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-rw-r--r--mesalib/src/mesa/main/uniform_query.cpp885
1 files changed, 862 insertions, 23 deletions
diff --git a/mesalib/src/mesa/main/uniform_query.cpp b/mesalib/src/mesa/main/uniform_query.cpp
index ba7d7591f..39aa5570e 100644
--- a/mesalib/src/mesa/main/uniform_query.cpp
+++ b/mesalib/src/mesa/main/uniform_query.cpp
@@ -22,15 +22,20 @@
* 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"
-
-extern "C" {
+#include "../glsl/ir_uniform.h"
#include "main/shaderapi.h"
#include "main/shaderobj.h"
#include "uniforms.h"
-}
+
extern "C" void GLAPIENTRY
_mesa_GetActiveUniformARB(GLhandleARB program, GLuint index,
@@ -40,41 +45,875 @@ _mesa_GetActiveUniformARB(GLhandleARB program, GLuint index,
GET_CURRENT_CONTEXT(ctx);
struct gl_shader_program *shProg =
_mesa_lookup_shader_program_err(ctx, program, "glGetActiveUniform");
- const struct gl_program_parameter *param;
if (!shProg)
return;
- if (!shProg->Uniforms || index >= shProg->Uniforms->NumUniforms) {
+ if (index >= shProg->NumUserUniformStorage) {
_mesa_error(ctx, GL_INVALID_VALUE, "glGetActiveUniform(index)");
return;
}
- param = get_uniform_parameter(shProg, index);
- if (!param)
- return;
-
- const struct gl_uniform *const uni = &shProg->Uniforms->Uniforms[index];
+ const struct gl_uniform_storage *const uni = &shProg->UniformStorage[index];
if (nameOut) {
- _mesa_copy_string(nameOut, maxLength, length, param->Name);
+ _mesa_copy_string(nameOut, maxLength, length, uni->name);
}
if (size) {
- GLint typeSize = _mesa_sizeof_glsl_type(uni->Type->gl_type);
- if ((GLint) param->Size > typeSize) {
- /* This is an array.
- * Array elements are placed on vector[4] boundaries so they're
- * a multiple of four floats. We round typeSize up to next multiple
- * of four to get the right size below.
- */
- typeSize = (typeSize + 3) & ~3;
- }
- /* Note that the returned size is in units of the <type>, not bytes */
- *size = param->Size / typeSize;
+ /* 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;
+ *type = uni->type->gl_type;
+ }
+}
+
+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;
+ }
+
+ /* 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 (*array_index != 0 && shProg->UniformStorage[*loc].array_elements == 0) {
+ _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];
+
+ 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;
+ }
+ }
+ }
+ }
+}
+
+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;
+
+ 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;
+
+ assert(sizeof(prog->SamplerUnits) == sizeof(shProg->SamplerUnits));
+
+ if (memcmp(prog->SamplerUnits,
+ shProg->SamplerUnits,
+ sizeof(shProg->SamplerUnits)) != 0) {
+ 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 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 glGetUniformLocation().
+ *
+ * The return value will encode two values, the uniform location and an
+ * offset (used for arrays, structs).
+ */
+extern "C" GLint
+_mesa_get_uniform_location(struct gl_context *ctx,
+ struct gl_shader_program *shProg,
+ const GLchar *name)
+{
+ 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 -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;
+
+ array_lookup = true;
+ } else {
+ name_copy = (char *) name;
+ offset = 0;
+ array_lookup = false;
+ }
+
+ unsigned location;
+ 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 -1;
+
+ /* 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 (array_lookup && shProg->UniformStorage[location].array_elements == 0) {
+ return -1;
+ }
+
+ return _mesa_uniform_merge_location_offset(location, offset);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 17:07:26 +0000