src/mesa/state_tracker/st_framebuffer.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 #include "main/imports.h"
  30 #include "main/context.h"
  31 #include "main/framebuffer.h"
  32 #include "main/renderbuffer.h"
  33 #include "st_public.h"
  34 #include "st_context.h"
  35 #include "st_cb_fbo.h"
  36 #include "pipe/p_defines.h"
  37 #include "pipe/p_context.h"
  38
  39
  40 struct st_framebuffer *
  41 st_create_framebuffer( const __GLcontextModes *visual,
  42                        enum pipe_format colorFormat,
  43                        enum pipe_format depthFormat,
  44                        enum pipe_format stencilFormat,
  45                        uint width, uint height,
  46                        void *private)
  47 {
  48    struct st_framebuffer *stfb = CALLOC_STRUCT(st_framebuffer);
  49    if (stfb) {
  50       _mesa_initialize_framebuffer(&stfb->Base, visual);
  51
  52       {
  53          /* fake frontbuffer */
  54          /* XXX allocation should only happen in the unusual case
  55             it's actually needed */
  56          struct gl_renderbuffer *rb
  57             = st_new_renderbuffer_fb(colorFormat);
  58          _mesa_add_renderbuffer(&stfb->Base, BUFFER_FRONT_LEFT, rb);
  59       }
  60
  61       if (visual->doubleBufferMode) {
  62          struct gl_renderbuffer *rb
  63             = st_new_renderbuffer_fb(colorFormat);
  64          _mesa_add_renderbuffer(&stfb->Base, BUFFER_BACK_LEFT, rb);
  65       }
  66
  67       if (visual->depthBits == 24 && visual->stencilBits == 8) {
  68          /* combined depth/stencil buffer */
  69          struct gl_renderbuffer *depthStencilRb
  70             = st_new_renderbuffer_fb(depthFormat);
  71          /* note: bind RB to two attachment points */
  72          _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthStencilRb);
  73          _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, depthStencilRb);
  74       }
  75       else {
  76          /* separate depth and/or stencil */
  77
  78          if (visual->depthBits == 32) {
  79             /* 32-bit depth buffer */
  80             struct gl_renderbuffer *depthRb
  81                = st_new_renderbuffer_fb(depthFormat);
  82             _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb);
  83          }
  84          else if (visual->depthBits == 24) {
  85             /* 24-bit depth buffer, ignore stencil bits */
  86             struct gl_renderbuffer *depthRb
  87                = st_new_renderbuffer_fb(depthFormat);
  88             _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb);
  89          }
  90          else if (visual->depthBits > 0) {
  91             /* 16-bit depth buffer */
  92             struct gl_renderbuffer *depthRb
  93                = st_new_renderbuffer_fb(depthFormat);
  94             _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb);
  95          }
  96
  97          if (visual->stencilBits > 0) {
  98             /* 8-bit stencil */
  99             struct gl_renderbuffer *stencilRb
 100                = st_new_renderbuffer_fb(stencilFormat);
 101             _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, stencilRb);
 102          }
 103       }
 104
 105       if (visual->accumRedBits > 0) {
 106          /* 16-bit/channel accum */
 107          struct gl_renderbuffer *accumRb
 108             = st_new_renderbuffer_fb(PIPE_FORMAT_R16G16B16A16_SNORM);
 109          _mesa_add_renderbuffer(&stfb->Base, BUFFER_ACCUM, accumRb);
 110       }
 111
 112       stfb->Base.Initialized = GL_TRUE;
 113       stfb->InitWidth = width;
 114       stfb->InitHeight = height;
 115       stfb->Private = private;
 116    }
 117    return stfb;
 118 }
 119
 120
 121 void st_resize_framebuffer( struct st_framebuffer *stfb,
 122                             uint width, uint height )
 123 {
 124    if (stfb->Base.Width != width || stfb->Base.Height != height) {
 125       GET_CURRENT_CONTEXT(ctx);
 126       if (ctx) {
 127          _mesa_resize_framebuffer(ctx, &stfb->Base, width, height);
 128
 129          assert(stfb->Base.Width == width);
 130          assert(stfb->Base.Height == height);
 131       }
 132    }
 133 }
 134
 135
 136 void st_unreference_framebuffer( struct st_framebuffer **stfb )
 137 {
 138    _mesa_unreference_framebuffer((struct gl_framebuffer **) stfb);
 139 }
 140
 141
 142
 143 /**
 144  * Return the pipe_surface for the given renderbuffer.
 145  */
 146 struct pipe_surface *
 147 st_get_framebuffer_surface(struct st_framebuffer *stfb, uint surfIndex)
 148 {
 149    struct st_renderbuffer *strb;
 150
 151    assert(surfIndex <= ST_SURFACE_DEPTH);
 152
 153    /* sanity checks, ST tokens should match Mesa tokens */
 154    assert(ST_SURFACE_FRONT_LEFT == BUFFER_FRONT_LEFT);
 155    assert(ST_SURFACE_BACK_RIGHT == BUFFER_BACK_RIGHT);
 156
 157    strb = st_renderbuffer(stfb->Base.Attachment[surfIndex].Renderbuffer);
 158    if (strb)
 159       return strb->surface;
 160    return NULL;
 161 }
 162
 163
 164 /**
 165  * This function is to be called prior to SwapBuffers on the given
 166  * framebuffer.  It checks if the current context is bound to the framebuffer
 167  * and flushes rendering if needed.
 168  */
 169 void
 170 st_notify_swapbuffers(struct st_framebuffer *stfb)
 171 {
 172    GET_CURRENT_CONTEXT(ctx);
 173
 174    if (ctx && ctx->DrawBuffer == &stfb->Base) {
 175       st_flush( ctx->st,
 176                 PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_SWAPBUFFERS);
 177    }
 178 }
 179
 180
 181 /**
 182  * Quick hack - allows the winsys to inform the driver that surface
 183  * states are now undefined after a glXSwapBuffers or similar.
 184  */
 185 void
 186 st_notify_swapbuffers_complete(struct st_framebuffer *stfb)
 187 {
 188    GET_CURRENT_CONTEXT(ctx);
 189
 190    if (ctx && ctx->DrawBuffer == &stfb->Base) {
 191       struct st_renderbuffer *strb;
 192       int i;
 193
 194       for (i = 0; i < BUFFER_COUNT; i++) {
 195          if (stfb->Base.Attachment[i].Renderbuffer) {
 196             strb = st_renderbuffer(stfb->Base.Attachment[i].Renderbuffer);
 197             strb->surface->status = PIPE_SURFACE_STATUS_UNDEFINED;
 198          }
 199       }
 200    }
 201 }
 202
 203
 204 void *st_framebuffer_private( struct st_framebuffer *stfb )
 205 {
 206    return stfb->Private;
 207 }
 208