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Demo: Extracted some code out of ShowStyleEditor() into NodeFont().

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This commit is contained in:
omar 2020-05-05 19:53:54 +02:00
parent 11a3e75f47
commit 419f905f91
1 changed files with 90 additions and 70 deletions
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160
imgui_demo.cpp
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@ -3285,6 +3285,95 @@ void ImGui::ShowFontSelector(const char* label)
"- If you need to add/remove fonts at runtime (e.g. for DPI change), do it before calling NewFrame().");
}
// [Internal] Display details for a single font, called by ShowStyleEditor().
static void NodeFont(ImFont* font)
{
ImGuiIO& io = ImGui::GetIO();
ImGuiStyle& style = ImGui::GetStyle();
bool font_details_opened = ImGui::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);
ImGui::SameLine(); if (ImGui::SmallButton("Set as default")) { io.FontDefault = font; }
if (!font_details_opened)
return;
ImGui::PushFont(font);
ImGui::Text("The quick brown fox jumps over the lazy dog");
ImGui::PopFont();
ImGui::DragFloat("Font scale", &font->Scale, 0.005f, 0.3f, 2.0f, "%.1f"); // Scale only this font
ImGui::SameLine(); HelpMarker(
"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.)");
ImGui::InputFloat("Font offset", &font->DisplayOffset.y, 1, 1, "%.0f");
ImGui::Text("Ascent: %f, Descent: %f, Height: %f", font->Ascent, font->Descent, font->Ascent - font->Descent);
ImGui::Text("Fallback character: '%c' (U+%04X)", font->FallbackChar, font->FallbackChar);
ImGui::Text("Ellipsis character: '%c' (U+%04X)", font->EllipsisChar, font->EllipsisChar);
const int surface_sqrt = (int)sqrtf((float)font->MetricsTotalSurface);
ImGui::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])
ImGui::BulletText("Input %d: \'%s\', Oversample: (%d,%d), PixelSnapH: %d",
config_i, cfg->Name, cfg->OversampleH, cfg->OversampleV, cfg->PixelSnapH);
if (ImGui::TreeNode("Glyphs", "Glyphs (%d)", font->Glyphs.Size))
{
// Display all glyphs of the fonts in separate pages of 256 characters
const ImU32 glyph_col = ImGui::GetColorU32(ImGuiCol_Text);
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 (!ImGui::TreeNode((void*)(intptr_t)base, "U+%04X..U+%04X (%d %s)", base, base + 255, count, count > 1 ? "glyphs" : "glyph"))
continue;
float cell_size = font->FontSize * 1;
float cell_spacing = style.ItemSpacing.y;
ImVec2 base_pos = ImGui::GetCursorScreenPos();
ImDrawList* draw_list = ImGui::GetWindowDrawList();
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
// in order to generate a zero-terminated 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 && ImGui::IsMouseHoveringRect(cell_p1, cell_p2))
{
ImGui::BeginTooltip();
ImGui::Text("Codepoint: U+%04X", base + n);
ImGui::Separator();
ImGui::Text("Visible: %d", glyph->Visible);
ImGui::Text("AdvanceX: %.1f", glyph->AdvanceX);
ImGui::Text("Pos: (%.2f,%.2f)->(%.2f,%.2f)", glyph->X0, glyph->Y0, glyph->X1, glyph->Y1);
ImGui::Text("UV: (%.3f,%.3f)->(%.3f,%.3f)", glyph->U0, glyph->V0, glyph->U1, glyph->V1);
ImGui::EndTooltip();
}
}
ImGui::Dummy(ImVec2((cell_size + cell_spacing) * 16, (cell_size + cell_spacing) * 16));
ImGui::TreePop();
}
ImGui::TreePop();
}
ImGui::TreePop();
}
void ImGui::ShowStyleEditor(ImGuiStyle* ref)
{
// You can pass in a reference ImGuiStyle structure to compare to, revert to and save to (else it compares to an internally stored reference)
@ -3433,76 +3522,7 @@ void ImGui::ShowStyleEditor(ImGuiStyle* ref)
{
ImFont* font = atlas->Fonts[i];
ImGui::PushID(font);
bool font_details_opened = ImGui::TreeNode(font, "Font %d: \"%s\"\n%.2f px, %d glyphs, %d file(s)", i, font->ConfigData ? font->ConfigData[0].Name : "", font->FontSize, font->Glyphs.Size, font->ConfigDataCount);
ImGui::SameLine(); if (ImGui::SmallButton("Set as default")) { io.FontDefault = font; }
if (font_details_opened)
{
ImGui::PushFont(font);
ImGui::Text("The quick brown fox jumps over the lazy dog");
ImGui::PopFont();
ImGui::DragFloat("Font scale", &font->Scale, 0.005f, 0.3f, 2.0f, "%.1f"); // Scale only this font
ImGui::SameLine(); HelpMarker("Note than the default embedded font is NOT meant to be scaled.\n\nFont 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 should hopefully be rewritten in the future to make scaling more natural and automatic.)");
ImGui::InputFloat("Font offset", &font->DisplayOffset.y, 1, 1, "%.0f");
ImGui::Text("Ascent: %f, Descent: %f, Height: %f", font->Ascent, font->Descent, font->Ascent - font->Descent);
ImGui::Text("Fallback character: '%c' (U+%04X)", font->FallbackChar, font->FallbackChar);
ImGui::Text("Ellipsis character: '%c' (U+%04X)", font->EllipsisChar, font->EllipsisChar);
const float surface_sqrt = sqrtf((float)font->MetricsTotalSurface);
ImGui::Text("Texture Area: about %d px ~%dx%d px", font->MetricsTotalSurface, (int)surface_sqrt, (int)surface_sqrt);
for (int config_i = 0; config_i < font->ConfigDataCount; config_i++)
if (font->ConfigData)
if (const ImFontConfig* cfg = &font->ConfigData[config_i])
ImGui::BulletText("Input %d: \'%s\', Oversample: (%d,%d), PixelSnapH: %d", config_i, cfg->Name, cfg->OversampleH, cfg->OversampleV, cfg->PixelSnapH);
if (ImGui::TreeNode("Glyphs", "Glyphs (%d)", font->Glyphs.Size))
{
// Display all glyphs of the fonts in separate pages of 256 characters
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++)
count += font->FindGlyphNoFallback((ImWchar)(base + n)) ? 1 : 0;
if (count > 0 && ImGui::TreeNode((void*)(intptr_t)base, "U+%04X..U+%04X (%d %s)", base, base + 255, count, count > 1 ? "glyphs" : "glyph"))
{
float cell_size = font->FontSize * 1;
float cell_spacing = style.ItemSpacing.y;
ImVec2 base_pos = ImGui::GetCursorScreenPos();
ImDrawList* draw_list = ImGui::GetWindowDrawList();
for (unsigned int n = 0; n < 256; n++)
{
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, ImGui::GetColorU32(ImGuiCol_Text), (ImWchar)(base + n)); // We use ImFont::RenderChar as a shortcut because we don't have UTF-8 conversion functions available to generate a string.
if (glyph && ImGui::IsMouseHoveringRect(cell_p1, cell_p2))
{
ImGui::BeginTooltip();
ImGui::Text("Codepoint: U+%04X", base + n);
ImGui::Separator();
ImGui::Text("Visible: %d", glyph->Visible);
ImGui::Text("AdvanceX: %.1f", glyph->AdvanceX);
ImGui::Text("Pos: (%.2f,%.2f)->(%.2f,%.2f)", glyph->X0, glyph->Y0, glyph->X1, glyph->Y1);
ImGui::Text("UV: (%.3f,%.3f)->(%.3f,%.3f)", glyph->U0, glyph->V0, glyph->U1, glyph->V1);
ImGui::EndTooltip();
}
}
ImGui::Dummy(ImVec2((cell_size + cell_spacing) * 16, (cell_size + cell_spacing) * 16));
ImGui::TreePop();
}
}
ImGui::TreePop();
}
ImGui::TreePop();
}
NodeFont(font);
ImGui::PopID();
}
if (ImGui::TreeNode("Atlas texture", "Atlas texture (%dx%d pixels)", atlas->TexWidth, atlas->TexHeight))