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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// This file implements the sampler-related GAPI functions on GL.
#include "command_buffer/service/cross/gl/gapi_gl.h"
#include "command_buffer/service/cross/gl/sampler_gl.h"
namespace o3d {
namespace command_buffer {
namespace {
// Gets the GL enum corresponding to an addressing mode.
GLenum GLAddressMode(sampler::AddressingMode o3d_mode) {
switch (o3d_mode) {
case sampler::WRAP:
return GL_REPEAT;
case sampler::MIRROR_REPEAT:
return GL_MIRRORED_REPEAT;
case sampler::CLAMP_TO_EDGE:
return GL_CLAMP_TO_EDGE;
case sampler::CLAMP_TO_BORDER:
return GL_CLAMP_TO_BORDER;
default:
DLOG(FATAL) << "Not Reached";
return GL_REPEAT;
}
}
// Gets the GL enum for the minification filter based on the command buffer min
// and mip filtering modes.
GLenum GLMinFilter(sampler::FilteringMode min_filter,
sampler::FilteringMode mip_filter) {
switch (min_filter) {
case sampler::POINT:
if (mip_filter == sampler::NONE)
return GL_NEAREST;
else if (mip_filter == sampler::POINT)
return GL_NEAREST_MIPMAP_NEAREST;
else if (mip_filter == sampler::LINEAR)
return GL_NEAREST_MIPMAP_LINEAR;
case sampler::LINEAR:
if (mip_filter == sampler::NONE)
return GL_LINEAR;
else if (mip_filter == sampler::POINT)
return GL_LINEAR_MIPMAP_NEAREST;
else if (mip_filter == sampler::LINEAR)
return GL_LINEAR_MIPMAP_LINEAR;
default:
DLOG(FATAL) << "Not Reached";
return GL_LINEAR_MIPMAP_NEAREST;
}
}
// Gets the GL enum for the magnification filter based on the command buffer mag
// filtering mode.
GLenum GLMagFilter(sampler::FilteringMode mag_filter) {
switch (mag_filter) {
case sampler::POINT:
return GL_NEAREST;
case sampler::LINEAR:
return GL_LINEAR;
default:
DLOG(FATAL) << "Not Reached";
return GL_LINEAR;
}
}
// Gets the GL enum representing the GL target based on the texture type.
GLenum GLTextureTarget(texture::Type type) {
switch (type) {
case texture::TEXTURE_2D:
return GL_TEXTURE_2D;
case texture::TEXTURE_3D:
return GL_TEXTURE_3D;
case texture::TEXTURE_CUBE:
return GL_TEXTURE_CUBE_MAP;
default:
DLOG(FATAL) << "Not Reached";
return GL_TEXTURE_2D;
}
}
} // anonymous namespace
SamplerGL::SamplerGL()
: texture_id_(kInvalidResource),
gl_texture_(0) {
SetStates(sampler::CLAMP_TO_EDGE,
sampler::CLAMP_TO_EDGE,
sampler::CLAMP_TO_EDGE,
sampler::LINEAR,
sampler::LINEAR,
sampler::POINT,
1);
RGBA black = {0, 0, 0, 1};
SetBorderColor(black);
}
bool SamplerGL::ApplyStates(GAPIGL *gapi) {
DCHECK(gapi);
TextureGL *texture = gapi->GetTexture(texture_id_);
if (!texture) {
gl_texture_ = 0;
return false;
}
GLenum target = GLTextureTarget(texture->type());
gl_texture_ = texture->gl_texture();
glBindTexture(target, gl_texture_);
glTexParameteri(target, GL_TEXTURE_WRAP_S, gl_wrap_s_);
glTexParameteri(target, GL_TEXTURE_WRAP_T, gl_wrap_t_);
glTexParameteri(target, GL_TEXTURE_WRAP_R, gl_wrap_r_);
glTexParameteri(target, GL_TEXTURE_MIN_FILTER, gl_min_filter_);
glTexParameteri(target, GL_TEXTURE_MAG_FILTER, gl_mag_filter_);
glTexParameteri(target, GL_TEXTURE_MAX_ANISOTROPY_EXT, gl_max_anisotropy_);
glTexParameterfv(target, GL_TEXTURE_BORDER_COLOR, gl_border_color_);
return true;
}
void SamplerGL::SetStates(sampler::AddressingMode addressing_u,
sampler::AddressingMode addressing_v,
sampler::AddressingMode addressing_w,
sampler::FilteringMode mag_filter,
sampler::FilteringMode min_filter,
sampler::FilteringMode mip_filter,
unsigned int max_anisotropy) {
// These are validated in GAPIDecoder.cc
DCHECK_NE(mag_filter, sampler::NONE);
DCHECK_NE(min_filter, sampler::NONE);
DCHECK_GT(max_anisotropy, 0U);
gl_wrap_s_ = GLAddressMode(addressing_u);
gl_wrap_t_ = GLAddressMode(addressing_v);
gl_wrap_r_ = GLAddressMode(addressing_w);
gl_mag_filter_ = GLMagFilter(mag_filter);
gl_min_filter_ = GLMinFilter(min_filter, mip_filter);
gl_max_anisotropy_ = max_anisotropy;
}
void SamplerGL::SetBorderColor(const RGBA &color) {
gl_border_color_[0] = color.red;
gl_border_color_[1] = color.green;
gl_border_color_[2] = color.blue;
gl_border_color_[3] = color.alpha;
}
BufferSyncInterface::ParseError GAPIGL::CreateSampler(
ResourceID id) {
// Dirty effect, because this sampler id may be used.
DirtyEffect();
samplers_.Assign(id, new SamplerGL());
return BufferSyncInterface::kParseNoError;
}
// Destroys the Sampler resource.
BufferSyncInterface::ParseError GAPIGL::DestroySampler(ResourceID id) {
// Dirty effect, because this sampler id may be used.
DirtyEffect();
return samplers_.Destroy(id) ?
BufferSyncInterface::kParseNoError :
BufferSyncInterface::kParseInvalidArguments;
}
BufferSyncInterface::ParseError GAPIGL::SetSamplerStates(
ResourceID id,
sampler::AddressingMode addressing_u,
sampler::AddressingMode addressing_v,
sampler::AddressingMode addressing_w,
sampler::FilteringMode mag_filter,
sampler::FilteringMode min_filter,
sampler::FilteringMode mip_filter,
unsigned int max_anisotropy) {
SamplerGL *sampler = samplers_.Get(id);
if (!sampler)
return BufferSyncInterface::kParseInvalidArguments;
// Dirty effect, because this sampler id may be used.
DirtyEffect();
sampler->SetStates(addressing_u, addressing_v, addressing_w,
mag_filter, min_filter, mip_filter, max_anisotropy);
return BufferSyncInterface::kParseNoError;
}
BufferSyncInterface::ParseError GAPIGL::SetSamplerBorderColor(
ResourceID id,
const RGBA &color) {
SamplerGL *sampler = samplers_.Get(id);
if (!sampler)
return BufferSyncInterface::kParseInvalidArguments;
// Dirty effect, because this sampler id may be used.
DirtyEffect();
sampler->SetBorderColor(color);
return BufferSyncInterface::kParseNoError;
}
BufferSyncInterface::ParseError GAPIGL::SetSamplerTexture(
ResourceID id,
ResourceID texture_id) {
SamplerGL *sampler = samplers_.Get(id);
if (!sampler)
return BufferSyncInterface::kParseInvalidArguments;
// Dirty effect, because this sampler id may be used.
DirtyEffect();
sampler->SetTexture(texture_id);
return BufferSyncInterface::kParseNoError;
}
} // namespace command_buffer
} // namespace o3d
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