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/**********************************************************

 * Copyright 2008-2009 VMware, Inc.  All rights reserved.

 *

 * Permission is hereby granted, free of charge, to any person

 * obtaining a copy of this software and associated documentation

 * files (the "Software"), to deal in the Software without

 * restriction, including without limitation the rights to use, copy,

 * modify, merge, publish, distribute, sublicense, and/or sell copies

 * of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be

 * included in all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN

 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

 * SOFTWARE.

 *

 **********************************************************/

#include "util/u_memory.h"

#include "util/u_inlines.h"

#include "util/u_string.h"

#include "util/u_math.h"

#include "svga_winsys.h"

#include "svga_public.h"

#include "svga_context.h"

#include "svga_format.h"

#include "svga_screen.h"

#include "svga_resource_texture.h"

#include "svga_resource.h"

#include "svga_debug.h"

#include "svga3d_shaderdefs.h"

#ifdef DEBUG

int SVGA_DEBUG = 0;

static const struct debug_named_value svga_debug_flags[] = {

   { "dma",      DEBUG_DMA, NULL },

   { "tgsi",     DEBUG_TGSI, NULL },

   { "pipe",     DEBUG_PIPE, NULL },

   { "state",    DEBUG_STATE, NULL },

   { "screen",   DEBUG_SCREEN, NULL },

   { "tex",      DEBUG_TEX, NULL },

   { "swtnl",    DEBUG_SWTNL, NULL },

   { "const",    DEBUG_CONSTS, NULL },

   { "viewport", DEBUG_VIEWPORT, NULL },

   { "views",    DEBUG_VIEWS, NULL },

   { "perf",     DEBUG_PERF, NULL },

   { "flush",    DEBUG_FLUSH, NULL },

   { "sync",     DEBUG_SYNC, NULL },

   { "cache",    DEBUG_CACHE, NULL },

   DEBUG_NAMED_VALUE_END

};

#endif

static const char *

svga_get_vendor( struct pipe_screen *pscreen )

{

   return "VMware, Inc.";

}

static const char *

svga_get_name( struct pipe_screen *pscreen )

{

   const char *build = "", *llvm = "", *mutex = "";

   static char name[100];

#ifdef DEBUG

   /* Only return internal details in the DEBUG version:

    */

   build = "build: DEBUG;";

   mutex = "mutex: " PIPE_ATOMIC ";";

#ifdef HAVE_LLVM

   llvm = "LLVM;";

#endif

#else

   build = "build: RELEASE;";

#endif

   util_snprintf(name, sizeof(name), "SVGA3D; %s %s %s", build, mutex, llvm);

   return name;

}

static float

svga_get_paramf(struct pipe_screen *screen, enum pipe_capf param)

{

   struct svga_screen *svgascreen = svga_screen(screen);

   struct svga_winsys_screen *sws = svgascreen->sws;

   SVGA3dDevCapResult result;

   switch (param) {

   case PIPE_CAPF_MAX_LINE_WIDTH:

      /* fall-through */

   case PIPE_CAPF_MAX_LINE_WIDTH_AA:

      return 7.0;

   case PIPE_CAPF_MAX_POINT_WIDTH:

      /* fall-through */

   case PIPE_CAPF_MAX_POINT_WIDTH_AA:

      return svgascreen->maxPointSize;

   case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:

      if(!sws->get_cap(sws, SVGA3D_DEVCAP_MAX_TEXTURE_ANISOTROPY, &result))

         return 4.0f;

      return (float) result.u;

   case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:

      return 15.0;

   case PIPE_CAPF_GUARD_BAND_LEFT:

   case PIPE_CAPF_GUARD_BAND_TOP:

   case PIPE_CAPF_GUARD_BAND_RIGHT:

   case PIPE_CAPF_GUARD_BAND_BOTTOM:

      return 0.0;

   }

   debug_printf("Unexpected PIPE_CAPF_ query %u\n", param);

   return 0;

}

static int

svga_get_param(struct pipe_screen *screen, enum pipe_cap param)

{

   struct svga_screen *svgascreen = svga_screen(screen);

   struct svga_winsys_screen *sws = svgascreen->sws;

   SVGA3dDevCapResult result;

   switch (param) {

   case PIPE_CAP_MAX_COMBINED_SAMPLERS:

      return 16;

   case PIPE_CAP_NPOT_TEXTURES:

      return 1;

   case PIPE_CAP_TWO_SIDED_STENCIL:

      return 1;

   case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:

      return 0;

   case PIPE_CAP_ANISOTROPIC_FILTER:

      return 1;

   case PIPE_CAP_POINT_SPRITE:

      return 1;

   case PIPE_CAP_TGSI_TEXCOORD:

      return 0;

   case PIPE_CAP_MAX_RENDER_TARGETS:

      if(!sws->get_cap(sws, SVGA3D_DEVCAP_MAX_RENDER_TARGETS, &result))

         return 1;

      if(!result.u)

         return 1;

      return MIN2(result.u, PIPE_MAX_COLOR_BUFS);

   case PIPE_CAP_OCCLUSION_QUERY:

      return 1;

   case PIPE_CAP_QUERY_TIME_ELAPSED:

      return 0;

   case PIPE_CAP_TEXTURE_SHADOW_MAP:

      return 1;

   case PIPE_CAP_TEXTURE_SWIZZLE:

      return 1;

   case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:

      return 0;

   case PIPE_CAP_USER_VERTEX_BUFFERS:

   case PIPE_CAP_USER_INDEX_BUFFERS:

      return 0;

   case PIPE_CAP_USER_CONSTANT_BUFFERS:

      return 1;

   case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:

      return 16;

   case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:

      {

         unsigned levels = SVGA_MAX_TEXTURE_LEVELS;

         if (sws->get_cap(sws, SVGA3D_DEVCAP_MAX_TEXTURE_WIDTH, &result))

            levels = MIN2(util_logbase2(result.u) + 1, levels);

         else

            levels = 12 /* 2048x2048 */;

         if (sws->get_cap(sws, SVGA3D_DEVCAP_MAX_TEXTURE_HEIGHT, &result))

            levels = MIN2(util_logbase2(result.u) + 1, levels);

         else

            levels = 12 /* 2048x2048 */;

         return levels;

      }

   case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:

      if (!sws->get_cap(sws, SVGA3D_DEVCAP_MAX_VOLUME_EXTENT, &result))

         return 8;  /* max 128x128x128 */

      return MIN2(util_logbase2(result.u) + 1, SVGA_MAX_TEXTURE_LEVELS);

   case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:

      /*

       * No mechanism to query the host, and at least limited to 2048x2048 on

       * certain hardware.

       */

      return MIN2(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS),

                  12 /* 2048x2048 */);

   case PIPE_CAP_BLEND_EQUATION_SEPARATE: /* req. for GL 1.5 */

      return 1;

   case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:

   case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:

      return 1;

   case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:

   case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:

      return 0;

   case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:

      return 1; /* The color outputs of vertex shaders are not clamped */

   case PIPE_CAP_VERTEX_COLOR_CLAMPED:

      return 0; /* The driver can't clamp vertex colors */

   case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:

      return 0; /* The driver can't clamp fragment colors */

   case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:

      return 1; /* expected for GL_ARB_framebuffer_object */

   case PIPE_CAP_GLSL_FEATURE_LEVEL:

      return 120;

   case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:

      return 1;

   /* Unsupported features */

   case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:

   case PIPE_CAP_TEXTURE_MIRROR_CLAMP:

   case PIPE_CAP_SM3:

   case PIPE_CAP_SHADER_STENCIL_EXPORT:

   case PIPE_CAP_DEPTH_CLIP_DISABLE:

   case PIPE_CAP_SEAMLESS_CUBE_MAP:

   case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:

   case PIPE_CAP_INDEP_BLEND_ENABLE:

   case PIPE_CAP_INDEP_BLEND_FUNC:

   case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:

   case PIPE_CAP_PRIMITIVE_RESTART:

   case PIPE_CAP_TGSI_INSTANCEID:

   case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:

   case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:

   case PIPE_CAP_SCALED_RESOLVE:

   case PIPE_CAP_MIN_TEXEL_OFFSET:

   case PIPE_CAP_MAX_TEXEL_OFFSET:

   case PIPE_CAP_CONDITIONAL_RENDER:

   case PIPE_CAP_TEXTURE_BARRIER:

   case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:

   case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:

   case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:

   case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:

   case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:

   case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:

   case PIPE_CAP_COMPUTE:

   case PIPE_CAP_START_INSTANCE:

   case PIPE_CAP_QUERY_TIMESTAMP:

   case PIPE_CAP_TEXTURE_MULTISAMPLE:

   case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:

   case PIPE_CAP_CUBE_MAP_ARRAY:

   case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:

   case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:

   case PIPE_CAP_QUERY_PIPELINE_STATISTICS:

   case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:

      return 0;

   case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:

      return 1;

   case PIPE_CAP_MAX_VIEWPORTS:

      return 1;

   case PIPE_CAP_ENDIANNESS:

      return PIPE_ENDIAN_LITTLE;

   }

   debug_printf("Unexpected PIPE_CAP_ query %u\n", param);

   return 0;

}

static int svga_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)

{

   struct svga_screen *svgascreen = svga_screen(screen);

   struct svga_winsys_screen *sws = svgascreen->sws;

   SVGA3dDevCapResult result;

   switch (shader)

   {

   case PIPE_SHADER_FRAGMENT:

      switch (param)

      {

      case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:

      case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:

      case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:

      case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:

         return 512;

      case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:

         return SVGA3D_MAX_NESTING_LEVEL;

      case PIPE_SHADER_CAP_MAX_INPUTS:

         return 10;

      case PIPE_SHADER_CAP_MAX_CONSTS:

         return 224;

      case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:

         return 1;

      case PIPE_SHADER_CAP_MAX_TEMPS:

         if (!sws->get_cap(sws, SVGA3D_DEVCAP_MAX_FRAGMENT_SHADER_TEMPS, &result))

            return 32;

         return MIN2(result.u, SVGA3D_TEMPREG_MAX);

      case PIPE_SHADER_CAP_MAX_ADDRS:

      case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:

	 /*

	  * Although PS 3.0 has some addressing abilities it can only represent

	  * loops that can be statically determined and unrolled. Given we can

	  * only handle a subset of the cases that the state tracker already

	  * does it is better to defer loop unrolling to the state tracker.

	  */

         return 0;

      case PIPE_SHADER_CAP_MAX_PREDS:

         return 1;

      case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:

         return 1;

      case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:

         return 0;

      case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:

      case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:

      case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:

         return 0;

      case PIPE_SHADER_CAP_SUBROUTINES:

         return 0;

      case PIPE_SHADER_CAP_INTEGERS:

         return 0;

      case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:

         return 16;

      default:

         debug_printf("Unexpected vertex shader query %u\n", param);

         return 0;

      }

      break;

   case PIPE_SHADER_VERTEX:

      switch (param)

      {

      case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:

      case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:

         if (!sws->get_cap(sws, SVGA3D_DEVCAP_MAX_VERTEX_SHADER_INSTRUCTIONS, &result))

            return 512;

         return result.u;

      case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:

      case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:

         /* XXX: until we have vertex texture support */

         return 0;

      case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:

         return SVGA3D_MAX_NESTING_LEVEL;

      case PIPE_SHADER_CAP_MAX_INPUTS:

         return 16;

      case PIPE_SHADER_CAP_MAX_CONSTS:

         return 256;

      case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:

         return 1;

      case PIPE_SHADER_CAP_MAX_TEMPS:

         if (!sws->get_cap(sws, SVGA3D_DEVCAP_MAX_VERTEX_SHADER_TEMPS, &result))

            return 32;

         return MIN2(result.u, SVGA3D_TEMPREG_MAX);

      case PIPE_SHADER_CAP_MAX_ADDRS:

         return 1;

      case PIPE_SHADER_CAP_MAX_PREDS:

         return 1;

      case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:

         return 1;

      case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:

         return 0;

      case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:

      case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:

         return 1;

      case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:

         return 0;

      case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:

         return 1;

      case PIPE_SHADER_CAP_SUBROUTINES:

         return 0;

      case PIPE_SHADER_CAP_INTEGERS:

         return 0;

      case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:

         return 0;

      default:

         debug_printf("Unexpected vertex shader query %u\n", param);

         return 0;

      }

      break;

   case PIPE_SHADER_GEOMETRY:

      /* no support for geometry shaders at this time */

      return 0;

   default:

      debug_printf("Unexpected shader type (%u) query\n", shader);

      return 0;

   }

   return 0;

}

static boolean

svga_is_format_supported( struct pipe_screen *screen,

                          enum pipe_format format,

                          enum pipe_texture_target target,

                          unsigned sample_count,

                          unsigned tex_usage)

{

   struct svga_screen *ss = svga_screen(screen);

   SVGA3dSurfaceFormat svga_format;

   SVGA3dSurfaceFormatCaps caps;

   SVGA3dSurfaceFormatCaps mask;

   assert(tex_usage);

   if (sample_count > 1) {

      return FALSE;

   }

   svga_format = svga_translate_format(ss, format, tex_usage);

   if (svga_format == SVGA3D_FORMAT_INVALID) {

      return FALSE;

   }

   /*

    * Override host capabilities, so that we end up with the same

    * visuals for all virtual hardware implementations.

    */

   if (tex_usage & PIPE_BIND_DISPLAY_TARGET) {

      switch (svga_format) {

      case SVGA3D_A8R8G8B8:

      case SVGA3D_X8R8G8B8:

      case SVGA3D_R5G6B5:

         break;

      /* Often unsupported/problematic. This means we end up with the same

       * visuals for all virtual hardware implementations.

       */

      case SVGA3D_A4R4G4B4:

      case SVGA3D_A1R5G5B5:

         return FALSE;

      default:

         return FALSE;

      }

   }

   /*

    * Query the host capabilities.

    */

   svga_get_format_cap(ss, svga_format, &caps);

   mask.value = 0;

   if (tex_usage & PIPE_BIND_RENDER_TARGET) {

      mask.offscreenRenderTarget = 1;

   }

   if (tex_usage & PIPE_BIND_DEPTH_STENCIL) {

      mask.zStencil = 1;

   }

   if (tex_usage & PIPE_BIND_SAMPLER_VIEW) {

      mask.texture = 1;

   }

   return (caps.value & mask.value) == mask.value;

}

static void

svga_fence_reference(struct pipe_screen *screen,

                     struct pipe_fence_handle **ptr,

                     struct pipe_fence_handle *fence)

{

   struct svga_winsys_screen *sws = svga_screen(screen)->sws;

   sws->fence_reference(sws, ptr, fence);

}

static boolean

svga_fence_signalled(struct pipe_screen *screen,

                     struct pipe_fence_handle *fence)

{

   struct svga_winsys_screen *sws = svga_screen(screen)->sws;

   return sws->fence_signalled(sws, fence, 0) == 0;

}

static boolean

svga_fence_finish(struct pipe_screen *screen,

                  struct pipe_fence_handle *fence,

                  uint64_t timeout)

{

   struct svga_winsys_screen *sws = svga_screen(screen)->sws;

   SVGA_DBG(DEBUG_DMA|DEBUG_PERF, "%s fence_ptr %p\n",

            __FUNCTION__, fence);

   return sws->fence_finish(sws, fence, 0) == 0;

}

static int

svga_get_driver_query_info(struct pipe_screen *screen,

                           unsigned index,

                           struct pipe_driver_query_info *info)

{

   static const struct pipe_driver_query_info queries[] = {

      {"draw-calls", SVGA_QUERY_DRAW_CALLS, 0, FALSE},

      {"fallbacks", SVGA_QUERY_FALLBACKS, 0, FALSE},

      {"memory-used", SVGA_QUERY_MEMORY_USED, 0, TRUE}

   };

   if (!info)

      return Elements(queries);

   if (index >= Elements(queries))

      return 0;

   *info = queries[index];

   return 1;

}

static void

svga_destroy_screen( struct pipe_screen *screen )

{

   struct svga_screen *svgascreen = svga_screen(screen);

   svga_screen_cache_cleanup(svgascreen);

   pipe_mutex_destroy(svgascreen->swc_mutex);

   pipe_mutex_destroy(svgascreen->tex_mutex);

   svgascreen->sws->destroy(svgascreen->sws);

   FREE(svgascreen);

}

/**

 * Create a new svga_screen object

 */

struct pipe_screen *

svga_screen_create(struct svga_winsys_screen *sws)

{

   struct svga_screen *svgascreen;

   struct pipe_screen *screen;

   SVGA3dDevCapResult result;

   boolean use_vs30, use_ps30;

#ifdef DEBUG

   SVGA_DEBUG = debug_get_flags_option("SVGA_DEBUG", svga_debug_flags, 0 );

#endif

   svgascreen = CALLOC_STRUCT(svga_screen);

   if (!svgascreen)

      goto error1;

   svgascreen->debug.force_level_surface_view =

      debug_get_bool_option("SVGA_FORCE_LEVEL_SURFACE_VIEW", FALSE);

   svgascreen->debug.force_surface_view =

      debug_get_bool_option("SVGA_FORCE_SURFACE_VIEW", FALSE);

   svgascreen->debug.force_sampler_view =

      debug_get_bool_option("SVGA_FORCE_SAMPLER_VIEW", FALSE);

   svgascreen->debug.no_surface_view =

      debug_get_bool_option("SVGA_NO_SURFACE_VIEW", FALSE);

   svgascreen->debug.no_sampler_view =

      debug_get_bool_option("SVGA_NO_SAMPLER_VIEW", FALSE);

   screen = &svgascreen->screen;

   screen->destroy = svga_destroy_screen;

   screen->get_name = svga_get_name;

   screen->get_vendor = svga_get_vendor;

   screen->get_param = svga_get_param;

   screen->get_shader_param = svga_get_shader_param;

   screen->get_paramf = svga_get_paramf;

   screen->is_format_supported = svga_is_format_supported;

   screen->context_create = svga_context_create;

   screen->fence_reference = svga_fence_reference;

   screen->fence_signalled = svga_fence_signalled;

   screen->fence_finish = svga_fence_finish;

   screen->get_driver_query_info = svga_get_driver_query_info;

   svgascreen->sws = sws;

   svga_init_screen_resource_functions(svgascreen);

   if (sws->get_hw_version) {

      svgascreen->hw_version = sws->get_hw_version(sws);

   } else {

      svgascreen->hw_version = SVGA3D_HWVERSION_WS65_B1;

   }

   use_ps30 =

      sws->get_cap(sws, SVGA3D_DEVCAP_FRAGMENT_SHADER_VERSION, &result) &&

      result.u >= SVGA3DPSVERSION_30 ? TRUE : FALSE;

   use_vs30 =

      sws->get_cap(sws, SVGA3D_DEVCAP_VERTEX_SHADER_VERSION, &result) &&

      result.u >= SVGA3DVSVERSION_30 ? TRUE : FALSE;

   /* we require Shader model 3.0 or later */

   if (!use_ps30 || !use_vs30)

      goto error2;

   /*

    * The D16, D24X8, and D24S8 formats always do an implicit shadow compare

    * when sampled from, where as the DF16, DF24, and D24S8_INT do not.  So

    * we prefer the later when available.

    *

    * This mimics hardware vendors extensions for D3D depth sampling. See also

    * http://aras-p.info/texts/D3D9GPUHacks.html

    */

   {

      boolean has_df16, has_df24, has_d24s8_int;

      SVGA3dSurfaceFormatCaps caps;

      SVGA3dSurfaceFormatCaps mask;

      mask.value = 0;

      mask.zStencil = 1;

      mask.texture = 1;

      svgascreen->depth.z16 = SVGA3D_Z_D16;

      svgascreen->depth.x8z24 = SVGA3D_Z_D24X8;

      svgascreen->depth.s8z24 = SVGA3D_Z_D24S8;

      svga_get_format_cap(svgascreen, SVGA3D_Z_DF16, &caps);

      has_df16 = (caps.value & mask.value) == mask.value;

      svga_get_format_cap(svgascreen, SVGA3D_Z_DF24, &caps);

      has_df24 = (caps.value & mask.value) == mask.value;

      svga_get_format_cap(svgascreen, SVGA3D_Z_D24S8_INT, &caps);

      has_d24s8_int = (caps.value & mask.value) == mask.value;

      /* XXX: We might want some other logic here.

       * Like if we only have d24s8_int we should

       * emulate the other formats with that.

       */

      if (has_df16) {

         svgascreen->depth.z16 = SVGA3D_Z_DF16;

      }

      if (has_df24) {

         svgascreen->depth.x8z24 = SVGA3D_Z_DF24;

      }

      if (has_d24s8_int) {

         svgascreen->depth.s8z24 = SVGA3D_Z_D24S8_INT;

      }

   }

   if (!sws->get_cap(sws, SVGA3D_DEVCAP_MAX_POINT_SIZE, &result)) {

      svgascreen->maxPointSize = 1.0F;

   } else {

      /* Keep this to a reasonable size to avoid failures in

       * conform/pntaa.c:

       */

      svgascreen->maxPointSize = MIN2(result.f, 80.0f);

   }

   pipe_mutex_init(svgascreen->tex_mutex);

   pipe_mutex_init(svgascreen->swc_mutex);

   svga_screen_cache_init(svgascreen);

   return screen;

error2:

   FREE(svgascreen);

error1:

   return NULL;

}

struct svga_winsys_screen *

svga_winsys_screen(struct pipe_screen *screen)

{

   return svga_screen(screen)->sws;

}

#ifdef DEBUG

struct svga_screen *

svga_screen(struct pipe_screen *screen)

{

   assert(screen);

   assert(screen->destroy == svga_destroy_screen);

   return (struct svga_screen *)screen;

}

#endif