src/mesa/state_tracker/st_extensions.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 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 #include "main/imports.h"
  29 #include "main/context.h"
  30 #include "main/extensions.h"
  31 #include "main/macros.h"
  32
  33 #include "pipe/p_context.h"
  34 #include "pipe/p_defines.h"
  35
  36 #include "st_context.h"
  37 #include "st_extensions.h"
  38
  39
  40 static int min(int a, int b)
  41 {
  42    return (a < b) ? a : b;
  43 }
  44
  45 static int max(int a, int b)
  46 {
  47    return (a > b) ? a : b;
  48 }
  49
  50 static int clamp(int a, int min, int max)
  51 {
  52    if (a < min)
  53       return min;
  54    else if (a > max)
  55       return max;
  56    else
  57       return a;
  58 }
  59
  60
  61 /**
  62  * Query driver to get implementation limits.
  63  * Note that we have to limit/clamp against Mesa's internal limits too.
  64  */
  65 void st_init_limits(struct st_context *st)
  66 {
  67    struct pipe_context *pipe = st->pipe;
  68    struct gl_constants *c = &st->ctx->Const;
  69
  70    c->MaxTextureLevels
  71       = min(pipe->get_param(pipe, PIPE_CAP_MAX_TEXTURE_2D_LEVELS),
  72             MAX_TEXTURE_LEVELS);
  73
  74    c->Max3DTextureLevels
  75       = min(pipe->get_param(pipe, PIPE_CAP_MAX_TEXTURE_3D_LEVELS),
  76             MAX_3D_TEXTURE_LEVELS);
  77
  78    c->MaxCubeTextureLevels
  79       = min(pipe->get_param(pipe, PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS),
  80             MAX_CUBE_TEXTURE_LEVELS);
  81
  82    c->MaxTextureRectSize
  83       = min(1 << (c->MaxTextureLevels - 1), MAX_TEXTURE_RECT_SIZE);
  84
  85    c->MaxTextureImageUnits
  86       = c->MaxTextureCoordUnits
  87       = min(pipe->get_param(pipe, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS),
  88             MAX_TEXTURE_IMAGE_UNITS);
  89
  90    c->MaxDrawBuffers
  91       = clamp(pipe->get_param(pipe, PIPE_CAP_MAX_RENDER_TARGETS),
  92               1, MAX_DRAW_BUFFERS);
  93
  94    c->MaxLineWidth
  95       = max(1.0, pipe->get_paramf(pipe, PIPE_CAP_MAX_LINE_WIDTH));
  96    c->MaxLineWidthAA
  97       = max(1.0, pipe->get_paramf(pipe, PIPE_CAP_MAX_LINE_WIDTH_AA));
  98
  99    c->MaxPointSize
 100       = max(1.0, pipe->get_paramf(pipe, PIPE_CAP_MAX_POINT_WIDTH));
 101    c->MaxPointSizeAA
 102       = max(1.0, pipe->get_paramf(pipe, PIPE_CAP_MAX_POINT_WIDTH_AA));
 103
 104    c->MaxTextureMaxAnisotropy
 105       = max(2.0, pipe->get_paramf(pipe, PIPE_CAP_MAX_TEXTURE_ANISOTROPY));
 106
 107    c->MaxTextureLodBias
 108       = pipe->get_paramf(pipe, PIPE_CAP_MAX_TEXTURE_LOD_BIAS);
 109 }
 110
 111
 112 /**
 113  * XXX this needs careful review
 114  */
 115 void st_init_extensions(struct st_context *st)
 116 {
 117    struct pipe_context *pipe = st->pipe;
 118    GLcontext *ctx = st->ctx;
 119
 120    /*
 121     * Extensions that are supported by all Gallium drivers:
 122     */
 123    ctx->Extensions.ARB_multisample = GL_TRUE; /* API support */
 124    ctx->Extensions.ARB_fragment_program = GL_TRUE;
 125    ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
 126    ctx->Extensions.ARB_texture_compression = GL_TRUE; /* API support only */
 127    ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
 128    ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
 129    ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
 130    ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
 131    ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE; /* XXX temp */
 132
 133    ctx->Extensions.ARB_vertex_program = GL_TRUE;
 134    ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;
 135
 136    ctx->Extensions.EXT_blend_color = GL_TRUE;
 137    ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
 138    ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
 139    ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
 140    ctx->Extensions.EXT_blend_minmax = GL_TRUE;
 141    ctx->Extensions.EXT_blend_subtract = GL_TRUE;
 142    ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
 143    ctx->Extensions.EXT_fog_coord = GL_TRUE;
 144    ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;
 145    ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
 146    ctx->Extensions.EXT_point_parameters = GL_TRUE;
 147    ctx->Extensions.EXT_secondary_color = GL_TRUE;
 148    ctx->Extensions.EXT_shadow_funcs = GL_TRUE; /* XXX temp */
 149    ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
 150    ctx->Extensions.EXT_texture_env_add = GL_TRUE;
 151    ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
 152    ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
 153    ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
 154    ctx->Extensions.EXT_texture_sRGB = GL_TRUE; /* XXX temp */
 155
 156    ctx->Extensions.NV_blend_square = GL_TRUE;
 157    ctx->Extensions.NV_texgen_reflection = GL_TRUE;
 158
 159    ctx->Extensions.SGIS_generate_mipmap = GL_TRUE; /* XXX temp */
 160
 161    /*
 162     * Extensions that depend on the driver/hardware:
 163     */
 164    if (pipe->get_param(pipe, PIPE_CAP_MAX_RENDER_TARGETS) > 0) {
 165       ctx->Extensions.ARB_draw_buffers = GL_TRUE;
 166    }
 167
 168    if (pipe->get_param(pipe, PIPE_CAP_GLSL)) {
 169       ctx->Extensions.ARB_fragment_shader = GL_TRUE;
 170       ctx->Extensions.ARB_vertex_shader = GL_TRUE;
 171       ctx->Extensions.ARB_shader_objects = GL_TRUE;
 172       ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
 173       ctx->Extensions.ARB_shading_language_120 = GL_TRUE;
 174    }
 175
 176    if (pipe->get_param(pipe, PIPE_CAP_NPOT_TEXTURES)) {
 177       ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
 178       ctx->Extensions.NV_texture_rectangle = GL_TRUE;
 179    }
 180
 181    if (pipe->get_param(pipe, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS) > 1) {
 182       ctx->Extensions.ARB_multitexture = GL_TRUE;
 183    }
 184
 185    if (pipe->get_param(pipe, PIPE_CAP_TWO_SIDED_STENCIL)) {
 186       ctx->Extensions.ATI_separate_stencil = GL_TRUE;
 187    }
 188
 189    if (pipe->get_param(pipe, PIPE_CAP_S3TC)) {
 190       ctx->Extensions.EXT_texture_compression_s3tc = GL_TRUE;
 191    }
 192
 193    if (pipe->get_param(pipe, PIPE_CAP_ANISOTROPIC_FILTER)) {
 194       ctx->Extensions.EXT_texture_filter_anisotropic = GL_TRUE;
 195    }
 196
 197    if (pipe->get_param(pipe, PIPE_CAP_POINT_SPRITE)) {
 198       ctx->Extensions.ARB_point_sprite = GL_TRUE;
 199       ctx->Extensions.NV_point_sprite = GL_TRUE;
 200    }
 201
 202    if (pipe->get_param(pipe, PIPE_CAP_OCCLUSION_QUERY)) {
 203       ctx->Extensions.ARB_occlusion_query = GL_TRUE;
 204    }
 205
 206    if (pipe->get_param(pipe, PIPE_CAP_TEXTURE_SHADOW_MAP)) {
 207       ctx->Extensions.ARB_depth_texture = GL_TRUE;
 208       ctx->Extensions.ARB_shadow = GL_TRUE;
 209       /*ctx->Extensions.ARB_shadow_ambient = GL_TRUE;*/
 210    }
 211
 212 }