* 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.
+ * 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.
*/
+
#include <stdlib.h>
+
#include "main/core.h"
#include "main/context.h"
#include "ir.h"
#include "program/hash_table.h"
#include "../glsl/program.h"
#include "../glsl/ir_uniform.h"
-
-extern "C" {
+#include "../glsl/glsl_parser_extras.h"
#include "main/shaderapi.h"
#include "main/shaderobj.h"
#include "uniforms.h"
-}
+
extern "C" void GLAPIENTRY
-_mesa_GetActiveUniformARB(GLhandleARB program, GLuint index,
- GLsizei maxLength, GLsizei *length, GLint *size,
- GLenum *type, GLcharARB *nameOut)
+_mesa_GetActiveUniform(GLuint program, GLuint index,
+ GLsizei maxLength, GLsizei *length, GLint *size,
+ GLenum *type, GLcharARB *nameOut)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_shader_program *shProg =
const struct gl_uniform_storage *const uni = &shProg->UniformStorage[index];
if (nameOut) {
- _mesa_copy_string(nameOut, maxLength, length, uni->name);
+ _mesa_get_uniform_name(uni, maxLength, length, nameOut);
}
if (size) {
}
}
-static bool
+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,
+ "glGetActiveUniformsiv(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;
+
+ case GL_UNIFORM_ATOMIC_COUNTER_BUFFER_INDEX:
+ if (!ctx->Extensions.ARB_shader_atomic_counters)
+ goto invalid_enum;
+ params[i] = uni->atomic_buffer_index;
+ break;
+
+ default:
+ goto invalid_enum;
+ }
+ }
+
+ return;
+
+ invalid_enum:
+ _mesa_error(ctx, GL_INVALID_ENUM, "glGetActiveUniformsiv(pname)");
+}
+
+static struct gl_uniform_storage *
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;
+ return NULL;
}
if (location == -1) {
caller, location);
}
- return false;
+ return NULL;
}
/* From page 12 (page 26 of the PDF) of the OpenGL 2.1 spec:
*/
if (count < 0) {
_mesa_error(ctx, GL_INVALID_VALUE, "%s(count < 0)", caller);
- return false;
+ return NULL;
}
/* Page 82 (page 96 of the PDF) of the OpenGL 2.1 spec says:
if (location < -1) {
_mesa_error(ctx, GL_INVALID_OPERATION, "%s(location=%d)",
caller, location);
- return false;
+ return NULL;
}
- _mesa_uniform_split_location_offset(location, loc, array_index);
-
- if (*loc >= shProg->NumUserUniformStorage) {
+ /* Check that the given location is in bounds of uniform remap table. */
+ if (location >= (GLint) shProg->NumUniformRemapTable) {
_mesa_error(ctx, GL_INVALID_OPERATION, "%s(location=%d)",
caller, location);
- return false;
+ return NULL;
}
- if (shProg->UniformStorage[*loc].array_elements == 0 && count > 1) {
+ /* If the driver storage pointer in remap table is -1, we ignore silently.
+ *
+ * GL_ARB_explicit_uniform_location spec says:
+ * "What happens if Uniform* is called with an explicitly defined
+ * uniform location, but that uniform is deemed inactive by the
+ * linker?
+ *
+ * RESOLVED: The call is ignored for inactive uniform variables and
+ * no error is generated."
+ *
+ */
+ if (shProg->UniformRemapTable[location] ==
+ INACTIVE_UNIFORM_EXPLICIT_LOCATION)
+ return NULL;
+
+ unsigned loc;
+ _mesa_uniform_split_location_offset(shProg, location, &loc, array_index);
+ struct gl_uniform_storage *const uni = &shProg->UniformStorage[loc];
+
+ if (uni->array_elements == 0 && count > 1) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(count > 1 for non-array, location=%d)",
caller, location);
- return false;
+ return NULL;
}
- /* This case should be impossible. The implication is that a call like
- * glGetUniformLocation(prog, "foo[8]") was successful but "foo" is not an
- * array.
+ /* 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.
*/
- if (*array_index != 0 && shProg->UniformStorage[*loc].array_elements == 0) {
+ const unsigned limit = MAX2(uni->array_elements, 1);
+ if (*array_index >= limit) {
_mesa_error(ctx, GL_INVALID_OPERATION, "%s(location=%d)",
caller, location);
- return false;
+ return NULL;
}
- return true;
+ return uni;
}
/**
{
struct gl_shader_program *shProg =
_mesa_lookup_shader_program_err(ctx, program, "glGetUniformfv");
- struct gl_uniform_storage *uni;
- unsigned loc, offset;
+ unsigned offset;
- if (!validate_uniform_parameters(ctx, shProg, location, 1,
- &loc, &offset, "glGetUniform", true))
+ struct gl_uniform_storage *const uni =
+ validate_uniform_parameters(ctx, shProg, location, 1,
+ &offset, "glGetUniform", true);
+ if (uni == NULL)
return;
- uni = &shProg->UniformStorage[loc];
-
{
unsigned elements = (uni->type->is_sampler())
? 1 : uni->type->components();
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;
+ 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,"
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++) {
+ for (unsigned i = 0; i < MESA_SHADER_STAGES; 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]);
+ shProg->Name, _mesa_shader_stage_to_string(i));
for (unsigned j = 0; j < prog->Parameters->NumParameters; j++) {
printf("%s: %p %f %f %f %f\n",
prog->Parameters->Parameters[j].Name,
GLint location, GLsizei count,
const GLvoid *values, GLenum type)
{
- unsigned loc, offset;
+ unsigned 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))
+ struct gl_uniform_storage *const uni =
+ validate_uniform_parameters(ctx, shProg, location, count,
+ &offset, "glUniform", false);
+ if (uni == NULL)
return;
- uni = &shProg->UniformStorage[loc];
-
/* Verify that the types are compatible.
*/
switch (type) {
match = true;
break;
case GLSL_TYPE_SAMPLER:
+ case GLSL_TYPE_IMAGE:
match = (basicType == GLSL_TYPE_INT);
break;
default:
return;
}
- if (ctx->Shader.Flags & GLSL_UNIFORMS) {
+ if (ctx->_Shader->Flags & GLSL_UNIFORMS) {
log_uniform(values, basicType, components, 1, count,
false, shProg, location, uni);
}
}
}
+ if (uni->type->is_image()) {
+ int i;
+
+ for (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
* will have already generated an error.
*/
if (uni->array_elements != 0) {
- if (offset >= uni->array_elements)
- return;
-
- count = MIN2(count, (uni->array_elements - offset));
+ count = MIN2(count, (int) (uni->array_elements - offset));
}
FLUSH_VERTICES(ctx, _NEW_PROGRAM_CONSTANTS);
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;
+ for (i = 0; i < MESA_SHADER_STAGES; i++) {
+ struct gl_shader *const sh = shProg->_LinkedShaders[i];
+ int j;
- if (shProg->_LinkedShaders[i] == NULL)
+ /* If the shader stage doesn't use the sampler uniform, skip this.
+ */
+ if (sh == NULL || !uni->sampler[i].active)
continue;
- prog = shProg->_LinkedShaders[i]->Program;
+ for (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(shProg->SamplerUnits));
+ 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 < Elements(prog->SamplerUnits); j++) {
+ if ((sh->active_samplers & (1U << j)) != 0
+ && (prog->SamplerUnits[j] != sh->SamplerUnits[j])) {
+ changed = true;
+ break;
+ }
+ }
- if (memcmp(prog->SamplerUnits,
- shProg->SamplerUnits,
- sizeof(shProg->SamplerUnits)) != 0) {
+ if (changed) {
if (!flushed) {
FLUSH_VERTICES(ctx, _NEW_TEXTURE | _NEW_PROGRAM);
flushed = true;
}
memcpy(prog->SamplerUnits,
- shProg->SamplerUnits,
- sizeof(shProg->SamplerUnits));
+ sh->SamplerUnits,
+ sizeof(sh->SamplerUnits));
- _mesa_update_shader_textures_used(prog);
- (void) ctx->Driver.ProgramStringNotify(ctx, prog->Target, prog);
+ _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()) {
+ int i, j;
+
+ for (i = 0; i < MESA_SHADER_STAGES; i++) {
+ if (uni->image[i].active) {
+ struct gl_shader *sh = shProg->_LinkedShaders[i];
+
+ for (j = 0; j < count; j++)
+ sh->ImageUnits[uni->image[i].index + offset + j] =
+ ((GLint *) values)[j];
+ }
+ }
+
+ ctx->NewDriverState |= ctx->DriverFlags.NewImageUnits;
+ }
}
/**
GLint location, GLsizei count,
GLboolean transpose, const GLfloat *values)
{
- unsigned loc, offset;
+ unsigned 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))
+ struct gl_uniform_storage *const uni =
+ validate_uniform_parameters(ctx, shProg, location, count,
+ &offset, "glUniformMatrix", false);
+ if (uni == NULL)
return;
- uni = &shProg->UniformStorage[loc];
if (!uni->type->is_matrix()) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glUniformMatrix(non-matrix uniform)");
return;
}
- if (ctx->Shader.Flags & GLSL_UNIFORMS) {
+ /* 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);
}
* will have already generated an error.
*/
if (uni->array_elements != 0) {
- if (offset >= uni->array_elements)
- return;
-
- count = MIN2(count, (uni->array_elements - offset));
+ count = MIN2(count, (int) (uni->array_elements - offset));
}
FLUSH_VERTICES(ctx, _NEW_PROGRAM_CONSTANTS);
_mesa_propagate_uniforms_to_driver_storage(uni, offset, count);
}
+
/**
* Called via glGetUniformLocation().
*
- * The return value will encode two values, the uniform location and an
- * offset (used for arrays, structs).
+ * 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" GLint
+extern "C" unsigned
_mesa_get_uniform_location(struct gl_context *ctx,
struct gl_shader_program *shProg,
- const GLchar *name)
+ 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.
+ /* 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]"."
+ *
+ * Note: since uniform names are not allowed to use whitespace, and array
+ * indices within uniform names are not allowed to use "+", "-", or leading
+ * zeros, it follows that each uniform has a unique name up to the possible
+ * ambiguity with "[0]" noted above. Therefore we don't need to worry
+ * about mal-formed inputs--they will properly fail when we try to look up
+ * the uniform name in shProg->UniformHash.
*/
- 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 -1;
-
- /* Return an error if there are no digits between the opening '[' to
- * match the closing ']'.
- */
- if (i == (len - 1))
- return -1;
-
- /* 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)
- return -1;
+ const GLchar *base_name_end;
+ long offset = parse_program_resource_name(name, &base_name_end);
+ bool array_lookup = offset >= 0;
+ char *name_copy;
- array_lookup = true;
+ if (array_lookup) {
+ name_copy = (char *) malloc(base_name_end - name + 1);
+ memcpy(name_copy, name, base_name_end - name);
+ name_copy[base_name_end - name] = '\0';
} else {
name_copy = (char *) name;
offset = 0;
- array_lookup = false;
}
- unsigned location;
+ unsigned location = 0;
const bool found = shProg->UniformHash->get(location, name_copy);
assert(!found
free(name_copy);
if (!found)
- return -1;
+ return GL_INVALID_INDEX;
- /* Since array_elements is 0 for non-arrays, this causes look-ups of 'a[0]'
- * to (correctly) fail if 'a' is not an array.
+ /* 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 && shProg->UniformStorage[location].array_elements == 0) {
- return -1;
+ if (array_lookup
+ && offset >= (long) shProg->UniformStorage[location].array_elements) {
+ return GL_INVALID_INDEX;
}
- return _mesa_uniform_merge_location_offset(location, offset);
+ *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;
+}
+
+extern "C" bool
+_mesa_sampler_uniforms_pipeline_are_valid(struct gl_pipeline_object *pipeline)
+{
+ /* Section 2.11.11 (Shader Execution), subheading "Validation," of the
+ * OpenGL 4.1 spec says:
+ *
+ * "[INVALID_OPERATION] is generated by any command that transfers
+ * vertices to the GL if:
+ *
+ * ...
+ *
+ * - Any two active samplers in the current program object are of
+ * different types, but refer to the same texture image unit.
+ *
+ * - The number of active samplers in the program exceeds the
+ * maximum number of texture image units allowed."
+ */
+ unsigned active_samplers = 0;
+ const struct gl_shader_program **shProg =
+ (const struct gl_shader_program **) pipeline->CurrentProgram;
+
+ const glsl_type *unit_types[MAX_COMBINED_TEXTURE_IMAGE_UNITS];
+ memset(unit_types, 0, sizeof(unit_types));
+
+ for (unsigned idx = 0; idx < ARRAY_SIZE(pipeline->CurrentProgram); idx++) {
+ if (!shProg[idx])
+ continue;
+
+ for (unsigned i = 0; i < shProg[idx]->NumUserUniformStorage; i++) {
+ const struct gl_uniform_storage *const storage =
+ &shProg[idx]->UniformStorage[i];
+ const glsl_type *const t = (storage->type->is_array())
+ ? storage->type->fields.array : storage->type;
+
+ if (!t->is_sampler())
+ continue;
+
+ active_samplers++;
+
+ 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) {
+ pipeline->InfoLog =
+ ralloc_asprintf(pipeline,
+ "Texture unit %d is accessed both as %s "
+ "and %s",
+ unit, unit_types[unit]->name, t->name);
+ return false;
+ }
+ }
+ }
+ }
+
+ if (active_samplers > MAX_COMBINED_TEXTURE_IMAGE_UNITS) {
+ pipeline->InfoLog =
+ ralloc_asprintf(pipeline,
+ "the number of active samplers %d exceed the "
+ "maximum %d",
+ active_samplers, MAX_COMBINED_TEXTURE_IMAGE_UNITS);
+ return false;
+ }
+
+ return true;
}
projects / mesa.git / blobdiff