Subversion Repositories Kolibri OS

Rev

Rev 4358 | Blame | Compare with Previous | Last modification | View Log | RSS feed

  1. /*
  2.  * Mesa 3-D graphics library
  3.  *
  4.  * Copyright (C) 2010 LunarG Inc.
  5.  *
  6.  * Permission is hereby granted, free of charge, to any person obtaining a
  7.  * copy of this software and associated documentation files (the "Software"),
  8.  * to deal in the Software without restriction, including without limitation
  9.  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10.  * and/or sell copies of the Software, and to permit persons to whom the
  11.  * Software is furnished to do so, subject to the following conditions:
  12.  *
  13.  * The above copyright notice and this permission notice shall be included
  14.  * in all copies or substantial portions of the Software.
  15.  *
  16.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17.  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18.  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19.  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20.  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21.  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22.  * DEALINGS IN THE SOFTWARE.
  23.  *
  24.  * Authors:
  25.  *    Chia-I Wu <olv@lunarg.com>
  26.  */
  27.  
  28. #include "main/mtypes.h"
  29. #include "main/context.h"
  30. #include "main/texobj.h"
  31. #include "main/teximage.h"
  32. #include "main/texstate.h"
  33. #include "main/framebuffer.h"
  34. #include "main/fbobject.h"
  35. #include "main/renderbuffer.h"
  36. #include "main/version.h"
  37. #include "st_texture.h"
  38.  
  39. #include "st_context.h"
  40. #include "st_format.h"
  41. #include "st_cb_fbo.h"
  42. #include "st_cb_flush.h"
  43. #include "st_manager.h"
  44.  
  45. #include "state_tracker/st_gl_api.h"
  46.  
  47. #include "pipe/p_context.h"
  48. #include "pipe/p_screen.h"
  49. #include "util/u_format.h"
  50. #include "util/u_pointer.h"
  51. #include "util/u_inlines.h"
  52. #include "util/u_atomic.h"
  53. #include "util/u_surface.h"
  54.  
  55. /**
  56.  * Cast wrapper to convert a struct gl_framebuffer to an st_framebuffer.
  57.  * Return NULL if the struct gl_framebuffer is a user-created framebuffer.
  58.  * We'll only return non-null for window system framebuffers.
  59.  * Note that this function may fail.
  60.  */
  61. static INLINE struct st_framebuffer *
  62. st_ws_framebuffer(struct gl_framebuffer *fb)
  63. {
  64.    /* FBO cannot be casted.  See st_new_framebuffer */
  65.    if (fb && _mesa_is_winsys_fbo(fb))
  66.       return (struct st_framebuffer *) fb;
  67.    return NULL;
  68. }
  69.  
  70. /**
  71.  * Map an attachment to a buffer index.
  72.  */
  73. static INLINE gl_buffer_index
  74. attachment_to_buffer_index(enum st_attachment_type statt)
  75. {
  76.    gl_buffer_index index;
  77.  
  78.    switch (statt) {
  79.    case ST_ATTACHMENT_FRONT_LEFT:
  80.       index = BUFFER_FRONT_LEFT;
  81.       break;
  82.    case ST_ATTACHMENT_BACK_LEFT:
  83.       index = BUFFER_BACK_LEFT;
  84.       break;
  85.    case ST_ATTACHMENT_FRONT_RIGHT:
  86.       index = BUFFER_FRONT_RIGHT;
  87.       break;
  88.    case ST_ATTACHMENT_BACK_RIGHT:
  89.       index = BUFFER_BACK_RIGHT;
  90.       break;
  91.    case ST_ATTACHMENT_DEPTH_STENCIL:
  92.       index = BUFFER_DEPTH;
  93.       break;
  94.    case ST_ATTACHMENT_ACCUM:
  95.       index = BUFFER_ACCUM;
  96.       break;
  97.    case ST_ATTACHMENT_SAMPLE:
  98.    default:
  99.       index = BUFFER_COUNT;
  100.       break;
  101.    }
  102.  
  103.    return index;
  104. }
  105.  
  106. /**
  107.  * Map a buffer index to an attachment.
  108.  */
  109. static INLINE enum st_attachment_type
  110. buffer_index_to_attachment(gl_buffer_index index)
  111. {
  112.    enum st_attachment_type statt;
  113.  
  114.    switch (index) {
  115.    case BUFFER_FRONT_LEFT:
  116.       statt = ST_ATTACHMENT_FRONT_LEFT;
  117.       break;
  118.    case BUFFER_BACK_LEFT:
  119.       statt = ST_ATTACHMENT_BACK_LEFT;
  120.       break;
  121.    case BUFFER_FRONT_RIGHT:
  122.       statt = ST_ATTACHMENT_FRONT_RIGHT;
  123.       break;
  124.    case BUFFER_BACK_RIGHT:
  125.       statt = ST_ATTACHMENT_BACK_RIGHT;
  126.       break;
  127.    case BUFFER_DEPTH:
  128.       statt = ST_ATTACHMENT_DEPTH_STENCIL;
  129.       break;
  130.    case BUFFER_ACCUM:
  131.       statt = ST_ATTACHMENT_ACCUM;
  132.       break;
  133.    default:
  134.       statt = ST_ATTACHMENT_INVALID;
  135.       break;
  136.    }
  137.  
  138.    return statt;
  139. }
  140.  
  141. /**
  142.  * Make sure a context picks up the latest cached state of the
  143.  * drawables it binds to.
  144.  */
  145. static void
  146. st_context_validate(struct st_context *st,
  147.                     struct st_framebuffer *stdraw,
  148.                     struct st_framebuffer *stread)
  149. {
  150.     if (stdraw && stdraw->stamp != st->draw_stamp) {
  151.        st->dirty.st |= ST_NEW_FRAMEBUFFER;
  152.        _mesa_resize_framebuffer(st->ctx, &stdraw->Base,
  153.                                 stdraw->Base.Width,
  154.                                 stdraw->Base.Height);
  155.        st->draw_stamp = stdraw->stamp;
  156.     }
  157.  
  158.     if (stread && stread->stamp != st->read_stamp) {
  159.        if (stread != stdraw) {
  160.           st->dirty.st |= ST_NEW_FRAMEBUFFER;
  161.           _mesa_resize_framebuffer(st->ctx, &stread->Base,
  162.                                    stread->Base.Width,
  163.                                    stread->Base.Height);
  164.        }
  165.        st->read_stamp = stread->stamp;
  166.     }
  167. }
  168.  
  169. /**
  170.  * Validate a framebuffer to make sure up-to-date pipe_textures are used.
  171.  * The context is only used for creating pipe surfaces and for calling
  172.  * _mesa_resize_framebuffer().
  173.  * (That should probably be rethought, since those surfaces become
  174.  * drawable state, not context state, and can be freed by another pipe
  175.  * context).
  176.  */
  177. static void
  178. st_framebuffer_validate(struct st_framebuffer *stfb,
  179.                         struct st_context *st)
  180. {
  181.    struct pipe_resource *textures[ST_ATTACHMENT_COUNT];
  182.    uint width, height;
  183.    unsigned i;
  184.    boolean changed = FALSE;
  185.    int32_t new_stamp = p_atomic_read(&stfb->iface->stamp);
  186.  
  187.    if (stfb->iface_stamp == new_stamp)
  188.       return;
  189.  
  190.    /* validate the fb */
  191.    do {
  192.       if (!stfb->iface->validate(&st->iface, stfb->iface, stfb->statts,
  193.                                  stfb->num_statts, textures))
  194.          return;
  195.  
  196.       stfb->iface_stamp = new_stamp;
  197.       new_stamp = p_atomic_read(&stfb->iface->stamp);
  198.    } while(stfb->iface_stamp != new_stamp);
  199.  
  200.    width = stfb->Base.Width;
  201.    height = stfb->Base.Height;
  202.  
  203.    for (i = 0; i < stfb->num_statts; i++) {
  204.       struct st_renderbuffer *strb;
  205.       struct pipe_surface *ps, surf_tmpl;
  206.       gl_buffer_index idx;
  207.  
  208.       if (!textures[i])
  209.          continue;
  210.  
  211.       idx = attachment_to_buffer_index(stfb->statts[i]);
  212.       if (idx >= BUFFER_COUNT) {
  213.          pipe_resource_reference(&textures[i], NULL);
  214.          continue;
  215.       }
  216.  
  217.       strb = st_renderbuffer(stfb->Base.Attachment[idx].Renderbuffer);
  218.       assert(strb);
  219.       if (strb->texture == textures[i]) {
  220.          pipe_resource_reference(&textures[i], NULL);
  221.          continue;
  222.       }
  223.  
  224.       u_surface_default_template(&surf_tmpl, textures[i]);
  225.       ps = st->pipe->create_surface(st->pipe, textures[i], &surf_tmpl);
  226.       if (ps) {
  227.          pipe_surface_reference(&strb->surface, ps);
  228.          pipe_resource_reference(&strb->texture, ps->texture);
  229.          /* ownership transfered */
  230.          pipe_surface_reference(&ps, NULL);
  231.  
  232.          changed = TRUE;
  233.  
  234.          strb->Base.Width = strb->surface->width;
  235.          strb->Base.Height = strb->surface->height;
  236.  
  237.          width = strb->Base.Width;
  238.          height = strb->Base.Height;
  239.       }
  240.  
  241.       pipe_resource_reference(&textures[i], NULL);
  242.    }
  243.  
  244.    if (changed) {
  245.       ++stfb->stamp;
  246.       _mesa_resize_framebuffer(st->ctx, &stfb->Base, width, height);
  247.    }
  248. }
  249.  
  250. /**
  251.  * Update the attachments to validate by looping the existing renderbuffers.
  252.  */
  253. static void
  254. st_framebuffer_update_attachments(struct st_framebuffer *stfb)
  255. {
  256.    gl_buffer_index idx;
  257.  
  258.    stfb->num_statts = 0;
  259.    for (idx = 0; idx < BUFFER_COUNT; idx++) {
  260.       struct st_renderbuffer *strb;
  261.       enum st_attachment_type statt;
  262.  
  263.       strb = st_renderbuffer(stfb->Base.Attachment[idx].Renderbuffer);
  264.       if (!strb || strb->software)
  265.          continue;
  266.  
  267.       statt = buffer_index_to_attachment(idx);
  268.       if (statt != ST_ATTACHMENT_INVALID &&
  269.           st_visual_have_buffers(stfb->iface->visual, 1 << statt))
  270.          stfb->statts[stfb->num_statts++] = statt;
  271.    }
  272.    stfb->stamp++;
  273. }
  274.  
  275. /**
  276.  * Add a renderbuffer to the framebuffer.
  277.  */
  278. static boolean
  279. st_framebuffer_add_renderbuffer(struct st_framebuffer *stfb,
  280.                                 gl_buffer_index idx)
  281. {
  282.    struct gl_renderbuffer *rb;
  283.    enum pipe_format format;
  284.    boolean sw;
  285.  
  286.    if (!stfb->iface)
  287.       return FALSE;
  288.  
  289.    /* do not distinguish depth/stencil buffers */
  290.    if (idx == BUFFER_STENCIL)
  291.       idx = BUFFER_DEPTH;
  292.  
  293.    switch (idx) {
  294.    case BUFFER_DEPTH:
  295.       format = stfb->iface->visual->depth_stencil_format;
  296.       sw = FALSE;
  297.       break;
  298.    case BUFFER_ACCUM:
  299.       format = stfb->iface->visual->accum_format;
  300.       sw = TRUE;
  301.       break;
  302.    default:
  303.       format = stfb->iface->visual->color_format;
  304.       sw = FALSE;
  305.       break;
  306.    }
  307.  
  308.    if (format == PIPE_FORMAT_NONE)
  309.       return FALSE;
  310.  
  311.    rb = st_new_renderbuffer_fb(format, stfb->iface->visual->samples, sw);
  312.    if (!rb)
  313.       return FALSE;
  314.  
  315.    if (idx != BUFFER_DEPTH) {
  316.       _mesa_add_renderbuffer(&stfb->Base, idx, rb);
  317.    }
  318.    else {
  319.       if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 0))
  320.          _mesa_add_renderbuffer(&stfb->Base, BUFFER_DEPTH, rb);
  321.       if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 1))
  322.          _mesa_add_renderbuffer(&stfb->Base, BUFFER_STENCIL, rb);
  323.    }
  324.  
  325.    return TRUE;
  326. }
  327.  
  328. /**
  329.  * Intialize a struct gl_config from a visual.
  330.  */
  331. static void
  332. st_visual_to_context_mode(const struct st_visual *visual,
  333.                           struct gl_config *mode)
  334. {
  335.    memset(mode, 0, sizeof(*mode));
  336.  
  337.    if (st_visual_have_buffers(visual, ST_ATTACHMENT_BACK_LEFT_MASK))
  338.       mode->doubleBufferMode = GL_TRUE;
  339.    if (st_visual_have_buffers(visual,
  340.             ST_ATTACHMENT_FRONT_RIGHT_MASK | ST_ATTACHMENT_BACK_RIGHT_MASK))
  341.       mode->stereoMode = GL_TRUE;
  342.  
  343.    if (visual->color_format != PIPE_FORMAT_NONE) {
  344.       mode->rgbMode = GL_TRUE;
  345.  
  346.       mode->redBits =
  347.          util_format_get_component_bits(visual->color_format,
  348.                UTIL_FORMAT_COLORSPACE_RGB, 0);
  349.       mode->greenBits =
  350.          util_format_get_component_bits(visual->color_format,
  351.                UTIL_FORMAT_COLORSPACE_RGB, 1);
  352.       mode->blueBits =
  353.          util_format_get_component_bits(visual->color_format,
  354.                UTIL_FORMAT_COLORSPACE_RGB, 2);
  355.       mode->alphaBits =
  356.          util_format_get_component_bits(visual->color_format,
  357.                UTIL_FORMAT_COLORSPACE_RGB, 3);
  358.  
  359.       mode->rgbBits = mode->redBits +
  360.          mode->greenBits + mode->blueBits + mode->alphaBits;
  361.    }
  362.  
  363.    if (visual->depth_stencil_format != PIPE_FORMAT_NONE) {
  364.       mode->depthBits =
  365.          util_format_get_component_bits(visual->depth_stencil_format,
  366.                UTIL_FORMAT_COLORSPACE_ZS, 0);
  367.       mode->stencilBits =
  368.          util_format_get_component_bits(visual->depth_stencil_format,
  369.                UTIL_FORMAT_COLORSPACE_ZS, 1);
  370.  
  371.       mode->haveDepthBuffer = mode->depthBits > 0;
  372.       mode->haveStencilBuffer = mode->stencilBits > 0;
  373.    }
  374.  
  375.    if (visual->accum_format != PIPE_FORMAT_NONE) {
  376.       mode->haveAccumBuffer = GL_TRUE;
  377.  
  378.       mode->accumRedBits =
  379.          util_format_get_component_bits(visual->accum_format,
  380.                UTIL_FORMAT_COLORSPACE_RGB, 0);
  381.       mode->accumGreenBits =
  382.          util_format_get_component_bits(visual->accum_format,
  383.                UTIL_FORMAT_COLORSPACE_RGB, 1);
  384.       mode->accumBlueBits =
  385.          util_format_get_component_bits(visual->accum_format,
  386.                UTIL_FORMAT_COLORSPACE_RGB, 2);
  387.       mode->accumAlphaBits =
  388.          util_format_get_component_bits(visual->accum_format,
  389.                UTIL_FORMAT_COLORSPACE_RGB, 3);
  390.    }
  391.  
  392.    if (visual->samples > 1) {
  393.       mode->sampleBuffers = 1;
  394.       mode->samples = visual->samples;
  395.    }
  396. }
  397.  
  398. /**
  399.  * Create a framebuffer from a manager interface.
  400.  */
  401. static struct st_framebuffer *
  402. st_framebuffer_create(struct st_framebuffer_iface *stfbi)
  403. {
  404.    struct st_framebuffer *stfb;
  405.    struct gl_config mode;
  406.    gl_buffer_index idx;
  407.  
  408.    if (!stfbi)
  409.       return NULL;
  410.  
  411.    stfb = CALLOC_STRUCT(st_framebuffer);
  412.    if (!stfb)
  413.       return NULL;
  414.  
  415.    st_visual_to_context_mode(stfbi->visual, &mode);
  416.    _mesa_initialize_window_framebuffer(&stfb->Base, &mode);
  417.  
  418.    stfb->iface = stfbi;
  419.    stfb->iface_stamp = p_atomic_read(&stfbi->stamp) - 1;
  420.  
  421.    /* add the color buffer */
  422.    idx = stfb->Base._ColorDrawBufferIndexes[0];
  423.    if (!st_framebuffer_add_renderbuffer(stfb, idx)) {
  424.       free(stfb);
  425.       return NULL;
  426.    }
  427.  
  428.    st_framebuffer_add_renderbuffer(stfb, BUFFER_DEPTH);
  429.    st_framebuffer_add_renderbuffer(stfb, BUFFER_ACCUM);
  430.  
  431.    stfb->stamp = 0;
  432.    st_framebuffer_update_attachments(stfb);
  433.  
  434.    return stfb;
  435. }
  436.  
  437. /**
  438.  * Reference a framebuffer.
  439.  */
  440. static void
  441. st_framebuffer_reference(struct st_framebuffer **ptr,
  442.                          struct st_framebuffer *stfb)
  443. {
  444.    struct gl_framebuffer *fb = &stfb->Base;
  445.    _mesa_reference_framebuffer((struct gl_framebuffer **) ptr, fb);
  446. }
  447.  
  448. static void
  449. st_context_flush(struct st_context_iface *stctxi, unsigned flags,
  450.                  struct pipe_fence_handle **fence)
  451. {
  452.    struct st_context *st = (struct st_context *) stctxi;
  453.    unsigned pipe_flags = 0;
  454.  
  455.    if (flags & ST_FLUSH_END_OF_FRAME) {
  456.       pipe_flags |= PIPE_FLUSH_END_OF_FRAME;
  457.    }
  458.  
  459.    st_flush(st, fence, pipe_flags);
  460.    if (flags & ST_FLUSH_FRONT)
  461.       st_manager_flush_frontbuffer(st);
  462. }
  463.  
  464. static boolean
  465. st_context_teximage(struct st_context_iface *stctxi,
  466.                     enum st_texture_type tex_type,
  467.                     int level, enum pipe_format pipe_format,
  468.                     struct pipe_resource *tex, boolean mipmap)
  469. {
  470.    struct st_context *st = (struct st_context *) stctxi;
  471.    struct gl_context *ctx = st->ctx;
  472.    struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
  473.    struct gl_texture_object *texObj;
  474.    struct gl_texture_image *texImage;
  475.    struct st_texture_object *stObj;
  476.    struct st_texture_image *stImage;
  477.    GLenum internalFormat;
  478.    GLuint width, height, depth;
  479.    GLenum target;
  480.  
  481.    switch (tex_type) {
  482.    case ST_TEXTURE_1D:
  483.       target = GL_TEXTURE_1D;
  484.       break;
  485.    case ST_TEXTURE_2D:
  486.       target = GL_TEXTURE_2D;
  487.       break;
  488.    case ST_TEXTURE_3D:
  489.       target = GL_TEXTURE_3D;
  490.       break;
  491.    case ST_TEXTURE_RECT:
  492.       target = GL_TEXTURE_RECTANGLE_ARB;
  493.       break;
  494.    default:
  495.       return FALSE;
  496.    }
  497.  
  498.    texObj = _mesa_select_tex_object(ctx, texUnit, target);
  499.    _mesa_lock_texture(ctx, texObj);
  500.  
  501.    stObj = st_texture_object(texObj);
  502.    /* switch to surface based */
  503.    if (!stObj->surface_based) {
  504.       _mesa_clear_texture_object(ctx, texObj);
  505.       stObj->surface_based = GL_TRUE;
  506.    }
  507.  
  508.    texImage = _mesa_get_tex_image(ctx, texObj, target, level);
  509.    stImage = st_texture_image(texImage);
  510.    if (tex) {
  511.       gl_format texFormat = st_pipe_format_to_mesa_format(pipe_format);
  512.  
  513.       if (util_format_has_alpha(tex->format))
  514.          internalFormat = GL_RGBA;
  515.       else
  516.          internalFormat = GL_RGB;
  517.  
  518.       _mesa_init_teximage_fields(ctx, texImage,
  519.                                  tex->width0, tex->height0, 1, 0,
  520.                                  internalFormat, texFormat);
  521.  
  522.       width = tex->width0;
  523.       height = tex->height0;
  524.       depth = tex->depth0;
  525.  
  526.       /* grow the image size until we hit level = 0 */
  527.       while (level > 0) {
  528.          if (width != 1)
  529.             width <<= 1;
  530.          if (height != 1)
  531.             height <<= 1;
  532.          if (depth != 1)
  533.             depth <<= 1;
  534.          level--;
  535.       }
  536.    }
  537.    else {
  538.       _mesa_clear_texture_image(ctx, texImage);
  539.       width = height = depth = 0;
  540.    }
  541.  
  542.    pipe_resource_reference(&stImage->pt, tex);
  543.    stObj->width0 = width;
  544.    stObj->height0 = height;
  545.    stObj->depth0 = depth;
  546.    stObj->surface_format = pipe_format;
  547.  
  548.    _mesa_dirty_texobj(ctx, texObj, GL_TRUE);
  549.    _mesa_unlock_texture(ctx, texObj);
  550.  
  551.    return TRUE;
  552. }
  553.  
  554. static void
  555. st_context_copy(struct st_context_iface *stctxi,
  556.                 struct st_context_iface *stsrci, unsigned mask)
  557. {
  558.    struct st_context *st = (struct st_context *) stctxi;
  559.    struct st_context *src = (struct st_context *) stsrci;
  560.  
  561.    _mesa_copy_context(src->ctx, st->ctx, mask);
  562. }
  563.  
  564. static boolean
  565. st_context_share(struct st_context_iface *stctxi,
  566.                  struct st_context_iface *stsrci)
  567. {
  568.    struct st_context *st = (struct st_context *) stctxi;
  569.    struct st_context *src = (struct st_context *) stsrci;
  570.  
  571.    return _mesa_share_state(st->ctx, src->ctx);
  572. }
  573.  
  574. static void
  575. st_context_destroy(struct st_context_iface *stctxi)
  576. {
  577.    struct st_context *st = (struct st_context *) stctxi;
  578.    st_destroy_context(st);
  579. }
  580.  
  581. static struct st_context_iface *
  582. st_api_create_context(struct st_api *stapi, struct st_manager *smapi,
  583.                       const struct st_context_attribs *attribs,
  584.                       enum st_context_error *error,
  585.                       struct st_context_iface *shared_stctxi)
  586. {
  587.    struct st_context *shared_ctx = (struct st_context *) shared_stctxi;
  588.    struct st_context *st;
  589.    struct pipe_context *pipe;
  590.    struct gl_config mode;
  591.    gl_api api;
  592.  
  593.    if (!(stapi->profile_mask & (1 << attribs->profile)))
  594.       return NULL;
  595.  
  596.    switch (attribs->profile) {
  597.    case ST_PROFILE_DEFAULT:
  598.       api = API_OPENGL_COMPAT;
  599.       break;
  600.    case ST_PROFILE_OPENGL_ES1:
  601.       api = API_OPENGLES;
  602.       break;
  603.    case ST_PROFILE_OPENGL_ES2:
  604.       api = API_OPENGLES2;
  605.       break;
  606.    case ST_PROFILE_OPENGL_CORE:
  607.       api = API_OPENGL_CORE;
  608.       break;
  609.    default:
  610.       *error = ST_CONTEXT_ERROR_BAD_API;
  611.       return NULL;
  612.       break;
  613.    }
  614.  
  615.    pipe = smapi->screen->context_create(smapi->screen, NULL);
  616.    if (!pipe) {
  617.       *error = ST_CONTEXT_ERROR_NO_MEMORY;
  618.       return NULL;
  619.    }
  620.  
  621.    st_visual_to_context_mode(&attribs->visual, &mode);
  622.    st = st_create_context(api, pipe, &mode, shared_ctx, &attribs->options);
  623.    if (!st) {
  624.       *error = ST_CONTEXT_ERROR_NO_MEMORY;
  625.       pipe->destroy(pipe);
  626.       return NULL;
  627.    }
  628.  
  629.    if (attribs->flags & ST_CONTEXT_FLAG_DEBUG)
  630.       st->ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_DEBUG_BIT;
  631.    if (attribs->flags & ST_CONTEXT_FLAG_FORWARD_COMPATIBLE)
  632.       st->ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT;
  633.  
  634. #if 0
  635.    /* need to perform version check */
  636.    if (attribs->major > 1 || attribs->minor > 0) {
  637.       /* Is the actual version less than the requested version?
  638.        */
  639.       if (st->ctx->Version < attribs->major * 10 + attribs->minor) {
  640.          *error = ST_CONTEXT_ERROR_BAD_VERSION;
  641.          st_destroy_context(st);
  642.          return NULL;
  643.       }
  644.    }
  645. #endif
  646.  
  647.    st->invalidate_on_gl_viewport =
  648.       smapi->get_param(smapi, ST_MANAGER_BROKEN_INVALIDATE);
  649.  
  650.    st->iface.destroy = st_context_destroy;
  651.    st->iface.flush = st_context_flush;
  652.    st->iface.teximage = st_context_teximage;
  653.    st->iface.copy = st_context_copy;
  654.    st->iface.share = st_context_share;
  655.    st->iface.st_context_private = (void *) smapi;
  656.    st->iface.cso_context = st->cso_context;
  657.    st->iface.pipe = st->pipe;
  658.  
  659.    *error = ST_CONTEXT_SUCCESS;
  660.    return &st->iface;
  661. }
  662.  
  663. static struct st_context_iface *
  664. st_api_get_current(struct st_api *stapi)
  665. {
  666.    GET_CURRENT_CONTEXT(ctx);
  667.    struct st_context *st = (ctx) ? ctx->st : NULL;
  668.  
  669.    return (st) ? &st->iface : NULL;
  670. }
  671.  
  672. static struct st_framebuffer *
  673. st_framebuffer_reuse_or_create(struct gl_framebuffer *fb,
  674.                                struct st_framebuffer_iface *stfbi)
  675. {
  676.    struct st_framebuffer *cur = st_ws_framebuffer(fb), *stfb = NULL;
  677.  
  678.    /* dummy framebuffers cant be used as st_framebuffer */
  679.    if (cur && &cur->Base != _mesa_get_incomplete_framebuffer() &&
  680.        cur->iface == stfbi) {
  681.       /* reuse the current stfb */
  682.       st_framebuffer_reference(&stfb, cur);
  683.    }
  684.    else {
  685.       /* create a new one */
  686.       stfb = st_framebuffer_create(stfbi);
  687.    }
  688.  
  689.    return stfb;
  690. }
  691.  
  692. static boolean
  693. st_api_make_current(struct st_api *stapi, struct st_context_iface *stctxi,
  694.                     struct st_framebuffer_iface *stdrawi,
  695.                     struct st_framebuffer_iface *streadi)
  696. {
  697.    struct st_context *st = (struct st_context *) stctxi;
  698.    struct st_framebuffer *stdraw, *stread;
  699.    boolean ret;
  700.  
  701.    _glapi_check_multithread();
  702.  
  703.    if (st) {
  704.       /* reuse or create the draw fb */
  705.       stdraw = st_framebuffer_reuse_or_create(st->ctx->WinSysDrawBuffer,
  706.                                               stdrawi);
  707.       if (streadi != stdrawi) {
  708.          /* do the same for the read fb */
  709.          stread = st_framebuffer_reuse_or_create(st->ctx->WinSysReadBuffer,
  710.                                                  streadi);
  711.       }
  712.       else {
  713.          stread = NULL;
  714.          /* reuse the draw fb for the read fb */
  715.          if (stdraw)
  716.             st_framebuffer_reference(&stread, stdraw);
  717.       }
  718.  
  719.       if (stdraw && stread) {
  720.          st_framebuffer_validate(stdraw, st);
  721.          if (stread != stdraw)
  722.             st_framebuffer_validate(stread, st);
  723.  
  724.          ret = _mesa_make_current(st->ctx, &stdraw->Base, &stread->Base);
  725.  
  726.          st->draw_stamp = stdraw->stamp - 1;
  727.          st->read_stamp = stread->stamp - 1;
  728.          st_context_validate(st, stdraw, stread);
  729.       }
  730.       else {
  731.          struct gl_framebuffer *incomplete = _mesa_get_incomplete_framebuffer();
  732.          ret = _mesa_make_current(st->ctx, incomplete, incomplete);
  733.       }
  734.  
  735.       st_framebuffer_reference(&stdraw, NULL);
  736.       st_framebuffer_reference(&stread, NULL);
  737.    }
  738.    else {
  739.       ret = _mesa_make_current(NULL, NULL, NULL);
  740.    }
  741.  
  742.    return ret;
  743. }
  744.  
  745. static st_proc_t
  746. st_api_get_proc_address(struct st_api *stapi, const char *procname)
  747. {
  748.    return (st_proc_t) _glapi_get_proc_address(procname);
  749. }
  750.  
  751. static void
  752. st_api_destroy(struct st_api *stapi)
  753. {
  754. }
  755.  
  756. /**
  757.  * Flush the front buffer if the current context renders to the front buffer.
  758.  */
  759. void
  760. st_manager_flush_frontbuffer(struct st_context *st)
  761. {
  762.    struct st_framebuffer *stfb = st_ws_framebuffer(st->ctx->DrawBuffer);
  763.    struct st_renderbuffer *strb = NULL;
  764.  
  765.    if (stfb)
  766.       strb = st_renderbuffer(stfb->Base.Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
  767.    if (!strb)
  768.       return;
  769.  
  770.    /* never a dummy fb */
  771.    assert(&stfb->Base != _mesa_get_incomplete_framebuffer());
  772.    stfb->iface->flush_front(&st->iface, stfb->iface, ST_ATTACHMENT_FRONT_LEFT);
  773. }
  774.  
  775. /**
  776.  * Return the surface of an EGLImage.
  777.  * FIXME: I think this should operate on resources, not surfaces
  778.  */
  779. struct pipe_surface *
  780. st_manager_get_egl_image_surface(struct st_context *st, void *eglimg)
  781. {
  782.    struct st_manager *smapi =
  783.       (struct st_manager *) st->iface.st_context_private;
  784.    struct st_egl_image stimg;
  785.    struct pipe_surface *ps, surf_tmpl;
  786.  
  787.    if (!smapi || !smapi->get_egl_image)
  788.       return NULL;
  789.  
  790.    memset(&stimg, 0, sizeof(stimg));
  791.    if (!smapi->get_egl_image(smapi, eglimg, &stimg))
  792.       return NULL;
  793.  
  794.    u_surface_default_template(&surf_tmpl, stimg.texture);
  795.    surf_tmpl.u.tex.level = stimg.level;
  796.    surf_tmpl.u.tex.first_layer = stimg.layer;
  797.    surf_tmpl.u.tex.last_layer = stimg.layer;
  798.    ps = st->pipe->create_surface(st->pipe, stimg.texture, &surf_tmpl);
  799.    pipe_resource_reference(&stimg.texture, NULL);
  800.  
  801.    return ps;
  802. }
  803.  
  804. /**
  805.  * Re-validate the framebuffers.
  806.  */
  807. void
  808. st_manager_validate_framebuffers(struct st_context *st)
  809. {
  810.    struct st_framebuffer *stdraw = st_ws_framebuffer(st->ctx->DrawBuffer);
  811.    struct st_framebuffer *stread = st_ws_framebuffer(st->ctx->ReadBuffer);
  812.  
  813.    if (stdraw)
  814.       st_framebuffer_validate(stdraw, st);
  815.    if (stread && stread != stdraw)
  816.       st_framebuffer_validate(stread, st);
  817.  
  818.    st_context_validate(st, stdraw, stread);
  819. }
  820.  
  821. /**
  822.  * Add a color renderbuffer on demand.
  823.  */
  824. boolean
  825. st_manager_add_color_renderbuffer(struct st_context *st,
  826.                                   struct gl_framebuffer *fb,
  827.                                   gl_buffer_index idx)
  828. {
  829.    struct st_framebuffer *stfb = st_ws_framebuffer(fb);
  830.  
  831.    /* FBO */
  832.    if (!stfb)
  833.       return FALSE;
  834.  
  835.    if (stfb->Base.Attachment[idx].Renderbuffer)
  836.       return TRUE;
  837.  
  838.    switch (idx) {
  839.    case BUFFER_FRONT_LEFT:
  840.    case BUFFER_BACK_LEFT:
  841.    case BUFFER_FRONT_RIGHT:
  842.    case BUFFER_BACK_RIGHT:
  843.       break;
  844.    default:
  845.       return FALSE;
  846.       break;
  847.    }
  848.  
  849.    if (!st_framebuffer_add_renderbuffer(stfb, idx))
  850.       return FALSE;
  851.  
  852.    st_framebuffer_update_attachments(stfb);
  853.  
  854.    /*
  855.     * Force a call to the state tracker manager to validate the
  856.     * new renderbuffer. It might be that there is a window system
  857.     * renderbuffer available.
  858.     */
  859.    if(stfb->iface)
  860.       stfb->iface_stamp = p_atomic_read(&stfb->iface->stamp) - 1;
  861.  
  862.    st_invalidate_state(st->ctx, _NEW_BUFFERS);
  863.  
  864.    return TRUE;
  865. }
  866.  
  867. static const struct st_api st_gl_api = {
  868.    "Mesa " PACKAGE_VERSION,
  869.    ST_API_OPENGL,
  870.    ST_PROFILE_DEFAULT_MASK |
  871.    ST_PROFILE_OPENGL_CORE_MASK |
  872.    ST_PROFILE_OPENGL_ES1_MASK |
  873.    ST_PROFILE_OPENGL_ES2_MASK |
  874.    0,
  875.    ST_API_FEATURE_MS_VISUALS_MASK,
  876.    st_api_destroy,
  877.    st_api_get_proc_address,
  878.    st_api_create_context,
  879.    st_api_make_current,
  880.    st_api_get_current,
  881. };
  882.  
  883. struct st_api *
  884. st_gl_api_create(void)
  885. {
  886.    return (struct st_api *) &st_gl_api;
  887. }
  888.