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  1. /**************************************************************************
  2.  *
  3.  * Copyright 2003 VMware, Inc.
  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 VMWARE 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.  
  29. #include "main/glheader.h"
  30. #include "main/context.h"
  31. #include "main/extensions.h"
  32. #include "main/fbobject.h"
  33. #include "main/framebuffer.h"
  34. #include "main/imports.h"
  35. #include "main/points.h"
  36. #include "main/renderbuffer.h"
  37.  
  38. #include "swrast/swrast.h"
  39. #include "swrast_setup/swrast_setup.h"
  40. #include "tnl/tnl.h"
  41. #include "drivers/common/driverfuncs.h"
  42. #include "drivers/common/meta.h"
  43.  
  44. #include "intel_chipset.h"
  45. #include "intel_buffers.h"
  46. #include "intel_tex.h"
  47. #include "intel_batchbuffer.h"
  48. #include "intel_clear.h"
  49. #include "intel_extensions.h"
  50. #include "intel_pixel.h"
  51. #include "intel_regions.h"
  52. #include "intel_buffer_objects.h"
  53. #include "intel_fbo.h"
  54. #include "intel_bufmgr.h"
  55. #include "intel_screen.h"
  56. #include "intel_mipmap_tree.h"
  57.  
  58. #include "utils.h"
  59. #include "util/ralloc.h"
  60.  
  61. int INTEL_DEBUG = (0);
  62.  
  63. const char *const i915_vendor_string = "Intel Open Source Technology Center";
  64.  
  65. const char *
  66. i915_get_renderer_string(unsigned deviceID)
  67. {
  68.    const char *chipset;
  69.    static char buffer[128];
  70.  
  71.    switch (deviceID) {
  72. #undef CHIPSET
  73. #define CHIPSET(id, symbol, str) case id: chipset = str; break;
  74. #include "pci_ids/i915_pci_ids.h"
  75.    default:
  76.       chipset = "Unknown Intel Chipset";
  77.       break;
  78.    }
  79.  
  80.    (void) driGetRendererString(buffer, chipset, 0);
  81.    return buffer;
  82. }
  83.  
  84. static const GLubyte *
  85. intelGetString(struct gl_context * ctx, GLenum name)
  86. {
  87.    const struct intel_context *const intel = intel_context(ctx);
  88.  
  89.    switch (name) {
  90.    case GL_VENDOR:
  91.       return (GLubyte *) i915_vendor_string;
  92.  
  93.    case GL_RENDERER:
  94.       return
  95.          (GLubyte *) i915_get_renderer_string(intel->intelScreen->deviceID);
  96.  
  97.    default:
  98.       return NULL;
  99.    }
  100. }
  101.  
  102. #define flushFront(screen)      ((screen)->image.loader ? (screen)->image.loader->flushFrontBuffer : (screen)->dri2.loader->flushFrontBuffer)
  103.  
  104. static void
  105. intel_flush_front(struct gl_context *ctx)
  106. {
  107.    struct intel_context *intel = intel_context(ctx);
  108.     __DRIcontext *driContext = intel->driContext;
  109.     __DRIdrawable *driDrawable = driContext->driDrawablePriv;
  110.     __DRIscreen *const screen = intel->intelScreen->driScrnPriv;
  111.  
  112.     if (intel->front_buffer_dirty && _mesa_is_winsys_fbo(ctx->DrawBuffer)) {
  113.       if (flushFront(screen) &&
  114.           driDrawable &&
  115.           driDrawable->loaderPrivate) {
  116.          flushFront(screen)(driDrawable, driDrawable->loaderPrivate);
  117.  
  118.          /* We set the dirty bit in intel_prepare_render() if we're
  119.           * front buffer rendering once we get there.
  120.           */
  121.          intel->front_buffer_dirty = false;
  122.       }
  123.    }
  124. }
  125.  
  126. static void
  127. intel_update_image_buffers(struct intel_context *intel, __DRIdrawable *drawable);
  128.  
  129. static unsigned
  130. intel_bits_per_pixel(const struct intel_renderbuffer *rb)
  131. {
  132.    return _mesa_get_format_bytes(intel_rb_format(rb)) * 8;
  133. }
  134.  
  135. static void
  136. intel_query_dri2_buffers(struct intel_context *intel,
  137.                          __DRIdrawable *drawable,
  138.                          __DRIbuffer **buffers,
  139.                          int *count);
  140.  
  141. static void
  142. intel_process_dri2_buffer(struct intel_context *intel,
  143.                           __DRIdrawable *drawable,
  144.                           __DRIbuffer *buffer,
  145.                           struct intel_renderbuffer *rb,
  146.                           const char *buffer_name);
  147.  
  148. static void
  149. intel_update_dri2_buffers(struct intel_context *intel, __DRIdrawable *drawable)
  150. {
  151.    __DRIbuffer *buffers = NULL;
  152.    int i, count;
  153.    const char *region_name;
  154.    struct intel_renderbuffer *rb;
  155.    struct gl_framebuffer *fb = drawable->driverPrivate;
  156.  
  157.    intel_query_dri2_buffers(intel, drawable, &buffers, &count);
  158.  
  159.    if (buffers == NULL)
  160.       return;
  161.  
  162.    for (i = 0; i < count; i++) {
  163.       switch (buffers[i].attachment) {
  164.       case __DRI_BUFFER_FRONT_LEFT:
  165.          rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
  166.          region_name = "dri2 front buffer";
  167.          break;
  168.  
  169.       case __DRI_BUFFER_FAKE_FRONT_LEFT:
  170.          rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
  171.          region_name = "dri2 fake front buffer";
  172.          break;
  173.  
  174.       case __DRI_BUFFER_BACK_LEFT:
  175.          rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
  176.          region_name = "dri2 back buffer";
  177.          break;
  178.  
  179.       case __DRI_BUFFER_DEPTH:
  180.       case __DRI_BUFFER_HIZ:
  181.       case __DRI_BUFFER_DEPTH_STENCIL:
  182.       case __DRI_BUFFER_STENCIL:
  183.       case __DRI_BUFFER_ACCUM:
  184.       default:
  185.          fprintf(stderr,
  186.                  "unhandled buffer attach event, attachment type %d\n",
  187.                  buffers[i].attachment);
  188.          return;
  189.       }
  190.  
  191.       intel_process_dri2_buffer(intel, drawable, &buffers[i], rb, region_name);
  192.    }
  193. }
  194.  
  195. void
  196. intel_update_renderbuffers(__DRIcontext *context, __DRIdrawable *drawable)
  197. {
  198.    struct intel_context *intel = context->driverPrivate;
  199.    __DRIscreen *screen = intel->intelScreen->driScrnPriv;
  200.  
  201.    /* Set this up front, so that in case our buffers get invalidated
  202.     * while we're getting new buffers, we don't clobber the stamp and
  203.     * thus ignore the invalidate. */
  204.    drawable->lastStamp = drawable->dri2.stamp;
  205.  
  206.    if (unlikely(INTEL_DEBUG & DEBUG_DRI))
  207.       fprintf(stderr, "enter %s, drawable %p\n", __func__, drawable);
  208.  
  209.    if (screen->image.loader)
  210.       intel_update_image_buffers(intel, drawable);
  211.    else
  212.       intel_update_dri2_buffers(intel, drawable);
  213.  
  214.    driUpdateFramebufferSize(&intel->ctx, drawable);
  215. }
  216.  
  217. /**
  218.  * intel_prepare_render should be called anywhere that curent read/drawbuffer
  219.  * state is required.
  220.  */
  221. void
  222. intel_prepare_render(struct intel_context *intel)
  223. {
  224.    __DRIcontext *driContext = intel->driContext;
  225.    __DRIdrawable *drawable;
  226.  
  227.    drawable = driContext->driDrawablePriv;
  228.    if (drawable && drawable->dri2.stamp != driContext->dri2.draw_stamp) {
  229.       if (drawable->lastStamp != drawable->dri2.stamp)
  230.          intel_update_renderbuffers(driContext, drawable);
  231.       intel_draw_buffer(&intel->ctx);
  232.       driContext->dri2.draw_stamp = drawable->dri2.stamp;
  233.    }
  234.  
  235.    drawable = driContext->driReadablePriv;
  236.    if (drawable && drawable->dri2.stamp != driContext->dri2.read_stamp) {
  237.       if (drawable->lastStamp != drawable->dri2.stamp)
  238.          intel_update_renderbuffers(driContext, drawable);
  239.       driContext->dri2.read_stamp = drawable->dri2.stamp;
  240.    }
  241.  
  242.    /* If we're currently rendering to the front buffer, the rendering
  243.     * that will happen next will probably dirty the front buffer.  So
  244.     * mark it as dirty here.
  245.     */
  246.    if (intel->is_front_buffer_rendering)
  247.       intel->front_buffer_dirty = true;
  248.  
  249.    /* Wait for the swapbuffers before the one we just emitted, so we
  250.     * don't get too many swaps outstanding for apps that are GPU-heavy
  251.     * but not CPU-heavy.
  252.     *
  253.     * We're using intelDRI2Flush (called from the loader before
  254.     * swapbuffer) and glFlush (for front buffer rendering) as the
  255.     * indicator that a frame is done and then throttle when we get
  256.     * here as we prepare to render the next frame.  At this point for
  257.     * round trips for swap/copy and getting new buffers are done and
  258.     * we'll spend less time waiting on the GPU.
  259.     *
  260.     * Unfortunately, we don't have a handle to the batch containing
  261.     * the swap, and getting our hands on that doesn't seem worth it,
  262.     * so we just us the first batch we emitted after the last swap.
  263.     */
  264.    if (intel->need_throttle && intel->first_post_swapbuffers_batch) {
  265.       if (!intel->disable_throttling)
  266.          drm_intel_bo_wait_rendering(intel->first_post_swapbuffers_batch);
  267.       drm_intel_bo_unreference(intel->first_post_swapbuffers_batch);
  268.       intel->first_post_swapbuffers_batch = NULL;
  269.       intel->need_throttle = false;
  270.    }
  271. }
  272.  
  273. static void
  274. intel_noninvalidate_viewport(struct gl_context *ctx)
  275. {
  276.     struct intel_context *intel = intel_context(ctx);
  277.     __DRIcontext *driContext = intel->driContext;
  278.  
  279.     intelCalcViewport(ctx);
  280.  
  281.     if (_mesa_is_winsys_fbo(ctx->DrawBuffer)) {
  282.        dri2InvalidateDrawable(driContext->driDrawablePriv);
  283.        dri2InvalidateDrawable(driContext->driReadablePriv);
  284.     }
  285. }
  286.  
  287. static void
  288. intel_viewport(struct gl_context *ctx)
  289. {
  290.     intelCalcViewport(ctx);
  291. }
  292.  
  293. static const struct dri_debug_control debug_control[] = {
  294.    { "tex",   DEBUG_TEXTURE},
  295.    { "state", DEBUG_STATE},
  296.    { "blit",  DEBUG_BLIT},
  297.    { "mip",   DEBUG_MIPTREE},
  298.    { "fall",  DEBUG_PERF},
  299.    { "perf",  DEBUG_PERF},
  300.    { "bat",   DEBUG_BATCH},
  301.    { "pix",   DEBUG_PIXEL},
  302.    { "buf",   DEBUG_BUFMGR},
  303.    { "reg",   DEBUG_REGION},
  304.    { "fbo",   DEBUG_FBO},
  305.    { "fs",    DEBUG_WM },
  306.    { "sync",  DEBUG_SYNC},
  307.    { "dri",   DEBUG_DRI },
  308.    { "stats", DEBUG_STATS },
  309.    { "wm",    DEBUG_WM },
  310.    { "aub",   DEBUG_AUB },
  311.    { NULL,    0 }
  312. };
  313.  
  314.  
  315. static void
  316. intelInvalidateState(struct gl_context * ctx, GLuint new_state)
  317. {
  318.     struct intel_context *intel = intel_context(ctx);
  319.  
  320.     if (ctx->swrast_context)
  321.        _swrast_InvalidateState(ctx, new_state);
  322.    _vbo_InvalidateState(ctx, new_state);
  323.  
  324.    intel->NewGLState |= new_state;
  325.  
  326.    if (intel->vtbl.invalidate_state)
  327.       intel->vtbl.invalidate_state( intel, new_state );
  328. }
  329.  
  330. void
  331. intel_flush_rendering_to_batch(struct gl_context *ctx)
  332. {
  333.    struct intel_context *intel = intel_context(ctx);
  334.  
  335.    if (intel->Fallback)
  336.       _swrast_flush(ctx);
  337.  
  338.    INTEL_FIREVERTICES(intel);
  339. }
  340.  
  341. void
  342. _intel_flush(struct gl_context *ctx, const char *file, int line)
  343. {
  344.    struct intel_context *intel = intel_context(ctx);
  345.  
  346.    intel_flush_rendering_to_batch(ctx);
  347.  
  348.    if (intel->batch.used)
  349.       _intel_batchbuffer_flush(intel, file, line);
  350. }
  351.  
  352. static void
  353. intel_glFlush(struct gl_context *ctx)
  354. {
  355.    struct intel_context *intel = intel_context(ctx);
  356.  
  357.    intel_flush(ctx);
  358.    intel_flush_front(ctx);
  359.    if (intel->is_front_buffer_rendering)
  360.       intel->need_throttle = true;
  361. }
  362.  
  363. void
  364. intelFinish(struct gl_context * ctx)
  365. {
  366.    struct intel_context *intel = intel_context(ctx);
  367.  
  368.    intel_flush(ctx);
  369.    intel_flush_front(ctx);
  370.  
  371.    if (intel->batch.last_bo)
  372.       drm_intel_bo_wait_rendering(intel->batch.last_bo);
  373. }
  374.  
  375. void
  376. intelInitDriverFunctions(struct dd_function_table *functions)
  377. {
  378.    _mesa_init_driver_functions(functions);
  379.  
  380.    functions->Flush = intel_glFlush;
  381.    functions->Finish = intelFinish;
  382.    functions->GetString = intelGetString;
  383.    functions->UpdateState = intelInvalidateState;
  384.  
  385.    intelInitTextureFuncs(functions);
  386.    intelInitTextureImageFuncs(functions);
  387.    intelInitTextureSubImageFuncs(functions);
  388.    intelInitTextureCopyImageFuncs(functions);
  389.    intelInitClearFuncs(functions);
  390.    intelInitBufferFuncs(functions);
  391.    intelInitPixelFuncs(functions);
  392.    intelInitBufferObjectFuncs(functions);
  393.    intel_init_syncobj_functions(functions);
  394. }
  395.  
  396. bool
  397. intelInitContext(struct intel_context *intel,
  398.                  int api,
  399.                  unsigned major_version,
  400.                  unsigned minor_version,
  401.                  uint32_t flags,
  402.                  const struct gl_config * mesaVis,
  403.                  __DRIcontext * driContextPriv,
  404.                  void *sharedContextPrivate,
  405.                  struct dd_function_table *functions,
  406.                  unsigned *dri_ctx_error)
  407. {
  408.    struct gl_context *ctx = &intel->ctx;
  409.    struct gl_context *shareCtx = (struct gl_context *) sharedContextPrivate;
  410.    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
  411.    struct intel_screen *intelScreen = sPriv->driverPrivate;
  412.    int bo_reuse_mode;
  413.  
  414.    /* Can't rely on invalidate events, fall back to glViewport hack */
  415.    if (!driContextPriv->driScreenPriv->dri2.useInvalidate)
  416.       functions->Viewport = intel_noninvalidate_viewport;
  417.    else
  418.       functions->Viewport = intel_viewport;
  419.  
  420.    intel->intelScreen = intelScreen;
  421.  
  422.    if (!_mesa_initialize_context(&intel->ctx, api, mesaVis, shareCtx,
  423.                                  functions)) {
  424.       *dri_ctx_error = __DRI_CTX_ERROR_NO_MEMORY;
  425.       printf("%s: failed to init mesa context\n", __func__);
  426.       return false;
  427.    }
  428.  
  429.    driContextPriv->driverPrivate = intel;
  430.    intel->driContext = driContextPriv;
  431.    intel->driFd = sPriv->fd;
  432.  
  433.    intel->gen = intelScreen->gen;
  434.  
  435.    const int devID = intelScreen->deviceID;
  436.  
  437.    intel->is_945 = IS_945(devID);
  438.  
  439.    intel->has_swizzling = intel->intelScreen->hw_has_swizzling;
  440.  
  441.    memset(&ctx->TextureFormatSupported,
  442.           0, sizeof(ctx->TextureFormatSupported));
  443.  
  444.    driParseConfigFiles(&intel->optionCache, &intelScreen->optionCache,
  445.                        sPriv->myNum, "i915");
  446.    intel->maxBatchSize = 4096;
  447.  
  448.    /* Estimate the size of the mappable aperture into the GTT.  There's an
  449.     * ioctl to get the whole GTT size, but not one to get the mappable subset.
  450.     * It turns out it's basically always 256MB, though some ancient hardware
  451.     * was smaller.
  452.     */
  453.    uint32_t gtt_size = 256 * 1024 * 1024;
  454.    if (intel->gen == 2)
  455.       gtt_size = 128 * 1024 * 1024;
  456.  
  457.    /* We don't want to map two objects such that a memcpy between them would
  458.     * just fault one mapping in and then the other over and over forever.  So
  459.     * we would need to divide the GTT size by 2.  Additionally, some GTT is
  460.     * taken up by things like the framebuffer and the ringbuffer and such, so
  461.     * be more conservative.
  462.     */
  463.    intel->max_gtt_map_object_size = gtt_size / 4;
  464.  
  465.    intel->bufmgr = intelScreen->bufmgr;
  466.  
  467.    bo_reuse_mode = driQueryOptioni(&intel->optionCache, "bo_reuse");
  468.    switch (bo_reuse_mode) {
  469.    case DRI_CONF_BO_REUSE_DISABLED:
  470.       break;
  471.    case DRI_CONF_BO_REUSE_ALL:
  472.       intel_bufmgr_gem_enable_reuse(intel->bufmgr);
  473.       break;
  474.    }
  475.  
  476.    ctx->Const.MinLineWidth = 1.0;
  477.    ctx->Const.MinLineWidthAA = 1.0;
  478.    ctx->Const.MaxLineWidth = 5.0;
  479.    ctx->Const.MaxLineWidthAA = 5.0;
  480.    ctx->Const.LineWidthGranularity = 0.5;
  481.  
  482.    ctx->Const.MinPointSize = 1.0;
  483.    ctx->Const.MinPointSizeAA = 1.0;
  484.    ctx->Const.MaxPointSize = 255.0;
  485.    ctx->Const.MaxPointSizeAA = 3.0;
  486.    ctx->Const.PointSizeGranularity = 1.0;
  487.  
  488.    ctx->Const.StripTextureBorder = GL_TRUE;
  489.  
  490.    /* reinitialize the context point state.
  491.     * It depend on constants in __struct gl_contextRec::Const
  492.     */
  493.    _mesa_init_point(ctx);
  494.  
  495.    ctx->Const.MaxRenderbufferSize = 2048;
  496.  
  497.    _swrast_CreateContext(ctx);
  498.    _vbo_CreateContext(ctx);
  499.    if (ctx->swrast_context) {
  500.       _tnl_CreateContext(ctx);
  501.       _swsetup_CreateContext(ctx);
  502.  
  503.       /* Configure swrast to match hardware characteristics: */
  504.       _swrast_allow_pixel_fog(ctx, false);
  505.       _swrast_allow_vertex_fog(ctx, true);
  506.    }
  507.  
  508.    _mesa_meta_init(ctx);
  509.  
  510.    intel->hw_stipple = 1;
  511.  
  512.    intel->RenderIndex = ~0;
  513.  
  514.    intelInitExtensions(ctx);
  515.  
  516.    INTEL_DEBUG = driParseDebugString(getenv("INTEL_DEBUG"), debug_control);
  517.    if (INTEL_DEBUG & DEBUG_BUFMGR)
  518.       dri_bufmgr_set_debug(intel->bufmgr, true);
  519.    if (INTEL_DEBUG & DEBUG_PERF)
  520.       intel->perf_debug = true;
  521.  
  522.    if (INTEL_DEBUG & DEBUG_AUB)
  523.       drm_intel_bufmgr_gem_set_aub_dump(intel->bufmgr, true);
  524.  
  525.    intel_batchbuffer_init(intel);
  526.  
  527.    intel_fbo_init(intel);
  528.  
  529.    intel->use_early_z = driQueryOptionb(&intel->optionCache, "early_z");
  530.  
  531.    intel->prim.primitive = ~0;
  532.  
  533.    /* Force all software fallbacks */
  534.    if (driQueryOptionb(&intel->optionCache, "no_rast")) {
  535.       fprintf(stderr, "disabling 3D rasterization\n");
  536.       intel->no_rast = 1;
  537.    }
  538.  
  539.    if (driQueryOptionb(&intel->optionCache, "always_flush_batch")) {
  540.       fprintf(stderr, "flushing batchbuffer before/after each draw call\n");
  541.       intel->always_flush_batch = 1;
  542.    }
  543.  
  544.    if (driQueryOptionb(&intel->optionCache, "always_flush_cache")) {
  545.       fprintf(stderr, "flushing GPU caches before/after each draw call\n");
  546.       intel->always_flush_cache = 1;
  547.    }
  548.  
  549.    if (driQueryOptionb(&intel->optionCache, "disable_throttling")) {
  550.       fprintf(stderr, "disabling flush throttling\n");
  551.       intel->disable_throttling = 1;
  552.    }
  553.  
  554.    return true;
  555. }
  556.  
  557. void
  558. intelDestroyContext(__DRIcontext * driContextPriv)
  559. {
  560.    struct intel_context *intel =
  561.       (struct intel_context *) driContextPriv->driverPrivate;
  562.    struct gl_context *ctx = &intel->ctx;
  563.  
  564.    assert(intel);               /* should never be null */
  565.    if (intel) {
  566.       INTEL_FIREVERTICES(intel);
  567.  
  568.       /* Dump a final BMP in case the application doesn't call SwapBuffers */
  569.       if (INTEL_DEBUG & DEBUG_AUB) {
  570.          intel_batchbuffer_flush(intel);
  571.          aub_dump_bmp(&intel->ctx);
  572.       }
  573.  
  574.       _mesa_meta_free(&intel->ctx);
  575.  
  576.       intel->vtbl.destroy(intel);
  577.  
  578.       if (ctx->swrast_context) {
  579.          _swsetup_DestroyContext(&intel->ctx);
  580.          _tnl_DestroyContext(&intel->ctx);
  581.       }
  582.       _vbo_DestroyContext(&intel->ctx);
  583.  
  584.       if (ctx->swrast_context)
  585.          _swrast_DestroyContext(&intel->ctx);
  586.       intel->Fallback = 0x0;      /* don't call _swrast_Flush later */
  587.  
  588.       intel_batchbuffer_free(intel);
  589.  
  590.       free(intel->prim.vb);
  591.       intel->prim.vb = NULL;
  592.       drm_intel_bo_unreference(intel->prim.vb_bo);
  593.       intel->prim.vb_bo = NULL;
  594.       drm_intel_bo_unreference(intel->first_post_swapbuffers_batch);
  595.       intel->first_post_swapbuffers_batch = NULL;
  596.  
  597.       driDestroyOptionCache(&intel->optionCache);
  598.  
  599.       /* free the Mesa context */
  600.       _mesa_free_context_data(&intel->ctx);
  601.  
  602.       _math_matrix_dtr(&intel->ViewportMatrix);
  603.  
  604.       ralloc_free(intel);
  605.       driContextPriv->driverPrivate = NULL;
  606.    }
  607. }
  608.  
  609. GLboolean
  610. intelUnbindContext(__DRIcontext * driContextPriv)
  611. {
  612.    /* Unset current context and dispath table */
  613.    _mesa_make_current(NULL, NULL, NULL);
  614.  
  615.    return true;
  616. }
  617.  
  618. GLboolean
  619. intelMakeCurrent(__DRIcontext * driContextPriv,
  620.                  __DRIdrawable * driDrawPriv,
  621.                  __DRIdrawable * driReadPriv)
  622. {
  623.    struct intel_context *intel;
  624.    GET_CURRENT_CONTEXT(curCtx);
  625.  
  626.    if (driContextPriv)
  627.       intel = (struct intel_context *) driContextPriv->driverPrivate;
  628.    else
  629.       intel = NULL;
  630.  
  631.    /* According to the glXMakeCurrent() man page: "Pending commands to
  632.     * the previous context, if any, are flushed before it is released."
  633.     * But only flush if we're actually changing contexts.
  634.     */
  635.    if (intel_context(curCtx) && intel_context(curCtx) != intel) {
  636.       _mesa_flush(curCtx);
  637.    }
  638.  
  639.    if (driContextPriv) {
  640.       struct gl_context *ctx = &intel->ctx;
  641.       struct gl_framebuffer *fb, *readFb;
  642.      
  643.       if (driDrawPriv == NULL && driReadPriv == NULL) {
  644.          fb = _mesa_get_incomplete_framebuffer();
  645.          readFb = _mesa_get_incomplete_framebuffer();
  646.       } else {
  647.          fb = driDrawPriv->driverPrivate;
  648.          readFb = driReadPriv->driverPrivate;
  649.          driContextPriv->dri2.draw_stamp = driDrawPriv->dri2.stamp - 1;
  650.          driContextPriv->dri2.read_stamp = driReadPriv->dri2.stamp - 1;
  651.       }
  652.  
  653.       intel_prepare_render(intel);
  654.       _mesa_make_current(ctx, fb, readFb);
  655.  
  656.       /* We do this in intel_prepare_render() too, but intel->ctx.DrawBuffer
  657.        * is NULL at that point.  We can't call _mesa_makecurrent()
  658.        * first, since we need the buffer size for the initial
  659.        * viewport.  So just call intel_draw_buffer() again here. */
  660.       intel_draw_buffer(ctx);
  661.    }
  662.    else {
  663.       _mesa_make_current(NULL, NULL, NULL);
  664.    }
  665.  
  666.    return true;
  667. }
  668.  
  669. /**
  670.  * \brief Query DRI2 to obtain a DRIdrawable's buffers.
  671.  *
  672.  * To determine which DRI buffers to request, examine the renderbuffers
  673.  * attached to the drawable's framebuffer. Then request the buffers with
  674.  * DRI2GetBuffers() or DRI2GetBuffersWithFormat().
  675.  *
  676.  * This is called from intel_update_renderbuffers().
  677.  *
  678.  * \param drawable      Drawable whose buffers are queried.
  679.  * \param buffers       [out] List of buffers returned by DRI2 query.
  680.  * \param buffer_count  [out] Number of buffers returned.
  681.  *
  682.  * \see intel_update_renderbuffers()
  683.  * \see DRI2GetBuffers()
  684.  * \see DRI2GetBuffersWithFormat()
  685.  */
  686. static void
  687. intel_query_dri2_buffers(struct intel_context *intel,
  688.                          __DRIdrawable *drawable,
  689.                          __DRIbuffer **buffers,
  690.                          int *buffer_count)
  691. {
  692.    __DRIscreen *screen = intel->intelScreen->driScrnPriv;
  693.    struct gl_framebuffer *fb = drawable->driverPrivate;
  694.    int i = 0;
  695.    unsigned attachments[8];
  696.  
  697.    struct intel_renderbuffer *front_rb;
  698.    struct intel_renderbuffer *back_rb;
  699.  
  700.    front_rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
  701.    back_rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
  702.  
  703.    memset(attachments, 0, sizeof(attachments));
  704.    if ((intel->is_front_buffer_rendering ||
  705.         intel->is_front_buffer_reading ||
  706.         !back_rb) && front_rb) {
  707.       /* If a fake front buffer is in use, then querying for
  708.        * __DRI_BUFFER_FRONT_LEFT will cause the server to copy the image from
  709.        * the real front buffer to the fake front buffer.  So before doing the
  710.        * query, we need to make sure all the pending drawing has landed in the
  711.        * real front buffer.
  712.        */
  713.       intel_flush(&intel->ctx);
  714.       intel_flush_front(&intel->ctx);
  715.  
  716.       attachments[i++] = __DRI_BUFFER_FRONT_LEFT;
  717.       attachments[i++] = intel_bits_per_pixel(front_rb);
  718.    } else if (front_rb && intel->front_buffer_dirty) {
  719.       /* We have pending front buffer rendering, but we aren't querying for a
  720.        * front buffer.  If the front buffer we have is a fake front buffer,
  721.        * the X server is going to throw it away when it processes the query.
  722.        * So before doing the query, make sure all the pending drawing has
  723.        * landed in the real front buffer.
  724.        */
  725.       intel_flush(&intel->ctx);
  726.       intel_flush_front(&intel->ctx);
  727.    }
  728.  
  729.    if (back_rb) {
  730.       attachments[i++] = __DRI_BUFFER_BACK_LEFT;
  731.       attachments[i++] = intel_bits_per_pixel(back_rb);
  732.    }
  733.  
  734.    assert(i <= ARRAY_SIZE(attachments));
  735.  
  736.    *buffers = screen->dri2.loader->getBuffersWithFormat(drawable,
  737.                                                         &drawable->w,
  738.                                                         &drawable->h,
  739.                                                         attachments, i / 2,
  740.                                                         buffer_count,
  741.                                                         drawable->loaderPrivate);
  742. }
  743.  
  744. /**
  745.  * \brief Assign a DRI buffer's DRM region to a renderbuffer.
  746.  *
  747.  * This is called from intel_update_renderbuffers().
  748.  *
  749.  * \par Note:
  750.  *    DRI buffers whose attachment point is DRI2BufferStencil or
  751.  *    DRI2BufferDepthStencil are handled as special cases.
  752.  *
  753.  * \param buffer_name is a human readable name, such as "dri2 front buffer",
  754.  *        that is passed to intel_region_alloc_for_handle().
  755.  *
  756.  * \see intel_update_renderbuffers()
  757.  * \see intel_region_alloc_for_handle()
  758.  */
  759. static void
  760. intel_process_dri2_buffer(struct intel_context *intel,
  761.                           __DRIdrawable *drawable,
  762.                           __DRIbuffer *buffer,
  763.                           struct intel_renderbuffer *rb,
  764.                           const char *buffer_name)
  765. {
  766.    struct intel_region *region = NULL;
  767.  
  768.    if (!rb)
  769.       return;
  770.  
  771.    /* We try to avoid closing and reopening the same BO name, because the first
  772.     * use of a mapping of the buffer involves a bunch of page faulting which is
  773.     * moderately expensive.
  774.     */
  775.    if (rb->mt &&
  776.        rb->mt->region &&
  777.        rb->mt->region->name == buffer->name)
  778.       return;
  779.  
  780.    if (unlikely(INTEL_DEBUG & DEBUG_DRI)) {
  781.       fprintf(stderr,
  782.               "attaching buffer %d, at %d, cpp %d, pitch %d\n",
  783.               buffer->name, buffer->attachment,
  784.               buffer->cpp, buffer->pitch);
  785.    }
  786.  
  787.    intel_miptree_release(&rb->mt);
  788.    region = intel_region_alloc_for_handle(intel->intelScreen,
  789.                                           buffer->cpp,
  790.                                           drawable->w,
  791.                                           drawable->h,
  792.                                           buffer->pitch,
  793.                                           buffer->name,
  794.                                           buffer_name);
  795.    if (!region)
  796.       return;
  797.  
  798.    rb->mt = intel_miptree_create_for_dri2_buffer(intel,
  799.                                                  buffer->attachment,
  800.                                                  intel_rb_format(rb),
  801.                                                  region);
  802.    intel_region_release(&region);
  803. }
  804.  
  805. /**
  806.  * \brief Query DRI Image loader to obtain a DRIdrawable's buffers.
  807.  *
  808.  * To determine which DRI buffers to request, examine the renderbuffers
  809.  * attached to the drawable's framebuffer. Then request the buffers with
  810.  * dri3
  811.  *
  812.  * This is called from intel_update_renderbuffers().
  813.  *
  814.  * \param drawable      Drawable whose buffers are queried.
  815.  * \param buffers       [out] List of buffers returned by DRI2 query.
  816.  * \param buffer_count  [out] Number of buffers returned.
  817.  *
  818.  * \see intel_update_renderbuffers()
  819.  */
  820.  
  821. static void
  822. intel_update_image_buffer(struct intel_context *intel,
  823.                           __DRIdrawable *drawable,
  824.                           struct intel_renderbuffer *rb,
  825.                           __DRIimage *buffer,
  826.                           enum __DRIimageBufferMask buffer_type)
  827. {
  828.    struct intel_region *region = buffer->region;
  829.  
  830.    if (!rb || !region)
  831.       return;
  832.  
  833.    unsigned num_samples = rb->Base.Base.NumSamples;
  834.  
  835.    if (rb->mt &&
  836.        rb->mt->region &&
  837.        rb->mt->region == region)
  838.       return;
  839.  
  840.    intel_miptree_release(&rb->mt);
  841.    rb->mt = intel_miptree_create_for_image_buffer(intel,
  842.                                                   buffer_type,
  843.                                                   intel_rb_format(rb),
  844.                                                   num_samples,
  845.                                                   region);
  846. }
  847.  
  848.  
  849. static void
  850. intel_update_image_buffers(struct intel_context *intel, __DRIdrawable *drawable)
  851. {
  852.    struct gl_framebuffer *fb = drawable->driverPrivate;
  853.    __DRIscreen *screen = intel->intelScreen->driScrnPriv;
  854.    struct intel_renderbuffer *front_rb;
  855.    struct intel_renderbuffer *back_rb;
  856.    struct __DRIimageList images;
  857.    unsigned int format;
  858.    uint32_t buffer_mask = 0;
  859.  
  860.    front_rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
  861.    back_rb = intel_get_renderbuffer(fb, BUFFER_BACK_LEFT);
  862.  
  863.    if (back_rb)
  864.       format = intel_rb_format(back_rb);
  865.    else if (front_rb)
  866.       format = intel_rb_format(front_rb);
  867.    else
  868.       return;
  869.  
  870.    if ((intel->is_front_buffer_rendering || intel->is_front_buffer_reading || !back_rb) && front_rb)
  871.       buffer_mask |= __DRI_IMAGE_BUFFER_FRONT;
  872.  
  873.    if (back_rb)
  874.       buffer_mask |= __DRI_IMAGE_BUFFER_BACK;
  875.  
  876.    (*screen->image.loader->getBuffers) (drawable,
  877.                                         driGLFormatToImageFormat(format),
  878.                                         &drawable->dri2.stamp,
  879.                                         drawable->loaderPrivate,
  880.                                         buffer_mask,
  881.                                         &images);
  882.  
  883.    if (images.image_mask & __DRI_IMAGE_BUFFER_FRONT) {
  884.       drawable->w = images.front->width;
  885.       drawable->h = images.front->height;
  886.       intel_update_image_buffer(intel,
  887.                                 drawable,
  888.                                 front_rb,
  889.                                 images.front,
  890.                                 __DRI_IMAGE_BUFFER_FRONT);
  891.    }
  892.    if (images.image_mask & __DRI_IMAGE_BUFFER_BACK) {
  893.       drawable->w = images.back->width;
  894.       drawable->h = images.back->height;
  895.       intel_update_image_buffer(intel,
  896.                                 drawable,
  897.                                 back_rb,
  898.                                 images.back,
  899.                                 __DRI_IMAGE_BUFFER_BACK);
  900.    }
  901. }
  902.