i965: add support for force_gl_vendor

[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 ac91f628aab5f6095bfa45cd2c8a572c7a5b1687..ad0ad6bd775caac35cc07c83418c5c4ec9826121 100644 (file)
--- a/src/mesa/state_tracker/st_atom_viewport.c
+++ b/src/mesa/state_tracker/st_atom_viewport.c
@@ -1,6 +1,6 @@
 /**************************************************************************
  * 
- * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * Copyright 2007 VMware, Inc.
  * All Rights Reserved.
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a
@@ -18,7 +18,7 @@
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
- * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
@@ -26,15 +26,19 @@
  **************************************************************************/
 
 
-#include "context.h"
-#include "colormac.h"
+#include "main/context.h"
+#include "main/viewport.h"
 #include "st_context.h"
-#include "pipe/p_context.h"
 #include "st_atom.h"
+#include "st_util.h"
+#include "pipe/p_context.h"
+#include "cso_cache/cso_context.h"
 
-
-
-
+static enum pipe_viewport_swizzle
+viewport_swizzle_from_glenum(GLenum16 swizzle)
+{
+   return swizzle - GL_VIEWPORT_SWIZZLE_POSITIVE_X_NV;
+}
 
 /**
  * Update the viewport transformation matrix.  Depends on:
@@ -42,76 +46,39 @@
  *  - depthrange
  *  - window pos/size or FBO size
  */
-static void update_viewport( struct st_context *st )
+void
+st_update_viewport( struct st_context *st )
 {
-   GLcontext *ctx = st->ctx;
-   const GLframebuffer *DrawBuffer = ctx->DrawBuffer;
-   GLfloat yScale = 1.0;
-   GLfloat yBias = 0.0;
+   struct gl_context *ctx = st->ctx;
+   unsigned i;
 
-   /* _NEW_BUFFERS
+   /* _NEW_VIEWPORT 
     */
-   if (DrawBuffer) {
+   for (i = 0; i < st->state.num_viewports; i++) {
+      float *scale = st->state.viewport[i].scale;
+      float *translate = st->state.viewport[i].translate;
 
-#if 0
-      if (DrawBuffer->Name) {
-        /* User created FBO */
-        struct st_renderbuffer *irb
-           = st_renderbuffer(DrawBuffer->_ColorDrawBuffers[0][0]);
-        if (irb && !irb->RenderToTexture) {
-           /* y=0=top */
-           yScale = -1.0;
-           yBias = irb->Base.Height;
-        }
-        else {
-           /* y=0=bottom */
-           yScale = 1.0;
-           yBias = 0.0;
-        }
-      }
-      else 
-      {
-        /* window buffer, y=0=top */
-        yScale = -1.0;
-        yBias = DrawBuffer->Height;
+      _mesa_get_viewport_xform(ctx, i, scale, translate);
+
+      /* _NEW_BUFFERS */
+      /* Drawing to a window where the coordinate system is upside down. */
+      if (st->state.fb_orientation == Y_0_TOP) {
+         scale[1] *= -1;
+         translate[1] = st->state.fb_height - translate[1];
       }
-#endif
-   }
 
-   {
-      /* _NEW_VIEWPORT 
-       */
-      GLfloat x = ctx->Viewport.X;
-      GLfloat y = ctx->Viewport.Y;
-      GLfloat z = ctx->Viewport.Near;
-      GLfloat half_width = ctx->Viewport.Width / 2.0;
-      GLfloat half_height = ctx->Viewport.Height / 2.0;
-      GLfloat half_depth = (ctx->Viewport.Far - ctx->Viewport.Near) / 2.0;
+      st->state.viewport[i].swizzle_x = viewport_swizzle_from_glenum(ctx->ViewportArray[i].SwizzleX);
+      st->state.viewport[i].swizzle_y = viewport_swizzle_from_glenum(ctx->ViewportArray[i].SwizzleY);
+      st->state.viewport[i].swizzle_z = viewport_swizzle_from_glenum(ctx->ViewportArray[i].SwizzleZ);
+      st->state.viewport[i].swizzle_w = viewport_swizzle_from_glenum(ctx->ViewportArray[i].SwizzleW);
+   }
 
-      struct pipe_viewport_state vp;
-      
-      vp.scale[0] = half_width;
-      vp.scale[1] = half_height * yScale;
-      vp.scale[2] = half_depth;
-      vp.scale[3] = 1.0;
+   cso_set_viewport(st->cso_context, &st->state.viewport[0]);
 
-      vp.translate[0] = (half_width + x);
-      vp.translate[1] = (half_height + y) * yScale + yBias;
-      vp.translate[2] = (half_depth + z);
-      vp.translate[3] = 0.0;
+   if (st->state.num_viewports > 1) {
+      struct pipe_context *pipe = st->pipe;
 
-      if (memcmp(&vp, &st->state.viewport, sizeof(vp)) != 0) {
-        st->state.viewport = vp;
-        st->pipe->set_viewport_state(st->pipe, &vp);
-      }
+      pipe->set_viewport_states(pipe, 1, st->state.num_viewports - 1,
+                                &st->state.viewport[1]);
    }
 }
-
-
-const struct st_tracked_state st_update_viewport = {
-   .dirty = {
-      .mesa = _NEW_BUFFERS | _NEW_VIEWPORT,
-      .st = 0,
-   },
-   .update = update_viewport
-};