st/vega: Implement st_api.h.

There is currently no user of this new interface.  As the inteface can
coexist with st_public.h, everthing should work as before.

src/gallium/state_trackers/vega/Makefile

@@ -25,6 +25,7 @@ VG_SOURCES = \
            api_transform.c \
            vgu.c        \
            vg_context.c \
+           vg_manager.c \
            vg_state.c   \
            vg_tracker.c \
            vg_translate.c \

src/gallium/state_trackers/vega/api_context.c

@@ -26,6 +26,7 @@
 
 #include "VG/openvg.h"
 
+#include "vg_manager.h"
 #include "vg_context.h"
 
 #include "pipe/p_context.h"
@@ -55,6 +56,8 @@ void vgFlush(void)
 
    pipe = ctx->pipe;
    pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
+
+   vg_manager_flush_frontbuffer(ctx);
 }
 
 void vgFinish(void)

src/gallium/state_trackers/vega/api_masks.c

@@ -117,10 +117,6 @@ clear_with_quad(struct vg_context *st, float x0, float y0,
      x1, y1);
    */
 
-   if (st->pipe->screen && st->pipe->screen->update_buffer)
-      st->pipe->screen->update_buffer( st->pipe->screen,
-                                       st->pipe->priv );
-
    cso_save_blend(st->cso_context);
    cso_save_rasterizer(st->cso_context);
    cso_save_fragment_shader(st->cso_context);

src/gallium/state_trackers/vega/vg_context.c

@@ -32,6 +32,7 @@
 #include "shader.h"
 #include "asm_util.h"
 #include "st_inlines.h"
+#include "vg_manager.h"
 
 #include "pipe/p_context.h"
 #include "util/u_inlines.h"
@@ -305,6 +306,8 @@ static void update_clip_state(struct vg_context *ctx)
 
 void vg_validate_state(struct vg_context *ctx)
 {
+   vg_manager_validate_framebuffer(ctx);
+
    if ((ctx->state.dirty & BLEND_DIRTY)) {
       struct pipe_blend_state *blend = &ctx->state.g3d.blend;
       memset(blend, 0, sizeof(struct pipe_blend_state));

src/gallium/state_trackers/vega/vg_context.h

@@ -33,6 +33,7 @@
 #include "pipe/p_state.h"
 #include "util/u_pointer.h"
 #include "util/u_math.h"
+#include "state_tracker/st_api.h"
 
 #include "cso_cache/cso_hash.h"
 #include "cso_cache/cso_context.h"
@@ -58,6 +59,9 @@ struct st_framebuffer {
 
    struct pipe_texture *blend_texture;
 
+   struct st_framebuffer_iface *iface;
+   enum st_attachment_type strb_att;
+
    void *privateData;
 };
 
@@ -84,6 +88,8 @@ enum dirty_state {
 
 struct vg_context
 {
+   struct st_context_iface iface;
+
    struct pipe_context *pipe;
 
    struct {
@@ -101,6 +107,7 @@ struct vg_context
    VGErrorCode _error;
 
    struct st_framebuffer *draw_buffer;
+   int32_t draw_buffer_invalid;
 
    struct cso_hash *owned_objects[VG_OBJECT_LAST];
 

src/gallium/state_trackers/vega/vg_manager.c

@@ -0,0 +1,373 @@
+/*
+ * 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
+ * BRIAN PAUL 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_api.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_screen.h"
+#include "util/u_memory.h"
+#include "util/u_inlines.h"
+
+#include "vg_manager.h"
+#include "vg_context.h"
+#include "vg_tracker.h" /* for st_resize_framebuffer */
+#include "image.h"
+
+/**
+ * Flush the front buffer if the current context renders to the front buffer.
+ */
+void
+vg_manager_flush_frontbuffer(struct vg_context *ctx)
+{
+   struct st_framebuffer *stfb = ctx->draw_buffer;
+
+   if (!stfb)
+      return;
+
+   /* st_public.h is used */
+   if (!stfb->iface) {
+      struct pipe_screen *screen = ctx->pipe->screen;
+      if (screen->flush_frontbuffer) {
+         screen->flush_frontbuffer(screen,
+               stfb->strb->surface, ctx->pipe->priv);
+      }
+      return;
+   }
+
+   switch (stfb->strb_att) {
+   case ST_ATTACHMENT_FRONT_LEFT:
+   case ST_ATTACHMENT_FRONT_RIGHT:
+      stfb->iface->flush_front(stfb->iface, stfb->strb_att);
+      break;
+   default:
+      break;
+   }
+}
+
+/**
+ * Re-validate the framebuffer.
+ */
+void
+vg_manager_validate_framebuffer(struct vg_context *ctx)
+{
+   struct pipe_screen *screen = ctx->pipe->screen;
+   struct st_framebuffer *stfb = ctx->draw_buffer;
+   struct st_renderbuffer *rb;
+   struct pipe_texture *pt;
+
+   /* no binding surface */
+   if (!stfb)
+      return;
+
+   /* st_public.h is used */
+   if (!stfb->iface) {
+      struct pipe_screen *screen = ctx->pipe->screen;
+      if (screen->update_buffer)
+         screen->update_buffer(screen, ctx->pipe->priv);
+      return;
+   }
+
+   if (!p_atomic_read(&ctx->draw_buffer_invalid))
+      return;
+
+   /* validate the fb */
+   if (!stfb->iface->validate(stfb->iface, &stfb->strb_att, 1, &pt) || !pt)
+      return;
+
+   rb = stfb->strb;
+   if (rb->texture == pt) {
+      pipe_texture_reference(&pt, NULL);
+      return;
+   }
+
+   /* unreference existing ones */
+   pipe_surface_reference(&rb->surface, NULL);
+   pipe_texture_reference(&rb->texture, NULL);
+
+   rb->texture = pt;
+   rb->surface = screen->get_tex_surface(screen, rb->texture, 0, 0, 0,
+         PIPE_BUFFER_USAGE_GPU_READ | PIPE_BUFFER_USAGE_GPU_WRITE);
+
+   rb->width = rb->surface->width;
+   rb->height = rb->surface->height;
+
+   st_resize_framebuffer(stfb, rb->width, rb->height);
+
+   p_atomic_set(&ctx->draw_buffer_invalid, FALSE);
+}
+
+
+static void
+vg_context_notify_invalid_framebuffer(struct st_context_iface *stctxi,
+                                      struct st_framebuffer_iface *stfbi)
+{
+   struct vg_context *ctx = (struct vg_context *) stctxi;
+   p_atomic_set(&ctx->draw_buffer_invalid, TRUE);
+}
+
+static void
+vg_context_flush(struct st_context_iface *stctxi, unsigned flags,
+                 struct pipe_fence_handle **fence)
+{
+   struct vg_context *ctx = (struct vg_context *) stctxi;
+   ctx->pipe->flush(ctx->pipe, flags, fence);
+   if (flags & PIPE_FLUSH_RENDER_CACHE)
+      vg_manager_flush_frontbuffer(ctx);
+}
+
+static void
+vg_context_destroy(struct st_context_iface *stctxi)
+{
+   struct vg_context *ctx = (struct vg_context *) stctxi;
+   vg_destroy_context(ctx);
+}
+
+static struct st_context_iface *
+vg_api_create_context(struct st_api *stapi, struct st_manager *smapi,
+                      const struct st_visual *visual,
+                      struct st_context_iface *shared_stctxi)
+{
+   struct vg_context *shared_ctx = (struct vg_context *) shared_stctxi;
+   struct vg_context *ctx;
+   struct pipe_context *pipe;
+
+   pipe = smapi->screen->context_create(smapi->screen, NULL);
+   if (!pipe)
+      return NULL;
+   ctx = vg_create_context(pipe, NULL, shared_ctx);
+   if (!ctx) {
+      pipe->destroy(pipe);
+      return NULL;
+   }
+
+   ctx->iface.destroy = vg_context_destroy;
+
+   ctx->iface.notify_invalid_framebuffer =
+      vg_context_notify_invalid_framebuffer;
+   ctx->iface.flush = vg_context_flush;
+
+   ctx->iface.teximage = NULL;
+   ctx->iface.copy = NULL;
+
+   ctx->iface.st_context_private = (void *) smapi;
+
+   return &ctx->iface;
+}
+
+static struct st_renderbuffer *
+create_renderbuffer(enum pipe_format format)
+{
+   struct st_renderbuffer *strb;
+
+   strb = CALLOC_STRUCT(st_renderbuffer);
+   if (strb)
+      strb->format = format;
+
+   return strb;
+}
+
+static void
+destroy_renderbuffer(struct st_renderbuffer *strb)
+{
+   pipe_surface_reference(&strb->surface, NULL);
+   pipe_texture_reference(&strb->texture, NULL);
+   free(strb);
+}
+
+/**
+ * Decide the buffer to render to.
+ */
+static enum st_attachment_type
+choose_attachment(struct st_framebuffer_iface *stfbi)
+{
+   enum st_attachment_type statt;
+
+   statt = stfbi->visual->render_buffer;
+   if (statt != ST_ATTACHMENT_INVALID) {
+      /* use the buffer given by the visual, unless it is unavailable */
+      if (!st_visual_have_buffers(stfbi->visual, 1 << statt)) {
+         switch (statt) {
+         case ST_ATTACHMENT_BACK_LEFT:
+            statt = ST_ATTACHMENT_FRONT_LEFT;
+            break;
+         case ST_ATTACHMENT_BACK_RIGHT:
+            statt = ST_ATTACHMENT_FRONT_RIGHT;
+            break;
+         default:
+            break;
+         }
+
+         if (!st_visual_have_buffers(stfbi->visual, 1 << statt))
+            statt = ST_ATTACHMENT_INVALID;
+      }
+   }
+
+   return statt;
+}
+
+/**
+ * Bind the context to the given framebuffers.
+ */
+static boolean
+vg_context_bind_framebuffers(struct st_context_iface *stctxi,
+                             struct st_framebuffer_iface *stdrawi,
+                             struct st_framebuffer_iface *streadi)
+{
+   struct vg_context *ctx = (struct vg_context *) stctxi;
+   struct st_framebuffer *stfb;
+   enum st_attachment_type strb_att;
+
+   /* the draw and read framebuffers must be the same */
+   if (stdrawi != streadi)
+      return FALSE;
+
+   p_atomic_set(&ctx->draw_buffer_invalid, TRUE);
+
+   strb_att = (stdrawi) ? choose_attachment(stdrawi) : ST_ATTACHMENT_INVALID;
+
+   if (ctx->draw_buffer) {
+      stfb = ctx->draw_buffer;
+
+      /* free the existing fb */
+      if (!stdrawi ||
+          stfb->strb_att != strb_att ||
+          stfb->strb->format != stdrawi->visual->color_format ||
+          stfb->dsrb->format != stdrawi->visual->depth_stencil_format) {
+         destroy_renderbuffer(stfb->strb);
+         destroy_renderbuffer(stfb->dsrb);
+         free(stfb);
+
+         ctx->draw_buffer = NULL;
+      }
+   }
+
+   if (!stdrawi)
+      return TRUE;
+
+   if (strb_att == ST_ATTACHMENT_INVALID)
+      return FALSE;
+
+   /* create a new fb */
+   if (!ctx->draw_buffer) {
+      stfb = CALLOC_STRUCT(st_framebuffer);
+      if (!stfb)
+         return FALSE;
+
+      stfb->strb = create_renderbuffer(stdrawi->visual->color_format);
+      if (!stfb->strb) {
+         free(stfb);
+         return FALSE;
+      }
+
+      stfb->dsrb = create_renderbuffer(stdrawi->visual->depth_stencil_format);
+      if (!stfb->dsrb) {
+         free(stfb->strb);
+         free(stfb);
+         return FALSE;
+      }
+
+      stfb->width = 0;
+      stfb->height = 0;
+      stfb->strb_att = strb_att;
+
+      ctx->draw_buffer = stfb;
+   }
+
+   ctx->draw_buffer->iface = stdrawi;
+
+   return TRUE;
+}
+
+static boolean
+vg_api_make_current(struct st_api *stapi, struct st_context_iface *stctxi,
+                    struct st_framebuffer_iface *stdrawi,
+                    struct st_framebuffer_iface *streadi)
+{
+   struct vg_context *ctx = (struct vg_context *) stctxi;
+
+   if (stctxi)
+      vg_context_bind_framebuffers(stctxi, stdrawi, streadi);
+   vg_set_current_context(ctx);
+
+   return TRUE;
+}
+
+static struct st_context_iface *
+vg_api_get_current(struct st_api *stapi)
+{
+   struct vg_context *ctx = vg_current_context();
+
+   return (ctx) ? &ctx->iface : NULL;
+}
+
+static boolean
+vg_api_is_visual_supported(struct st_api *stapi,
+                           const struct st_visual *visual)
+{
+   /* the impl requires a depth/stencil buffer */
+   if (visual->depth_stencil_format == PIPE_FORMAT_NONE)
+      return FALSE;
+
+   return TRUE;
+}
+
+static st_proc_t
+vg_api_get_proc_address(struct st_api *stapi, const char *procname)
+{
+   /* TODO */
+   return (st_proc_t) NULL;
+}
+
+static void
+vg_api_destroy(struct st_api *stapi)
+{
+   free(stapi);
+}
+
+static struct st_api *
+vg_module_create_api(void)
+{
+   struct st_api *stapi;
+
+   stapi = CALLOC_STRUCT(st_api);
+   if (stapi) {
+      stapi->destroy = vg_api_destroy;
+      stapi->get_proc_address = vg_api_get_proc_address;
+      stapi->is_visual_supported = vg_api_is_visual_supported;
+
+      stapi->create_context = vg_api_create_context;
+      stapi->make_current = vg_api_make_current;
+      stapi->get_current = vg_api_get_current;
+   }
+
+   return stapi;
+}
+
+PUBLIC const struct st_module st_module_OpenVG = {
+   .api = ST_API_OPENVG,
+   .create_api = vg_module_create_api,
+};

src/gallium/state_trackers/vega/vg_manager.h

@@ -0,0 +1,40 @@
+/*
+ * 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
+ * BRIAN PAUL 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>
+ */
+
+#ifndef VG_MANAGER_H
+#define VG_MANAGER_H
+
+#include "state_tracker/st_api.h"
+#include "vg_context.h"
+
+void
+vg_manager_flush_frontbuffer(struct vg_context *ctx);
+
+void
+vg_manager_validate_framebuffer(struct vg_context *ctx);
+
+#endif /* VG_MANAGER_H */