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Textures: Added ImTextureData::UsedRect.

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# Conflicts:
#	imgui_internal.h
This commit is contained in:
ocornut
2025-02-19 15:41:26 +01:00
committed by ocornut
parent 2bf6879dae
commit e98a314e06
4 changed files with 15 additions and 5 deletions
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9
imgui.cpp
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@@ -15724,10 +15724,13 @@ void ImGui::DebugNodeTexture(ImTextureData* tex)
ImGuiContext& g = *GImGui;
if (TreeNode(tex, "Texture #%03d (%dx%d pixels)", tex->UniqueID, tex->Width, tex->Height))
{
ImGuiMetricsConfig* cfg = &g.DebugMetricsConfig;
Checkbox("Show used rect", &cfg->ShowTextureUsedRect);
PushStyleVar(ImGuiStyleVar_ImageBorderSize, ImMax(1.0f, g.Style.ImageBorderSize));
ImTextureRef tex_id;
tex_id._TexData = tex; // Don't use tex->TexID directly so first frame works.
ImageWithBg(tex_id, ImVec2((float)tex->Width, (float)tex->Height), ImVec2(0.0f, 0.0f), ImVec2(1.0f, 1.0f), ImVec4(0.0f, 0.0f, 0.0f, 1.0f));
ImVec2 p = GetCursorScreenPos();
ImageWithBg(tex->GetTexRef(), ImVec2((float)tex->Width, (float)tex->Height), ImVec2(0.0f, 0.0f), ImVec2(1.0f, 1.0f), ImVec4(0.0f, 0.0f, 0.0f, 1.0f));
if (cfg->ShowTextureUsedRect)
GetWindowDrawList()->AddRect(ImVec2(p.x + tex->UsedRect.x, p.y + tex->UsedRect.y), ImVec2(p.x + tex->UsedRect.x + tex->UsedRect.w, p.y + tex->UsedRect.y + tex->UsedRect.h), IM_COL32(255, 0, 255, 255));
PopStyleVar();
char texid_desc[20];

3
imgui.h
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@@ -3389,7 +3389,8 @@ struct IMGUI_API ImTextureData
unsigned char* Pixels; // Pointer to buffer holding 'Width*Height' pixels and 'Width*Height*BytesPerPixels' bytes.
ImTextureID TexID; // Always use SetTexID() to modify! Identifier stored in ImDrawCmd::GetTexID() and passed to backend RenderDrawData loop.
void* BackendUserData; // Convenience storage for backend. Some backends may have enough with TexID.
ImTextureRect UpdateRect; // Bounding box encompassing all individual updates.
ImTextureRect UsedRect; // Bounding box encompassing all past and queued Updates[].
ImTextureRect UpdateRect; // Bounding box encompassing all queued Updates[].
ImVector<ImTextureRect> Updates; // Array of individual updates.
int UnusedFrames; // In order to facilitate handling Status==WantDestroy in some backend: this is a count successive frames where the texture was not used. Always >0 when Status==WantDestroy.
unsigned short RefCount; // Number of contexts using this texture.

7
imgui_draw.cpp
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@@ -2439,6 +2439,7 @@ void ImTextureData::Create(ImTextureFormat format, int w, int h)
Pixels = (unsigned char*)IM_ALLOC(Width * Height * BytesPerPixel);
IM_ASSERT(Pixels != NULL);
memset(Pixels, 0, Width * Height * BytesPerPixel);
UsedRect.x = UsedRect.y = UsedRect.w = UsedRect.h = 0;
UpdateRect.x = UpdateRect.y = (unsigned short)~0;
UpdateRect.w = UpdateRect.h = 0;
}
@@ -2918,6 +2919,10 @@ void ImFontAtlasTextureBlockQueueUpload(ImFontAtlas* atlas, ImTextureData* tex,
tex->UpdateRect.y = ImMin(tex->UpdateRect.y, req.y);
tex->UpdateRect.w = (unsigned short)(new_x1 - tex->UpdateRect.x);
tex->UpdateRect.h = (unsigned short)(new_y1 - tex->UpdateRect.y);
tex->UsedRect.x = ImMin(tex->UsedRect.x, req.x);
tex->UsedRect.y = ImMin(tex->UsedRect.y, req.y);
tex->UsedRect.w = (unsigned short)(ImMax(tex->UsedRect.x + tex->UsedRect.w, req.x + req.w) - tex->UsedRect.x);
tex->UsedRect.h = (unsigned short)(ImMax(tex->UsedRect.y + tex->UsedRect.h, req.y + req.h) - tex->UsedRect.y);
atlas->TexIsBuilt = false;
// No need to queue if status is _WantCreate
@@ -3957,7 +3962,7 @@ void ImFontAtlasBuildGrowTexture(ImFontAtlas* atlas, int old_tex_w, int old_tex_
old_tex_h = atlas->TexData->Height;
// FIXME-NEWATLAS-V2: What to do when reaching limits exposed by backend?
// FIXME-NEWATLAS-V2: Does ImFontAtlasFlags_NoPowerOfTwoHeight makes sense now? Allow 'lock' and 'compact' operations? Could we expose e.g. tex->UsedRect.
// FIXME-NEWATLAS-V2: Does ImFontAtlasFlags_NoPowerOfTwoHeight makes sense now? Allow 'lock' and 'compact' operations?
IM_ASSERT(ImIsPowerOfTwo(old_tex_w) && ImIsPowerOfTwo(old_tex_h));
IM_ASSERT(ImIsPowerOfTwo(atlas->TexMinWidth) && ImIsPowerOfTwo(atlas->TexMaxWidth) && ImIsPowerOfTwo(atlas->TexMinHeight) && ImIsPowerOfTwo(atlas->TexMaxHeight));

1
imgui_internal.h
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@@ -2075,6 +2075,7 @@ struct ImGuiMetricsConfig
bool ShowDrawCmdMesh = true;
bool ShowDrawCmdBoundingBoxes = true;
bool ShowTextEncodingViewer = false;
bool ShowTextureUsedRect = false;
int ShowWindowsRectsType = -1;
int ShowTablesRectsType = -1;
int HighlightMonitorIdx = -1;