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Added ImFontAtlas::AddFontFromMemoryCompressedBase85TTF()

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This commit is contained in:
ocornut 2015-08-03 08:10:10 -06:00
parent da3baebd43
commit 3aca446817
2 changed files with 18 additions and 14 deletions
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29
imgui.cpp
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@ -9895,10 +9895,9 @@ ImFont* ImFontAtlas::AddFont(const ImFontConfig* font_cfg)
return Fonts.back(); return Fonts.back();
} }
// Default font ttf is compressed with stb_compress then base85 encoded (see extra_fonts/binary_to_compressed_c.cpp for encoder)
static unsigned int stb_decompress_length(unsigned char *input); static unsigned int stb_decompress_length(unsigned char *input);
static unsigned int stb_decompress(unsigned char *output, unsigned char *i, unsigned int length); static unsigned int stb_decompress(unsigned char *output, unsigned char *i, unsigned int length);
// Default font ttf is compressed with stb_compress then base85 encoded (see extra_fonts/binary_to_compressed_c.cpp for encoder)
static const char* GetDefaultCompressedFontDataTTFBase85(); static const char* GetDefaultCompressedFontDataTTFBase85();
static unsigned int Decode85Byte(char c) { return c >= '\\' ? c-36 : c-35; } static unsigned int Decode85Byte(char c) { return c >= '\\' ? c-36 : c-35; }
static void Decode85(const unsigned char* src, unsigned int* dst) { for (; *src; src += 5) *dst++ = Decode85Byte(src[0]) + 85*(Decode85Byte(src[1]) + 85*(Decode85Byte(src[2]) + 85*(Decode85Byte(src[3]) + 85*Decode85Byte(src[4])))); } static void Decode85(const unsigned char* src, unsigned int* dst) { for (; *src; src += 5) *dst++ = Decode85Byte(src[0]) + 85*(Decode85Byte(src[1]) + 85*(Decode85Byte(src[2]) + 85*(Decode85Byte(src[3]) + 85*Decode85Byte(src[4])))); }
@ -9906,22 +9905,16 @@ static void Decode85(const unsigned char* src, unsigned int* dst) { fo
// Load embedded ProggyClean.ttf at size 13 // Load embedded ProggyClean.ttf at size 13
ImFont* ImFontAtlas::AddFontDefault(const ImFontConfig* font_cfg_template) ImFont* ImFontAtlas::AddFontDefault(const ImFontConfig* font_cfg_template)
{ {
const char* ttf_compressed_base85 = GetDefaultCompressedFontDataTTFBase85(); ImFontConfig font_cfg = font_cfg_template ? *font_cfg_template : ImFontConfig();
int ttf_compressed_size = (((int)strlen(ttf_compressed_base85) + 4) / 5) * 4; if (!font_cfg_template)
void* ttf_compressed = ImGui::MemAlloc(ttf_compressed_size);
Decode85((const unsigned char*)ttf_compressed_base85, (unsigned int*)ttf_compressed);
ImFontConfig font_cfg;
if (font_cfg_template)
font_cfg = *font_cfg_template;
else
{ {
font_cfg.OversampleH = font_cfg.OversampleV = 1; font_cfg.OversampleH = font_cfg.OversampleV = 1;
font_cfg.PixelSnapH = true; font_cfg.PixelSnapH = true;
} }
if (font_cfg.Name[0] == '\0') strcpy(font_cfg.Name, "<default>"); if (font_cfg.Name[0] == '\0') strcpy(font_cfg.Name, "<default>");
ImFont* font = AddFontFromMemoryCompressedTTF(ttf_compressed, ttf_compressed_size, 13.0f, &font_cfg, GetGlyphRangesDefault());
ImGui::MemFree(ttf_compressed); const char* ttf_compressed_base85 = GetDefaultCompressedFontDataTTFBase85();
ImFont* font = AddFontFromMemoryCompressedBase85TTF(ttf_compressed_base85, 13.0f, &font_cfg, GetGlyphRangesDefault());
return font; return font;
} }
@ -9969,6 +9962,16 @@ ImFont* ImFontAtlas::AddFontFromMemoryCompressedTTF(const void* compressed_ttf_d
return AddFontFromMemoryTTF(buf_decompressed_data, (int)buf_decompressed_size, size_pixels, font_cfg_template, glyph_ranges); return AddFontFromMemoryTTF(buf_decompressed_data, (int)buf_decompressed_size, size_pixels, font_cfg_template, glyph_ranges);
} }
ImFont* ImFontAtlas::AddFontFromMemoryCompressedBase85TTF(const char* compressed_ttf_data_base85, float size_pixels, const ImFontConfig* font_cfg, const ImWchar* glyph_ranges)
{
int compressed_ttf_size = (((int)strlen(compressed_ttf_data_base85) + 4) / 5) * 4;
void* compressed_ttf = ImGui::MemAlloc(compressed_ttf_size);
Decode85((const unsigned char*)compressed_ttf_data_base85, (unsigned int*)compressed_ttf);
ImFont* font = AddFontFromMemoryCompressedTTF(compressed_ttf, compressed_ttf_size, size_pixels, font_cfg, glyph_ranges);
ImGui::MemFree(compressed_ttf);
return font;
}
bool ImFontAtlas::Build() bool ImFontAtlas::Build()
{ {
IM_ASSERT(ConfigData.Size > 0); IM_ASSERT(ConfigData.Size > 0);

3
imgui.h
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@ -1155,7 +1155,8 @@ struct ImFontAtlas
IMGUI_API ImFont* AddFontDefault(const ImFontConfig* font_cfg = NULL); IMGUI_API ImFont* AddFontDefault(const ImFontConfig* font_cfg = NULL);
IMGUI_API ImFont* AddFontFromFileTTF(const char* filename, float size_pixels, const ImFontConfig* font_cfg = NULL, const ImWchar* glyph_ranges = NULL); IMGUI_API ImFont* AddFontFromFileTTF(const char* filename, float size_pixels, const ImFontConfig* font_cfg = NULL, const ImWchar* glyph_ranges = NULL);
IMGUI_API ImFont* AddFontFromMemoryTTF(void* ttf_data, int ttf_size, float size_pixels, const ImFontConfig* font_cfg = NULL, const ImWchar* glyph_ranges = NULL); // Transfer ownership of 'ttf_data' to ImFontAtlas, will be deleted after Build() IMGUI_API ImFont* AddFontFromMemoryTTF(void* ttf_data, int ttf_size, float size_pixels, const ImFontConfig* font_cfg = NULL, const ImWchar* glyph_ranges = NULL); // Transfer ownership of 'ttf_data' to ImFontAtlas, will be deleted after Build()
IMGUI_API ImFont* AddFontFromMemoryCompressedTTF(const void* compressed_ttf_data, int compressed_ttf_size, float size_pixels, const ImFontConfig* font_cfg = NULL, const ImWchar* glyph_ranges = NULL); // 'compressed_ttf_data' untouched and still owned by caller. Compress with binary_to_compressed_c.cpp IMGUI_API ImFont* AddFontFromMemoryCompressedTTF(const void* compressed_ttf_data, int compressed_ttf_size, float size_pixels, const ImFontConfig* font_cfg = NULL, const ImWchar* glyph_ranges = NULL); // 'compressed_ttf_data' still owned by caller. Compress with binary_to_compressed_c.cpp
IMGUI_API ImFont* AddFontFromMemoryCompressedBase85TTF(const char* compressed_ttf_data_base85, float size_pixels, const ImFontConfig* font_cfg = NULL, const ImWchar* glyph_ranges = NULL); // 'compressed_ttf_data_base85' still owned by caller. Compress with binary_to_compressed_c.cpp with -base85 paramaeter
IMGUI_API void ClearTexData(); // Clear the CPU-side texture data. Saves RAM once the texture has been copied to graphics memory. IMGUI_API void ClearTexData(); // Clear the CPU-side texture data. Saves RAM once the texture has been copied to graphics memory.
IMGUI_API void ClearInputData(); // Clear the input TTF data (inc sizes, glyph ranges) IMGUI_API void ClearInputData(); // Clear the input TTF data (inc sizes, glyph ranges)
IMGUI_API void ClearFonts(); // Clear the ImGui-side font data (glyphs storage, UV coordinates) IMGUI_API void ClearFonts(); // Clear the ImGui-side font data (glyphs storage, UV coordinates)