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 "vbo/vbo.h"
  45 #include "tnl/tnl.h"
  46 #include "tnl/t_pipeline.h"
  47 #include "swrast_setup/swrast_setup.h"
  48
  49 #include "radeon_ioctl.h"
  50 #include "radeon_state.h"
  51 #include "r300_ioctl.h"
  52 #include "framebuffer.h"
  53
  54 /* =============================================================
  55  * Scissoring
  56  */
  57
  58 static GLboolean intersect_rect(drm_clip_rect_t * out,
  59                                 drm_clip_rect_t * a, drm_clip_rect_t * b)
  60 {
  61         *out = *a;
  62         if (b->x1 > out->x1)
  63                 out->x1 = b->x1;
  64         if (b->y1 > out->y1)
  65                 out->y1 = b->y1;
  66         if (b->x2 < out->x2)
  67                 out->x2 = b->x2;
  68         if (b->y2 < out->y2)
  69                 out->y2 = b->y2;
  70         if (out->x1 >= out->x2)
  71                 return GL_FALSE;
  72         if (out->y1 >= out->y2)
  73                 return GL_FALSE;
  74         return GL_TRUE;
  75 }
  76
  77 void radeonRecalcScissorRects(radeonContextPtr radeon)
  78 {
  79         drm_clip_rect_t *out;
  80         int i;
  81
  82         /* Grow cliprect store?
  83          */
  84         if (radeon->state.scissor.numAllocedClipRects < radeon->numClipRects) {
  85                 while (radeon->state.scissor.numAllocedClipRects <
  86                        radeon->numClipRects) {
  87                         radeon->state.scissor.numAllocedClipRects += 1; /* zero case */
  88                         radeon->state.scissor.numAllocedClipRects *= 2;
  89                 }
  90
  91                 if (radeon->state.scissor.pClipRects)
  92                         FREE(radeon->state.scissor.pClipRects);
  93
  94                 radeon->state.scissor.pClipRects =
  95                     MALLOC(radeon->state.scissor.numAllocedClipRects *
  96                            sizeof(drm_clip_rect_t));
  97
  98                 if (radeon->state.scissor.pClipRects == NULL) {
  99                         radeon->state.scissor.numAllocedClipRects = 0;
 100                         return;
 101                 }
 102         }
 103
 104         out = radeon->state.scissor.pClipRects;
 105         radeon->state.scissor.numClipRects = 0;
 106
 107         for (i = 0; i < radeon->numClipRects; i++) {
 108                 if (intersect_rect(out,
 109                                    &radeon->pClipRects[i],
 110                                    &radeon->state.scissor.rect)) {
 111                         radeon->state.scissor.numClipRects++;
 112                         out++;
 113                 }
 114         }
 115 }
 116
 117 void radeonUpdateScissor(GLcontext* ctx)
 118 {
 119         radeonContextPtr radeon = RADEON_CONTEXT(ctx);
 120
 121         if (radeon->dri.drawable) {
 122                 __DRIdrawablePrivate *dPriv = radeon->dri.drawable;
 123                 int x1 = dPriv->x + ctx->Scissor.X;
 124                 int y1 = dPriv->y + dPriv->h - (ctx->Scissor.Y + ctx->Scissor.Height);
 125
 126                 radeon->state.scissor.rect.x1 = x1;
 127                 radeon->state.scissor.rect.y1 = y1;
 128                 radeon->state.scissor.rect.x2 = x1 + ctx->Scissor.Width - 1;
 129                 radeon->state.scissor.rect.y2 = y1 + ctx->Scissor.Height - 1;
 130
 131                 radeonRecalcScissorRects(radeon);
 132         }
 133 }
 134
 135 static void radeonScissor(GLcontext* ctx, GLint x, GLint y, GLsizei w, GLsizei h)
 136 {
 137         if (ctx->Scissor.Enabled) {
 138                 /* We don't pipeline cliprect changes */
 139                 r300Flush(ctx);
 140                 radeonUpdateScissor(ctx);
 141         }
 142 }
 143
 144
 145 /**
 146  * Update cliprects and scissors.
 147  */
 148 void radeonSetCliprects(radeonContextPtr radeon)
 149 {
 150         __DRIdrawablePrivate *const drawable = radeon->dri.drawable;
 151         __DRIdrawablePrivate *const readable = radeon->dri.readable;
 152         GLframebuffer *const draw_fb = (GLframebuffer*)drawable->driverPrivate;
 153         GLframebuffer *const read_fb = (GLframebuffer*)readable->driverPrivate;
 154
 155         if (draw_fb->_ColorDrawBufferIndexes[0] == BUFFER_BACK_LEFT) {
 156                 /* Can't ignore 2d windows if we are page flipping. */
 157                 if (drawable->numBackClipRects == 0 || radeon->doPageFlip ||
 158                     radeon->sarea->pfCurrentPage == 1) {
 159                         radeon->numClipRects = drawable->numClipRects;
 160                         radeon->pClipRects = drawable->pClipRects;
 161                 } else {
 162                         radeon->numClipRects = drawable->numBackClipRects;
 163                         radeon->pClipRects = drawable->pBackClipRects;
 164                 }
 165         } else {
 166                 /* front buffer (or none, or multiple buffers */
 167                 radeon->numClipRects = drawable->numClipRects;
 168                 radeon->pClipRects = drawable->pClipRects;
 169         }
 170
 171         if ((draw_fb->Width != drawable->w) ||
 172             (draw_fb->Height != drawable->h)) {
 173                 _mesa_resize_framebuffer(radeon->glCtx, draw_fb,
 174                                          drawable->w, drawable->h);
 175                 draw_fb->Initialized = GL_TRUE;
 176         }
 177
 178         if (drawable != readable) {
 179                 if ((read_fb->Width != readable->w) ||
 180                     (read_fb->Height != readable->h)) {
 181                         _mesa_resize_framebuffer(radeon->glCtx, read_fb,
 182                                                  readable->w, readable->h);
 183                         read_fb->Initialized = GL_TRUE;
 184                 }
 185         }
 186
 187         if (radeon->state.scissor.enabled)
 188                 radeonRecalcScissorRects(radeon);
 189
 190         radeon->lastStamp = drawable->lastStamp;
 191 }
 192
 193
 194 /**
 195  * Handle common enable bits.
 196  * Called as a fallback by r200Enable/r300Enable.
 197  */
 198 void radeonEnable(GLcontext* ctx, GLenum cap, GLboolean state)
 199 {
 200         radeonContextPtr radeon = RADEON_CONTEXT(ctx);
 201
 202         switch(cap) {
 203         case GL_SCISSOR_TEST:
 204                 /* We don't pipeline cliprect & scissor changes */
 205                 r300Flush(ctx);
 206
 207                 radeon->state.scissor.enabled = state;
 208                 radeonUpdateScissor(ctx);
 209                 break;
 210
 211         default:
 212                 return;
 213         }
 214 }
 215
 216
 217 /**
 218  * Initialize default state.
 219  * This function is called once at context init time from
 220  * r200InitState/r300InitState
 221  */
 222 void radeonInitState(radeonContextPtr radeon)
 223 {
 224         radeon->Fallback = 0;
 225
 226         if (radeon->glCtx->Visual.doubleBufferMode && radeon->sarea->pfCurrentPage == 0) {
 227                 radeon->state.color.drawOffset = radeon->radeonScreen->backOffset;
 228                 radeon->state.color.drawPitch = radeon->radeonScreen->backPitch;
 229         } else {
 230                 radeon->state.color.drawOffset = radeon->radeonScreen->frontOffset;
 231                 radeon->state.color.drawPitch = radeon->radeonScreen->frontPitch;
 232         }
 233 }
 234
 235
 236 /**
 237  * Initialize common state functions.
 238  * Called by r200InitStateFuncs/r300InitStateFuncs
 239  */
 240 void radeonInitStateFuncs(struct dd_function_table *functions)
 241 {
 242         functions->Scissor = radeonScissor;
 243 }