src/mesa/drivers/dri/intel_winsys/intel_swapbuffers.c

   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 "intel_screen.h"
  29 #include "intel_context.h"
  30 #include "intel_swapbuffers.h"
  31 #include "intel_batchbuffer.h"
  32 #include "intel_reg.h"
  33 #include "intel_winsys.h"
  34
  35 #include "pipe/p_context.h"
  36 #include "state_tracker/st_public.h"
  37 #include "state_tracker/st_context.h"
  38 #include "state_tracker/st_cb_fbo.h"
  39
  40
  41 /**
  42  * Display a colorbuffer surface in an X window.
  43  * Used for SwapBuffers and flushing front buffer rendering.
  44  *
  45  * \param dPriv  the window/drawable to display into
  46  * \param surf  the surface to display
  47  * \param rect  optional subrect of surface to display (may be NULL).
  48  */
  49 void
  50 intelDisplaySurface(__DRIdrawablePrivate *dPriv,
  51                     struct pipe_surface *surf,
  52                     const drm_clip_rect_t *rect)
  53 {
  54    struct intel_screen *intelScreen = intel_screen(dPriv->driScreenPriv);
  55    struct intel_context *intel = intelScreen->dummyContext;
  56
  57    DBG(SWAP, "%s\n", __FUNCTION__);
  58
  59    if (!intel) {
  60       /* XXX this is where some kind of extra/meta context could be useful */
  61       return;
  62    }
  63
  64    if (intel->last_swap_fence) {
  65       driFenceFinish(intel->last_swap_fence, DRM_FENCE_TYPE_EXE, TRUE);
  66       driFenceUnReference(intel->last_swap_fence);
  67       intel->last_swap_fence = NULL;
  68    }
  69    intel->last_swap_fence = intel->first_swap_fence;
  70    intel->first_swap_fence = NULL;
  71
  72    /* The LOCK_HARDWARE is required for the cliprects.  Buffer offsets
  73     * should work regardless.
  74     */
  75    LOCK_HARDWARE(intel);
  76    /* if this drawable isn't currently bound the LOCK_HARDWARE done on the
  77     * current context (which is what intelScreenContext should return) might
  78     * not get a contended lock and thus cliprects not updated (tests/manywin)
  79     */
  80    if (intel_context(dPriv->driContextPriv) != intel)
  81       DRI_VALIDATE_DRAWABLE_INFO(intel->driScreen, dPriv);
  82
  83
  84    if (dPriv && dPriv->numClipRects) {
  85       const int srcWidth = surf->width;
  86       const int srcHeight = surf->height;
  87       const int nbox = dPriv->numClipRects;
  88       const drm_clip_rect_t *pbox = dPriv->pClipRects;
  89       const int pitch = intelScreen->front.pitch / intelScreen->front.cpp;
  90       const int cpp = intelScreen->front.cpp;
  91       const int srcpitch = surf->pitch;
  92       int BR13, CMD;
  93       int i;
  94
  95       ASSERT(surf->buffer);
  96       ASSERT(surf->cpp == cpp);
  97
  98       DBG(SWAP, "screen pitch %d  src surface pitch %d\n",
  99           pitch, surf->pitch);
 100
 101       if (cpp == 2) {
 102          BR13 = (pitch * cpp) | (0xCC << 16) | (1 << 24);
 103          CMD = XY_SRC_COPY_BLT_CMD;
 104       }
 105       else {
 106          BR13 = (pitch * cpp) | (0xCC << 16) | (1 << 24) | (1 << 25);
 107          CMD = (XY_SRC_COPY_BLT_CMD | XY_SRC_COPY_BLT_WRITE_ALPHA |
 108                 XY_SRC_COPY_BLT_WRITE_RGB);
 109       }
 110
 111       for (i = 0; i < nbox; i++, pbox++) {
 112          drm_clip_rect_t box;
 113          drm_clip_rect_t sbox;
 114
 115          if (pbox->x1 > pbox->x2 ||
 116              pbox->y1 > pbox->y2 ||
 117              pbox->x2 > intelScreen->front.width ||
 118              pbox->y2 > intelScreen->front.height) {
 119             /* invalid cliprect, skip it */
 120             continue;
 121          }
 122
 123          box = *pbox;
 124
 125          if (rect) {
 126             /* intersect cliprect with user-provided src rect */
 127             drm_clip_rect_t rrect;
 128
 129             rrect.x1 = dPriv->x + rect->x1;
 130             rrect.y1 = (dPriv->h - rect->y1 - rect->y2) + dPriv->y;
 131             rrect.x2 = rect->x2 + rrect.x1;
 132             rrect.y2 = rect->y2 + rrect.y1;
 133             if (rrect.x1 > box.x1)
 134                box.x1 = rrect.x1;
 135             if (rrect.y1 > box.y1)
 136                box.y1 = rrect.y1;
 137             if (rrect.x2 < box.x2)
 138                box.x2 = rrect.x2;
 139             if (rrect.y2 < box.y2)
 140                box.y2 = rrect.y2;
 141
 142             if (box.x1 > box.x2 || box.y1 > box.y2)
 143                continue;
 144          }
 145
 146          /* restrict blit to size of actually rendered area */
 147          if (box.x2 - box.x1 > srcWidth)
 148             box.x2 = srcWidth + box.x1;
 149          if (box.y2 - box.y1 > srcHeight)
 150             box.y2 = srcHeight + box.y1;
 151
 152          DBG(SWAP, "box x1 x2 y1 y2 %d %d %d %d\n",
 153              box.x1, box.x2, box.y1, box.y2);
 154
 155          sbox.x1 = box.x1 - dPriv->x;
 156          sbox.y1 = box.y1 - dPriv->y;
 157
 158          assert(box.x1 < box.x2);
 159          assert(box.y1 < box.y2);
 160
 161          /* XXX this could be done with pipe->surface_copy() */
 162          BEGIN_BATCH(8, INTEL_BATCH_NO_CLIPRECTS);
 163          OUT_BATCH(CMD);
 164          OUT_BATCH(BR13);
 165          OUT_BATCH((box.y1 << 16) | box.x1);
 166          OUT_BATCH((box.y2 << 16) | box.x2);
 167
 168          OUT_RELOC(intelScreen->front.buffer,
 169                    DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_WRITE,
 170                    DRM_BO_MASK_MEM | DRM_BO_FLAG_WRITE, 0);
 171          OUT_BATCH((sbox.y1 << 16) | sbox.x1);
 172          OUT_BATCH((srcpitch * cpp) & 0xffff);
 173          OUT_RELOC(dri_bo(surf->buffer),
 174                    DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_READ,
 175                    DRM_BO_MASK_MEM | DRM_BO_FLAG_READ, 0);
 176
 177          ADVANCE_BATCH();
 178       }
 179
 180       if (intel->first_swap_fence)
 181          driFenceUnReference(intel->first_swap_fence);
 182       intel->first_swap_fence = intel_batchbuffer_flush(intel->batch);
 183       driFenceReference(intel->first_swap_fence);
 184    }
 185
 186    UNLOCK_HARDWARE(intel);
 187
 188    if (intel->lastStamp != dPriv->lastStamp) {
 189       intelUpdateWindowSize(dPriv);
 190       intel->lastStamp = dPriv->lastStamp;
 191    }
 192 }
 193
 194
 195
 196 /**
 197  * This will be called whenever the currently bound window is moved/resized.
 198  */
 199 void
 200 intelUpdateWindowSize(__DRIdrawablePrivate *dPriv)
 201 {
 202    struct intel_framebuffer *intelfb = intel_framebuffer(dPriv);
 203    assert(intelfb->stfb);
 204    st_resize_framebuffer(intelfb->stfb, dPriv->w, dPriv->h);
 205 }
 206
 207
 208
 209 void
 210 intelSwapBuffers(__DRIdrawablePrivate * dPriv)
 211 {
 212    struct intel_framebuffer *intel_fb = intel_framebuffer(dPriv);
 213    struct pipe_surface *back_surf;
 214
 215    assert(intel_fb);
 216    assert(intel_fb->stfb);
 217
 218    back_surf = st_get_framebuffer_surface(intel_fb->stfb,
 219                                           ST_SURFACE_BACK_LEFT);
 220    if (back_surf) {
 221       st_notify_swapbuffers(intel_fb->stfb);
 222       intelDisplaySurface(dPriv, back_surf, NULL);
 223    }
 224 }
 225
 226
 227 /**
 228  * Called via glXCopySubBufferMESA() to copy a subrect of the back
 229  * buffer to the front buffer/screen.
 230  */
 231 void
 232 intelCopySubBuffer(__DRIdrawablePrivate * dPriv, int x, int y, int w, int h)
 233 {
 234    struct intel_framebuffer *intel_fb = intel_framebuffer(dPriv);
 235    struct pipe_surface *back_surf;
 236
 237    assert(intel_fb);
 238    assert(intel_fb->stfb);
 239
 240    back_surf = st_get_framebuffer_surface(intel_fb->stfb,
 241                                           ST_SURFACE_BACK_LEFT);
 242    if (back_surf) {
 243       drm_clip_rect_t rect;
 244       rect.x1 = x;
 245       rect.y1 = y;
 246       rect.x2 = w;
 247       rect.y2 = h;
 248
 249       st_notify_swapbuffers(intel_fb->stfb);
 250       intelDisplaySurface(dPriv, back_surf, &rect);
 251    }
 252 }