vo_gl: Add initial stereo support

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@31633 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 85 insertions, 0 deletions

diff --git a/libvo/gl_common.c b/libvo/gl_common.c
index c28632e0c0..e455acc213 100644
--- a/libvo/gl_common.c
+++ b/libvo/gl_common.c
@@ -93,6 +93,7 @@ void (GLAPIENTRY *mpglLightfv)(GLenum, GLenum, const GLfloat *);
 void (GLAPIENTRY *mpglColorMaterial)(GLenum, GLenum);
 void (GLAPIENTRY *mpglShadeModel)(GLenum);
 void (GLAPIENTRY *mpglGetIntegerv)(GLenum, GLint *);
+void (GLAPIENTRY *mpglColorMask)(GLboolean, GLboolean, GLboolean, GLboolean);
 
 /**
  * \defgroup glextfunctions OpenGL extension functions
@@ -437,6 +438,7 @@ static const extfunc_desc_t extfuncs[] = {
   DEF_FUNC_DESC(ColorMaterial),
   DEF_FUNC_DESC(ShadeModel),
   DEF_FUNC_DESC(GetIntegerv),
+  DEF_FUNC_DESC(ColorMask),
 
   // here start the real extensions
   {&mpglGenBuffers, NULL, {"glGenBuffers", "glGenBuffersARB", NULL}},
@@ -1543,6 +1545,89 @@ void glDisableYUVConversion(GLenum target, int type) {
   }
 }
 
+void glEnable3DLeft(int type) {
+  GLint buffer;
+  switch (type) {
+    case GL_3D_RED_CYAN:
+      mpglColorMask(GL_TRUE,  GL_FALSE, GL_FALSE, GL_FALSE);
+      break;
+    case GL_3D_GREEN_MAGENTA:
+      mpglColorMask(GL_FALSE, GL_TRUE,  GL_FALSE, GL_FALSE);
+      break;
+    case GL_3D_QUADBUFFER:
+      mpglGetIntegerv(GL_DRAW_BUFFER, &buffer);
+      switch (buffer) {
+        case GL_FRONT:
+        case GL_FRONT_LEFT:
+        case GL_FRONT_RIGHT:
+          buffer = GL_FRONT_LEFT;
+          break;
+        case GL_BACK:
+        case GL_BACK_LEFT:
+        case GL_BACK_RIGHT:
+          buffer = GL_BACK_LEFT;
+          break;
+      }
+      mpglDrawBuffer(buffer);
+      break;
+  }
+}
+
+void glEnable3DRight(int type) {
+  GLint buffer;
+  switch (type) {
+    case GL_3D_RED_CYAN:
+      mpglColorMask(GL_FALSE, GL_TRUE,  GL_TRUE,  GL_FALSE);
+      break;
+    case GL_3D_GREEN_MAGENTA:
+      mpglColorMask(GL_TRUE,  GL_FALSE, GL_TRUE,  GL_FALSE);
+      break;
+    case GL_3D_QUADBUFFER:
+      mpglGetIntegerv(GL_DRAW_BUFFER, &buffer);
+      switch (buffer) {
+        case GL_FRONT:
+        case GL_FRONT_LEFT:
+        case GL_FRONT_RIGHT:
+          buffer = GL_FRONT_RIGHT;
+          break;
+        case GL_BACK:
+        case GL_BACK_LEFT:
+        case GL_BACK_RIGHT:
+          buffer = GL_BACK_RIGHT;
+          break;
+      }
+      mpglDrawBuffer(buffer);
+      break;
+  }
+}
+
+void glDisable3D(int type) {
+  GLint buffer;
+  switch (type) {
+    case GL_3D_RED_CYAN:
+    case GL_3D_GREEN_MAGENTA:
+      mpglColorMask(GL_TRUE,  GL_TRUE,  GL_TRUE,  GL_TRUE);
+      break;
+    case GL_3D_QUADBUFFER:
+      mpglDrawBuffer(vo_doublebuffering ? GL_BACK : GL_FRONT);
+      mpglGetIntegerv(GL_DRAW_BUFFER, &buffer);
+      switch (buffer) {
+        case GL_FRONT:
+        case GL_FRONT_LEFT:
+        case GL_FRONT_RIGHT:
+          buffer = GL_FRONT;
+          break;
+        case GL_BACK:
+        case GL_BACK_LEFT:
+        case GL_BACK_RIGHT:
+          buffer = GL_BACK;
+          break;
+      }
+      mpglDrawBuffer(buffer);
+      break;
+  }
+}
+
 /**
  * \brief draw a texture part at given 2D coordinates
  * \param x screen top coordinate