[Mesa-stable] [PATCH v2] scons: build osmesa swrast and gallium

[Andreas Fänger]

This patch makes it possible to build classic osmesa/swrast on windows
again. Although there is a gallium version of osmesa now, the swrast version
still has more features lacking in llvmpipe, e.g. anisotropic filtering.

This reverts commit 69db422218b0264b5b8eef45bd003a2544e9cbd6 and
c07df0f2014636b601cdbaff63214296599b1ad5 and adds "compiler" to
the LIBS in SConscript.

Cc: "11.2" <mesa-stable at lists.freedesktop.org>

---
 src/mesa/drivers/SConscript         |  2 ++
 src/mesa/drivers/osmesa/Makefile.am |  2 ++
 src/mesa/drivers/osmesa/SConscript  | 40 +++++++++++++++++++++++++++++++++++++
 src/mesa/drivers/osmesa/osmesa.def  | 15 ++++++++++++++
 4 files changed, 59 insertions(+)
 create mode 100644 src/mesa/drivers/osmesa/SConscript
 create mode 100644 src/mesa/drivers/osmesa/osmesa.def

diff --git a/src/mesa/drivers/SConscript b/src/mesa/drivers/SConscript
index 5d654f5..476425b 100644
--- a/src/mesa/drivers/SConscript
+++ b/src/mesa/drivers/SConscript
@@ -1,5 +1,7 @@
 Import('*')
 
+SConscript('osmesa/SConscript')
+
 if env['x11']:
     SConscript('x11/SConscript')
 
diff --git a/src/mesa/drivers/osmesa/Makefile.am b/src/mesa/drivers/osmesa/Makefile.am
index 46332e1..5525687 100644
--- a/src/mesa/drivers/osmesa/Makefile.am
+++ b/src/mesa/drivers/osmesa/Makefile.am
@@ -21,6 +21,8 @@
 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 # IN THE SOFTWARE.
 
+EXTRA_DIST = osmesa.def SConscript
+
 AM_CPPFLAGS = \
 	-I$(top_srcdir)/include \
 	-I$(top_srcdir)/src \
diff --git a/src/mesa/drivers/osmesa/SConscript b/src/mesa/drivers/osmesa/SConscript
new file mode 100644
index 0000000..5933f07
--- /dev/null
+++ b/src/mesa/drivers/osmesa/SConscript
@@ -0,0 +1,40 @@
+Import('*')
+
+env = env.Clone()
+
+env.Prepend(CPPPATH = [
+    '#src',
+    '#src/mapi',
+    '#src/mesa',
+    Dir('../../../mapi'), # src/mapi build path for python-generated GL API files/headers
+])
+
+env.Prepend(LIBS = [
+    mesautil,
+    glapi,
+    compiler,
+    mesa,
+    glsl,
+])
+
+sources = [
+    'osmesa.c',
+]
+
+if env['platform'] == 'windows':
+    env.AppendUnique(CPPDEFINES = [
+        '_GDI32_', # prevent wgl* being declared __declspec(dllimport)
+        'BUILD_GL32', # declare gl* as __declspec(dllexport) in Mesa headers 
+    ])
+    if not env['gles']:
+        # prevent _glapi_* from being declared __declspec(dllimport)
+        env.Append(CPPDEFINES = ['_GLAPI_NO_EXPORTS'])
+
+    sources += ['osmesa.def']
+    
+osmesa = env.SharedLibrary(
+    target ='osmesa',
+    source = sources,
+)
+
+env.Alias('osmesa', osmesa)
diff --git a/src/mesa/drivers/osmesa/osmesa.def b/src/mesa/drivers/osmesa/osmesa.def
new file mode 100644
index 0000000..06afab7
--- /dev/null
+++ b/src/mesa/drivers/osmesa/osmesa.def
@@ -0,0 +1,15 @@
+;DESCRIPTION 'Mesa OSMesa lib for Win32'
+VERSION 4.1
+
+EXPORTS
+	OSMesaColorClamp
+	OSMesaCreateContext
+	OSMesaCreateContextExt
+	OSMesaDestroyContext
+	OSMesaMakeCurrent
+	OSMesaGetCurrentContext
+	OSMesaPixelStore
+	OSMesaGetIntegerv
+	OSMesaGetDepthBuffer
+	OSMesaGetColorBuffer
+	OSMesaGetProcAddress
-- 
2.7.2.windows.1