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 "main/glheader.h"
  37 #include "main/imports.h"
  38 #include "main/api_arrayelt.h"
  39 #include "main/enums.h"
  40 #include "main/framebuffer.h"
  41 #include "main/colormac.h"
  42 #include "main/light.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 "radeon_ioctl.h"
  51 #include "radeon_state.h"
  52 #include "r300_ioctl.h"
  53
  54
  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 void radeonUpdateScissor(GLcontext* ctx)
 119 {
 120         radeonContextPtr radeon = RADEON_CONTEXT(ctx);
 121
 122         if (radeon->dri.drawable) {
 123                 __DRIdrawablePrivate *dPriv = radeon->dri.drawable;
 124                 int x1 = dPriv->x + ctx->Scissor.X;
 125                 int y1 = dPriv->y + dPriv->h - (ctx->Scissor.Y + ctx->Scissor.Height);
 126
 127                 radeon->state.scissor.rect.x1 = x1;
 128                 radeon->state.scissor.rect.y1 = y1;
 129                 radeon->state.scissor.rect.x2 = x1 + ctx->Scissor.Width;
 130                 radeon->state.scissor.rect.y2 = y1 + ctx->Scissor.Height;
 131
 132                 radeonRecalcScissorRects(radeon);
 133         }
 134 }
 135
 136 static void radeonScissor(GLcontext* ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 137 {
 138         if (ctx->Scissor.Enabled) {
 139                 /* We don't pipeline cliprect changes */
 140                 r300Flush(ctx);
 141                 radeonUpdateScissor(ctx);
 142         }
 143 }
 144
 145
 146 /**
 147  * Update cliprects and scissors.
 148  */
 149 void radeonSetCliprects(radeonContextPtr radeon)
 150 {
 151         __DRIdrawablePrivate *const drawable = radeon->dri.drawable;
 152         __DRIdrawablePrivate *const readable = radeon->dri.readable;
 153         GLframebuffer *const draw_fb = (GLframebuffer*)drawable->driverPrivate;
 154         GLframebuffer *const read_fb = (GLframebuffer*)readable->driverPrivate;
 155
 156         if (draw_fb->_ColorDrawBufferIndexes[0] == BUFFER_BACK_LEFT) {
 157                 /* Can't ignore 2d windows if we are page flipping. */
 158                 if (drawable->numBackClipRects == 0 || radeon->doPageFlip ||
 159                     radeon->sarea->pfCurrentPage == 1) {
 160                         radeon->numClipRects = drawable->numClipRects;
 161                         radeon->pClipRects = drawable->pClipRects;
 162                 } else {
 163                         radeon->numClipRects = drawable->numBackClipRects;
 164                         radeon->pClipRects = drawable->pBackClipRects;
 165                 }
 166         } else {
 167                 /* front buffer (or none, or multiple buffers */
 168                 radeon->numClipRects = drawable->numClipRects;
 169                 radeon->pClipRects = drawable->pClipRects;
 170         }
 171
 172         if ((draw_fb->Width != drawable->w) ||
 173             (draw_fb->Height != drawable->h)) {
 174                 _mesa_resize_framebuffer(radeon->glCtx, draw_fb,
 175                                          drawable->w, drawable->h);
 176                 draw_fb->Initialized = GL_TRUE;
 177         }
 178
 179         if (drawable != readable) {
 180                 if ((read_fb->Width != readable->w) ||
 181                     (read_fb->Height != readable->h)) {
 182                         _mesa_resize_framebuffer(radeon->glCtx, read_fb,
 183                                                  readable->w, readable->h);
 184                         read_fb->Initialized = GL_TRUE;
 185                 }
 186         }
 187
 188         if (radeon->state.scissor.enabled)
 189                 radeonRecalcScissorRects(radeon);
 190
 191         radeon->lastStamp = drawable->lastStamp;
 192 }
 193
 194
 195 /**
 196  * Handle common enable bits.
 197  * Called as a fallback by r200Enable/r300Enable.
 198  */
 199 void radeonEnable(GLcontext* ctx, GLenum cap, GLboolean state)
 200 {
 201         radeonContextPtr radeon = RADEON_CONTEXT(ctx);
 202
 203         switch(cap) {
 204         case GL_SCISSOR_TEST:
 205                 /* We don't pipeline cliprect & scissor changes */
 206                 r300Flush(ctx);
 207
 208                 radeon->state.scissor.enabled = state;
 209                 radeonUpdateScissor(ctx);
 210                 break;
 211
 212         default:
 213                 return;
 214         }
 215 }
 216
 217
 218 /**
 219  * Initialize default state.
 220  * This function is called once at context init time from
 221  * r200InitState/r300InitState
 222  */
 223 void radeonInitState(radeonContextPtr radeon)
 224 {
 225         radeon->Fallback = 0;
 226
 227         if (radeon->glCtx->Visual.doubleBufferMode && radeon->sarea->pfCurrentPage == 0) {
 228                 radeon->state.color.drawOffset = radeon->radeonScreen->backOffset;
 229                 radeon->state.color.drawPitch = radeon->radeonScreen->backPitch;
 230         } else {
 231                 radeon->state.color.drawOffset = radeon->radeonScreen->frontOffset;
 232                 radeon->state.color.drawPitch = radeon->radeonScreen->frontPitch;
 233         }
 234 }
 235
 236
 237 /**
 238  * Initialize common state functions.
 239  * Called by r200InitStateFuncs/r300InitStateFuncs
 240  */
 241 void radeonInitStateFuncs(struct dd_function_table *functions)
 242 {
 243         functions->Scissor = radeonScissor;
 244 }