src/mesa/drivers/dri/radeon/common_misc.c

   1 /**************************************************************************
   2
   3 Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
   4
   5 The Weather Channel (TM) funded Tungsten Graphics to develop the
   6 initial release of the Radeon 8500 driver under the XFree86 license.
   7 This notice must be preserved.
   8
   9 Permission is hereby granted, free of charge, to any person obtaining
  10 a copy of this software and associated documentation files (the
  11 "Software"), to deal in the Software without restriction, including
  12 without limitation the rights to use, copy, modify, merge, publish,
  13 distribute, sublicense, and/or sell copies of the Software, and to
  14 permit persons to whom the Software is furnished to do so, subject to
  15 the following conditions:
  16
  17 The above copyright notice and this permission notice (including the
  18 next paragraph) shall be included in all copies or substantial
  19 portions of the Software.
  20
  21 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  24 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  25 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28
  29 **************************************************************************/
  30
  31 /*
  32  * Authors:
  33  *   Keith Whitwell <keith@tungstengraphics.com>
  34  */
  35
  36 #include "main/glheader.h"
  37 #include "main/imports.h"
  38 #include "main/api_arrayelt.h"
  39 #include "main/enums.h"
  40 #include "main/colormac.h"
  41 #include "main/light.h"
  42 #include "main/framebuffer.h"
  43
  44 #include "swrast/swrast.h"
  45 #include "vbo/vbo.h"
  46 #include "tnl/tnl.h"
  47 #include "tnl/t_pipeline.h"
  48 #include "swrast_setup/swrast_setup.h"
  49
  50 #include "dri_util.h"
  51 #include "radeon_drm.h"
  52 #include "radeon_screen.h"
  53 #include "common_context.h"
  54 #include "common_misc.h"
  55 /* =============================================================
  56  * Scissoring
  57  */
  58
  59 static GLboolean intersect_rect(drm_clip_rect_t * out,
  60                                 drm_clip_rect_t * a, drm_clip_rect_t * b)
  61 {
  62         *out = *a;
  63         if (b->x1 > out->x1)
  64                 out->x1 = b->x1;
  65         if (b->y1 > out->y1)
  66                 out->y1 = b->y1;
  67         if (b->x2 < out->x2)
  68                 out->x2 = b->x2;
  69         if (b->y2 < out->y2)
  70                 out->y2 = b->y2;
  71         if (out->x1 >= out->x2)
  72                 return GL_FALSE;
  73         if (out->y1 >= out->y2)
  74                 return GL_FALSE;
  75         return GL_TRUE;
  76 }
  77
  78 void radeonRecalcScissorRects(radeonContextPtr radeon)
  79 {
  80         drm_clip_rect_t *out;
  81         int i;
  82
  83         /* Grow cliprect store?
  84          */
  85         if (radeon->state.scissor.numAllocedClipRects < radeon->numClipRects) {
  86                 while (radeon->state.scissor.numAllocedClipRects <
  87                        radeon->numClipRects) {
  88                         radeon->state.scissor.numAllocedClipRects += 1; /* zero case */
  89                         radeon->state.scissor.numAllocedClipRects *= 2;
  90                 }
  91
  92                 if (radeon->state.scissor.pClipRects)
  93                         FREE(radeon->state.scissor.pClipRects);
  94
  95                 radeon->state.scissor.pClipRects =
  96                     MALLOC(radeon->state.scissor.numAllocedClipRects *
  97                            sizeof(drm_clip_rect_t));
  98
  99                 if (radeon->state.scissor.pClipRects == NULL) {
 100                         radeon->state.scissor.numAllocedClipRects = 0;
 101                         return;
 102                 }
 103         }
 104
 105         out = radeon->state.scissor.pClipRects;
 106         radeon->state.scissor.numClipRects = 0;
 107
 108         for (i = 0; i < radeon->numClipRects; i++) {
 109                 if (intersect_rect(out,
 110                                    &radeon->pClipRects[i],
 111                                    &radeon->state.scissor.rect)) {
 112                         radeon->state.scissor.numClipRects++;
 113                         out++;
 114                 }
 115         }
 116 }
 117
 118 /**
 119  * Update cliprects and scissors.
 120  */
 121 void radeonSetCliprects(radeonContextPtr radeon)
 122 {
 123         __DRIdrawablePrivate *const drawable = radeon->dri.drawable;
 124         __DRIdrawablePrivate *const readable = radeon->dri.readable;
 125         GLframebuffer *const draw_fb = (GLframebuffer*)drawable->driverPrivate;
 126         GLframebuffer *const read_fb = (GLframebuffer*)readable->driverPrivate;
 127
 128         if (!radeon->radeonScreen->driScreen->dri2.enabled) {
 129                 if (draw_fb->_ColorDrawBufferIndexes[0] == BUFFER_BACK_LEFT) {
 130                         /* Can't ignore 2d windows if we are page flipping. */
 131                         if (drawable->numBackClipRects == 0 || radeon->doPageFlip ||
 132                             radeon->sarea->pfCurrentPage == 1) {
 133                                 radeon->numClipRects = drawable->numClipRects;
 134                                 radeon->pClipRects = drawable->pClipRects;
 135                         } else {
 136                                 radeon->numClipRects = drawable->numBackClipRects;
 137                                 radeon->pClipRects = drawable->pBackClipRects;
 138                         }
 139                 } else {
 140                         /* front buffer (or none, or multiple buffers */
 141                         radeon->numClipRects = drawable->numClipRects;
 142                         radeon->pClipRects = drawable->pClipRects;
 143                 }
 144         }
 145
 146         if ((draw_fb->Width != drawable->w) ||
 147             (draw_fb->Height != drawable->h)) {
 148                 _mesa_resize_framebuffer(radeon->glCtx, draw_fb,
 149                                          drawable->w, drawable->h);
 150                 draw_fb->Initialized = GL_TRUE;
 151         }
 152
 153         if (drawable != readable) {
 154                 if ((read_fb->Width != readable->w) ||
 155                     (read_fb->Height != readable->h)) {
 156                         _mesa_resize_framebuffer(radeon->glCtx, read_fb,
 157                                                  readable->w, readable->h);
 158                         read_fb->Initialized = GL_TRUE;
 159                 }
 160         }
 161
 162         if (radeon->state.scissor.enabled)
 163                 radeonRecalcScissorRects(radeon);
 164
 165         radeon->lastStamp = drawable->lastStamp;
 166 }
 167
 168 void radeonUpdateScissor( GLcontext *ctx )
 169 {
 170    radeonContextPtr rmesa = RADEON_CONTEXT(ctx);
 171
 172    if ( rmesa->dri.drawable ) {
 173       __DRIdrawablePrivate *dPriv = rmesa->dri.drawable;
 174
 175       int x = ctx->Scissor.X;
 176       int y = dPriv->h - ctx->Scissor.Y - ctx->Scissor.Height;
 177       int w = ctx->Scissor.X + ctx->Scissor.Width - 1;
 178       int h = dPriv->h - ctx->Scissor.Y - 1;
 179
 180       rmesa->state.scissor.rect.x1 = x + dPriv->x;
 181       rmesa->state.scissor.rect.y1 = y + dPriv->y;
 182       rmesa->state.scissor.rect.x2 = w + dPriv->x + 1;
 183       rmesa->state.scissor.rect.y2 = h + dPriv->y + 1;
 184
 185       radeonRecalcScissorRects( rmesa );
 186    }
 187 }