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-rw-r--r--src/mesa/drivers/common/meta.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c
index cd9075b393..adc986402c 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);
}