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

[Andreas Fänger]

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.
---
 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