Mesa (mesa_7_7_branch): meta: set viewport and projection matrix in _mesa_meta_GenerateMipmap

[Brian Paul]

Module: Mesa
Branch: mesa_7_7_branch
Commit: 06970b2ccb6add0696710f01a07ebf9ec3922c80
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=06970b2ccb6add0696710f01a07ebf9ec3922c80

Author: Brian Paul <brianp at vmware.com>
Date:   Wed Jan  6 18:12:42 2010 -0700

meta: set viewport and projection matrix in _mesa_meta_GenerateMipmap

This fixes mipmap levels being clipped to the last viewport.

Based on a patch submitted by Pierre Willenbrock <pierre at pirsoft.de>

---

 src/mesa/drivers/common/meta.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c
index cd9075b..adc9864 100644
--- a/src/mesa/drivers/common/meta.c
+++ b/src/mesa/drivers/common/meta.c
@@ -2408,6 +2408,15 @@ _mesa_meta_GenerateMipmap(GLcontext *ctx, GLenum target,
          break;
       }
 
+      assert(dstWidth == ctx->DrawBuffer->Width);
+      assert(dstHeight == ctx->DrawBuffer->Height);
+
+      /* setup viewport and matching projection matrix */
+      _mesa_set_viewport(ctx, 0, 0, dstWidth, dstHeight);
+      _mesa_MatrixMode(GL_PROJECTION);
+      _mesa_LoadIdentity();
+      _mesa_Ortho(0.0F, dstWidth, 0.0F, dstHeight, -1.0F, 1.0F);
+
       _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
    }