--- /dev/null
+/*
+ * 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,
+};
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