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// Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// A class to emluate GLES2 over command buffers.
#include "gpu/command_buffer/client/gles2_implementation.h"
// TODO(gman): remove when all functions have been implemented.
#include "gpu/command_buffer/client/gles2_implementation_gen.h"
#include "gpu/command_buffer/common/gles2_cmd_utils.h"
namespace command_buffer {
namespace gles2 {
GLES2Implementation::GLES2Implementation(
GLES2CmdHelper* helper,
void* transfer_buffer,
int transfer_buffer_id)
: util_(0), // TODO(gman): Get real number of compressed texture formats.
helper_(helper),
shared_memory_(transfer_buffer, transfer_buffer_id),
pack_alignment_(4),
unpack_alignment_(4) {
}
void GLES2Implementation::MakeIds(GLsizei n, GLuint* ids) {
for (GLsizei ii = 0; ii < n; ++ii) {
ids[ii] = id_allocator_.AllocateID();
}
}
void GLES2Implementation::FreeIds(GLsizei n, const GLuint* ids) {
for (GLsizei ii = 0; ii < n; ++ii) {
id_allocator_.FreeID(ids[ii]);
}
}
void GLES2Implementation::DrawElements(
GLenum mode, GLsizei count, GLenum type, const void* indices) {
helper_->DrawElements(mode, count, type, reinterpret_cast<GLuint>(indices));
}
void GLES2Implementation::VertexAttribPointer(
GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride,
const void* ptr) {
helper_->VertexAttribPointer(index, size, type, normalized, stride,
reinterpret_cast<GLuint>(ptr));
}
void GLES2Implementation::ShaderSource(
GLuint shader, GLsizei count, const char** string, const GLint* length) {
// TODO(gman): change to use buckets and check that there is enough room.
uint32* offsets = shared_memory_.GetAddressAs<uint32*>(0);
char* strings = reinterpret_cast<char*>(offsets + count);
uint32 offset = count * sizeof(*offsets);
for (GLsizei ii = 0; ii < count; ++ii) {
uint32 len = length ? length[ii] : strlen(string[ii]);
memcpy(strings + offset, string[ii], len);
offset += len;
offsets[ii] = offset;
}
helper_->ShaderSource(shader, count, shared_memory_.GetId(), 0, offset);
// TODO(gman): Should insert token but not wait until we need shared memory
// again. Really, I should implement a shared memory manager that puts
// things in the next unused part of shared memory and only blocks
// when it needs more memory.
int32 token = helper_->InsertToken();
helper_->WaitForToken(token);
}
void GLES2Implementation::BufferData(
GLenum target, GLsizeiptr size, const void* data, GLenum usage) {
// TODO(gman): Switch to use buckets alwayst or at least if no room in shared
// memory.
memcpy(shared_memory_.GetAddress(0), data, size);
helper_->BufferData(target, size, shared_memory_.GetId(), 0, usage);
int32 token = helper_->InsertToken();
helper_->WaitForToken(token);
}
void GLES2Implementation::BufferSubData(
GLenum target, GLintptr offset, GLsizeiptr size, const void* data) {
// TODO(gman): Switch to use buckets alwayst or at least if no room in shared
// memory.
memcpy(shared_memory_.GetAddress(0), data, size);
helper_->BufferSubData(target, offset, size, shared_memory_.GetId(), 0);
int32 token = helper_->InsertToken();
helper_->WaitForToken(token);
}
void GLES2Implementation::CompressedTexImage2D(
GLenum target, GLint level, GLenum internalformat, GLsizei width,
GLsizei height, GLint border, GLsizei imageSize, const void* data) {
// TODO(gman): Switch to use buckets alwayst or at least if no room in shared
// memory.
memcpy(shared_memory_.GetAddress(0), data, imageSize);
helper_->CompressedTexImage2D(
target, level, internalformat, width, height, border, imageSize,
shared_memory_.GetId(), 0);
int32 token = helper_->InsertToken();
helper_->WaitForToken(token);
}
void GLES2Implementation::CompressedTexSubImage2D(
GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width,
GLsizei height, GLenum format, GLsizei imageSize, const void* data) {
// TODO(gman): Switch to use buckets alwayst or at least if no room in shared
// memory.
memcpy(shared_memory_.GetAddress(0), data, imageSize);
helper_->CompressedTexSubImage2D(
target, level, xoffset, yoffset, width, height, format, imageSize,
shared_memory_.GetId(), 0);
int32 token = helper_->InsertToken();
helper_->WaitForToken(token);
}
void GLES2Implementation::TexImage2D(
GLenum target, GLint level, GLint internalformat, GLsizei width,
GLsizei height, GLint border, GLenum format, GLenum type,
const void* pixels) {
// TODO(gman): Switch to use buckets alwayst or at least if no room in shared
// memory.
uint32 pixels_size = GLES2Util::ComputeImageDataSize(
width, height, format, type, unpack_alignment_);
memcpy(shared_memory_.GetAddress(0), pixels, pixels_size);
helper_->TexImage2D(
target, level, internalformat, width, height, border, format, type,
shared_memory_.GetId(), 0);
int32 token = helper_->InsertToken();
helper_->WaitForToken(token);
}
void GLES2Implementation::TexSubImage2D(
GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width,
GLsizei height, GLenum format, GLenum type, const void* pixels) {
// TODO(gman): Switch to use buckets alwayst or at least if no room in shared
// memory.
uint32 pixels_size = GLES2Util::ComputeImageDataSize(
width, height, format, type, unpack_alignment_);
memcpy(shared_memory_.GetAddress(0), pixels, pixels_size);
helper_->TexSubImage2D(
target, level, xoffset, yoffset, width, height, format, type,
shared_memory_.GetId(), 0);
int32 token = helper_->InsertToken();
helper_->WaitForToken(token);
}
} // namespace gles2
} // namespace command_buffer
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