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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. #include <errno.h>
  29. #include <time.h>
  30. #include <unistd.h>
  31. #include "main/glheader.h"
  32. #include "main/context.h"
  33. #include "main/framebuffer.h"
  34. #include "main/renderbuffer.h"
  35. #include "main/texobj.h"
  36. #include "main/hash.h"
  37. #include "main/fbobject.h"
  38. #include "main/version.h"
  39. #include "swrast/s_renderbuffer.h"
  40.  
  41. #include "utils.h"
  42. #include "xmlpool.h"
  43.  
  44. static const __DRIconfigOptionsExtension i915_config_options = {
  45.    .base = { __DRI_CONFIG_OPTIONS, 1 },
  46.    .xml =
  47.  
  48. DRI_CONF_BEGIN
  49.    DRI_CONF_SECTION_PERFORMANCE
  50.       DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_ALWAYS_SYNC)
  51.       /* Options correspond to DRI_CONF_BO_REUSE_DISABLED,
  52.        * DRI_CONF_BO_REUSE_ALL
  53.        */
  54.       DRI_CONF_OPT_BEGIN_V(bo_reuse, enum, 1, "0:1")
  55.          DRI_CONF_DESC_BEGIN(en, "Buffer object reuse")
  56.             DRI_CONF_ENUM(0, "Disable buffer object reuse")
  57.             DRI_CONF_ENUM(1, "Enable reuse of all sizes of buffer objects")
  58.          DRI_CONF_DESC_END
  59.       DRI_CONF_OPT_END
  60.  
  61.       DRI_CONF_OPT_BEGIN_B(early_z, "false")
  62.          DRI_CONF_DESC(en, "Enable early Z in classic mode (unstable, 945-only).")
  63.       DRI_CONF_OPT_END
  64.  
  65.    DRI_CONF_SECTION_END
  66.    DRI_CONF_SECTION_QUALITY
  67.       DRI_CONF_FORCE_S3TC_ENABLE("false")
  68.    DRI_CONF_SECTION_END
  69.    DRI_CONF_SECTION_DEBUG
  70.       DRI_CONF_NO_RAST("false")
  71.       DRI_CONF_ALWAYS_FLUSH_BATCH("false")
  72.       DRI_CONF_ALWAYS_FLUSH_CACHE("false")
  73.       DRI_CONF_DISABLE_THROTTLING("false")
  74.       DRI_CONF_FORCE_GLSL_EXTENSIONS_WARN("false")
  75.       DRI_CONF_DISABLE_GLSL_LINE_CONTINUATIONS("false")
  76.       DRI_CONF_DISABLE_BLEND_FUNC_EXTENDED("false")
  77.  
  78.       DRI_CONF_OPT_BEGIN_B(shader_precompile, "true")
  79.          DRI_CONF_DESC(en, "Perform code generation at shader link time.")
  80.       DRI_CONF_OPT_END
  81.    DRI_CONF_SECTION_END
  82. DRI_CONF_END
  83. };
  84.  
  85. #include "intel_batchbuffer.h"
  86. #include "intel_buffers.h"
  87. #include "intel_bufmgr.h"
  88. #include "intel_chipset.h"
  89. #include "intel_fbo.h"
  90. #include "intel_mipmap_tree.h"
  91. #include "intel_screen.h"
  92. #include "intel_tex.h"
  93. #include "intel_regions.h"
  94.  
  95. #include "i915_drm.h"
  96.  
  97. /**
  98.  * For debugging purposes, this returns a time in seconds.
  99.  */
  100. double
  101. get_time(void)
  102. {
  103.    struct timespec tp;
  104.  
  105.    clock_gettime(CLOCK_MONOTONIC, &tp);
  106.  
  107.    return tp.tv_sec + tp.tv_nsec / 1000000000.0;
  108. }
  109.  
  110. void
  111. aub_dump_bmp(struct gl_context *ctx)
  112. {
  113.    struct gl_framebuffer *fb = ctx->DrawBuffer;
  114.  
  115.    for (int i = 0; i < fb->_NumColorDrawBuffers; i++) {
  116.       struct intel_renderbuffer *irb =
  117.          intel_renderbuffer(fb->_ColorDrawBuffers[i]);
  118.  
  119.       if (irb && irb->mt) {
  120.          enum aub_dump_bmp_format format;
  121.  
  122.          switch (irb->Base.Base.Format) {
  123.          case MESA_FORMAT_B8G8R8A8_UNORM:
  124.          case MESA_FORMAT_B8G8R8X8_UNORM:
  125.             format = AUB_DUMP_BMP_FORMAT_ARGB_8888;
  126.             break;
  127.          default:
  128.             continue;
  129.          }
  130.  
  131.          assert(irb->mt->region->pitch % irb->mt->region->cpp == 0);
  132.          drm_intel_gem_bo_aub_dump_bmp(irb->mt->region->bo,
  133.                                        irb->draw_x,
  134.                                        irb->draw_y,
  135.                                        irb->Base.Base.Width,
  136.                                        irb->Base.Base.Height,
  137.                                        format,
  138.                                        irb->mt->region->pitch,
  139.                                        0);
  140.       }
  141.    }
  142. }
  143.  
  144. static const __DRItexBufferExtension intelTexBufferExtension = {
  145.    .base = { __DRI_TEX_BUFFER, 3 },
  146.  
  147.    .setTexBuffer        = intelSetTexBuffer,
  148.    .setTexBuffer2       = intelSetTexBuffer2,
  149.    .releaseTexBuffer    = NULL,
  150. };
  151.  
  152. static void
  153. intelDRI2Flush(__DRIdrawable *drawable)
  154. {
  155.    GET_CURRENT_CONTEXT(ctx);
  156.    struct intel_context *intel = intel_context(ctx);
  157.    if (intel == NULL)
  158.       return;
  159.  
  160.    INTEL_FIREVERTICES(intel);
  161.  
  162.    intel->need_throttle = true;
  163.  
  164.    if (intel->batch.used)
  165.       intel_batchbuffer_flush(intel);
  166.  
  167.    if (INTEL_DEBUG & DEBUG_AUB) {
  168.       aub_dump_bmp(ctx);
  169.    }
  170. }
  171.  
  172. static const struct __DRI2flushExtensionRec intelFlushExtension = {
  173.     .base = { __DRI2_FLUSH, 3 },
  174.  
  175.     .flush              = intelDRI2Flush,
  176.     .invalidate         = dri2InvalidateDrawable,
  177. };
  178.  
  179. static struct intel_image_format intel_image_formats[] = {
  180.    { __DRI_IMAGE_FOURCC_ARGB8888, __DRI_IMAGE_COMPONENTS_RGBA, 1,
  181.      { { 0, 0, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } },
  182.  
  183.    { __DRI_IMAGE_FOURCC_SARGB8888, __DRI_IMAGE_COMPONENTS_RGBA, 1,
  184.      { { 0, 0, 0, __DRI_IMAGE_FORMAT_SARGB8, 4 } } },
  185.  
  186.    { __DRI_IMAGE_FOURCC_XRGB8888, __DRI_IMAGE_COMPONENTS_RGB, 1,
  187.      { { 0, 0, 0, __DRI_IMAGE_FORMAT_XRGB8888, 4 }, } },
  188.  
  189.    { __DRI_IMAGE_FOURCC_YUV410, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
  190.      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
  191.        { 1, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 },
  192.        { 2, 2, 2, __DRI_IMAGE_FORMAT_R8, 1 } } },
  193.  
  194.    { __DRI_IMAGE_FOURCC_YUV411, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
  195.      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
  196.        { 1, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 },
  197.        { 2, 2, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
  198.  
  199.    { __DRI_IMAGE_FOURCC_YUV420, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
  200.      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
  201.        { 1, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 },
  202.        { 2, 1, 1, __DRI_IMAGE_FORMAT_R8, 1 } } },
  203.  
  204.    { __DRI_IMAGE_FOURCC_YUV422, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
  205.      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
  206.        { 1, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 },
  207.        { 2, 1, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
  208.  
  209.    { __DRI_IMAGE_FOURCC_YUV444, __DRI_IMAGE_COMPONENTS_Y_U_V, 3,
  210.      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
  211.        { 1, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
  212.        { 2, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 } } },
  213.  
  214.    { __DRI_IMAGE_FOURCC_NV12, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
  215.      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
  216.        { 1, 1, 1, __DRI_IMAGE_FORMAT_GR88, 2 } } },
  217.  
  218.    { __DRI_IMAGE_FOURCC_NV16, __DRI_IMAGE_COMPONENTS_Y_UV, 2,
  219.      { { 0, 0, 0, __DRI_IMAGE_FORMAT_R8, 1 },
  220.        { 1, 1, 0, __DRI_IMAGE_FORMAT_GR88, 2 } } },
  221.  
  222.    /* For YUYV buffers, we set up two overlapping DRI images and treat
  223.     * them as planar buffers in the compositors.  Plane 0 is GR88 and
  224.     * samples YU or YV pairs and places Y into the R component, while
  225.     * plane 1 is ARGB and samples YUYV clusters and places pairs and
  226.     * places U into the G component and V into A.  This lets the
  227.     * texture sampler interpolate the Y components correctly when
  228.     * sampling from plane 0, and interpolate U and V correctly when
  229.     * sampling from plane 1. */
  230.    { __DRI_IMAGE_FOURCC_YUYV, __DRI_IMAGE_COMPONENTS_Y_XUXV, 2,
  231.      { { 0, 0, 0, __DRI_IMAGE_FORMAT_GR88, 2 },
  232.        { 0, 1, 0, __DRI_IMAGE_FORMAT_ARGB8888, 4 } } }
  233. };
  234.  
  235. static __DRIimage *
  236. intel_allocate_image(int dri_format, void *loaderPrivate)
  237. {
  238.     __DRIimage *image;
  239.  
  240.     image = calloc(1, sizeof *image);
  241.     if (image == NULL)
  242.         return NULL;
  243.  
  244.     image->dri_format = dri_format;
  245.     image->offset = 0;
  246.  
  247.     image->format = driImageFormatToGLFormat(dri_format);
  248.     if (dri_format != __DRI_IMAGE_FORMAT_NONE &&
  249.         image->format == MESA_FORMAT_NONE) {
  250.        free(image);
  251.        return NULL;
  252.     }
  253.  
  254.     image->internal_format = _mesa_get_format_base_format(image->format);
  255.     image->data = loaderPrivate;
  256.  
  257.     return image;
  258. }
  259.  
  260. /**
  261.  * Sets up a DRIImage structure to point to our shared image in a region
  262.  */
  263. static void
  264. intel_setup_image_from_mipmap_tree(struct intel_context *intel, __DRIimage *image,
  265.                                    struct intel_mipmap_tree *mt, GLuint level,
  266.                                    GLuint zoffset)
  267. {
  268.    unsigned int draw_x, draw_y;
  269.    uint32_t mask_x, mask_y;
  270.  
  271.    intel_miptree_check_level_layer(mt, level, zoffset);
  272.  
  273.    intel_region_get_tile_masks(mt->region, &mask_x, &mask_y, false);
  274.    intel_miptree_get_image_offset(mt, level, zoffset, &draw_x, &draw_y);
  275.  
  276.    image->width = mt->level[level].width;
  277.    image->height = mt->level[level].height;
  278.    image->tile_x = draw_x & mask_x;
  279.    image->tile_y = draw_y & mask_y;
  280.  
  281.    image->offset = intel_region_get_aligned_offset(mt->region,
  282.                                                    draw_x & ~mask_x,
  283.                                                    draw_y & ~mask_y,
  284.                                                    false);
  285.  
  286.    intel_region_reference(&image->region, mt->region);
  287. }
  288.  
  289. static void
  290. intel_setup_image_from_dimensions(__DRIimage *image)
  291. {
  292.    image->width    = image->region->width;
  293.    image->height   = image->region->height;
  294.    image->tile_x = 0;
  295.    image->tile_y = 0;
  296. }
  297.  
  298. static __DRIimage *
  299. intel_create_image_from_name(__DRIscreen *screen,
  300.                              int width, int height, int format,
  301.                              int name, int pitch, void *loaderPrivate)
  302. {
  303.     struct intel_screen *intelScreen = screen->driverPrivate;
  304.     __DRIimage *image;
  305.     int cpp;
  306.  
  307.     image = intel_allocate_image(format, loaderPrivate);
  308.     if (image == NULL)
  309.        return NULL;
  310.  
  311.     if (image->format == MESA_FORMAT_NONE)
  312.        cpp = 1;
  313.     else
  314.        cpp = _mesa_get_format_bytes(image->format);
  315.     image->region = intel_region_alloc_for_handle(intelScreen,
  316.                                                   cpp, width, height,
  317.                                                   pitch * cpp, name, "image");
  318.     if (image->region == NULL) {
  319.        free(image);
  320.        return NULL;
  321.     }
  322.  
  323.     intel_setup_image_from_dimensions(image);
  324.  
  325.     return image;      
  326. }
  327.  
  328. static __DRIimage *
  329. intel_create_image_from_renderbuffer(__DRIcontext *context,
  330.                                      int renderbuffer, void *loaderPrivate)
  331. {
  332.    __DRIimage *image;
  333.    struct intel_context *intel = context->driverPrivate;
  334.    struct gl_renderbuffer *rb;
  335.    struct intel_renderbuffer *irb;
  336.  
  337.    rb = _mesa_lookup_renderbuffer(&intel->ctx, renderbuffer);
  338.    if (!rb) {
  339.       _mesa_error(&intel->ctx,
  340.                   GL_INVALID_OPERATION, "glRenderbufferExternalMESA");
  341.       return NULL;
  342.    }
  343.  
  344.    irb = intel_renderbuffer(rb);
  345.    image = calloc(1, sizeof *image);
  346.    if (image == NULL)
  347.       return NULL;
  348.  
  349.    image->internal_format = rb->InternalFormat;
  350.    image->format = rb->Format;
  351.    image->offset = 0;
  352.    image->data = loaderPrivate;
  353.    intel_region_reference(&image->region, irb->mt->region);
  354.    intel_setup_image_from_dimensions(image);
  355.    image->dri_format = driGLFormatToImageFormat(image->format);
  356.  
  357.    rb->NeedsFinishRenderTexture = true;
  358.    return image;
  359. }
  360.  
  361. static __DRIimage *
  362. intel_create_image_from_texture(__DRIcontext *context, int target,
  363.                                 unsigned texture, int zoffset,
  364.                                 int level,
  365.                                 unsigned *error,
  366.                                 void *loaderPrivate)
  367. {
  368.    __DRIimage *image;
  369.    struct intel_context *intel = context->driverPrivate;
  370.    struct gl_texture_object *obj;
  371.    struct intel_texture_object *iobj;
  372.    GLuint face = 0;
  373.  
  374.    obj = _mesa_lookup_texture(&intel->ctx, texture);
  375.    if (!obj || obj->Target != target) {
  376.       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
  377.       return NULL;
  378.    }
  379.  
  380.    if (target == GL_TEXTURE_CUBE_MAP)
  381.       face = zoffset;
  382.  
  383.    _mesa_test_texobj_completeness(&intel->ctx, obj);
  384.    iobj = intel_texture_object(obj);
  385.    if (!obj->_BaseComplete || (level > 0 && !obj->_MipmapComplete)) {
  386.       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
  387.       return NULL;
  388.    }
  389.  
  390.    if (level < obj->BaseLevel || level > obj->_MaxLevel) {
  391.       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
  392.       return NULL;
  393.    }
  394.  
  395.    if (target == GL_TEXTURE_3D && obj->Image[face][level]->Depth < zoffset) {
  396.       *error = __DRI_IMAGE_ERROR_BAD_MATCH;
  397.       return NULL;
  398.    }
  399.    image = calloc(1, sizeof *image);
  400.    if (image == NULL) {
  401.       *error = __DRI_IMAGE_ERROR_BAD_ALLOC;
  402.       return NULL;
  403.    }
  404.  
  405.    image->internal_format = obj->Image[face][level]->InternalFormat;
  406.    image->format = obj->Image[face][level]->TexFormat;
  407.    image->data = loaderPrivate;
  408.    intel_setup_image_from_mipmap_tree(intel, image, iobj->mt, level, zoffset);
  409.    image->dri_format = driGLFormatToImageFormat(image->format);
  410.    if (image->dri_format == MESA_FORMAT_NONE) {
  411.       *error = __DRI_IMAGE_ERROR_BAD_PARAMETER;
  412.       free(image);
  413.       return NULL;
  414.    }
  415.  
  416.    *error = __DRI_IMAGE_ERROR_SUCCESS;
  417.    return image;
  418. }
  419.  
  420. static void
  421. intel_destroy_image(__DRIimage *image)
  422. {
  423.     intel_region_release(&image->region);
  424.     free(image);
  425. }
  426.  
  427. static __DRIimage *
  428. intel_create_image(__DRIscreen *screen,
  429.                    int width, int height, int format,
  430.                    unsigned int use,
  431.                    void *loaderPrivate)
  432. {
  433.    __DRIimage *image;
  434.    struct intel_screen *intelScreen = screen->driverPrivate;
  435.    uint32_t tiling;
  436.    int cpp;
  437.  
  438.    tiling = I915_TILING_X;
  439.    if (use & __DRI_IMAGE_USE_CURSOR) {
  440.       if (width != 64 || height != 64)
  441.          return NULL;
  442.       tiling = I915_TILING_NONE;
  443.    }
  444.  
  445.    if (use & __DRI_IMAGE_USE_LINEAR)
  446.       tiling = I915_TILING_NONE;
  447.  
  448.    image = intel_allocate_image(format, loaderPrivate);
  449.    if (image == NULL)
  450.       return NULL;
  451.  
  452.    cpp = _mesa_get_format_bytes(image->format);
  453.    image->region =
  454.       intel_region_alloc(intelScreen, tiling, cpp, width, height, true);
  455.    if (image->region == NULL) {
  456.       free(image);
  457.       return NULL;
  458.    }
  459.    
  460.    intel_setup_image_from_dimensions(image);
  461.  
  462.    return image;
  463. }
  464.  
  465. static GLboolean
  466. intel_query_image(__DRIimage *image, int attrib, int *value)
  467. {
  468.    switch (attrib) {
  469.    case __DRI_IMAGE_ATTRIB_STRIDE:
  470.       *value = image->region->pitch;
  471.       return true;
  472.    case __DRI_IMAGE_ATTRIB_HANDLE:
  473.       *value = image->region->bo->handle;
  474.       return true;
  475.    case __DRI_IMAGE_ATTRIB_NAME:
  476.       return intel_region_flink(image->region, (uint32_t *) value);
  477.    case __DRI_IMAGE_ATTRIB_FORMAT:
  478.       *value = image->dri_format;
  479.       return true;
  480.    case __DRI_IMAGE_ATTRIB_WIDTH:
  481.       *value = image->region->width;
  482.       return true;
  483.    case __DRI_IMAGE_ATTRIB_HEIGHT:
  484.       *value = image->region->height;
  485.       return true;
  486.    case __DRI_IMAGE_ATTRIB_COMPONENTS:
  487.       if (image->planar_format == NULL)
  488.          return false;
  489.       *value = image->planar_format->components;
  490.       return true;
  491.    case __DRI_IMAGE_ATTRIB_FD:
  492.       if (drm_intel_bo_gem_export_to_prime(image->region->bo, value) == 0)
  493.          return true;
  494.       return false;
  495.   default:
  496.       return false;
  497.    }
  498. }
  499.  
  500. static __DRIimage *
  501. intel_dup_image(__DRIimage *orig_image, void *loaderPrivate)
  502. {
  503.    __DRIimage *image;
  504.  
  505.    image = calloc(1, sizeof *image);
  506.    if (image == NULL)
  507.       return NULL;
  508.  
  509.    intel_region_reference(&image->region, orig_image->region);
  510.    if (image->region == NULL) {
  511.       free(image);
  512.       return NULL;
  513.    }
  514.  
  515.    image->internal_format = orig_image->internal_format;
  516.    image->planar_format   = orig_image->planar_format;
  517.    image->dri_format      = orig_image->dri_format;
  518.    image->format          = orig_image->format;
  519.    image->offset          = orig_image->offset;
  520.    image->width           = orig_image->width;
  521.    image->height          = orig_image->height;
  522.    image->tile_x          = orig_image->tile_x;
  523.    image->tile_y          = orig_image->tile_y;
  524.    image->data            = loaderPrivate;
  525.  
  526.    memcpy(image->strides, orig_image->strides, sizeof(image->strides));
  527.    memcpy(image->offsets, orig_image->offsets, sizeof(image->offsets));
  528.  
  529.    return image;
  530. }
  531.  
  532. static GLboolean
  533. intel_validate_usage(__DRIimage *image, unsigned int use)
  534. {
  535.    if (use & __DRI_IMAGE_USE_CURSOR) {
  536.       if (image->region->width != 64 || image->region->height != 64)
  537.          return GL_FALSE;
  538.    }
  539.  
  540.    return GL_TRUE;
  541. }
  542.  
  543. static __DRIimage *
  544. intel_create_image_from_names(__DRIscreen *screen,
  545.                               int width, int height, int fourcc,
  546.                               int *names, int num_names,
  547.                               int *strides, int *offsets,
  548.                               void *loaderPrivate)
  549. {
  550.     struct intel_image_format *f = NULL;
  551.     __DRIimage *image;
  552.     int i, index;
  553.  
  554.     if (screen == NULL || names == NULL || num_names != 1)
  555.         return NULL;
  556.  
  557.     for (i = 0; i < ARRAY_SIZE(intel_image_formats); i++) {
  558.         if (intel_image_formats[i].fourcc == fourcc) {
  559.            f = &intel_image_formats[i];
  560.         }
  561.     }
  562.  
  563.     if (f == NULL)
  564.         return NULL;
  565.  
  566.     image = intel_create_image_from_name(screen, width, height,
  567.                                          __DRI_IMAGE_FORMAT_NONE,
  568.                                          names[0], strides[0],
  569.                                          loaderPrivate);
  570.  
  571.    if (image == NULL)
  572.       return NULL;
  573.  
  574.     image->planar_format = f;
  575.     for (i = 0; i < f->nplanes; i++) {
  576.         index = f->planes[i].buffer_index;
  577.         image->offsets[index] = offsets[index];
  578.         image->strides[index] = strides[index];
  579.     }
  580.  
  581.     return image;
  582. }
  583.  
  584. static __DRIimage *
  585. intel_create_image_from_fds(__DRIscreen *screen,
  586.                             int width, int height, int fourcc,
  587.                             int *fds, int num_fds, int *strides, int *offsets,
  588.                             void *loaderPrivate)
  589. {
  590.    struct intel_screen *intelScreen = screen->driverPrivate;
  591.    struct intel_image_format *f = NULL;
  592.    __DRIimage *image;
  593.    int i, index;
  594.  
  595.    if (fds == NULL || num_fds != 1)
  596.       return NULL;
  597.  
  598.    for (i = 0; i < ARRAY_SIZE(intel_image_formats); i++) {
  599.       if (intel_image_formats[i].fourcc == fourcc) {
  600.          f = &intel_image_formats[i];
  601.       }
  602.    }
  603.  
  604.    if (f == NULL)
  605.       return NULL;
  606.  
  607.    image = intel_allocate_image(__DRI_IMAGE_FORMAT_NONE, loaderPrivate);
  608.    if (image == NULL)
  609.       return NULL;
  610.  
  611.    image->region = intel_region_alloc_for_fd(intelScreen,
  612.                                              f->planes[0].cpp, width, height, strides[0],
  613.                                              height * strides[0], fds[0], "image");
  614.    if (image->region == NULL) {
  615.       free(image);
  616.       return NULL;
  617.    }
  618.  
  619.    intel_setup_image_from_dimensions(image);
  620.  
  621.    image->planar_format = f;
  622.    for (i = 0; i < f->nplanes; i++) {
  623.       index = f->planes[i].buffer_index;
  624.       image->offsets[index] = offsets[index];
  625.       image->strides[index] = strides[index];
  626.    }
  627.  
  628.    return image;
  629. }
  630.  
  631.  
  632. static __DRIimage *
  633. intel_from_planar(__DRIimage *parent, int plane, void *loaderPrivate)
  634. {
  635.     int width, height, offset, stride, dri_format, index;
  636.     struct intel_image_format *f;
  637.     uint32_t mask_x, mask_y;
  638.     __DRIimage *image;
  639.  
  640.     if (parent == NULL || parent->planar_format == NULL)
  641.         return NULL;
  642.  
  643.     f = parent->planar_format;
  644.  
  645.     if (plane >= f->nplanes)
  646.         return NULL;
  647.  
  648.     width = parent->region->width >> f->planes[plane].width_shift;
  649.     height = parent->region->height >> f->planes[plane].height_shift;
  650.     dri_format = f->planes[plane].dri_format;
  651.     index = f->planes[plane].buffer_index;
  652.     offset = parent->offsets[index];
  653.     stride = parent->strides[index];
  654.  
  655.     image = intel_allocate_image(dri_format, loaderPrivate);
  656.     if (image == NULL)
  657.        return NULL;
  658.  
  659.     if (offset + height * stride > parent->region->bo->size) {
  660.        _mesa_warning(NULL, "intel_create_sub_image: subimage out of bounds");
  661.        free(image);
  662.        return NULL;
  663.     }
  664.  
  665.     image->region = calloc(sizeof(*image->region), 1);
  666.     if (image->region == NULL) {
  667.        free(image);
  668.        return NULL;
  669.     }
  670.  
  671.     image->region->cpp = _mesa_get_format_bytes(image->format);
  672.     image->region->width = width;
  673.     image->region->height = height;
  674.     image->region->pitch = stride;
  675.     image->region->refcount = 1;
  676.     image->region->bo = parent->region->bo;
  677.     drm_intel_bo_reference(image->region->bo);
  678.     image->region->tiling = parent->region->tiling;
  679.     image->offset = offset;
  680.     intel_setup_image_from_dimensions(image);
  681.  
  682.     intel_region_get_tile_masks(image->region, &mask_x, &mask_y, false);
  683.     if (offset & mask_x)
  684.        _mesa_warning(NULL,
  685.                      "intel_create_sub_image: offset not on tile boundary");
  686.  
  687.     return image;
  688. }
  689.  
  690. static const __DRIimageExtension intelImageExtension = {
  691.     .base = { __DRI_IMAGE, 7 },
  692.  
  693.     .createImageFromName                = intel_create_image_from_name,
  694.     .createImageFromRenderbuffer        = intel_create_image_from_renderbuffer,
  695.     .destroyImage                       = intel_destroy_image,
  696.     .createImage                        = intel_create_image,
  697.     .queryImage                         = intel_query_image,
  698.     .dupImage                           = intel_dup_image,
  699.     .validateUsage                      = intel_validate_usage,
  700.     .createImageFromNames               = intel_create_image_from_names,
  701.     .fromPlanar                         = intel_from_planar,
  702.     .createImageFromTexture             = intel_create_image_from_texture,
  703.     .createImageFromFds                 = intel_create_image_from_fds
  704. };
  705.  
  706. static int
  707. i915_query_renderer_integer(__DRIscreen *psp, int param, unsigned int *value)
  708. {
  709.    const struct intel_screen *const intelScreen =
  710.       (struct intel_screen *) psp->driverPrivate;
  711.  
  712.    switch (param) {
  713.    case __DRI2_RENDERER_VENDOR_ID:
  714.       value[0] = 0x8086;
  715.       return 0;
  716.    case __DRI2_RENDERER_DEVICE_ID:
  717.       value[0] = intelScreen->deviceID;
  718.       return 0;
  719.    case __DRI2_RENDERER_ACCELERATED:
  720.       value[0] = 1;
  721.       return 0;
  722.    case __DRI2_RENDERER_VIDEO_MEMORY: {
  723.       /* Once a batch uses more than 75% of the maximum mappable size, we
  724.        * assume that there's some fragmentation, and we start doing extra
  725.        * flushing, etc.  That's the big cliff apps will care about.
  726.        */
  727.       size_t aper_size;
  728.       size_t mappable_size;
  729.  
  730.       drm_intel_get_aperture_sizes(psp->fd, &mappable_size, &aper_size);
  731.  
  732.       const unsigned gpu_mappable_megabytes =
  733.          (aper_size / (1024 * 1024)) * 3 / 4;
  734.  
  735.       const long system_memory_pages = sysconf(_SC_PHYS_PAGES);
  736.       const long system_page_size = sysconf(_SC_PAGE_SIZE);
  737.  
  738.       if (system_memory_pages <= 0 || system_page_size <= 0)
  739.          return -1;
  740.  
  741.       const uint64_t system_memory_bytes = (uint64_t) system_memory_pages
  742.          * (uint64_t) system_page_size;
  743.  
  744.       const unsigned system_memory_megabytes =
  745.          (unsigned) (system_memory_bytes / (1024 * 1024));
  746.  
  747.       value[0] = MIN2(system_memory_megabytes, gpu_mappable_megabytes);
  748.       return 0;
  749.    }
  750.    case __DRI2_RENDERER_UNIFIED_MEMORY_ARCHITECTURE:
  751.       value[0] = 1;
  752.       return 0;
  753.    default:
  754.       return driQueryRendererIntegerCommon(psp, param, value);
  755.    }
  756.  
  757.    return -1;
  758. }
  759.  
  760. static int
  761. i915_query_renderer_string(__DRIscreen *psp, int param, const char **value)
  762. {
  763.    const struct intel_screen *intelScreen =
  764.       (struct intel_screen *) psp->driverPrivate;
  765.  
  766.    switch (param) {
  767.    case __DRI2_RENDERER_VENDOR_ID:
  768.       value[0] = i915_vendor_string;
  769.       return 0;
  770.    case __DRI2_RENDERER_DEVICE_ID:
  771.       value[0] = i915_get_renderer_string(intelScreen->deviceID);
  772.       return 0;
  773.    default:
  774.       break;
  775.    }
  776.  
  777.    return -1;
  778. }
  779.  
  780. static const __DRI2rendererQueryExtension intelRendererQueryExtension = {
  781.    .base = { __DRI2_RENDERER_QUERY, 1 },
  782.  
  783.    .queryInteger = i915_query_renderer_integer,
  784.    .queryString = i915_query_renderer_string
  785. };
  786.  
  787. static const __DRIextension *intelScreenExtensions[] = {
  788.     &intelTexBufferExtension.base,
  789.     &intelFlushExtension.base,
  790.     &intelImageExtension.base,
  791.     &intelRendererQueryExtension.base,
  792.     &dri2ConfigQueryExtension.base,
  793.     NULL
  794. };
  795.  
  796. static bool
  797. intel_get_param(__DRIscreen *psp, int param, int *value)
  798. {
  799.    int ret;
  800.    struct drm_i915_getparam gp;
  801.  
  802.    memset(&gp, 0, sizeof(gp));
  803.    gp.param = param;
  804.    gp.value = value;
  805.  
  806.    ret = drmCommandWriteRead(psp->fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
  807.    if (ret) {
  808.       if (ret != -EINVAL)
  809.          _mesa_warning(NULL, "drm_i915_getparam: %d", ret);
  810.       return false;
  811.    }
  812.  
  813.    return true;
  814. }
  815.  
  816. static bool
  817. intel_get_boolean(__DRIscreen *psp, int param)
  818. {
  819.    int value = 0;
  820.    return intel_get_param(psp, param, &value) && value;
  821. }
  822.  
  823. static void
  824. intelDestroyScreen(__DRIscreen * sPriv)
  825. {
  826.    struct intel_screen *intelScreen = sPriv->driverPrivate;
  827.  
  828.    dri_bufmgr_destroy(intelScreen->bufmgr);
  829.    driDestroyOptionInfo(&intelScreen->optionCache);
  830.  
  831.    free(intelScreen);
  832.    sPriv->driverPrivate = NULL;
  833. }
  834.  
  835.  
  836. /**
  837.  * This is called when we need to set up GL rendering to a new X window.
  838.  */
  839. static GLboolean
  840. intelCreateBuffer(__DRIscreen * driScrnPriv,
  841.                   __DRIdrawable * driDrawPriv,
  842.                   const struct gl_config * mesaVis, GLboolean isPixmap)
  843. {
  844.    struct intel_renderbuffer *rb;
  845.    mesa_format rgbFormat;
  846.    struct gl_framebuffer *fb;
  847.  
  848.    if (isPixmap)
  849.       return false;
  850.  
  851.    fb = CALLOC_STRUCT(gl_framebuffer);
  852.    if (!fb)
  853.       return false;
  854.  
  855.    _mesa_initialize_window_framebuffer(fb, mesaVis);
  856.  
  857.    if (mesaVis->redBits == 5)
  858.       rgbFormat = MESA_FORMAT_B5G6R5_UNORM;
  859.    else if (mesaVis->sRGBCapable)
  860.       rgbFormat = MESA_FORMAT_B8G8R8A8_SRGB;
  861.    else if (mesaVis->alphaBits == 0)
  862.       rgbFormat = MESA_FORMAT_B8G8R8X8_UNORM;
  863.    else
  864.       rgbFormat = MESA_FORMAT_B8G8R8A8_UNORM;
  865.  
  866.    /* setup the hardware-based renderbuffers */
  867.    rb = intel_create_renderbuffer(rgbFormat);
  868.    _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &rb->Base.Base);
  869.  
  870.    if (mesaVis->doubleBufferMode) {
  871.       rb = intel_create_renderbuffer(rgbFormat);
  872.       _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &rb->Base.Base);
  873.    }
  874.  
  875.    /*
  876.     * Assert here that the gl_config has an expected depth/stencil bit
  877.     * combination: one of d24/s8, d16/s0, d0/s0. (See intelInitScreen2(),
  878.     * which constructs the advertised configs.)
  879.     */
  880.    if (mesaVis->depthBits == 24) {
  881.       assert(mesaVis->stencilBits == 8);
  882.  
  883.       /*
  884.        * Use combined depth/stencil. Note that the renderbuffer is
  885.        * attached to two attachment points.
  886.        */
  887.       rb = intel_create_private_renderbuffer(MESA_FORMAT_Z24_UNORM_S8_UINT);
  888.       _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
  889.       _mesa_add_renderbuffer(fb, BUFFER_STENCIL, &rb->Base.Base);
  890.    }
  891.    else if (mesaVis->depthBits == 16) {
  892.       assert(mesaVis->stencilBits == 0);
  893.       rb = intel_create_private_renderbuffer(MESA_FORMAT_Z_UNORM16);
  894.       _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &rb->Base.Base);
  895.    }
  896.    else {
  897.       assert(mesaVis->depthBits == 0);
  898.       assert(mesaVis->stencilBits == 0);
  899.    }
  900.  
  901.    /* now add any/all software-based renderbuffers we may need */
  902.    _swrast_add_soft_renderbuffers(fb,
  903.                                   false, /* never sw color */
  904.                                   false, /* never sw depth */
  905.                                   false, /* never sw stencil */
  906.                                   mesaVis->accumRedBits > 0,
  907.                                   false, /* never sw alpha */
  908.                                   false  /* never sw aux */ );
  909.    driDrawPriv->driverPrivate = fb;
  910.  
  911.    return true;
  912. }
  913.  
  914. static void
  915. intelDestroyBuffer(__DRIdrawable * driDrawPriv)
  916. {
  917.     struct gl_framebuffer *fb = driDrawPriv->driverPrivate;
  918.  
  919.     _mesa_reference_framebuffer(&fb, NULL);
  920. }
  921.  
  922. /* There are probably better ways to do this, such as an
  923.  * init-designated function to register chipids and createcontext
  924.  * functions.
  925.  */
  926. extern bool
  927. i830CreateContext(int api,
  928.                   const struct gl_config *mesaVis,
  929.                   __DRIcontext *driContextPriv,
  930.                   unsigned major_version,
  931.                   unsigned minor_version,
  932.                   uint32_t flags,
  933.                   unsigned *error,
  934.                   void *sharedContextPrivate);
  935.  
  936. extern bool
  937. i915CreateContext(int api,
  938.                   const struct gl_config *mesaVis,
  939.                   __DRIcontext *driContextPriv,
  940.                   unsigned major_version,
  941.                   unsigned minor_version,
  942.                   uint32_t flags,
  943.                   unsigned *error,
  944.                   void *sharedContextPrivate);
  945.  
  946. static GLboolean
  947. intelCreateContext(gl_api api,
  948.                    const struct gl_config * mesaVis,
  949.                    __DRIcontext * driContextPriv,
  950.                    unsigned major_version,
  951.                    unsigned minor_version,
  952.                    uint32_t flags,
  953.                    bool notify_reset,
  954.                    unsigned *error,
  955.                    void *sharedContextPrivate)
  956. {
  957.    bool success = false;
  958.  
  959.    __DRIscreen *sPriv = driContextPriv->driScreenPriv;
  960.    struct intel_screen *intelScreen = sPriv->driverPrivate;
  961.  
  962.    if (flags & ~__DRI_CTX_FLAG_DEBUG) {
  963.       *error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
  964.       return false;
  965.    }
  966.  
  967.    if (notify_reset) {
  968.       *error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
  969.       return false;
  970.    }
  971.  
  972.    if (IS_GEN3(intelScreen->deviceID)) {
  973.       success = i915CreateContext(api, mesaVis, driContextPriv,
  974.                                   major_version, minor_version, flags,
  975.                                   error, sharedContextPrivate);
  976.    } else {
  977.       intelScreen->no_vbo = true;
  978.       success = i830CreateContext(api, mesaVis, driContextPriv,
  979.                                   major_version, minor_version, flags,
  980.                                   error, sharedContextPrivate);
  981.    }
  982.  
  983.    if (success)
  984.       return true;
  985.  
  986.    if (driContextPriv->driverPrivate != NULL)
  987.       intelDestroyContext(driContextPriv);
  988.  
  989.    return false;
  990. }
  991.  
  992. static bool
  993. intel_init_bufmgr(struct intel_screen *intelScreen)
  994. {
  995.    __DRIscreen *spriv = intelScreen->driScrnPriv;
  996.  
  997.    intelScreen->no_hw = getenv("INTEL_NO_HW") != NULL;
  998.  
  999.    intelScreen->bufmgr = intel_bufmgr_gem_init(spriv->fd, BATCH_SZ);
  1000.    if (intelScreen->bufmgr == NULL) {
  1001.       fprintf(stderr, "[%s:%u] Error initializing buffer manager.\n",
  1002.               __func__, __LINE__);
  1003.       return false;
  1004.    }
  1005.  
  1006.    drm_intel_bufmgr_gem_enable_fenced_relocs(intelScreen->bufmgr);
  1007.  
  1008.    if (!intel_get_boolean(spriv, I915_PARAM_HAS_RELAXED_DELTA)) {
  1009.       fprintf(stderr, "[%s: %u] Kernel 2.6.39 required.\n", __func__, __LINE__);
  1010.       return false;
  1011.    }
  1012.  
  1013.    return true;
  1014. }
  1015.  
  1016. static bool
  1017. intel_detect_swizzling(struct intel_screen *screen)
  1018. {
  1019.    drm_intel_bo *buffer;
  1020.    unsigned long flags = 0;
  1021.    unsigned long aligned_pitch;
  1022.    uint32_t tiling = I915_TILING_X;
  1023.    uint32_t swizzle_mode = 0;
  1024.  
  1025.    buffer = drm_intel_bo_alloc_tiled(screen->bufmgr, "swizzle test",
  1026.                                      64, 64, 4,
  1027.                                      &tiling, &aligned_pitch, flags);
  1028.    if (buffer == NULL)
  1029.       return false;
  1030.  
  1031.    drm_intel_bo_get_tiling(buffer, &tiling, &swizzle_mode);
  1032.    drm_intel_bo_unreference(buffer);
  1033.  
  1034.    if (swizzle_mode == I915_BIT_6_SWIZZLE_NONE)
  1035.       return false;
  1036.    else
  1037.       return true;
  1038. }
  1039.  
  1040. static __DRIconfig**
  1041. intel_screen_make_configs(__DRIscreen *dri_screen)
  1042. {
  1043.    static const mesa_format formats[] = {
  1044.       MESA_FORMAT_B5G6R5_UNORM,
  1045.       MESA_FORMAT_B8G8R8A8_UNORM
  1046.    };
  1047.  
  1048.    /* GLX_SWAP_COPY_OML is not supported due to page flipping. */
  1049.    static const GLenum back_buffer_modes[] = {
  1050.        GLX_SWAP_UNDEFINED_OML, GLX_NONE,
  1051.    };
  1052.  
  1053.    static const uint8_t singlesample_samples[1] = {0};
  1054.  
  1055.    uint8_t depth_bits[4], stencil_bits[4];
  1056.    __DRIconfig **configs = NULL;
  1057.  
  1058.    /* Generate singlesample configs without accumulation buffer. */
  1059.    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
  1060.       __DRIconfig **new_configs;
  1061.       int num_depth_stencil_bits = 2;
  1062.  
  1063.       /* Starting with DRI2 protocol version 1.1 we can request a depth/stencil
  1064.        * buffer that has a different number of bits per pixel than the color
  1065.        * buffer.
  1066.        */
  1067.       depth_bits[0] = 0;
  1068.       stencil_bits[0] = 0;
  1069.  
  1070.       if (formats[i] == MESA_FORMAT_B5G6R5_UNORM) {
  1071.          depth_bits[1] = 16;
  1072.          stencil_bits[1] = 0;
  1073.       } else {
  1074.          depth_bits[1] = 24;
  1075.          stencil_bits[1] = 8;
  1076.       }
  1077.  
  1078.       new_configs = driCreateConfigs(formats[i],
  1079.                                      depth_bits,
  1080.                                      stencil_bits,
  1081.                                      num_depth_stencil_bits,
  1082.                                      back_buffer_modes, 2,
  1083.                                      singlesample_samples, 1,
  1084.                                      false);
  1085.       configs = driConcatConfigs(configs, new_configs);
  1086.    }
  1087.  
  1088.    /* Generate the minimum possible set of configs that include an
  1089.     * accumulation buffer.
  1090.     */
  1091.    for (int i = 0; i < ARRAY_SIZE(formats); i++) {
  1092.       __DRIconfig **new_configs;
  1093.  
  1094.       if (formats[i] == MESA_FORMAT_B5G6R5_UNORM) {
  1095.          depth_bits[0] = 16;
  1096.          stencil_bits[0] = 0;
  1097.       } else {
  1098.          depth_bits[0] = 24;
  1099.          stencil_bits[0] = 8;
  1100.       }
  1101.  
  1102.       new_configs = driCreateConfigs(formats[i],
  1103.                                      depth_bits, stencil_bits, 1,
  1104.                                      back_buffer_modes, 1,
  1105.                                      singlesample_samples, 1,
  1106.                                      true);
  1107.       configs = driConcatConfigs(configs, new_configs);
  1108.    }
  1109.  
  1110.    if (configs == NULL) {
  1111.       fprintf(stderr, "[%s:%u] Error creating FBConfig!\n", __func__,
  1112.               __LINE__);
  1113.       return NULL;
  1114.    }
  1115.  
  1116.    return configs;
  1117. }
  1118.  
  1119. static void
  1120. set_max_gl_versions(struct intel_screen *screen)
  1121. {
  1122.    __DRIscreen *psp = screen->driScrnPriv;
  1123.  
  1124.    switch (screen->gen) {
  1125.    case 3:
  1126.       psp->max_gl_core_version = 0;
  1127.       psp->max_gl_es1_version = 11;
  1128.       psp->max_gl_compat_version = 21;
  1129.       psp->max_gl_es2_version = 20;
  1130.       break;
  1131.    case 2:
  1132.       psp->max_gl_core_version = 0;
  1133.       psp->max_gl_compat_version = 13;
  1134.       psp->max_gl_es1_version = 11;
  1135.       psp->max_gl_es2_version = 0;
  1136.       break;
  1137.    default:
  1138.       assert(!"unrecognized intel_screen::gen");
  1139.       break;
  1140.    }
  1141. }
  1142.  
  1143. /**
  1144.  * This is the driver specific part of the createNewScreen entry point.
  1145.  * Called when using DRI2.
  1146.  *
  1147.  * \return the struct gl_config supported by this driver
  1148.  */
  1149. static const
  1150. __DRIconfig **intelInitScreen2(__DRIscreen *psp)
  1151. {
  1152.    struct intel_screen *intelScreen;
  1153.  
  1154.    if (psp->image.loader) {
  1155.    } else if (psp->dri2.loader->base.version <= 2 ||
  1156.        psp->dri2.loader->getBuffersWithFormat == NULL) {
  1157.       fprintf(stderr,
  1158.               "\nERROR!  DRI2 loader with getBuffersWithFormat() "
  1159.               "support required\n");
  1160.       return false;
  1161.    }
  1162.  
  1163.    /* Allocate the private area */
  1164.    intelScreen = calloc(1, sizeof *intelScreen);
  1165.    if (!intelScreen) {
  1166.       fprintf(stderr, "\nERROR!  Allocating private area failed\n");
  1167.       return false;
  1168.    }
  1169.    /* parse information in __driConfigOptions */
  1170.    driParseOptionInfo(&intelScreen->optionCache, i915_config_options.xml);
  1171.  
  1172.    intelScreen->driScrnPriv = psp;
  1173.    psp->driverPrivate = (void *) intelScreen;
  1174.  
  1175.    if (!intel_init_bufmgr(intelScreen))
  1176.        return false;
  1177.  
  1178.    intelScreen->deviceID = drm_intel_bufmgr_gem_get_devid(intelScreen->bufmgr);
  1179.  
  1180.    if (IS_GEN3(intelScreen->deviceID)) {
  1181.       intelScreen->gen = 3;
  1182.    } else {
  1183.       intelScreen->gen = 2;
  1184.    }
  1185.  
  1186.    intelScreen->hw_has_swizzling = intel_detect_swizzling(intelScreen);
  1187.  
  1188.    set_max_gl_versions(intelScreen);
  1189.  
  1190.    psp->extensions = intelScreenExtensions;
  1191.  
  1192.    return (const __DRIconfig**) intel_screen_make_configs(psp);
  1193. }
  1194.  
  1195. struct intel_buffer {
  1196.    __DRIbuffer base;
  1197.    struct intel_region *region;
  1198. };
  1199.  
  1200. static __DRIbuffer *
  1201. intelAllocateBuffer(__DRIscreen *screen,
  1202.                     unsigned attachment, unsigned format,
  1203.                     int width, int height)
  1204. {
  1205.    struct intel_buffer *intelBuffer;
  1206.    struct intel_screen *intelScreen = screen->driverPrivate;
  1207.  
  1208.    assert(attachment == __DRI_BUFFER_FRONT_LEFT ||
  1209.           attachment == __DRI_BUFFER_BACK_LEFT);
  1210.  
  1211.    intelBuffer = calloc(1, sizeof *intelBuffer);
  1212.    if (intelBuffer == NULL)
  1213.       return NULL;
  1214.  
  1215.    /* The front and back buffers are color buffers, which are X tiled. */
  1216.    intelBuffer->region = intel_region_alloc(intelScreen,
  1217.                                             I915_TILING_X,
  1218.                                             format / 8,
  1219.                                             width,
  1220.                                             height,
  1221.                                             true);
  1222.    
  1223.    if (intelBuffer->region == NULL) {
  1224.            free(intelBuffer);
  1225.            return NULL;
  1226.    }
  1227.    
  1228.    intel_region_flink(intelBuffer->region, &intelBuffer->base.name);
  1229.  
  1230.    intelBuffer->base.attachment = attachment;
  1231.    intelBuffer->base.cpp = intelBuffer->region->cpp;
  1232.    intelBuffer->base.pitch = intelBuffer->region->pitch;
  1233.  
  1234.    return &intelBuffer->base;
  1235. }
  1236.  
  1237. static void
  1238. intelReleaseBuffer(__DRIscreen *screen, __DRIbuffer *buffer)
  1239. {
  1240.    struct intel_buffer *intelBuffer = (struct intel_buffer *) buffer;
  1241.  
  1242.    intel_region_release(&intelBuffer->region);
  1243.    free(intelBuffer);
  1244. }
  1245.  
  1246.  
  1247. static const struct __DriverAPIRec i915_driver_api = {
  1248.    .InitScreen           = intelInitScreen2,
  1249.    .DestroyScreen        = intelDestroyScreen,
  1250.    .CreateContext        = intelCreateContext,
  1251.    .DestroyContext       = intelDestroyContext,
  1252.    .CreateBuffer         = intelCreateBuffer,
  1253.    .DestroyBuffer        = intelDestroyBuffer,
  1254.    .MakeCurrent          = intelMakeCurrent,
  1255.    .UnbindContext        = intelUnbindContext,
  1256.    .AllocateBuffer       = intelAllocateBuffer,
  1257.    .ReleaseBuffer        = intelReleaseBuffer
  1258. };
  1259.  
  1260. static const struct __DRIDriverVtableExtensionRec i915_vtable = {
  1261.    .base = { __DRI_DRIVER_VTABLE, 1 },
  1262.    .vtable = &i915_driver_api,
  1263. };
  1264.  
  1265. /* This is the table of extensions that the loader will dlsym() for. */
  1266. static const __DRIextension *i915_driver_extensions[] = {
  1267.     &driCoreExtension.base,
  1268.     &driImageDriverExtension.base,
  1269.     &driDRI2Extension.base,
  1270.     &i915_vtable.base,
  1271.     &i915_config_options.base,
  1272.     NULL
  1273. };
  1274.  
  1275. PUBLIC const __DRIextension **__driDriverGetExtensions_i915(void)
  1276. {
  1277.    globalDriverAPI = &i915_driver_api;
  1278.  
  1279.    return i915_driver_extensions;
  1280. }
  1281.