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/buffers.h"
  31 #include "main/context.h"
  32 #include "main/framebuffer.h"
  33 #include "main/matrix.h"
  34 #include "main/renderbuffer.h"
  35 #include "main/scissor.h"
  36 #include "st_public.h"
  37 #include "st_context.h"
  38 #include "st_cb_fbo.h"
  39 #include "pipe/p_defines.h"
  40 #include "pipe/p_context.h"
  41
  42
  43 struct st_framebuffer *
  44 st_create_framebuffer( const __GLcontextModes *visual,
  45                        enum pipe_format colorFormat,
  46                        enum pipe_format depthFormat,
  47                        enum pipe_format stencilFormat,
  48                        uint width, uint height,
  49                        void *private)
  50 {
  51    struct st_framebuffer *stfb = CALLOC_STRUCT(st_framebuffer);
  52    if (stfb) {
  53       _mesa_initialize_framebuffer(&stfb->Base, visual);
  54
  55       {
  56          /* fake frontbuffer */
  57          /* XXX allocation should only happen in the unusual case
  58             it's actually needed */
  59          struct gl_renderbuffer *rb
  60             = st_new_renderbuffer_fb(colorFormat);
  61          _mesa_add_renderbuffer(&stfb->Base, BUFFER_FRONT_LEFT, rb);
  62       }
  63
  64       if (visual->doubleBufferMode) {
  65          struct gl_renderbuffer *rb
  66             = st_new_renderbuffer_fb(colorFormat);
  67          _mesa_add_renderbuffer(&stfb->Base, BUFFER_BACK_LEFT, rb);
  68       }
  69
  70       if (visual->depthBits == 24 && visual->stencilBits == 8) {
  71          /* combined depth/stencil buffer */
  72          struct gl_renderbuffer *depthStencilRb
  73             = st_new_renderbuffer_fb(depthFormat);
  74          /* note: bind RB to two attachment points */
  75          _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthStencilRb);
  76          _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, depthStencilRb);
  77       }
  78       else {
  79          /* separate depth and/or stencil */
  80
  81          if (visual->depthBits == 32) {
  82             /* 32-bit depth buffer */
  83             struct gl_renderbuffer *depthRb
  84                = st_new_renderbuffer_fb(depthFormat);
  85             _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb);
  86          }
  87          else if (visual->depthBits == 24) {
  88             /* 24-bit depth buffer, ignore stencil bits */
  89             struct gl_renderbuffer *depthRb
  90                = st_new_renderbuffer_fb(depthFormat);
  91             _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb);
  92          }
  93          else if (visual->depthBits > 0) {
  94             /* 16-bit depth buffer */
  95             struct gl_renderbuffer *depthRb
  96                = st_new_renderbuffer_fb(depthFormat);
  97             _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb);
  98          }
  99
 100          if (visual->stencilBits > 0) {
 101             /* 8-bit stencil */
 102             struct gl_renderbuffer *stencilRb
 103                = st_new_renderbuffer_fb(stencilFormat);
 104             _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, stencilRb);
 105          }
 106       }
 107
 108       if (visual->accumRedBits > 0) {
 109          /* 16-bit/channel accum */
 110          struct gl_renderbuffer *accumRb
 111             = st_new_renderbuffer_fb(DEFAULT_ACCUM_PIPE_FORMAT);
 112          _mesa_add_renderbuffer(&stfb->Base, BUFFER_ACCUM, accumRb);
 113       }
 114
 115       stfb->Base.Initialized = GL_TRUE;
 116       stfb->InitWidth = width;
 117       stfb->InitHeight = height;
 118       stfb->Private = private;
 119    }
 120    return stfb;
 121 }
 122
 123
 124 void st_resize_framebuffer( struct st_framebuffer *stfb,
 125                             uint width, uint height )
 126 {
 127    if (stfb->Base.Width != width || stfb->Base.Height != height) {
 128       GET_CURRENT_CONTEXT(ctx);
 129       if (ctx) {
 130          if (stfb->InitWidth == 0 && stfb->InitHeight == 0) {
 131             /* didn't have a valid size until now */
 132             stfb->InitWidth = width;
 133             stfb->InitHeight = height;
 134             if (ctx->Viewport.Width <= 1) {
 135                /* set context's initial viewport/scissor size */
 136                _mesa_set_viewport(ctx, 0, 0, width, height);
 137                _mesa_set_scissor(ctx, 0, 0, width, height);
 138             }
 139          }
 140
 141          _mesa_resize_framebuffer(ctx, &stfb->Base, width, height);
 142
 143          assert(stfb->Base.Width == width);
 144          assert(stfb->Base.Height == height);
 145       }
 146    }
 147 }
 148
 149
 150 void st_unreference_framebuffer( struct st_framebuffer **stfb )
 151 {
 152    _mesa_unreference_framebuffer((struct gl_framebuffer **) stfb);
 153 }
 154
 155
 156
 157 /**
 158  * Return the pipe_surface for the given renderbuffer.
 159  */
 160 struct pipe_surface *
 161 st_get_framebuffer_surface(struct st_framebuffer *stfb, uint surfIndex)
 162 {
 163    struct st_renderbuffer *strb;
 164
 165    assert(surfIndex <= ST_SURFACE_DEPTH);
 166
 167    /* sanity checks, ST tokens should match Mesa tokens */
 168    assert(ST_SURFACE_FRONT_LEFT == BUFFER_FRONT_LEFT);
 169    assert(ST_SURFACE_BACK_RIGHT == BUFFER_BACK_RIGHT);
 170
 171    strb = st_renderbuffer(stfb->Base.Attachment[surfIndex].Renderbuffer);
 172    if (strb)
 173       return strb->surface;
 174    return NULL;
 175 }
 176
 177
 178 /**
 179  * This function is to be called prior to SwapBuffers on the given
 180  * framebuffer.  It checks if the current context is bound to the framebuffer
 181  * and flushes rendering if needed.
 182  */
 183 void
 184 st_notify_swapbuffers(struct st_framebuffer *stfb)
 185 {
 186    GET_CURRENT_CONTEXT(ctx);
 187
 188    if (ctx && ctx->DrawBuffer == &stfb->Base) {
 189       st_flush( ctx->st,
 190                 PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_SWAPBUFFERS,
 191                 NULL );
 192       ctx->st->frontbuffer_status = FRONT_STATUS_COPY_OF_BACK;
 193    }
 194 }
 195
 196
 197 /**
 198  * Quick hack - allows the winsys to inform the driver that surface
 199  * states are now undefined after a glXSwapBuffers or similar.
 200  */
 201 void
 202 st_notify_swapbuffers_complete(struct st_framebuffer *stfb)
 203 {
 204    GET_CURRENT_CONTEXT(ctx);
 205
 206    if (ctx && ctx->DrawBuffer == &stfb->Base) {
 207       struct st_renderbuffer *strb;
 208       int i;
 209
 210       for (i = 0; i < BUFFER_COUNT; i++) {
 211          if (stfb->Base.Attachment[i].Renderbuffer) {
 212             strb = st_renderbuffer(stfb->Base.Attachment[i].Renderbuffer);
 213             strb->surface->status = PIPE_SURFACE_STATUS_UNDEFINED;
 214          }
 215       }
 216    }
 217 }
 218
 219
 220 void *st_framebuffer_private( struct st_framebuffer *stfb )
 221 {
 222    return stfb->Private;
 223 }
 224