bgfx/examples/47-pixelformats/pixelformats.cpp

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/*
* 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);
}
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if (index >= kNumCompressedFormats && index < kNumFormats)
{
return bimg::TextureFormat::Enum(index + 1);
}
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return bimg::TextureFormat::Unknown;
}
struct TextureStatus
{
enum Enum
{
Ok,
NotInitialized,
FormatNotSupported,
ConversionNotSupported,
FormatIgnored
};
inline static const char* getDescription(Enum value)
{
switch (value)
{
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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";
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case FormatIgnored: return "Format is ignored by this example";
}
return "Unknown";
}
inline static bool isError(Enum value)
{
return value == FormatNotSupported
|| value == ConversionNotSupported
;
}
};
struct Texture
{
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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;
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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;
}
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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
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);
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
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);
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
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);
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
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, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
, 0x303030ff
, 1.0f
, 0
);
const bgfx::Memory* checkerboardImageMemory = bgfx::alloc(kCheckerboardSize * kCheckerboardSize * 4);
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bimg::imageCheckerboard(
checkerboardImageMemory->data
, kCheckerboardSize
, kCheckerboardSize
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, 16
, 0xFF909090
, 0xFF707070
);
m_checkerboard = bgfx::createTexture2D(
kCheckerboardSize
, kCheckerboardSize
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, false
, 1
, bgfx::TextureFormat::RGBA8
, BGFX_SAMPLER_MIN_POINT | BGFX_SAMPLER_MAG_POINT
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, 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();
}
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int32_t shutdown() override
{
imguiDestroy();
for (auto& textureSet : m_textureSets)
{
for (auto texture : textureSet.m_textures)
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{
if (bgfx::isValid(texture.m_texture) )
{
bgfx::destroy(texture.m_texture);
}
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}
}
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if (bgfx::isValid(m_checkerboard) )
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{
bgfx::destroy(m_checkerboard);
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}
// Shutdown bgfx.
bgfx::shutdown();
return 0;
}
void imguiTextBoxUnformatted(const ImVec2& size, const char* text) const
{
ImVec2 textSize = ImGui::CalcTextSize(text);
ImVec2 textOffset = ImVec2(
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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) );
}
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void imguiTexturePreview(const ImVec2& size, bgfx::TextureHandle texture, const ImVec2& previewSizeHint = ImVec2(-1.0f, -1.0f) ) const
{
ImVec2 origin = ImGui::GetCursorScreenPos();
ImVec2 previewSize = ImVec2(
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previewSizeHint.x >= 0.0f ? previewSizeHint.x : size.x
, previewSizeHint.y >= 0.0f ? previewSizeHint.y : size.y
);
ImVec2 previewPos = ImVec2(
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origin.x + bx::max(0.0f, (size.x - previewSize.x) / 2)
, origin.y + bx::max(0.0f, (size.y - previewSize.y) / 2)
);
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if (bgfx::isValid(texture) )
{
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if (bgfx::isValid(m_checkerboard) )
{
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static int64_t timeOffset = bx::getHPCounter();
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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);
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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);
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ImGui::Begin("Formats", NULL, ImGuiWindowFlags_AlwaysAutoResize);
ImVec2 previewSize = ImVec2(m_previewSize, m_previewSize);
if (m_currentTextureSet->m_maxWidth > m_currentTextureSet->m_maxHeight)
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{
previewSize.y /= float(m_currentTextureSet->m_maxWidth) / m_currentTextureSet->m_maxHeight;
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}
else if (m_currentTextureSet->m_maxWidth < m_currentTextureSet->m_maxHeight)
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{
previewSize.x *= float(m_currentTextureSet->m_maxWidth) / m_currentTextureSet->m_maxHeight;
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}
float cellWidth = previewSize.x;
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for (int32_t i = 0; i < kNumFormats; ++i)
{
int32_t format = indexToFormat(i);
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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)
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{
m_selectedFormat = bimg::TextureFormat::RGBA8;
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}
}
}
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ImGui::EndCombo();
}
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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);
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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;
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label.append(bimg::getName(bimg::TextureFormat::Enum(format) ) );
ImGui::PushStyleColor(ImGuiCol_Text, labelColor);
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imguiTextBoxUnformatted(ImVec2(cellWidth, 0.0f), label.c_str() );
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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);
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ImGui::SetCursorScreenPos(ImGui::GetItemRectMin() );
ImGui::PushID(i);
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if (ImGui::Selectable(
"##selectable"
, &isSelected
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, ImGuiSelectableFlags_AllowOverlap
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, ImGui::GetItemRectSize()
) )
{
m_selectedFormat = format;
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}
ImGui::PopID();
splitter.Merge(drawList);
}
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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) );
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const bgfx::Caps* caps = bgfx::getCaps();
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const uint32_t formatFlags = caps->formats[m_selectedFormat];
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{
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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))
{
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ImGui::SetTooltip("Texture format is%s emulated.", emulated ? "" : " not");
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}
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))
{
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ImGui::SetTooltip("Texture format can%s be used as frame buffer.", framebuffer ? "" : "not");
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}
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))
{
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ImGui::SetTooltip("Texture can%s be sampled as MSAA.", msaa ? "" : "not");
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}
}
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();
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// 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"
);