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29 /* stdbool.h is necessary because this file is included in both C and C++ code.
33 #include "program/prog_parameter.h" /* For union gl_constant_value. */
40 enum gl_uniform_driver_format
{
41 uniform_native
= 0, /**< Store data in the native format. */
42 uniform_int_float
, /**< Store integer data as floats. */
43 uniform_bool_float
, /**< Store boolean data as floats. */
46 * Store boolean data as integer using 1 for \c true.
51 * Store boolean data as integer using ~0 for \c true.
53 uniform_bool_int_0_not0
56 struct gl_uniform_driver_storage
{
58 * Number of bytes from one array element to the next.
60 uint8_t element_stride
;
63 * Number of bytes from one vector in a matrix to the next.
65 uint8_t vector_stride
;
68 * Base format of the stored data.
70 * This field must have a value from \c GLSL_TYPE_UINT through \c
76 * Pointer to the base of the data.
81 struct gl_uniform_storage
{
83 /** Type of this uniform data stored.
85 * In the case of an array, it's the type of a single array element.
87 const struct glsl_type
*type
;
90 * The number of elements in this uniform.
92 * For non-arrays, this is always 0. For arrays, the value is the size of
95 unsigned array_elements
;
98 * Has this uniform ever been set?
106 * If \c ::base_type is \c GLSL_TYPE_SAMPLER, this represents the index
107 * of this sampler. If \c ::array_elements is not zero, the array will
108 * use sampler indices \c ::sampler through \c ::sampler +
109 * \c ::array_elements - 1, inclusive.
111 * Note that the index may be different in each shader stage.
116 * Whether this sampler is used in this shader stage.
119 } sampler
[MESA_SHADER_TYPES
];
122 * Storage used by the driver for the uniform
124 unsigned num_driver_storage
;
125 struct gl_uniform_driver_storage
*driver_storage
;
128 * Storage used by Mesa for the uniform
130 * This form of the uniform is used by Mesa's implementation of \c
131 * glGetUniform. It can also be used by drivers to obtain the value of the
132 * uniform if the \c ::driver_storage interface is not used.
134 union gl_constant_value
*storage
;
136 /** Fields for GL_ARB_uniform_buffer_object
141 * GL_UNIFORM_BLOCK_INDEX: index of the uniform block containing
142 * the uniform, or -1 for the default uniform block. Note that the
143 * index is into the linked program's UniformBlocks[] array, not
144 * the linked shader's.
148 /** GL_UNIFORM_OFFSET: byte offset within the uniform block, or -1. */
152 * GL_UNIFORM_MATRIX_STRIDE: byte stride between columns or rows of
153 * a matrix. Set to 0 for non-matrices in UBOs, or -1 for uniforms
154 * in the default uniform block.
159 * GL_UNIFORM_ARRAY_STRIDE: byte stride between elements of the
160 * array. Set to zero for non-arrays in UBOs, or -1 for uniforms
161 * in the default uniform block.
165 /** GL_UNIFORM_ROW_MAJOR: true iff it's a row-major matrix in a UBO */
171 * Index within gl_shader_program::AtomicBuffers[] of the atomic
172 * counter buffer this uniform is stored in, or -1 if this is not
175 int atomic_buffer_index
;
182 #endif /* IR_UNIFORM_H */