesa_resize_framebuffer(ctx, buffer, newWidth, newHeight );
+   }
 }
 
 static void
diff --git a/src/mesa/drivers/fbdev/glfbdev.c b/src/mesa/drivers/fbdev/glfbdev.c
index 3a6b452065..bd9d3ac0ad 100644
--- a/src/mesa/drivers/fbdev/glfbdev.c
+++ b/src/mesa/drivers/fbdev/glfbdev.c
@@ -157,11 +157,27 @@ get_buffer_size( GLframebuffer *buffer, GLuint *width, GLuint *height )
 }
 
 
+/**
+ * We only implement this function as a mechanism to check if the
+ * framebuffer size has changed (and update corresponding state).
+ */
 static void
 viewport(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 {
-   /* poll for window size change and realloc software Z/stencil/etc if needed */
-   _mesa_ResizeBuffersMESA();
+   GLuint newWidth, newHeight;
+   GLframebuffer *buffer;
+
+   buffer = ctx->WinSysDrawBuffer;
+   get_buffer_size( buffer, &newWidth, &newHeight );
+   if (buffer->Width != newWidth || buffer->Height != newHeight) {
+      _mesa_resize_framebuffer(ctx, buffer, newWidth, newHeight );
+   }
+
+   buffer = ctx->WinSysReadBuffer;
+   get_buffer_size( buffer, &newWidth, &newHeight );
+   if (buffer->Width != newWidth || buffer->Height != newHeight) {
+      _mesa_resize_framebuffer(ctx, buffer, newWidth, newHeight );
+   }
 }
 
 
diff --git a/src/mesa/drivers/ggi/ggimesa.c b/src/mesa/drivers/ggi/ggimesa.c
index 64312204c5..4fbbe61ab8 100644
--- a/src/mesa/drivers/ggi/ggimesa.c
+++ b/src/mesa/drivers/ggi/ggimesa.c
@@ -257,10 +257,18 @@ static void gl_ggiGetSize(GLframebuffer *fb, GLuint *width, GLuint *height)
 	printf("returning %d, %d\n", *width, *height);
 }
 
+/**
+ * We only implement this function as a mechanism to check if the
+ * framebuffer size has changed (and update corresponding state).
+ */
 static void gl_ggiViewport(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 {
-   /* poll for window size change and realloc software Z/stencil/etc if needed */
-   _mesa_ResizeBuffersMESA();
+   GLuint newWidth, newHeight;
+   GLframebuffer *buffer = ctx->WinSysDrawBuffer;
+   gl_ggiGetSize( buffer, &newWidth, &newHeight );
+   if (buffer->Width != newWidth || buffer->Height != newHeight) {
+      _mesa_resize_framebuffer(ctx, buffer, newWidth, newHeight );
+   }
 }
 
 
diff --git a/src/mesa/drivers/glide/fxdd.c b/src/mesa/drivers/glide/fxdd.c
index 1614a7a43a..0ee0e0cae0 100644
--- a/src/mesa/drivers/glide/fxdd.c
+++ b/src/mesa/drivers/glide/fxdd.c
@@ -123,11 +123,19 @@ fxDDGetBufferSize(GLframebuffer *buffer, GLuint *width, GLuint *height)
 }
 
 
+/**
+ * We only implement this function as a mechanism to check if the
+ * framebuffer size has changed (and update corresponding state).
+ */
 static void
 fxDDViewport(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 {
-   /* poll for window size change and realloc software Z/stencil/etc if needed */
-   _mesa_ResizeBuffersMESA();
+   GLuint newWidth, newHeight;
+   GLframebuffer *buffer = ctx->WinSysDrawBuffer;
+   fxDDGetBufferSize( buffer, &newWidth, &newHeight );
+   if (buffer->Width != newWidth || buffer->Height != newHeight) {
+      _mesa_resize_framebuffer(ctx, buffer, newWidth, newHeight );
+   }
 }
 
 
diff --git a/src/mesa/drivers/svga/svgamesa.c b/src/mesa/drivers/svga/svgamesa.c
index 09330e78ab..0dd9a144fe 100644
--- a/src/mesa/drivers/svga/svgamesa.c
+++ b/src/mesa/drivers/svga/svgamesa.c
@@ -1,4 +1,4 @@
-/* $Id: svgamesa.c,v 1.26 2005/09/07 23:26:01 brianp Exp $ */
+/* $Id: svgamesa.c,v 1.27 2006/10/15 18:51:22 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -213,10 +213,18 @@ static void get_buffer_size( GLframebuffer *buffer, GLuint *width, GLuint *heigh
    *height = SVGAMesa->height = vga_getydim();
 }
 
+/**
+ * We only implement this function as a mechanism to check if the
+ * framebuffer size has changed (and update corresponding state).
+ */
 static void viewport(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 {
-   /* poll for window size change and realloc software Z/stencil/etc if needed */
-   _mesa_ResizeBuffersMESA();
+   GLuint newWidth, newHeight;
+   GLframebuffer *buffer = ctx->WinSysDrawBuffer;
+   get_buffer_size( buffer, &newWidth, &newHeight );
+   if (buffer->Width != newWidth || buffer->Height != newHeight) {
+      _mesa_resize_framebuffer(ctx, buffer, newWidth, newHeight );
+   }
 }
 
 static void set_buffer( GLcontext *ctx, GLframebuffer *colorBuffer,
-- 
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