/* * Mesa 3-D graphics library * * Copyright (C) 2004-2008 Brian Paul All Rights Reserved. * Copyright (C) 2009-2010 VMware, Inc. All Rights Reserved. * Copyright © 2010, 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 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 * BRIAN PAUL 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 <stdlib.h> #include "main/core.h" #include "main/context.h" #include "ir.h" #include "ir_uniform.h" #include "program/hash_table.h" #include "../glsl/program.h" #include "../glsl/ir_uniform.h" #include "main/shaderapi.h" #include "main/shaderobj.h" #include "uniforms.h" extern "C" void GLAPIENTRY _mesa_GetActiveUniform(GLhandleARB program, GLuint index, GLsizei maxLength, GLsizei *length, GLint *size, GLenum *type, GLcharARB *nameOut) { GET_CURRENT_CONTEXT(ctx); struct gl_shader_program *shProg = _mesa_lookup_shader_program_err(ctx, program, "glGetActiveUniform"); if (!shProg) return; if (index >= shProg->NumUserUniformStorage) { _mesa_error(ctx, GL_INVALID_VALUE, "glGetActiveUniform(index)"); return; } const struct gl_uniform_storage *const uni = &shProg->UniformStorage[index]; if (nameOut) { _mesa_get_uniform_name(uni, maxLength, length, nameOut); } if (size) { /* array_elements is zero for non-arrays, but the API requires that 1 be * returned. */ *size = MAX2(1, uni->array_elements); } if (type) { *type = uni->type->gl_type; } } extern "C" void GLAPIENTRY _mesa_GetActiveUniformsiv(GLuint program, GLsizei uniformCount, const GLuint *uniformIndices, GLenum pname, GLint *params) { GET_CURRENT_CONTEXT(ctx); struct gl_shader_program *shProg; GLsizei i; shProg = _mesa_lookup_shader_program_err(ctx, program, "glGetActiveUniform"); if (!shProg) return; if (uniformCount < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "glGetUniformIndices(uniformCount < 0)"); return; } for (i = 0; i < uniformCount; i++) { GLuint index = uniformIndices[i]; if (index >= shProg->NumUserUniformStorage) { _mesa_error(ctx, GL_INVALID_VALUE, "glGetActiveUniformsiv(index)"); return; } } for (i = 0; i < uniformCount; i++) { GLuint index = uniformIndices[i]; const struct gl_uniform_storage *uni = &shProg->UniformStorage[index]; switch (pname) { case GL_UNIFORM_TYPE: params[i] = uni->type->gl_type; break; case GL_UNIFORM_SIZE: /* array_elements is zero for non-arrays, but the API requires that 1 be * returned. */ params[i] = MAX2(1, uni->array_elements); break; case GL_UNIFORM_NAME_LENGTH: params[i] = strlen(uni->name) + 1; /* 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]"." */ if (uni->array_elements != 0) params[i] += 3; break; case GL_UNIFORM_BLOCK_INDEX: params[i] = uni->block_index; break; case GL_UNIFORM_OFFSET: params[i] = uni->offset; break; case GL_UNIFORM_ARRAY_STRIDE: params[i] = uni->array_stride; break; case GL_UNIFORM_MATRIX_STRIDE: params[i] = uni->matrix_stride; break; case GL_UNIFORM_IS_ROW_MAJOR: params[i] = uni->row_major; break; default: _mesa_error(ctx, GL_INVALID_ENUM, "glGetActiveUniformsiv(pname)"); return; } } } static bool validate_uniform_parameters(struct gl_context *ctx, struct gl_shader_program *shProg, GLint location, GLsizei count, unsigned *loc, unsigned *array_index, const char *caller, bool negative_one_is_not_valid) { if (!shProg || !shProg->LinkStatus) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(program not linked)", caller); return false; } if (location == -1) { /* For glGetUniform, page 264 (page 278 of the PDF) of the OpenGL 2.1 * spec says: * * "The error INVALID_OPERATION is generated if program has not been * linked successfully, or if location is not a valid location for * program." * * For glUniform, page 82 (page 96 of the PDF) of the OpenGL 2.1 spec * says: * * "If the value of location is -1, the Uniform* commands will * silently ignore the data passed in, and the current uniform * values will not be changed." * * Allowing -1 for the location parameter of glUniform allows * applications to avoid error paths in the case that, for example, some * uniform variable is removed by the compiler / linker after * optimization. In this case, the new value of the uniform is dropped * on the floor. For the case of glGetUniform, there is nothing * sensible to do for a location of -1. * * The negative_one_is_not_valid flag selects between the two behaviors. */ if (negative_one_is_not_valid) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(location=%d)", caller, location); } return false; } /* From page 12 (page 26 of the PDF) of the OpenGL 2.1 spec: * * "If a negative number is provided where an argument of type sizei or * sizeiptr is specified, the error INVALID_VALUE is generated." */ if (count < 0) { _mesa_error(ctx, GL_INVALID_VALUE, "%s(count < 0)", caller); return false; } /* Page 82 (page 96 of the PDF) of the OpenGL 2.1 spec says: * * "If any of the following conditions occur, an INVALID_OPERATION * error is generated by the Uniform* commands, and no uniform values * are changed: * * ... * * - if no variable with a location of location exists in the * program object currently in use and location is not -1, * - if count is greater than one, and the uniform declared in the * shader is not an array variable, */ if (location < -1) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(location=%d)", caller, location); return false; } _mesa_uniform_split_location_offset(location, loc, array_index); if (*loc >= shProg->NumUserUniformStorage) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(location=%d)", caller, location); return false; } if (shProg->UniformStorage[*loc].array_elements == 0 && count > 1) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(count > 1 for non-array, location=%d)", caller, location); return false; } /* If the uniform is an array, check that array_index is in bounds. * If not an array, check that array_index is zero. * array_index is unsigned so no need to check for less than zero. */ unsigned limit = shProg->UniformStorage[*loc].array_elements; if (limit == 0) limit = 1; if (*array_index >= limit) { _mesa_error(ctx, GL_INVALID_OPERATION, "%s(location=%d)", caller, location); return false; } return true; } /** * Called via glGetUniform[fiui]v() to get the current value of a uniform. */ extern "C" void _mesa_get_uniform(struct gl_context *ctx, GLuint program, GLint location, GLsizei bufSize, enum glsl_base_type returnType, GLvoid *paramsOut) { struct gl_shader_program *shProg = _mesa_lookup_shader_program_err(ctx, program, "glGetUniformfv"); struct gl_uniform_storage *uni; unsigned loc, offset; if (!validate_uniform_parameters(ctx, shProg, location, 1, &loc, &offset, "glGetUniform", true)) return; uni = &shProg->UniformStorage[loc]; { unsigned elements = (uni->type->is_sampler()) ? 1 : uni->type->components(); /* Calculate the source base address *BEFORE* modifying elements to * account for the size of the user's buffer. */ const union gl_constant_value *const src = &uni->storage[offset * elements]; assert(returnType == GLSL_TYPE_FLOAT || returnType == GLSL_TYPE_INT || returnType == GLSL_TYPE_UINT); /* The three (currently) supported types all have the same size, * which is of course the same as their union. That'll change * with glGetUniformdv()... */ unsigned bytes = sizeof(src[0]) * elements; if (bufSize < 0 || bytes > (unsigned) bufSize) { _mesa_error( ctx, GL_INVALID_OPERATION, "glGetnUniform*vARB(out of bounds: bufSize is %d," " but %u bytes are required)", bufSize, bytes ); return; } /* If the return type and the uniform's native type are "compatible," * just memcpy the data. If the types are not compatible, perform a * slower convert-and-copy process. */ if (returnType == uni->type->base_type || ((returnType == GLSL_TYPE_INT || returnType == GLSL_TYPE_UINT || returnType == GLSL_TYPE_SAMPLER) && (uni->type->base_type == GLSL_TYPE_INT || uni->type->base_type == GLSL_TYPE_UINT || uni->type->base_type == GLSL_TYPE_SAMPLER))) { memcpy(paramsOut, src, bytes); } else { union gl_constant_value *const dst = (union gl_constant_value *) paramsOut; /* This code could be optimized by putting the loop inside the switch * statements. However, this is not expected to be * performance-critical code. */ for (unsigned i = 0; i < elements; i++) { switch (returnType) { case GLSL_TYPE_FLOAT: switch (uni->type->base_type) { case GLSL_TYPE_UINT: dst[i].f = (float) src[i].u; break; case GLSL_TYPE_INT: case GLSL_TYPE_SAMPLER: dst[i].f = (float) src[i].i; break; case GLSL_TYPE_BOOL: dst[i].f = src[i].i ? 1.0f : 0.0f; break; default: assert(!"Should not get here."); break; } break; case GLSL_TYPE_INT: case GLSL_TYPE_UINT: switch (uni->type->base_type) { case GLSL_TYPE_FLOAT: /* While the GL 3.2 core spec doesn't explicitly * state how conversion of float uniforms to integer * values works, in section 6.2 "State Tables" on * page 267 it says: * * "Unless otherwise specified, when floating * point state is returned as integer values or * integer state is returned as floating-point * values it is converted in the fashion * described in section 6.1.2" * * That section, on page 248, says: * * "If GetIntegerv or GetInteger64v are called, * a floating-point value is rounded to the * nearest integer..." */ dst[i].i = IROUND(src[i].f); break; case GLSL_TYPE_BOOL: dst[i].i = src[i].i ? 1 : 0; break; default: assert(!"Should not get here."); break; } break; default: assert(!"Should not get here."); break; } } } } } static void log_uniform(const void *values, enum glsl_base_type basicType, unsigned rows, unsigned cols, unsigned count, bool transpose, const struct gl_shader_program *shProg, GLint location, const struct gl_uniform_storage *uni) { const union gl_constant_value *v = (const union gl_constant_value *) values; const unsigned elems = rows * cols * count; const char *const extra = (cols == 1) ? "uniform" : "uniform matrix"; printf("Mesa: set program %u %s \"%s\" (loc %d, type \"%s\", " "transpose = %s) to: ", shProg->Name, extra, uni->name, location, uni->type->name, transpose ? "true" : "false"); for (unsigned i = 0; i < elems; i++) { if (i != 0 && ((i % rows) == 0)) printf(", "); switch (basicType) { case GLSL_TYPE_UINT: printf("%u ", v[i].u); break; case GLSL_TYPE_INT: printf("%d ", v[i].i); break; case GLSL_TYPE_FLOAT: printf("%g ", v[i].f); break; default: assert(!"Should not get here."); break; } } printf("\n"); fflush(stdout); } #if 0 static void log_program_parameters(const struct gl_shader_program *shProg) { static const char *stages[] = { "vertex", "fragment", "geometry" }; assert(Elements(stages) == MESA_SHADER_TYPES); for (unsigned i = 0; i < MESA_SHADER_TYPES; i++) { if (shProg->_LinkedShaders[i] == NULL) continue; const struct gl_program *const prog = shProg->_LinkedShaders[i]->Program; printf("Program %d %s shader parameters:\n", shProg->Name, stages[i]); for (unsigned j = 0; j < prog->Parameters->NumParameters; j++) { printf("%s: %p %f %f %f %f\n", prog->Parameters->Parameters[j].Name, prog->Parameters->ParameterValues[j], prog->Parameters->ParameterValues[j][0].f, prog->Parameters->ParameterValues[j][1].f, prog->Parameters->ParameterValues[j][2].f, prog->Parameters->ParameterValues[j][3].f); } } fflush(stdout); } #endif /** * Propagate some values from uniform backing storage to driver storage * * Values propagated from uniform backing storage to driver storage * have all format / type conversions previously requested by the * driver applied. This function is most often called by the * implementations of \c glUniform1f, etc. and \c glUniformMatrix2f, * etc. * * \param uni Uniform whose data is to be propagated to driver storage * \param array_index If \c uni is an array, this is the element of * the array to be propagated. * \param count Number of array elements to propagate. */ extern "C" void _mesa_propagate_uniforms_to_driver_storage(struct gl_uniform_storage *uni, unsigned array_index, unsigned count) { unsigned i; /* vector_elements and matrix_columns can be 0 for samplers. */ const unsigned components = MAX2(1, uni->type->vector_elements); const unsigned vectors = MAX2(1, uni->type->matrix_columns); /* Store the data in the driver's requested type in the driver's storage * areas. */ unsigned src_vector_byte_stride = components * 4; for (i = 0; i < uni->num_driver_storage; i++) { struct gl_uniform_driver_storage *const store = &uni->driver_storage[i]; uint8_t *dst = (uint8_t *) store->data; const unsigned extra_stride = store->element_stride - (vectors * store->vector_stride); const uint8_t *src = (uint8_t *) (&uni->storage[array_index * (components * vectors)].i); #if 0 printf("%s: %p[%d] components=%u vectors=%u count=%u vector_stride=%u " "extra_stride=%u\n", __func__, dst, array_index, components, vectors, count, store->vector_stride, extra_stride); #endif dst += array_index * store->element_stride; switch (store->format) { case uniform_native: case uniform_bool_int_0_1: { unsigned j; unsigned v; for (j = 0; j < count; j++) { for (v = 0; v < vectors; v++) { memcpy(dst, src, src_vector_byte_stride); src += src_vector_byte_stride; dst += store->vector_stride; } dst += extra_stride; } break; } case uniform_int_float: case uniform_bool_float: { const int *isrc = (const int *) src; unsigned j; unsigned v; unsigned c; for (j = 0; j < count; j++) { for (v = 0; v < vectors; v++) { for (c = 0; c < components; c++) { ((float *) dst)[c] = (float) *isrc; isrc++; } dst += store->vector_stride; } dst += extra_stride; } break; } case uniform_bool_int_0_not0: { const int *isrc = (const int *) src; unsigned j; unsigned v; unsigned c; for (j = 0; j < count; j++) { for (v = 0; v < vectors; v++) { for (c = 0; c < components; c++) { ((int *) dst)[c] = *isrc == 0 ? 0 : ~0; isrc++; } dst += store->vector_stride; } dst += extra_stride; } break; } default: assert(!"Should not get here."); break; } } } /** * Called via glUniform*() functions. */ extern "C" void _mesa_uniform(struct gl_context *ctx, struct gl_shader_program *shProg, GLint location, GLsizei count, const GLvoid *values, GLenum type) { unsigned loc, offset; unsigned components; unsigned src_components; enum glsl_base_type basicType; struct gl_uniform_storage *uni; if (!validate_uniform_parameters(ctx, shProg, location, count, &loc, &offset, "glUniform", false)) return; uni = &shProg->UniformStorage[loc]; /* Verify that the types are compatible. */ switch (type) { case GL_FLOAT: basicType = GLSL_TYPE_FLOAT; src_components = 1; break; case GL_FLOAT_VEC2: basicType = GLSL_TYPE_FLOAT; src_components = 2; break; case GL_FLOAT_VEC3: basicType = GLSL_TYPE_FLOAT; src_components = 3; break; case GL_FLOAT_VEC4: basicType = GLSL_TYPE_FLOAT; src_components = 4; break; case GL_UNSIGNED_INT: basicType = GLSL_TYPE_UINT; src_components = 1; break; case GL_UNSIGNED_INT_VEC2: basicType = GLSL_TYPE_UINT; src_components = 2; break; case GL_UNSIGNED_INT_VEC3: basicType = GLSL_TYPE_UINT; src_components = 3; break; case GL_UNSIGNED_INT_VEC4: basicType = GLSL_TYPE_UINT; src_components = 4; break; case GL_INT: basicType = GLSL_TYPE_INT; src_components = 1; break; case GL_INT_VEC2: basicType = GLSL_TYPE_INT; src_components = 2; break; case GL_INT_VEC3: basicType = GLSL_TYPE_INT; src_components = 3; break; case GL_INT_VEC4: basicType = GLSL_TYPE_INT; src_components = 4; break; case GL_BOOL: case GL_BOOL_VEC2: case GL_BOOL_VEC3: case GL_BOOL_VEC4: case GL_FLOAT_MAT2: case GL_FLOAT_MAT2x3: case GL_FLOAT_MAT2x4: case GL_FLOAT_MAT3x2: case GL_FLOAT_MAT3: case GL_FLOAT_MAT3x4: case GL_FLOAT_MAT4x2: case GL_FLOAT_MAT4x3: case GL_FLOAT_MAT4: default: _mesa_problem(NULL, "Invalid type in %s", __func__); return; } if (uni->type->is_sampler()) { components = 1; } else { components = uni->type->vector_elements; } bool match; switch (uni->type->base_type) { case GLSL_TYPE_BOOL: match = true; break; case GLSL_TYPE_SAMPLER: match = (basicType == GLSL_TYPE_INT); break; default: match = (basicType == uni->type->base_type); break; } if (uni->type->is_matrix() || components != src_components || !match) { _mesa_error(ctx, GL_INVALID_OPERATION, "glUniform(type mismatch)"); return; } if (ctx->Shader.Flags & GLSL_UNIFORMS) { log_uniform(values, basicType, components, 1, count, false, shProg, location, uni); } /* Page 100 (page 116 of the PDF) of the OpenGL 3.0 spec says: * * "Setting a sampler's value to i selects texture image unit number * i. The values of i range from zero to the implementation- dependent * maximum supported number of texture image units." * * In addition, table 2.3, "Summary of GL errors," on page 17 (page 33 of * the PDF) says: * * "Error Description Offending command * ignored? * ... * INVALID_VALUE Numeric argument out of range Yes" * * Based on that, when an invalid sampler is specified, we generate a * GL_INVALID_VALUE error and ignore the command. */ if (uni->type->is_sampler()) { int i; for (i = 0; i < count; i++) { const unsigned texUnit = ((unsigned *) values)[i]; /* check that the sampler (tex unit index) is legal */ if (texUnit >= ctx->Const.MaxCombinedTextureImageUnits) { _mesa_error(ctx, GL_INVALID_VALUE, "glUniform1i(invalid sampler/tex unit index for " "uniform %d)", location); return; } } } /* Page 82 (page 96 of the PDF) of the OpenGL 2.1 spec says: * * "When loading N elements starting at an arbitrary position k in a * uniform declared as an array, elements k through k + N - 1 in the * array will be replaced with the new values. Values for any array * element that exceeds the highest array element index used, as * reported by GetActiveUniform, will be ignored by the GL." * * Clamp 'count' to a valid value. Note that for non-arrays a count > 1 * will have already generated an error. */ if (uni->array_elements != 0) { count = MIN2(count, (int) (uni->array_elements - offset)); } FLUSH_VERTICES(ctx, _NEW_PROGRAM_CONSTANTS); /* Store the data in the "actual type" backing storage for the uniform. */ if (!uni->type->is_boolean()) { memcpy(&uni->storage[components * offset], values, sizeof(uni->storage[0]) * components * count); } else { const union gl_constant_value *src = (const union gl_constant_value *) values; union gl_constant_value *dst = &uni->storage[components * offset]; const unsigned elems = components * count; unsigned i; for (i = 0; i < elems; i++) { if (basicType == GLSL_TYPE_FLOAT) { dst[i].i = src[i].f != 0.0f ? 1 : 0; } else { dst[i].i = src[i].i != 0 ? 1 : 0; } } } uni->initialized = true; _mesa_propagate_uniforms_to_driver_storage(uni, offset, count); /* If the uniform is a sampler, do the extra magic necessary to propagate * the changes through. */ if (uni->type->is_sampler()) { int i; for (i = 0; i < count; i++) { shProg->SamplerUnits[uni->sampler + offset + i] = ((unsigned *) values)[i]; } bool flushed = false; for (i = 0; i < MESA_SHADER_TYPES; i++) { struct gl_shader *const sh = shProg->_LinkedShaders[i]; /* If the shader stage doesn't use any samplers, don't bother * checking if any samplers have changed. */ if (sh == NULL || sh->active_samplers == 0) continue; struct gl_program *const prog = sh->Program; assert(sizeof(prog->SamplerUnits) == sizeof(shProg->SamplerUnits)); /* Determine if any of the samplers used by this shader stage have * been modified. */ bool changed = false; for (unsigned j = 0; j < Elements(prog->SamplerUnits); j++) { if ((sh->active_samplers & (1U << j)) != 0 && (prog->SamplerUnits[j] != shProg->SamplerUnits[j])) { changed = true; break; } } if (changed) { if (!flushed) { FLUSH_VERTICES(ctx, _NEW_TEXTURE | _NEW_PROGRAM); flushed = true; } memcpy(prog->SamplerUnits, shProg->SamplerUnits, sizeof(shProg->SamplerUnits)); _mesa_update_shader_textures_used(shProg, prog); if (ctx->Driver.SamplerUniformChange) ctx->Driver.SamplerUniformChange(ctx, prog->Target, prog); } } } } /** * Called by glUniformMatrix*() functions. * Note: cols=2, rows=4 ==> array[2] of vec4 */ extern "C" void _mesa_uniform_matrix(struct gl_context *ctx, struct gl_shader_program *shProg, GLuint cols, GLuint rows, GLint location, GLsizei count, GLboolean transpose, const GLfloat *values) { unsigned loc, offset; unsigned vectors; unsigned components; unsigned elements; struct gl_uniform_storage *uni; if (!validate_uniform_parameters(ctx, shProg, location, count, &loc, &offset, "glUniformMatrix", false)) return; uni = &shProg->UniformStorage[loc]; if (!uni->type->is_matrix()) { _mesa_error(ctx, GL_INVALID_OPERATION, "glUniformMatrix(non-matrix uniform)"); return; } assert(!uni->type->is_sampler()); vectors = uni->type->matrix_columns; components = uni->type->vector_elements; /* Verify that the types are compatible. This is greatly simplified for * matrices because they can only have a float base type. */ if (vectors != cols || components != rows) { _mesa_error(ctx, GL_INVALID_OPERATION, "glUniformMatrix(matrix size mismatch)"); return; } /* GL_INVALID_VALUE is generated if `transpose' is not GL_FALSE. * http://www.khronos.org/opengles/sdk/docs/man/xhtml/glUniform.xml */ if (ctx->API == API_OPENGLES || (ctx->API == API_OPENGLES2 && ctx->Version < 30)) { if (transpose) { _mesa_error(ctx, GL_INVALID_VALUE, "glUniformMatrix(matrix transpose is not GL_FALSE)"); return; } } if (ctx->Shader.Flags & GLSL_UNIFORMS) { log_uniform(values, GLSL_TYPE_FLOAT, components, vectors, count, bool(transpose), shProg, location, uni); } /* Page 82 (page 96 of the PDF) of the OpenGL 2.1 spec says: * * "When loading N elements starting at an arbitrary position k in a * uniform declared as an array, elements k through k + N - 1 in the * array will be replaced with the new values. Values for any array * element that exceeds the highest array element index used, as * reported by GetActiveUniform, will be ignored by the GL." * * Clamp 'count' to a valid value. Note that for non-arrays a count > 1 * will have already generated an error. */ if (uni->array_elements != 0) { count = MIN2(count, (int) (uni->array_elements - offset)); } FLUSH_VERTICES(ctx, _NEW_PROGRAM_CONSTANTS); /* Store the data in the "actual type" backing storage for the uniform. */ elements = components * vectors; if (!transpose) { memcpy(&uni->storage[elements * offset], values, sizeof(uni->storage[0]) * elements * count); } else { /* Copy and transpose the matrix. */ const float *src = values; float *dst = &uni->storage[elements * offset].f; for (int i = 0; i < count; i++) { for (unsigned r = 0; r < rows; r++) { for (unsigned c = 0; c < cols; c++) { dst[(c * components) + r] = src[c + (r * vectors)]; } } dst += elements; src += elements; } } uni->initialized = true; _mesa_propagate_uniforms_to_driver_storage(uni, offset, count); } /** * Called via glGetUniformLocation(). * * Returns the uniform index into UniformStorage (also the * glGetActiveUniformsiv uniform index), and stores the referenced * array offset in *offset, or GL_INVALID_INDEX (-1). Those two * return values can be encoded into a uniform location for * glUniform* using _mesa_uniform_merge_location_offset(index, offset). */ extern "C" unsigned _mesa_get_uniform_location(struct gl_context *ctx, struct gl_shader_program *shProg, const GLchar *name, unsigned *out_offset) { const size_t len = strlen(name); long offset; bool array_lookup; char *name_copy; /* If the name ends with a ']', assume that it refers to some element of an * array. Malformed array references will fail the hash table look up * below, so it doesn't matter that they are not caught here. This code * only wants to catch the "leaf" array references so that arrays of * structures containing arrays will be handled correctly. */ if (name[len-1] == ']') { unsigned i; /* Walk backwards over the string looking for a non-digit character. * This had better be the opening bracket for an array index. * * Initially, i specifies the location of the ']'. Since the string may * contain only the ']' charcater, walk backwards very carefully. */ for (i = len - 1; (i > 0) && isdigit(name[i-1]); --i) /* empty */ ; /* Page 80 (page 94 of the PDF) of the OpenGL 2.1 spec says: * * "The first element of a uniform array is identified using the * name of the uniform array appended with "[0]". Except if the last * part of the string name indicates a uniform array, then the * location of the first element of that array can be retrieved by * either using the name of the uniform array, or the name of the * uniform array appended with "[0]"." * * Page 79 (page 93 of the PDF) of the OpenGL 2.1 spec says: * * "name must be a null terminated string, without white space." * * Return an error if there is no opening '[' to match the closing ']'. * An error will also be returned if there is intervening white space * (or other non-digit characters) before the opening '['. */ if ((i == 0) || name[i-1] != '[') return GL_INVALID_INDEX; /* Return an error if there are no digits between the opening '[' to * match the closing ']'. */ if (i == (len - 1)) return GL_INVALID_INDEX; /* Make a new string that is a copy of the old string up to (but not * including) the '[' character. */ name_copy = (char *) malloc(i); memcpy(name_copy, name, i - 1); name_copy[i-1] = '\0'; offset = strtol(&name[i], NULL, 10); if (offset < 0) { free(name_copy); return GL_INVALID_INDEX; } array_lookup = true; } else { name_copy = (char *) name; offset = 0; array_lookup = false; } unsigned location = 0; const bool found = shProg->UniformHash->get(location, name_copy); assert(!found || strcmp(name_copy, shProg->UniformStorage[location].name) == 0); /* Free the temporary buffer *before* possibly returning an error. */ if (name_copy != name) free(name_copy); if (!found) return GL_INVALID_INDEX; /* If the uniform is an array, fail if the index is out of bounds. * (A negative index is caught above.) This also fails if the uniform * is not an array, but the user is trying to index it, because * array_elements is zero and offset >= 0. */ if (array_lookup && offset >= (long) shProg->UniformStorage[location].array_elements) { return GL_INVALID_INDEX; } *out_offset = offset; return location; } extern "C" bool _mesa_sampler_uniforms_are_valid(const struct gl_shader_program *shProg, char *errMsg, size_t errMsgLength) { const glsl_type *unit_types[MAX_COMBINED_TEXTURE_IMAGE_UNITS]; memset(unit_types, 0, sizeof(unit_types)); for (unsigned i = 0; i < shProg->NumUserUniformStorage; i++) { const struct gl_uniform_storage *const storage = &shProg->UniformStorage[i]; const glsl_type *const t = (storage->type->is_array()) ? storage->type->fields.array : storage->type; if (!t->is_sampler()) continue; const unsigned count = MAX2(1, storage->type->array_size()); for (unsigned j = 0; j < count; j++) { const unsigned unit = storage->storage[j].i; /* The types of the samplers associated with a particular texture * unit must be an exact match. Page 74 (page 89 of the PDF) of the * OpenGL 3.3 core spec says: * * "It is not allowed to have variables of different sampler * types pointing to the same texture image unit within a program * object." */ if (unit_types[unit] == NULL) { unit_types[unit] = t; } else if (unit_types[unit] != t) { _mesa_snprintf(errMsg, errMsgLength, "Texture unit %d is accessed both as %s and %s", unit, unit_types[unit]->name, t->name); return false; } } } return true; }