diff options
Diffstat (limited to 'src/mesa/state_tracker/st_atom_framebuffer.c')
| -rw-r--r-- | src/mesa/state_tracker/st_atom_framebuffer.c | 167 |
1 files changed, 167 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..80df3b0506 --- /dev/null +++ b/src/mesa/state_tracker/st_atom_framebuffer.c @@ -0,0 +1,167 @@ +/************************************************************************** + * + * 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, j; + + 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 (j = 0; j < MAX_DRAW_BUFFERS; j++) { + for (i = 0; i < fb->_NumColorDrawBuffers[j]; i++) { + strb = st_renderbuffer(fb->_ColorDrawBuffers[j][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); + } + + assert(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); + } + + assert(strb->surface); + 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->_ColorDrawBufferMask[0] & BUFFER_BIT_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 */ +}; + |