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 "st_public.h"
  36 #include "st_context.h"
  37 #include "st_cb_fbo.h"
  38 #include "pipe/p_defines.h"
  39 #include "pipe/p_context.h"
  40
  41
  42 struct st_framebuffer *
  43 st_create_framebuffer( const __GLcontextModes *visual,
  44                        enum pipe_format colorFormat,
  45                        enum pipe_format depthFormat,
  46                        enum pipe_format stencilFormat,
  47                        uint width, uint height,
  48                        void *private)
  49 {
  50    struct st_framebuffer *stfb = CALLOC_STRUCT(st_framebuffer);
  51    if (stfb) {
  52       _mesa_initialize_framebuffer(&stfb->Base, visual);
  53
  54       {
  55          /* fake frontbuffer */
  56          /* XXX allocation should only happen in the unusual case
  57             it's actually needed */
  58          struct gl_renderbuffer *rb
  59             = st_new_renderbuffer_fb(colorFormat);
  60          _mesa_add_renderbuffer(&stfb->Base, BUFFER_FRONT_LEFT, rb);
  61       }
  62
  63       if (visual->doubleBufferMode) {
  64          struct gl_renderbuffer *rb
  65             = st_new_renderbuffer_fb(colorFormat);
  66          _mesa_add_renderbuffer(&stfb->Base, BUFFER_BACK_LEFT, rb);
  67       }
  68
  69       if (visual->depthBits == 24 && visual->stencilBits == 8) {
  70          /* combined depth/stencil buffer */
  71          struct gl_renderbuffer *depthStencilRb
  72             = st_new_renderbuffer_fb(depthFormat);
  73          /* note: bind RB to two attachment points */
  74          _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthStencilRb);
  75          _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, depthStencilRb);
  76       }
  77       else {
  78          /* separate depth and/or stencil */
  79
  80          if (visual->depthBits == 32) {
  81             /* 32-bit depth buffer */
  82             struct gl_renderbuffer *depthRb
  83                = st_new_renderbuffer_fb(depthFormat);
  84             _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb);
  85          }
  86          else if (visual->depthBits == 24) {
  87             /* 24-bit depth buffer, ignore stencil bits */
  88             struct gl_renderbuffer *depthRb
  89                = st_new_renderbuffer_fb(depthFormat);
  90             _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb);
  91          }
  92          else if (visual->depthBits > 0) {
  93             /* 16-bit depth buffer */
  94             struct gl_renderbuffer *depthRb
  95                = st_new_renderbuffer_fb(depthFormat);
  96             _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb);
  97          }
  98
  99          if (visual->stencilBits > 0) {
 100             /* 8-bit stencil */
 101             struct gl_renderbuffer *stencilRb
 102                = st_new_renderbuffer_fb(stencilFormat);
 103             _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, stencilRb);
 104          }
 105       }
 106
 107       if (visual->accumRedBits > 0) {
 108          /* 16-bit/channel accum */
 109          struct gl_renderbuffer *accumRb
 110             = st_new_renderbuffer_fb(PIPE_FORMAT_R16G16B16A16_SNORM);
 111          _mesa_add_renderbuffer(&stfb->Base, BUFFER_ACCUM, accumRb);
 112       }
 113
 114       stfb->Base.Initialized = GL_TRUE;
 115       stfb->InitWidth = width;
 116       stfb->InitHeight = height;
 117       stfb->Private = private;
 118    }
 119    return stfb;
 120 }
 121
 122
 123 void st_resize_framebuffer( struct st_framebuffer *stfb,
 124                             uint width, uint height )
 125 {
 126    if (stfb->Base.Width != width || stfb->Base.Height != height) {
 127       GET_CURRENT_CONTEXT(ctx);
 128       if (ctx) {
 129          if (stfb->InitWidth == 0 && stfb->InitHeight == 0) {
 130             /* didn't have a valid size until now */
 131             stfb->InitWidth = width;
 132             stfb->InitHeight = height;
 133             if (ctx->Viewport.Width <= 1) {
 134                /* set context's initial viewport/scissor size */
 135                _mesa_set_viewport(ctx, 0, 0, width, height);
 136                _mesa_set_scissor(ctx, 0, 0, width, height);
 137             }
 138          }
 139
 140          _mesa_resize_framebuffer(ctx, &stfb->Base, width, height);
 141
 142          assert(stfb->Base.Width == width);
 143          assert(stfb->Base.Height == height);
 144       }
 145    }
 146 }
 147
 148
 149 void st_unreference_framebuffer( struct st_framebuffer **stfb )
 150 {
 151    _mesa_unreference_framebuffer((struct gl_framebuffer **) stfb);
 152 }
 153
 154
 155
 156 /**
 157  * Return the pipe_surface for the given renderbuffer.
 158  */
 159 struct pipe_surface *
 160 st_get_framebuffer_surface(struct st_framebuffer *stfb, uint surfIndex)
 161 {
 162    struct st_renderbuffer *strb;
 163
 164    assert(surfIndex <= ST_SURFACE_DEPTH);
 165
 166    /* sanity checks, ST tokens should match Mesa tokens */
 167    assert(ST_SURFACE_FRONT_LEFT == BUFFER_FRONT_LEFT);
 168    assert(ST_SURFACE_BACK_RIGHT == BUFFER_BACK_RIGHT);
 169
 170    strb = st_renderbuffer(stfb->Base.Attachment[surfIndex].Renderbuffer);
 171    if (strb)
 172       return strb->surface;
 173    return NULL;
 174 }
 175
 176
 177 /**
 178  * This function is to be called prior to SwapBuffers on the given
 179  * framebuffer.  It checks if the current context is bound to the framebuffer
 180  * and flushes rendering if needed.
 181  */
 182 void
 183 st_notify_swapbuffers(struct st_framebuffer *stfb)
 184 {
 185    GET_CURRENT_CONTEXT(ctx);
 186
 187    if (ctx && ctx->DrawBuffer == &stfb->Base) {
 188       st_flush( ctx->st,
 189                 PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_SWAPBUFFERS);
 190    }
 191 }
 192
 193
 194 /**
 195  * Quick hack - allows the winsys to inform the driver that surface
 196  * states are now undefined after a glXSwapBuffers or similar.
 197  */
 198 void
 199 st_notify_swapbuffers_complete(struct st_framebuffer *stfb)
 200 {
 201    GET_CURRENT_CONTEXT(ctx);
 202
 203    if (ctx && ctx->DrawBuffer == &stfb->Base) {
 204       struct st_renderbuffer *strb;
 205       int i;
 206
 207       for (i = 0; i < BUFFER_COUNT; i++) {
 208          if (stfb->Base.Attachment[i].Renderbuffer) {
 209             strb = st_renderbuffer(stfb->Base.Attachment[i].Renderbuffer);
 210             strb->surface->status = PIPE_SURFACE_STATUS_UNDEFINED;
 211          }
 212       }
 213    }
 214 }
 215
 216
 217 void *st_framebuffer_private( struct st_framebuffer *stfb )
 218 {
 219    return stfb->Private;
 220 }
 221