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authormarha <marha@users.sourceforge.net>2011-10-05 17:37:34 +0200
committermarha <marha@users.sourceforge.net>2011-10-05 17:37:34 +0200
commitf7025b4baa1ba35ee796785641f04eac5bedb0a6 (patch)
tree3df62b7b501a478e212397883657a8a8be4db7a3 /mesalib/src/mesa/main/shader_query.cpp
parent60adbfdea1ee754341d64454274e7aa83bae8971 (diff)
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mkfontscale pixman xserver xtrans libX11 libXdmcp libxcb libXmu mesa git update 5 oct 2011
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diff --git a/mesalib/src/mesa/main/shader_query.cpp b/mesalib/src/mesa/main/shader_query.cpp
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+/*
+ * Copyright © 2011 Intel Corporation
+ *
+ * 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 (including the next
+ * paragraph) 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.
+ */
+
+/**
+ * \file shader_query.cpp
+ * C-to-C++ bridge functions to query GLSL shader data
+ *
+ * \author Ian Romanick <ian.d.romanick@intel.com>
+ */
+
+#include "main/core.h"
+#include "glsl_symbol_table.h"
+#include "ir.h"
+#include "shaderobj.h"
+#include "program/hash_table.h"
+#include "../glsl/program.h"
+
+extern "C" {
+#include "shaderapi.h"
+}
+
+void GLAPIENTRY
+_mesa_BindAttribLocationARB(GLhandleARB program, GLuint index,
+ const GLcharARB *name)
+{
+ GET_CURRENT_CONTEXT(ctx);
+
+ struct gl_shader_program *const shProg =
+ _mesa_lookup_shader_program_err(ctx, program, "glBindAttribLocation");
+ if (!shProg)
+ return;
+
+ if (!name)
+ return;
+
+ if (strncmp(name, "gl_", 3) == 0) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glBindAttribLocation(illegal name)");
+ return;
+ }
+
+ if (index >= ctx->Const.VertexProgram.MaxAttribs) {
+ _mesa_error(ctx, GL_INVALID_VALUE, "glBindAttribLocation(index)");
+ return;
+ }
+
+ /* Replace the current value if it's already in the list. Add
+ * VERT_ATTRIB_GENERIC0 because that's how the linker differentiates
+ * between built-in attributes and user-defined attributes.
+ */
+ shProg->AttributeBindings->put(index + VERT_ATTRIB_GENERIC0, name);
+
+ /*
+ * Note that this attribute binding won't go into effect until
+ * glLinkProgram is called again.
+ */
+}
+
+void GLAPIENTRY
+_mesa_GetActiveAttribARB(GLhandleARB program, GLuint desired_index,
+ GLsizei maxLength, GLsizei * length, GLint * size,
+ GLenum * type, GLcharARB * name)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ struct gl_shader_program *shProg;
+
+ shProg = _mesa_lookup_shader_program_err(ctx, program, "glGetActiveAttrib");
+ if (!shProg)
+ return;
+
+ if (!shProg->LinkStatus) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glGetActiveAttrib(program not linked)");
+ return;
+ }
+
+ if (shProg->_LinkedShaders[MESA_SHADER_VERTEX] == NULL) {
+ _mesa_error(ctx, GL_INVALID_VALUE, "glGetActiveAttrib(no vertex shader)");
+ return;
+ }
+
+ exec_list *const ir = shProg->_LinkedShaders[MESA_SHADER_VERTEX]->ir;
+ unsigned current_index = 0;
+
+ foreach_list(node, ir) {
+ const ir_variable *const var = ((ir_instruction *) node)->as_variable();
+
+ if (var == NULL
+ || var->mode != ir_var_in
+ || var->location == -1
+ || var->location < VERT_ATTRIB_GENERIC0)
+ continue;
+
+ if (current_index == desired_index) {
+ _mesa_copy_string(name, maxLength, length, var->name);
+
+ if (size)
+ *size = (var->type->is_array()) ? var->type->length : 1;
+
+ if (type)
+ *type = var->type->gl_type;
+
+ return;
+ }
+
+ current_index++;
+ }
+
+ /* 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)");
+}
+
+GLint GLAPIENTRY
+_mesa_GetAttribLocationARB(GLhandleARB program, const GLcharARB * name)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ struct gl_shader_program *const shProg =
+ _mesa_lookup_shader_program_err(ctx, program, "glGetAttribLocation");
+
+ if (!shProg) {
+ return -1;
+ }
+
+ if (!shProg->LinkStatus) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glGetAttribLocation(program not linked)");
+ return -1;
+ }
+
+ if (!name)
+ return -1;
+
+ /* Not having a vertex shader is not an error.
+ */
+ 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();
+
+ /* 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->mode != ir_var_in
+ || var->location == -1
+ || var->location < VERT_ATTRIB_GENERIC0)
+ continue;
+
+ if (strcmp(var->name, name) == 0)
+ return var->location - VERT_ATTRIB_GENERIC0;
+ }
+
+ return -1;
+}
+
+
+unsigned
+_mesa_count_active_attribs(struct gl_shader_program *shProg)
+{
+ if (!shProg->LinkStatus
+ || shProg->_LinkedShaders[MESA_SHADER_VERTEX] == NULL) {
+ 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->mode != ir_var_in
+ || var->location == -1
+ || var->location < VERT_ATTRIB_GENERIC0)
+ continue;
+
+ i++;
+ }
+
+ return i;
+}
+
+
+size_t
+_mesa_longest_attribute_name_length(struct gl_shader_program *shProg)
+{
+ if (!shProg->LinkStatus
+ || shProg->_LinkedShaders[MESA_SHADER_VERTEX] == NULL) {
+ return 0;
+ }
+
+ exec_list *const ir = shProg->_LinkedShaders[MESA_SHADER_VERTEX]->ir;
+ size_t longest = 0;
+
+ foreach_list(node, ir) {
+ const ir_variable *const var = ((ir_instruction *) node)->as_variable();
+
+ if (var == NULL
+ || var->mode != ir_var_in
+ || var->location == -1
+ || var->location < VERT_ATTRIB_GENERIC0)
+ continue;
+
+ const size_t len = strlen(var->name);
+ if (len >= longest)
+ longest = len + 1;
+ }
+
+ return longest;
+}