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  1. /**************************************************************************
  2.  *
  3.  * Copyright 2006 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/enums.h"
  30. #include "main/imports.h"
  31. #include "main/macros.h"
  32. #include "main/mtypes.h"
  33. #include "main/fbobject.h"
  34. #include "main/framebuffer.h"
  35. #include "main/renderbuffer.h"
  36. #include "main/context.h"
  37. #include "main/teximage.h"
  38. #include "main/image.h"
  39.  
  40. #include "swrast/swrast.h"
  41. #include "drivers/common/meta.h"
  42.  
  43. #include "intel_context.h"
  44. #include "intel_batchbuffer.h"
  45. #include "intel_buffers.h"
  46. #include "intel_blit.h"
  47. #include "intel_fbo.h"
  48. #include "intel_mipmap_tree.h"
  49. #include "intel_regions.h"
  50. #include "intel_tex.h"
  51.  
  52. #define FILE_DEBUG_FLAG DEBUG_FBO
  53.  
  54. static struct gl_renderbuffer *
  55. intel_new_renderbuffer(struct gl_context * ctx, GLuint name);
  56.  
  57. struct intel_region*
  58. intel_get_rb_region(struct gl_framebuffer *fb, GLuint attIndex)
  59. {
  60.    struct intel_renderbuffer *irb = intel_get_renderbuffer(fb, attIndex);
  61.    if (irb && irb->mt)
  62.       return irb->mt->region;
  63.    else
  64.       return NULL;
  65. }
  66.  
  67. /**
  68.  * Create a new framebuffer object.
  69.  */
  70. static struct gl_framebuffer *
  71. intel_new_framebuffer(struct gl_context * ctx, GLuint name)
  72. {
  73.    /* Only drawable state in intel_framebuffer at this time, just use Mesa's
  74.     * class
  75.     */
  76.    return _mesa_new_framebuffer(ctx, name);
  77. }
  78.  
  79.  
  80. /** Called by gl_renderbuffer::Delete() */
  81. static void
  82. intel_delete_renderbuffer(struct gl_context *ctx, struct gl_renderbuffer *rb)
  83. {
  84.    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
  85.  
  86.    assert(irb);
  87.  
  88.    intel_miptree_release(&irb->mt);
  89.  
  90.    _mesa_delete_renderbuffer(ctx, rb);
  91. }
  92.  
  93. /**
  94.  * \see dd_function_table::MapRenderbuffer
  95.  */
  96. static void
  97. intel_map_renderbuffer(struct gl_context *ctx,
  98.                        struct gl_renderbuffer *rb,
  99.                        GLuint x, GLuint y, GLuint w, GLuint h,
  100.                        GLbitfield mode,
  101.                        GLubyte **out_map,
  102.                        GLint *out_stride)
  103. {
  104.    struct intel_context *intel = intel_context(ctx);
  105.    struct swrast_renderbuffer *srb = (struct swrast_renderbuffer *)rb;
  106.    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
  107.    void *map;
  108.    int stride;
  109.  
  110.    if (srb->Buffer) {
  111.       /* this is a malloc'd renderbuffer (accum buffer), not an irb */
  112.       GLint bpp = _mesa_get_format_bytes(rb->Format);
  113.       GLint rowStride = srb->RowStride;
  114.       *out_map = (GLubyte *) srb->Buffer + y * rowStride + x * bpp;
  115.       *out_stride = rowStride;
  116.       return;
  117.    }
  118.  
  119.    intel_prepare_render(intel);
  120.  
  121.    /* For a window-system renderbuffer, we need to flip the mapping we receive
  122.     * upside-down.  So we need to ask for a rectangle on flipped vertically, and
  123.     * we then return a pointer to the bottom of it with a negative stride.
  124.     */
  125.    if (rb->Name == 0) {
  126.       y = rb->Height - y - h;
  127.    }
  128.  
  129.    intel_miptree_map(intel, irb->mt, irb->mt_level, irb->mt_layer,
  130.                      x, y, w, h, mode, &map, &stride);
  131.  
  132.    if (rb->Name == 0) {
  133.       map += (h - 1) * stride;
  134.       stride = -stride;
  135.    }
  136.  
  137.    DBG("%s: rb %d (%s) mt mapped: (%d, %d) (%dx%d) -> %p/%d\n",
  138.        __func__, rb->Name, _mesa_get_format_name(rb->Format),
  139.        x, y, w, h, map, stride);
  140.  
  141.    *out_map = map;
  142.    *out_stride = stride;
  143. }
  144.  
  145. /**
  146.  * \see dd_function_table::UnmapRenderbuffer
  147.  */
  148. static void
  149. intel_unmap_renderbuffer(struct gl_context *ctx,
  150.                          struct gl_renderbuffer *rb)
  151. {
  152.    struct intel_context *intel = intel_context(ctx);
  153.    struct swrast_renderbuffer *srb = (struct swrast_renderbuffer *)rb;
  154.    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
  155.  
  156.    DBG("%s: rb %d (%s)\n", __func__,
  157.        rb->Name, _mesa_get_format_name(rb->Format));
  158.  
  159.    if (srb->Buffer) {
  160.       /* this is a malloc'd renderbuffer (accum buffer) */
  161.       /* nothing to do */
  162.       return;
  163.    }
  164.  
  165.    intel_miptree_unmap(intel, irb->mt, irb->mt_level, irb->mt_layer);
  166. }
  167.  
  168. static mesa_format
  169. intel_renderbuffer_format(struct gl_context * ctx, GLenum internalFormat)
  170. {
  171.    struct intel_context *intel = intel_context(ctx);
  172.  
  173.    switch (internalFormat) {
  174.    default:
  175.       /* Use the same format-choice logic as for textures.
  176.        * Renderbuffers aren't any different from textures for us,
  177.        * except they're less useful because you can't texture with
  178.        * them.
  179.        */
  180.       return intel->ctx.Driver.ChooseTextureFormat(ctx, GL_TEXTURE_2D,
  181.                                                    internalFormat,
  182.                                                    GL_NONE, GL_NONE);
  183.  
  184.    case GL_DEPTH_COMPONENT16:
  185.       return MESA_FORMAT_Z_UNORM16;
  186.    case GL_DEPTH_COMPONENT:
  187.    case GL_DEPTH_COMPONENT24:
  188.    case GL_DEPTH_COMPONENT32:
  189.       return MESA_FORMAT_Z24_UNORM_X8_UINT;
  190.    case GL_DEPTH_STENCIL_EXT:
  191.    case GL_DEPTH24_STENCIL8_EXT:
  192.    case GL_STENCIL_INDEX:
  193.    case GL_STENCIL_INDEX1_EXT:
  194.    case GL_STENCIL_INDEX4_EXT:
  195.    case GL_STENCIL_INDEX8_EXT:
  196.    case GL_STENCIL_INDEX16_EXT:
  197.       /* These aren't actual texture formats, so force them here. */
  198.       return MESA_FORMAT_Z24_UNORM_S8_UINT;
  199.    }
  200. }
  201.  
  202. static GLboolean
  203. intel_alloc_private_renderbuffer_storage(struct gl_context * ctx, struct gl_renderbuffer *rb,
  204.                                          GLenum internalFormat,
  205.                                          GLuint width, GLuint height)
  206. {
  207.    struct intel_context *intel = intel_context(ctx);
  208.    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
  209.  
  210.    assert(rb->Format != MESA_FORMAT_NONE);
  211.  
  212.    rb->Width = width;
  213.    rb->Height = height;
  214.    rb->_BaseFormat = _mesa_base_fbo_format(ctx, internalFormat);
  215.  
  216.    intel_miptree_release(&irb->mt);
  217.  
  218.    DBG("%s: %s: %s (%dx%d)\n", __func__,
  219.        _mesa_lookup_enum_by_nr(internalFormat),
  220.        _mesa_get_format_name(rb->Format), width, height);
  221.  
  222.    if (width == 0 || height == 0)
  223.       return true;
  224.  
  225.    irb->mt = intel_miptree_create_for_renderbuffer(intel, rb->Format,
  226.                                                    width, height);
  227.    if (!irb->mt)
  228.       return false;
  229.  
  230.    return true;
  231. }
  232.  
  233. /**
  234.  * Called via glRenderbufferStorageEXT() to set the format and allocate
  235.  * storage for a user-created renderbuffer.
  236.  */
  237. static GLboolean
  238. intel_alloc_renderbuffer_storage(struct gl_context * ctx, struct gl_renderbuffer *rb,
  239.                                  GLenum internalFormat,
  240.                                  GLuint width, GLuint height)
  241. {
  242.    rb->Format = intel_renderbuffer_format(ctx, internalFormat);
  243.    return intel_alloc_private_renderbuffer_storage(ctx, rb, internalFormat, width, height);
  244. }
  245.  
  246. static void
  247. intel_image_target_renderbuffer_storage(struct gl_context *ctx,
  248.                                         struct gl_renderbuffer *rb,
  249.                                         void *image_handle)
  250. {
  251.    struct intel_context *intel = intel_context(ctx);
  252.    struct intel_renderbuffer *irb;
  253.    __DRIscreen *screen;
  254.    __DRIimage *image;
  255.  
  256.    screen = intel->intelScreen->driScrnPriv;
  257.    image = screen->dri2.image->lookupEGLImage(screen, image_handle,
  258.                                               screen->loaderPrivate);
  259.    if (image == NULL)
  260.       return;
  261.  
  262.    /* __DRIimage is opaque to the core so it has to be checked here */
  263.    switch (image->format) {
  264.    case MESA_FORMAT_R8G8B8A8_UNORM:
  265.       _mesa_error(&intel->ctx, GL_INVALID_OPERATION,
  266.             "glEGLImageTargetRenderbufferStorage(unsupported image format");
  267.       return;
  268.       break;
  269.    default:
  270.       break;
  271.    }
  272.  
  273.    irb = intel_renderbuffer(rb);
  274.    intel_miptree_release(&irb->mt);
  275.    irb->mt = intel_miptree_create_for_bo(intel,
  276.                                          image->region->bo,
  277.                                          image->format,
  278.                                          image->offset,
  279.                                          image->region->width,
  280.                                          image->region->height,
  281.                                          image->region->pitch,
  282.                                          image->region->tiling);
  283.    if (!irb->mt)
  284.       return;
  285.  
  286.    rb->InternalFormat = image->internal_format;
  287.    rb->Width = image->region->width;
  288.    rb->Height = image->region->height;
  289.    rb->Format = image->format;
  290.    rb->_BaseFormat = _mesa_get_format_base_format(image->format);
  291.    rb->NeedsFinishRenderTexture = true;
  292. }
  293.  
  294. /**
  295.  * Called by _mesa_resize_framebuffer() for each hardware renderbuffer when a
  296.  * window system framebuffer is resized.
  297.  *
  298.  * Any actual buffer reallocations for hardware renderbuffers (which would
  299.  * have triggered _mesa_resize_framebuffer()) were done by
  300.  * intel_process_dri2_buffer().
  301.  */
  302. static GLboolean
  303. intel_alloc_window_storage(struct gl_context * ctx, struct gl_renderbuffer *rb,
  304.                            GLenum internalFormat, GLuint width, GLuint height)
  305. {
  306.    assert(rb->Name == 0);
  307.    rb->Width = width;
  308.    rb->Height = height;
  309.    rb->InternalFormat = internalFormat;
  310.  
  311.    return true;
  312. }
  313.  
  314. /** Dummy function for gl_renderbuffer::AllocStorage() */
  315. static GLboolean
  316. intel_nop_alloc_storage(struct gl_context * ctx, struct gl_renderbuffer *rb,
  317.                         GLenum internalFormat, GLuint width, GLuint height)
  318. {
  319.    _mesa_problem(ctx, "intel_op_alloc_storage should never be called.");
  320.    return false;
  321. }
  322.  
  323. /**
  324.  * Create a new intel_renderbuffer which corresponds to an on-screen window,
  325.  * not a user-created renderbuffer.
  326.  */
  327. struct intel_renderbuffer *
  328. intel_create_renderbuffer(mesa_format format)
  329. {
  330.    struct intel_renderbuffer *irb;
  331.    struct gl_renderbuffer *rb;
  332.  
  333.    GET_CURRENT_CONTEXT(ctx);
  334.  
  335.    irb = CALLOC_STRUCT(intel_renderbuffer);
  336.    if (!irb) {
  337.       _mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer");
  338.       return NULL;
  339.    }
  340.  
  341.    rb = &irb->Base.Base;
  342.  
  343.    _mesa_init_renderbuffer(rb, 0);
  344.    rb->ClassID = INTEL_RB_CLASS;
  345.    rb->_BaseFormat = _mesa_get_format_base_format(format);
  346.    rb->Format = format;
  347.    rb->InternalFormat = rb->_BaseFormat;
  348.  
  349.    /* intel-specific methods */
  350.    rb->Delete = intel_delete_renderbuffer;
  351.    rb->AllocStorage = intel_alloc_window_storage;
  352.  
  353.    return irb;
  354. }
  355.  
  356. /**
  357.  * Private window-system buffers (as opposed to ones shared with the display
  358.  * server created with intel_create_renderbuffer()) are most similar in their
  359.  * handling to user-created renderbuffers, but they have a resize handler that
  360.  * may be called at intel_update_renderbuffers() time.
  361.  */
  362. struct intel_renderbuffer *
  363. intel_create_private_renderbuffer(mesa_format format)
  364. {
  365.    struct intel_renderbuffer *irb;
  366.  
  367.    irb = intel_create_renderbuffer(format);
  368.    irb->Base.Base.AllocStorage = intel_alloc_private_renderbuffer_storage;
  369.  
  370.    return irb;
  371. }
  372.  
  373. /**
  374.  * Create a new renderbuffer object.
  375.  * Typically called via glBindRenderbufferEXT().
  376.  */
  377. static struct gl_renderbuffer *
  378. intel_new_renderbuffer(struct gl_context * ctx, GLuint name)
  379. {
  380.    /*struct intel_context *intel = intel_context(ctx); */
  381.    struct intel_renderbuffer *irb;
  382.    struct gl_renderbuffer *rb;
  383.  
  384.    irb = CALLOC_STRUCT(intel_renderbuffer);
  385.    if (!irb) {
  386.       _mesa_error(ctx, GL_OUT_OF_MEMORY, "creating renderbuffer");
  387.       return NULL;
  388.    }
  389.  
  390.    rb = &irb->Base.Base;
  391.  
  392.    _mesa_init_renderbuffer(rb, name);
  393.    rb->ClassID = INTEL_RB_CLASS;
  394.  
  395.    /* intel-specific methods */
  396.    rb->Delete = intel_delete_renderbuffer;
  397.    rb->AllocStorage = intel_alloc_renderbuffer_storage;
  398.    /* span routines set in alloc_storage function */
  399.  
  400.    return rb;
  401. }
  402.  
  403.  
  404. /**
  405.  * Called via glBindFramebufferEXT().
  406.  */
  407. static void
  408. intel_bind_framebuffer(struct gl_context * ctx, GLenum target,
  409.                        struct gl_framebuffer *fb, struct gl_framebuffer *fbread)
  410. {
  411.    if (target == GL_FRAMEBUFFER_EXT || target == GL_DRAW_FRAMEBUFFER_EXT) {
  412.       intel_draw_buffer(ctx);
  413.    }
  414.    else {
  415.       /* don't need to do anything if target == GL_READ_FRAMEBUFFER_EXT */
  416.    }
  417. }
  418.  
  419.  
  420. /**
  421.  * Called via glFramebufferRenderbufferEXT().
  422.  */
  423. static void
  424. intel_framebuffer_renderbuffer(struct gl_context * ctx,
  425.                                struct gl_framebuffer *fb,
  426.                                GLenum attachment, struct gl_renderbuffer *rb)
  427. {
  428.    DBG("Intel FramebufferRenderbuffer %u %u\n", fb->Name, rb ? rb->Name : 0);
  429.  
  430.    _mesa_FramebufferRenderbuffer_sw(ctx, fb, attachment, rb);
  431.    intel_draw_buffer(ctx);
  432. }
  433.  
  434. static bool
  435. intel_renderbuffer_update_wrapper(struct intel_context *intel,
  436.                                   struct intel_renderbuffer *irb,
  437.                                   struct gl_texture_image *image,
  438.                                   uint32_t layer)
  439. {
  440.    struct gl_renderbuffer *rb = &irb->Base.Base;
  441.    struct intel_texture_image *intel_image = intel_texture_image(image);
  442.    struct intel_mipmap_tree *mt = intel_image->mt;
  443.    int level = image->Level;
  444.  
  445.    rb->AllocStorage = intel_nop_alloc_storage;
  446.  
  447.    intel_miptree_check_level_layer(mt, level, layer);
  448.    irb->mt_level = level;
  449.    irb->mt_layer = layer;
  450.  
  451.    intel_miptree_reference(&irb->mt, mt);
  452.  
  453.    intel_renderbuffer_set_draw_offset(irb);
  454.  
  455.    return true;
  456. }
  457.  
  458. void
  459. intel_renderbuffer_set_draw_offset(struct intel_renderbuffer *irb)
  460. {
  461.    unsigned int dst_x, dst_y;
  462.  
  463.    /* compute offset of the particular 2D image within the texture region */
  464.    intel_miptree_get_image_offset(irb->mt,
  465.                                   irb->mt_level,
  466.                                   irb->mt_layer,
  467.                                   &dst_x, &dst_y);
  468.  
  469.    irb->draw_x = dst_x;
  470.    irb->draw_y = dst_y;
  471. }
  472.  
  473. /**
  474.  * Called by glFramebufferTexture[123]DEXT() (and other places) to
  475.  * prepare for rendering into texture memory.  This might be called
  476.  * many times to choose different texture levels, cube faces, etc
  477.  * before intel_finish_render_texture() is ever called.
  478.  */
  479. static void
  480. intel_render_texture(struct gl_context * ctx,
  481.                      struct gl_framebuffer *fb,
  482.                      struct gl_renderbuffer_attachment *att)
  483. {
  484.    struct intel_context *intel = intel_context(ctx);
  485.    struct gl_renderbuffer *rb = att->Renderbuffer;
  486.    struct intel_renderbuffer *irb = intel_renderbuffer(rb);
  487.    struct gl_texture_image *image = rb->TexImage;
  488.    struct intel_texture_image *intel_image = intel_texture_image(image);
  489.    struct intel_mipmap_tree *mt = intel_image->mt;
  490.    int layer;
  491.  
  492.    (void) fb;
  493.  
  494.    if (att->CubeMapFace > 0) {
  495.       assert(att->Zoffset == 0);
  496.       layer = att->CubeMapFace;
  497.    } else {
  498.       layer = att->Zoffset;
  499.    }
  500.  
  501.    if (!intel_image->mt) {
  502.       /* Fallback on drawing to a texture that doesn't have a miptree
  503.        * (has a border, width/height 0, etc.)
  504.        */
  505.       _swrast_render_texture(ctx, fb, att);
  506.       return;
  507.    }
  508.  
  509.    intel_miptree_check_level_layer(mt, att->TextureLevel, layer);
  510.  
  511.    if (!intel_renderbuffer_update_wrapper(intel, irb, image, layer)) {
  512.        _swrast_render_texture(ctx, fb, att);
  513.        return;
  514.    }
  515.  
  516.    DBG("Begin render %s texture tex=%u w=%d h=%d d=%d refcount=%d\n",
  517.        _mesa_get_format_name(image->TexFormat),
  518.        att->Texture->Name, image->Width, image->Height, image->Depth,
  519.        rb->RefCount);
  520.  
  521.    /* update drawing region, etc */
  522.    intel_draw_buffer(ctx);
  523. }
  524.  
  525.  
  526. /**
  527.  * Called by Mesa when rendering to a texture is done.
  528.  */
  529. static void
  530. intel_finish_render_texture(struct gl_context * ctx, struct gl_renderbuffer *rb)
  531. {
  532.    struct intel_context *intel = intel_context(ctx);
  533.  
  534.    DBG("Finish render %s texture\n", _mesa_get_format_name(rb->Format));
  535.  
  536.    /* Since we've (probably) rendered to the texture and will (likely) use
  537.     * it in the texture domain later on in this batchbuffer, flush the
  538.     * batch.  Once again, we wish for a domain tracker in libdrm to cover
  539.     * usage inside of a batchbuffer like GEM does in the kernel.
  540.     */
  541.    intel_batchbuffer_emit_mi_flush(intel);
  542. }
  543.  
  544. #define fbo_incomplete(fb, ...) do {                                          \
  545.       static GLuint msg_id = 0;                                               \
  546.       if (unlikely(ctx->Const.ContextFlags & GL_CONTEXT_FLAG_DEBUG_BIT)) {    \
  547.          _mesa_gl_debug(ctx, &msg_id,                                         \
  548.                         MESA_DEBUG_SOURCE_API,                                \
  549.                         MESA_DEBUG_TYPE_OTHER,                                \
  550.                         MESA_DEBUG_SEVERITY_MEDIUM,                           \
  551.                         __VA_ARGS__);                                         \
  552.       }                                                                       \
  553.       DBG(__VA_ARGS__);                                                       \
  554.       fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED;                               \
  555.    } while (0)
  556.  
  557. /**
  558.  * Do additional "completeness" testing of a framebuffer object.
  559.  */
  560. static void
  561. intel_validate_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
  562. {
  563.    struct intel_context *intel = intel_context(ctx);
  564.    struct intel_renderbuffer *depthRb =
  565.       intel_get_renderbuffer(fb, BUFFER_DEPTH);
  566.    struct intel_renderbuffer *stencilRb =
  567.       intel_get_renderbuffer(fb, BUFFER_STENCIL);
  568.    struct intel_mipmap_tree *depth_mt = NULL, *stencil_mt = NULL;
  569.    int i;
  570.  
  571.    DBG("%s() on fb %p (%s)\n", __func__,
  572.        fb, (fb == ctx->DrawBuffer ? "drawbuffer" :
  573.             (fb == ctx->ReadBuffer ? "readbuffer" : "other buffer")));
  574.  
  575.    if (depthRb)
  576.       depth_mt = depthRb->mt;
  577.    if (stencilRb)
  578.       stencil_mt = stencilRb->mt;
  579.  
  580.    if (depth_mt && stencil_mt) {
  581.       /* Make sure that the depth and stencil buffers are actually the same
  582.        * slice of the same miptree, since we only support packed
  583.        * depth/stencil.
  584.        */
  585.       if (depth_mt == stencil_mt) {
  586.          if (depthRb->mt_level != stencilRb->mt_level ||
  587.              depthRb->mt_layer != stencilRb->mt_layer) {
  588.             fbo_incomplete(fb,
  589.                            "FBO incomplete: depth image level/layer %d/%d != "
  590.                            "stencil image %d/%d\n",
  591.                            depthRb->mt_level,
  592.                            depthRb->mt_layer,
  593.                            stencilRb->mt_level,
  594.                            stencilRb->mt_layer);
  595.          }
  596.       } else {
  597.          fbo_incomplete(fb, "FBO incomplete: separate stencil unsupported\n");
  598.       }
  599.    }
  600.  
  601.    for (i = 0; i < ARRAY_SIZE(fb->Attachment); i++) {
  602.       struct gl_renderbuffer *rb;
  603.       struct intel_renderbuffer *irb;
  604.  
  605.       if (fb->Attachment[i].Type == GL_NONE)
  606.          continue;
  607.  
  608.       /* A supported attachment will have a Renderbuffer set either
  609.        * from being a Renderbuffer or being a texture that got the
  610.        * intel_wrap_texture() treatment.
  611.        */
  612.       rb = fb->Attachment[i].Renderbuffer;
  613.       if (rb == NULL) {
  614.          fbo_incomplete(fb, "FBO incomplete: attachment without "
  615.                         "renderbuffer\n");
  616.          continue;
  617.       }
  618.  
  619.       if (fb->Attachment[i].Type == GL_TEXTURE) {
  620.          if (rb->TexImage->Border) {
  621.             fbo_incomplete(fb, "FBO incomplete: texture with border\n");
  622.             continue;
  623.          }
  624.       }
  625.  
  626.       irb = intel_renderbuffer(rb);
  627.       if (irb == NULL) {
  628.          fbo_incomplete(fb, "FBO incomplete: software rendering "
  629.                         "renderbuffer\n");
  630.          continue;
  631.       }
  632.  
  633.       if (!intel->vtbl.render_target_supported(intel, rb)) {
  634.          fbo_incomplete(fb, "FBO incomplete: Unsupported HW "
  635.                         "texture/renderbuffer format attached: %s\n",
  636.                         _mesa_get_format_name(intel_rb_format(irb)));
  637.       }
  638.    }
  639. }
  640.  
  641. /**
  642.  * Try to do a glBlitFramebuffer using glCopyTexSubImage2D
  643.  * We can do this when the dst renderbuffer is actually a texture and
  644.  * there is no scaling, mirroring or scissoring.
  645.  *
  646.  * \return new buffer mask indicating the buffers left to blit using the
  647.  *         normal path.
  648.  */
  649. static GLbitfield
  650. intel_blit_framebuffer_with_blitter(struct gl_context *ctx,
  651.                                     const struct gl_framebuffer *readFb,
  652.                                     const struct gl_framebuffer *drawFb,
  653.                                     GLint srcX0, GLint srcY0,
  654.                                     GLint srcX1, GLint srcY1,
  655.                                     GLint dstX0, GLint dstY0,
  656.                                     GLint dstX1, GLint dstY1,
  657.                                     GLbitfield mask, GLenum filter)
  658. {
  659.    struct intel_context *intel = intel_context(ctx);
  660.  
  661.    if (mask & GL_COLOR_BUFFER_BIT) {
  662.       GLint i;
  663.       struct gl_renderbuffer *src_rb = readFb->_ColorReadBuffer;
  664.       struct intel_renderbuffer *src_irb = intel_renderbuffer(src_rb);
  665.  
  666.       if (!src_irb) {
  667.          perf_debug("glBlitFramebuffer(): missing src renderbuffer.  "
  668.                     "Falling back to software rendering.\n");
  669.          return mask;
  670.       }
  671.  
  672.       /* If the source and destination are the same size with no mirroring,
  673.        * the rectangles are within the size of the texture and there is no
  674.        * scissor, then we can probably use the blit engine.
  675.        */
  676.       if (!(srcX0 - srcX1 == dstX0 - dstX1 &&
  677.             srcY0 - srcY1 == dstY0 - dstY1 &&
  678.             srcX1 >= srcX0 &&
  679.             srcY1 >= srcY0 &&
  680.             srcX0 >= 0 && srcX1 <= readFb->Width &&
  681.             srcY0 >= 0 && srcY1 <= readFb->Height &&
  682.             dstX0 >= 0 && dstX1 <= drawFb->Width &&
  683.             dstY0 >= 0 && dstY1 <= drawFb->Height &&
  684.             !ctx->Scissor.EnableFlags)) {
  685.          perf_debug("glBlitFramebuffer(): non-1:1 blit.  "
  686.                     "Falling back to software rendering.\n");
  687.          return mask;
  688.       }
  689.  
  690.       /* Blit to all active draw buffers.  We don't do any pre-checking,
  691.        * because we assume that copying to MRTs is rare, and failure midway
  692.        * through copying is even more rare.  Even if it was to occur, it's
  693.        * safe to let meta start the copy over from scratch, because
  694.        * glBlitFramebuffer completely overwrites the destination pixels, and
  695.        * results are undefined if any destination pixels have a dependency on
  696.        * source pixels.
  697.        */
  698.       for (i = 0; i < drawFb->_NumColorDrawBuffers; i++) {
  699.          struct gl_renderbuffer *dst_rb = drawFb->_ColorDrawBuffers[i];
  700.          struct intel_renderbuffer *dst_irb = intel_renderbuffer(dst_rb);
  701.  
  702.          if (!dst_irb) {
  703.             perf_debug("glBlitFramebuffer(): missing dst renderbuffer.  "
  704.                        "Falling back to software rendering.\n");
  705.             return mask;
  706.          }
  707.  
  708.          mesa_format src_format = _mesa_get_srgb_format_linear(src_rb->Format);
  709.          mesa_format dst_format = _mesa_get_srgb_format_linear(dst_rb->Format);
  710.          if (src_format != dst_format) {
  711.             perf_debug("glBlitFramebuffer(): unsupported blit from %s to %s.  "
  712.                        "Falling back to software rendering.\n",
  713.                        _mesa_get_format_name(src_format),
  714.                        _mesa_get_format_name(dst_format));
  715.             return mask;
  716.          }
  717.  
  718.          if (!intel_miptree_blit(intel,
  719.                                  src_irb->mt,
  720.                                  src_irb->mt_level, src_irb->mt_layer,
  721.                                  srcX0, srcY0, src_rb->Name == 0,
  722.                                  dst_irb->mt,
  723.                                  dst_irb->mt_level, dst_irb->mt_layer,
  724.                                  dstX0, dstY0, dst_rb->Name == 0,
  725.                                  dstX1 - dstX0, dstY1 - dstY0, GL_COPY)) {
  726.             perf_debug("glBlitFramebuffer(): unknown blit failure.  "
  727.                        "Falling back to software rendering.\n");
  728.             return mask;
  729.          }
  730.       }
  731.  
  732.       mask &= ~GL_COLOR_BUFFER_BIT;
  733.    }
  734.  
  735.    return mask;
  736. }
  737.  
  738. static void
  739. intel_blit_framebuffer(struct gl_context *ctx,
  740.                        struct gl_framebuffer *readFb,
  741.                        struct gl_framebuffer *drawFb,
  742.                        GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
  743.                        GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
  744.                        GLbitfield mask, GLenum filter)
  745. {
  746.    /* Try using the BLT engine. */
  747.    mask = intel_blit_framebuffer_with_blitter(ctx, readFb, drawFb,
  748.                                               srcX0, srcY0, srcX1, srcY1,
  749.                                               dstX0, dstY0, dstX1, dstY1,
  750.                                               mask, filter);
  751.    if (mask == 0x0)
  752.       return;
  753.  
  754.  
  755.    _mesa_meta_and_swrast_BlitFramebuffer(ctx, readFb, drawFb,
  756.                                          srcX0, srcY0, srcX1, srcY1,
  757.                                          dstX0, dstY0, dstX1, dstY1,
  758.                                          mask, filter);
  759. }
  760.  
  761. /**
  762.  * Do one-time context initializations related to GL_EXT_framebuffer_object.
  763.  * Hook in device driver functions.
  764.  */
  765. void
  766. intel_fbo_init(struct intel_context *intel)
  767. {
  768.    intel->ctx.Driver.NewFramebuffer = intel_new_framebuffer;
  769.    intel->ctx.Driver.NewRenderbuffer = intel_new_renderbuffer;
  770.    intel->ctx.Driver.MapRenderbuffer = intel_map_renderbuffer;
  771.    intel->ctx.Driver.UnmapRenderbuffer = intel_unmap_renderbuffer;
  772.    intel->ctx.Driver.BindFramebuffer = intel_bind_framebuffer;
  773.    intel->ctx.Driver.FramebufferRenderbuffer = intel_framebuffer_renderbuffer;
  774.    intel->ctx.Driver.RenderTexture = intel_render_texture;
  775.    intel->ctx.Driver.FinishRenderTexture = intel_finish_render_texture;
  776.    intel->ctx.Driver.ValidateFramebuffer = intel_validate_framebuffer;
  777.    intel->ctx.Driver.BlitFramebuffer = intel_blit_framebuffer;
  778.    intel->ctx.Driver.EGLImageTargetRenderbufferStorage =
  779.       intel_image_target_renderbuffer_storage;
  780. }
  781.