gallium: glFramebufferBlitEXT() implementation

1 files changed, 125 insertions, 0 deletions

diff --git a/src/mesa/state_tracker/st_cb_blit.c b/src/mesa/state_tracker/st_cb_blit.c
new file mode 100644
index 0000000000..dfa79c975c
--- /dev/null
+++ b/src/mesa/state_tracker/st_cb_blit.c
@@ -0,0 +1,125 @@
+/**************************************************************************
+ * 
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * 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
+ * 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.
+ * 
+ **************************************************************************/
+
+ /*
+  * Authors:
+  *   Brian Paul
+  */
+
+#include "main/imports.h"
+#include "main/image.h"
+#include "main/macros.h"
+#include "main/texformat.h"
+#include "shader/program.h"
+#include "shader/prog_parameter.h"
+#include "shader/prog_print.h"
+
+#include "st_context.h"
+#include "st_program.h"
+#include "st_cb_drawpixels.h"
+#include "st_cb_blit.h"
+#include "st_cb_fbo.h"
+
+#include "util/u_blit.h"
+
+#include "cso_cache/cso_context.h"
+
+
+void
+st_init_blit(struct st_context *st)
+{
+   st->blit = util_create_blit(st->pipe);
+}
+
+
+void
+st_destroy_blit(struct st_context *st)
+{
+   util_destroy_blit(st->blit);
+   st->blit = NULL;
+}
+
+
+static void
+st_BlitFramebuffer(GLcontext *ctx,
+                   GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
+                   GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
+                   GLbitfield mask, GLenum filter)
+{
+   struct st_context *st = ctx->st;
+   struct pipe_context *pipe = st->pipe;
+
+   const uint pFilter = ((filter == GL_NEAREST)
+                         ? PIPE_TEX_MIPFILTER_NEAREST
+                         : PIPE_TEX_MIPFILTER_LINEAR);
+
+   if (mask & GL_COLOR_BUFFER_BIT) {
+      struct st_renderbuffer *srcRb = 
+         st_renderbuffer(ctx->ReadBuffer->_ColorReadBuffer);
+      struct st_renderbuffer *dstRb = 
+         st_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0][0]);
+      struct pipe_surface *srcSurf = srcRb->surface;
+      struct pipe_surface *dstSurf = dstRb->surface;
+
+      srcY0 = srcRb->Base.Height - srcY0;
+      srcY1 = srcRb->Base.Height - srcY1;
+
+      dstY0 = dstRb->Base.Height - dstY0;
+      dstY1 = dstRb->Base.Height - dstY1;
+
+      util_blit_pixels(st->blit,
+                       srcSurf, srcX0, srcY0, srcX1, srcY1,
+                       dstSurf, dstX0, dstY0, dstX1, dstY1,
+                       0.0, pFilter);
+
+   }
+
+#if 0
+   /* XXX is this sufficient? */
+   st_invalidate_state(ctx, _NEW_COLOR | _NEW_TEXTURE);
+#else
+   /* need to "unset" cso state because we went behind the back of the cso
+    * tracker.  Without unset, the _set_ calls would be no-ops.
+    */
+   cso_unset_blend(st->cso_context);
+   cso_unset_depth_stencil_alpha(st->cso_context);
+   cso_unset_rasterizer(st->cso_context);
+   cso_set_blend(st->cso_context, &st->state.blend);
+   cso_set_depth_stencil_alpha(st->cso_context, &st->state.depth_stencil);
+   cso_set_rasterizer(st->cso_context, &st->state.rasterizer);
+   pipe->bind_fs_state(pipe, st->fp->driver_shader);
+   pipe->bind_vs_state(pipe, st->vp->driver_shader);
+#endif
+}
+
+
+
+void
+st_init_blit_functions(struct dd_function_table *functions)
+{
+   functions->BlitFramebuffer = st_BlitFramebuffer;
+}