Subversion Repositories Kolibri OS

Rev

Go to most recent revision | Blame | Last modification | View Log | RSS feed

  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. #include "brw_context.h"
  29. #include "intel_buffers.h"
  30. #include "intel_fbo.h"
  31. #include "intel_mipmap_tree.h"
  32.  
  33. #include "main/fbobject.h"
  34. #include "main/framebuffer.h"
  35. #include "main/renderbuffer.h"
  36.  
  37. /**
  38.  * Check if we're about to draw into the front color buffer.
  39.  * If so, set the brw->front_buffer_dirty field to true.
  40.  */
  41. void
  42. intel_check_front_buffer_rendering(struct brw_context *brw)
  43. {
  44.    struct gl_context *ctx = &brw->ctx;
  45.    const struct gl_framebuffer *fb = ctx->DrawBuffer;
  46.    if (_mesa_is_winsys_fbo(fb)) {
  47.       /* drawing to window system buffer */
  48.       if (fb->_NumColorDrawBuffers > 0) {
  49.          if (fb->_ColorDrawBufferIndexes[0] == BUFFER_FRONT_LEFT) {
  50.             brw->front_buffer_dirty = true;
  51.          }
  52.       }
  53.    }
  54. }
  55.  
  56. static void
  57. intelDrawBuffer(struct gl_context * ctx, GLenum mode)
  58. {
  59.    if (ctx->DrawBuffer && _mesa_is_winsys_fbo(ctx->DrawBuffer)) {
  60.       struct brw_context *const brw = brw_context(ctx);
  61.       const bool was_front_buffer_rendering = brw->is_front_buffer_rendering;
  62.  
  63.       brw->is_front_buffer_rendering = (mode == GL_FRONT_LEFT)
  64.         || (mode == GL_FRONT) || (mode == GL_FRONT_AND_BACK);
  65.  
  66.       /* If we weren't front-buffer rendering before but we are now,
  67.        * invalidate our DRI drawable so we'll ask for new buffers
  68.        * (including the fake front) before we start rendering again.
  69.        */
  70.       if (!was_front_buffer_rendering && brw->is_front_buffer_rendering)
  71.          dri2InvalidateDrawable(brw->driContext->driDrawablePriv);
  72.    }
  73. }
  74.  
  75.  
  76. static void
  77. intelReadBuffer(struct gl_context * ctx, GLenum mode)
  78. {
  79.    if (ctx->DrawBuffer && _mesa_is_winsys_fbo(ctx->DrawBuffer)) {
  80.       struct brw_context *const brw = brw_context(ctx);
  81.       const bool was_front_buffer_reading = brw->is_front_buffer_reading;
  82.  
  83.       brw->is_front_buffer_reading = mode == GL_FRONT_LEFT || mode == GL_FRONT;
  84.  
  85.       /* If we weren't front-buffer reading before but we are now,
  86.        * invalidate our DRI drawable so we'll ask for new buffers
  87.        * (including the fake front) before we start reading again.
  88.        */
  89.       if (!was_front_buffer_reading && brw->is_front_buffer_reading)
  90.          dri2InvalidateDrawable(brw->driContext->driReadablePriv);
  91.    }
  92. }
  93.  
  94.  
  95. void
  96. intelInitBufferFuncs(struct dd_function_table *functions)
  97. {
  98.    functions->DrawBuffer = intelDrawBuffer;
  99.    functions->ReadBuffer = intelReadBuffer;
  100. }
  101.