xserver and mesa git update 28-12-2010

1 files changed, 924 insertions, 0 deletions

diff --git a/mesalib/src/mesa/state_tracker/st_manager.c b/mesalib/src/mesa/state_tracker/st_manager.c
new file mode 100644
index 000000000..74d402daa
--- /dev/null
+++ b/mesalib/src/mesa/state_tracker/st_manager.c
@@ -0,0 +1,924 @@
+/*

+ * Mesa 3-D graphics library

+ * Version:  7.9

+ *

+ * Copyright (C) 2010 LunarG Inc.

+ *

+ * 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, sublicense,

+ * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL

+ * THE AUTHORS OR COPYRIGHT HOLDERS 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:

+ *    Chia-I Wu <olv@lunarg.com>

+ */

+

+#include "state_tracker/st_gl_api.h"

+

+#include "pipe/p_context.h"

+#include "pipe/p_screen.h"

+#include "util/u_format.h"

+#include "util/u_pointer.h"

+#include "util/u_inlines.h"

+#include "util/u_atomic.h"

+#include "util/u_surface.h"

+

+#include "main/mtypes.h"

+#include "main/context.h"

+#include "main/texobj.h"

+#include "main/teximage.h"

+#include "main/texstate.h"

+#include "main/framebuffer.h"

+#include "main/fbobject.h"

+#include "main/renderbuffer.h"

+#include "main/version.h"

+#include "st_texture.h"

+

+#include "st_context.h"

+#include "st_format.h"

+#include "st_cb_fbo.h"

+#include "st_cb_flush.h"

+#include "st_manager.h"

+

+/**

+ * Cast wrapper to convert a struct gl_framebuffer to an st_framebuffer.

+ * Return NULL if the struct gl_framebuffer is a user-created framebuffer.

+ * We'll only return non-null for window system framebuffers.

+ * Note that this function may fail.

+ */

+static INLINE struct st_framebuffer *

+st_ws_framebuffer(struct gl_framebuffer *fb)

+{

+   /* FBO cannot be casted.  See st_new_framebuffer */

+   return (struct st_framebuffer *) ((fb && !fb->Name) ? fb : NULL);

+}

+

+/**

+ * Map an attachment to a buffer index.

+ */

+static INLINE gl_buffer_index

+attachment_to_buffer_index(enum st_attachment_type statt)

+{

+   gl_buffer_index index;

+

+   switch (statt) {

+   case ST_ATTACHMENT_FRONT_LEFT:

+      index = BUFFER_FRONT_LEFT;

+      break;

+   case ST_ATTACHMENT_BACK_LEFT:

+      index = BUFFER_BACK_LEFT;

+      break;

+   case ST_ATTACHMENT_FRONT_RIGHT:

+      index = BUFFER_FRONT_RIGHT;

+      break;

+   case ST_ATTACHMENT_BACK_RIGHT:

+      index = BUFFER_BACK_RIGHT;

+      break;

+   case ST_ATTACHMENT_DEPTH_STENCIL:

+      index = BUFFER_DEPTH;

+      break;

+   case ST_ATTACHMENT_ACCUM:

+      index = BUFFER_ACCUM;

+      break;

+   case ST_ATTACHMENT_SAMPLE:

+   default:

+      index = BUFFER_COUNT;

+      break;

+   }

+

+   return index;

+}

+

+/**

+ * Map a buffer index to an attachment.

+ */

+static INLINE enum st_attachment_type

+buffer_index_to_attachment(gl_buffer_index index)

+{

+   enum st_attachment_type statt;

+

+   switch (index) {

+   case BUFFER_FRONT_LEFT:

+      statt = ST_ATTACHMENT_FRONT_LEFT;

+      break;

+   case BUFFER_BACK_LEFT:

+      statt = ST_ATTACHMENT_BACK_LEFT;

+      break;

+   case BUFFER_FRONT_RIGHT:

+      statt = ST_ATTACHMENT_FRONT_RIGHT;

+      break;

+   case BUFFER_BACK_RIGHT:

+      statt = ST_ATTACHMENT_BACK_RIGHT;

+      break;

+   case BUFFER_DEPTH:

+      statt = ST_ATTACHMENT_DEPTH_STENCIL;

+      break;

+   case BUFFER_ACCUM:

+      statt = ST_ATTACHMENT_ACCUM;

+      break;

+   default:

+      statt = ST_ATTACHMENT_INVALID;

+      break;

+   }

+

+   return statt;

+}

+

+/**

+ * Validate a framebuffer to make sure up-to-date pipe_textures are used.

+ */

+static void

+st_framebuffer_validate(struct st_framebuffer *stfb, struct st_context *st)

+{

+   struct pipe_context *pipe = st->pipe;

+   struct pipe_resource *textures[ST_ATTACHMENT_COUNT];

+   uint width, height;

+   unsigned i;

+   boolean changed = FALSE;

+

+   if (!p_atomic_read(&stfb->revalidate))

+      return;

+

+   /* validate the fb */

+   if (!stfb->iface->validate(stfb->iface, stfb->statts, stfb->num_statts, textures))

+      return;

+

+   width = stfb->Base.Width;

+   height = stfb->Base.Height;

+

+   for (i = 0; i < stfb->num_statts; i++) {

+      struct st_renderbuffer *strb;

+      struct pipe_surface *ps, surf_tmpl;

+      gl_buffer_index idx;

+

+      if (!textures[i])

+         continue;

+

+      idx = attachment_to_buffer_index(stfb->statts[i]);

+      if (idx >= BUFFER_COUNT) {

+         pipe_resource_reference(&textures[i], NULL);

+         continue;

+      }

+

+      strb = st_renderbuffer(stfb->Base.Attachment[idx].Renderbuffer);

+      assert(strb);

+      if (strb->texture == textures[i]) {

+         pipe_resource_reference(&textures[i], NULL);

+         continue;

+      }

+

+      memset(&surf_tmpl, 0, sizeof(surf_tmpl));

+      u_surface_default_template(&surf_tmpl, textures[i],

+                                 PIPE_BIND_RENDER_TARGET);

+      ps = pipe->create_surface(pipe, textures[i], &surf_tmpl);

+      if (ps) {

+         pipe_surface_reference(&strb->surface, ps);

+         pipe_resource_reference(&strb->texture, ps->texture);

+         /* ownership transfered */

+         pipe_surface_reference(&ps, NULL);

+

+         changed = TRUE;

+

+         strb->Base.Width = strb->surface->width;

+         strb->Base.Height = strb->surface->height;

+

+         width = strb->Base.Width;

+         height = strb->Base.Height;

+      }

+

+      pipe_resource_reference(&textures[i], NULL);

+   }

+

+   if (changed) {

+      st->dirty.st |= ST_NEW_FRAMEBUFFER;

+      _mesa_resize_framebuffer(st->ctx, &stfb->Base, width, height);

+

+      assert(stfb->Base.Width == width);

+      assert(stfb->Base.Height == height);

+   }

+

+   p_atomic_set(&stfb->revalidate, FALSE);

+}

+

+/**

+ * Update the attachments to validate by looping the existing renderbuffers.

+ */

+static void

+st_framebuffer_update_attachments(struct st_framebuffer *stfb)

+{

+   gl_buffer_index idx;

+

+   stfb->num_statts = 0;

+   for (idx = 0; idx < BUFFER_COUNT; idx++) {

+      struct st_renderbuffer *strb;

+      enum st_attachment_type statt;

+

+      strb = st_renderbuffer(stfb->Base.Attachment[idx].Renderbuffer);

+      if (!strb || strb->software)

+         continue;

+

+      statt = buffer_index_to_attachment(idx);

+      if (statt != ST_ATTACHMENT_INVALID &&

+          st_visual_have_buffers(stfb->iface->visual, 1 << statt))

+         stfb->statts[stfb->num_statts++] = statt;

+   }

+

+   p_atomic_set(&stfb->revalidate, TRUE);

+}

+

+/**

+ * Add a renderbuffer to the framebuffer.

+ */

+static boolean

+st_framebuffer_add_renderbuffer(struct st_framebuffer *stfb,

+                                gl_buffer_index idx)

+{

+   struct gl_renderbuffer *rb;

+   enum pipe_format format;

+   int samples;

+   boolean sw;

+

+   if (!stfb->iface)

+      return FALSE;

+

+   /* do not distinguish depth/stencil buffers */

+   if (idx == BUFFER_STENCIL)

+      idx = BUFFER_DEPTH;

+

+   switch (idx) {

+   case BUFFER_DEPTH:

+      format = stfb->iface->visual->depth_stencil_format;

+      sw = FALSE;

+      break;

+   case BUFFER_ACCUM:

+      format = stfb->iface->visual->accum_format;

+      sw = TRUE;

+      break;

+   default:

+      format = stfb->iface->visual->color_format;

+      sw = FALSE;

+      break;

+   }

+

+   if (format == PIPE_FORMAT_NONE)

+      return FALSE;

+

+   samples = stfb->iface->visual->samples;

+   if (!samples)

+      samples = st_get_msaa();

+

+   rb = st_new_renderbuffer_fb(format, samples, sw);

+   if (!rb)

+      return FALSE;

+

+   if (idx != BUFFER_DEPTH) {

+      _mesa_add_renderbuffer(&stfb->Base, idx, rb);

+   }

+   else {

+      if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 0))

+         _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, rb);

+      if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 1))

+         _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, rb);

+   }

+

+   return TRUE;

+}

+

+/**

+ * Intialize a struct gl_config from a visual.

+ */

+static void

+st_visual_to_context_mode(const struct st_visual *visual,

+                          struct gl_config *mode)

+{

+   memset(mode, 0, sizeof(*mode));

+

+   if (st_visual_have_buffers(visual, ST_ATTACHMENT_BACK_LEFT_MASK))

+      mode->doubleBufferMode = GL_TRUE;

+   if (st_visual_have_buffers(visual,

+            ST_ATTACHMENT_FRONT_RIGHT_MASK | ST_ATTACHMENT_BACK_RIGHT_MASK))

+      mode->stereoMode = GL_TRUE;

+

+   if (visual->color_format != PIPE_FORMAT_NONE) {

+      mode->rgbMode = GL_TRUE;

+

+      mode->redBits =

+         util_format_get_component_bits(visual->color_format,

+               UTIL_FORMAT_COLORSPACE_RGB, 0);

+      mode->greenBits =

+         util_format_get_component_bits(visual->color_format,

+               UTIL_FORMAT_COLORSPACE_RGB, 1);

+      mode->blueBits =

+         util_format_get_component_bits(visual->color_format,

+               UTIL_FORMAT_COLORSPACE_RGB, 2);

+      mode->alphaBits =

+         util_format_get_component_bits(visual->color_format,

+               UTIL_FORMAT_COLORSPACE_RGB, 3);

+

+      mode->rgbBits = mode->redBits +

+         mode->greenBits + mode->blueBits + mode->alphaBits;

+   }

+

+   if (visual->depth_stencil_format != PIPE_FORMAT_NONE) {

+      mode->depthBits =

+         util_format_get_component_bits(visual->depth_stencil_format,

+               UTIL_FORMAT_COLORSPACE_ZS, 0);

+      mode->stencilBits =

+         util_format_get_component_bits(visual->depth_stencil_format,

+               UTIL_FORMAT_COLORSPACE_ZS, 1);

+

+      mode->haveDepthBuffer = mode->depthBits > 0;

+      mode->haveStencilBuffer = mode->stencilBits > 0;

+   }

+

+   if (visual->accum_format != PIPE_FORMAT_NONE) {

+      mode->haveAccumBuffer = GL_TRUE;

+

+      mode->accumRedBits =

+         util_format_get_component_bits(visual->accum_format,

+               UTIL_FORMAT_COLORSPACE_RGB, 0);

+      mode->accumGreenBits =

+         util_format_get_component_bits(visual->accum_format,

+               UTIL_FORMAT_COLORSPACE_RGB, 1);

+      mode->accumBlueBits =

+         util_format_get_component_bits(visual->accum_format,

+               UTIL_FORMAT_COLORSPACE_RGB, 2);

+      mode->accumAlphaBits =

+         util_format_get_component_bits(visual->accum_format,

+               UTIL_FORMAT_COLORSPACE_RGB, 3);

+   }

+

+   if (visual->samples) {

+      mode->sampleBuffers = 1;

+      mode->samples = visual->samples;

+   }

+}

+

+/**

+ * Determine the default draw or read buffer from a visual.

+ */

+static void

+st_visual_to_default_buffer(const struct st_visual *visual,

+                            GLenum *buffer, GLint *index)

+{

+   enum st_attachment_type statt;

+   GLenum buf;

+   gl_buffer_index idx;

+

+   statt = visual->render_buffer;

+   /* do nothing if an invalid render buffer is specified */

+   if (statt == ST_ATTACHMENT_INVALID ||

+       !st_visual_have_buffers(visual, 1 << statt))

+      return;

+

+   switch (statt) {

+   case ST_ATTACHMENT_FRONT_LEFT:

+      buf = GL_FRONT_LEFT;

+      idx = BUFFER_FRONT_LEFT;

+      break;

+   case ST_ATTACHMENT_BACK_LEFT:

+      buf = GL_BACK_LEFT;

+      idx = BUFFER_BACK_LEFT;

+      break;

+   case ST_ATTACHMENT_FRONT_RIGHT:

+      buf = GL_FRONT_RIGHT;

+      idx = BUFFER_FRONT_RIGHT;

+      break;

+   case ST_ATTACHMENT_BACK_RIGHT:

+      buf = GL_BACK_RIGHT;

+      idx = BUFFER_BACK_RIGHT;

+      break;

+   default:

+      buf = GL_NONE;

+      idx = BUFFER_COUNT;

+      break;

+   }

+

+   if (buf != GL_NONE) {

+      if (buffer)

+         *buffer = buf;

+      if (index)

+         *index = idx;

+   }

+}

+

+/**

+ * Create a framebuffer from a manager interface.

+ */

+static struct st_framebuffer *

+st_framebuffer_create(struct st_framebuffer_iface *stfbi)

+{

+   struct st_framebuffer *stfb;

+   struct gl_config mode;

+   gl_buffer_index idx;

+

+   stfb = CALLOC_STRUCT(st_framebuffer);

+   if (!stfb)

+      return NULL;

+

+   /* for FBO-only context */

+   if (!stfbi) {

+      struct gl_framebuffer *base = _mesa_get_incomplete_framebuffer();

+

+      stfb->Base = *base;

+

+      return stfb;

+   }

+

+   st_visual_to_context_mode(stfbi->visual, &mode);

+   _mesa_initialize_window_framebuffer(&stfb->Base, &mode);

+

+   /* modify the draw/read buffers of the fb */

+   st_visual_to_default_buffer(stfbi->visual, &stfb->Base.ColorDrawBuffer[0],

+         &stfb->Base._ColorDrawBufferIndexes[0]);

+   st_visual_to_default_buffer(stfbi->visual, &stfb->Base.ColorReadBuffer,

+         &stfb->Base._ColorReadBufferIndex);

+

+   stfb->iface = stfbi;

+

+   /* add the color buffer */

+   idx = stfb->Base._ColorDrawBufferIndexes[0];

+   if (!st_framebuffer_add_renderbuffer(stfb, idx)) {

+      FREE(stfb);

+      return NULL;

+   }

+

+   st_framebuffer_add_renderbuffer(stfb, BUFFER_DEPTH);

+   st_framebuffer_add_renderbuffer(stfb, BUFFER_ACCUM);

+

+   st_framebuffer_update_attachments(stfb);

+

+   stfb->Base.Initialized = GL_TRUE;

+

+   return stfb;

+}

+

+/**

+ * Reference a framebuffer.

+ */

+static void

+st_framebuffer_reference(struct st_framebuffer **ptr,

+                         struct st_framebuffer *stfb)

+{

+   struct gl_framebuffer *fb = &stfb->Base;

+   _mesa_reference_framebuffer((struct gl_framebuffer **) ptr, fb);

+}

+

+static void

+st_context_notify_invalid_framebuffer(struct st_context_iface *stctxi,

+                                      struct st_framebuffer_iface *stfbi)

+{

+   struct st_context *st = (struct st_context *) stctxi;

+   struct st_framebuffer *stfb;

+

+   /* either draw or read winsys fb */

+   stfb = st_ws_framebuffer(st->ctx->WinSysDrawBuffer);

+   if (!stfb || stfb->iface != stfbi)

+      stfb = st_ws_framebuffer(st->ctx->WinSysReadBuffer);

+

+   if (stfb && stfb->iface == stfbi) {

+      p_atomic_set(&stfb->revalidate, TRUE);

+   }

+   else {

+      /* This function is probably getting called when we've detected a

+       * change in a window's size but the currently bound context is

+       * not bound to that window.

+       * If the st_framebuffer_iface structure had a pointer to the

+       * corresponding st_framebuffer we'd be able to handle this.

+       */

+   }

+}

+

+static void

+st_context_flush(struct st_context_iface *stctxi, unsigned flags,

+                 struct pipe_fence_handle **fence)

+{

+   struct st_context *st = (struct st_context *) stctxi;

+   st_flush(st, flags, fence);

+   if (flags & PIPE_FLUSH_RENDER_CACHE)

+      st_manager_flush_frontbuffer(st);

+}

+

+static boolean

+st_context_teximage(struct st_context_iface *stctxi, enum st_texture_type target,

+                    int level, enum pipe_format internal_format,

+                    struct pipe_resource *tex, boolean mipmap)

+{

+   struct st_context *st = (struct st_context *) stctxi;

+   struct gl_context *ctx = st->ctx;

+   struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);

+   struct gl_texture_object *texObj;

+   struct gl_texture_image *texImage;

+   struct st_texture_object *stObj;

+   struct st_texture_image *stImage;

+   GLenum internalFormat;

+   GLuint width, height, depth;

+

+   switch (target) {

+   case ST_TEXTURE_1D:

+      target = GL_TEXTURE_1D;

+      break;

+   case ST_TEXTURE_2D:

+      target = GL_TEXTURE_2D;

+      break;

+   case ST_TEXTURE_3D:

+      target = GL_TEXTURE_3D;

+      break;

+   case ST_TEXTURE_RECT:

+      target = GL_TEXTURE_RECTANGLE_ARB;

+      break;

+   default:

+      return FALSE;

+      break;

+   }

+

+   texObj = _mesa_select_tex_object(ctx, texUnit, target);

+   _mesa_lock_texture(ctx, texObj);

+

+   stObj = st_texture_object(texObj);

+   /* switch to surface based */

+   if (!stObj->surface_based) {

+      _mesa_clear_texture_object(ctx, texObj);

+      stObj->surface_based = GL_TRUE;

+   }

+

+   texImage = _mesa_get_tex_image(ctx, texObj, target, level);

+   stImage = st_texture_image(texImage);

+   if (tex) {

+      gl_format texFormat;

+

+      /*

+       * XXX When internal_format and tex->format differ, st_finalize_texture

+       * needs to allocate a new texture with internal_format and copy the

+       * texture here into the new one.  It will result in surface_copy being

+       * called on surfaces whose formats differ.

+       *

+       * To avoid that, internal_format is (wrongly) ignored here.  A sane fix

+       * is to use a sampler view.

+       */

+      if (!st_sampler_compat_formats(tex->format, internal_format))

+	 internal_format = tex->format;

+     

+      if (util_format_get_component_bits(internal_format,

+               UTIL_FORMAT_COLORSPACE_RGB, 3) > 0)

+         internalFormat = GL_RGBA;

+      else

+         internalFormat = GL_RGB;

+

+      texFormat = st_ChooseTextureFormat(ctx, internalFormat,

+                                         GL_RGBA, GL_UNSIGNED_BYTE);

+

+      _mesa_init_teximage_fields(ctx, target, texImage,

+                                 tex->width0, tex->height0, 1, 0,

+                                 internalFormat, texFormat);

+

+      width = tex->width0;

+      height = tex->height0;

+      depth = tex->depth0;

+

+      /* grow the image size until we hit level = 0 */

+      while (level > 0) {

+         if (width != 1)

+            width <<= 1;

+         if (height != 1)

+            height <<= 1;

+         if (depth != 1)

+            depth <<= 1;

+         level--;

+      }

+   }

+   else {

+      _mesa_clear_texture_image(ctx, texImage);

+      width = height = depth = 0;

+   }

+

+   pipe_resource_reference(&stImage->pt, tex);

+   stObj->width0 = width;

+   stObj->height0 = height;

+   stObj->depth0 = depth;

+

+   _mesa_dirty_texobj(ctx, texObj, GL_TRUE);

+   _mesa_unlock_texture(ctx, texObj);

+   

+   return TRUE;

+}

+

+static void

+st_context_copy(struct st_context_iface *stctxi,

+                struct st_context_iface *stsrci, unsigned mask)

+{

+   struct st_context *st = (struct st_context *) stctxi;

+   struct st_context *src = (struct st_context *) stsrci;

+

+   _mesa_copy_context(src->ctx, st->ctx, mask);

+}

+

+static boolean

+st_context_share(struct st_context_iface *stctxi,

+                 struct st_context_iface *stsrci)

+{

+   struct st_context *st = (struct st_context *) stctxi;

+   struct st_context *src = (struct st_context *) stsrci;

+

+   return _mesa_share_state(st->ctx, src->ctx);

+}

+

+static void

+st_context_destroy(struct st_context_iface *stctxi)

+{

+   struct st_context *st = (struct st_context *) stctxi;

+   st_destroy_context(st);

+}

+

+static struct st_context_iface *

+st_api_create_context(struct st_api *stapi, struct st_manager *smapi,

+                      const struct st_context_attribs *attribs,

+                      struct st_context_iface *shared_stctxi)

+{

+   struct st_context *shared_ctx = (struct st_context *) shared_stctxi;

+   struct st_context *st;

+   struct pipe_context *pipe;

+   struct gl_config mode;

+   gl_api api;

+

+   if (!(stapi->profile_mask & (1 << attribs->profile)))

+      return NULL;

+

+   switch (attribs->profile) {

+   case ST_PROFILE_DEFAULT:

+      api = API_OPENGL;

+      break;

+   case ST_PROFILE_OPENGL_ES1:

+      api = API_OPENGLES;

+      break;

+   case ST_PROFILE_OPENGL_ES2:

+      api = API_OPENGLES2;

+      break;

+   case ST_PROFILE_OPENGL_CORE:

+   default:

+      return NULL;

+      break;

+   }

+

+   pipe = smapi->screen->context_create(smapi->screen, NULL);

+   if (!pipe)

+      return NULL;

+

+   st_visual_to_context_mode(&attribs->visual, &mode);

+   st = st_create_context(api, pipe, &mode, shared_ctx);

+   if (!st) {

+      pipe->destroy(pipe);

+      return NULL;

+   }

+

+   /* need to perform version check */

+   if (attribs->major > 1 || attribs->minor > 0) {

+      _mesa_compute_version(st->ctx);

+

+      if (st->ctx->VersionMajor < attribs->major ||

+          st->ctx->VersionMajor < attribs->minor) {

+         st_destroy_context(st);

+         return NULL;

+      }

+   }

+

+   st->invalidate_on_gl_viewport =

+      smapi->get_param(smapi, ST_MANAGER_BROKEN_INVALIDATE);

+

+   st->iface.destroy = st_context_destroy;

+   st->iface.notify_invalid_framebuffer =

+      st_context_notify_invalid_framebuffer;

+   st->iface.flush = st_context_flush;

+   st->iface.teximage = st_context_teximage;

+   st->iface.copy = st_context_copy;

+   st->iface.share = st_context_share;

+   st->iface.st_context_private = (void *) smapi;

+

+   return &st->iface;

+}

+

+static boolean

+st_api_make_current(struct st_api *stapi, struct st_context_iface *stctxi,

+                    struct st_framebuffer_iface *stdrawi,

+                    struct st_framebuffer_iface *streadi)

+{

+   struct st_context *st = (struct st_context *) stctxi;

+   struct st_framebuffer *stdraw, *stread, *stfb;

+   boolean ret;

+

+   _glapi_check_multithread();

+

+   if (st) {

+      /* reuse/create the draw fb */

+      stfb = st_ws_framebuffer(st->ctx->WinSysDrawBuffer);

+      if (stfb && stfb->iface == stdrawi) {

+         stdraw = NULL;

+         st_framebuffer_reference(&stdraw, stfb);

+      }

+      else {

+         stdraw = st_framebuffer_create(stdrawi);

+      }

+

+      /* reuse/create the read fb */

+      stfb = st_ws_framebuffer(st->ctx->WinSysReadBuffer);

+      if (!stfb || stfb->iface != streadi)

+         stfb = stdraw;

+      if (stfb && stfb->iface == streadi) {

+         stread = NULL;

+         st_framebuffer_reference(&stread, stfb);

+      }

+      else {

+         stread = st_framebuffer_create(streadi);

+      }

+

+      if (stdraw && stread) {

+         st_framebuffer_validate(stdraw, st);

+         if (stread != stdraw)

+            st_framebuffer_validate(stread, st);

+

+         /* modify the draw/read buffers of the context */

+         if (stdraw->iface) {

+            st_visual_to_default_buffer(stdraw->iface->visual,

+                  &st->ctx->Color.DrawBuffer[0], NULL);

+         }

+         if (stread->iface) {

+            st_visual_to_default_buffer(stread->iface->visual,

+                  &st->ctx->Pixel.ReadBuffer, NULL);

+         }

+

+         ret = _mesa_make_current(st->ctx, &stdraw->Base, &stread->Base);

+      }

+      else {

+         ret = FALSE;

+      }

+

+      st_framebuffer_reference(&stdraw, NULL);

+      st_framebuffer_reference(&stread, NULL);

+   }

+   else {

+      ret = _mesa_make_current(NULL, NULL, NULL);

+   }

+

+   return ret;

+}

+

+static struct st_context_iface *

+st_api_get_current(struct st_api *stapi)

+{

+   GET_CURRENT_CONTEXT(ctx);

+   struct st_context *st = (ctx) ? ctx->st : NULL;

+

+   return (st) ? &st->iface : NULL;

+}

+

+static st_proc_t

+st_api_get_proc_address(struct st_api *stapi, const char *procname)

+{

+   return (st_proc_t) _glapi_get_proc_address(procname);

+}

+

+static void

+st_api_destroy(struct st_api *stapi)

+{

+}

+

+/**

+ * Flush the front buffer if the current context renders to the front buffer.

+ */

+void

+st_manager_flush_frontbuffer(struct st_context *st)

+{

+   struct st_framebuffer *stfb = st_ws_framebuffer(st->ctx->DrawBuffer);

+   struct st_renderbuffer *strb = NULL;

+

+   if (stfb)

+      strb = st_renderbuffer(stfb->Base.Attachment[BUFFER_FRONT_LEFT].Renderbuffer);

+   if (!strb)

+      return;

+

+   /* never a dummy fb */

+   assert(stfb->iface);

+   stfb->iface->flush_front(stfb->iface, ST_ATTACHMENT_FRONT_LEFT);

+}

+

+/**

+ * Return the surface of an EGLImage.

+ * FIXME: I think this should operate on resources, not surfaces

+ */

+struct pipe_surface *

+st_manager_get_egl_image_surface(struct st_context *st,

+                                 void *eglimg, unsigned usage)

+{

+   struct st_manager *smapi =

+      (struct st_manager *) st->iface.st_context_private;

+   struct st_egl_image stimg;

+   struct pipe_surface *ps, surf_tmpl;

+

+   if (!smapi || !smapi->get_egl_image)

+      return NULL;

+

+   memset(&stimg, 0, sizeof(stimg));

+   if (!smapi->get_egl_image(smapi, eglimg, &stimg))

+      return NULL;

+

+   memset(&surf_tmpl, 0, sizeof(surf_tmpl));

+   surf_tmpl.format = stimg.texture->format;

+   surf_tmpl.usage = usage;

+   surf_tmpl.u.tex.level = stimg.level;

+   surf_tmpl.u.tex.first_layer = stimg.layer;

+   surf_tmpl.u.tex.last_layer = stimg.layer;

+   ps = st->pipe->create_surface(st->pipe, stimg.texture, &surf_tmpl);

+   pipe_resource_reference(&stimg.texture, NULL);

+

+   return ps;

+}

+

+/**

+ * Re-validate the framebuffers.

+ */

+void

+st_manager_validate_framebuffers(struct st_context *st)

+{

+   struct st_framebuffer *stdraw = st_ws_framebuffer(st->ctx->DrawBuffer);

+   struct st_framebuffer *stread = st_ws_framebuffer(st->ctx->ReadBuffer);

+

+   if (stdraw)

+      st_framebuffer_validate(stdraw, st);

+   if (stread && stread != stdraw)

+      st_framebuffer_validate(stread, st);

+}

+

+/**

+ * Add a color renderbuffer on demand.

+ */

+boolean

+st_manager_add_color_renderbuffer(struct st_context *st, struct gl_framebuffer *fb,

+                                  gl_buffer_index idx)

+{

+   struct st_framebuffer *stfb = st_ws_framebuffer(fb);

+

+   /* FBO */

+   if (!stfb)

+      return FALSE;

+

+   if (stfb->Base.Attachment[idx].Renderbuffer)

+      return TRUE;

+

+   switch (idx) {

+   case BUFFER_FRONT_LEFT:

+   case BUFFER_BACK_LEFT:

+   case BUFFER_FRONT_RIGHT:

+   case BUFFER_BACK_RIGHT:

+      break;

+   default:

+      return FALSE;

+      break;

+   }

+

+   if (!st_framebuffer_add_renderbuffer(stfb, idx))

+      return FALSE;

+

+   st_framebuffer_update_attachments(stfb);

+   st_invalidate_state(st->ctx, _NEW_BUFFERS);

+

+   return TRUE;

+}

+

+static const struct st_api st_gl_api = {

+   "Mesa " MESA_VERSION_STRING,

+   ST_API_OPENGL,

+#if FEATURE_GL

+   ST_PROFILE_DEFAULT_MASK |

+#endif

+#if FEATURE_ES1

+   ST_PROFILE_OPENGL_ES1_MASK |

+#endif

+#if FEATURE_ES2

+   ST_PROFILE_OPENGL_ES2_MASK |

+#endif

+   0,

+   st_api_destroy,

+   st_api_get_proc_address,

+   st_api_create_context,

+   st_api_make_current,

+   st_api_get_current,

+};

+

+struct st_api *

+st_gl_api_create(void)

+{

+   return (struct st_api *) &st_gl_api;

+}