src/gallium/drivers/llvmpipe/lp_screen.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   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 TUNGSTEN GRAPHICS 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 <llvm-c/Transforms/Scalar.h>
  30
  31 #include "util/u_memory.h"
  32 #include "util/u_simple_screen.h"
  33 #include "pipe/internal/p_winsys_screen.h"
  34 #include "pipe/p_defines.h"
  35 #include "pipe/p_screen.h"
  36
  37 #include "lp_texture.h"
  38 #include "lp_winsys.h"
  39 #include "lp_screen.h"
  40
  41
  42 static const char *
  43 llvmpipe_get_vendor(struct pipe_screen *screen)
  44 {
  45    return "Tungsten Graphics, Inc.";
  46 }
  47
  48
  49 static const char *
  50 llvmpipe_get_name(struct pipe_screen *screen)
  51 {
  52    return "llvmpipe";
  53 }
  54
  55
  56 static int
  57 llvmpipe_get_param(struct pipe_screen *screen, int param)
  58 {
  59    switch (param) {
  60    case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
  61       return PIPE_MAX_SAMPLERS;
  62    case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
  63       return PIPE_MAX_SAMPLERS;
  64    case PIPE_CAP_NPOT_TEXTURES:
  65       return 1;
  66    case PIPE_CAP_TWO_SIDED_STENCIL:
  67       return 1;
  68    case PIPE_CAP_GLSL:
  69       return 1;
  70    case PIPE_CAP_S3TC:
  71       return 0;
  72    case PIPE_CAP_ANISOTROPIC_FILTER:
  73       return 0;
  74    case PIPE_CAP_POINT_SPRITE:
  75       return 1;
  76    case PIPE_CAP_MAX_RENDER_TARGETS:
  77       return PIPE_MAX_COLOR_BUFS;
  78    case PIPE_CAP_OCCLUSION_QUERY:
  79       return 1;
  80    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
  81       return 1;
  82    case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
  83       return 1;
  84    case PIPE_CAP_TEXTURE_SHADOW_MAP:
  85       return 1;
  86    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
  87       return 13; /* max 4Kx4K */
  88    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
  89       return 8;  /* max 128x128x128 */
  90    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
  91       return 13; /* max 4Kx4K */
  92    case PIPE_CAP_TGSI_CONT_SUPPORTED:
  93       return 1;
  94    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
  95       return 1;
  96    default:
  97       return 0;
  98    }
  99 }
 100
 101
 102 static float
 103 llvmpipe_get_paramf(struct pipe_screen *screen, int param)
 104 {
 105    switch (param) {
 106    case PIPE_CAP_MAX_LINE_WIDTH:
 107       /* fall-through */
 108    case PIPE_CAP_MAX_LINE_WIDTH_AA:
 109       return 255.0; /* arbitrary */
 110    case PIPE_CAP_MAX_POINT_WIDTH:
 111       /* fall-through */
 112    case PIPE_CAP_MAX_POINT_WIDTH_AA:
 113       return 255.0; /* arbitrary */
 114    case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 115       return 16.0; /* not actually signficant at this time */
 116    case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 117       return 16.0; /* arbitrary */
 118    default:
 119       return 0;
 120    }
 121 }
 122
 123
 124 /**
 125  * Query format support for creating a texture, drawing surface, etc.
 126  * \param format  the format to test
 127  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
 128  */
 129 static boolean
 130 llvmpipe_is_format_supported( struct pipe_screen *screen,
 131                               enum pipe_format format,
 132                               enum pipe_texture_target target,
 133                               unsigned tex_usage,
 134                               unsigned geom_flags )
 135 {
 136    assert(target == PIPE_TEXTURE_1D ||
 137           target == PIPE_TEXTURE_2D ||
 138           target == PIPE_TEXTURE_3D ||
 139           target == PIPE_TEXTURE_CUBE);
 140
 141    switch(format) {
 142    case PIPE_FORMAT_DXT1_RGB:
 143    case PIPE_FORMAT_DXT1_RGBA:
 144    case PIPE_FORMAT_DXT3_RGBA:
 145    case PIPE_FORMAT_DXT5_RGBA:
 146       return FALSE;
 147    default:
 148       return TRUE;
 149    }
 150 }
 151
 152
 153 static void
 154 llvmpipe_destroy_screen( struct pipe_screen *_screen )
 155 {
 156    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 157
 158    struct pipe_winsys *winsys = _screen->winsys;
 159
 160    if(screen->engine)
 161       LLVMDisposeExecutionEngine(screen->engine);
 162
 163    if(screen->pass)
 164       LLVMDisposePassManager(screen->pass);
 165
 166    if(winsys->destroy)
 167       winsys->destroy(winsys);
 168
 169    FREE(screen);
 170 }
 171
 172
 173
 174 /**
 175  * Create a new pipe_screen object
 176  * Note: we're not presently subclassing pipe_screen (no llvmpipe_screen).
 177  */
 178 struct pipe_screen *
 179 llvmpipe_create_screen(struct pipe_winsys *winsys)
 180 {
 181    struct llvmpipe_screen *screen = CALLOC_STRUCT(llvmpipe_screen);
 182    char *error = NULL;
 183
 184    if (!screen)
 185       return NULL;
 186
 187    screen->base.winsys = winsys;
 188
 189    screen->base.destroy = llvmpipe_destroy_screen;
 190
 191    screen->base.get_name = llvmpipe_get_name;
 192    screen->base.get_vendor = llvmpipe_get_vendor;
 193    screen->base.get_param = llvmpipe_get_param;
 194    screen->base.get_paramf = llvmpipe_get_paramf;
 195    screen->base.is_format_supported = llvmpipe_is_format_supported;
 196
 197    llvmpipe_init_screen_texture_funcs(&screen->base);
 198    u_simple_screen_init(&screen->base);
 199
 200    screen->module = LLVMModuleCreateWithName("llvmpipe");
 201
 202    screen->provider = LLVMCreateModuleProviderForExistingModule(screen->module);
 203
 204    if (LLVMCreateJITCompiler(&screen->engine, screen->provider, 1, &error)) {
 205       fprintf(stderr, "%s\n", error);
 206       LLVMDisposeMessage(error);
 207       abort();
 208    }
 209
 210    screen->pass = LLVMCreateFunctionPassManager(screen->provider);
 211    LLVMAddTargetData(LLVMGetExecutionEngineTargetData(screen->engine), screen->pass);
 212    /* These are the passes currently listed in llvm-c/Transforms/Scalar.h,
 213     * but there are more on SVN. */
 214    LLVMAddConstantPropagationPass(screen->pass);
 215    LLVMAddInstructionCombiningPass(screen->pass);
 216    LLVMAddPromoteMemoryToRegisterPass(screen->pass);
 217    LLVMAddGVNPass(screen->pass);
 218    LLVMAddCFGSimplificationPass(screen->pass);
 219
 220    return &screen->base;
 221 }