457 lines
12 KiB
C++
457 lines
12 KiB
C++
/*
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* Copyright 2022-2022 Sandy Carter. All rights reserved.
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* License: https://github.com/bkaradzic/bgfx/blob/master/LICENSE
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*/
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#include "common.h"
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#include "bgfx_utils.h"
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#include "imgui/imgui.h"
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#include <bx/allocator.h>
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#include <bx/math.h>
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namespace
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{
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constexpr int32_t kTextureSize = 256;
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constexpr int32_t kHalfTextureSize = kTextureSize / 2;
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constexpr int32_t kNumFormats = bgfx::TextureFormat::UnknownDepth - bgfx::TextureFormat::Unknown - 1;
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const int32_t kNumFormatsInRow = (int32_t)bx::ceil(bx::sqrt(kNumFormats) );
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class ExamplePixelFormats : public entry::AppI
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{
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public:
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ExamplePixelFormats(const char* _name, const char* _description, const char* _url)
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: entry::AppI(_name, _description, _url)
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{
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}
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void init(int32_t _argc, const char* const* _argv, uint32_t _width, uint32_t _height) override
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{
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Args args(_argc, _argv);
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m_width = _width;
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m_height = _height;
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m_debug = BGFX_DEBUG_TEXT;
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m_reset = BGFX_RESET_VSYNC;
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bgfx::Init init;
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init.type = args.m_type;
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init.vendorId = args.m_pciId;
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init.resolution.width = m_width;
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init.resolution.height = m_height;
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init.resolution.reset = m_reset;
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bgfx::init(init);
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// Enable debug text.
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bgfx::setDebug(m_debug);
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// Set view 0 clear state.
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bgfx::setViewClear(0
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, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
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, 0x303030ff
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, 1.0f
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, 0
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);
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const uint32_t flags = 0
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| BGFX_SAMPLER_MIN_POINT
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| BGFX_SAMPLER_MAG_POINT
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;
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float* rgbaf32Pixels = (float*)BX_ALLOC(entry::getAllocator(), kTextureSize * kTextureSize * 4 * sizeof(float) );
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for (int32_t y = 0 ; y < kTextureSize; ++y)
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{
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for (int32_t x = 0; x < kTextureSize; ++x)
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{
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float relX = (x - kHalfTextureSize) / (float) kHalfTextureSize;
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float relY = (y - kHalfTextureSize) / (float) kHalfTextureSize;
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float distance = bx::min(1.0f, bx::sqrt(relX * relX + relY * relY) );
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float angle = bx::atan2(relY, relX);
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float* pixel = &rgbaf32Pixels[(x + y * kTextureSize) * 4];
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float hsv[3] = {angle / (2.0f * bx::kPi), 1.0f, 1.0f - distance};
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bx::hsvToRgb(pixel, hsv);
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pixel[3] = 1.0f - distance;
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}
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}
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for (int32_t y = 0; y < 16; ++y)
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{
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for (int32_t x = 0; x < 16; ++x)
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{
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float* r = &rgbaf32Pixels[(x + (kTextureSize - 36 + y) * kTextureSize) * 4];
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r[0] = 1.0f;
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r[1] = 0.0f;
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r[2] = 0.0f;
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r[3] = 1.0f;
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float* g = &rgbaf32Pixels[(x + 16 + (kTextureSize - 36 + y) * kTextureSize) * 4];
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g[0] = 0.0f;
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g[1] = 1.0f;
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g[2] = 0.0f;
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g[3] = 1.0f;
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float* b = &rgbaf32Pixels[(x + 32 + (kTextureSize - 36 + y) * kTextureSize) * 4];
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b[0] = 0.0f;
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b[1] = 0.0f;
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b[2] = 1.0f;
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b[3] = 1.0f;
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}
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}
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for (int32_t y = 0; y < 16; ++y)
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{
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for (int32_t x = 0; x < 48; ++x)
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{
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float* a = &rgbaf32Pixels[(x + (kTextureSize - 20 + y) * kTextureSize) * 4];
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a[0] = 1.0f;
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a[1] = 1.0f;
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a[2] = 1.0f;
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a[3] = 1.0f - (float)x / 48.0f;
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}
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}
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for (int32_t i = 0; i < kNumFormats; ++i)
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{
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int32_t format = (int32_t)bgfx::TextureFormat::Unknown + 1 + i;
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const char* formatName = bimg::getName(bimg::TextureFormat::Enum(format) );
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int32_t formatNameLen = bx::strLen(formatName);
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if (!bimg::imageConvert(bimg::TextureFormat::Enum(format), bimg::TextureFormat::RGBA32F)
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|| formatName[formatNameLen - 1] == 'I'
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|| formatName[formatNameLen - 1] == 'U'
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)
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{
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m_textures[i] = BGFX_INVALID_HANDLE;
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continue;
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}
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bimg::TextureInfo info;
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bimg::imageGetSize(
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&info
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, kTextureSize
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, kTextureSize
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, 1
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, false
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, false
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, 1
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, bimg::TextureFormat::Enum(format)
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);
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const bgfx::Memory* mem = bgfx::alloc(info.storageSize);
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bimg::imageConvert(
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entry::getAllocator()
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, mem->data
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, info.format
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, rgbaf32Pixels
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, bimg::TextureFormat::RGBA32F
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, kTextureSize
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, kTextureSize
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, 1
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);
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m_textures[i] = bgfx::createTexture2D(
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info.width
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, info.height
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, info.numMips > 1
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, info.numLayers
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, bgfx::TextureFormat::Enum(info.format)
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, flags
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, mem
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);
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bgfx::setName(m_textures[i], formatName);
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bgfx::setViewName(bgfx::ViewId(i + 1), formatName);
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}
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const bgfx::Memory* checkerboardImageMemory = bgfx::alloc(kTextureSize * kTextureSize * 4);
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bimg::imageCheckerboard(
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checkerboardImageMemory->data
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, kTextureSize
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, kTextureSize
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, 16
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, 0xFF909090
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, 0xFF707070
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);
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m_checkerboard = bgfx::createTexture2D(
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kTextureSize
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, kTextureSize
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, false
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, 1
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, bgfx::TextureFormat::RGBA8
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, flags
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, checkerboardImageMemory
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);
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BX_FREE(entry::getAllocator(), rgbaf32Pixels);
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imguiCreate();
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}
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int32_t shutdown() override
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{
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imguiDestroy();
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for (auto texture : m_textures)
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{
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if (bgfx::isValid(texture) )
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{
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bgfx::destroy(texture);
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}
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}
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if (bgfx::isValid(m_checkerboard) )
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{
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bgfx::destroy(m_checkerboard);
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}
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// Shutdown bgfx.
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bgfx::shutdown();
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return 0;
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}
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void imguiTextBoxUnformatted(const ImVec2& size, const char* text) const
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{
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ImVec2 textSize = ImGui::CalcTextSize(text);
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ImVec2 textOffset = ImVec2(
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size.x >= 0.0f ? bx::max( (size.x - textSize.x) / 2, 0.0f) : 0.0f
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, size.y >= 0.0f ? bx::max( (size.y - textSize.y) / 2, 0.0f) : 0.0f
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);
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ImGui::SetCursorPos(ImVec2(
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ImGui::GetCursorPosX() + textOffset.x
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, ImGui::GetCursorPosY() + textOffset.y
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) );
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ImGui::TextUnformatted(text);
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};
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void imguiTexturePreview(const ImVec2& size, bgfx::TextureHandle texture, const ImVec2& previewSizeHint = ImVec2(-1.0f, -1.0f) ) const
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{
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ImVec2 origin = ImGui::GetCursorScreenPos();
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ImVec2 previewSize = ImVec2(
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previewSizeHint.x >= 0.0f ? previewSizeHint.x : size.x
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, previewSizeHint.y >= 0.0f ? previewSizeHint.y : size.y
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);
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ImVec2 previewPos = ImVec2(
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origin.x + bx::max(0.0f, (size.x - previewSize.x) / 2)
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, origin.y + bx::max(0.0f, (size.y - previewSize.y) / 2)
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);
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if (bgfx::isValid(texture) )
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{
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if (bgfx::isValid(m_checkerboard) )
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{
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static int64_t timeOffset = bx::getHPCounter();
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const float time = float( (bx::getHPCounter()-timeOffset)/double(bx::getHPFrequency() ) );
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const float xx = bx::sin(time * 0.17f);
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const float yy = bx::cos(time * 0.13f);
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ImGui::SetCursorScreenPos(previewPos);
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ImGui::Image(m_checkerboard, previewSize, ImVec2(xx, yy), ImVec2(xx+1.0f, yy+1.0f) );
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}
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ImGui::SetCursorScreenPos(previewPos);
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ImGui::Image(texture, m_useAlpha ? IMGUI_FLAGS_ALPHA_BLEND : IMGUI_FLAGS_NONE, 0, previewSize);
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}
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else
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{
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ImU32 color = ImGui::GetColorU32(ImGuiCol_TextDisabled, 0.25f);
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ImDrawList* drawList = ImGui::GetWindowDrawList();
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ImVec2 p0 = previewPos;
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ImVec2 p1 = ImVec2(p0.x + previewSize.x, p0.y + previewSize.y);
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drawList->AddRect(p0, p1, color);
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drawList->AddLine(p0, p1, color);
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}
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ImGui::SetCursorScreenPos(origin);
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ImGui::Dummy(size);
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};
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bool update() override
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{
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if (!entry::processEvents(m_width, m_height, m_debug, m_reset, &m_mouseState) )
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{
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imguiBeginFrame(m_mouseState.m_mx
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, m_mouseState.m_my
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, (m_mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
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| (m_mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
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| (m_mouseState.m_buttons[entry::MouseButton::Middle] ? IMGUI_MBUT_MIDDLE : 0)
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, m_mouseState.m_mz
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, uint16_t(m_width)
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, uint16_t(m_height)
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);
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showExampleDialog(this);
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ImGui::SetNextWindowPos(ImVec2(360.0f, 40.0f), ImGuiCond_FirstUseEver);
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ImGui::Begin("Formats", NULL, ImGuiWindowFlags_AlwaysAutoResize);
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float cellWidth = m_previewSize;
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for (int32_t i = 0; i < kNumFormats; ++i)
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{
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int32_t format = (int32_t)bgfx::TextureFormat::Unknown + 1 + i;
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ImVec2 textSize = ImGui::CalcTextSize(bimg::getName(bimg::TextureFormat::Enum(format) ) );
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cellWidth = bx::max(cellWidth, textSize.x);
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}
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ImDrawList* drawList = ImGui::GetWindowDrawList();
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ImGui::DragFloat("Preview Size", &m_previewSize, 1.0f, 10.0f, kTextureSize);
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ImGui::SameLine();
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ImGui::Checkbox("Alpha", &m_useAlpha);
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ImGui::BeginTable("Formats", kNumFormatsInRow, ImGuiTableFlags_Borders | ImGuiTableFlags_SizingFixedFit);
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for (int32_t i = 0; i < kNumFormats; ++i)
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{
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ImGui::TableNextColumn();
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int32_t format = (int32_t)bgfx::TextureFormat::Unknown + 1 + i;
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bool isSelected = (m_selectedFormat == format);
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ImDrawListSplitter splitter;
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splitter.Split(drawList, 2);
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splitter.SetCurrentChannel(drawList, 1);
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ImGui::BeginGroup();
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ImGuiTextBuffer label;
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label.append(bimg::getName(bimg::TextureFormat::Enum(format) ) );
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imguiTextBoxUnformatted(ImVec2(cellWidth, 0.0f), label.c_str() );
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imguiTexturePreview(ImVec2(cellWidth, m_previewSize), m_textures[i], ImVec2(m_previewSize, m_previewSize) );
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ImGui::EndGroup();
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splitter.SetCurrentChannel(drawList, 0);
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ImGui::SetCursorScreenPos(ImGui::GetItemRectMin() );
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ImGui::PushID(i);
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if (ImGui::Selectable(
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"##selectable"
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, &isSelected
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, ImGuiSelectableFlags_AllowItemOverlap
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, ImGui::GetItemRectSize()
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) )
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{
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m_selectedFormat = bimg::TextureFormat::Enum(format);
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}
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ImGui::PopID();
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splitter.Merge(drawList);
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}
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ImGui::EndTable();
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ImGui::End();
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{
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ImGui::SetNextWindowPos(ImVec2(40.0f, 300.0f), ImGuiCond_FirstUseEver);
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ImGui::Begin("Selected Format", NULL, ImGuiWindowFlags_AlwaysAutoResize);
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ImGui::Text("Format: %s", bimg::getName(m_selectedFormat) );
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const bgfx::Caps* caps = bgfx::getCaps();
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if (caps->formats[m_selectedFormat] == BGFX_CAPS_FORMAT_TEXTURE_NONE)
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{
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ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(0.0f, 10.0f));
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ImGui::Text("Not supported!");
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ImGui::PopStyleVar();
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}
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else
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{
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const uint32_t formatFlags = caps->formats[m_selectedFormat];
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bool emulated = 0 != (formatFlags & (0
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| BGFX_CAPS_FORMAT_TEXTURE_2D_EMULATED
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| BGFX_CAPS_FORMAT_TEXTURE_3D_EMULATED
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| BGFX_CAPS_FORMAT_TEXTURE_CUBE_EMULATED
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) );
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ImGui::PushEnabled(false);
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ImGui::Checkbox("Emu", &emulated);
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ImGui::PopEnabled();
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if (ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenDisabled))
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{
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ImGui::SetTooltip("Texture format is emulated.");
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}
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ImGui::SameLine();
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bool framebuffer = 0 != (formatFlags & BGFX_CAPS_FORMAT_TEXTURE_FRAMEBUFFER);
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ImGui::PushEnabled(false);
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ImGui::Checkbox("FB", &framebuffer);
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ImGui::PopEnabled();
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if (ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenDisabled))
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{
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ImGui::SetTooltip("Texture format can be used as frame buffer.");
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}
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ImGui::SameLine();
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bool msaa = 0 != (formatFlags & BGFX_CAPS_FORMAT_TEXTURE_MSAA);
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ImGui::PushEnabled(false);
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ImGui::Checkbox("MSAA", &msaa);
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ImGui::PopEnabled();
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if (ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenDisabled))
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{
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ImGui::SetTooltip("Texture can be sampled as MSAA.");
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}
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}
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int32_t selectedTextureIndex = m_selectedFormat - 1 - (int32_t)bimg::TextureFormat::Unknown;
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bgfx::TextureHandle selectedTexture = BGFX_INVALID_HANDLE;
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if (m_selectedFormat != bimg::TextureFormat::Unknown)
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{
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selectedTexture = m_textures[selectedTextureIndex];
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}
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imguiTexturePreview(ImVec2(kTextureSize, kTextureSize), selectedTexture);
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ImGui::End();
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}
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imguiEndFrame();
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// Set view 0 default viewport.
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bgfx::setViewRect(0, 0, 0, uint16_t(m_width), uint16_t(m_height) );
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// This dummy draw call is here to make sure that view 0 is cleared
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// if no other draw calls are submitted to viewZ 0.
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bgfx::touch(0);
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// Advance to next frame. Rendering thread will be kicked to
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// process submitted rendering primitives.
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bgfx::frame();
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return true;
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}
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return false;
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}
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entry::MouseState m_mouseState;
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uint32_t m_width;
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uint32_t m_height;
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uint32_t m_debug;
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uint32_t m_reset;
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float m_previewSize = 50.0f;
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bool m_useAlpha = true;
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bimg::TextureFormat::Enum m_selectedFormat = bimg::TextureFormat::RGBA8;
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bgfx::TextureHandle m_checkerboard = BGFX_INVALID_HANDLE;
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bgfx::TextureHandle m_textures[kNumFormats];
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};
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} // namespace
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ENTRY_IMPLEMENT_MAIN(
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ExamplePixelFormats
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, "47-pixelformats"
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, "Texture formats."
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, "https://bkaradzic.github.io/bgfx/examples.html#pixelformats"
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);
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