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Heuristics to prevent font displaying issues.

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brunoherbelin
2020-10-10 10:29:11 +02:00
parent 99f5236959
commit af11408ee9
2 changed files with 14 additions and 4 deletions
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12
ImGuiToolkit.cpp
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@@ -17,6 +17,8 @@
#define SECOND 1000000000UL
#define MINUTE 60000000000UL
#include <glad/glad.h>
#include "Resource.h"
#include "FileDialog.h"
#include "ImGuiToolkit.h"
@@ -738,15 +740,19 @@ void ImGuiToolkit::SetFont(ImGuiToolkit::font_style style, const std::string &tt
{
// Font Atlas ImGui Management
ImGuiIO& io = ImGui::GetIO();
GLint max = 0;
glGetInternalformativ(GL_TEXTURE_2D, GL_RGBA8, GL_MAX_WIDTH, 1, &max);
io.Fonts->TexDesiredWidth = max / 2; // optimize use of texture depending on OpenGL drivers
// Setup font config
const ImWchar* glyph_ranges = io.Fonts->GetGlyphRangesDefault();
std::string filename = "fonts/" + ttf_font_name + ".ttf";
std::string fontname = ttf_font_name + ", " + std::to_string(pointsize) + "px";
ImFontConfig font_config;
fontname.copy(font_config.Name, 40);
font_config.FontDataOwnedByAtlas = false; // data will be copied in font atlas
// TODO : calculate oversampling as function of the maximum texture size
font_config.OversampleH = CLAMP( oversample * 2 + 1, 1, 7 );
font_config.OversampleV = CLAMP( oversample, 0, 5 );
font_config.OversampleH = CLAMP( oversample, 1, 5 );
font_config.OversampleV = CLAMP( oversample, 1, 5 );
// read font in Resource manager
size_t data_size = 0;