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Updated ImGui renderer.

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This commit is contained in:
Бранимир Караџић
2025-10-21 18:13:37 -07:00
parent 1a87647189
commit 792417b695
2 changed files with 98 additions and 34 deletions
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109
examples/common/imgui/imgui.cpp
View File

@@ -76,6 +76,70 @@ struct OcornutImguiContext
return;
}
if (NULL != _drawData->Textures)
{
for (ImTextureData* texData : *_drawData->Textures)
{
switch (texData->Status)
{
case ImTextureStatus_WantCreate:
{
ImGui::TextureBgfx tex =
{
.handle = bgfx::createTexture2D(
(uint16_t)texData->Width
, (uint16_t)texData->Height
, false
, 1
, bgfx::TextureFormat::BGRA8
, 0
),
.flags = IMGUI_FLAGS_ALPHA_BLEND,
.mip = 0,
.unused = 0,
};
bgfx::setName(tex.handle, "ImGui Font Atlas");
bgfx::updateTexture2D(tex.handle, 0, 0, 0, 0
, bx::narrowCast<uint16_t>(texData->Width)
, bx::narrowCast<uint16_t>(texData->Height)
, bgfx::copy(texData->GetPixels(), texData->GetSizeInBytes() )
);
texData->SetTexID(bx::bitCast<ImTextureID>(tex) );
texData->SetStatus(ImTextureStatus_OK);
}
break;
case ImTextureStatus_WantDestroy:
{
ImGui::TextureBgfx tex = bx::bitCast<ImGui::TextureBgfx>(texData->GetTexID() );
bgfx::destroy(tex.handle);
texData->SetTexID(ImTextureID_Invalid);
texData->SetStatus(ImTextureStatus_Destroyed);
}
break;
case ImTextureStatus_WantUpdates:
{
ImGui::TextureBgfx tex = bx::bitCast<ImGui::TextureBgfx>(texData->GetTexID() );
for (ImTextureRect& rect : texData->Updates)
{
const uint32_t bpp = texData->BytesPerPixel;
const bgfx::Memory* pix = bgfx::alloc(rect.h * rect.w * bpp);
bx::gather(pix->data, texData->GetPixelsAt(rect.x, rect.y), texData->GetPitch(), rect.w * bpp, rect.h);
bgfx::updateTexture2D(tex.handle, 0, 0, rect.x, rect.y, rect.w, rect.h, pix);
}
}
break;
default:
break;
}
}
}
bgfx::setViewName(m_viewId, "ImGui");
bgfx::setViewMode(m_viewId, bgfx::ViewMode::Sequential);
@@ -136,22 +200,24 @@ struct OcornutImguiContext
| BGFX_STATE_MSAA
;
bgfx::TextureHandle th = m_texture;
bgfx::TextureHandle th = BGFX_INVALID_HANDLE;
bgfx::ProgramHandle program = m_program;
if (ImU64(0) != cmd->TextureId)
{
union { ImTextureID ptr; struct { bgfx::TextureHandle handle; uint8_t flags; uint8_t mip; } s; } texture = { cmd->TextureId };
const ImTextureID texId = cmd->GetTexID();
state |= 0 != (IMGUI_FLAGS_ALPHA_BLEND & texture.s.flags)
if (ImTextureID_Invalid != texId)
{
ImGui::TextureBgfx tex = bx::bitCast<ImGui::TextureBgfx>(texId);
state |= 0 != (IMGUI_FLAGS_ALPHA_BLEND & tex.flags)
? BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_SRC_ALPHA, BGFX_STATE_BLEND_INV_SRC_ALPHA)
: BGFX_STATE_NONE
;
th = texture.s.handle;
th = tex.handle;
if (0 != texture.s.mip)
if (0 != tex.mip)
{
const float lodEnabled[4] = { float(texture.s.mip), 1.0f, 0.0f, 0.0f };
const float lodEnabled[4] = { float(tex.mip), 1.0f, 0.0f, 0.0f };
bgfx::setUniform(u_imageLodEnabled, lodEnabled);
program = m_imageProgram;
}
@@ -221,7 +287,10 @@ struct OcornutImguiContext
setupStyle(true);
io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;
io.BackendFlags |= 0
| ImGuiBackendFlags_RendererHasVtxOffset
| ImGuiBackendFlags_RendererHasTextures
;
io.ConfigDebugHighlightIdConflicts = !!BX_CONFIG_DEBUG;
#if USE_ENTRY
@@ -360,16 +429,12 @@ struct OcornutImguiContext
s_tex = bgfx::createUniform("s_tex", bgfx::UniformType::Sampler);
uint8_t* data;
int32_t width;
int32_t height;
{
ImFontConfig config;
config.FontDataOwnedByAtlas = false;
config.MergeMode = false;
// config.MergeGlyphCenterV = true;
const ImWchar* ranges = io.Fonts->GetGlyphRangesCyrillic();
const ImWchar* ranges = io.Fonts->GetGlyphRangesDefault();
m_font[ImGui::Font::Regular] = io.Fonts->AddFontFromMemoryTTF( (void*)s_robotoRegularTtf, sizeof(s_robotoRegularTtf), _fontSize, &config, ranges);
m_font[ImGui::Font::Mono ] = io.Fonts->AddFontFromMemoryTTF( (void*)s_robotoMonoRegularTtf, sizeof(s_robotoMonoRegularTtf), _fontSize-3.0f, &config, ranges);
@@ -389,18 +454,6 @@ struct OcornutImguiContext
}
}
io.Fonts->GetTexDataAsRGBA32(&data, &width, &height);
m_texture = bgfx::createTexture2D(
(uint16_t)width
, (uint16_t)height
, false
, 1
, bgfx::TextureFormat::BGRA8
, 0
, bgfx::copy(data, width*height*4)
);
ImGui::InitDockContext();
}
@@ -410,7 +463,6 @@ struct OcornutImguiContext
ImGui::DestroyContext(m_imgui);
bgfx::destroy(s_tex);
bgfx::destroy(m_texture);
bgfx::destroy(u_imageLodEnabled);
bgfx::destroy(m_imageProgram);
@@ -501,7 +553,6 @@ struct OcornutImguiContext
bgfx::VertexLayout m_layout;
bgfx::ProgramHandle m_program;
bgfx::ProgramHandle m_imageProgram;
bgfx::TextureHandle m_texture;
bgfx::UniformHandle s_tex;
bgfx::UniformHandle u_imageLodEnabled;
ImFont* m_font[ImGui::Font::Count];
@@ -551,7 +602,7 @@ namespace ImGui
{
void PushFont(Font::Enum _font)
{
PushFont(s_ctx.m_font[_font]);
PushFont(s_ctx.m_font[_font], 0.0f);
}
void PushEnabled(bool _enabled)

23
examples/common/imgui/imgui.h
View File

@@ -7,6 +7,7 @@
#define IMGUI_H_HEADER_GUARD
#include <bgfx/bgfx.h>
#include <bx/bx.h>
#include <dear-imgui/imgui.h>
#include <iconfontheaders/icons_kenney.h>
#include <iconfontheaders/icons_font_awesome.h>
@@ -41,14 +42,26 @@ namespace ImGui
#define IMGUI_FLAGS_NONE UINT8_C(0x00)
#define IMGUI_FLAGS_ALPHA_BLEND UINT8_C(0x01)
struct TextureBgfx
{
bgfx::TextureHandle handle;
uint8_t flags;
uint8_t mip;
uint32_t unused;
};
///
inline ImTextureID toId(bgfx::TextureHandle _handle, uint8_t _flags, uint8_t _mip)
{
union { struct { bgfx::TextureHandle handle; uint8_t flags; uint8_t mip; } s; ImTextureID id; } tex;
tex.s.handle = _handle;
tex.s.flags = _flags;
tex.s.mip = _mip;
return tex.id;
TextureBgfx tex
{
.handle = _handle,
.flags = _flags,
.mip = _mip,
.unused = 0,
};
return bx::bitCast<ImTextureID>(tex);
}
// Helper function for passing bgfx::TextureHandle to ImGui::Image.