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-rw-r--r--3rdparty/bgfx/examples/47-pixelformats/pixelformats.cpp828
1 files changed, 828 insertions, 0 deletions
diff --git a/3rdparty/bgfx/examples/47-pixelformats/pixelformats.cpp b/3rdparty/bgfx/examples/47-pixelformats/pixelformats.cpp
new file mode 100644
index 00000000000..98c27558b29
--- /dev/null
+++ b/3rdparty/bgfx/examples/47-pixelformats/pixelformats.cpp
@@ -0,0 +1,828 @@
+/*
+ * Copyright 2022-2022 Sandy Carter. All rights reserved.
+ * License: https://github.com/bkaradzic/bgfx/blob/master/LICENSE
+ */
+
+#include "common.h"
+#include "bgfx_utils.h"
+#include "imgui/imgui.h"
+
+#include <bx/allocator.h>
+#include <bx/math.h>
+
+#include <bimg/decode.h>
+
+#include <tinystl/string.h>
+#include <tinystl/vector.h>
+namespace stl = tinystl;
+
+namespace
+{
+
+constexpr int32_t kCheckerboardSize = 128;
+constexpr int32_t kFirstUncompressedFormatIndex = bgfx::TextureFormat::Unknown + 1;
+constexpr int32_t kNumCompressedFormats = bgfx::TextureFormat::Unknown;
+constexpr int32_t kNumUncompressedFormats = bgfx::TextureFormat::UnknownDepth - kFirstUncompressedFormatIndex;
+constexpr int32_t kNumFormats = kNumCompressedFormats + kNumUncompressedFormats;
+const int32_t kNumFormatsInRow = (int32_t)bx::ceil(1.2f * bx::sqrt(kNumFormats) );
+
+inline int32_t formatToIndex(bimg::TextureFormat::Enum format)
+{
+ int32_t index = format;
+ if (index >= kFirstUncompressedFormatIndex)
+ {
+ --index;
+ }
+ return index;
+}
+
+inline bimg::TextureFormat::Enum indexToFormat(int32_t index)
+{
+ if (index < kNumCompressedFormats)
+ {
+ return bimg::TextureFormat::Enum(index);
+ }
+ else if (index >= kNumCompressedFormats && index < kNumFormats)
+ {
+ return bimg::TextureFormat::Enum(index + 1);
+ }
+ else
+ {
+ return bimg::TextureFormat::Unknown;
+ }
+}
+
+struct TextureStatus
+{
+ enum Enum
+ {
+ Ok,
+ NotInitialized,
+ FormatNotSupported,
+ ConversionNotSupported,
+ FormatIgnored
+ };
+
+ inline static const char* getDescription(Enum value)
+ {
+ switch (value)
+ {
+ case Ok: return "Ok";
+ case NotInitialized: return "Texture was not initialized";
+ case FormatNotSupported: return "Format not supported by GPU/backend";
+ case ConversionNotSupported: return "Conversion from RGBA8 not supported";
+ case FormatIgnored: return "Format is ignored by this example";
+ }
+
+ return "Unknown";
+ }
+
+ inline static bool isError(Enum value)
+ {
+ return value == FormatNotSupported
+ || value == ConversionNotSupported
+ ;
+ }
+};
+
+struct Texture
+{
+ uint16_t m_width = 0;
+ uint16_t m_height = 0;
+ TextureStatus::Enum m_status = TextureStatus::NotInitialized;
+ bgfx::TextureHandle m_texture = BGFX_INVALID_HANDLE;
+};
+
+struct TextureSet
+{
+ stl::string m_name;
+ uint16_t m_maxWidth = 0;
+ uint16_t m_maxHeight = 0;
+ bool m_hasCompressedTextures = false;
+ Texture m_textures[kNumFormats];
+};
+
+static bimg::ImageContainer* generateHueWheelImage()
+{
+ constexpr int32_t kTextureSize = 256;
+ constexpr int32_t kHalfTextureSize = kTextureSize / 2;
+
+ bimg::ImageContainer* image = bimg::imageAlloc(
+ entry::getAllocator(),
+ bimg::TextureFormat::RGBA32F,
+ kTextureSize,
+ kTextureSize,
+ 1,
+ 1,
+ false,
+ false,
+ NULL
+ );
+ if (NULL == image)
+ {
+ return NULL;
+ }
+
+ float* rgbaf32Pixels = (float*)image->m_data;
+
+ for (int32_t y = 0 ; y < kTextureSize; ++y)
+ {
+ for (int32_t x = 0; x < kTextureSize; ++x)
+ {
+ float relX = (x - kHalfTextureSize) / (float) kHalfTextureSize;
+ float relY = (y - kHalfTextureSize) / (float) kHalfTextureSize;
+ float distance = bx::min(1.0f, bx::sqrt(relX * relX + relY * relY) );
+ float angle = bx::atan2(relY, relX);
+ float* pixel = &rgbaf32Pixels[(x + y * kTextureSize) * 4];
+ float hsv[3] = {angle / (2.0f * bx::kPi), 1.0f, 1.0f - distance};
+ bx::hsvToRgb(pixel, hsv);
+ pixel[3] = 1.0f - distance;
+ }
+ }
+
+ for (int32_t y = 0; y < 16; ++y)
+ {
+ for (int32_t x = 0; x < 16; ++x)
+ {
+ float* r = &rgbaf32Pixels[(x + (kTextureSize - 36 + y) * kTextureSize) * 4];
+ r[0] = 1.0f;
+ r[1] = 0.0f;
+ r[2] = 0.0f;
+ r[3] = 1.0f;
+
+ float* g = &rgbaf32Pixels[(x + 16 + (kTextureSize - 36 + y) * kTextureSize) * 4];
+ g[0] = 0.0f;
+ g[1] = 1.0f;
+ g[2] = 0.0f;
+ g[3] = 1.0f;
+
+ float* b = &rgbaf32Pixels[(x + 32 + (kTextureSize - 36 + y) * kTextureSize) * 4];
+ b[0] = 0.0f;
+ b[1] = 0.0f;
+ b[2] = 1.0f;
+ b[3] = 1.0f;
+ }
+ }
+
+ for (int32_t y = 0; y < 16; ++y)
+ {
+ for (int32_t x = 0; x < 48; ++x)
+ {
+ float* a = &rgbaf32Pixels[(x + (kTextureSize - 20 + y) * kTextureSize) * 4];
+ a[0] = 1.0f;
+ a[1] = 1.0f;
+ a[2] = 1.0f;
+ a[3] = 1.0f - (float)x / 48.0f;
+ }
+ }
+
+ return image;
+}
+
+static void textureSetPopulateCompressedFormat(TextureSet& textureSet, bimg::ImageContainer* source, bool freeImage = true)
+{
+ if (NULL == source)
+ {
+ return;
+ }
+
+ uint32_t textureIndex = indexToFormat(source->m_format);
+ Texture& texture = textureSet.m_textures[textureIndex];
+
+ if (bgfx::isValid(texture.m_texture) || texture.m_status == TextureStatus::FormatNotSupported)
+ {
+ if (freeImage)
+ {
+ bimg::imageFree(source);
+ }
+
+ return;
+ }
+
+ bimg::ImageMip mip0;
+ bimg::imageGetRawData(
+ *source
+ , 0
+ , 0
+ , source->m_data
+ , source->m_size
+ , mip0
+ );
+
+ texture.m_width = uint16_t(mip0.m_width);
+ texture.m_height = uint16_t(mip0.m_height);
+ texture.m_status = TextureStatus::Ok;
+ texture.m_texture = bgfx::createTexture2D(
+ uint16_t(mip0.m_width)
+ , uint16_t(mip0.m_height)
+ , false
+ , 1
+ , bgfx::TextureFormat::Enum(mip0.m_format)
+ , BGFX_SAMPLER_MIN_POINT | BGFX_SAMPLER_MAG_POINT
+ , bgfx::copy(mip0.m_data, mip0.m_size)
+ );
+
+ bgfx::setName(texture.m_texture, bimg::getName(source->m_format) );
+
+ if (freeImage)
+ {
+ bimg::imageFree(source);
+ }
+
+ textureSet.m_maxWidth = bx::max(textureSet.m_maxWidth, texture.m_width);
+ textureSet.m_maxHeight = bx::max(textureSet.m_maxHeight, texture.m_height);
+}
+
+static void textureSetPopulateUncompressedFormats(TextureSet& textureSet, bimg::ImageContainer* source, bool freeImage = true)
+{
+ if (NULL == source)
+ {
+ return;
+ }
+
+ const uint32_t flags = 0
+ | BGFX_SAMPLER_MIN_POINT
+ | BGFX_SAMPLER_MAG_POINT
+ ;
+
+ for (int32_t i = 0; i < kNumUncompressedFormats; ++i)
+ {
+ int32_t textureIndex = kNumCompressedFormats + i;
+
+ Texture& texture = textureSet.m_textures[textureIndex];
+
+ if (bgfx::isValid(texture.m_texture) || texture.m_status == TextureStatus::FormatNotSupported)
+ {
+ continue;
+ }
+
+ bimg::TextureFormat::Enum format = indexToFormat(textureIndex);
+ const char* formatName = bimg::getName(format);
+ int32_t formatNameLen = bx::strLen(formatName);
+
+ if (!bimg::imageConvert(format, source->m_format) )
+ {
+ texture.m_status = TextureStatus::ConversionNotSupported;
+ continue;
+ }
+
+ if ( formatName[formatNameLen - 1] == 'I'
+ || formatName[formatNameLen - 1] == 'U')
+ {
+ texture.m_status = TextureStatus::FormatIgnored;
+ continue;
+ }
+
+ bimg::TextureInfo info;
+ bimg::imageGetSize(
+ &info
+ , uint16_t(source->m_width)
+ , uint16_t(source->m_height)
+ , 1
+ , false
+ , false
+ , 1
+ , format
+ );
+
+ const bgfx::Memory* mem = bgfx::alloc(info.storageSize);
+ bimg::imageConvert(
+ entry::getAllocator()
+ , mem->data
+ , info.format
+ , source->m_data
+ , source->m_format
+ , source->m_width
+ , source->m_height
+ , 1
+ );
+
+ texture.m_width = info.width;
+ texture.m_height = info.height;
+ texture.m_status = TextureStatus::Ok;
+ texture.m_texture = bgfx::createTexture2D(
+ info.width
+ , info.height
+ , info.numMips > 1
+ , info.numLayers
+ , bgfx::TextureFormat::Enum(info.format)
+ , flags
+ , mem
+ );
+
+ bgfx::setName(texture.m_texture, formatName);
+
+ textureSet.m_maxWidth = bx::max(textureSet.m_maxWidth, texture.m_width);
+ textureSet.m_maxHeight = bx::max(textureSet.m_maxHeight, texture.m_height);
+ }
+
+ if (freeImage)
+ {
+ bimg::imageFree(source);
+ }
+}
+
+static TextureSet makeEmptyTextureSet(const char* name)
+{
+ TextureSet textureSet;
+ textureSet.m_name = name;
+
+ for (int32_t i = 0; i < kNumFormats; ++i)
+ {
+ bimg::TextureFormat::Enum format = indexToFormat(i);
+
+ if (!bgfx::isTextureValid(
+ 1
+ , false
+ , 1
+ , bgfx::TextureFormat::Enum(format)
+ , BGFX_TEXTURE_NONE
+ ) )
+ {
+ textureSet.m_textures[i].m_status = TextureStatus::FormatNotSupported;
+ }
+ }
+
+ return textureSet;
+}
+
+static TextureSet generateTextureSetFromImage(const char* name, bimg::ImageContainer* source, bool freeImage = true)
+{
+ TextureSet textureSet = makeEmptyTextureSet(name);
+
+ if (NULL == source)
+ {
+ return textureSet;
+ }
+
+ textureSetPopulateUncompressedFormats(textureSet, source, freeImage);
+
+ return textureSet;
+}
+
+static TextureSet generateTextureSetFromFileSet(const char* name, const char* filePaths[])
+{
+ TextureSet textureSet = makeEmptyTextureSet(name);
+
+ while (NULL != *filePaths)
+ {
+ const char* filePath = *filePaths++;
+
+ uint32_t size;
+ void* data = load(filePath, &size);
+ if (NULL == data)
+ {
+ continue;
+ }
+
+ bimg::ImageContainer* image = bimg::imageParse(entry::getAllocator(), data, size);
+ if (NULL == image)
+ {
+ unload(data);
+ continue;
+ }
+
+ if (bimg::isCompressed(image->m_format) )
+ {
+ textureSet.m_hasCompressedTextures = true;
+
+ textureSetPopulateCompressedFormat(textureSet, image);
+ }
+ else
+ {
+ textureSetPopulateUncompressedFormats(textureSet, image);
+ }
+ }
+
+ return textureSet;
+}
+
+static TextureSet generateTextureSetFromFile(const char* filePath)
+{
+ const char* filePaths[] =
+ {
+ filePath,
+ nullptr
+ };
+
+ return generateTextureSetFromFileSet(bx::FilePath(filePath).getFileName().getPtr(), filePaths);
+}
+
+class ExamplePixelFormats : public entry::AppI
+{
+public:
+ ExamplePixelFormats(const char* _name, const char* _description, const char* _url)
+ : entry::AppI(_name, _description, _url)
+ {
+ }
+
+ void init(int32_t _argc, const char* const* _argv, uint32_t _width, uint32_t _height) override
+ {
+ Args args(_argc, _argv);
+
+ m_width = _width;
+ m_height = _height;
+ m_debug = BGFX_DEBUG_TEXT;
+ m_reset = BGFX_RESET_VSYNC;
+
+ bgfx::Init init;
+ init.type = args.m_type;
+ init.vendorId = args.m_pciId;
+ init.platformData.nwh = entry::getNativeWindowHandle(entry::kDefaultWindowHandle);
+ init.platformData.ndt = entry::getNativeDisplayHandle();
+ init.platformData.type = entry::getNativeWindowHandleType(entry::kDefaultWindowHandle);
+ init.resolution.width = m_width;
+ init.resolution.height = m_height;
+ init.resolution.reset = m_reset;
+ bgfx::init(init);
+
+ // Enable debug text.
+ bgfx::setDebug(m_debug);
+
+ // Set view 0 clear state.
+ bgfx::setViewClear(0
+ , BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
+ , 0x303030ff
+ , 1.0f
+ , 0
+ );
+
+ const bgfx::Memory* checkerboardImageMemory = bgfx::alloc(kCheckerboardSize * kCheckerboardSize * 4);
+ bimg::imageCheckerboard(
+ checkerboardImageMemory->data
+ , kCheckerboardSize
+ , kCheckerboardSize
+ , 16
+ , 0xFF909090
+ , 0xFF707070
+ );
+ m_checkerboard = bgfx::createTexture2D(
+ kCheckerboardSize
+ , kCheckerboardSize
+ , false
+ , 1
+ , bgfx::TextureFormat::RGBA8
+ , BGFX_SAMPLER_MIN_POINT | BGFX_SAMPLER_MAG_POINT
+ , checkerboardImageMemory
+ );
+
+ m_textureSets.push_back(generateTextureSetFromImage("Hue Wheel", generateHueWheelImage() ) );
+ m_textureSets.push_back(generateTextureSetFromFile("textures/pf_alpha_test.dds") );
+ m_textureSets.push_back(generateTextureSetFromFile("textures/pf_uv_filtering_test.dds") );
+ const char* textureCompressionSetFiles[] =
+ {
+ "textures/texture_compression_astc_4x4.dds",
+ "textures/texture_compression_astc_5x4.dds",
+ "textures/texture_compression_astc_5x5.dds",
+ "textures/texture_compression_astc_6x5.dds",
+ "textures/texture_compression_astc_6x6.dds",
+ "textures/texture_compression_astc_8x5.dds",
+ "textures/texture_compression_astc_8x6.dds",
+ "textures/texture_compression_astc_8x8.dds",
+ "textures/texture_compression_astc_10x5.dds",
+ "textures/texture_compression_astc_10x6.dds",
+ "textures/texture_compression_astc_10x8.dds",
+ "textures/texture_compression_astc_10x10.dds",
+ "textures/texture_compression_astc_12x10.dds",
+ "textures/texture_compression_astc_12x12.dds",
+ "textures/texture_compression_atc.dds",
+ "textures/texture_compression_atce.dds",
+ "textures/texture_compression_atci.dds",
+ "textures/texture_compression_bc1.ktx",
+ "textures/texture_compression_bc2.ktx",
+ "textures/texture_compression_bc3.ktx",
+ "textures/texture_compression_bc7.ktx",
+ "textures/texture_compression_etc1.ktx",
+ "textures/texture_compression_etc2.ktx",
+ "textures/texture_compression_ptc12.pvr",
+ "textures/texture_compression_ptc14.pvr",
+ "textures/texture_compression_ptc22.pvr",
+ "textures/texture_compression_ptc24.pvr",
+ "textures/texture_compression_rgba8.dds",
+ nullptr
+ };
+ m_textureSets.push_back(generateTextureSetFromFileSet("texture_compression_* set", textureCompressionSetFiles));
+
+ m_currentTextureSet = &m_textureSets[0];
+
+ for (auto& textureSet : m_textureSets)
+ {
+ m_largestTextureSize = bx::max(m_largestTextureSize, float(bx::max(textureSet.m_maxWidth, textureSet.m_maxHeight)));
+ }
+
+ imguiCreate();
+ }
+
+ int32_t shutdown() override
+ {
+ imguiDestroy();
+
+ for (auto& textureSet : m_textureSets)
+ {
+ for (auto texture : textureSet.m_textures)
+ {
+ if (bgfx::isValid(texture.m_texture) )
+ {
+ bgfx::destroy(texture.m_texture);
+ }
+ }
+ }
+
+ if (bgfx::isValid(m_checkerboard) )
+ {
+ bgfx::destroy(m_checkerboard);
+ }
+
+ // Shutdown bgfx.
+ bgfx::shutdown();
+
+ return 0;
+ }
+
+ void imguiTextBoxUnformatted(const ImVec2& size, const char* text) const
+ {
+ ImVec2 textSize = ImGui::CalcTextSize(text);
+ ImVec2 textOffset = ImVec2(
+ size.x >= 0.0f ? bx::max( (size.x - textSize.x) / 2, 0.0f) : 0.0f
+ , size.y >= 0.0f ? bx::max( (size.y - textSize.y) / 2, 0.0f) : 0.0f
+ );
+ ImGui::SetCursorPos(ImVec2(
+ ImGui::GetCursorPosX() + textOffset.x
+ , ImGui::GetCursorPosY() + textOffset.y
+ ) );
+ ImGui::TextUnformatted(text);
+ };
+
+ void imguiStrikethroughItem()
+ {
+ ImVec2 itemSize = ImGui::GetItemRectSize();
+ if (itemSize.x <= 0.0f || itemSize.y <= 0.0f)
+ return;
+
+ ImVec2 p0 = ImGui::GetItemRectMin();
+ ImVec2 p1 = ImGui::GetItemRectMax();
+ p0.y = p1.y = p0.y + itemSize.y * 0.5f;
+
+ ImGui::GetWindowDrawList()->AddLine(p0, p1, ImGui::GetColorU32(ImGuiCol_Text) );
+ }
+
+ void imguiTexturePreview(const ImVec2& size, bgfx::TextureHandle texture, const ImVec2& previewSizeHint = ImVec2(-1.0f, -1.0f) ) const
+ {
+ ImVec2 origin = ImGui::GetCursorScreenPos();
+
+ ImVec2 previewSize = ImVec2(
+ previewSizeHint.x >= 0.0f ? previewSizeHint.x : size.x
+ , previewSizeHint.y >= 0.0f ? previewSizeHint.y : size.y
+ );
+
+ ImVec2 previewPos = ImVec2(
+ origin.x + bx::max(0.0f, (size.x - previewSize.x) / 2)
+ , origin.y + bx::max(0.0f, (size.y - previewSize.y) / 2)
+ );
+
+ if (bgfx::isValid(texture) )
+ {
+ if (bgfx::isValid(m_checkerboard) )
+ {
+ static int64_t timeOffset = bx::getHPCounter();
+ const float time = float( (bx::getHPCounter()-timeOffset)/double(bx::getHPFrequency() ) );
+ const float animate = float(m_animate)*0.5f;
+ const float xx = bx::sin(time * 0.37f) * animate;
+ const float yy = bx::cos(time * 0.43f) * animate;
+
+ const float uTile = bx::max(1.0f, previewSize.x / kCheckerboardSize);
+ const float vTile = bx::max(1.0f, previewSize.y / kCheckerboardSize);
+
+ ImGui::SetCursorScreenPos(previewPos);
+ ImGui::Image(m_checkerboard, previewSize, ImVec2(xx, yy), ImVec2(xx+uTile, yy+vTile) );
+ }
+
+ ImGui::SetCursorScreenPos(previewPos);
+ ImGui::Image(texture, m_useAlpha ? IMGUI_FLAGS_ALPHA_BLEND : IMGUI_FLAGS_NONE, 0, previewSize);
+ }
+ else
+ {
+ ImU32 color = ImGui::GetColorU32(ImGuiCol_Text, 0.25f);
+
+ ImDrawList* drawList = ImGui::GetWindowDrawList();
+ ImVec2 p0 = previewPos;
+ ImVec2 p1 = ImVec2(p0.x + previewSize.x, p0.y + previewSize.y);
+ drawList->AddRect(p0, p1, color);
+ drawList->AddLine(p0, p1, color);
+ }
+
+ ImGui::SetCursorScreenPos(origin);
+ ImGui::Dummy(size);
+ };
+
+ bool update() override
+ {
+ if (!entry::processEvents(m_width, m_height, m_debug, m_reset, &m_mouseState) )
+ {
+ imguiBeginFrame(m_mouseState.m_mx
+ , m_mouseState.m_my
+ , (m_mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
+ | (m_mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
+ | (m_mouseState.m_buttons[entry::MouseButton::Middle] ? IMGUI_MBUT_MIDDLE : 0)
+ , m_mouseState.m_mz
+ , uint16_t(m_width)
+ , uint16_t(m_height)
+ );
+
+ showExampleDialog(this);
+
+ ImGui::SetNextWindowPos(ImVec2(360.0f, 40.0f), ImGuiCond_FirstUseEver);
+ ImGui::Begin("Formats", NULL, ImGuiWindowFlags_AlwaysAutoResize);
+
+ ImVec2 previewSize = ImVec2(m_previewSize, m_previewSize);
+ if (m_currentTextureSet->m_maxWidth > m_currentTextureSet->m_maxHeight)
+ previewSize.y /= float(m_currentTextureSet->m_maxWidth) / m_currentTextureSet->m_maxHeight;
+ else if (m_currentTextureSet->m_maxWidth < m_currentTextureSet->m_maxHeight)
+ previewSize.x *= float(m_currentTextureSet->m_maxWidth) / m_currentTextureSet->m_maxHeight;
+
+ float cellWidth = previewSize.x;
+ for (int32_t i = 0; i < kNumFormats; ++i)
+ {
+ int32_t format = indexToFormat(i);
+ ImVec2 textSize = ImGui::CalcTextSize(bimg::getName(bimg::TextureFormat::Enum(format) ) );
+ cellWidth = bx::max(cellWidth, textSize.x);
+ }
+
+ ImDrawList* drawList = ImGui::GetWindowDrawList();
+
+ if (ImGui::BeginCombo("Sample", m_currentTextureSet ? m_currentTextureSet->m_name.c_str() : nullptr))
+ {
+ for (auto& textureSet : m_textureSets)
+ {
+ bool isSelected = (&textureSet == m_currentTextureSet);
+ if (ImGui::Selectable(textureSet.m_name.c_str(), &isSelected))
+ {
+ m_currentTextureSet = &textureSet;
+ if (!m_currentTextureSet->m_hasCompressedTextures && formatToIndex(m_selectedFormat) < kNumCompressedFormats)
+ m_selectedFormat = bimg::TextureFormat::RGBA8;
+ }
+ }
+ ImGui::EndCombo();
+ }
+ ImGui::DragFloat("Preview Size", &m_previewSize, 1.0f, 10.0f, m_largestTextureSize, "%.0f px");
+ ImGui::SameLine();
+ ImGui::Checkbox("Alpha", &m_useAlpha);
+ ImGui::SameLine();
+ ImGui::Checkbox("Animate", &m_animate);
+ ImGui::BeginTable("Formats", kNumFormatsInRow, ImGuiTableFlags_Borders | ImGuiTableFlags_SizingFixedFit);
+
+ for (int32_t i = m_currentTextureSet->m_hasCompressedTextures ? 0 : kNumCompressedFormats; i < kNumFormats; ++i)
+ {
+ ImGui::TableNextColumn();
+
+ bimg::TextureFormat::Enum format = indexToFormat(i);
+ const Texture& texture = m_currentTextureSet->m_textures[i];
+
+ bool isSelected = (m_selectedFormat == format);
+ bool isFormatSupported = texture.m_status == TextureStatus::Ok;
+ bool isError = TextureStatus::isError(texture.m_status);
+ ImU32 labelColor = isError ? IM_COL32(255, 96, 96, 255) : ImGui::GetColorU32(isFormatSupported ? ImGuiCol_Text : ImGuiCol_TextDisabled);
+
+ ImDrawListSplitter splitter;
+ splitter.Split(drawList, 2);
+ splitter.SetCurrentChannel(drawList, 1);
+
+ ImGui::BeginGroup();
+ ImGuiTextBuffer label;
+ label.append(bimg::getName(bimg::TextureFormat::Enum(format) ) );
+ ImGui::PushStyleColor(ImGuiCol_Text, labelColor);
+ imguiTextBoxUnformatted(ImVec2(cellWidth, 0.0f), label.c_str() );
+ if (TextureStatus::isError(texture.m_status) )
+ {
+ imguiStrikethroughItem();
+ }
+ imguiTexturePreview(ImVec2(cellWidth, previewSize.y), m_currentTextureSet->m_textures[i].m_texture, previewSize );
+ ImGui::PopStyleColor();
+ ImGui::EndGroup();
+ if (!isFormatSupported && ImGui::IsItemHovered() )
+ {
+ ImGui::SetTooltip("%s", TextureStatus::getDescription(texture.m_status) );
+ }
+
+ splitter.SetCurrentChannel(drawList, 0);
+ ImGui::SetCursorScreenPos(ImGui::GetItemRectMin() );
+
+ ImGui::PushID(i);
+
+ if (ImGui::Selectable(
+ "##selectable"
+ , &isSelected
+ , ImGuiSelectableFlags_AllowItemOverlap
+ , ImGui::GetItemRectSize()
+ ) )
+ {
+ m_selectedFormat = format;
+ }
+
+ ImGui::PopID();
+
+ splitter.Merge(drawList);
+ }
+
+ ImGui::EndTable();
+ ImGui::End();
+
+ {
+ int32_t selectedTextureIndex = formatToIndex(m_selectedFormat);
+ const Texture& texture = m_currentTextureSet->m_textures[selectedTextureIndex];
+
+ ImGui::SetNextWindowPos(ImVec2(10.0f, 280.0f), ImGuiCond_FirstUseEver);
+ ImGui::Begin("Selected Format", NULL, ImGuiWindowFlags_AlwaysAutoResize);
+ ImGui::Text("Format: %s", bimg::getName(m_selectedFormat) );
+ ImGui::Text("Status: %s", TextureStatus::getDescription(texture.m_status) );
+
+ const bgfx::Caps* caps = bgfx::getCaps();
+
+ const uint32_t formatFlags = caps->formats[m_selectedFormat];
+
+ {
+ bool emulated = 0 != (formatFlags & (0
+ | BGFX_CAPS_FORMAT_TEXTURE_2D_EMULATED
+ | BGFX_CAPS_FORMAT_TEXTURE_3D_EMULATED
+ | BGFX_CAPS_FORMAT_TEXTURE_CUBE_EMULATED
+ ) );
+ ImGui::PushEnabled(false);
+ ImGui::Checkbox("Emu", &emulated);
+ ImGui::PopEnabled();
+ if (ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenDisabled))
+ {
+ ImGui::SetTooltip("Texture format is%s emulated.", emulated ? "" : " not");
+ }
+ ImGui::SameLine();
+
+ bool framebuffer = 0 != (formatFlags & BGFX_CAPS_FORMAT_TEXTURE_FRAMEBUFFER);
+ ImGui::PushEnabled(false);
+ ImGui::Checkbox("FB", &framebuffer);
+ ImGui::PopEnabled();
+ if (ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenDisabled))
+ {
+ ImGui::SetTooltip("Texture format can%s be used as frame buffer.", framebuffer ? "" : "not");
+ }
+ ImGui::SameLine();
+
+ bool msaa = 0 != (formatFlags & BGFX_CAPS_FORMAT_TEXTURE_MSAA);
+ ImGui::PushEnabled(false);
+ ImGui::Checkbox("MSAA", &msaa);
+ ImGui::PopEnabled();
+ if (ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenDisabled))
+ {
+ ImGui::SetTooltip("Texture can%s be sampled as MSAA.", msaa ? "" : "not");
+ }
+ }
+
+ ImVec2 size = ImVec2(float(m_currentTextureSet->m_maxWidth), float(m_currentTextureSet->m_maxHeight) );
+ ImVec2 selectedPreviewSize = bgfx::isValid(texture.m_texture) ? ImVec2(float(texture.m_width), float(texture.m_height) ) : size;
+
+ imguiTexturePreview(size, texture.m_texture, selectedPreviewSize);
+ ImGui::End();
+ }
+
+ imguiEndFrame();
+
+ // Set view 0 default viewport.
+ bgfx::setViewRect(0, 0, 0, uint16_t(m_width), uint16_t(m_height) );
+
+ // This dummy draw call is here to make sure that view 0 is cleared
+ // if no other draw calls are submitted to viewZ 0.
+ bgfx::touch(0);
+
+ // Advance to next frame. Rendering thread will be kicked to
+ // process submitted rendering primitives.
+ bgfx::frame();
+
+ return true;
+ }
+
+ return false;
+ }
+
+ entry::MouseState m_mouseState;
+
+ uint32_t m_width;
+ uint32_t m_height;
+ uint32_t m_debug;
+ uint32_t m_reset;
+ float m_largestTextureSize = 256.0f;
+ float m_previewSize = 50.0f;
+ bool m_useAlpha = true;
+ bool m_animate = true;
+ bimg::TextureFormat::Enum m_selectedFormat = bimg::TextureFormat::RGBA8;
+
+ bgfx::TextureHandle m_checkerboard = BGFX_INVALID_HANDLE;
+ stl::vector<TextureSet> m_textureSets;
+ TextureSet* m_currentTextureSet = NULL;
+};
+
+} // namespace
+
+ENTRY_IMPLEMENT_MAIN(
+ ExamplePixelFormats
+ , "47-pixelformats"
+ , "Texture formats."
+ , "https://bkaradzic.github.io/bgfx/examples.html#pixelformats"
+ );