st/mesa: unify common code in st_draw_vbo functions

[mesa.git] / src / mesa / state_tracker / st_atom_viewport.c

diff --git a/src/mesa/state_tracker/st_atom_viewport.c b/src/mesa/state_tracker/st_atom_viewport.c
index 7a1a689b7907a806a8e7c9a89f62487d5ab3cd0c..900f0617caa3b6e55ce27ac81567204530cc41a5 100644 (file)
--- a/src/mesa/state_tracker/st_atom_viewport.c
+++ b/src/mesa/state_tracker/st_atom_viewport.c
@@ -27,6 +27,7 @@
 
 
 #include "main/context.h"
+#include "main/viewport.h"
 #include "st_context.h"
 #include "st_atom.h"
 #include "pipe/p_context.h"
@@ -38,12 +39,12 @@
  *  - depthrange
  *  - window pos/size or FBO size
  */
-static void
-update_viewport( struct st_context *st )
+void
+st_update_viewport( struct st_context *st )
 {
    struct gl_context *ctx = st->ctx;
    GLfloat yScale, yBias;
-
+   unsigned i;
    /* _NEW_BUFFERS
     */
    if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
@@ -61,34 +62,21 @@ update_viewport( struct st_context *st )
 
    /* _NEW_VIEWPORT 
     */
+   for (i = 0; i < ctx->Const.MaxViewports; i++)
    {
-      GLfloat x = (GLfloat)ctx->Viewport.X;
-      GLfloat y = (GLfloat)ctx->Viewport.Y;
-      GLfloat z = ctx->Viewport.Near;
-      GLfloat half_width = (GLfloat)ctx->Viewport.Width * 0.5f;
-      GLfloat half_height = (GLfloat)ctx->Viewport.Height * 0.5f;
-      GLfloat half_depth = (GLfloat)(ctx->Viewport.Far - ctx->Viewport.Near) * 0.5f;
-      
-      st->state.viewport.scale[0] = half_width;
-      st->state.viewport.scale[1] = half_height * yScale;
-      st->state.viewport.scale[2] = half_depth;
-      st->state.viewport.scale[3] = 1.0;
+      float scale[3], translate[3];
+      _mesa_get_viewport_xform(ctx, i, scale, translate);
 
-      st->state.viewport.translate[0] = half_width + x;
-      st->state.viewport.translate[1] = (half_height + y) * yScale + yBias;
-      st->state.viewport.translate[2] = half_depth + z;
-      st->state.viewport.translate[3] = 0.0;
+      st->state.viewport[i].scale[0] = scale[0];
+      st->state.viewport[i].scale[1] = scale[1] * yScale;
+      st->state.viewport[i].scale[2] = scale[2];
 
-      cso_set_viewport(st->cso_context, &st->state.viewport);
+      st->state.viewport[i].translate[0] = translate[0];
+      st->state.viewport[i].translate[1] = translate[1] * yScale + yBias;
+      st->state.viewport[i].translate[2] = translate[2];
    }
-}
 
-
-const struct st_tracked_state st_update_viewport = {
-   "st_update_viewport",                               /* name */
-   {                                                   /* dirty */
-      _NEW_BUFFERS | _NEW_VIEWPORT,                    /* mesa */
-      0,                                               /* st */
-   },
-   update_viewport                                     /* update */
-};
+   cso_set_viewport(st->cso_context, &st->state.viewport[0]);
+   if (ctx->Const.MaxViewports > 1)
+      st->pipe->set_viewport_states(st->pipe, 1, ctx->Const.MaxViewports - 1, &st->state.viewport[1]);
+}