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Diffstat (limited to 'src/mesa/state_tracker/st_atom_framebuffer.c')
-rw-r--r--src/mesa/state_tracker/st_atom_framebuffer.c165
1 files changed, 165 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_atom_framebuffer.c b/src/mesa/state_tracker/st_atom_framebuffer.c
new file mode 100644
index 0000000000..ca1a719a9a
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+++ b/src/mesa/state_tracker/st_atom_framebuffer.c
@@ -0,0 +1,165 @@
+/**************************************************************************
+ *
+ * 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:
+ * Keith Whitwell <keith@tungstengraphics.com>
+ * Brian Paul
+ */
+
+#include "st_context.h"
+#include "st_atom.h"
+#include "st_cb_fbo.h"
+#include "st_texture.h"
+#include "pipe/p_context.h"
+#include "pipe/p_inlines.h"
+#include "cso_cache/cso_context.h"
+
+
+
+/**
+ * When doing GL render to texture, we have to be sure that finalize_texture()
+ * didn't yank out the pipe_texture that we earlier created a surface for.
+ * Check for that here and create a new surface if needed.
+ */
+static void
+update_renderbuffer_surface(struct st_context *st,
+ struct st_renderbuffer *strb)
+{
+ struct pipe_screen *screen = st->pipe->screen;
+ struct pipe_texture *texture = strb->rtt->pt;
+ int rtt_width = strb->Base.Width;
+ int rtt_height = strb->Base.Height;
+
+ if (!strb->surface ||
+ strb->surface->texture != texture ||
+ strb->surface->width != rtt_width ||
+ strb->surface->height != rtt_height) {
+ GLuint level;
+ /* find matching mipmap level size */
+ for (level = 0; level <= texture->last_level; level++) {
+ if (texture->width[level] == rtt_width &&
+ texture->height[level] == rtt_height) {
+
+ pipe_surface_reference(&strb->surface, NULL);
+
+ strb->surface = screen->get_tex_surface(screen,
+ texture,
+ strb->rtt_face,
+ level,
+ strb->rtt_slice,
+ PIPE_BUFFER_USAGE_GPU_READ |
+ PIPE_BUFFER_USAGE_GPU_WRITE);
+#if 0
+ printf("-- alloc new surface %d x %d into tex %p\n",
+ strb->surface->width, strb->surface->height,
+ texture);
+#endif
+ break;
+ }
+ }
+ }
+}
+
+
+/**
+ * Update framebuffer state (color, depth, stencil, etc. buffers)
+ */
+static void
+update_framebuffer_state( struct st_context *st )
+{
+ struct pipe_framebuffer_state *framebuffer = &st->state.framebuffer;
+ struct gl_framebuffer *fb = st->ctx->DrawBuffer;
+ struct st_renderbuffer *strb;
+ GLuint i;
+
+ memset(framebuffer, 0, sizeof(*framebuffer));
+
+ framebuffer->width = fb->Width;
+ framebuffer->height = fb->Height;
+
+ /*printf("------ fb size %d x %d\n", fb->Width, fb->Height);*/
+
+ /* Examine Mesa's ctx->DrawBuffer->_ColorDrawBuffers state
+ * to determine which surfaces to draw to
+ */
+ framebuffer->num_cbufs = 0;
+ for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
+ strb = st_renderbuffer(fb->_ColorDrawBuffers[i]);
+
+ /*printf("--------- framebuffer surface rtt %p\n", strb->rtt);*/
+ if (strb->rtt) {
+ /* rendering to a GL texture, may have to update surface */
+ update_renderbuffer_surface(st, strb);
+ }
+
+ if (strb->surface) {
+ framebuffer->cbufs[framebuffer->num_cbufs] = strb->surface;
+ framebuffer->num_cbufs++;
+ }
+ }
+
+ strb = st_renderbuffer(fb->Attachment[BUFFER_DEPTH].Renderbuffer);
+ if (strb) {
+ strb = st_renderbuffer(strb->Base.Wrapped);
+ if (strb->rtt) {
+ /* rendering to a GL texture, may have to update surface */
+ update_renderbuffer_surface(st, strb);
+ }
+
+ framebuffer->zsbuf = strb->surface;
+ }
+ else {
+ strb = st_renderbuffer(fb->Attachment[BUFFER_STENCIL].Renderbuffer);
+ if (strb) {
+ strb = st_renderbuffer(strb->Base.Wrapped);
+ assert(strb->surface);
+ framebuffer->zsbuf = strb->surface;
+ }
+ }
+
+ cso_set_framebuffer(st->cso_context, framebuffer);
+
+ if (fb->_ColorDrawBufferIndexes[0] == BUFFER_FRONT_LEFT) {
+ if (st->frontbuffer_status == FRONT_STATUS_COPY_OF_BACK) {
+ /* XXX copy back buf to front? */
+ }
+ /* we're assuming we'll really draw to the front buffer */
+ st->frontbuffer_status = FRONT_STATUS_DIRTY;
+ }
+}
+
+
+const struct st_tracked_state st_update_framebuffer = {
+ "st_update_framebuffer", /* name */
+ { /* dirty */
+ _NEW_BUFFERS, /* mesa */
+ ST_NEW_FRAMEBUFFER, /* st */
+ },
+ update_framebuffer_state /* update */
+};
+