mirror of
https://github.com/encounter/dawn-cmake.git
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f8c5e4ab74
Adds some maxAnisotropy implementation. Adds an end2end test, drawing a slanted plane with a texture of which each mipmap has a different color, with different maxAnisotropy values. You can get an idea of what it does at https://jsfiddle.net/t64kpu81/85/ Needs further CTS. Bug: dawn:568 Change-Id: I89ac56d8cf0fbb655358bf6effa016ddc1f8426f Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/35143 Commit-Queue: Kai Ninomiya <kainino@chromium.org> Reviewed-by: Kai Ninomiya <kainino@chromium.org>
125 lines
4.8 KiB
C++
125 lines
4.8 KiB
C++
// Copyright 2017 The Dawn Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "dawn_native/opengl/SamplerGL.h"
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#include "common/Assert.h"
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#include "dawn_native/opengl/DeviceGL.h"
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#include "dawn_native/opengl/UtilsGL.h"
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namespace dawn_native { namespace opengl {
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namespace {
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GLenum MagFilterMode(wgpu::FilterMode filter) {
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switch (filter) {
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case wgpu::FilterMode::Nearest:
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return GL_NEAREST;
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case wgpu::FilterMode::Linear:
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return GL_LINEAR;
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}
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}
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GLenum MinFilterMode(wgpu::FilterMode minFilter, wgpu::FilterMode mipMapFilter) {
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switch (minFilter) {
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case wgpu::FilterMode::Nearest:
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switch (mipMapFilter) {
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case wgpu::FilterMode::Nearest:
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return GL_NEAREST_MIPMAP_NEAREST;
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case wgpu::FilterMode::Linear:
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return GL_NEAREST_MIPMAP_LINEAR;
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}
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case wgpu::FilterMode::Linear:
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switch (mipMapFilter) {
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case wgpu::FilterMode::Nearest:
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return GL_LINEAR_MIPMAP_NEAREST;
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case wgpu::FilterMode::Linear:
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return GL_LINEAR_MIPMAP_LINEAR;
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}
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}
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}
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GLenum WrapMode(wgpu::AddressMode mode) {
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switch (mode) {
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case wgpu::AddressMode::Repeat:
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return GL_REPEAT;
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case wgpu::AddressMode::MirrorRepeat:
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return GL_MIRRORED_REPEAT;
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case wgpu::AddressMode::ClampToEdge:
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return GL_CLAMP_TO_EDGE;
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}
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}
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} // namespace
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Sampler::Sampler(Device* device, const SamplerDescriptor* descriptor)
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: SamplerBase(device, descriptor) {
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const OpenGLFunctions& gl = ToBackend(GetDevice())->gl;
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gl.GenSamplers(1, &mFilteringHandle);
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SetupGLSampler(mFilteringHandle, descriptor, false);
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gl.GenSamplers(1, &mNonFilteringHandle);
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SetupGLSampler(mNonFilteringHandle, descriptor, true);
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}
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Sampler::~Sampler() {
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const OpenGLFunctions& gl = ToBackend(GetDevice())->gl;
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gl.DeleteSamplers(1, &mFilteringHandle);
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gl.DeleteSamplers(1, &mNonFilteringHandle);
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}
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void Sampler::SetupGLSampler(GLuint sampler,
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const SamplerDescriptor* descriptor,
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bool forceNearest) {
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Device* device = ToBackend(GetDevice());
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const OpenGLFunctions& gl = device->gl;
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if (forceNearest) {
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gl.SamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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gl.SamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
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} else {
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gl.SamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER,
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MagFilterMode(descriptor->magFilter));
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gl.SamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER,
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MinFilterMode(descriptor->minFilter, descriptor->mipmapFilter));
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}
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gl.SamplerParameteri(sampler, GL_TEXTURE_WRAP_R, WrapMode(descriptor->addressModeW));
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gl.SamplerParameteri(sampler, GL_TEXTURE_WRAP_S, WrapMode(descriptor->addressModeU));
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gl.SamplerParameteri(sampler, GL_TEXTURE_WRAP_T, WrapMode(descriptor->addressModeV));
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gl.SamplerParameterf(sampler, GL_TEXTURE_MIN_LOD, descriptor->lodMinClamp);
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gl.SamplerParameterf(sampler, GL_TEXTURE_MAX_LOD, descriptor->lodMaxClamp);
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if (descriptor->compare != wgpu::CompareFunction::Undefined) {
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gl.SamplerParameteri(sampler, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE);
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gl.SamplerParameteri(sampler, GL_TEXTURE_COMPARE_FUNC,
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ToOpenGLCompareFunction(descriptor->compare));
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}
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if (gl.IsAtLeastGL(4, 6) ||
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gl.IsGLExtensionSupported("GL_EXT_texture_filter_anisotropic")) {
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gl.SamplerParameterf(sampler, GL_TEXTURE_MAX_ANISOTROPY, GetMaxAnisotropy());
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}
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}
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GLuint Sampler::GetFilteringHandle() const {
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return mFilteringHandle;
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}
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GLuint Sampler::GetNonFilteringHandle() const {
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return mNonFilteringHandle;
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}
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}} // namespace dawn_native::opengl
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