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Metrics, Demo: moved font details display to metrics code. (#4171)

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ocornut
2021-05-25 13:23:00 +02:00
parent e31d13fa76
commit 3a941f95e9
4 changed files with 126 additions and 124 deletions
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116
imgui.cpp
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@ -11280,6 +11280,25 @@ void ImGui::ShowMetricsWindow(bool* p_open)
End();
}
// [DEBUG] List fonts in a font atlas and display its texture
void ImGui::ShowFontAtlas(ImFontAtlas* atlas)
{
for (int i = 0; i < atlas->Fonts.Size; i++)
{
ImFont* font = atlas->Fonts[i];
PushID(font);
DebugNodeFont(font);
PopID();
}
if (TreeNode("Atlas texture", "Atlas texture (%dx%d pixels)", atlas->TexWidth, atlas->TexHeight))
{
ImVec4 tint_col = ImVec4(1.0f, 1.0f, 1.0f, 1.0f);
ImVec4 border_col = ImVec4(1.0f, 1.0f, 1.0f, 0.5f);
Image(atlas->TexID, ImVec2((float)atlas->TexWidth, (float)atlas->TexHeight), ImVec2(0.0f, 0.0f), ImVec2(1.0f, 1.0f), tint_col, border_col);
TreePop();
}
}
// [DEBUG] Display contents of Columns
void ImGui::DebugNodeColumns(ImGuiOldColumns* columns)
{
@ -11414,6 +11433,101 @@ void ImGui::DebugNodeDrawCmdShowMeshAndBoundingBox(ImDrawList* out_draw_list, co
out_draw_list->Flags = backup_flags;
}
// [DEBUG] Display details for a single font, called by ShowStyleEditor().
void ImGui::DebugNodeFont(ImFont* font)
{
bool opened = TreeNode(font, "Font: \"%s\"\n%.2f px, %d glyphs, %d file(s)",
font->ConfigData ? font->ConfigData[0].Name : "", font->FontSize, font->Glyphs.Size, font->ConfigDataCount);
SameLine();
if (SmallButton("Set as default"))
GetIO().FontDefault = font;
if (!opened)
return;
// Display preview text
PushFont(font);
Text("The quick brown fox jumps over the lazy dog");
PopFont();
// Display details
SetNextItemWidth(GetFontSize() * 8);
DragFloat("Font scale", &font->Scale, 0.005f, 0.3f, 2.0f, "%.1f");
SameLine(); MetricsHelpMarker(
"Note than the default embedded font is NOT meant to be scaled.\n\n"
"Font are currently rendered into bitmaps at a given size at the time of building the atlas. "
"You may oversample them to get some flexibility with scaling. "
"You can also render at multiple sizes and select which one to use at runtime.\n\n"
"(Glimmer of hope: the atlas system will be rewritten in the future to make scaling more flexible.)");
Text("Ascent: %f, Descent: %f, Height: %f", font->Ascent, font->Descent, font->Ascent - font->Descent);
Text("Fallback character: '%c' (U+%04X)", font->FallbackChar, font->FallbackChar);
Text("Ellipsis character: '%c' (U+%04X)", font->EllipsisChar, font->EllipsisChar);
const int surface_sqrt = (int)ImSqrt((float)font->MetricsTotalSurface);
Text("Texture Area: about %d px ~%dx%d px", font->MetricsTotalSurface, surface_sqrt, surface_sqrt);
for (int config_i = 0; config_i < font->ConfigDataCount; config_i++)
if (font->ConfigData)
if (const ImFontConfig* cfg = &font->ConfigData[config_i])
BulletText("Input %d: \'%s\', Oversample: (%d,%d), PixelSnapH: %d, Offset: (%.1f,%.1f)",
config_i, cfg->Name, cfg->OversampleH, cfg->OversampleV, cfg->PixelSnapH, cfg->GlyphOffset.x, cfg->GlyphOffset.y);
// Display all glyphs of the fonts in separate pages of 256 characters
if (TreeNode("Glyphs", "Glyphs (%d)", font->Glyphs.Size))
{
ImDrawList* draw_list = GetWindowDrawList();
const ImU32 glyph_col = GetColorU32(ImGuiCol_Text);
const float cell_size = font->FontSize * 1;
const float cell_spacing = GetStyle().ItemSpacing.y;
for (unsigned int base = 0; base <= IM_UNICODE_CODEPOINT_MAX; base += 256)
{
// Skip ahead if a large bunch of glyphs are not present in the font (test in chunks of 4k)
// This is only a small optimization to reduce the number of iterations when IM_UNICODE_MAX_CODEPOINT
// is large // (if ImWchar==ImWchar32 we will do at least about 272 queries here)
if (!(base & 4095) && font->IsGlyphRangeUnused(base, base + 4095))
{
base += 4096 - 256;
continue;
}
int count = 0;
for (unsigned int n = 0; n < 256; n++)
if (font->FindGlyphNoFallback((ImWchar)(base + n)))
count++;
if (count <= 0)
continue;
if (!TreeNode((void*)(intptr_t)base, "U+%04X..U+%04X (%d %s)", base, base + 255, count, count > 1 ? "glyphs" : "glyph"))
continue;
// Draw a 16x16 grid of glyphs
ImVec2 base_pos = GetCursorScreenPos();
for (unsigned int n = 0; n < 256; n++)
{
// We use ImFont::RenderChar as a shortcut because we don't have UTF-8 conversion functions
// available here and thus cannot easily generate a zero-terminated UTF-8 encoded string.
ImVec2 cell_p1(base_pos.x + (n % 16) * (cell_size + cell_spacing), base_pos.y + (n / 16) * (cell_size + cell_spacing));
ImVec2 cell_p2(cell_p1.x + cell_size, cell_p1.y + cell_size);
const ImFontGlyph* glyph = font->FindGlyphNoFallback((ImWchar)(base + n));
draw_list->AddRect(cell_p1, cell_p2, glyph ? IM_COL32(255, 255, 255, 100) : IM_COL32(255, 255, 255, 50));
if (glyph)
font->RenderChar(draw_list, cell_size, cell_p1, glyph_col, (ImWchar)(base + n));
if (glyph && IsMouseHoveringRect(cell_p1, cell_p2))
{
BeginTooltip();
Text("Codepoint: U+%04X", base + n);
Separator();
Text("Visible: %d", glyph->Visible);
Text("AdvanceX: %.1f", glyph->AdvanceX);
Text("Pos: (%.2f,%.2f)->(%.2f,%.2f)", glyph->X0, glyph->Y0, glyph->X1, glyph->Y1);
Text("UV: (%.3f,%.3f)->(%.3f,%.3f)", glyph->U0, glyph->V0, glyph->U1, glyph->V1);
EndTooltip();
}
}
Dummy(ImVec2((cell_size + cell_spacing) * 16, (cell_size + cell_spacing) * 16));
TreePop();
}
TreePop();
}
TreePop();
}
// [DEBUG] Display contents of ImGuiStorage
void ImGui::DebugNodeStorage(ImGuiStorage* storage, const char* label)
{
@ -11564,9 +11678,11 @@ void ImGui::DebugNodeWindowsList(ImVector<ImGuiWindow*>* windows, const char* la
#else
void ImGui::ShowMetricsWindow(bool*) {}
void ImGui::ShowFontAtlas(ImFontAtlas*) {}
void ImGui::DebugNodeColumns(ImGuiOldColumns*) {}
void ImGui::DebugNodeDrawList(ImGuiWindow*, const ImDrawList*, const char*) {}
void ImGui::DebugNodeDrawCmdShowMeshAndBoundingBox(ImDrawList*, const ImDrawList*, const ImDrawCmd*, bool, bool) {}
void ImGui::DebugNodeFont(ImFont*) {}
void ImGui::DebugNodeStorage(ImGuiStorage*, const char*) {}
void ImGui::DebugNodeTabBar(ImGuiTabBar*, const char*) {}
void ImGui::DebugNodeWindow(ImGuiWindow*, const char*) {}