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 #include "pipe/p_inlines.h"
  42
  43
  44 struct st_framebuffer *
  45 st_create_framebuffer( const __GLcontextModes *visual,
  46                        enum pipe_format colorFormat,
  47                        enum pipe_format depthFormat,
  48                        enum pipe_format stencilFormat,
  49                        uint width, uint height,
  50                        void *private)
  51 {
  52    struct st_framebuffer *stfb = CALLOC_STRUCT(st_framebuffer);
  53    if (stfb) {
  54       _mesa_initialize_framebuffer(&stfb->Base, visual);
  55
  56       {
  57          /* fake frontbuffer */
  58          /* XXX allocation should only happen in the unusual case
  59             it's actually needed */
  60          struct gl_renderbuffer *rb
  61             = st_new_renderbuffer_fb(colorFormat);
  62          _mesa_add_renderbuffer(&stfb->Base, BUFFER_FRONT_LEFT, rb);
  63       }
  64
  65       if (visual->doubleBufferMode) {
  66          struct gl_renderbuffer *rb
  67             = st_new_renderbuffer_fb(colorFormat);
  68          _mesa_add_renderbuffer(&stfb->Base, BUFFER_BACK_LEFT, rb);
  69       }
  70
  71       if (visual->depthBits == 24 && visual->stencilBits == 8) {
  72          /* combined depth/stencil buffer */
  73          struct gl_renderbuffer *depthStencilRb
  74             = st_new_renderbuffer_fb(depthFormat);
  75          /* note: bind RB to two attachment points */
  76          _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthStencilRb);
  77          _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, depthStencilRb);
  78       }
  79       else {
  80          /* separate depth and/or stencil */
  81
  82          if (visual->depthBits == 32) {
  83             /* 32-bit depth buffer */
  84             struct gl_renderbuffer *depthRb
  85                = st_new_renderbuffer_fb(depthFormat);
  86             _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb);
  87          }
  88          else if (visual->depthBits == 24) {
  89             /* 24-bit depth buffer, ignore stencil bits */
  90             struct gl_renderbuffer *depthRb
  91                = st_new_renderbuffer_fb(depthFormat);
  92             _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb);
  93          }
  94          else if (visual->depthBits > 0) {
  95             /* 16-bit depth buffer */
  96             struct gl_renderbuffer *depthRb
  97                = st_new_renderbuffer_fb(depthFormat);
  98             _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, depthRb);
  99          }
 100
 101          if (visual->stencilBits > 0) {
 102             /* 8-bit stencil */
 103             struct gl_renderbuffer *stencilRb
 104                = st_new_renderbuffer_fb(stencilFormat);
 105             _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, stencilRb);
 106          }
 107       }
 108
 109       if (visual->accumRedBits > 0) {
 110          /* 16-bit/channel accum */
 111          struct gl_renderbuffer *accumRb
 112             = st_new_renderbuffer_fb(DEFAULT_ACCUM_PIPE_FORMAT);
 113          _mesa_add_renderbuffer(&stfb->Base, BUFFER_ACCUM, accumRb);
 114       }
 115
 116       stfb->Base.Initialized = GL_TRUE;
 117       stfb->InitWidth = width;
 118       stfb->InitHeight = height;
 119       stfb->Private = private;
 120    }
 121    return stfb;
 122 }
 123
 124
 125 void st_resize_framebuffer( struct st_framebuffer *stfb,
 126                             uint width, uint height )
 127 {
 128    if (stfb->Base.Width != width || stfb->Base.Height != height) {
 129       GET_CURRENT_CONTEXT(ctx);
 130       if (ctx) {
 131          if (stfb->InitWidth == 0 && stfb->InitHeight == 0) {
 132             /* didn't have a valid size until now */
 133             stfb->InitWidth = width;
 134             stfb->InitHeight = height;
 135             if (ctx->Viewport.Width <= 1) {
 136                /* set context's initial viewport/scissor size */
 137                _mesa_set_viewport(ctx, 0, 0, width, height);
 138                _mesa_set_scissor(ctx, 0, 0, width, height);
 139             }
 140          }
 141
 142          _mesa_resize_framebuffer(ctx, &stfb->Base, width, height);
 143
 144          assert(stfb->Base.Width == width);
 145          assert(stfb->Base.Height == height);
 146       }
 147    }
 148 }
 149
 150
 151 void st_unreference_framebuffer( struct st_framebuffer **stfb )
 152 {
 153    _mesa_unreference_framebuffer((struct gl_framebuffer **) stfb);
 154 }
 155
 156
 157
 158 /**
 159  * Set/replace a framebuffer surface.
 160  * The user of the state tracker can use this instead of
 161  * st_resize_framebuffer() to provide new surfaces when a window is resized.
 162  */
 163 void
 164 st_set_framebuffer_surface(struct st_framebuffer *stfb,
 165                            uint surfIndex, struct pipe_surface *surf)
 166 {
 167    static const GLuint invalid_size = 9999999;
 168    struct st_renderbuffer *strb;
 169    GLuint width, height, i;
 170
 171    assert(surfIndex < BUFFER_COUNT);
 172
 173    strb = st_renderbuffer(stfb->Base.Attachment[surfIndex].Renderbuffer);
 174    assert(strb);
 175
 176    /* replace the renderbuffer's surface/texture pointers */
 177    pipe_surface_reference( &strb->surface, surf );
 178    pipe_texture_reference( &strb->texture, surf->texture );
 179
 180    /* update renderbuffer's width/height */
 181    strb->Base.Width = surf->width;
 182    strb->Base.Height = surf->height;
 183
 184    /* Try to update the framebuffer's width/height from the renderbuffer
 185     * sizes.  Before we start drawing, all the rbs _should_ be the same size.
 186     */
 187    width = height = invalid_size;
 188    for (i = 0; i < BUFFER_COUNT; i++) {
 189       if (stfb->Base.Attachment[i].Renderbuffer) {
 190          if (width == invalid_size) {
 191             width = stfb->Base.Attachment[i].Renderbuffer->Width;
 192             height = stfb->Base.Attachment[i].Renderbuffer->Height;
 193          }
 194          else if (width != stfb->Base.Attachment[i].Renderbuffer->Width ||
 195                   height != stfb->Base.Attachment[i].Renderbuffer->Height) {
 196             /* inconsistant renderbuffer sizes, bail out */
 197             return;
 198          }
 199       }
 200    }
 201
 202    if (width != invalid_size) {
 203       /* OK, the renderbuffers are of a consistant size, so update the
 204        * parent framebuffer's size.
 205        */
 206       stfb->Base.Width = width;
 207       stfb->Base.Height = height;
 208    }
 209 }
 210
 211
 212
 213 /**
 214  * Return the pipe_surface for the given renderbuffer.
 215  */
 216 struct pipe_surface *
 217 st_get_framebuffer_surface(struct st_framebuffer *stfb, uint surfIndex)
 218 {
 219    struct st_renderbuffer *strb;
 220
 221    assert(surfIndex <= ST_SURFACE_DEPTH);
 222
 223    /* sanity checks, ST tokens should match Mesa tokens */
 224    assert(ST_SURFACE_FRONT_LEFT == BUFFER_FRONT_LEFT);
 225    assert(ST_SURFACE_BACK_RIGHT == BUFFER_BACK_RIGHT);
 226
 227    strb = st_renderbuffer(stfb->Base.Attachment[surfIndex].Renderbuffer);
 228    if (strb)
 229       return strb->surface;
 230    return NULL;
 231 }
 232
 233 struct pipe_texture *
 234 st_get_framebuffer_texture(struct st_framebuffer *stfb, uint surfIndex)
 235 {
 236    struct st_renderbuffer *strb;
 237
 238    assert(surfIndex <= ST_SURFACE_DEPTH);
 239
 240    /* sanity checks, ST tokens should match Mesa tokens */
 241    assert(ST_SURFACE_FRONT_LEFT == BUFFER_FRONT_LEFT);
 242    assert(ST_SURFACE_BACK_RIGHT == BUFFER_BACK_RIGHT);
 243
 244    strb = st_renderbuffer(stfb->Base.Attachment[surfIndex].Renderbuffer);
 245    if (strb)
 246       return strb->texture;
 247    return NULL;
 248 }
 249
 250 /**
 251  * This function is to be called prior to SwapBuffers on the given
 252  * framebuffer.  It checks if the current context is bound to the framebuffer
 253  * and flushes rendering if needed.
 254  */
 255 void
 256 st_notify_swapbuffers(struct st_framebuffer *stfb)
 257 {
 258    GET_CURRENT_CONTEXT(ctx);
 259
 260    if (ctx && ctx->DrawBuffer == &stfb->Base) {
 261       st_flush( ctx->st,
 262                 PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_SWAPBUFFERS,
 263                 NULL );
 264       ctx->st->frontbuffer_status = FRONT_STATUS_COPY_OF_BACK;
 265    }
 266 }
 267
 268
 269 /**
 270  * Quick hack - allows the winsys to inform the driver that surface
 271  * states are now undefined after a glXSwapBuffers or similar.
 272  */
 273 void
 274 st_notify_swapbuffers_complete(struct st_framebuffer *stfb)
 275 {
 276    GET_CURRENT_CONTEXT(ctx);
 277
 278    if (ctx && ctx->DrawBuffer == &stfb->Base) {
 279       struct st_renderbuffer *strb;
 280       int i;
 281
 282       for (i = 0; i < BUFFER_COUNT; i++) {
 283          if (stfb->Base.Attachment[i].Renderbuffer) {
 284             strb = st_renderbuffer(stfb->Base.Attachment[i].Renderbuffer);
 285             strb->surface->status = PIPE_SURFACE_STATUS_UNDEFINED;
 286          }
 287       }
 288    }
 289 }
 290
 291
 292 void *st_framebuffer_private( struct st_framebuffer *stfb )
 293 {
 294    return stfb->Private;
 295 }
 296