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author | marha <marha@users.sourceforge.net> | 2012-12-10 08:55:36 +0100 |
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committer | marha <marha@users.sourceforge.net> | 2012-12-10 08:55:36 +0100 |
commit | a0124a5e8e70979d2c24ef55285da989fdad766a (patch) | |
tree | 5cea5c9804a8edf67bc7260e0851a20d21324547 /mesalib/src/glsl/glsl_parser_extras.cpp | |
parent | 514b4afb64ccbf8e954270105ed5064272a2be68 (diff) | |
parent | 0328076efb5ff6e62152c09e38d0d11f7931d07b (diff) | |
download | vcxsrv-a0124a5e8e70979d2c24ef55285da989fdad766a.tar.gz vcxsrv-a0124a5e8e70979d2c24ef55285da989fdad766a.tar.bz2 vcxsrv-a0124a5e8e70979d2c24ef55285da989fdad766a.zip |
Merge remote-tracking branch 'origin/released'
* origin/released:
fontconfig libX11 mesa pixman git update 10 dec 2012
Conflicts:
fontconfig/src/fcxml.c
Diffstat (limited to 'mesalib/src/glsl/glsl_parser_extras.cpp')
-rw-r--r-- | mesalib/src/glsl/glsl_parser_extras.cpp | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/mesalib/src/glsl/glsl_parser_extras.cpp b/mesalib/src/glsl/glsl_parser_extras.cpp index f1fdd3a47..d36089226 100644 --- a/mesalib/src/glsl/glsl_parser_extras.cpp +++ b/mesalib/src/glsl/glsl_parser_extras.cpp @@ -37,6 +37,16 @@ extern "C" { #include "ir_optimization.h" #include "loop_analysis.h" +/** + * Format a short human-readable description of the given GLSL version. + */ +const char * +glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version) +{ + return ralloc_asprintf(mem_ctx, "GLSL%s %d.%02d", is_es ? " ES" : "", + version / 100, version % 100); +} + _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx, GLenum target, void *mem_ctx) : ctx(_ctx) @@ -82,6 +92,8 @@ _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx, this->Const.MaxCombinedTextureImageUnits = ctx->Const.MaxCombinedTextureImageUnits; this->Const.MaxTextureImageUnits = ctx->Const.MaxTextureImageUnits; this->Const.MaxFragmentUniformComponents = ctx->Const.FragmentProgram.MaxUniformComponents; + this->Const.MinProgramTexelOffset = ctx->Const.MinProgramTexelOffset; + this->Const.MaxProgramTexelOffset = ctx->Const.MaxProgramTexelOffset; this->Const.MaxDrawBuffers = ctx->Const.MaxDrawBuffers; @@ -113,6 +125,166 @@ _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx, this->default_uniform_qualifier->flags.q.column_major = 1; } +/** + * Determine whether the current GLSL version is sufficiently high to support + * a certain feature, and generate an error message if it isn't. + * + * \param required_glsl_version and \c required_glsl_es_version are + * interpreted as they are in _mesa_glsl_parse_state::is_version(). + * + * \param locp is the parser location where the error should be reported. + * + * \param fmt (and additional arguments) constitute a printf-style error + * message to report if the version check fails. Information about the + * current and required GLSL versions will be appended. So, for example, if + * the GLSL version being compiled is 1.20, and check_version(130, 300, locp, + * "foo unsupported") is called, the error message will be "foo unsupported in + * GLSL 1.20 (GLSL 1.30 or GLSL 3.00 ES required)". + */ +bool +_mesa_glsl_parse_state::check_version(unsigned required_glsl_version, + unsigned required_glsl_es_version, + YYLTYPE *locp, const char *fmt, ...) +{ + if (this->is_version(required_glsl_version, required_glsl_es_version)) + return true; + + va_list args; + va_start(args, fmt); + char *problem = ralloc_vasprintf(ctx, fmt, args); + va_end(args); + const char *glsl_version_string + = glsl_compute_version_string(ctx, false, required_glsl_version); + const char *glsl_es_version_string + = glsl_compute_version_string(ctx, true, required_glsl_es_version); + const char *requirement_string = ""; + if (required_glsl_version && required_glsl_es_version) { + requirement_string = ralloc_asprintf(ctx, " (%s or %s required)", + glsl_version_string, + glsl_es_version_string); + } else if (required_glsl_version) { + requirement_string = ralloc_asprintf(ctx, " (%s required)", + glsl_version_string); + } else if (required_glsl_es_version) { + requirement_string = ralloc_asprintf(ctx, " (%s required)", + glsl_es_version_string); + } + _mesa_glsl_error(locp, this, "%s in %s%s.", + problem, this->get_version_string(), + requirement_string); + + return false; +} + +/** + * Process a GLSL #version directive. + * + * \param version is the integer that follows the #version token. + * + * \param ident is a string identifier that follows the integer, if any is + * present. Otherwise NULL. + */ +void +_mesa_glsl_parse_state::process_version_directive(YYLTYPE *locp, int version, + const char *ident) +{ + bool es_token_present = false; + if (ident) { + if (strcmp(ident, "es") == 0) { + es_token_present = true; + } else { + _mesa_glsl_error(locp, this, + "Illegal text following version number\n"); + } + } + + bool supported = false; + + if (es_token_present) { + this->es_shader = true; + switch (version) { + case 100: + _mesa_glsl_error(locp, this, + "GLSL 1.00 ES should be selected using " + "`#version 100'\n"); + supported = this->ctx->API == API_OPENGLES2 || + this->ctx->Extensions.ARB_ES2_compatibility; + break; + case 300: + supported = _mesa_is_gles3(this->ctx) || + this->ctx->Extensions.ARB_ES3_compatibility; + break; + default: + supported = false; + break; + } + } else { + switch (version) { + case 100: + this->es_shader = true; + supported = this->ctx->API == API_OPENGLES2 || + this->ctx->Extensions.ARB_ES2_compatibility; + break; + case 110: + case 120: + /* FINISHME: Once the OpenGL 3.0 'forward compatible' context or + * the OpenGL 3.2 Core context is supported, this logic will need + * change. Older versions of GLSL are no longer supported + * outside the compatibility contexts of 3.x. + */ + case 130: + case 140: + case 150: + case 330: + case 400: + case 410: + case 420: + supported = _mesa_is_desktop_gl(this->ctx) && + ((unsigned) version) <= this->ctx->Const.GLSLVersion; + break; + default: + supported = false; + break; + } + } + + this->language_version = version; + + if (!supported) { + _mesa_glsl_error(locp, this, "%s is not supported. " + "Supported versions are: %s\n", + this->get_version_string(), + this->supported_version_string); + + /* On exit, the language_version must be set to a valid value. + * Later calls to _mesa_glsl_initialize_types will misbehave if + * the version is invalid. + */ + switch (this->ctx->API) { + case API_OPENGL_COMPAT: + case API_OPENGL_CORE: + this->language_version = this->ctx->Const.GLSLVersion; + break; + + case API_OPENGLES: + assert(!"Should not get here."); + /* FALLTHROUGH */ + + case API_OPENGLES2: + this->language_version = 100; + break; + } + } + + if (this->language_version >= 140) { + this->ARB_uniform_buffer_object_enable = true; + } + + if (this->language_version == 300 && this->es_shader) { + this->ARB_explicit_attrib_location_enable = true; + } +} + const char * _mesa_glsl_shader_target_name(enum _mesa_glsl_parser_targets target) { |