src/mesa/drivers/dri/r300/radeon_state.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 "glheader.h"
  37 #include "imports.h"
  38 #include "api_arrayelt.h"
  39 #include "enums.h"
  40 #include "colormac.h"
  41 #include "light.h"
  42
  43 #include "swrast/swrast.h"
  44 #include "array_cache/acache.h"
  45 #include "tnl/tnl.h"
  46 #include "tnl/t_pipeline.h"
  47 #include "swrast_setup/swrast_setup.h"
  48
  49 #include "r200_context.h"
  50 #include "radeon_ioctl.h"
  51 #include "radeon_state.h"
  52 #include "r200_state.h"
  53 #include "r300_ioctl.h"
  54
  55
  56 /* =============================================================
  57  * Scissoring
  58  */
  59
  60 static GLboolean intersect_rect(drm_clip_rect_t * out,
  61                                 drm_clip_rect_t * a, drm_clip_rect_t * b)
  62 {
  63         *out = *a;
  64         if (b->x1 > out->x1)
  65                 out->x1 = b->x1;
  66         if (b->y1 > out->y1)
  67                 out->y1 = b->y1;
  68         if (b->x2 < out->x2)
  69                 out->x2 = b->x2;
  70         if (b->y2 < out->y2)
  71                 out->y2 = b->y2;
  72         if (out->x1 >= out->x2)
  73                 return GL_FALSE;
  74         if (out->y1 >= out->y2)
  75                 return GL_FALSE;
  76         return GL_TRUE;
  77 }
  78
  79 void radeonRecalcScissorRects(radeonContextPtr radeon)
  80 {
  81         drm_clip_rect_t *out;
  82         int i;
  83
  84         /* Grow cliprect store?
  85          */
  86         if (radeon->state.scissor.numAllocedClipRects < radeon->numClipRects) {
  87                 while (radeon->state.scissor.numAllocedClipRects <
  88                        radeon->numClipRects) {
  89                         radeon->state.scissor.numAllocedClipRects += 1; /* zero case */
  90                         radeon->state.scissor.numAllocedClipRects *= 2;
  91                 }
  92
  93                 if (radeon->state.scissor.pClipRects)
  94                         FREE(radeon->state.scissor.pClipRects);
  95
  96                 radeon->state.scissor.pClipRects =
  97                     MALLOC(radeon->state.scissor.numAllocedClipRects *
  98                            sizeof(drm_clip_rect_t));
  99
 100                 if (radeon->state.scissor.pClipRects == NULL) {
 101                         radeon->state.scissor.numAllocedClipRects = 0;
 102                         return;
 103                 }
 104         }
 105
 106         out = radeon->state.scissor.pClipRects;
 107         radeon->state.scissor.numClipRects = 0;
 108
 109         for (i = 0; i < radeon->numClipRects; i++) {
 110                 if (intersect_rect(out,
 111                                    &radeon->pClipRects[i],
 112                                    &radeon->state.scissor.rect)) {
 113                         radeon->state.scissor.numClipRects++;
 114                         out++;
 115                 }
 116         }
 117 }
 118
 119 void radeonUpdateScissor(GLcontext* ctx)
 120 {
 121         radeonContextPtr radeon = RADEON_CONTEXT(ctx);
 122
 123         assert(radeon->state.scissor.enabled == ctx->Scissor.Enabled);
 124
 125         if (radeon->dri.drawable) {
 126                 __DRIdrawablePrivate *dPriv = radeon->dri.drawable;
 127                 int x1 = dPriv->x + ctx->Scissor.X;
 128                 int y1 = dPriv->y + dPriv->h - (ctx->Scissor.Y + ctx->Scissor.Height);
 129
 130                 radeon->state.scissor.rect.x1 = x1;
 131                 radeon->state.scissor.rect.y1 = y1;
 132                 radeon->state.scissor.rect.x2 = x1 + ctx->Scissor.Width - 1;
 133                 radeon->state.scissor.rect.y2 = y1 + ctx->Scissor.Height - 1;
 134
 135                 radeonRecalcScissorRects(radeon);
 136         }
 137 }
 138
 139 static void radeonScissor(GLcontext* ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 140 {
 141         radeonContextPtr radeon = RADEON_CONTEXT(ctx);
 142
 143         if (ctx->Scissor.Enabled) {
 144                 /* We don't pipeline cliprect changes */
 145                 if (IS_FAMILY_R200(radeon))
 146                         R200_FIREVERTICES((r200ContextPtr)radeon);
 147                 else
 148                         r300Flush(ctx);
 149
 150                 radeonUpdateScissor(ctx);
 151         }
 152 }
 153
 154
 155 /**
 156  * Update cliprects and scissors.
 157  */
 158 void radeonSetCliprects(radeonContextPtr radeon, GLenum mode)
 159 {
 160         __DRIdrawablePrivate *dPriv = radeon->dri.drawable;
 161
 162         switch (mode) {
 163         case GL_FRONT_LEFT:
 164                 radeon->numClipRects = dPriv->numClipRects;
 165                 radeon->pClipRects = dPriv->pClipRects;
 166                 break;
 167         case GL_BACK_LEFT:
 168                 /* Can't ignore 2d windows if we are page flipping.
 169                  */
 170                 if (dPriv->numBackClipRects == 0 || radeon->doPageFlip) {
 171                         radeon->numClipRects = dPriv->numClipRects;
 172                         radeon->pClipRects = dPriv->pClipRects;
 173                 } else {
 174                         radeon->numClipRects = dPriv->numBackClipRects;
 175                         radeon->pClipRects = dPriv->pBackClipRects;
 176                 }
 177                 break;
 178         default:
 179                 fprintf(stderr, "bad mode in radeonSetCliprects\n");
 180                 radeon->numClipRects = 0;
 181                 radeon->pClipRects = 0;
 182                 return;
 183         }
 184
 185         if (radeon->state.scissor.enabled)
 186                 radeonRecalcScissorRects(radeon);
 187 }
 188
 189
 190 /**
 191  * Handle common enable bits.
 192  * Called as a fallback by r200Enable/r300Enable.
 193  */
 194 void radeonEnable(GLcontext* ctx, GLenum cap, GLboolean state)
 195 {
 196         radeonContextPtr radeon = RADEON_CONTEXT(ctx);
 197
 198         switch(cap) {
 199         case GL_SCISSOR_TEST:
 200                 /* We don't pipeline cliprect & scissor changes */
 201                 if (IS_FAMILY_R200(radeon))
 202                         R200_FIREVERTICES((r200ContextPtr)radeon);
 203                 else
 204                         r300Flush(ctx);
 205
 206                 radeon->state.scissor.enabled = state;
 207                 radeonUpdateScissor(ctx);
 208                 break;
 209
 210         default:
 211                 return;
 212         }
 213 }
 214
 215
 216 /**
 217  * Initialize default state.
 218  * This function is called once at context init time from
 219  * r200InitState/r300InitState
 220  */
 221 void radeonInitState(radeonContextPtr radeon)
 222 {
 223         radeon->Fallback = 0;
 224
 225         if (radeon->glCtx->Visual.doubleBufferMode && radeon->sarea->pfCurrentPage == 0) {
 226                 radeon->state.color.drawOffset = radeon->radeonScreen->backOffset;
 227                 radeon->state.color.drawPitch = radeon->radeonScreen->backPitch;
 228         } else {
 229                 radeon->state.color.drawOffset = radeon->radeonScreen->frontOffset;
 230                 radeon->state.color.drawPitch = radeon->radeonScreen->frontPitch;
 231         }
 232
 233         radeon->state.pixel.readOffset = radeon->state.color.drawOffset;
 234         radeon->state.pixel.readPitch = radeon->state.color.drawPitch;
 235 }
 236
 237
 238 /**
 239  * Initialize common state functions.
 240  * Called by r200InitStateFuncs/r300InitStateFuncs
 241  */
 242 void radeonInitStateFuncs(struct dd_function_table *functions)
 243 {
 244         functions->Scissor = radeonScissor;
 245 }