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Replaced gli with libktx for mip generation sample

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This commit is contained in:
Sascha Willems 2019-08-03 10:20:36 +02:00
parent 0eef7f2ee1
commit 803ccd0cf4
1 changed files with 27 additions and 16 deletions
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43
examples/texturemipmapgen/texturemipmapgen.cpp
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@ -1,13 +1,11 @@
/*
* Vulkan Example - Runtime mip map generation
*
* Copyright (C) 2016 by Sascha Willems - www.saschawillems.de
* Copyright (C) by Sascha Willems - www.saschawillems.de
*
* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
*/
// todo: Fallback for sampler selection on devices that don't support shaderSampledImageArrayDynamicIndexing
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -19,13 +17,14 @@
#define GLM_FORCE_DEPTH_ZERO_TO_ONE
#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <gli/gli.hpp>
#include <vulkan/vulkan.h>
#include "vulkanexamplebase.h"
#include "VulkanDevice.hpp"
#include "VulkanBuffer.hpp"
#include "VulkanModel.hpp"
#include <ktx.h>
#include <ktxvulkan.h>
#define VERTEX_BUFFER_BIND_ID 0
#define ENABLE_VALIDATION false
@ -110,13 +109,18 @@ public:
models.tunnel.destroy();
}
void loadTexture(std::string fileName, VkFormat format, bool forceLinearTiling)
void loadTexture(std::string filename, VkFormat format, bool forceLinearTiling)
{
ktxResult result;
ktxTexture* ktxTexture;
#if defined(__ANDROID__)
// Textures are stored inside the apk on Android (compressed)
// So they need to be loaded via the asset manager
AAsset* asset = AAssetManager_open(androidApp->activity->assetManager, fileName.c_str(), AASSET_MODE_STREAMING);
assert(asset);
AAsset* asset = AAssetManager_open(androidApp->activity->assetManager, filename.c_str(), AASSET_MODE_STREAMING);
if (!asset) {
vks::tools::exitFatal("Could not load texture from " + filename + "\n\nThe file may be part of the additional asset pack.\n\nRun \"download_assets.py\" in the repository root to download the latest version.", -1);
}
size_t size = AAsset_getLength(asset);
assert(size > 0);
@ -124,17 +128,23 @@ public:
AAsset_read(asset, textureData, size);
AAsset_close(asset);
gli::texture2d tex2D(gli::load((const char*)textureData, size));
#else
gli::texture2d tex2D(gli::load(fileName));
#endif
result = ktxTexture_CreateFromMemory(textureData, size, KTX_TEXTURE_CREATE_LOAD_IMAGE_DATA_BIT, target);
assert(!tex2D.empty());
free(textureData);
#else
if (!vks::tools::fileExists(filename)) {
vks::tools::exitFatal("Could not load texture from " + filename + "\n\nThe file may be part of the additional asset pack.\n\nRun \"download_assets.py\" in the repository root to download the latest version.", -1);
}
result = ktxTexture_CreateFromNamedFile(filename.c_str(), KTX_TEXTURE_CREATE_LOAD_IMAGE_DATA_BIT, &ktxTexture);
#endif
assert(result == KTX_SUCCESS);
VkFormatProperties formatProperties;
texture.width = static_cast<uint32_t>(tex2D[0].extent().x);
texture.height = static_cast<uint32_t>(tex2D[0].extent().y);
texture.width = ktxTexture->baseWidth;
texture.height = ktxTexture->baseHeight;
ktx_uint8_t *ktxTextureData = ktxTexture_GetData(ktxTexture);
ktx_size_t ktxTextureSize = ktxTexture_GetImageSize(ktxTexture, 0);
// calculate num of mip maps
// numLevels = 1 + floor(log2(max(w, h, d)))
@ -156,7 +166,7 @@ public:
VkDeviceMemory stagingMemory;
VkBufferCreateInfo bufferCreateInfo = vks::initializers::bufferCreateInfo();
bufferCreateInfo.size = tex2D.size();
bufferCreateInfo.size = ktxTextureSize;
// This buffer is used as a transfer source for the buffer copy
bufferCreateInfo.usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT;
bufferCreateInfo.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
@ -170,7 +180,7 @@ public:
// Copy texture data into staging buffer
uint8_t *data;
VK_CHECK_RESULT(vkMapMemory(device, stagingMemory, 0, memReqs.size, 0, (void **)&data));
memcpy(data, tex2D.data(), tex2D.size());
memcpy(data, ktxTextureData, ktxTextureSize);
vkUnmapMemory(device, stagingMemory);
// Create optimal tiled target image
@ -233,6 +243,7 @@ public:
// Clean up staging resources
vkFreeMemory(device, stagingMemory, nullptr);
vkDestroyBuffer(device, stagingBuffer, nullptr);
ktxTexture_Destroy(ktxTexture);
// Generate the mip chain
// ---------------------------------------------------------------