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Diffstat (limited to 'src/mesa/main/bufferobj.c')
| -rw-r--r-- | src/mesa/main/bufferobj.c | 943 |
1 files changed, 943 insertions, 0 deletions
diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c new file mode 100644 index 00000000000..03aec367c43 --- /dev/null +++ b/src/mesa/main/bufferobj.c @@ -0,0 +1,943 @@ +/* + * Mesa 3-D graphics library + * Version: 6.3 + * + * Copyright (C) 1999-2004 Brian Paul 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 + * 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. + */ + + +/** + * \file bufferobj.c + * \brief Functions for the GL_ARB_vertex_buffer_object extension. + * \author Brian Paul, Ian Romanick + */ + + +#include "glheader.h" +#include "hash.h" +#include "imports.h" +#include "image.h" +#include "context.h" +#include "bufferobj.h" + + +/** + * Get the buffer object bound to the specified target in a GL context. + * + * \param ctx GL context + * \param target Buffer object target to be retrieved. Currently this must + * be either \c GL_ARRAY_BUFFER or \c GL_ELEMENT_ARRAY_BUFFER. + * \param str Name of caller for logging errors. + * \return A pointer to the buffer object bound to \c target in the + * specified context or \c NULL if \c target is invalid or no + * buffer object is bound. + */ +static INLINE struct gl_buffer_object * +buffer_object_get_target( GLcontext *ctx, GLenum target, const char * str ) +{ + struct gl_buffer_object * bufObj = NULL; + + switch (target) { + case GL_ARRAY_BUFFER_ARB: + bufObj = ctx->Array.ArrayBufferObj; + break; + case GL_ELEMENT_ARRAY_BUFFER_ARB: + bufObj = ctx->Array.ElementArrayBufferObj; + break; + case GL_PIXEL_PACK_BUFFER_EXT: + bufObj = ctx->Pack.BufferObj; + break; + case GL_PIXEL_UNPACK_BUFFER_EXT: + bufObj = ctx->Unpack.BufferObj; + break; + default: + _mesa_error(ctx, GL_INVALID_ENUM, "gl%s(target)", str); + return NULL; + } + + if (bufObj->Name == 0) + return NULL; + + return bufObj; +} + + +/** + * Tests the subdata range parameters and sets the GL error code for + * \c glBufferSubDataARB and \c glGetBufferSubDataARB. + * + * \param ctx GL context. + * \param target Buffer object target on which to operate. + * \param offset Offset of the first byte of the subdata range. + * \param size Size, in bytes, of the subdata range. + * \param str Name of caller for logging errors. + * \return A pointer to the buffer object bound to \c target in the + * specified context or \c NULL if any of the parameter or state + * conditions for \c glBufferSubDataARB or \c glGetBufferSubDataARB + * are invalid. + * + * \sa glBufferSubDataARB, glGetBufferSubDataARB + */ +static struct gl_buffer_object * +buffer_object_subdata_range_good( GLcontext * ctx, GLenum target, + GLintptrARB offset, GLsizeiptrARB size, + const char * str ) +{ + struct gl_buffer_object *bufObj; + + if (size < 0) { + _mesa_error(ctx, GL_INVALID_VALUE, "%s(size < 0)", str); + return NULL; + } + + if (offset < 0) { + _mesa_error(ctx, GL_INVALID_VALUE, "%s(offset < 0)", str); + return NULL; + } + + bufObj = buffer_object_get_target( ctx, target, str ); + if (!bufObj || bufObj->Name == 0) { + return NULL; + } + + if ((GLuint) (offset + size) > bufObj->Size) { + _mesa_error(ctx, GL_INVALID_VALUE, + "%s(size + offset > buffer size)", str); + return NULL; + } + + if (bufObj->Pointer) { + /* Buffer is currently mapped */ + _mesa_error(ctx, GL_INVALID_OPERATION, "%s", str); + return NULL; + } + + return bufObj; +} + + +/** + * Allocate and initialize a new buffer object. + * + * This function is intended to be called via + * \c dd_function_table::NewBufferObject. + */ +struct gl_buffer_object * +_mesa_new_buffer_object( GLcontext *ctx, GLuint name, GLenum target ) +{ + struct gl_buffer_object *obj; + + (void) ctx; + + obj = MALLOC_STRUCT(gl_buffer_object); + _mesa_initialize_buffer_object(obj, name, target); + return obj; +} + + +/** + * Delete a buffer object. + * + * This function is intended to be called via + * \c dd_function_table::DeleteBuffer. + */ +void +_mesa_delete_buffer_object( GLcontext *ctx, struct gl_buffer_object *bufObj ) +{ + (void) ctx; + + if (bufObj->Data) + _mesa_free(bufObj->Data); + _mesa_free(bufObj); +} + + +/** + * Initialize a buffer object to default values. + */ +void +_mesa_initialize_buffer_object( struct gl_buffer_object *obj, + GLuint name, GLenum target ) +{ + (void) target; + + _mesa_bzero(obj, sizeof(struct gl_buffer_object)); + obj->RefCount = 1; + obj->Name = name; + obj->Usage = GL_STATIC_DRAW_ARB; + obj->Access = GL_READ_WRITE_ARB; +} + + +/** + * Add the given buffer object to the buffer object pool. + */ +void +_mesa_save_buffer_object( GLcontext *ctx, struct gl_buffer_object *obj ) +{ + if (obj->Name > 0) { + /* insert into hash table */ + _mesa_HashInsert(ctx->Shared->BufferObjects, obj->Name, obj); + } +} + + +/** + * Remove the given buffer object from the buffer object pool. + * Do not deallocate the buffer object though. + */ +void +_mesa_remove_buffer_object( GLcontext *ctx, struct gl_buffer_object *bufObj ) +{ + if (bufObj->Name > 0) { + /* remove from hash table */ + _mesa_HashRemove(ctx->Shared->BufferObjects, bufObj->Name); + } +} + + +/** + * Allocate space for and store data in a buffer object. Any data that was + * previously stored in the buffer object is lost. If \c data is \c NULL, + * memory will be allocated, but no copy will occur. + * + * This function is intended to be called via + * \c dd_function_table::BufferData. This function need not set GL error + * codes. The input parameters will have been tested before calling. + * + * \param ctx GL context. + * \param target Buffer object target on which to operate. + * \param size Size, in bytes, of the new data store. + * \param data Pointer to the data to store in the buffer object. This + * pointer may be \c NULL. + * \param usage Hints about how the data will be used. + * \param bufObj Object to be used. + * + * \sa glBufferDataARB, dd_function_table::BufferData. + */ +void +_mesa_buffer_data( GLcontext *ctx, GLenum target, GLsizeiptrARB size, + const GLvoid * data, GLenum usage, + struct gl_buffer_object * bufObj ) +{ + void * new_data; + + (void) ctx; (void) target; + + new_data = _mesa_realloc( bufObj->Data, bufObj->Size, size ); + if (new_data) { + bufObj->Data = (GLubyte *) new_data; + bufObj->Size = size; + bufObj->Usage = usage; + + if (data) { + _mesa_memcpy( bufObj->Data, data, size ); + } + } +} + + +/** + * Replace data in a subrange of buffer object. If the data range + * specified by \c size + \c offset extends beyond the end of the buffer or + * if \c data is \c NULL, no copy is performed. + * + * This function is intended to be called by + * \c dd_function_table::BufferSubData. This function need not set GL error + * codes. The input parameters will have been tested before calling. + * + * \param ctx GL context. + * \param target Buffer object target on which to operate. + * \param offset Offset of the first byte to be modified. + * \param size Size, in bytes, of the data range. + * \param data Pointer to the data to store in the buffer object. + * \param bufObj Object to be used. + * + * \sa glBufferSubDataARB, dd_function_table::BufferSubData. + */ +void +_mesa_buffer_subdata( GLcontext *ctx, GLenum target, GLintptrARB offset, + GLsizeiptrARB size, const GLvoid * data, + struct gl_buffer_object * bufObj ) +{ + (void) ctx; (void) target; + + if (bufObj->Data && ((GLuint) (size + offset) <= bufObj->Size)) { + _mesa_memcpy( (GLubyte *) bufObj->Data + offset, data, size ); + } +} + + +/** + * Retrieve data from a subrange of buffer object. If the data range + * specified by \c size + \c offset extends beyond the end of the buffer or + * if \c data is \c NULL, no copy is performed. + * + * This function is intended to be called by + * \c dd_function_table::BufferGetSubData. This function need not set GL error + * codes. The input parameters will have been tested before calling. + * + * \param ctx GL context. + * \param target Buffer object target on which to operate. + * \param offset Offset of the first byte to be modified. + * \param size Size, in bytes, of the data range. + * \param data Pointer to the data to store in the buffer object. + * \param bufObj Object to be used. + * + * \sa glBufferGetSubDataARB, dd_function_table::GetBufferSubData. + */ +void +_mesa_buffer_get_subdata( GLcontext *ctx, GLenum target, GLintptrARB offset, + GLsizeiptrARB size, GLvoid * data, + struct gl_buffer_object * bufObj ) +{ + (void) ctx; (void) target; + + if (bufObj->Data && ((GLsizeiptrARB) (size + offset) <= bufObj->Size)) { + _mesa_memcpy( data, (GLubyte *) bufObj->Data + offset, size ); + } +} + + +/** + * Fallback function called via ctx->Driver.MapBuffer(). + * Hardware drivers that really implement buffer objects should never use + * function. + * + * The input parameters will have been already tested for errors. + * + * \param ctx GL context. + * \param target Buffer object target on which to operate. + * \param access Information about how the buffer will be accessed. + * \param bufObj Object to be mapped. + * \return A pointer to the object's internal data store that can be accessed + * by the processor + * + * \sa glMapBufferARB, dd_function_table::MapBuffer + */ +void * +_mesa_buffer_map( GLcontext *ctx, GLenum target, GLenum access, + struct gl_buffer_object *bufObj ) +{ + (void) ctx; + (void) target; + (void) access; + ASSERT(!bufObj->OnCard); + /* Just return a direct pointer to the data */ + if (bufObj->Pointer) { + /* already mapped! */ + return NULL; + } + bufObj->Pointer = bufObj->Data; + return bufObj->Pointer; +} + + +/** + * Fallback function called via ctx->Driver.MapBuffer(). + * Hardware drivers that really implement buffer objects should never use + * function. + * + * The input parameters will have been already tested for errors. + * + * \sa glUnmapBufferARB, dd_function_table::UnmapBuffer + */ +GLboolean +_mesa_buffer_unmap( GLcontext *ctx, GLenum target, + struct gl_buffer_object *bufObj ) +{ + (void) ctx; + (void) target; + ASSERT(!bufObj->OnCard); + /* XXX we might assert here that bufObj->Pointer is non-null */ + bufObj->Pointer = NULL; + return GL_TRUE; +} + + +/** + * Initialize the state associated with buffer objects + */ +void +_mesa_init_buffer_objects( GLcontext *ctx ) +{ + GLuint i; + + /* Allocate the default buffer object and set refcount so high that + * it never gets deleted. + */ + ctx->Array.NullBufferObj = _mesa_new_buffer_object(ctx, 0, 0); + if (ctx->Array.NullBufferObj) + ctx->Array.NullBufferObj->RefCount = 1000; + + ctx->Array.ArrayBufferObj = ctx->Array.NullBufferObj; + ctx->Array.ElementArrayBufferObj = ctx->Array.NullBufferObj; + + /* Vertex array buffers */ + ctx->Array.Vertex.BufferObj = ctx->Array.NullBufferObj; + ctx->Array.Normal.BufferObj = ctx->Array.NullBufferObj; + ctx->Array.Color.BufferObj = ctx->Array.NullBufferObj; + ctx->Array.SecondaryColor.BufferObj = ctx->Array.NullBufferObj; + ctx->Array.FogCoord.BufferObj = ctx->Array.NullBufferObj; + ctx->Array.Index.BufferObj = ctx->Array.NullBufferObj; + for (i = 0; i < MAX_TEXTURE_UNITS; i++) { + ctx->Array.TexCoord[i].BufferObj = ctx->Array.NullBufferObj; + } + ctx->Array.EdgeFlag.BufferObj = ctx->Array.NullBufferObj; + for (i = 0; i < VERT_ATTRIB_MAX; i++) { + ctx->Array.VertexAttrib[i].BufferObj = ctx->Array.NullBufferObj; + } +} + + +/** + * When we're about to read pixel data out of a PBO (via glDrawPixels, + * glTexImage, etc) or write data into a PBO (via glReadPixels, + * glGetTexImage, etc) we call this function to check that we're not + * going to read out of bounds. + * + * XXX This would also be a convenient time to check that the PBO isn't + * currently mapped. Whoever calls this function should check for that. + * Remember, we can't use a PBO when it's mapped! + * + * \param width width of image to read/write + * \param height height of image to read/write + * \param depth depth of image to read/write + * \param format format of image to read/write + * \param type datatype of image to read/write + * \param ptr the user-provided pointer/offset + * \return GL_TRUE if the PBO access is OK, GL_FALSE if the access would + * go out of bounds. + */ +GLboolean +_mesa_validate_pbo_access(GLuint dimensions, + const struct gl_pixelstore_attrib *pack, + GLsizei width, GLsizei height, GLsizei depth, + GLenum format, GLenum type, const GLvoid *ptr) +{ + GLvoid *start, *end; + const GLubyte *sizeAddr; /* buffer size, cast to a pointer */ + + ASSERT(pack->BufferObj->Name != 0); + + if (pack->BufferObj->Size == 0) + /* no buffer! */ + return GL_FALSE; + + /* get address of first pixel we'll read */ + start = _mesa_image_address(dimensions, pack, ptr, width, height, + format, type, 0, 0, 0); + + /* get address just past the last pixel we'll read */ + end = _mesa_image_address(dimensions, pack, ptr, width, height, + format, type, depth-1, height-1, width); + + + sizeAddr = ((const GLubyte *) 0) + pack->BufferObj->Size; + + if ((const GLubyte *) start > sizeAddr) { + /* This will catch negative values / wrap-around */ + return GL_FALSE; + } + if ((const GLubyte *) end > sizeAddr) { + /* Image read goes beyond end of buffer */ + return GL_FALSE; + } + + /* OK! */ + return GL_TRUE; +} + + + + +/**********************************************************************/ +/* API Functions */ +/**********************************************************************/ + +void GLAPIENTRY +_mesa_BindBufferARB(GLenum target, GLuint buffer) +{ + GET_CURRENT_CONTEXT(ctx); + struct gl_buffer_object *oldBufObj; + struct gl_buffer_object *newBufObj = NULL; + ASSERT_OUTSIDE_BEGIN_END(ctx); + + oldBufObj = buffer_object_get_target( ctx, target, "BindBufferARB" ); + if (oldBufObj && oldBufObj->Name == buffer) + return; /* rebinding the same buffer object- no change */ + + /* + * Get pointer to new buffer object (newBufObj) + */ + if (buffer == 0) { + /* The spec says there's not a buffer object named 0, but we use + * one internally because it simplifies things. + */ + newBufObj = ctx->Array.NullBufferObj; + } + else { + /* non-default buffer object */ + const struct _mesa_HashTable *hash = ctx->Shared->BufferObjects; + newBufObj = (struct gl_buffer_object *) _mesa_HashLookup(hash, buffer); + if (!newBufObj) { + /* if this is a new buffer object id, allocate a buffer object now */ + newBufObj = (*ctx->Driver.NewBufferObject)(ctx, buffer, target); + if (!newBufObj) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindBufferARB"); + return; + } + _mesa_save_buffer_object(ctx, newBufObj); + } + newBufObj->RefCount++; + } + + switch (target) { + case GL_ARRAY_BUFFER_ARB: + ctx->Array.ArrayBufferObj = newBufObj; + break; + case GL_ELEMENT_ARRAY_BUFFER_ARB: + ctx->Array.ElementArrayBufferObj = newBufObj; + break; + case GL_PIXEL_PACK_BUFFER_EXT: + ctx->Pack.BufferObj = newBufObj; + break; + case GL_PIXEL_UNPACK_BUFFER_EXT: + ctx->Unpack.BufferObj = newBufObj; + break; + default: + _mesa_problem(ctx, "Bad target in _mesa_BindBufferARB"); + return; + } + + /* Pass BindBuffer call to device driver */ + if (ctx->Driver.BindBuffer && newBufObj) + (*ctx->Driver.BindBuffer)( ctx, target, newBufObj ); + + if (oldBufObj) { + oldBufObj->RefCount--; + assert(oldBufObj->RefCount >= 0); + if (oldBufObj->RefCount == 0) { + assert(oldBufObj->Name != 0); + ASSERT(ctx->Driver.DeleteBuffer); + ctx->Driver.DeleteBuffer( ctx, oldBufObj ); + } + } +} + + +/** + * Delete a set of buffer objects. + * + * \param n Number of buffer objects to delete. + * \param ids Array of \c n buffer object IDs. + */ +void GLAPIENTRY +_mesa_DeleteBuffersARB(GLsizei n, const GLuint *ids) +{ + GET_CURRENT_CONTEXT(ctx); + GLsizei i; + ASSERT_OUTSIDE_BEGIN_END(ctx); + + if (n < 0) { + _mesa_error(ctx, GL_INVALID_VALUE, "glDeleteBuffersARB(n)"); + return; + } + + _glthread_LOCK_MUTEX(ctx->Shared->Mutex); + + for (i = 0; i < n; i++) { + if (ids[i] != 0) { + struct gl_buffer_object *bufObj = (struct gl_buffer_object *) + _mesa_HashLookup(ctx->Shared->BufferObjects, ids[i]); + if (bufObj) { + /* unbind any vertex pointers bound to this buffer */ + GLuint j; + + ASSERT(bufObj->Name == ids[i]); + + if (ctx->Array.Vertex.BufferObj == bufObj) { + bufObj->RefCount--; + ctx->Array.Vertex.BufferObj = ctx->Array.NullBufferObj; + ctx->Array.NullBufferObj->RefCount++; + } + if (ctx->Array.Normal.BufferObj == bufObj) { + bufObj->RefCount--; + ctx->Array.Normal.BufferObj = ctx->Array.NullBufferObj; + ctx->Array.NullBufferObj->RefCount++; + } + if (ctx->Array.Color.BufferObj == bufObj) { + bufObj->RefCount--; + ctx->Array.Color.BufferObj = ctx->Array.NullBufferObj; + ctx->Array.NullBufferObj->RefCount++; + } + if (ctx->Array.SecondaryColor.BufferObj == bufObj) { + bufObj->RefCount--; + ctx->Array.SecondaryColor.BufferObj = ctx->Array.NullBufferObj; + ctx->Array.NullBufferObj->RefCount++; + } + if (ctx->Array.FogCoord.BufferObj == bufObj) { + bufObj->RefCount--; + ctx->Array.FogCoord.BufferObj = ctx->Array.NullBufferObj; + ctx->Array.NullBufferObj->RefCount++; + } + if (ctx->Array.Index.BufferObj == bufObj) { + bufObj->RefCount--; + ctx->Array.Index.BufferObj = ctx->Array.NullBufferObj; + ctx->Array.NullBufferObj->RefCount++; + } + if (ctx->Array.EdgeFlag.BufferObj == bufObj) { + bufObj->RefCount--; + ctx->Array.EdgeFlag.BufferObj = ctx->Array.NullBufferObj; + ctx->Array.NullBufferObj->RefCount++; + } + for (j = 0; j < MAX_TEXTURE_UNITS; j++) { + if (ctx->Array.TexCoord[j].BufferObj == bufObj) { + bufObj->RefCount--; + ctx->Array.TexCoord[j].BufferObj = ctx->Array.NullBufferObj; + ctx->Array.NullBufferObj->RefCount++; + } + } + for (j = 0; j < VERT_ATTRIB_MAX; j++) { + if (ctx->Array.VertexAttrib[j].BufferObj == bufObj) { + bufObj->RefCount--; + ctx->Array.VertexAttrib[j].BufferObj = ctx->Array.NullBufferObj; + ctx->Array.NullBufferObj->RefCount++; + } + } + + if (ctx->Array.ArrayBufferObj == bufObj) { + _mesa_BindBufferARB( GL_ARRAY_BUFFER_ARB, 0 ); + } + if (ctx->Array.ElementArrayBufferObj == bufObj) { + _mesa_BindBufferARB( GL_ELEMENT_ARRAY_BUFFER_ARB, 0 ); + } + + if (ctx->Pack.BufferObj == bufObj) { + _mesa_BindBufferARB( GL_PIXEL_PACK_BUFFER_EXT, 0 ); + } + if (ctx->Unpack.BufferObj == bufObj) { + _mesa_BindBufferARB( GL_PIXEL_UNPACK_BUFFER_EXT, 0 ); + } + + /* The ID is immediately freed for re-use */ + _mesa_remove_buffer_object(ctx, bufObj); + bufObj->RefCount--; + if (bufObj->RefCount <= 0) { + ASSERT(ctx->Array.ArrayBufferObj != bufObj); + ASSERT(ctx->Array.ElementArrayBufferObj != bufObj); + ASSERT(ctx->Array.Vertex.BufferObj != bufObj); + ASSERT(ctx->Driver.DeleteBuffer); + ctx->Driver.DeleteBuffer(ctx, bufObj); + } + } + } + } + + _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex); +} + + +/** + * Generate a set of unique buffer object IDs and store them in \c buffer. + * + * \param n Number of IDs to generate. + * \param buffer Array of \c n locations to store the IDs. + */ +void GLAPIENTRY +_mesa_GenBuffersARB(GLsizei n, GLuint *buffer) +{ + GET_CURRENT_CONTEXT(ctx); + GLuint first; + GLint i; + ASSERT_OUTSIDE_BEGIN_END(ctx); + + if (n < 0) { + _mesa_error(ctx, GL_INVALID_VALUE, "glGenBuffersARB"); + return; + } + + if (!buffer) { + return; + } + + /* + * This must be atomic (generation and allocation of buffer object IDs) + */ + _glthread_LOCK_MUTEX(ctx->Shared->Mutex); + + first = _mesa_HashFindFreeKeyBlock(ctx->Shared->BufferObjects, n); + + /* Allocate new, empty buffer objects and return identifiers */ + for (i = 0; i < n; i++) { + struct gl_buffer_object *bufObj; + GLuint name = first + i; + GLenum target = 0; + bufObj = (*ctx->Driver.NewBufferObject)( ctx, name, target ); + if (!bufObj) { + _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex); + _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGenBuffersARB"); + return; + } + _mesa_save_buffer_object(ctx, bufObj); + buffer[i] = first + i; + } + + _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex); +} + + +/** + * Determine if ID is the name of a buffer object. + * + * \param id ID of the potential buffer object. + * \return \c GL_TRUE if \c id is the name of a buffer object, + * \c GL_FALSE otherwise. + */ +GLboolean GLAPIENTRY +_mesa_IsBufferARB(GLuint id) +{ + struct gl_buffer_object * bufObj; + GET_CURRENT_CONTEXT(ctx); + ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE); + + if (id == 0) + return GL_FALSE; + + _glthread_LOCK_MUTEX(ctx->Shared->Mutex); + bufObj = (struct gl_buffer_object *) _mesa_HashLookup(ctx->Shared->BufferObjects, id); + _glthread_UNLOCK_MUTEX(ctx->Shared->Mutex); + + return bufObj ? GL_TRUE : GL_FALSE; +} + + +void GLAPIENTRY +_mesa_BufferDataARB(GLenum target, GLsizeiptrARB size, + const GLvoid * data, GLenum usage) +{ + GET_CURRENT_CONTEXT(ctx); + struct gl_buffer_object *bufObj; + ASSERT_OUTSIDE_BEGIN_END(ctx); + + if (size < 0) { + _mesa_error(ctx, GL_INVALID_VALUE, "glBufferDataARB(size < 0)"); + return; + } + + switch (usage) { + case GL_STREAM_DRAW_ARB: + case GL_STREAM_READ_ARB: + case GL_STREAM_COPY_ARB: + case GL_STATIC_DRAW_ARB: + case GL_STATIC_READ_ARB: + case GL_STATIC_COPY_ARB: + case GL_DYNAMIC_DRAW_ARB: + case GL_DYNAMIC_READ_ARB: + case GL_DYNAMIC_COPY_ARB: + /* OK */ + break; + default: + _mesa_error(ctx, GL_INVALID_ENUM, "glBufferDataARB(usage)"); + return; + } + + bufObj = buffer_object_get_target( ctx, target, "BufferDataARB" ); + if (!bufObj || bufObj->Name ==0) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glBufferDataARB" ); + return; + } + + if (bufObj->Pointer) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glBufferDataARB(buffer is mapped)" ); + return; + } + + ASSERT(ctx->Driver.BufferData); + + /* Give the buffer object to the driver! <data> may be null! */ + (*ctx->Driver.BufferData)( ctx, target, size, data, usage, bufObj ); +} + + +void GLAPIENTRY +_mesa_BufferSubDataARB(GLenum target, GLintptrARB offset, + GLsizeiptrARB size, const GLvoid * data) +{ + GET_CURRENT_CONTEXT(ctx); + struct gl_buffer_object *bufObj; + ASSERT_OUTSIDE_BEGIN_END(ctx); + + bufObj = buffer_object_subdata_range_good( ctx, target, offset, size, + "BufferSubDataARB" ); + if (!bufObj) { + /* error already recorded */ + return; + } + + ASSERT(ctx->Driver.BufferSubData); + (*ctx->Driver.BufferSubData)( ctx, target, offset, size, data, bufObj ); +} + + +void GLAPIENTRY +_mesa_GetBufferSubDataARB(GLenum target, GLintptrARB offset, + GLsizeiptrARB size, void * data) +{ + GET_CURRENT_CONTEXT(ctx); + struct gl_buffer_object *bufObj; + ASSERT_OUTSIDE_BEGIN_END(ctx); + + bufObj = buffer_object_subdata_range_good( ctx, target, offset, size, + "GetBufferSubDataARB" ); + if (!bufObj) { + /* error already recorded */ + return; + } + + ASSERT(ctx->Driver.GetBufferSubData); + (*ctx->Driver.GetBufferSubData)( ctx, target, offset, size, data, bufObj ); +} + + +void * GLAPIENTRY +_mesa_MapBufferARB(GLenum target, GLenum access) +{ + GET_CURRENT_CONTEXT(ctx); + struct gl_buffer_object * bufObj; + ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL); + + switch (access) { + case GL_READ_ONLY_ARB: + case GL_WRITE_ONLY_ARB: + case GL_READ_WRITE_ARB: + /* OK */ + break; + default: + _mesa_error(ctx, GL_INVALID_ENUM, "glMapBufferARB(access)"); + return NULL; + } + + bufObj = buffer_object_get_target( ctx, target, "MapBufferARB" ); + if (!bufObj || bufObj->Name == 0) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glMapBufferARB" ); + return NULL; + } + + if (bufObj->Pointer) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glMapBufferARB(already mapped)"); + return NULL; + } + + ASSERT(ctx->Driver.MapBuffer); + bufObj->Pointer = (*ctx->Driver.MapBuffer)( ctx, target, access, bufObj ); + if (!bufObj->Pointer) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "glMapBufferARB(access)"); + } + + bufObj->Access = access; + + return bufObj->Pointer; +} + + +GLboolean GLAPIENTRY +_mesa_UnmapBufferARB(GLenum target) +{ + GET_CURRENT_CONTEXT(ctx); + struct gl_buffer_object *bufObj; + GLboolean status = GL_TRUE; + ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE); + + bufObj = buffer_object_get_target( ctx, target, "UnmapBufferARB" ); + if (!bufObj || bufObj->Name == 0) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glUnmapBufferARB" ); + return GL_FALSE; + } + + if (!bufObj->Pointer) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glUnmapBufferARB"); + return GL_FALSE; + } + + if (ctx->Driver.UnmapBuffer) { + status = (*ctx->Driver.UnmapBuffer)( ctx, target, bufObj ); + } + + bufObj->Access = GL_READ_WRITE_ARB; /* initial value, OK? */ + bufObj->Pointer = NULL; + + return status; +} + + +void GLAPIENTRY +_mesa_GetBufferParameterivARB(GLenum target, GLenum pname, GLint *params) +{ + GET_CURRENT_CONTEXT(ctx); + struct gl_buffer_object *bufObj; + ASSERT_OUTSIDE_BEGIN_END(ctx); + + bufObj = buffer_object_get_target( ctx, target, "GetBufferParameterivARB" ); + if (!bufObj || bufObj->Name == 0) { + _mesa_error(ctx, GL_INVALID_OPERATION, "GetBufferParameterivARB" ); + return; + } + + switch (pname) { + case GL_BUFFER_SIZE_ARB: + *params = (GLint) bufObj->Size; + break; + case GL_BUFFER_USAGE_ARB: + *params = bufObj->Usage; + break; + case GL_BUFFER_ACCESS_ARB: + *params = bufObj->Access; + break; + case GL_BUFFER_MAPPED_ARB: + *params = (bufObj->Pointer != NULL); + break; + default: + _mesa_error(ctx, GL_INVALID_ENUM, "glGetBufferParameterivARB(pname)"); + return; + } +} + + +void GLAPIENTRY +_mesa_GetBufferPointervARB(GLenum target, GLenum pname, GLvoid **params) +{ + GET_CURRENT_CONTEXT(ctx); + struct gl_buffer_object * bufObj; + ASSERT_OUTSIDE_BEGIN_END(ctx); + + if (pname != GL_BUFFER_MAP_POINTER_ARB) { + _mesa_error(ctx, GL_INVALID_ENUM, "glGetBufferPointervARB(pname)"); + return; + } + + bufObj = buffer_object_get_target( ctx, target, "GetBufferPointervARB" ); + if (!bufObj || bufObj->Name == 0) { + _mesa_error(ctx, GL_INVALID_OPERATION, "glGetBufferPointervARB" ); + return; + } + + *params = bufObj->Pointer; +} |