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423 lines
16 KiB
C++
423 lines
16 KiB
C++
//
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// GL41BackendTexture.cpp
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// libraries/gpu/src/gpu
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//
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// Created by Sam Gateau on 1/19/2015.
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// Copyright 2014 High Fidelity, Inc.
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//
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// Distributed under the Apache License, Version 2.0.
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// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
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//
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#include "GL41Backend.h"
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#include <unordered_set>
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#include <unordered_map>
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#include "../gl/GLTexelFormat.h"
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using namespace gpu;
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using namespace gpu::gl;
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using namespace gpu::gl41;
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GLTexture* GL41Backend::syncGPUObject(const TexturePointer& texturePointer) {
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if (!texturePointer) {
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return nullptr;
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}
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const Texture& texture = *texturePointer;
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if (TextureUsageType::EXTERNAL == texture.getUsageType()) {
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return Parent::syncGPUObject(texturePointer);
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}
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if (!texture.isDefined()) {
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// NO texture definition yet so let's avoid thinking
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return nullptr;
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}
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GL41Texture* object = Backend::getGPUObject<GL41Texture>(texture);
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if (!object) {
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switch (texture.getUsageType()) {
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case TextureUsageType::RENDERBUFFER:
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object = new GL41AttachmentTexture(shared_from_this(), texture);
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break;
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case TextureUsageType::STRICT_RESOURCE:
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qCDebug(gpugllogging) << "Strict texture " << texture.source().c_str();
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object = new GL41StrictResourceTexture(shared_from_this(), texture);
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break;
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case TextureUsageType::RESOURCE:
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qCDebug(gpugllogging) << "variable / Strict texture " << texture.source().c_str();
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object = new GL41ResourceTexture(shared_from_this(), texture);
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GLVariableAllocationSupport::addMemoryManagedTexture(texturePointer);
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break;
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default:
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Q_UNREACHABLE();
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}
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}
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return object;
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}
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using GL41Texture = GL41Backend::GL41Texture;
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GL41Texture::GL41Texture(const std::weak_ptr<GLBackend>& backend, const Texture& texture)
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: GLTexture(backend, texture, allocate(texture)) {
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incrementTextureGPUCount();
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}
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GLuint GL41Texture::allocate(const Texture& texture) {
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GLuint result;
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glGenTextures(1, &result);
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return result;
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}
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void GL41Texture::withPreservedTexture(std::function<void()> f) const {
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glActiveTexture(GL_TEXTURE0 + GL41Backend::RESOURCE_TRANSFER_TEX_UNIT);
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glBindTexture(_target, _texture);
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(void)CHECK_GL_ERROR();
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f();
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glBindTexture(_target, 0);
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(void)CHECK_GL_ERROR();
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}
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void GL41Texture::generateMips() const {
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withPreservedTexture([&] {
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glGenerateMipmap(_target);
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});
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(void)CHECK_GL_ERROR();
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}
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void GL41Texture::copyMipFaceLinesFromTexture(uint16_t mip, uint8_t face, const uvec3& size, uint32_t yOffset, GLenum format, GLenum internalFormat, GLenum type, Size sourceSize, const void* sourcePointer) const {
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if (GL_TEXTURE_2D == _target) {
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if (GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT == internalFormat) {
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qCDebug(gpugllogging) << "Compressed mipData level=" << mip << " face=" << (int)face << " for texture " << _gpuObject.source().c_str();
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qCDebug(gpugllogging) << "Compressed mipData" << internalFormat << size.x << size.y << sourceSize << sourcePointer;
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glCompressedTexImage2D(_target, mip, internalFormat, size.x, size.y, 0, sourceSize, sourcePointer);
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} else {
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glTexSubImage2D(_target, mip, 0, yOffset, size.x, size.y, format, type, sourcePointer);
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}
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} else if (GL_TEXTURE_CUBE_MAP == _target) {
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auto target = GLTexture::CUBE_FACE_LAYOUT[face];
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glTexSubImage2D(target, mip, 0, yOffset, size.x, size.y, format, type, sourcePointer);
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} else {
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assert(false);
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}
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(void)CHECK_GL_ERROR();
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}
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void GL41Texture::syncSampler() const {
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const Sampler& sampler = _gpuObject.getSampler();
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const auto& fm = FILTER_MODES[sampler.getFilter()];
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glTexParameteri(_target, GL_TEXTURE_MIN_FILTER, fm.minFilter);
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glTexParameteri(_target, GL_TEXTURE_MAG_FILTER, fm.magFilter);
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if (sampler.doComparison()) {
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glTexParameteri(_target, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_R_TO_TEXTURE);
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glTexParameteri(_target, GL_TEXTURE_COMPARE_FUNC, COMPARISON_TO_GL[sampler.getComparisonFunction()]);
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} else {
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glTexParameteri(_target, GL_TEXTURE_COMPARE_MODE, GL_NONE);
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}
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glTexParameteri(_target, GL_TEXTURE_WRAP_S, WRAP_MODES[sampler.getWrapModeU()]);
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glTexParameteri(_target, GL_TEXTURE_WRAP_T, WRAP_MODES[sampler.getWrapModeV()]);
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glTexParameteri(_target, GL_TEXTURE_WRAP_R, WRAP_MODES[sampler.getWrapModeW()]);
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glTexParameterfv(_target, GL_TEXTURE_BORDER_COLOR, (const float*)&sampler.getBorderColor());
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glTexParameteri(_target, GL_TEXTURE_BASE_LEVEL, (uint16)sampler.getMipOffset());
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glTexParameterf(_target, GL_TEXTURE_MIN_LOD, (float)sampler.getMinMip());
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glTexParameterf(_target, GL_TEXTURE_MAX_LOD, (sampler.getMaxMip() == Sampler::MAX_MIP_LEVEL ? 1000.f : sampler.getMaxMip()));
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glTexParameterf(_target, GL_TEXTURE_MAX_ANISOTROPY_EXT, sampler.getMaxAnisotropy());
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}
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using GL41FixedAllocationTexture = GL41Backend::GL41FixedAllocationTexture;
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GL41FixedAllocationTexture::GL41FixedAllocationTexture(const std::weak_ptr<GLBackend>& backend, const Texture& texture) : GL41Texture(backend, texture), _size(texture.evalTotalSize()) {
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withPreservedTexture([&] {
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allocateStorage();
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syncSampler();
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});
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}
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GL41FixedAllocationTexture::~GL41FixedAllocationTexture() {
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}
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void GL41FixedAllocationTexture::allocateStorage() const {
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const GLTexelFormat texelFormat = GLTexelFormat::evalGLTexelFormat(_gpuObject.getTexelFormat());
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const auto numMips = _gpuObject.getNumMips();
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// glTextureStorage2D(_id, mips, texelFormat.internalFormat, dimensions.x, dimensions.y);
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for (GLint level = 0; level < numMips; level++) {
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Vec3u dimensions = _gpuObject.evalMipDimensions(level);
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for (GLenum target : getFaceTargets(_target)) {
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glTexImage2D(target, level, texelFormat.internalFormat, dimensions.x, dimensions.y, 0, texelFormat.format, texelFormat.type, nullptr);
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}
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}
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glTexParameteri(_target, GL_TEXTURE_BASE_LEVEL, 0);
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glTexParameteri(_target, GL_TEXTURE_MAX_LEVEL, numMips - 1);
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}
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void GL41FixedAllocationTexture::syncSampler() const {
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Parent::syncSampler();
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const Sampler& sampler = _gpuObject.getSampler();
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auto baseMip = std::max<uint16_t>(sampler.getMipOffset(), sampler.getMinMip());
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glTexParameteri(_target, GL_TEXTURE_BASE_LEVEL, baseMip);
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glTexParameterf(_target, GL_TEXTURE_MIN_LOD, (float)sampler.getMinMip());
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glTexParameterf(_target, GL_TEXTURE_MAX_LOD, (sampler.getMaxMip() == Sampler::MAX_MIP_LEVEL ? 1000.0f : sampler.getMaxMip()));
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}
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// Renderbuffer attachment textures
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using GL41AttachmentTexture = GL41Backend::GL41AttachmentTexture;
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GL41AttachmentTexture::GL41AttachmentTexture(const std::weak_ptr<GLBackend>& backend, const Texture& texture) : GL41FixedAllocationTexture(backend, texture) {
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Backend::updateTextureGPUFramebufferMemoryUsage(0, size());
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}
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GL41AttachmentTexture::~GL41AttachmentTexture() {
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Backend::updateTextureGPUFramebufferMemoryUsage(size(), 0);
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}
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// Strict resource textures
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using GL41StrictResourceTexture = GL41Backend::GL41StrictResourceTexture;
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GL41StrictResourceTexture::GL41StrictResourceTexture(const std::weak_ptr<GLBackend>& backend, const Texture& texture) : GL41FixedAllocationTexture(backend, texture) {
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withPreservedTexture([&] {
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auto mipLevels = _gpuObject.getNumMips();
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for (uint16_t sourceMip = 0; sourceMip < mipLevels; sourceMip++) {
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uint16_t targetMip = sourceMip;
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size_t maxFace = GLTexture::getFaceCount(_target);
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for (uint8_t face = 0; face < maxFace; face++) {
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copyMipFaceFromTexture(sourceMip, targetMip, face);
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}
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}
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});
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if (texture.isAutogenerateMips()) {
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generateMips();
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}
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}
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using GL41VariableAllocationTexture = GL41Backend::GL41VariableAllocationTexture;
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GL41VariableAllocationTexture::GL41VariableAllocationTexture(const std::weak_ptr<GLBackend>& backend, const Texture& texture) : GL41Texture(backend, texture) {
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auto mipLevels = texture.getNumMips();
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_allocatedMip = mipLevels;
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uvec3 mipDimensions;
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for (uint16_t mip = 0; mip < mipLevels; ++mip) {
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if (glm::all(glm::lessThanEqual(texture.evalMipDimensions(mip), INITIAL_MIP_TRANSFER_DIMENSIONS))) {
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_maxAllocatedMip = _populatedMip = mip;
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break;
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}
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}
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uint16_t allocatedMip = _populatedMip - std::min<uint16_t>(_populatedMip, 2);
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allocateStorage(allocatedMip);
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_memoryPressureStateStale = true;
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size_t maxFace = GLTexture::getFaceCount(_target);
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for (uint16_t sourceMip = _populatedMip; sourceMip < mipLevels; ++sourceMip) {
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uint16_t targetMip = sourceMip - _allocatedMip;
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for (uint8_t face = 0; face < maxFace; ++face) {
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copyMipFaceFromTexture(sourceMip, targetMip, face);
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}
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}
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syncSampler();
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}
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GL41VariableAllocationTexture::~GL41VariableAllocationTexture() {
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Backend::updateTextureGPUMemoryUsage(_size, 0);
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}
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void GL41VariableAllocationTexture::allocateStorage(uint16 allocatedMip) {
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_allocatedMip = allocatedMip;
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const GLTexelFormat texelFormat = GLTexelFormat::evalGLTexelFormat(_gpuObject.getTexelFormat());
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const auto dimensions = _gpuObject.evalMipDimensions(_allocatedMip);
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const auto totalMips = _gpuObject.getNumMips();
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const auto mips = totalMips - _allocatedMip;
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withPreservedTexture([&] {
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// FIXME technically GL 4.2, but OSX includes the ARB_texture_storage extension
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glTexStorage2D(_target, mips, texelFormat.internalFormat, dimensions.x, dimensions.y);
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});
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auto mipLevels = _gpuObject.getNumMips();
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_size = 0;
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for (uint16_t mip = _allocatedMip; mip < mipLevels; ++mip) {
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_size += _gpuObject.evalMipSize(mip);
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}
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Backend::updateTextureGPUMemoryUsage(0, _size);
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}
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void GL41VariableAllocationTexture::copyMipFaceLinesFromTexture(uint16_t mip, uint8_t face, const uvec3& size, uint32_t yOffset, GLenum format, GLenum type, const void* sourcePointer) const {
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withPreservedTexture([&] {
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Parent::copyMipFaceLinesFromTexture(mip, face, size, yOffset, format, type, sourcePointer);
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});
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}
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void GL41VariableAllocationTexture::syncSampler() const {
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withPreservedTexture([&] {
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Parent::syncSampler();
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glTexParameteri(_target, GL_TEXTURE_BASE_LEVEL, _populatedMip - _allocatedMip);
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});
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}
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void GL41VariableAllocationTexture::promote() {
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PROFILE_RANGE(render_gpu_gl, __FUNCTION__);
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Q_ASSERT(_allocatedMip > 0);
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GLuint oldId = _id;
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auto oldSize = _size;
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// create new texture
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const_cast<GLuint&>(_id) = allocate(_gpuObject);
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uint16_t oldAllocatedMip = _allocatedMip;
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// allocate storage for new level
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allocateStorage(_allocatedMip - std::min<uint16_t>(_allocatedMip, 2));
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withPreservedTexture([&] {
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GLuint fbo { 0 };
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glGenFramebuffers(1, &fbo);
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glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo);
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uint16_t mips = _gpuObject.getNumMips();
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// copy pre-existing mips
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for (uint16_t mip = _populatedMip; mip < mips; ++mip) {
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auto mipDimensions = _gpuObject.evalMipDimensions(mip);
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uint16_t targetMip = mip - _allocatedMip;
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uint16_t sourceMip = mip - oldAllocatedMip;
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for (GLenum target : getFaceTargets(_target)) {
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glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, target, oldId, sourceMip);
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(void)CHECK_GL_ERROR();
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glCopyTexSubImage2D(target, targetMip, 0, 0, 0, 0, mipDimensions.x, mipDimensions.y);
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(void)CHECK_GL_ERROR();
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}
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}
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// destroy the transfer framebuffer
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glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
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glDeleteFramebuffers(1, &fbo);
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syncSampler();
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});
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// destroy the old texture
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glDeleteTextures(1, &oldId);
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// update the memory usage
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Backend::updateTextureGPUMemoryUsage(oldSize, 0);
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populateTransferQueue();
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}
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void GL41VariableAllocationTexture::demote() {
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PROFILE_RANGE(render_gpu_gl, __FUNCTION__);
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Q_ASSERT(_allocatedMip < _maxAllocatedMip);
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auto oldId = _id;
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auto oldSize = _size;
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const_cast<GLuint&>(_id) = allocate(_gpuObject);
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uint16_t oldAllocatedMip = _allocatedMip;
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allocateStorage(_allocatedMip + 1);
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_populatedMip = std::max(_populatedMip, _allocatedMip);
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withPreservedTexture([&] {
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GLuint fbo { 0 };
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glCreateFramebuffers(1, &fbo);
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glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo);
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uint16_t mips = _gpuObject.getNumMips();
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// copy pre-existing mips
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for (uint16_t mip = _populatedMip; mip < mips; ++mip) {
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auto mipDimensions = _gpuObject.evalMipDimensions(mip);
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uint16_t targetMip = mip - _allocatedMip;
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uint16_t sourceMip = mip - oldAllocatedMip;
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for (GLenum target : getFaceTargets(_target)) {
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glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, target, oldId, sourceMip);
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(void)CHECK_GL_ERROR();
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glCopyTexSubImage2D(target, targetMip, 0, 0, 0, 0, mipDimensions.x, mipDimensions.y);
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(void)CHECK_GL_ERROR();
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}
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}
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// destroy the transfer framebuffer
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glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
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glDeleteFramebuffers(1, &fbo);
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syncSampler();
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});
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// destroy the old texture
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glDeleteTextures(1, &oldId);
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// update the memory usage
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Backend::updateTextureGPUMemoryUsage(oldSize, 0);
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populateTransferQueue();
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}
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void GL41VariableAllocationTexture::populateTransferQueue() {
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PROFILE_RANGE(render_gpu_gl, __FUNCTION__);
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if (_populatedMip <= _allocatedMip) {
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return;
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}
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_pendingTransfers = TransferQueue();
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const uint8_t maxFace = GLTexture::getFaceCount(_target);
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uint16_t sourceMip = _populatedMip;
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do {
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--sourceMip;
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auto targetMip = sourceMip - _allocatedMip;
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auto mipDimensions = _gpuObject.evalMipDimensions(sourceMip);
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for (uint8_t face = 0; face < maxFace; ++face) {
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if (!_gpuObject.isStoredMipFaceAvailable(sourceMip, face)) {
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continue;
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}
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// If the mip is less than the max transfer size, then just do it in one transfer
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if (glm::all(glm::lessThanEqual(mipDimensions, MAX_TRANSFER_DIMENSIONS))) {
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// Can the mip be transferred in one go
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_pendingTransfers.emplace(new TransferJob(*this, sourceMip, targetMip, face));
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continue;
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}
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// break down the transfers into chunks so that no single transfer is
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// consuming more than X bandwidth
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auto mipSize = _gpuObject.getStoredMipFaceSize(sourceMip, face);
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const auto lines = mipDimensions.y;
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auto bytesPerLine = mipSize / lines;
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Q_ASSERT(0 == (mipSize % lines));
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uint32_t linesPerTransfer = (uint32_t)(MAX_TRANSFER_SIZE / bytesPerLine);
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uint32_t lineOffset = 0;
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while (lineOffset < lines) {
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uint32_t linesToCopy = std::min<uint32_t>(lines - lineOffset, linesPerTransfer);
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_pendingTransfers.emplace(new TransferJob(*this, sourceMip, targetMip, face, linesToCopy, lineOffset));
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lineOffset += linesToCopy;
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}
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}
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// queue up the sampler and populated mip change for after the transfer has completed
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_pendingTransfers.emplace(new TransferJob(*this, [=] {
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_populatedMip = sourceMip;
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syncSampler();
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}));
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} while (sourceMip != _allocatedMip);
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}
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// resource textures
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using GL41ResourceTexture = GL41Backend::GL41ResourceTexture;
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GL41ResourceTexture::GL41ResourceTexture(const std::weak_ptr<GLBackend>& backend, const Texture& texture) : GL41VariableAllocationTexture(backend, texture) {
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if (texture.isAutogenerateMips()) {
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generateMips();
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}
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}
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GL41ResourceTexture::~GL41ResourceTexture() {
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}
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