0,0 → 1,519 |
/* |
* Mesa 3-D graphics library |
* |
* Copyright (C) 2010 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 <stdio.h> |
#include "imports.h" |
#include "mtypes.h" |
#include "version.h" |
#include "git_sha1.h" |
|
/** |
* Scans 'string' to see if it ends with 'ending'. |
*/ |
static bool |
check_for_ending(const char *string, const char *ending) |
{ |
const size_t len1 = strlen(string); |
const size_t len2 = strlen(ending); |
|
if (len2 > len1) |
return false; |
|
return strcmp(string + (len1 - len2), ending) == 0; |
} |
|
/** |
* Returns the gl override data |
* |
* version > 0 indicates there is an override requested |
* fwd_context is only valid if version > 0 |
*/ |
static void |
get_gl_override(int *version, bool *fwd_context, bool *compat_context) |
{ |
const char *env_var = "MESA_GL_VERSION_OVERRIDE"; |
const char *version_str; |
int major, minor, n; |
static int override_version = -1; |
static bool fc_suffix = false; |
static bool compat_suffix = false; |
|
if (override_version < 0) { |
override_version = 0; |
|
version_str = getenv(env_var); |
if (version_str) { |
fc_suffix = check_for_ending(version_str, "FC"); |
compat_suffix = check_for_ending(version_str, "COMPAT"); |
|
n = sscanf(version_str, "%u.%u", &major, &minor); |
if (n != 2) { |
fprintf(stderr, "error: invalid value for %s: %s\n", |
env_var, version_str); |
override_version = 0; |
} else { |
override_version = major * 10 + minor; |
if (override_version < 30 && fc_suffix) { |
fprintf(stderr, "error: invalid value for %s: %s\n", |
env_var, version_str); |
} |
} |
} |
} |
|
*version = override_version; |
*fwd_context = fc_suffix; |
*compat_context = compat_suffix; |
} |
|
/** |
* Builds the MESA version string. |
*/ |
static void |
create_version_string(struct gl_context *ctx, const char *prefix) |
{ |
static const int max = 100; |
|
ctx->VersionString = malloc(max); |
if (ctx->VersionString) { |
_mesa_snprintf(ctx->VersionString, max, |
"%s%u.%u%s Mesa " PACKAGE_VERSION |
#ifdef MESA_GIT_SHA1 |
" (" MESA_GIT_SHA1 ")" |
#endif |
, |
prefix, |
ctx->Version / 10, ctx->Version % 10, |
(ctx->API == API_OPENGL_CORE) ? " (Core Profile)" : "" |
); |
} |
} |
|
/** |
* Override the context's version and/or API type if the |
* environment variable MESA_GL_VERSION_OVERRIDE is set. |
* |
* Example uses of MESA_GL_VERSION_OVERRIDE: |
* |
* 2.1: select a compatibility (non-Core) profile with GL version 2.1 |
* 3.0: select a compatibility (non-Core) profile with GL version 3.0 |
* 3.0FC: select a Core+Forward Compatible profile with GL version 3.0 |
* 3.1: select a Core profile with GL version 3.1 |
* 3.1FC: select a Core+Forward Compatible profile with GL version 3.1 |
*/ |
bool |
_mesa_override_gl_version_contextless(struct gl_constants *consts, |
gl_api *apiOut, GLuint *versionOut) |
{ |
int version; |
bool fwd_context, compat_context; |
|
get_gl_override(&version, &fwd_context, &compat_context); |
|
if (version > 0) { |
*versionOut = version; |
if (version >= 30 && fwd_context) { |
*apiOut = API_OPENGL_CORE; |
consts->ContextFlags |= GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT; |
} else if (version >= 31 && !compat_context) { |
*apiOut = API_OPENGL_CORE; |
} else { |
*apiOut = API_OPENGL_COMPAT; |
} |
return true; |
} |
return false; |
} |
|
void |
_mesa_override_gl_version(struct gl_context *ctx) |
{ |
if (_mesa_override_gl_version_contextless(&ctx->Const, &ctx->API, |
&ctx->Version)) { |
create_version_string(ctx, ""); |
} |
} |
|
/** |
* Returns the gl override value |
* |
* version > 0 indicates there is an override requested |
*/ |
int |
_mesa_get_gl_version_override(void) |
{ |
int version; |
bool fwd_context, compat_context; |
|
get_gl_override(&version, &fwd_context, &compat_context); |
|
return version; |
} |
|
/** |
* Override the context's GLSL version if the environment variable |
* MESA_GLSL_VERSION_OVERRIDE is set. Valid values for |
* MESA_GLSL_VERSION_OVERRIDE are integers, such as "130". |
*/ |
void |
_mesa_override_glsl_version(struct gl_constants *consts) |
{ |
const char *env_var = "MESA_GLSL_VERSION_OVERRIDE"; |
const char *version; |
int n; |
|
version = getenv(env_var); |
if (!version) { |
return; |
} |
|
n = sscanf(version, "%u", &consts->GLSLVersion); |
if (n != 1) { |
fprintf(stderr, "error: invalid value for %s: %s\n", env_var, version); |
return; |
} |
} |
|
/** |
* Examine enabled GL extensions to determine GL version. |
*/ |
static GLuint |
compute_version(const struct gl_extensions *extensions, |
const struct gl_constants *consts, gl_api api) |
{ |
GLuint major, minor, version; |
|
const bool ver_1_3 = (extensions->ARB_texture_border_clamp && |
extensions->ARB_texture_cube_map && |
extensions->ARB_texture_env_combine && |
extensions->ARB_texture_env_dot3); |
const bool ver_1_4 = (ver_1_3 && |
extensions->ARB_depth_texture && |
extensions->ARB_shadow && |
extensions->ARB_texture_env_crossbar && |
extensions->EXT_blend_color && |
extensions->EXT_blend_func_separate && |
extensions->EXT_blend_minmax && |
extensions->EXT_point_parameters); |
const bool ver_1_5 = (ver_1_4 && |
extensions->ARB_occlusion_query); |
const bool ver_2_0 = (ver_1_5 && |
extensions->ARB_point_sprite && |
extensions->ARB_vertex_shader && |
extensions->ARB_fragment_shader && |
extensions->ARB_texture_non_power_of_two && |
extensions->EXT_blend_equation_separate && |
|
/* Technically, 2.0 requires the functionality of the |
* EXT version. Enable 2.0 if either extension is |
* available, and assume that a driver that only |
* exposes the ATI extension will fallback to |
* software when necessary. |
*/ |
(extensions->EXT_stencil_two_side |
|| extensions->ATI_separate_stencil)); |
const bool ver_2_1 = (ver_2_0 && |
extensions->EXT_pixel_buffer_object && |
extensions->EXT_texture_sRGB); |
const bool ver_3_0 = (ver_2_1 && |
consts->GLSLVersion >= 130 && |
(consts->MaxSamples >= 4 || consts->FakeSWMSAA) && |
(api == API_OPENGL_CORE || |
extensions->ARB_color_buffer_float) && |
extensions->ARB_depth_buffer_float && |
extensions->ARB_half_float_vertex && |
extensions->ARB_map_buffer_range && |
extensions->ARB_shader_texture_lod && |
extensions->ARB_texture_float && |
extensions->ARB_texture_rg && |
extensions->ARB_texture_compression_rgtc && |
extensions->EXT_draw_buffers2 && |
extensions->ARB_framebuffer_object && |
extensions->EXT_framebuffer_sRGB && |
extensions->EXT_packed_float && |
extensions->EXT_texture_array && |
extensions->EXT_texture_shared_exponent && |
extensions->EXT_transform_feedback && |
extensions->NV_conditional_render); |
const bool ver_3_1 = (ver_3_0 && |
consts->GLSLVersion >= 140 && |
extensions->ARB_draw_instanced && |
extensions->ARB_texture_buffer_object && |
extensions->ARB_uniform_buffer_object && |
extensions->EXT_texture_snorm && |
extensions->NV_primitive_restart && |
extensions->NV_texture_rectangle && |
consts->Program[MESA_SHADER_VERTEX].MaxTextureImageUnits >= 16); |
const bool ver_3_2 = (ver_3_1 && |
consts->GLSLVersion >= 150 && |
extensions->ARB_depth_clamp && |
extensions->ARB_draw_elements_base_vertex && |
extensions->ARB_fragment_coord_conventions && |
extensions->EXT_provoking_vertex && |
extensions->ARB_seamless_cube_map && |
extensions->ARB_sync && |
extensions->ARB_texture_multisample && |
extensions->EXT_vertex_array_bgra); |
const bool ver_3_3 = (ver_3_2 && |
consts->GLSLVersion >= 330 && |
extensions->ARB_blend_func_extended && |
extensions->ARB_explicit_attrib_location && |
extensions->ARB_instanced_arrays && |
extensions->ARB_occlusion_query2 && |
extensions->ARB_shader_bit_encoding && |
extensions->ARB_texture_rgb10_a2ui && |
extensions->ARB_timer_query && |
extensions->ARB_vertex_type_2_10_10_10_rev && |
extensions->EXT_texture_swizzle); |
/* ARB_sampler_objects is always enabled in mesa */ |
|
const bool ver_4_0 = (ver_3_3 && |
consts->GLSLVersion >= 400 && |
extensions->ARB_draw_buffers_blend && |
extensions->ARB_draw_indirect && |
extensions->ARB_gpu_shader5 && |
extensions->ARB_gpu_shader_fp64 && |
extensions->ARB_sample_shading && |
false /*extensions->ARB_shader_subroutine*/ && |
extensions->ARB_tessellation_shader && |
extensions->ARB_texture_buffer_object_rgb32 && |
extensions->ARB_texture_cube_map_array && |
extensions->ARB_texture_query_lod && |
extensions->ARB_transform_feedback2 && |
extensions->ARB_transform_feedback3); |
const bool ver_4_1 = (ver_4_0 && |
consts->GLSLVersion >= 410 && |
extensions->ARB_ES2_compatibility && |
extensions->ARB_shader_precision && |
extensions->ARB_vertex_attrib_64bit && |
extensions->ARB_viewport_array); |
const bool ver_4_2 = (ver_4_1 && |
consts->GLSLVersion >= 420 && |
extensions->ARB_base_instance && |
extensions->ARB_conservative_depth && |
extensions->ARB_internalformat_query && |
extensions->ARB_shader_atomic_counters && |
extensions->ARB_shader_image_load_store && |
extensions->ARB_shading_language_420pack && |
extensions->ARB_shading_language_packing && |
extensions->ARB_texture_compression_bptc && |
extensions->ARB_transform_feedback_instanced); |
|
if (ver_4_2) { |
major = 4; |
minor = 2; |
} |
else if (ver_4_1) { |
major = 4; |
minor = 1; |
} |
else if (ver_4_0) { |
major = 4; |
minor = 0; |
} |
else if (ver_3_3) { |
major = 3; |
minor = 3; |
} |
else if (ver_3_2) { |
major = 3; |
minor = 2; |
} |
else if (ver_3_1) { |
major = 3; |
minor = 1; |
} |
else if (ver_3_0) { |
major = 3; |
minor = 0; |
} |
else if (ver_2_1) { |
major = 2; |
minor = 1; |
} |
else if (ver_2_0) { |
major = 2; |
minor = 0; |
} |
else if (ver_1_5) { |
major = 1; |
minor = 5; |
} |
else if (ver_1_4) { |
major = 1; |
minor = 4; |
} |
else if (ver_1_3) { |
major = 1; |
minor = 3; |
} |
else { |
major = 1; |
minor = 2; |
} |
|
version = major * 10 + minor; |
|
if (api == API_OPENGL_CORE && version < 31) |
return 0; |
|
return version; |
} |
|
static GLuint |
compute_version_es1(const struct gl_extensions *extensions) |
{ |
/* OpenGL ES 1.0 is derived from OpenGL 1.3 */ |
const bool ver_1_0 = (extensions->ARB_texture_env_combine && |
extensions->ARB_texture_env_dot3); |
/* OpenGL ES 1.1 is derived from OpenGL 1.5 */ |
const bool ver_1_1 = (ver_1_0 && |
extensions->EXT_point_parameters); |
|
if (ver_1_1) { |
return 11; |
} else if (ver_1_0) { |
return 10; |
} else { |
return 0; |
} |
} |
|
static GLuint |
compute_version_es2(const struct gl_extensions *extensions) |
{ |
/* OpenGL ES 2.0 is derived from OpenGL 2.0 */ |
const bool ver_2_0 = (extensions->ARB_texture_cube_map && |
extensions->EXT_blend_color && |
extensions->EXT_blend_func_separate && |
extensions->EXT_blend_minmax && |
extensions->ARB_vertex_shader && |
extensions->ARB_fragment_shader && |
extensions->ARB_texture_non_power_of_two && |
extensions->EXT_blend_equation_separate); |
/* FINISHME: This list isn't quite right. */ |
const bool ver_3_0 = (extensions->ARB_half_float_vertex && |
extensions->ARB_internalformat_query && |
extensions->ARB_map_buffer_range && |
extensions->ARB_shader_texture_lod && |
extensions->ARB_texture_float && |
extensions->ARB_texture_rg && |
extensions->ARB_depth_buffer_float && |
extensions->EXT_draw_buffers2 && |
/* extensions->ARB_framebuffer_object && */ |
extensions->EXT_framebuffer_sRGB && |
extensions->EXT_packed_float && |
extensions->EXT_texture_array && |
extensions->EXT_texture_shared_exponent && |
extensions->EXT_transform_feedback && |
extensions->ARB_draw_instanced && |
extensions->ARB_uniform_buffer_object && |
extensions->EXT_texture_snorm && |
extensions->NV_primitive_restart && |
extensions->OES_depth_texture_cube_map); |
if (ver_3_0) { |
return 30; |
} else if (ver_2_0) { |
return 20; |
} else { |
return 0; |
} |
} |
|
GLuint |
_mesa_get_version(const struct gl_extensions *extensions, |
struct gl_constants *consts, gl_api api) |
{ |
switch (api) { |
case API_OPENGL_COMPAT: |
/* Disable GLSL 1.40 and later for legacy contexts. |
* This disallows creation of the GL 3.1 compatibility context. */ |
if (consts->GLSLVersion > 130) { |
consts->GLSLVersion = 130; |
} |
/* fall through */ |
case API_OPENGL_CORE: |
return compute_version(extensions, consts, api); |
case API_OPENGLES: |
return compute_version_es1(extensions); |
case API_OPENGLES2: |
return compute_version_es2(extensions); |
} |
return 0; |
} |
|
/** |
* Set the context's Version and VersionString fields. |
* This should only be called once as part of context initialization |
* or to perform version check for GLX_ARB_create_context_profile. |
*/ |
void |
_mesa_compute_version(struct gl_context *ctx) |
{ |
if (ctx->Version) |
return; |
|
ctx->Version = _mesa_get_version(&ctx->Extensions, &ctx->Const, ctx->API); |
|
/* Make sure that the GLSL version lines up with the GL version. In some |
* cases it can be too high, e.g. if an extension is missing. |
*/ |
if (ctx->API == API_OPENGL_CORE) { |
switch (ctx->Version) { |
case 31: |
ctx->Const.GLSLVersion = 140; |
break; |
case 32: |
ctx->Const.GLSLVersion = 150; |
break; |
default: |
ctx->Const.GLSLVersion = ctx->Version * 10; |
break; |
} |
} |
|
switch (ctx->API) { |
case API_OPENGL_COMPAT: |
case API_OPENGL_CORE: |
create_version_string(ctx, ""); |
break; |
|
case API_OPENGLES: |
if (!ctx->Version) { |
_mesa_problem(ctx, "Incomplete OpenGL ES 1.0 support."); |
return; |
} |
create_version_string(ctx, "OpenGL ES-CM "); |
break; |
|
case API_OPENGLES2: |
if (!ctx->Version) { |
_mesa_problem(ctx, "Incomplete OpenGL ES 2.0 support."); |
return; |
} |
create_version_string(ctx, "OpenGL ES "); |
break; |
} |
} |