/**
* 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 GLvoid *values, enum glsl_base_type basicType)
{
unsigned offset;
unsigned vectors;
unsigned components;
unsigned elements;
int size_mul;
struct gl_uniform_storage *const uni =
validate_uniform_parameters(ctx, shProg, location, count,
&offset, "glUniformMatrix");
if (uni == NULL)
return;
if (!uni->type->is_matrix()) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glUniformMatrix(non-matrix uniform)");
return;
}
assert(basicType == GLSL_TYPE_FLOAT || basicType == GLSL_TYPE_DOUBLE);
size_mul = basicType == GLSL_TYPE_DOUBLE ? 2 : 1;
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 (transpose) {
if (ctx->API == API_OPENGLES2 && ctx->Version < 30) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glUniformMatrix(matrix transpose is not GL_FALSE)");
return;
}
}
/* Section 2.11.7 (Uniform Variables) of the OpenGL 4.2 Core Profile 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 the uniform declared in the shader is not of type boolean and
* the type indicated in the name of the Uniform* command used does
* not match the type of the uniform"
*
* There are no Boolean matrix types, so we do not need to allow
* GLSL_TYPE_BOOL here (as _mesa_uniform does).
*/
if (uni->type->base_type != basicType) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glUniformMatrix%ux%u(\"%s\"@%d is %s, not %s)",
cols, rows, uni->name, location,
glsl_type_name(uni->type->base_type),
glsl_type_name(basicType));
return;
}
if (unlikely(ctx->_Shader->Flags & GLSL_UNIFORMS)) {
log_uniform(values, uni->type->base_type, 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 * size_mul);
} else if (basicType == GLSL_TYPE_FLOAT) {
/* Copy and transpose the matrix.
*/
const float *src = (const float *)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;
}
} else {
assert(basicType == GLSL_TYPE_DOUBLE);
const double *src = (const double *)values;
double *dst = (double *)&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 glUniform*() functions.
*/
extern "C" void
_mesa_uniform(struct gl_context *ctx, struct gl_shader_program *shProg,
GLint location, GLsizei count,
const GLvoid *values,
enum glsl_base_type basicType,
unsigned src_components)
{
unsigned offset;
int size_mul = basicType == GLSL_TYPE_DOUBLE ? 2 : 1;
struct gl_uniform_storage *const uni =
validate_uniform_parameters(ctx, shProg, location, count,
&offset, "glUniform");
if (uni == NULL)
return;
if (uni->type->is_matrix()) {
/* Can't set matrix uniforms (like mat4) with glUniform */
_mesa_error(ctx, GL_INVALID_OPERATION,
"glUniform%u(uniform \"%s\"@%d is matrix)",
src_components, uni->name, location);
return;
}
/* Verify that the types are compatible.
*/
const unsigned components = uni->type->is_sampler()
? 1 : uni->type->vector_elements;
if (components != src_components) {
/* glUniformN() must match float/vecN type */
_mesa_error(ctx, GL_INVALID_OPERATION,
"glUniform%u(\"%s\"@%u has %u components, not %u)",
src_components, uni->name, location,
components, src_components);
return;
}
bool match;
switch (uni->type->base_type) {
case GLSL_TYPE_BOOL:
match = (basicType != GLSL_TYPE_DOUBLE);
break;
case GLSL_TYPE_SAMPLER:
match = (basicType == GLSL_TYPE_INT);
break;
case GLSL_TYPE_IMAGE:
match = (basicType == GLSL_TYPE_INT && _mesa_is_desktop_gl(ctx));
break;
default:
match = (basicType == uni->type->base_type);
break;
}
if (!match) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glUniform%u(\"%s\"@%d is %s, not %s)",
src_components, uni->name, location,
glsl_type_name(uni->type->base_type),
glsl_type_name(basicType));
return;
}
if (unlikely(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()) {
for (int 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;
}
}
}
if (uni->type->is_image()) {
for (int i = 0; i < count; i++) {
const int unit = ((GLint *) values)[i];
/* check that the image unit is legal */
if (unit < 0 || unit >= (int)ctx->Const.MaxImageUnits) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glUniform1i(invalid image 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[size_mul * components * offset], values,
sizeof(uni->storage[0]) * components * count * size_mul);
} 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;
for (unsigned i = 0; i < elems; i++) {
if (basicType == GLSL_TYPE_FLOAT) {
dst[i].i = src[i].f != 0.0f ? ctx->Const.UniformBooleanTrue : 0;
} else {
dst[i].i = src[i].i != 0 ? ctx->Const.UniformBooleanTrue : 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()) {
bool flushed = false;
for (int i = 0; i < MESA_SHADER_STAGES; i++) {
struct gl_shader *const sh = shProg->_LinkedShaders[i];
/* If the shader stage doesn't use the sampler uniform, skip this.
*/
if (sh == NULL || !uni->sampler[i].active)
continue;
for (int j = 0; j < count; j++) {
sh->SamplerUnits[uni->sampler[i].index + offset + j] =
((unsigned *) values)[j];
}
struct gl_program *const prog = sh->Program;
assert(sizeof(prog->SamplerUnits) == sizeof(sh->SamplerUnits));
/* Determine if any of the samplers used by this shader stage have
* been modified.
*/
bool changed = false;
for (unsigned j = 0; j < ARRAY_SIZE(prog->SamplerUnits); j++) {
if ((sh->active_samplers & (1U << j)) != 0
&& (prog->SamplerUnits[j] != sh->SamplerUnits[j])) {
changed = true;
break;
}
}
if (changed) {
if (!flushed) {
FLUSH_VERTICES(ctx, _NEW_TEXTURE | _NEW_PROGRAM);
flushed = true;
}
memcpy(prog->SamplerUnits,
sh->SamplerUnits,
sizeof(sh->SamplerUnits));
_mesa_update_shader_textures_used(shProg, prog);
if (ctx->Driver.SamplerUniformChange)
ctx->Driver.SamplerUniformChange(ctx, prog->Target, prog);
}
}
}
/* If the uniform is an image, update the mapping from image
* uniforms to image units present in the shader data structure.
*/
if (uni->type->is_image()) {
for (int i = 0; i < MESA_SHADER_STAGES; i++) {
if (uni->image[i].active) {
struct gl_shader *sh = shProg->_LinkedShaders[i];
for (int j = 0; j < count; j++)
sh->ImageUnits[uni->image[i].index + offset + j] =
((GLint *) values)[j];
}
}
ctx->NewDriverState |= ctx->DriverFlags.NewImageUnits;
}
}
/**
* 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");
unsigned offset;
struct gl_uniform_storage *const uni =
validate_uniform_parameters(ctx, shProg, location, 1,
&offset, "glGetUniform");
if (uni == NULL) {
/* 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.
*
* If the location was -1, validate_unfirom_parameters will return NULL
* without raising an error. Raise the error here.
*/
if (location == -1) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glGetUniform(location=%d)",
location);
}
return;
}
if ((uni->type->base_type == GLSL_TYPE_DOUBLE &&
returnType != GLSL_TYPE_DOUBLE) ||
(uni->type->base_type != GLSL_TYPE_DOUBLE &&
returnType == GLSL_TYPE_DOUBLE)) {
_mesa_error( ctx, GL_INVALID_OPERATION,
"glGetnUniform*vARB(incompatible uniform types)");
return;
}
{
unsigned elements = (uni->type->is_sampler())
? 1 : uni->type->components();
const int dmul = uni->type->base_type == GLSL_TYPE_DOUBLE ? 2 : 1;
/* 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 * dmul];
assert(returnType == GLSL_TYPE_FLOAT || returnType == GLSL_TYPE_INT ||
returnType == GLSL_TYPE_UINT || returnType == GLSL_TYPE_DOUBLE);
/* doubles have a different size than the other 3 types */
unsigned bytes = sizeof(src[0]) * elements * dmul;
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)
&&
(uni->type->base_type == GLSL_TYPE_INT
|| uni->type->base_type == GLSL_TYPE_UINT
|| uni->type->base_type == GLSL_TYPE_SAMPLER
|| uni->type->base_type == GLSL_TYPE_IMAGE))) {
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:
case GLSL_TYPE_IMAGE:
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;
}
}
}
}
}
/**
* 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;
ASSERT_OUTSIDE_BEGIN_END(ctx);
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;
}
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) {
if (offset >= uni->array_elements)
return;
count = MIN2(count, (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 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;
ASSERT_OUTSIDE_BEGIN_END(ctx);
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) {
if (offset >= uni->array_elements)
return;
count = MIN2(count, (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_program *prog;
if (shProg->_LinkedShaders[i] == NULL)
continue;
prog = shProg->_LinkedShaders[i]->Program;
/* If the shader stage doesn't use any samplers, don't bother
* checking if any samplers have changed.
*/
if (prog->SamplersUsed == 0)
continue;
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 ((prog->SamplersUsed & (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(prog);
(void) ctx->Driver.ProgramStringNotify(ctx, prog->Target, prog);
}
}
}
}
/**
* 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];
unsigned bytes = sizeof(uni->storage[0]) * elements;
if (bytes > (unsigned) bufSize) {
elements = bufSize / sizeof(uni->storage[0]);
bytes = bufSize;
}
/* 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;
}
}
}
}
}
