diff options
Diffstat (limited to 'src/mesa/main/transformfeedback.c')
| -rw-r--r-- | src/mesa/main/transformfeedback.c | 944 |
1 files changed, 0 insertions, 944 deletions
diff --git a/src/mesa/main/transformfeedback.c b/src/mesa/main/transformfeedback.c deleted file mode 100644 index d297b5e..0000000 --- a/src/mesa/main/transformfeedback.c +++ /dev/null @@ -1,944 +0,0 @@ -/* - * Mesa 3-D graphics library - * - * Copyright (C) 2010 VMware, Inc. All Rights Reserved. - * - * 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 - * THE AUTHORS 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. - */ - - -/* - * Vertex transform feedback support. - * - * Authors: - * Brian Paul - */ - - -#include "buffers.h" -#include "bufferobj.h" -#include "context.h" -#include "hash.h" -#include "transformfeedback.h" -#include "shaderapi.h" -#include "shaderobj.h" -#include "main/dispatch.h" - -#include "program/prog_parameter.h" -//#include "program/shader_api.h" - - -#if FEATURE_EXT_transform_feedback - - -/** - * Do reference counting of transform feedback buffers. - */ -static void -reference_transform_feedback_object(struct gl_transform_feedback_object **ptr, - struct gl_transform_feedback_object *obj) -{ - if (*ptr == obj) - return; - - if (*ptr) { - /* Unreference the old object */ - struct gl_transform_feedback_object *oldObj = *ptr; - - ASSERT(oldObj->RefCount > 0); - oldObj->RefCount--; - - if (oldObj->RefCount == 0) { - GET_CURRENT_CONTEXT(ctx); - if (ctx) - ctx->Driver.DeleteTransformFeedback(ctx, oldObj); - } - - *ptr = NULL; - } - ASSERT(!*ptr); - - if (obj) { - /* reference new object */ - if (obj->RefCount == 0) { - _mesa_problem(NULL, "referencing deleted transform feedback object"); - *ptr = NULL; - } - else { - obj->RefCount++; - *ptr = obj; - } - } -} - - -/** - * Check if the given primitive mode (as in glBegin(mode)) is compatible - * with the current transform feedback mode (if it's enabled). - * This is to be called from glBegin(), glDrawArrays(), glDrawElements(), etc. - * - * \return GL_TRUE if the mode is OK, GL_FALSE otherwise. - */ -GLboolean -_mesa_validate_primitive_mode(struct gl_context *ctx, GLenum mode) -{ - if (ctx->TransformFeedback.CurrentObject->Active) { - switch (mode) { - case GL_POINTS: - return ctx->TransformFeedback.Mode == GL_POINTS; - case GL_LINES: - case GL_LINE_STRIP: - case GL_LINE_LOOP: - return ctx->TransformFeedback.Mode == GL_LINES; - default: - return ctx->TransformFeedback.Mode == GL_TRIANGLES; - } - } - return GL_TRUE; -} - - -/** - * Check that all the buffer objects currently bound for transform - * feedback actually exist. Raise a GL_INVALID_OPERATION error if - * any buffers are missing. - * \return GL_TRUE for success, GL_FALSE if error - */ -GLboolean -_mesa_validate_transform_feedback_buffers(struct gl_context *ctx) -{ - /* XXX to do */ - return GL_TRUE; -} - - - -/** - * Per-context init for transform feedback. - */ -void -_mesa_init_transform_feedback(struct gl_context *ctx) -{ - /* core mesa expects this, even a dummy one, to be available */ - ASSERT(ctx->Driver.NewTransformFeedback); - - ctx->TransformFeedback.DefaultObject = - ctx->Driver.NewTransformFeedback(ctx, 0); - - assert(ctx->TransformFeedback.DefaultObject->RefCount == 1); - - reference_transform_feedback_object(&ctx->TransformFeedback.CurrentObject, - ctx->TransformFeedback.DefaultObject); - - assert(ctx->TransformFeedback.DefaultObject->RefCount == 2); - - ctx->TransformFeedback.Objects = _mesa_NewHashTable(); - - _mesa_reference_buffer_object(ctx, - &ctx->TransformFeedback.CurrentBuffer, - ctx->Shared->NullBufferObj); -} - - - -/** - * Callback for _mesa_HashDeleteAll(). - */ -static void -delete_cb(GLuint key, void *data, void *userData) -{ - struct gl_context *ctx = (struct gl_context *) userData; - struct gl_transform_feedback_object *obj = - (struct gl_transform_feedback_object *) data; - - ctx->Driver.DeleteTransformFeedback(ctx, obj); -} - - -/** - * Per-context free/clean-up for transform feedback. - */ -void -_mesa_free_transform_feedback(struct gl_context *ctx) -{ - /* core mesa expects this, even a dummy one, to be available */ - ASSERT(ctx->Driver.NewTransformFeedback); - - _mesa_reference_buffer_object(ctx, - &ctx->TransformFeedback.CurrentBuffer, - NULL); - - /* Delete all feedback objects */ - _mesa_HashDeleteAll(ctx->TransformFeedback.Objects, delete_cb, ctx); - _mesa_DeleteHashTable(ctx->TransformFeedback.Objects); - - /* Delete the default feedback object */ - assert(ctx->Driver.DeleteTransformFeedback); - ctx->Driver.DeleteTransformFeedback(ctx, - ctx->TransformFeedback.DefaultObject); - - ctx->TransformFeedback.CurrentObject = NULL; -} - - -#else /* FEATURE_EXT_transform_feedback */ - -/* forward declarations */ -static struct gl_transform_feedback_object * -new_transform_feedback(struct gl_context *ctx, GLuint name); - -static void -delete_transform_feedback(struct gl_context *ctx, - struct gl_transform_feedback_object *obj); - -/* dummy per-context init/clean-up for transform feedback */ -void -_mesa_init_transform_feedback(struct gl_context *ctx) -{ - ctx->TransformFeedback.DefaultObject = new_transform_feedback(ctx, 0); - ctx->TransformFeedback.CurrentObject = ctx->TransformFeedback.DefaultObject; - _mesa_reference_buffer_object(ctx, - &ctx->TransformFeedback.CurrentBuffer, - ctx->Shared->NullBufferObj); -} - -void -_mesa_free_transform_feedback(struct gl_context *ctx) -{ - _mesa_reference_buffer_object(ctx, - &ctx->TransformFeedback.CurrentBuffer, - NULL); - ctx->TransformFeedback.CurrentObject = NULL; - delete_transform_feedback(ctx, ctx->TransformFeedback.DefaultObject); -} - -#endif /* FEATURE_EXT_transform_feedback */ - - -/** Default fallback for ctx->Driver.NewTransformFeedback() */ -static struct gl_transform_feedback_object * -new_transform_feedback(struct gl_context *ctx, GLuint name) -{ - struct gl_transform_feedback_object *obj; - obj = CALLOC_STRUCT(gl_transform_feedback_object); - if (obj) { - obj->Name = name; - obj->RefCount = 1; - } - return obj; -} - -/** Default fallback for ctx->Driver.DeleteTransformFeedback() */ -static void -delete_transform_feedback(struct gl_context *ctx, - struct gl_transform_feedback_object *obj) -{ - GLuint i; - - for (i = 0; i < Elements(obj->Buffers); i++) { - _mesa_reference_buffer_object(ctx, &obj->Buffers[i], NULL); - } - - free(obj); -} - - -#if FEATURE_EXT_transform_feedback - - -/** Default fallback for ctx->Driver.BeginTransformFeedback() */ -static void -begin_transform_feedback(struct gl_context *ctx, GLenum mode, - struct gl_transform_feedback_object *obj) -{ - /* nop */ -} - -/** Default fallback for ctx->Driver.EndTransformFeedback() */ -static void -end_transform_feedback(struct gl_context *ctx, - struct gl_transform_feedback_object *obj) -{ - /* nop */ -} - -/** Default fallback for ctx->Driver.PauseTransformFeedback() */ -static void -pause_transform_feedback(struct gl_context *ctx, - struct gl_transform_feedback_object *obj) -{ - /* nop */ -} - -/** Default fallback for ctx->Driver.ResumeTransformFeedback() */ -static void -resume_transform_feedback(struct gl_context *ctx, - struct gl_transform_feedback_object *obj) -{ - /* nop */ -} - -/** Default fallback for ctx->Driver.DrawTransformFeedback() */ -static void -draw_transform_feedback(struct gl_context *ctx, GLenum mode, - struct gl_transform_feedback_object *obj) -{ - /* XXX to do */ - /* - * Get number of vertices in obj's feedback buffer. - * Call ctx->Exec.DrawArrays(mode, 0, count); - */ -} - - -/** - * Plug in default device driver functions for transform feedback. - * Most drivers will override some/all of these. - */ -void -_mesa_init_transform_feedback_functions(struct dd_function_table *driver) -{ - driver->NewTransformFeedback = new_transform_feedback; - driver->DeleteTransformFeedback = delete_transform_feedback; - driver->BeginTransformFeedback = begin_transform_feedback; - driver->EndTransformFeedback = end_transform_feedback; - driver->PauseTransformFeedback = pause_transform_feedback; - driver->ResumeTransformFeedback = resume_transform_feedback; - driver->DrawTransformFeedback = draw_transform_feedback; -} - - -void -_mesa_init_transform_feedback_dispatch(struct _glapi_table *disp) -{ - SET_BeginTransformFeedbackEXT(disp, _mesa_BeginTransformFeedback); - SET_EndTransformFeedbackEXT(disp, _mesa_EndTransformFeedback); - SET_BindBufferRangeEXT(disp, _mesa_BindBufferRange); - SET_BindBufferBaseEXT(disp, _mesa_BindBufferBase); - SET_BindBufferOffsetEXT(disp, _mesa_BindBufferOffsetEXT); - SET_TransformFeedbackVaryingsEXT(disp, _mesa_TransformFeedbackVaryings); - SET_GetTransformFeedbackVaryingEXT(disp, _mesa_GetTransformFeedbackVarying); -} - - -/** - ** Begin API functions - **/ - - -void GLAPIENTRY -_mesa_BeginTransformFeedback(GLenum mode) -{ - struct gl_transform_feedback_object *obj; - GET_CURRENT_CONTEXT(ctx); - - obj = ctx->TransformFeedback.CurrentObject; - - switch (mode) { - case GL_POINTS: - case GL_LINES: - case GL_TRIANGLES: - /* legal */ - break; - default: - _mesa_error(ctx, GL_INVALID_ENUM, "glBeginTransformFeedback(mode)"); - return; - } - - if (obj->Active) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glBeginTransformFeedback(already active)"); - return; - } - - obj->Active = GL_TRUE; - ctx->TransformFeedback.Mode = mode; - - assert(ctx->Driver.BeginTransformFeedback); - ctx->Driver.BeginTransformFeedback(ctx, mode, obj); -} - - -void GLAPIENTRY -_mesa_EndTransformFeedback(void) -{ - struct gl_transform_feedback_object *obj; - GET_CURRENT_CONTEXT(ctx); - - obj = ctx->TransformFeedback.CurrentObject; - - if (!obj->Active) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glEndTransformFeedback(not active)"); - return; - } - - ctx->TransformFeedback.CurrentObject->Active = GL_FALSE; - - assert(ctx->Driver.EndTransformFeedback); - ctx->Driver.EndTransformFeedback(ctx, obj); -} - - -/** - * Helper used by BindBufferRange() and BindBufferBase(). - */ -static void -bind_buffer_range(struct gl_context *ctx, GLuint index, - struct gl_buffer_object *bufObj, - GLintptr offset, GLsizeiptr size) -{ - struct gl_transform_feedback_object *obj = - ctx->TransformFeedback.CurrentObject; - - /* The general binding point */ - _mesa_reference_buffer_object(ctx, - &ctx->TransformFeedback.CurrentBuffer, - bufObj); - - /* The per-attribute binding point */ - _mesa_reference_buffer_object(ctx, - &obj->Buffers[index], - bufObj); - - obj->BufferNames[index] = bufObj->Name; - - obj->Offset[index] = offset; - obj->Size[index] = size; -} - - -/** - * Specify a buffer object to receive vertex shader results. Plus, - * specify the starting offset to place the results, and max size. - */ -void GLAPIENTRY -_mesa_BindBufferRange(GLenum target, GLuint index, - GLuint buffer, GLintptr offset, GLsizeiptr size) -{ - struct gl_transform_feedback_object *obj; - struct gl_buffer_object *bufObj; - GET_CURRENT_CONTEXT(ctx); - - if (target != GL_TRANSFORM_FEEDBACK_BUFFER) { - _mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferRange(target)"); - return; - } - - obj = ctx->TransformFeedback.CurrentObject; - - if (obj->Active) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glBindBufferRange(transform feedback active)"); - return; - } - - if (index >= ctx->Const.MaxTransformFeedbackSeparateAttribs) { - _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(index=%d)", index); - return; - } - - if ((size <= 0) || (size & 0x3)) { - /* must be positive and multiple of four */ - _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(size%d)", (int) size); - return; - } - - if (offset & 0x3) { - /* must be multiple of four */ - _mesa_error(ctx, GL_INVALID_VALUE, - "glBindBufferRange(offset=%d)", (int) offset); - return; - } - - bufObj = _mesa_lookup_bufferobj(ctx, buffer); - if (!bufObj) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glBindBufferRange(invalid buffer=%u)", buffer); - return; - } - - if (offset + size >= bufObj->Size) { - _mesa_error(ctx, GL_INVALID_VALUE, - "glBindBufferRange(offset + size %d > buffer size %d)", - (int) (offset + size), (int) (bufObj->Size)); - return; - } - - bind_buffer_range(ctx, index, bufObj, offset, size); -} - - -/** - * Specify a buffer object to receive vertex shader results. - * As above, but start at offset = 0. - */ -void GLAPIENTRY -_mesa_BindBufferBase(GLenum target, GLuint index, GLuint buffer) -{ - struct gl_transform_feedback_object *obj; - struct gl_buffer_object *bufObj; - GLsizeiptr size; - GET_CURRENT_CONTEXT(ctx); - - if (target != GL_TRANSFORM_FEEDBACK_BUFFER) { - _mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferBase(target)"); - return; - } - - obj = ctx->TransformFeedback.CurrentObject; - - if (obj->Active) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glBindBufferRange(transform feedback active)"); - return; - } - - if (index >= ctx->Const.MaxTransformFeedbackSeparateAttribs) { - _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferBase(index=%d)", index); - return; - } - - bufObj = _mesa_lookup_bufferobj(ctx, buffer); - if (!bufObj) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glBindBufferBase(invalid buffer=%u)", buffer); - return; - } - - /* default size is the buffer size rounded down to nearest - * multiple of four. - */ - size = bufObj->Size & ~0x3; - - bind_buffer_range(ctx, index, bufObj, 0, size); -} - - -/** - * Specify a buffer object to receive vertex shader results, plus the - * offset in the buffer to start placing results. - * This function is part of GL_EXT_transform_feedback, but not GL3. - */ -void GLAPIENTRY -_mesa_BindBufferOffsetEXT(GLenum target, GLuint index, GLuint buffer, - GLintptr offset) -{ - struct gl_transform_feedback_object *obj; - struct gl_buffer_object *bufObj; - GET_CURRENT_CONTEXT(ctx); - GLsizeiptr size; - - if (target != GL_TRANSFORM_FEEDBACK_BUFFER) { - _mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferOffsetEXT(target)"); - return; - } - - obj = ctx->TransformFeedback.CurrentObject; - - if (obj->Active) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glBindBufferRange(transform feedback active)"); - return; - } - - if (index >= ctx->Const.MaxTransformFeedbackSeparateAttribs) { - _mesa_error(ctx, GL_INVALID_VALUE, - "glBindBufferOffsetEXT(index=%d)", index); - return; - } - - bufObj = _mesa_lookup_bufferobj(ctx, buffer); - if (!bufObj) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glBindBufferOffsetEXT(invalid buffer=%u)", buffer); - return; - } - - /* default size is the buffer size rounded down to nearest - * multiple of four. - */ - size = (bufObj->Size - offset) & ~0x3; - - bind_buffer_range(ctx, index, bufObj, offset, size); -} - - -/** - * This function specifies the vertex shader outputs to be written - * to the feedback buffer(s), and in what order. - */ -void GLAPIENTRY -_mesa_TransformFeedbackVaryings(GLuint program, GLsizei count, - const GLchar **varyings, GLenum bufferMode) -{ - struct gl_shader_program *shProg; - GLuint i; - GET_CURRENT_CONTEXT(ctx); - - switch (bufferMode) { - case GL_INTERLEAVED_ATTRIBS: - break; - case GL_SEPARATE_ATTRIBS: - break; - default: - _mesa_error(ctx, GL_INVALID_ENUM, - "glTransformFeedbackVaryings(bufferMode)"); - return; - } - - if (count < 0 || count > ctx->Const.MaxTransformFeedbackSeparateAttribs) { - _mesa_error(ctx, GL_INVALID_VALUE, - "glTransformFeedbackVaryings(count=%d)", count); - return; - } - - shProg = _mesa_lookup_shader_program(ctx, program); - if (!shProg) { - _mesa_error(ctx, GL_INVALID_VALUE, - "glTransformFeedbackVaryings(program=%u)", program); - return; - } - - /* free existing varyings, if any */ - for (i = 0; i < shProg->TransformFeedback.NumVarying; i++) { - free(shProg->TransformFeedback.VaryingNames[i]); - } - free(shProg->TransformFeedback.VaryingNames); - - /* allocate new memory for varying names */ - shProg->TransformFeedback.VaryingNames = - (GLchar **) malloc(count * sizeof(GLchar *)); - - if (!shProg->TransformFeedback.VaryingNames) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTransformFeedbackVaryings()"); - return; - } - - /* Save the new names and the count */ - for (i = 0; i < (GLuint) count; i++) { - shProg->TransformFeedback.VaryingNames[i] = _mesa_strdup(varyings[i]); - } - shProg->TransformFeedback.NumVarying = count; - - shProg->TransformFeedback.BufferMode = bufferMode; - - /* The varyings won't be used until shader link time */ -} - - -/** - * Get info about the vertex shader's outputs which are to be written - * to the feedback buffer(s). - */ -void GLAPIENTRY -_mesa_GetTransformFeedbackVarying(GLuint program, GLuint index, - GLsizei bufSize, GLsizei *length, - GLsizei *size, GLenum *type, GLchar *name) -{ - const struct gl_shader_program *shProg; - const GLchar *varyingName; - GLint v; - GET_CURRENT_CONTEXT(ctx); - - shProg = _mesa_lookup_shader_program(ctx, program); - if (!shProg) { - _mesa_error(ctx, GL_INVALID_VALUE, - "glGetTransformFeedbackVaryings(program=%u)", program); - return; - } - - if (index >= shProg->TransformFeedback.NumVarying) { - _mesa_error(ctx, GL_INVALID_VALUE, - "glGetTransformFeedbackVaryings(index=%u)", index); - return; - } - - varyingName = shProg->TransformFeedback.VaryingNames[index]; - - v = _mesa_lookup_parameter_index(shProg->Varying, -1, varyingName); - if (v >= 0) { - struct gl_program_parameter *param = &shProg->Varying->Parameters[v]; - - /* return the varying's name and length */ - _mesa_copy_string(name, bufSize, length, varyingName); - - /* return the datatype and value's size (in datatype units) */ - if (type) - *type = param->DataType; - if (size) - *size = param->Size; - } - else { - name[0] = 0; - if (length) - *length = 0; - if (type) - *type = 0; - if (size) - *size = 0; - } -} - - - -static struct gl_transform_feedback_object * -lookup_transform_feedback_object(struct gl_context *ctx, GLuint name) -{ - if (name == 0) { - return ctx->TransformFeedback.DefaultObject; - } - else - return (struct gl_transform_feedback_object *) - _mesa_HashLookup(ctx->TransformFeedback.Objects, name); -} - - -/** - * Create new transform feedback objects. Transform feedback objects - * encapsulate the state related to transform feedback to allow quickly - * switching state (and drawing the results, below). - * Part of GL_ARB_transform_feedback2. - */ -void GLAPIENTRY -_mesa_GenTransformFeedbacks(GLsizei n, GLuint *names) -{ - GLuint first; - GET_CURRENT_CONTEXT(ctx); - - ASSERT_OUTSIDE_BEGIN_END(ctx); - - if (n < 0) { - _mesa_error(ctx, GL_INVALID_VALUE, "glGenTransformFeedbacks(n < 0)"); - return; - } - - if (!names) - return; - - /* we don't need contiguous IDs, but this might be faster */ - first = _mesa_HashFindFreeKeyBlock(ctx->TransformFeedback.Objects, n); - if (first) { - GLsizei i; - for (i = 0; i < n; i++) { - struct gl_transform_feedback_object *obj - = ctx->Driver.NewTransformFeedback(ctx, first + i); - if (!obj) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGenTransformFeedbacks"); - return; - } - names[i] = first + i; - _mesa_HashInsert(ctx->TransformFeedback.Objects, first + i, obj); - } - } - else { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGenTransformFeedbacks"); - } -} - - -/** - * Is the given ID a transform feedback object? - * Part of GL_ARB_transform_feedback2. - */ -GLboolean GLAPIENTRY -_mesa_IsTransformFeedback(GLuint name) -{ - GET_CURRENT_CONTEXT(ctx); - - ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE); - - if (name && lookup_transform_feedback_object(ctx, name)) - return GL_TRUE; - else - return GL_FALSE; -} - - -/** - * Bind the given transform feedback object. - * Part of GL_ARB_transform_feedback2. - */ -void GLAPIENTRY -_mesa_BindTransformFeedback(GLenum target, GLuint name) -{ - struct gl_transform_feedback_object *obj; - GET_CURRENT_CONTEXT(ctx); - - if (target != GL_TRANSFORM_FEEDBACK) { - _mesa_error(ctx, GL_INVALID_ENUM, "glBindTransformFeedback(target)"); - return; - } - - if (ctx->TransformFeedback.CurrentObject->Active && - !ctx->TransformFeedback.CurrentObject->Paused) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glBindTransformFeedback(transform is active, or not paused)"); - return; - } - - obj = lookup_transform_feedback_object(ctx, name); - if (!obj) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glBindTransformFeedback(name=%u)", name); - return; - } - - reference_transform_feedback_object(&ctx->TransformFeedback.CurrentObject, - obj); -} - - -/** - * Delete the given transform feedback objects. - * Part of GL_ARB_transform_feedback2. - */ -void GLAPIENTRY -_mesa_DeleteTransformFeedbacks(GLsizei n, const GLuint *names) -{ - GLint i; - GET_CURRENT_CONTEXT(ctx); - - ASSERT_OUTSIDE_BEGIN_END(ctx); - - if (n < 0) { - _mesa_error(ctx, GL_INVALID_VALUE, "glDeleteTransformFeedbacks(n < 0)"); - return; - } - - if (!names) - return; - - for (i = 0; i < n; i++) { - if (names[i] > 0) { - struct gl_transform_feedback_object *obj - = lookup_transform_feedback_object(ctx, names[i]); - if (obj) { - if (obj->Active) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glDeleteTransformFeedbacks(object %u is active)", - names[i]); - return; - } - _mesa_HashRemove(ctx->TransformFeedback.Objects, names[i]); - /* unref, but object may not be deleted until later */ - reference_transform_feedback_object(&obj, NULL); - } - } - } -} - - -/** - * Pause transform feedback. - * Part of GL_ARB_transform_feedback2. - */ -void GLAPIENTRY -_mesa_PauseTransformFeedback(void) -{ - struct gl_transform_feedback_object *obj; - GET_CURRENT_CONTEXT(ctx); - - obj = ctx->TransformFeedback.CurrentObject; - - if (!obj->Active || obj->Paused) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glPauseTransformFeedback(feedback not active or already paused)"); - return; - } - - obj->Paused = GL_TRUE; - - assert(ctx->Driver.PauseTransformFeedback); - ctx->Driver.PauseTransformFeedback(ctx, obj); -} - - -/** - * Resume transform feedback. - * Part of GL_ARB_transform_feedback2. - */ -void GLAPIENTRY -_mesa_ResumeTransformFeedback(void) -{ - struct gl_transform_feedback_object *obj; - GET_CURRENT_CONTEXT(ctx); - - obj = ctx->TransformFeedback.CurrentObject; - - if (!obj->Active || !obj->Paused) { - _mesa_error(ctx, GL_INVALID_OPERATION, - "glPauseTransformFeedback(feedback not active or not paused)"); - return; - } - - obj->Paused = GL_FALSE; - - assert(ctx->Driver.ResumeTransformFeedback); - ctx->Driver.ResumeTransformFeedback(ctx, obj); -} - - -/** - * Draw the vertex data in a transform feedback object. - * \param mode GL_POINTS, GL_LINES, GL_TRIANGLE_STRIP, etc. - * \param name the transform feedback object - * The number of vertices comes from the transform feedback object. - * User still has to setup of the vertex attribute info with - * glVertexPointer, glColorPointer, etc. - * Part of GL_ARB_transform_feedback2. - */ -void GLAPIENTRY -_mesa_DrawTransformFeedback(GLenum mode, GLuint name) -{ - GET_CURRENT_CONTEXT(ctx); - struct gl_transform_feedback_object *obj = - lookup_transform_feedback_object(ctx, name); - - if (mode > GL_POLYGON) { - _mesa_error(ctx, GL_INVALID_ENUM, - "glDrawTransformFeedback(mode=0x%x)", mode); - return; - } - if (!obj) { - _mesa_error(ctx, GL_INVALID_VALUE, - "glDrawTransformFeedback(name = %u)", name); - return; - } - - /* XXX check if EndTransformFeedback has never been called while - * the object was bound - */ - - assert(ctx->Driver.DrawTransformFeedback); - ctx->Driver.DrawTransformFeedback(ctx, mode, obj); -} - - -/* -XXX misc to do: - -glGet*() for - -GL_TRANSFORM_FEEDBACK_BUFFER_PAUSED -GL_TRANSFORM_FEEDBACK_BUFFER_ACTIVE -GL_TRANSFORM_FEEDBACK_BINDING -*/ - - -#endif /* FEATURE_EXT_transform_feedback */ |