2 * Mesa 3-D graphics library
5 * Copyright (C) 2010 LunarG Inc.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23 * DEALINGS IN THE SOFTWARE.
26 * Chia-I Wu <olv@lunarg.com>
29 #include "state_tracker/st_api.h"
31 #include "pipe/p_context.h"
32 #include "pipe/p_screen.h"
33 #include "util/u_memory.h"
34 #include "util/u_inlines.h"
36 #include "vg_manager.h"
37 #include "vg_context.h"
38 #include "vg_tracker.h" /* for st_resize_framebuffer */
42 * Flush the front buffer if the current context renders to the front buffer.
45 vg_manager_flush_frontbuffer(struct vg_context *ctx)
47 struct st_framebuffer *stfb = ctx->draw_buffer;
52 /* st_public.h is used */
54 struct pipe_screen *screen = ctx->pipe->screen;
55 if (screen->flush_frontbuffer) {
56 screen->flush_frontbuffer(screen,
57 stfb->strb->surface, ctx->pipe->priv);
62 switch (stfb->strb_att) {
63 case ST_ATTACHMENT_FRONT_LEFT:
64 case ST_ATTACHMENT_FRONT_RIGHT:
65 stfb->iface->flush_front(stfb->iface, stfb->strb_att);
73 * Re-validate the framebuffer.
76 vg_manager_validate_framebuffer(struct vg_context *ctx)
78 struct pipe_screen *screen = ctx->pipe->screen;
79 struct st_framebuffer *stfb = ctx->draw_buffer;
80 struct st_renderbuffer *rb;
81 struct pipe_texture *pt;
83 /* no binding surface */
87 /* st_public.h is used */
89 struct pipe_screen *screen = ctx->pipe->screen;
90 if (screen->update_buffer)
91 screen->update_buffer(screen, ctx->pipe->priv);
95 if (!p_atomic_read(&ctx->draw_buffer_invalid))
99 if (!stfb->iface->validate(stfb->iface, &stfb->strb_att, 1, &pt) || !pt)
103 if (rb->texture == pt) {
104 pipe_texture_reference(&pt, NULL);
108 /* unreference existing ones */
109 pipe_surface_reference(&rb->surface, NULL);
110 pipe_texture_reference(&rb->texture, NULL);
113 rb->surface = screen->get_tex_surface(screen, rb->texture, 0, 0, 0,
114 PIPE_BUFFER_USAGE_GPU_READ | PIPE_BUFFER_USAGE_GPU_WRITE);
116 rb->width = rb->surface->width;
117 rb->height = rb->surface->height;
119 st_resize_framebuffer(stfb, rb->width, rb->height);
121 p_atomic_set(&ctx->draw_buffer_invalid, FALSE);
126 vg_context_notify_invalid_framebuffer(struct st_context_iface *stctxi,
127 struct st_framebuffer_iface *stfbi)
129 struct vg_context *ctx = (struct vg_context *) stctxi;
130 p_atomic_set(&ctx->draw_buffer_invalid, TRUE);
134 vg_context_flush(struct st_context_iface *stctxi, unsigned flags,
135 struct pipe_fence_handle **fence)
137 struct vg_context *ctx = (struct vg_context *) stctxi;
138 ctx->pipe->flush(ctx->pipe, flags, fence);
139 if (flags & PIPE_FLUSH_RENDER_CACHE)
140 vg_manager_flush_frontbuffer(ctx);
144 vg_context_destroy(struct st_context_iface *stctxi)
146 struct vg_context *ctx = (struct vg_context *) stctxi;
147 vg_destroy_context(ctx);
150 static struct st_context_iface *
151 vg_api_create_context(struct st_api *stapi, struct st_manager *smapi,
152 const struct st_visual *visual,
153 struct st_context_iface *shared_stctxi)
155 struct vg_context *shared_ctx = (struct vg_context *) shared_stctxi;
156 struct vg_context *ctx;
157 struct pipe_context *pipe;
159 pipe = smapi->screen->context_create(smapi->screen, NULL);
162 ctx = vg_create_context(pipe, NULL, shared_ctx);
168 ctx->iface.destroy = vg_context_destroy;
170 ctx->iface.notify_invalid_framebuffer =
171 vg_context_notify_invalid_framebuffer;
172 ctx->iface.flush = vg_context_flush;
174 ctx->iface.teximage = NULL;
175 ctx->iface.copy = NULL;
177 ctx->iface.st_context_private = (void *) smapi;
182 static struct st_renderbuffer *
183 create_renderbuffer(enum pipe_format format)
185 struct st_renderbuffer *strb;
187 strb = CALLOC_STRUCT(st_renderbuffer);
189 strb->format = format;
195 destroy_renderbuffer(struct st_renderbuffer *strb)
197 pipe_surface_reference(&strb->surface, NULL);
198 pipe_texture_reference(&strb->texture, NULL);
203 * Decide the buffer to render to.
205 static enum st_attachment_type
206 choose_attachment(struct st_framebuffer_iface *stfbi)
208 enum st_attachment_type statt;
210 statt = stfbi->visual->render_buffer;
211 if (statt != ST_ATTACHMENT_INVALID) {
212 /* use the buffer given by the visual, unless it is unavailable */
213 if (!st_visual_have_buffers(stfbi->visual, 1 << statt)) {
215 case ST_ATTACHMENT_BACK_LEFT:
216 statt = ST_ATTACHMENT_FRONT_LEFT;
218 case ST_ATTACHMENT_BACK_RIGHT:
219 statt = ST_ATTACHMENT_FRONT_RIGHT;
225 if (!st_visual_have_buffers(stfbi->visual, 1 << statt))
226 statt = ST_ATTACHMENT_INVALID;
234 * Bind the context to the given framebuffers.
237 vg_context_bind_framebuffers(struct st_context_iface *stctxi,
238 struct st_framebuffer_iface *stdrawi,
239 struct st_framebuffer_iface *streadi)
241 struct vg_context *ctx = (struct vg_context *) stctxi;
242 struct st_framebuffer *stfb;
243 enum st_attachment_type strb_att;
245 /* the draw and read framebuffers must be the same */
246 if (stdrawi != streadi)
249 p_atomic_set(&ctx->draw_buffer_invalid, TRUE);
251 strb_att = (stdrawi) ? choose_attachment(stdrawi) : ST_ATTACHMENT_INVALID;
253 if (ctx->draw_buffer) {
254 stfb = ctx->draw_buffer;
256 /* free the existing fb */
258 stfb->strb_att != strb_att ||
259 stfb->strb->format != stdrawi->visual->color_format ||
260 stfb->dsrb->format != stdrawi->visual->depth_stencil_format) {
261 destroy_renderbuffer(stfb->strb);
262 destroy_renderbuffer(stfb->dsrb);
265 ctx->draw_buffer = NULL;
272 if (strb_att == ST_ATTACHMENT_INVALID)
275 /* create a new fb */
276 if (!ctx->draw_buffer) {
277 stfb = CALLOC_STRUCT(st_framebuffer);
281 stfb->strb = create_renderbuffer(stdrawi->visual->color_format);
287 stfb->dsrb = create_renderbuffer(stdrawi->visual->depth_stencil_format);
296 stfb->strb_att = strb_att;
298 ctx->draw_buffer = stfb;
301 ctx->draw_buffer->iface = stdrawi;
307 vg_api_make_current(struct st_api *stapi, struct st_context_iface *stctxi,
308 struct st_framebuffer_iface *stdrawi,
309 struct st_framebuffer_iface *streadi)
311 struct vg_context *ctx = (struct vg_context *) stctxi;
314 vg_context_bind_framebuffers(stctxi, stdrawi, streadi);
315 vg_set_current_context(ctx);
320 static struct st_context_iface *
321 vg_api_get_current(struct st_api *stapi)
323 struct vg_context *ctx = vg_current_context();
325 return (ctx) ? &ctx->iface : NULL;
329 vg_api_is_visual_supported(struct st_api *stapi,
330 const struct st_visual *visual)
332 /* the impl requires a depth/stencil buffer */
333 if (visual->depth_stencil_format == PIPE_FORMAT_NONE)
340 vg_api_get_proc_address(struct st_api *stapi, const char *procname)
343 return (st_proc_t) NULL;
347 vg_api_destroy(struct st_api *stapi)
352 static struct st_api *
353 vg_module_create_api(void)
355 struct st_api *stapi;
357 stapi = CALLOC_STRUCT(st_api);
359 stapi->destroy = vg_api_destroy;
360 stapi->get_proc_address = vg_api_get_proc_address;
361 stapi->is_visual_supported = vg_api_is_visual_supported;
363 stapi->create_context = vg_api_create_context;
364 stapi->make_current = vg_api_make_current;
365 stapi->get_current = vg_api_get_current;
371 PUBLIC const struct st_module st_module_OpenVG = {
372 .api = ST_API_OPENVG,
373 .create_api = vg_module_create_api,