scons: build osmesa swrast and gallium

This patch makes it possible to build classic osmesa/swrast on windows
again. It was removed in commit 69db422218b0264b5b8eef45bd003a2544e9cbd6.
Although there is a gallium version of osmesa now, the swrast version
still has more features lacking in llvmpipe, e.g. anisotropic filtering.

Tested-by: Brian Paul <[email protected]>
Reviewed-by: Brian Paul <[email protected]>
[Emil Velikov: remove trailing whitespace]
Signed-off-by: Emil Velikov <[email protected]>

1 files changed, 40 insertions, 0 deletions

diff --git a/src/mesa/drivers/osmesa/SConscript b/src/mesa/drivers/osmesa/SConscript
new file mode 100644
index 00000000000..728031446e5
--- /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)