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 #include "pipe/p_screen.h"
  36
  37 #include "st_context.h"
  38 #include "st_extensions.h"
  39
  40
  41 static int min(int a, int b)
  42 {
  43    return (a < b) ? a : b;
  44 }
  45
  46 static int max(int a, int b)
  47 {
  48    return (a > b) ? a : b;
  49 }
  50
  51 static int clamp(int a, int min, int max)
  52 {
  53    if (a < min)
  54       return min;
  55    else if (a > max)
  56       return max;
  57    else
  58       return a;
  59 }
  60
  61
  62 /**
  63  * Query driver to get implementation limits.
  64  * Note that we have to limit/clamp against Mesa's internal limits too.
  65  */
  66 void st_init_limits(struct st_context *st)
  67 {
  68    struct pipe_screen *screen = st->pipe->screen;
  69    struct gl_constants *c = &st->ctx->Const;
  70
  71    c->MaxTextureLevels
  72       = min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_2D_LEVELS),
  73             MAX_TEXTURE_LEVELS);
  74
  75    c->Max3DTextureLevels
  76       = min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_3D_LEVELS),
  77             MAX_3D_TEXTURE_LEVELS);
  78
  79    c->MaxCubeTextureLevels
  80       = min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS),
  81             MAX_CUBE_TEXTURE_LEVELS);
  82
  83    c->MaxTextureRectSize
  84       = min(1 << (c->MaxTextureLevels - 1), MAX_TEXTURE_RECT_SIZE);
  85
  86    c->MaxTextureImageUnits
  87       = c->MaxTextureCoordUnits
  88       = min(screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS),
  89             MAX_TEXTURE_IMAGE_UNITS);
  90
  91    c->MaxDrawBuffers
  92       = clamp(screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS),
  93               1, MAX_DRAW_BUFFERS);
  94
  95    c->MaxLineWidth
  96       = max(1.0, screen->get_paramf(screen, PIPE_CAP_MAX_LINE_WIDTH));
  97    c->MaxLineWidthAA
  98       = max(1.0, screen->get_paramf(screen, PIPE_CAP_MAX_LINE_WIDTH_AA));
  99
 100    c->MaxPointSize
 101       = max(1.0, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH));
 102    c->MaxPointSizeAA
 103       = max(1.0, screen->get_paramf(screen, PIPE_CAP_MAX_POINT_WIDTH_AA));
 104
 105    c->MaxTextureMaxAnisotropy
 106       = max(2.0, screen->get_paramf(screen, PIPE_CAP_MAX_TEXTURE_ANISOTROPY));
 107
 108    c->MaxTextureLodBias
 109       = screen->get_paramf(screen, PIPE_CAP_MAX_TEXTURE_LOD_BIAS);
 110
 111    st->bitmap_texcoord_bias
 112       = screen->get_paramf(screen, PIPE_CAP_BITMAP_TEXCOORD_BIAS);
 113 }
 114
 115
 116 /**
 117  * XXX this needs careful review
 118  */
 119 void st_init_extensions(struct st_context *st)
 120 {
 121    struct pipe_screen *screen = st->pipe->screen;
 122    GLcontext *ctx = st->ctx;
 123
 124    /*
 125     * Extensions that are supported by all Gallium drivers:
 126     */
 127    ctx->Extensions.ARB_multisample = GL_TRUE; /* API support */
 128    ctx->Extensions.ARB_fragment_program = GL_TRUE;
 129    ctx->Extensions.ARB_texture_border_clamp = GL_TRUE; /* XXX temp */
 130    ctx->Extensions.ARB_texture_compression = GL_TRUE; /* API support only */
 131    ctx->Extensions.ARB_texture_cube_map = GL_TRUE;
 132    ctx->Extensions.ARB_texture_env_combine = GL_TRUE;
 133    ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE;
 134    ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE;
 135    ctx->Extensions.ARB_texture_mirrored_repeat = GL_TRUE; /* XXX temp */
 136
 137    ctx->Extensions.ARB_vertex_program = GL_TRUE;
 138    ctx->Extensions.ARB_vertex_buffer_object = GL_TRUE;
 139
 140    ctx->Extensions.EXT_blend_color = GL_TRUE;
 141    ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
 142    ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
 143    ctx->Extensions.EXT_blend_logic_op = GL_TRUE;
 144    ctx->Extensions.EXT_blend_minmax = GL_TRUE;
 145    ctx->Extensions.EXT_blend_subtract = GL_TRUE;
 146    ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
 147    ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
 148    ctx->Extensions.EXT_fog_coord = GL_TRUE;
 149    ctx->Extensions.EXT_multi_draw_arrays = GL_TRUE;
 150    ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
 151    ctx->Extensions.EXT_point_parameters = GL_TRUE;
 152    ctx->Extensions.EXT_secondary_color = GL_TRUE;
 153    ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
 154    ctx->Extensions.EXT_texture_env_add = GL_TRUE;
 155    ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
 156    ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
 157    ctx->Extensions.EXT_texture_lod_bias = GL_TRUE;
 158
 159    ctx->Extensions.NV_blend_square = GL_TRUE;
 160    ctx->Extensions.NV_texgen_reflection = GL_TRUE;
 161
 162    ctx->Extensions.SGIS_generate_mipmap = GL_TRUE; /* XXX temp */
 163
 164    /*
 165     * Extensions that depend on the driver/hardware:
 166     */
 167    if (screen->get_param(screen, PIPE_CAP_MAX_RENDER_TARGETS) > 0) {
 168       ctx->Extensions.ARB_draw_buffers = GL_TRUE;
 169    }
 170
 171    if (screen->get_param(screen, PIPE_CAP_GLSL)) {
 172       ctx->Extensions.ARB_fragment_shader = GL_TRUE;
 173       ctx->Extensions.ARB_vertex_shader = GL_TRUE;
 174       ctx->Extensions.ARB_shader_objects = GL_TRUE;
 175       ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
 176       ctx->Extensions.ARB_shading_language_120 = GL_TRUE;
 177    }
 178
 179    if (screen->get_param(screen, PIPE_CAP_NPOT_TEXTURES)) {
 180       ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE;
 181       ctx->Extensions.NV_texture_rectangle = GL_TRUE;
 182    }
 183
 184    if (screen->get_param(screen, PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS) > 1) {
 185       ctx->Extensions.ARB_multitexture = GL_TRUE;
 186    }
 187
 188    if (screen->get_param(screen, PIPE_CAP_TWO_SIDED_STENCIL)) {
 189       ctx->Extensions.ATI_separate_stencil = GL_TRUE;
 190    }
 191
 192    if (screen->get_param(screen, PIPE_CAP_ANISOTROPIC_FILTER)) {
 193       ctx->Extensions.EXT_texture_filter_anisotropic = GL_TRUE;
 194    }
 195
 196    if (screen->get_param(screen, PIPE_CAP_POINT_SPRITE)) {
 197       ctx->Extensions.ARB_point_sprite = GL_TRUE;
 198       ctx->Extensions.NV_point_sprite = GL_TRUE;
 199    }
 200
 201    if (screen->get_param(screen, PIPE_CAP_OCCLUSION_QUERY)) {
 202       ctx->Extensions.ARB_occlusion_query = GL_TRUE;
 203    }
 204
 205    if (screen->get_param(screen, PIPE_CAP_TEXTURE_SHADOW_MAP)) {
 206       ctx->Extensions.ARB_depth_texture = GL_TRUE;
 207       ctx->Extensions.ARB_shadow = GL_TRUE;
 208       ctx->Extensions.EXT_shadow_funcs = GL_TRUE;
 209       /*ctx->Extensions.ARB_shadow_ambient = GL_TRUE;*/
 210    }
 211
 212    if (screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_SRGB,
 213                                    PIPE_TEXTURE)) {
 214       ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
 215    }
 216
 217    if (screen->is_format_supported(screen, PIPE_FORMAT_DXT5_RGBA,
 218                                    PIPE_TEXTURE)) {
 219       ctx->Extensions.EXT_texture_compression_s3tc = GL_TRUE;
 220    }
 221
 222 }