* \author Ian Romanick <ian.d.romanick@intel.com>
*/
+#include "main/context.h"
#include "main/core.h"
-#include "glsl_symbol_table.h"
-#include "ir.h"
-#include "shaderobj.h"
+#include "main/enums.h"
+#include "main/shaderapi.h"
+#include "main/shaderobj.h"
+#include "main/uniforms.h"
+#include "compiler/glsl/glsl_symbol_table.h"
+#include "compiler/glsl/ir.h"
+#include "compiler/glsl/program.h"
#include "program/hash_table.h"
-#include "../glsl/program.h"
+#include "util/strndup.h"
-extern "C" {
-#include "shaderapi.h"
+
+static GLint
+program_resource_location(struct gl_shader_program *shProg,
+ struct gl_program_resource *res, const char *name,
+ unsigned array_index);
+
+/**
+ * Declare convenience functions to return resource data in a given type.
+ * Warning! this is not type safe so be *very* careful when using these.
+ */
+#define DECL_RESOURCE_FUNC(name, type) \
+const type * RESOURCE_ ## name (gl_program_resource *res) { \
+ assert(res->Data); \
+ return (type *) res->Data; \
}
+DECL_RESOURCE_FUNC(VAR, gl_shader_variable);
+DECL_RESOURCE_FUNC(UBO, gl_uniform_block);
+DECL_RESOURCE_FUNC(UNI, gl_uniform_storage);
+DECL_RESOURCE_FUNC(ATC, gl_active_atomic_buffer);
+DECL_RESOURCE_FUNC(XFB, gl_transform_feedback_varying_info);
+DECL_RESOURCE_FUNC(SUB, gl_subroutine_function);
+
void GLAPIENTRY
-_mesa_BindAttribLocation(GLhandleARB program, GLuint index,
- const GLcharARB *name)
+_mesa_BindAttribLocation(GLuint program, GLuint index,
+ const GLchar *name)
{
GET_CURRENT_CONTEXT(ctx);
return;
}
- if (index >= ctx->Const.VertexProgram.MaxAttribs) {
+ if (index >= ctx->Const.Program[MESA_SHADER_VERTEX].MaxAttribs) {
_mesa_error(ctx, GL_INVALID_VALUE, "glBindAttribLocation(index)");
return;
}
*/
}
+static bool
+is_active_attrib(const gl_shader_variable *var)
+{
+ if (!var)
+ return false;
+
+ switch (var->mode) {
+ case ir_var_shader_in:
+ return var->location != -1;
+
+ case ir_var_system_value:
+ /* From GL 4.3 core spec, section 11.1.1 (Vertex Attributes):
+ * "For GetActiveAttrib, all active vertex shader input variables
+ * are enumerated, including the special built-in inputs gl_VertexID
+ * and gl_InstanceID."
+ */
+ return var->location == SYSTEM_VALUE_VERTEX_ID ||
+ var->location == SYSTEM_VALUE_VERTEX_ID_ZERO_BASE ||
+ var->location == SYSTEM_VALUE_INSTANCE_ID;
+
+ default:
+ return false;
+ }
+}
+
void GLAPIENTRY
-_mesa_GetActiveAttrib(GLhandleARB program, GLuint desired_index,
- GLsizei maxLength, GLsizei * length, GLint * size,
- GLenum * type, GLcharARB * name)
+_mesa_GetActiveAttrib(GLuint program, GLuint desired_index,
+ GLsizei maxLength, GLsizei * length, GLint * size,
+ GLenum * type, GLchar * name)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_shader_program *shProg;
+ if (maxLength < 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE, "glGetActiveAttrib(maxLength < 0)");
+ return;
+ }
+
shProg = _mesa_lookup_shader_program_err(ctx, program, "glGetActiveAttrib");
if (!shProg)
return;
return;
}
- exec_list *const ir = shProg->_LinkedShaders[MESA_SHADER_VERTEX]->ir;
- unsigned current_index = 0;
+ struct gl_program_resource *res =
+ _mesa_program_resource_find_index(shProg, GL_PROGRAM_INPUT,
+ desired_index);
- foreach_list(node, ir) {
- const ir_variable *const var = ((ir_instruction *) node)->as_variable();
+ /* User asked for index that does not exist. */
+ if (!res) {
+ _mesa_error(ctx, GL_INVALID_VALUE, "glGetActiveAttrib(index)");
+ return;
+ }
- if (var == NULL
- || var->data.mode != ir_var_shader_in
- || var->location == -1)
- continue;
+ const gl_shader_variable *const var = RESOURCE_VAR(res);
- if (current_index == desired_index) {
- _mesa_copy_string(name, maxLength, length, var->name);
+ if (!is_active_attrib(var))
+ return;
- if (size)
- *size = (var->type->is_array()) ? var->type->length : 1;
+ const char *var_name = var->name;
- if (type)
- *type = var->type->gl_type;
+ /* Since gl_VertexID may be lowered to gl_VertexIDMESA, we need to
+ * consider gl_VertexIDMESA as gl_VertexID for purposes of checking
+ * active attributes.
+ */
+ if (var->mode == ir_var_system_value &&
+ var->location == SYSTEM_VALUE_VERTEX_ID_ZERO_BASE) {
+ var_name = "gl_VertexID";
+ }
- return;
- }
+ _mesa_copy_string(name, maxLength, length, var_name);
- current_index++;
- }
+ if (size)
+ _mesa_program_resource_prop(shProg, res, desired_index, GL_ARRAY_SIZE,
+ size, "glGetActiveAttrib");
- /* If the loop did not return early, the caller must have asked for
- * an index that did not exit. Set an error.
- */
- _mesa_error(ctx, GL_INVALID_VALUE, "glGetActiveAttrib(index)");
+ if (type)
+ _mesa_program_resource_prop(shProg, res, desired_index, GL_TYPE,
+ (GLint *) type, "glGetActiveAttrib");
}
GLint GLAPIENTRY
-_mesa_GetAttribLocation(GLhandleARB program, const GLcharARB * name)
+_mesa_GetAttribLocation(GLuint program, const GLchar * name)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_shader_program *const shProg =
if (shProg->_LinkedShaders[MESA_SHADER_VERTEX] == NULL)
return -1;
- exec_list *ir = shProg->_LinkedShaders[MESA_SHADER_VERTEX]->ir;
- foreach_list(node, ir) {
- const ir_variable *const var = ((ir_instruction *) node)->as_variable();
+ unsigned array_index = 0;
+ struct gl_program_resource *res =
+ _mesa_program_resource_find_name(shProg, GL_PROGRAM_INPUT, name,
+ &array_index);
- /* The extra check against VERT_ATTRIB_GENERIC0 is because
- * glGetAttribLocation cannot be used on "conventional" attributes.
- *
- * From page 95 of the OpenGL 3.0 spec:
- *
- * "If name is not an active attribute, if name is a conventional
- * attribute, or if an error occurs, -1 will be returned."
- */
- if (var == NULL
- || var->data.mode != ir_var_shader_in
- || var->location == -1
- || var->location < VERT_ATTRIB_GENERIC0)
- continue;
-
- if (strcmp(var->name, name) == 0)
- return var->location - VERT_ATTRIB_GENERIC0;
- }
+ if (!res)
+ return -1;
- return -1;
+ GLint loc = program_resource_location(shProg, res, name, array_index);
+
+ /* The extra check against against 0 is made because of builtin-attribute
+ * locations that have offset applied. Function program_resource_location
+ * can return built-in attribute locations < 0 and glGetAttribLocation
+ * cannot be used on "conventional" attributes.
+ *
+ * From page 95 of the OpenGL 3.0 spec:
+ *
+ * "If name is not an active attribute, if name is a conventional
+ * attribute, or if an error occurs, -1 will be returned."
+ */
+ return (loc >= 0) ? loc : -1;
}
-
unsigned
_mesa_count_active_attribs(struct gl_shader_program *shProg)
{
return 0;
}
- exec_list *const ir = shProg->_LinkedShaders[MESA_SHADER_VERTEX]->ir;
- unsigned i = 0;
-
- foreach_list(node, ir) {
- const ir_variable *const var = ((ir_instruction *) node)->as_variable();
-
- if (var == NULL
- || var->data.mode != ir_var_shader_in
- || var->location == -1)
- continue;
-
- i++;
+ struct gl_program_resource *res = shProg->ProgramResourceList;
+ unsigned count = 0;
+ for (unsigned j = 0; j < shProg->NumProgramResourceList; j++, res++) {
+ if (res->Type == GL_PROGRAM_INPUT &&
+ res->StageReferences & (1 << MESA_SHADER_VERTEX) &&
+ is_active_attrib(RESOURCE_VAR(res)))
+ count++;
}
-
- return i;
+ return count;
}
return 0;
}
- exec_list *const ir = shProg->_LinkedShaders[MESA_SHADER_VERTEX]->ir;
+ struct gl_program_resource *res = shProg->ProgramResourceList;
size_t longest = 0;
+ for (unsigned j = 0; j < shProg->NumProgramResourceList; j++, res++) {
+ if (res->Type == GL_PROGRAM_INPUT &&
+ res->StageReferences & (1 << MESA_SHADER_VERTEX)) {
- foreach_list(node, ir) {
- const ir_variable *const var = ((ir_instruction *) node)->as_variable();
-
- if (var == NULL
- || var->data.mode != ir_var_shader_in
- || var->location == -1)
- continue;
-
- const size_t len = strlen(var->name);
- if (len >= longest)
- longest = len + 1;
+ const size_t length = strlen(RESOURCE_VAR(res)->name);
+ if (length >= longest)
+ longest = length + 1;
+ }
}
return longest;
if (shProg->_LinkedShaders[MESA_SHADER_FRAGMENT] == NULL)
return -1;
- exec_list *ir = shProg->_LinkedShaders[MESA_SHADER_FRAGMENT]->ir;
- foreach_list(node, ir) {
- const ir_variable *const var = ((ir_instruction *) node)->as_variable();
-
- /* The extra check against FRAG_RESULT_DATA0 is because
- * glGetFragDataLocation cannot be used on "conventional" attributes.
- *
- * From page 95 of the OpenGL 3.0 spec:
- *
- * "If name is not an active attribute, if name is a conventional
- * attribute, or if an error occurs, -1 will be returned."
- */
- if (var == NULL
- || var->data.mode != ir_var_shader_out
- || var->location == -1
- || var->location < FRAG_RESULT_DATA0)
- continue;
-
- if (strcmp(var->name, name) == 0)
- return var->index;
- }
-
- return -1;
+ return _mesa_program_resource_location_index(shProg, GL_PROGRAM_OUTPUT,
+ name);
}
GLint GLAPIENTRY
if (shProg->_LinkedShaders[MESA_SHADER_FRAGMENT] == NULL)
return -1;
- exec_list *ir = shProg->_LinkedShaders[MESA_SHADER_FRAGMENT]->ir;
- foreach_list(node, ir) {
- const ir_variable *const var = ((ir_instruction *) node)->as_variable();
+ unsigned array_index = 0;
+ struct gl_program_resource *res =
+ _mesa_program_resource_find_name(shProg, GL_PROGRAM_OUTPUT, name,
+ &array_index);
+
+ if (!res)
+ return -1;
+
+ GLint loc = program_resource_location(shProg, res, name, array_index);
+
+ /* The extra check against against 0 is made because of builtin-attribute
+ * locations that have offset applied. Function program_resource_location
+ * can return built-in attribute locations < 0 and glGetFragDataLocation
+ * cannot be used on "conventional" attributes.
+ *
+ * From page 95 of the OpenGL 3.0 spec:
+ *
+ * "If name is not an active attribute, if name is a conventional
+ * attribute, or if an error occurs, -1 will be returned."
+ */
+ return (loc >= 0) ? loc : -1;
+}
+
+const char*
+_mesa_program_resource_name(struct gl_program_resource *res)
+{
+ const gl_shader_variable *var;
+ switch (res->Type) {
+ case GL_UNIFORM_BLOCK:
+ case GL_SHADER_STORAGE_BLOCK:
+ return RESOURCE_UBO(res)->Name;
+ case GL_TRANSFORM_FEEDBACK_VARYING:
+ return RESOURCE_XFB(res)->Name;
+ case GL_PROGRAM_INPUT:
+ var = RESOURCE_VAR(res);
+ /* Special case gl_VertexIDMESA -> gl_VertexID. */
+ if (var->mode == ir_var_system_value &&
+ var->location == SYSTEM_VALUE_VERTEX_ID_ZERO_BASE) {
+ return "gl_VertexID";
+ }
+ /* fallthrough */
+ case GL_PROGRAM_OUTPUT:
+ return RESOURCE_VAR(res)->name;
+ case GL_UNIFORM:
+ case GL_BUFFER_VARIABLE:
+ return RESOURCE_UNI(res)->name;
+ case GL_VERTEX_SUBROUTINE_UNIFORM:
+ case GL_GEOMETRY_SUBROUTINE_UNIFORM:
+ case GL_FRAGMENT_SUBROUTINE_UNIFORM:
+ case GL_COMPUTE_SUBROUTINE_UNIFORM:
+ case GL_TESS_CONTROL_SUBROUTINE_UNIFORM:
+ case GL_TESS_EVALUATION_SUBROUTINE_UNIFORM:
+ return RESOURCE_UNI(res)->name + MESA_SUBROUTINE_PREFIX_LEN;
+ case GL_VERTEX_SUBROUTINE:
+ case GL_GEOMETRY_SUBROUTINE:
+ case GL_FRAGMENT_SUBROUTINE:
+ case GL_COMPUTE_SUBROUTINE:
+ case GL_TESS_CONTROL_SUBROUTINE:
+ case GL_TESS_EVALUATION_SUBROUTINE:
+ return RESOURCE_SUB(res)->name;
+ default:
+ assert(!"support for resource type not implemented");
+ }
+ return NULL;
+}
+
+
+unsigned
+_mesa_program_resource_array_size(struct gl_program_resource *res)
+{
+ switch (res->Type) {
+ case GL_TRANSFORM_FEEDBACK_VARYING:
+ return RESOURCE_XFB(res)->Size > 1 ?
+ RESOURCE_XFB(res)->Size : 0;
+ case GL_PROGRAM_INPUT:
+ case GL_PROGRAM_OUTPUT:
+ return RESOURCE_VAR(res)->type->length;
+ case GL_UNIFORM:
+ case GL_VERTEX_SUBROUTINE_UNIFORM:
+ case GL_GEOMETRY_SUBROUTINE_UNIFORM:
+ case GL_FRAGMENT_SUBROUTINE_UNIFORM:
+ case GL_COMPUTE_SUBROUTINE_UNIFORM:
+ case GL_TESS_CONTROL_SUBROUTINE_UNIFORM:
+ case GL_TESS_EVALUATION_SUBROUTINE_UNIFORM:
+ return RESOURCE_UNI(res)->array_elements;
+ case GL_BUFFER_VARIABLE:
+ /* Unsized arrays */
+ if (RESOURCE_UNI(res)->array_stride > 0 &&
+ RESOURCE_UNI(res)->array_elements == 0)
+ return 1;
+ else
+ return RESOURCE_UNI(res)->array_elements;
+ case GL_VERTEX_SUBROUTINE:
+ case GL_GEOMETRY_SUBROUTINE:
+ case GL_FRAGMENT_SUBROUTINE:
+ case GL_COMPUTE_SUBROUTINE:
+ case GL_TESS_CONTROL_SUBROUTINE:
+ case GL_TESS_EVALUATION_SUBROUTINE:
+ case GL_ATOMIC_COUNTER_BUFFER:
+ case GL_UNIFORM_BLOCK:
+ case GL_SHADER_STORAGE_BLOCK:
+ return 0;
+ default:
+ assert(!"support for resource type not implemented");
+ }
+ return 0;
+}
+
+/**
+ * Checks if array subscript is valid and if so sets array_index.
+ */
+static bool
+valid_array_index(const GLchar *name, unsigned *array_index)
+{
+ long idx = 0;
+ const GLchar *out_base_name_end;
+
+ idx = parse_program_resource_name(name, &out_base_name_end);
+ if (idx < 0)
+ return false;
+
+ if (array_index)
+ *array_index = idx;
+
+ return true;
+}
+
+/* Find a program resource with specific name in given interface.
+ */
+struct gl_program_resource *
+_mesa_program_resource_find_name(struct gl_shader_program *shProg,
+ GLenum programInterface, const char *name,
+ unsigned *array_index)
+{
+ struct gl_program_resource *res = shProg->ProgramResourceList;
+ for (unsigned i = 0; i < shProg->NumProgramResourceList; i++, res++) {
+ if (res->Type != programInterface)
+ continue;
- /* The extra check against FRAG_RESULT_DATA0 is because
- * glGetFragDataLocation cannot be used on "conventional" attributes.
+ /* Resource basename. */
+ const char *rname = _mesa_program_resource_name(res);
+ unsigned baselen = strlen(rname);
+ unsigned baselen_without_array_index = baselen;
+ const char *rname_last_square_bracket = strrchr(rname, '[');
+ bool found = false;
+ bool rname_has_array_index_zero = false;
+ /* From ARB_program_interface_query spec:
+ *
+ * "uint GetProgramResourceIndex(uint program, enum programInterface,
+ * const char *name);
+ * [...]
+ * If <name> exactly matches the name string of one of the active
+ * resources for <programInterface>, the index of the matched resource is
+ * returned. Additionally, if <name> would exactly match the name string
+ * of an active resource if "[0]" were appended to <name>, the index of
+ * the matched resource is returned. [...]"
+ *
+ * "A string provided to GetProgramResourceLocation or
+ * GetProgramResourceLocationIndex is considered to match an active variable
+ * if:
+ *
+ * * the string exactly matches the name of the active variable;
*
- * From page 95 of the OpenGL 3.0 spec:
+ * * if the string identifies the base name of an active array, where the
+ * string would exactly match the name of the variable if the suffix
+ * "[0]" were appended to the string; [...]"
+ */
+ /* Remove array's index from interface block name comparison only if
+ * array's index is zero and the resulting string length is the same
+ * than the provided name's length.
+ */
+ if (rname_last_square_bracket) {
+ baselen_without_array_index -= strlen(rname_last_square_bracket);
+ rname_has_array_index_zero =
+ (strncmp(rname_last_square_bracket, "[0]\0", 4) == 0) &&
+ (baselen_without_array_index == strlen(name));
+ }
+
+ if (strncmp(rname, name, baselen) == 0)
+ found = true;
+ else if (rname_has_array_index_zero &&
+ strncmp(rname, name, baselen_without_array_index) == 0)
+ found = true;
+
+ if (found) {
+ switch (programInterface) {
+ case GL_UNIFORM_BLOCK:
+ case GL_SHADER_STORAGE_BLOCK:
+ /* Basename match, check if array or struct. */
+ if (rname_has_array_index_zero ||
+ name[baselen] == '\0' ||
+ name[baselen] == '[' ||
+ name[baselen] == '.') {
+ return res;
+ }
+ break;
+ case GL_TRANSFORM_FEEDBACK_VARYING:
+ case GL_BUFFER_VARIABLE:
+ case GL_UNIFORM:
+ case GL_VERTEX_SUBROUTINE_UNIFORM:
+ case GL_GEOMETRY_SUBROUTINE_UNIFORM:
+ case GL_FRAGMENT_SUBROUTINE_UNIFORM:
+ case GL_COMPUTE_SUBROUTINE_UNIFORM:
+ case GL_TESS_CONTROL_SUBROUTINE_UNIFORM:
+ case GL_TESS_EVALUATION_SUBROUTINE_UNIFORM:
+ case GL_VERTEX_SUBROUTINE:
+ case GL_GEOMETRY_SUBROUTINE:
+ case GL_FRAGMENT_SUBROUTINE:
+ case GL_COMPUTE_SUBROUTINE:
+ case GL_TESS_CONTROL_SUBROUTINE:
+ case GL_TESS_EVALUATION_SUBROUTINE:
+ if (name[baselen] == '.') {
+ return res;
+ }
+ /* fall-through */
+ case GL_PROGRAM_INPUT:
+ case GL_PROGRAM_OUTPUT:
+ if (name[baselen] == '\0') {
+ return res;
+ } else if (name[baselen] == '[' &&
+ valid_array_index(name, array_index)) {
+ return res;
+ }
+ break;
+ default:
+ assert(!"not implemented for given interface");
+ }
+ }
+ }
+ return NULL;
+}
+
+static GLuint
+calc_resource_index(struct gl_shader_program *shProg,
+ struct gl_program_resource *res)
+{
+ unsigned i;
+ GLuint index = 0;
+ for (i = 0; i < shProg->NumProgramResourceList; i++) {
+ if (&shProg->ProgramResourceList[i] == res)
+ return index;
+ if (shProg->ProgramResourceList[i].Type == res->Type)
+ index++;
+ }
+ return GL_INVALID_INDEX;
+}
+
+/**
+ * Calculate index for the given resource.
+ */
+GLuint
+_mesa_program_resource_index(struct gl_shader_program *shProg,
+ struct gl_program_resource *res)
+{
+ if (!res)
+ return GL_INVALID_INDEX;
+
+ switch (res->Type) {
+ case GL_ATOMIC_COUNTER_BUFFER:
+ return RESOURCE_ATC(res) - shProg->AtomicBuffers;
+ case GL_VERTEX_SUBROUTINE:
+ case GL_GEOMETRY_SUBROUTINE:
+ case GL_FRAGMENT_SUBROUTINE:
+ case GL_COMPUTE_SUBROUTINE:
+ case GL_TESS_CONTROL_SUBROUTINE:
+ case GL_TESS_EVALUATION_SUBROUTINE:
+ return RESOURCE_SUB(res)->index;
+ case GL_UNIFORM_BLOCK:
+ case GL_SHADER_STORAGE_BLOCK:
+ case GL_TRANSFORM_FEEDBACK_VARYING:
+ default:
+ return calc_resource_index(shProg, res);
+ }
+}
+
+/**
+ * Find a program resource that points to given data.
+ */
+static struct gl_program_resource*
+program_resource_find_data(struct gl_shader_program *shProg, void *data)
+{
+ struct gl_program_resource *res = shProg->ProgramResourceList;
+ for (unsigned i = 0; i < shProg->NumProgramResourceList; i++, res++) {
+ if (res->Data == data)
+ return res;
+ }
+ return NULL;
+}
+
+/* Find a program resource with specific index in given interface.
+ */
+struct gl_program_resource *
+_mesa_program_resource_find_index(struct gl_shader_program *shProg,
+ GLenum programInterface, GLuint index)
+{
+ struct gl_program_resource *res = shProg->ProgramResourceList;
+ int idx = -1;
+
+ for (unsigned i = 0; i < shProg->NumProgramResourceList; i++, res++) {
+ if (res->Type != programInterface)
+ continue;
+
+ switch (res->Type) {
+ case GL_UNIFORM_BLOCK:
+ case GL_ATOMIC_COUNTER_BUFFER:
+ case GL_SHADER_STORAGE_BLOCK:
+ if (_mesa_program_resource_index(shProg, res) == index)
+ return res;
+ break;
+ case GL_TRANSFORM_FEEDBACK_VARYING:
+ case GL_PROGRAM_INPUT:
+ case GL_PROGRAM_OUTPUT:
+ case GL_UNIFORM:
+ case GL_VERTEX_SUBROUTINE_UNIFORM:
+ case GL_GEOMETRY_SUBROUTINE_UNIFORM:
+ case GL_FRAGMENT_SUBROUTINE_UNIFORM:
+ case GL_COMPUTE_SUBROUTINE_UNIFORM:
+ case GL_TESS_CONTROL_SUBROUTINE_UNIFORM:
+ case GL_TESS_EVALUATION_SUBROUTINE_UNIFORM:
+ case GL_VERTEX_SUBROUTINE:
+ case GL_GEOMETRY_SUBROUTINE:
+ case GL_FRAGMENT_SUBROUTINE:
+ case GL_COMPUTE_SUBROUTINE:
+ case GL_TESS_CONTROL_SUBROUTINE:
+ case GL_TESS_EVALUATION_SUBROUTINE:
+ case GL_BUFFER_VARIABLE:
+ if (++idx == (int) index)
+ return res;
+ break;
+ default:
+ assert(!"not implemented for given interface");
+ }
+ }
+ return NULL;
+}
+
+/* Function returns if resource name is expected to have index
+ * appended into it.
+ *
+ *
+ * Page 61 (page 73 of the PDF) in section 2.11 of the OpenGL ES 3.0
+ * spec says:
+ *
+ * "If the active uniform is an array, the uniform name returned in
+ * name will always be the name of the uniform array appended with
+ * "[0]"."
+ *
+ * The same text also appears in the OpenGL 4.2 spec. It does not,
+ * however, appear in any previous spec. Previous specifications are
+ * ambiguous in this regard. However, either name can later be passed
+ * to glGetUniformLocation (and related APIs), so there shouldn't be any
+ * harm in always appending "[0]" to uniform array names.
+ *
+ * Geometry shader stage has different naming convention where the 'normal'
+ * condition is an array, therefore for variables referenced in geometry
+ * stage we do not add '[0]'.
+ *
+ * Note, that TCS outputs and TES inputs should not have index appended
+ * either.
+ */
+static bool
+add_index_to_name(struct gl_program_resource *res)
+{
+ bool add_index = !((res->Type == GL_PROGRAM_INPUT &&
+ res->StageReferences & (1 << MESA_SHADER_GEOMETRY |
+ 1 << MESA_SHADER_TESS_CTRL |
+ 1 << MESA_SHADER_TESS_EVAL)) ||
+ (res->Type == GL_PROGRAM_OUTPUT &&
+ res->StageReferences & 1 << MESA_SHADER_TESS_CTRL));
+
+ /* Transform feedback varyings have array index already appended
+ * in their names.
+ */
+ if (res->Type == GL_TRANSFORM_FEEDBACK_VARYING)
+ add_index = false;
+
+ return add_index;
+}
+
+/* Get name length of a program resource. This consists of
+ * base name + 3 for '[0]' if resource is an array.
+ */
+extern unsigned
+_mesa_program_resource_name_len(struct gl_program_resource *res)
+{
+ unsigned length = strlen(_mesa_program_resource_name(res));
+ if (_mesa_program_resource_array_size(res) && add_index_to_name(res))
+ length += 3;
+ return length;
+}
+
+/* Get full name of a program resource.
+ */
+bool
+_mesa_get_program_resource_name(struct gl_shader_program *shProg,
+ GLenum programInterface, GLuint index,
+ GLsizei bufSize, GLsizei *length,
+ GLchar *name, const char *caller)
+{
+ GET_CURRENT_CONTEXT(ctx);
+
+ /* Find resource with given interface and index. */
+ struct gl_program_resource *res =
+ _mesa_program_resource_find_index(shProg, programInterface, index);
+
+ /* The error INVALID_VALUE is generated if <index> is greater than
+ * or equal to the number of entries in the active resource list for
+ * <programInterface>.
+ */
+ if (!res) {
+ _mesa_error(ctx, GL_INVALID_VALUE, "%s(index %u)", caller, index);
+ return false;
+ }
+
+ if (bufSize < 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE, "%s(bufSize %d)", caller, bufSize);
+ return false;
+ }
+
+ GLsizei localLength;
+
+ if (length == NULL)
+ length = &localLength;
+
+ _mesa_copy_string(name, bufSize, length, _mesa_program_resource_name(res));
+
+ if (_mesa_program_resource_array_size(res) && add_index_to_name(res)) {
+ int i;
+
+ /* The comparison is strange because *length does *NOT* include the
+ * terminating NUL, but maxLength does.
+ */
+ for (i = 0; i < 3 && (*length + i + 1) < bufSize; i++)
+ name[*length + i] = "[0]"[i];
+
+ name[*length + i] = '\0';
+ *length += i;
+ }
+ return true;
+}
+
+static GLint
+program_resource_location(struct gl_shader_program *shProg,
+ struct gl_program_resource *res, const char *name,
+ unsigned array_index)
+{
+ /* Built-in locations should report GL_INVALID_INDEX. */
+ if (is_gl_identifier(name))
+ return GL_INVALID_INDEX;
+
+ /* VERT_ATTRIB_GENERIC0 and FRAG_RESULT_DATA0 are decremented as these
+ * offsets are used internally to differentiate between built-in attributes
+ * and user-defined attributes.
+ */
+ switch (res->Type) {
+ case GL_PROGRAM_INPUT: {
+ const gl_shader_variable *var = RESOURCE_VAR(res);
+
+ /* If the input is an array, fail if the index is out of bounds. */
+ if (array_index > 0
+ && array_index >= var->type->length) {
+ return -1;
+ }
+ return (var->location +
+ (array_index * var->type->without_array()->matrix_columns) -
+ VERT_ATTRIB_GENERIC0);
+ }
+ case GL_PROGRAM_OUTPUT:
+ /* If the output is an array, fail if the index is out of bounds. */
+ if (array_index > 0
+ && array_index >= RESOURCE_VAR(res)->type->length) {
+ return -1;
+ }
+ return RESOURCE_VAR(res)->location + array_index - FRAG_RESULT_DATA0;
+ case GL_UNIFORM:
+ /* If the uniform is built-in, fail. */
+ if (RESOURCE_UNI(res)->builtin)
+ return -1;
+
+ /* From page 79 of the OpenGL 4.2 spec:
+ *
+ * "A valid name cannot be a structure, an array of structures, or any
+ * portion of a single vector or a matrix."
+ */
+ if (RESOURCE_UNI(res)->type->without_array()->is_record())
+ return -1;
+
+ /* From the GL_ARB_uniform_buffer_object spec:
*
- * "If name is not an active attribute, if name is a conventional
- * attribute, or if an error occurs, -1 will be returned."
+ * "The value -1 will be returned if <name> does not correspond to an
+ * active uniform variable name in <program>, if <name> is associated
+ * with a named uniform block, or if <name> starts with the reserved
+ * prefix "gl_"."
*/
- if (var == NULL
- || var->data.mode != ir_var_shader_out
- || var->location == -1
- || var->location < FRAG_RESULT_DATA0)
- continue;
+ if (RESOURCE_UNI(res)->block_index != -1 ||
+ RESOURCE_UNI(res)->atomic_buffer_index != -1)
+ return -1;
+
+ /* fallthrough */
+ case GL_VERTEX_SUBROUTINE_UNIFORM:
+ case GL_GEOMETRY_SUBROUTINE_UNIFORM:
+ case GL_FRAGMENT_SUBROUTINE_UNIFORM:
+ case GL_COMPUTE_SUBROUTINE_UNIFORM:
+ case GL_TESS_CONTROL_SUBROUTINE_UNIFORM:
+ case GL_TESS_EVALUATION_SUBROUTINE_UNIFORM:
+ /* If the uniform is an array, fail if the index is out of bounds. */
+ if (array_index > 0
+ && array_index >= RESOURCE_UNI(res)->array_elements) {
+ return -1;
+ }
+
+ /* location in remap table + array element offset */
+ return RESOURCE_UNI(res)->remap_location + array_index;
+ default:
+ return -1;
+ }
+}
+
+/**
+ * Function implements following location queries:
+ * glGetUniformLocation
+ */
+GLint
+_mesa_program_resource_location(struct gl_shader_program *shProg,
+ GLenum programInterface, const char *name)
+{
+ unsigned array_index = 0;
+ struct gl_program_resource *res =
+ _mesa_program_resource_find_name(shProg, programInterface, name,
+ &array_index);
+
+ /* Resource not found. */
+ if (!res)
+ return -1;
+
+ return program_resource_location(shProg, res, name, array_index);
+}
+
+/**
+ * Function implements following index queries:
+ * glGetFragDataIndex
+ */
+GLint
+_mesa_program_resource_location_index(struct gl_shader_program *shProg,
+ GLenum programInterface, const char *name)
+{
+ struct gl_program_resource *res =
+ _mesa_program_resource_find_name(shProg, programInterface, name, NULL);
+
+ /* Non-existent variable or resource is not referenced by fragment stage. */
+ if (!res || !(res->StageReferences & (1 << MESA_SHADER_FRAGMENT)))
+ return -1;
+
+ return RESOURCE_VAR(res)->index;
+}
+
+static uint8_t
+stage_from_enum(GLenum ref)
+{
+ switch (ref) {
+ case GL_REFERENCED_BY_VERTEX_SHADER:
+ return MESA_SHADER_VERTEX;
+ case GL_REFERENCED_BY_TESS_CONTROL_SHADER:
+ return MESA_SHADER_TESS_CTRL;
+ case GL_REFERENCED_BY_TESS_EVALUATION_SHADER:
+ return MESA_SHADER_TESS_EVAL;
+ case GL_REFERENCED_BY_GEOMETRY_SHADER:
+ return MESA_SHADER_GEOMETRY;
+ case GL_REFERENCED_BY_FRAGMENT_SHADER:
+ return MESA_SHADER_FRAGMENT;
+ case GL_REFERENCED_BY_COMPUTE_SHADER:
+ return MESA_SHADER_COMPUTE;
+ default:
+ assert(!"shader stage not supported");
+ return MESA_SHADER_STAGES;
+ }
+}
+
+/**
+ * Check if resource is referenced by given 'referenced by' stage enum.
+ * ATC and UBO resources hold stage references of their own.
+ */
+static bool
+is_resource_referenced(struct gl_shader_program *shProg,
+ struct gl_program_resource *res,
+ GLuint index, uint8_t stage)
+{
+ /* First, check if we even have such a stage active. */
+ if (!shProg->_LinkedShaders[stage])
+ return false;
+
+ if (res->Type == GL_ATOMIC_COUNTER_BUFFER)
+ return RESOURCE_ATC(res)->StageReferences[stage];
+
+ if (res->Type == GL_UNIFORM_BLOCK || res->Type == GL_SHADER_STORAGE_BLOCK)
+ return shProg->InterfaceBlockStageIndex[stage][index] != -1;
+
+ return res->StageReferences & (1 << stage);
+}
+
+static unsigned
+get_buffer_property(struct gl_shader_program *shProg,
+ struct gl_program_resource *res, const GLenum prop,
+ GLint *val, const char *caller)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ if (res->Type != GL_UNIFORM_BLOCK &&
+ res->Type != GL_ATOMIC_COUNTER_BUFFER &&
+ res->Type != GL_SHADER_STORAGE_BLOCK)
+ goto invalid_operation;
+
+ if (res->Type == GL_UNIFORM_BLOCK) {
+ switch (prop) {
+ case GL_BUFFER_BINDING:
+ *val = RESOURCE_UBO(res)->Binding;
+ return 1;
+ case GL_BUFFER_DATA_SIZE:
+ *val = RESOURCE_UBO(res)->UniformBufferSize;
+ return 1;
+ case GL_NUM_ACTIVE_VARIABLES:
+ *val = 0;
+ for (unsigned i = 0; i < RESOURCE_UBO(res)->NumUniforms; i++) {
+ const char *iname = RESOURCE_UBO(res)->Uniforms[i].IndexName;
+ struct gl_program_resource *uni =
+ _mesa_program_resource_find_name(shProg, GL_UNIFORM, iname,
+ NULL);
+ if (!uni)
+ continue;
+ (*val)++;
+ }
+ return 1;
+ case GL_ACTIVE_VARIABLES: {
+ unsigned num_values = 0;
+ for (unsigned i = 0; i < RESOURCE_UBO(res)->NumUniforms; i++) {
+ const char *iname = RESOURCE_UBO(res)->Uniforms[i].IndexName;
+ struct gl_program_resource *uni =
+ _mesa_program_resource_find_name(shProg, GL_UNIFORM, iname,
+ NULL);
+ if (!uni)
+ continue;
+ *val++ =
+ _mesa_program_resource_index(shProg, uni);
+ num_values++;
+ }
+ return num_values;
+ }
+ }
+ } else if (res->Type == GL_SHADER_STORAGE_BLOCK) {
+ switch (prop) {
+ case GL_BUFFER_BINDING:
+ *val = RESOURCE_UBO(res)->Binding;
+ return 1;
+ case GL_BUFFER_DATA_SIZE:
+ *val = RESOURCE_UBO(res)->UniformBufferSize;
+ return 1;
+ case GL_NUM_ACTIVE_VARIABLES:
+ *val = 0;
+ for (unsigned i = 0; i < RESOURCE_UBO(res)->NumUniforms; i++) {
+ const char *iname = RESOURCE_UBO(res)->Uniforms[i].IndexName;
+ struct gl_program_resource *uni =
+ _mesa_program_resource_find_name(shProg, GL_BUFFER_VARIABLE,
+ iname, NULL);
+ if (!uni)
+ continue;
+ (*val)++;
+ }
+ return 1;
+ case GL_ACTIVE_VARIABLES: {
+ unsigned num_values = 0;
+ for (unsigned i = 0; i < RESOURCE_UBO(res)->NumUniforms; i++) {
+ const char *iname = RESOURCE_UBO(res)->Uniforms[i].IndexName;
+ struct gl_program_resource *uni =
+ _mesa_program_resource_find_name(shProg, GL_BUFFER_VARIABLE,
+ iname, NULL);
+ if (!uni)
+ continue;
+ *val++ =
+ _mesa_program_resource_index(shProg, uni);
+ num_values++;
+ }
+ return num_values;
+ }
+ }
+ } else if (res->Type == GL_ATOMIC_COUNTER_BUFFER) {
+ switch (prop) {
+ case GL_BUFFER_BINDING:
+ *val = RESOURCE_ATC(res)->Binding;
+ return 1;
+ case GL_BUFFER_DATA_SIZE:
+ *val = RESOURCE_ATC(res)->MinimumSize;
+ return 1;
+ case GL_NUM_ACTIVE_VARIABLES:
+ *val = RESOURCE_ATC(res)->NumUniforms;
+ return 1;
+ case GL_ACTIVE_VARIABLES:
+ for (unsigned i = 0; i < RESOURCE_ATC(res)->NumUniforms; i++) {
+ /* Active atomic buffer contains index to UniformStorage. Find
+ * out gl_program_resource via data pointer and then calculate
+ * index of that uniform.
+ */
+ unsigned idx = RESOURCE_ATC(res)->Uniforms[i];
+ struct gl_program_resource *uni =
+ program_resource_find_data(shProg,
+ &shProg->UniformStorage[idx]);
+ assert(uni);
+ *val++ = _mesa_program_resource_index(shProg, uni);
+ }
+ return RESOURCE_ATC(res)->NumUniforms;
+ }
+ }
+ assert(!"support for property type not implemented");
- if (strcmp(var->name, name) == 0)
- return var->location - FRAG_RESULT_DATA0;
+invalid_operation:
+ _mesa_error(ctx, GL_INVALID_OPERATION, "%s(%s prop %s)", caller,
+ _mesa_enum_to_string(res->Type),
+ _mesa_enum_to_string(prop));
+
+ return 0;
+}
+
+unsigned
+_mesa_program_resource_prop(struct gl_shader_program *shProg,
+ struct gl_program_resource *res, GLuint index,
+ const GLenum prop, GLint *val, const char *caller)
+{
+ GET_CURRENT_CONTEXT(ctx);
+
+#define VALIDATE_TYPE(type)\
+ if (res->Type != type)\
+ goto invalid_operation;
+
+#define VALIDATE_TYPE_2(type1, type2)\
+ if (res->Type != type1 && res->Type != type2)\
+ goto invalid_operation;
+
+ switch(prop) {
+ case GL_NAME_LENGTH:
+ switch (res->Type) {
+ case GL_ATOMIC_COUNTER_BUFFER:
+ goto invalid_operation;
+ default:
+ /* Resource name length + terminator. */
+ *val = _mesa_program_resource_name_len(res) + 1;
+ }
+ return 1;
+ case GL_TYPE:
+ switch (res->Type) {
+ case GL_UNIFORM:
+ case GL_BUFFER_VARIABLE:
+ *val = RESOURCE_UNI(res)->type->gl_type;
+ return 1;
+ case GL_PROGRAM_INPUT:
+ case GL_PROGRAM_OUTPUT:
+ *val = RESOURCE_VAR(res)->type->gl_type;
+ return 1;
+ case GL_TRANSFORM_FEEDBACK_VARYING:
+ *val = RESOURCE_XFB(res)->Type;
+ return 1;
+ default:
+ goto invalid_operation;
+ }
+ case GL_ARRAY_SIZE:
+ switch (res->Type) {
+ case GL_UNIFORM:
+ case GL_BUFFER_VARIABLE:
+ /* Test if a buffer variable is an array or an unsized array.
+ * Unsized arrays return zero as array size.
+ */
+ if (RESOURCE_UNI(res)->is_shader_storage &&
+ RESOURCE_UNI(res)->array_stride > 0)
+ *val = RESOURCE_UNI(res)->array_elements;
+ else
+ *val = MAX2(RESOURCE_UNI(res)->array_elements, 1);
+ return 1;
+ case GL_PROGRAM_INPUT:
+ case GL_PROGRAM_OUTPUT:
+ *val = MAX2(_mesa_program_resource_array_size(res), 1);
+ return 1;
+ case GL_TRANSFORM_FEEDBACK_VARYING:
+ *val = MAX2(RESOURCE_XFB(res)->Size, 1);
+ return 1;
+ default:
+ goto invalid_operation;
+ }
+ case GL_OFFSET:
+ VALIDATE_TYPE_2(GL_UNIFORM, GL_BUFFER_VARIABLE);
+ *val = RESOURCE_UNI(res)->offset;
+ return 1;
+ case GL_BLOCK_INDEX:
+ VALIDATE_TYPE_2(GL_UNIFORM, GL_BUFFER_VARIABLE);
+ *val = RESOURCE_UNI(res)->block_index;
+ return 1;
+ case GL_ARRAY_STRIDE:
+ VALIDATE_TYPE_2(GL_UNIFORM, GL_BUFFER_VARIABLE);
+ *val = RESOURCE_UNI(res)->array_stride;
+ return 1;
+ case GL_MATRIX_STRIDE:
+ VALIDATE_TYPE_2(GL_UNIFORM, GL_BUFFER_VARIABLE);
+ *val = RESOURCE_UNI(res)->matrix_stride;
+ return 1;
+ case GL_IS_ROW_MAJOR:
+ VALIDATE_TYPE_2(GL_UNIFORM, GL_BUFFER_VARIABLE);
+ *val = RESOURCE_UNI(res)->row_major;
+ return 1;
+ case GL_ATOMIC_COUNTER_BUFFER_INDEX:
+ VALIDATE_TYPE(GL_UNIFORM);
+ *val = RESOURCE_UNI(res)->atomic_buffer_index;
+ return 1;
+ case GL_BUFFER_BINDING:
+ case GL_BUFFER_DATA_SIZE:
+ case GL_NUM_ACTIVE_VARIABLES:
+ case GL_ACTIVE_VARIABLES:
+ return get_buffer_property(shProg, res, prop, val, caller);
+ case GL_REFERENCED_BY_COMPUTE_SHADER:
+ if (!_mesa_has_compute_shaders(ctx))
+ goto invalid_enum;
+ /* fallthrough */
+ case GL_REFERENCED_BY_VERTEX_SHADER:
+ case GL_REFERENCED_BY_TESS_CONTROL_SHADER:
+ case GL_REFERENCED_BY_TESS_EVALUATION_SHADER:
+ case GL_REFERENCED_BY_GEOMETRY_SHADER:
+ case GL_REFERENCED_BY_FRAGMENT_SHADER:
+ switch (res->Type) {
+ case GL_UNIFORM:
+ case GL_PROGRAM_INPUT:
+ case GL_PROGRAM_OUTPUT:
+ case GL_UNIFORM_BLOCK:
+ case GL_BUFFER_VARIABLE:
+ case GL_SHADER_STORAGE_BLOCK:
+ case GL_ATOMIC_COUNTER_BUFFER:
+ *val = is_resource_referenced(shProg, res, index,
+ stage_from_enum(prop));
+ return 1;
+ default:
+ goto invalid_operation;
+ }
+ case GL_LOCATION:
+ switch (res->Type) {
+ case GL_UNIFORM:
+ case GL_PROGRAM_INPUT:
+ case GL_PROGRAM_OUTPUT:
+ *val = program_resource_location(shProg, res,
+ _mesa_program_resource_name(res),
+ 0);
+ return 1;
+ default:
+ goto invalid_operation;
+ }
+ case GL_LOCATION_INDEX:
+ if (res->Type != GL_PROGRAM_OUTPUT)
+ goto invalid_operation;
+ *val = RESOURCE_VAR(res)->index;
+ return 1;
+
+ case GL_NUM_COMPATIBLE_SUBROUTINES:
+ if (res->Type != GL_VERTEX_SUBROUTINE_UNIFORM &&
+ res->Type != GL_FRAGMENT_SUBROUTINE_UNIFORM &&
+ res->Type != GL_GEOMETRY_SUBROUTINE_UNIFORM &&
+ res->Type != GL_COMPUTE_SUBROUTINE_UNIFORM &&
+ res->Type != GL_TESS_CONTROL_SUBROUTINE_UNIFORM &&
+ res->Type != GL_TESS_EVALUATION_SUBROUTINE_UNIFORM)
+ goto invalid_operation;
+ *val = RESOURCE_UNI(res)->num_compatible_subroutines;
+ return 1;
+ case GL_COMPATIBLE_SUBROUTINES: {
+ const struct gl_uniform_storage *uni;
+ struct gl_shader *sh;
+ unsigned count, i;
+ int j;
+
+ if (res->Type != GL_VERTEX_SUBROUTINE_UNIFORM &&
+ res->Type != GL_FRAGMENT_SUBROUTINE_UNIFORM &&
+ res->Type != GL_GEOMETRY_SUBROUTINE_UNIFORM &&
+ res->Type != GL_COMPUTE_SUBROUTINE_UNIFORM &&
+ res->Type != GL_TESS_CONTROL_SUBROUTINE_UNIFORM &&
+ res->Type != GL_TESS_EVALUATION_SUBROUTINE_UNIFORM)
+ goto invalid_operation;
+ uni = RESOURCE_UNI(res);
+
+ sh = shProg->_LinkedShaders[_mesa_shader_stage_from_subroutine_uniform(res->Type)];
+ count = 0;
+ for (i = 0; i < sh->NumSubroutineFunctions; i++) {
+ struct gl_subroutine_function *fn = &sh->SubroutineFunctions[i];
+ for (j = 0; j < fn->num_compat_types; j++) {
+ if (fn->types[j] == uni->type) {
+ val[count++] = i;
+ break;
+ }
+ }
+ }
+ return count;
+ }
+
+ case GL_TOP_LEVEL_ARRAY_SIZE:
+ VALIDATE_TYPE(GL_BUFFER_VARIABLE);
+ *val = RESOURCE_UNI(res)->top_level_array_size;
+ return 1;
+
+ case GL_TOP_LEVEL_ARRAY_STRIDE:
+ VALIDATE_TYPE(GL_BUFFER_VARIABLE);
+ *val = RESOURCE_UNI(res)->top_level_array_stride;
+ return 1;
+
+ /* GL_ARB_tessellation_shader */
+ case GL_IS_PER_PATCH:
+ switch (res->Type) {
+ case GL_PROGRAM_INPUT:
+ case GL_PROGRAM_OUTPUT:
+ *val = RESOURCE_VAR(res)->patch;
+ return 1;
+ default:
+ goto invalid_operation;
+ }
+ default:
+ goto invalid_enum;
}
- return -1;
+#undef VALIDATE_TYPE
+#undef VALIDATE_TYPE_2
+
+invalid_enum:
+ _mesa_error(ctx, GL_INVALID_ENUM, "%s(%s prop %s)", caller,
+ _mesa_enum_to_string(res->Type),
+ _mesa_enum_to_string(prop));
+ return 0;
+
+invalid_operation:
+ _mesa_error(ctx, GL_INVALID_OPERATION, "%s(%s prop %s)", caller,
+ _mesa_enum_to_string(res->Type),
+ _mesa_enum_to_string(prop));
+ return 0;
+}
+
+extern void
+_mesa_get_program_resourceiv(struct gl_shader_program *shProg,
+ GLenum programInterface, GLuint index, GLsizei propCount,
+ const GLenum *props, GLsizei bufSize,
+ GLsizei *length, GLint *params)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ GLint *val = (GLint *) params;
+ const GLenum *prop = props;
+ GLsizei amount = 0;
+
+ struct gl_program_resource *res =
+ _mesa_program_resource_find_index(shProg, programInterface, index);
+
+ /* No such resource found or bufSize negative. */
+ if (!res || bufSize < 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glGetProgramResourceiv(%s index %d bufSize %d)",
+ _mesa_enum_to_string(programInterface), index, bufSize);
+ return;
+ }
+
+ /* Write propCount values until error occurs or bufSize reached. */
+ for (int i = 0; i < propCount && i < bufSize; i++, val++, prop++) {
+ int props_written =
+ _mesa_program_resource_prop(shProg, res, index, *prop, val,
+ "glGetProgramResourceiv");
+
+ /* Error happened. */
+ if (props_written == 0)
+ return;
+
+ amount += props_written;
+ }
+
+ /* If <length> is not NULL, the actual number of integer values
+ * written to <params> will be written to <length>.
+ */
+ if (length)
+ *length = amount;
+}
+
+static bool
+validate_io(const struct gl_shader *producer,
+ const struct gl_shader *consumer, bool isES)
+{
+ assert(producer && consumer);
+ unsigned inputs = 0, outputs = 0;
+
+ /* From OpenGL ES 3.1 spec (Interface matching):
+ *
+ * "An output variable is considered to match an input variable in the
+ * subsequent shader if:
+ *
+ * - the two variables match in name, type, and qualification; or
+ * - the two variables are declared with the same location qualifier and
+ * match in type and qualification.
+ *
+ * ...
+ *
+ * At an interface between program objects, the set of inputs and outputs
+ * are considered to match exactly if and only if:
+ *
+ * - Every declared input variable has a matching output, as described
+ * above.
+ *
+ * - There are no user-defined output variables declared without a
+ * matching input variable declaration.
+ *
+ * - All matched input and output variables have identical precision
+ * qualification.
+ *
+ * When the set of inputs and outputs on an interface between programs
+ * matches exactly, all inputs are well-defined except when the
+ * corresponding outputs were not written in the previous shader. However,
+ * any mismatch between inputs and outputs will result in a validation
+ * failure."
+ *
+ * OpenGL Core 4.5 spec includes same paragraph as above but without check
+ * for precision and the last 'validation failure' clause. Therefore
+ * behaviour is more relaxed, input and output amount is not required by the
+ * spec to be validated.
+ *
+ * FIXME: Update once Khronos spec bug #15331 is resolved.
+ * FIXME: Add validation by type, currently information loss during varying
+ * packing makes this challenging.
+ */
+
+ /* Currently no matching done for desktop. */
+ if (!isES)
+ return true;
+
+ /* For each output in a, find input in b and do any required checks. */
+ foreach_in_list(ir_instruction, out, producer->ir) {
+ ir_variable *out_var = out->as_variable();
+ if (!out_var || out_var->data.mode != ir_var_shader_out ||
+ is_gl_identifier(out_var->name))
+ continue;
+
+ outputs++;
+
+ inputs = 0;
+ foreach_in_list(ir_instruction, in, consumer->ir) {
+ ir_variable *in_var = in->as_variable();
+ if (!in_var || in_var->data.mode != ir_var_shader_in ||
+ is_gl_identifier(in_var->name))
+ continue;
+
+ inputs++;
+
+ /* Match by location qualifier and precision.
+ *
+ * FIXME: Add explicit location matching validation here. Be careful
+ * not to match varyings with explicit locations to varyings without
+ * explicit locations.
+ */
+ if ((in_var->data.explicit_location &&
+ out_var->data.explicit_location) &&
+ in_var->data.location == out_var->data.location &&
+ in_var->data.precision == out_var->data.precision)
+ continue;
+
+ unsigned len = strlen(in_var->name);
+
+ /* Handle input swizzle in variable name. */
+ const char *dot = strchr(in_var->name, '.');
+ if (dot)
+ len = dot - in_var->name;
+
+ /* Match by name and precision. */
+ if (strncmp(in_var->name, out_var->name, len) == 0) {
+ /* From OpenGL ES 3.1 spec:
+ * "When both shaders are in separate programs, mismatched
+ * precision qualifiers will result in a program interface
+ * mismatch that will result in program pipeline validation
+ * failures, as described in section 7.4.1 (“Shader Interface
+ * Matching”) of the OpenGL ES 3.1 Specification."
+ */
+ if (in_var->data.precision != out_var->data.precision)
+ return false;
+ }
+ }
+ }
+ return inputs == outputs;
+}
+
+/**
+ * Validate inputs against outputs in a program pipeline.
+ */
+extern "C" bool
+_mesa_validate_pipeline_io(struct gl_pipeline_object *pipeline)
+{
+ struct gl_shader_program **shProg =
+ (struct gl_shader_program **) pipeline->CurrentProgram;
+
+ /* Find first active stage in pipeline. */
+ unsigned idx, prev = 0;
+ for (idx = 0; idx < ARRAY_SIZE(pipeline->CurrentProgram); idx++) {
+ if (shProg[idx]) {
+ prev = idx;
+ break;
+ }
+ }
+
+ for (idx = prev + 1; idx < ARRAY_SIZE(pipeline->CurrentProgram); idx++) {
+ if (shProg[idx]) {
+ /* Pipeline might include both non-compute and a compute program, do
+ * not attempt to validate varyings between non-compute and compute
+ * stage.
+ */
+ if (shProg[idx]->_LinkedShaders[idx]->Stage == MESA_SHADER_COMPUTE)
+ break;
+
+ if (!validate_io(shProg[prev]->_LinkedShaders[prev],
+ shProg[idx]->_LinkedShaders[idx],
+ shProg[prev]->IsES || shProg[idx]->IsES))
+ return false;
+ prev = idx;
+ }
+ }
+ return true;
}
projects / mesa.git / blobdiff