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Merge branch 'master' into 2016-07-navigation
This commit is contained in:
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commit
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12
README.md
12
README.md
@ -33,7 +33,7 @@ Your code passes mouse/keyboard inputs and settings to ImGui (see example applic
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ImGui outputs vertex buffers and simple command-lists that you can render in your application. The number of draw calls and state changes is typically very small. Because it doesn't know or touch graphics state directly, you can call ImGui commands anywhere in your code (e.g. in the middle of a running algorithm, or in the middle of your own rendering process). Refer to the sample applications in the examples/ folder for instructions on how to integrate ImGui with your existing codebase.
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_A common misunderstanding is that some people think immediate mode gui == immediate mode rendering, which usually implies hammering your driver/GPU with a bunch of inefficient draw calls and state changes, as the gui functions as called by the user. Some lazy IMGUI-style librairies may work this way but this is NOT what Dear ImGui does. Dear ImGui outputs vertex buffers and a small list of draw calls batches. It never touches your GPU directly. The draw call batches are rather optimal and you can render them later, in your app or even remotely._
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_A common misunderstanding is to think that immediate mode gui == immediate mode rendering, which usually implies hammering your driver/GPU with a bunch of inefficient draw calls and state changes, as the gui functions as called by the user. This is NOT what Dear ImGui does. Dear ImGui outputs vertex buffers and a small list of draw calls batches. It never touches your GPU directly. The draw call batches are decently optimal and you can render them later, in your app or even remotely._
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ImGui allows you create elaborate tools as well as very short-lived ones. On the extreme side of short-liveness: using the Edit&Continue feature of modern compilers you can add a few widgets to tweaks variables while your application is running, and remove the code a minute later! ImGui is not just for tweaking values. You can use it to trace a running algorithm by just emitting text commands. You can use it along with your own reflection data to browse your dataset live. You can use it to expose the internals of a subsystem in your engine, to create a logger, an inspection tool, a profiler, a debugger, etc.
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@ -46,7 +46,9 @@ You should be able to build the examples from sources (tested on Windows/Mac/Lin
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Bindings
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--------
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_NB: those third-party bindings may be more or less maintained, more or less close to the spirit of original API. People who create language bindings sometimes haven't used the C++ API themselves. ImGui was designed with C++ in mind and some of the subtleties may be lost in translation with other languages. If your language supports it, I would suggest replicating the function overloading and default parameters used in the original, else the API may be harder to use. In doubt, always check the original C++ version first!_
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_NB: those third-party bindings may be more or less maintained, more or less close to the spirit of original API and therefore I cannot give much guarantee about them. People who create language bindings sometimes haven't used the C++ API themselves (for the good reason that they aren't C++ users). ImGui was designed with C++ in mind and some of the subtleties may be lost in translation with other languages. If your language supports it, I would suggest replicating the function overloading and default parameters used in the original, else the API may be harder to use. In doubt, please check the original C++ version first!_
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_Integrating Dear ImGui within your custom engine is a matter of wiring mouse/keyboard inputs and providing a render function that can bind a texture and render simple textured triangles. The examples/ folder is populated with applications doing just that. If you are an experienced programmer it should take you less than an hour to integrate Dear ImGui in your custom engine, but make sure to spend time reading the FAQ, the comments and other documentation!_
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Languages:
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- cimgui: thin c-api wrapper for ImGui https://github.com/Extrawurst/cimgui
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@ -84,12 +86,12 @@ Gallery
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See the [Screenshots Thread](https://github.com/ocornut/imgui/issues/123) for some user creations.
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[](https://cloud.githubusercontent.com/assets/8225057/20628927/33e14cac-b329-11e6-80f6-9524e93b048a.png)
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[](https://raw.githubusercontent.com/wiki/ocornut/imgui/web/v148/profiler.png)
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[](https://raw.githubusercontent.com/wiki/ocornut/imgui/web/v148/profiler.png)
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@ -1365,7 +1365,7 @@ FILE* ImFileOpen(const char* filename, const char* mode)
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// Load file content into memory
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// Memory allocated with ImGui::MemAlloc(), must be freed by user using ImGui::MemFree()
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void* ImLoadFileToMemory(const char* filename, const char* file_open_mode, int* out_file_size, int padding_bytes)
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void* ImFileLoadToMemory(const char* filename, const char* file_open_mode, int* out_file_size, int padding_bytes)
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{
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IM_ASSERT(filename && file_open_mode);
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if (out_file_size)
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@ -3146,7 +3146,7 @@ static void LoadIniSettingsFromDisk(const char* ini_filename)
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return;
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int file_size;
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char* file_data = (char*)ImLoadFileToMemory(ini_filename, "rb", &file_size, 1);
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char* file_data = (char*)ImFileLoadToMemory(ini_filename, "rb", &file_size, 1);
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if (!file_data)
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return;
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@ -9967,8 +9967,8 @@ bool ImGui::ColorButton(const ImVec4& col, bool small_height, bool outline_borde
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RenderNavHighlight(bb, id);
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RenderFrame(bb.Min, bb.Max, GetColorU32(col), outline_border, style.FrameRounding);
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if (IsItemHovered())
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SetTooltip("Color:\n(%.2f,%.2f,%.2f,%.2f)\n#%02X%02X%02X%02X", col.x, col.y, col.z, col.w, IM_F32_TO_INT8_SAT(col.x), IM_F32_TO_INT8_SAT(col.y), IM_F32_TO_INT8_SAT(col.z), IM_F32_TO_INT8_SAT(col.z));
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if (IsItemHovered()) // hovered?
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SetTooltip("Color:\n(%.2f,%.2f,%.2f,%.2f)\n#%02X%02X%02X%02X", col.x, col.y, col.z, col.w, IM_F32_TO_INT8_SAT(col.x), IM_F32_TO_INT8_SAT(col.y), IM_F32_TO_INT8_SAT(col.z), IM_F32_TO_INT8_SAT(col.w));
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return pressed;
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}
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2
imgui.h
2
imgui.h
@ -119,7 +119,7 @@ namespace ImGui
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IMGUI_API void ShowUserGuide(); // help block
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IMGUI_API void ShowStyleEditor(ImGuiStyle* ref = NULL); // style editor block. you can pass in a reference ImGuiStyle structure to compare to, revert to and save to (else it uses the default style)
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IMGUI_API void ShowTestWindow(bool* p_open = NULL); // test window demonstrating ImGui features
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IMGUI_API void ShowMetricsWindow(bool* p_open = NULL); // metrics window for debugging ImGui
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IMGUI_API void ShowMetricsWindow(bool* p_open = NULL); // metrics window for debugging ImGui (browse draw commands, individual vertices, window list, etc.)
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// Window
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IMGUI_API bool Begin(const char* name, bool* p_open = NULL, ImGuiWindowFlags flags = 0); // push window to the stack and start appending to it. see .cpp for details. return false when window is collapsed, so you can early out in your code. 'bool* p_open' creates a widget on the upper-right to close the window (which sets your bool to false).
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@ -1195,7 +1195,7 @@ ImFont* ImFontAtlas::AddFontDefault(const ImFontConfig* font_cfg_template)
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ImFont* ImFontAtlas::AddFontFromFileTTF(const char* filename, float size_pixels, const ImFontConfig* font_cfg_template, const ImWchar* glyph_ranges)
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{
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int data_size = 0;
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void* data = ImLoadFileToMemory(filename, "rb", &data_size, 0);
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void* data = ImFileLoadToMemory(filename, "rb", &data_size, 0);
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if (!data)
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{
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IM_ASSERT(0); // Could not load file.
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@ -90,8 +90,8 @@ IMGUI_API int ImTextCountUtf8BytesFromStr(const ImWchar* in_text, cons
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// Helpers: Misc
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IMGUI_API ImU32 ImHash(const void* data, int data_size, ImU32 seed = 0); // Pass data_size==0 for zero-terminated strings
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IMGUI_API void* ImLoadFileToMemory(const char* filename, const char* file_open_mode, int* out_file_size = NULL, int padding_bytes = 0);
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IMGUI_API FILE* ImOpenFile(const char* filename, const char* file_open_mode);
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IMGUI_API void* ImFileLoadToMemory(const char* filename, const char* file_open_mode, int* out_file_size = NULL, int padding_bytes = 0);
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IMGUI_API FILE* ImFileOpen(const char* filename, const char* file_open_mode);
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IMGUI_API bool ImIsPointInTriangle(const ImVec2& p, const ImVec2& a, const ImVec2& b, const ImVec2& c);
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static inline bool ImCharIsSpace(int c) { return c == ' ' || c == '\t' || c == 0x3000; }
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static inline int ImUpperPowerOfTwo(int v) { v--; v |= v >> 1; v |= v >> 2; v |= v >> 4; v |= v >> 8; v |= v >> 16; v++; return v; }
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753
stb_truetype.h
753
stb_truetype.h
@ -1,4 +1,4 @@
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// stb_truetype.h - v1.12 - public domain
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// stb_truetype.h - v1.14 - public domain
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// authored from 2009-2016 by Sean Barrett / RAD Game Tools
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//
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// This library processes TrueType files:
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@ -20,10 +20,12 @@
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//
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// Mikko Mononen: compound shape support, more cmap formats
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// Tor Andersson: kerning, subpixel rendering
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// Dougall Johnson: OpenType / Type 2 font handling
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//
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// Misc other:
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// Ryan Gordon
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// Simon Glass
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||||
// github:IntellectualKitty
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//
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// Bug/warning reports/fixes:
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// "Zer" on mollyrocket (with fix)
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@ -51,6 +53,7 @@
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//
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// VERSION HISTORY
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//
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// 1.13 (2017-01-02) support OpenType fonts, certain Apple fonts, num-fonts-in-TTC function
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// 1.12 (2016-10-25) suppress warnings about casting away const with -Wcast-qual
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// 1.11 (2016-04-02) fix unused-variable warning
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// 1.10 (2016-04-02) user-defined fabs(); rare memory leak; remove duplicate typedef
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@ -95,7 +98,8 @@
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//
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// "Load" a font file from a memory buffer (you have to keep the buffer loaded)
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// stbtt_InitFont()
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// stbtt_GetFontOffsetForIndex() -- use for TTC font collections
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// stbtt_GetFontOffsetForIndex() -- indexing for TTC font collections
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// stbtt_GetNumberOfFonts() -- number of fonts for TTC font collections
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//
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// Render a unicode codepoint to a bitmap
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// stbtt_GetCodepointBitmap() -- allocates and returns a bitmap
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@ -453,6 +457,14 @@ int main(int arg, char **argv)
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extern "C" {
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#endif
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// private structure
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typedef struct
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{
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unsigned char *data;
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int cursor;
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int size;
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} stbtt__buf;
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//////////////////////////////////////////////////////////////////////////////
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//
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// TEXTURE BAKING API
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@ -522,7 +534,7 @@ typedef struct stbrp_rect stbrp_rect;
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STBTT_DEF int stbtt_PackBegin(stbtt_pack_context *spc, unsigned char *pixels, int width, int height, int stride_in_bytes, int padding, void *alloc_context);
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// Initializes a packing context stored in the passed-in stbtt_pack_context.
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// Future calls using this context will pack characters into the bitmap passed
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// in here: a 1-channel bitmap that is weight x height. stride_in_bytes is
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// in here: a 1-channel bitmap that is width * height. stride_in_bytes is
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// the distance from one row to the next (or 0 to mean they are packed tightly
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// together). "padding" is the amount of padding to leave between each
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// character (normally you want '1' for bitmaps you'll use as textures with
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@ -621,14 +633,19 @@ struct stbtt_pack_context {
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//
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//
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STBTT_DEF int stbtt_GetNumberOfFonts(const unsigned char *data);
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// This function will determine the number of fonts in a font file. TrueType
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// collection (.ttc) files may contain multiple fonts, while TrueType font
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// (.ttf) files only contain one font. The number of fonts can be used for
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// indexing with the previous function where the index is between zero and one
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// less than the total fonts. If an error occurs, -1 is returned.
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STBTT_DEF int stbtt_GetFontOffsetForIndex(const unsigned char *data, int index);
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// Each .ttf/.ttc file may have more than one font. Each font has a sequential
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// index number starting from 0. Call this function to get the font offset for
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// a given index; it returns -1 if the index is out of range. A regular .ttf
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// file will only define one font and it always be at offset 0, so it will
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// return '0' for index 0, and -1 for all other indices. You can just skip
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// this step if you know it's that kind of font.
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// return '0' for index 0, and -1 for all other indices.
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// The following structure is defined publically so you can declare one on
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// the stack or as a global or etc, but you should treat it as opaque.
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@ -643,6 +660,13 @@ struct stbtt_fontinfo
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int loca,head,glyf,hhea,hmtx,kern; // table locations as offset from start of .ttf
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int index_map; // a cmap mapping for our chosen character encoding
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int indexToLocFormat; // format needed to map from glyph index to glyph
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|
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stbtt__buf cff; // cff font data
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stbtt__buf charstrings; // the charstring index
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stbtt__buf gsubrs; // global charstring subroutines index
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stbtt__buf subrs; // private charstring subroutines index
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stbtt__buf fontdicts; // array of font dicts
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stbtt__buf fdselect; // map from glyph to fontdict
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};
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STBTT_DEF int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data, int offset);
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@ -720,7 +744,8 @@ STBTT_DEF int stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, in
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enum {
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STBTT_vmove=1,
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STBTT_vline,
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STBTT_vcurve
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STBTT_vcurve,
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STBTT_vcubic
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};
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#endif
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@ -729,7 +754,7 @@ STBTT_DEF int stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, in
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#define stbtt_vertex_type short // can't use stbtt_int16 because that's not visible in the header file
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typedef struct
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{
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stbtt_vertex_type x,y,cx,cy;
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stbtt_vertex_type x,y,cx,cy,cx1,cy1;
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unsigned char type,padding;
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} stbtt_vertex;
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#endif
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@ -951,6 +976,152 @@ typedef int stbtt__test_oversample_pow2[(STBTT_MAX_OVERSAMPLE & (STBTT_MAX_OVERS
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#define STBTT__NOTUSED(v) (void)sizeof(v)
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#endif
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|
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//////////////////////////////////////////////////////////////////////////
|
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//
|
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// stbtt__buf helpers to parse data from file
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//
|
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|
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static stbtt_uint8 stbtt__buf_get8(stbtt__buf *b)
|
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{
|
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if (b->cursor >= b->size)
|
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return 0;
|
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return b->data[b->cursor++];
|
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}
|
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|
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static stbtt_uint8 stbtt__buf_peek8(stbtt__buf *b)
|
||||
{
|
||||
if (b->cursor >= b->size)
|
||||
return 0;
|
||||
return b->data[b->cursor];
|
||||
}
|
||||
|
||||
static void stbtt__buf_seek(stbtt__buf *b, int o)
|
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{
|
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STBTT_assert(!(o > b->size || o < 0));
|
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b->cursor = (o > b->size || o < 0) ? b->size : o;
|
||||
}
|
||||
|
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static void stbtt__buf_skip(stbtt__buf *b, int o)
|
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{
|
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stbtt__buf_seek(b, b->cursor + o);
|
||||
}
|
||||
|
||||
static stbtt_uint32 stbtt__buf_get(stbtt__buf *b, int n)
|
||||
{
|
||||
stbtt_uint32 v = 0;
|
||||
int i;
|
||||
STBTT_assert(n >= 1 && n <= 4);
|
||||
for (i = 0; i < n; i++)
|
||||
v = (v << 8) | stbtt__buf_get8(b);
|
||||
return v;
|
||||
}
|
||||
|
||||
static stbtt__buf stbtt__new_buf(const void *p, size_t size)
|
||||
{
|
||||
stbtt__buf r;
|
||||
STBTT_assert(size < 0x40000000);
|
||||
r.data = (stbtt_uint8*) p;
|
||||
r.size = (int) size;
|
||||
r.cursor = 0;
|
||||
return r;
|
||||
}
|
||||
|
||||
#define stbtt__buf_get16(b) stbtt__buf_get((b), 2)
|
||||
#define stbtt__buf_get32(b) stbtt__buf_get((b), 4)
|
||||
|
||||
static stbtt__buf stbtt__buf_range(const stbtt__buf *b, int o, int s)
|
||||
{
|
||||
stbtt__buf r = stbtt__new_buf(NULL, 0);
|
||||
if (o < 0 || s < 0 || o > b->size || s > b->size - o) return r;
|
||||
r.data = b->data + o;
|
||||
r.size = s;
|
||||
return r;
|
||||
}
|
||||
|
||||
static stbtt__buf stbtt__cff_get_index(stbtt__buf *b)
|
||||
{
|
||||
int count, start, offsize;
|
||||
start = b->cursor;
|
||||
count = stbtt__buf_get16(b);
|
||||
if (count) {
|
||||
offsize = stbtt__buf_get8(b);
|
||||
STBTT_assert(offsize >= 1 && offsize <= 4);
|
||||
stbtt__buf_skip(b, offsize * count);
|
||||
stbtt__buf_skip(b, stbtt__buf_get(b, offsize) - 1);
|
||||
}
|
||||
return stbtt__buf_range(b, start, b->cursor - start);
|
||||
}
|
||||
|
||||
static stbtt_uint32 stbtt__cff_int(stbtt__buf *b)
|
||||
{
|
||||
int b0 = stbtt__buf_get8(b);
|
||||
if (b0 >= 32 && b0 <= 246) return b0 - 139;
|
||||
else if (b0 >= 247 && b0 <= 250) return (b0 - 247)*256 + stbtt__buf_get8(b) + 108;
|
||||
else if (b0 >= 251 && b0 <= 254) return -(b0 - 251)*256 - stbtt__buf_get8(b) - 108;
|
||||
else if (b0 == 28) return stbtt__buf_get16(b);
|
||||
else if (b0 == 29) return stbtt__buf_get32(b);
|
||||
STBTT_assert(0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void stbtt__cff_skip_operand(stbtt__buf *b) {
|
||||
int v, b0 = stbtt__buf_peek8(b);
|
||||
STBTT_assert(b0 >= 28);
|
||||
if (b0 == 30) {
|
||||
stbtt__buf_skip(b, 1);
|
||||
while (b->cursor < b->size) {
|
||||
v = stbtt__buf_get8(b);
|
||||
if ((v & 0xF) == 0xF || (v >> 4) == 0xF)
|
||||
break;
|
||||
}
|
||||
} else {
|
||||
stbtt__cff_int(b);
|
||||
}
|
||||
}
|
||||
|
||||
static stbtt__buf stbtt__dict_get(stbtt__buf *b, int key)
|
||||
{
|
||||
stbtt__buf_seek(b, 0);
|
||||
while (b->cursor < b->size) {
|
||||
int start = b->cursor, end, op;
|
||||
while (stbtt__buf_peek8(b) >= 28)
|
||||
stbtt__cff_skip_operand(b);
|
||||
end = b->cursor;
|
||||
op = stbtt__buf_get8(b);
|
||||
if (op == 12) op = stbtt__buf_get8(b) | 0x100;
|
||||
if (op == key) return stbtt__buf_range(b, start, end-start);
|
||||
}
|
||||
return stbtt__buf_range(b, 0, 0);
|
||||
}
|
||||
|
||||
static void stbtt__dict_get_ints(stbtt__buf *b, int key, int outcount, stbtt_uint32 *out)
|
||||
{
|
||||
int i;
|
||||
stbtt__buf operands = stbtt__dict_get(b, key);
|
||||
for (i = 0; i < outcount && operands.cursor < operands.size; i++)
|
||||
out[i] = stbtt__cff_int(&operands);
|
||||
}
|
||||
|
||||
static int stbtt__cff_index_count(stbtt__buf *b)
|
||||
{
|
||||
stbtt__buf_seek(b, 0);
|
||||
return stbtt__buf_get16(b);
|
||||
}
|
||||
|
||||
static stbtt__buf stbtt__cff_index_get(stbtt__buf b, int i)
|
||||
{
|
||||
int count, offsize, start, end;
|
||||
stbtt__buf_seek(&b, 0);
|
||||
count = stbtt__buf_get16(&b);
|
||||
offsize = stbtt__buf_get8(&b);
|
||||
STBTT_assert(i >= 0 && i < count);
|
||||
STBTT_assert(offsize >= 1 && offsize <= 4);
|
||||
stbtt__buf_skip(&b, i*offsize);
|
||||
start = stbtt__buf_get(&b, offsize);
|
||||
end = stbtt__buf_get(&b, offsize);
|
||||
return stbtt__buf_range(&b, 2+(count+1)*offsize+start, end - start);
|
||||
}
|
||||
|
||||
//////////////////////////////////////////////////////////////////////////
|
||||
//
|
||||
// accessors to parse data from file
|
||||
@ -978,6 +1149,7 @@ static int stbtt__isfont(stbtt_uint8 *font)
|
||||
if (stbtt_tag(font, "typ1")) return 1; // TrueType with type 1 font -- we don't support this!
|
||||
if (stbtt_tag(font, "OTTO")) return 1; // OpenType with CFF
|
||||
if (stbtt_tag4(font, 0,1,0,0)) return 1; // OpenType 1.0
|
||||
if (stbtt_tag(font, "true")) return 1; // Apple specification for TrueType fonts
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -1014,6 +1186,35 @@ static int stbtt_GetFontOffsetForIndex_internal(unsigned char *font_collection,
|
||||
return -1;
|
||||
}
|
||||
|
||||
static int stbtt_GetNumberOfFonts_internal(unsigned char *font_collection)
|
||||
{
|
||||
// if it's just a font, there's only one valid font
|
||||
if (stbtt__isfont(font_collection))
|
||||
return 1;
|
||||
|
||||
// check if it's a TTC
|
||||
if (stbtt_tag(font_collection, "ttcf")) {
|
||||
// version 1?
|
||||
if (ttULONG(font_collection+4) == 0x00010000 || ttULONG(font_collection+4) == 0x00020000) {
|
||||
return ttLONG(font_collection+8);
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static stbtt__buf stbtt__get_subrs(stbtt__buf cff, stbtt__buf fontdict)
|
||||
{
|
||||
stbtt_uint32 subrsoff = 0, private_loc[2] = { 0, 0 };
|
||||
stbtt__buf pdict;
|
||||
stbtt__dict_get_ints(&fontdict, 18, 2, private_loc);
|
||||
if (!private_loc[1] || !private_loc[0]) return stbtt__new_buf(NULL, 0);
|
||||
pdict = stbtt__buf_range(&cff, private_loc[1], private_loc[0]);
|
||||
stbtt__dict_get_ints(&pdict, 19, 1, &subrsoff);
|
||||
if (!subrsoff) return stbtt__new_buf(NULL, 0);
|
||||
stbtt__buf_seek(&cff, private_loc[1]+subrsoff);
|
||||
return stbtt__cff_get_index(&cff);
|
||||
}
|
||||
|
||||
static int stbtt_InitFont_internal(stbtt_fontinfo *info, unsigned char *data, int fontstart)
|
||||
{
|
||||
stbtt_uint32 cmap, t;
|
||||
@ -1021,6 +1222,7 @@ static int stbtt_InitFont_internal(stbtt_fontinfo *info, unsigned char *data, in
|
||||
|
||||
info->data = data;
|
||||
info->fontstart = fontstart;
|
||||
info->cff = stbtt__new_buf(NULL, 0);
|
||||
|
||||
cmap = stbtt__find_table(data, fontstart, "cmap"); // required
|
||||
info->loca = stbtt__find_table(data, fontstart, "loca"); // required
|
||||
@ -1029,8 +1231,61 @@ static int stbtt_InitFont_internal(stbtt_fontinfo *info, unsigned char *data, in
|
||||
info->hhea = stbtt__find_table(data, fontstart, "hhea"); // required
|
||||
info->hmtx = stbtt__find_table(data, fontstart, "hmtx"); // required
|
||||
info->kern = stbtt__find_table(data, fontstart, "kern"); // not required
|
||||
if (!cmap || !info->loca || !info->head || !info->glyf || !info->hhea || !info->hmtx)
|
||||
|
||||
if (!cmap || !info->head || !info->hhea || !info->hmtx)
|
||||
return 0;
|
||||
if (info->glyf) {
|
||||
// required for truetype
|
||||
if (!info->loca) return 0;
|
||||
} else {
|
||||
// initialization for CFF / Type2 fonts (OTF)
|
||||
stbtt__buf b, topdict, topdictidx;
|
||||
stbtt_uint32 cstype = 2, charstrings = 0, fdarrayoff = 0, fdselectoff = 0;
|
||||
stbtt_uint32 cff;
|
||||
|
||||
cff = stbtt__find_table(data, fontstart, "CFF ");
|
||||
if (!cff) return 0;
|
||||
|
||||
info->fontdicts = stbtt__new_buf(NULL, 0);
|
||||
info->fdselect = stbtt__new_buf(NULL, 0);
|
||||
|
||||
// @TODO this should use size from table (not 512MB)
|
||||
info->cff = stbtt__new_buf(data+cff, 512*1024*1024);
|
||||
b = info->cff;
|
||||
|
||||
// read the header
|
||||
stbtt__buf_skip(&b, 2);
|
||||
stbtt__buf_seek(&b, stbtt__buf_get8(&b)); // hdrsize
|
||||
|
||||
// @TODO the name INDEX could list multiple fonts,
|
||||
// but we just use the first one.
|
||||
stbtt__cff_get_index(&b); // name INDEX
|
||||
topdictidx = stbtt__cff_get_index(&b);
|
||||
topdict = stbtt__cff_index_get(topdictidx, 0);
|
||||
stbtt__cff_get_index(&b); // string INDEX
|
||||
info->gsubrs = stbtt__cff_get_index(&b);
|
||||
|
||||
stbtt__dict_get_ints(&topdict, 17, 1, &charstrings);
|
||||
stbtt__dict_get_ints(&topdict, 0x100 | 6, 1, &cstype);
|
||||
stbtt__dict_get_ints(&topdict, 0x100 | 36, 1, &fdarrayoff);
|
||||
stbtt__dict_get_ints(&topdict, 0x100 | 37, 1, &fdselectoff);
|
||||
info->subrs = stbtt__get_subrs(b, topdict);
|
||||
|
||||
// we only support Type 2 charstrings
|
||||
if (cstype != 2) return 0;
|
||||
if (charstrings == 0) return 0;
|
||||
|
||||
if (fdarrayoff) {
|
||||
// looks like a CID font
|
||||
if (!fdselectoff) return 0;
|
||||
stbtt__buf_seek(&b, fdarrayoff);
|
||||
info->fontdicts = stbtt__cff_get_index(&b);
|
||||
info->fdselect = stbtt__buf_range(&b, fdselectoff, b.size-fdselectoff);
|
||||
}
|
||||
|
||||
stbtt__buf_seek(&b, charstrings);
|
||||
info->charstrings = stbtt__cff_get_index(&b);
|
||||
}
|
||||
|
||||
t = stbtt__find_table(data, fontstart, "maxp");
|
||||
if (t)
|
||||
@ -1181,6 +1436,8 @@ static int stbtt__GetGlyfOffset(const stbtt_fontinfo *info, int glyph_index)
|
||||
{
|
||||
int g1,g2;
|
||||
|
||||
STBTT_assert(!info->cff.size);
|
||||
|
||||
if (glyph_index >= info->numGlyphs) return -1; // glyph index out of range
|
||||
if (info->indexToLocFormat >= 2) return -1; // unknown index->glyph map format
|
||||
|
||||
@ -1195,8 +1452,13 @@ static int stbtt__GetGlyfOffset(const stbtt_fontinfo *info, int glyph_index)
|
||||
return g1==g2 ? -1 : g1; // if length is 0, return -1
|
||||
}
|
||||
|
||||
static int stbtt__GetGlyphInfoT2(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1);
|
||||
|
||||
STBTT_DEF int stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1)
|
||||
{
|
||||
if (info->cff.size) {
|
||||
stbtt__GetGlyphInfoT2(info, glyph_index, x0, y0, x1, y1);
|
||||
} else {
|
||||
int g = stbtt__GetGlyfOffset(info, glyph_index);
|
||||
if (g < 0) return 0;
|
||||
|
||||
@ -1204,6 +1466,7 @@ STBTT_DEF int stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int
|
||||
if (y0) *y0 = ttSHORT(info->data + g + 4);
|
||||
if (x1) *x1 = ttSHORT(info->data + g + 6);
|
||||
if (y1) *y1 = ttSHORT(info->data + g + 8);
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
@ -1215,7 +1478,10 @@ STBTT_DEF int stbtt_GetCodepointBox(const stbtt_fontinfo *info, int codepoint, i
|
||||
STBTT_DEF int stbtt_IsGlyphEmpty(const stbtt_fontinfo *info, int glyph_index)
|
||||
{
|
||||
stbtt_int16 numberOfContours;
|
||||
int g = stbtt__GetGlyfOffset(info, glyph_index);
|
||||
int g;
|
||||
if (info->cff.size)
|
||||
return stbtt__GetGlyphInfoT2(info, glyph_index, NULL, NULL, NULL, NULL) == 0;
|
||||
g = stbtt__GetGlyfOffset(info, glyph_index);
|
||||
if (g < 0) return 1;
|
||||
numberOfContours = ttSHORT(info->data + g);
|
||||
return numberOfContours == 0;
|
||||
@ -1237,7 +1503,7 @@ static int stbtt__close_shape(stbtt_vertex *vertices, int num_vertices, int was_
|
||||
return num_vertices;
|
||||
}
|
||||
|
||||
STBTT_DEF int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **pvertices)
|
||||
static int stbtt__GetGlyphShapeTT(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **pvertices)
|
||||
{
|
||||
stbtt_int16 numberOfContours;
|
||||
stbtt_uint8 *endPtsOfContours;
|
||||
@ -1463,6 +1729,416 @@ STBTT_DEF int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, s
|
||||
return num_vertices;
|
||||
}
|
||||
|
||||
typedef struct
|
||||
{
|
||||
int bounds;
|
||||
int started;
|
||||
float first_x, first_y;
|
||||
float x, y;
|
||||
stbtt_int32 min_x, max_x, min_y, max_y;
|
||||
|
||||
stbtt_vertex *pvertices;
|
||||
int num_vertices;
|
||||
} stbtt__csctx;
|
||||
|
||||
#define STBTT__CSCTX_INIT(bounds) {bounds,0, 0,0, 0,0, 0,0,0,0, NULL, 0}
|
||||
|
||||
static void stbtt__track_vertex(stbtt__csctx *c, stbtt_int32 x, stbtt_int32 y)
|
||||
{
|
||||
if (x > c->max_x || !c->started) c->max_x = x;
|
||||
if (y > c->max_y || !c->started) c->max_y = y;
|
||||
if (x < c->min_x || !c->started) c->min_x = x;
|
||||
if (y < c->min_y || !c->started) c->min_y = y;
|
||||
c->started = 1;
|
||||
}
|
||||
|
||||
static void stbtt__csctx_v(stbtt__csctx *c, stbtt_uint8 type, stbtt_int32 x, stbtt_int32 y, stbtt_int32 cx, stbtt_int32 cy, stbtt_int32 cx1, stbtt_int32 cy1)
|
||||
{
|
||||
if (c->bounds) {
|
||||
stbtt__track_vertex(c, x, y);
|
||||
if (type == STBTT_vcubic) {
|
||||
stbtt__track_vertex(c, cx, cy);
|
||||
stbtt__track_vertex(c, cx1, cy1);
|
||||
}
|
||||
} else {
|
||||
stbtt_setvertex(&c->pvertices[c->num_vertices], type, x, y, cx, cy);
|
||||
c->pvertices[c->num_vertices].cx1 = (stbtt_int16) cx1;
|
||||
c->pvertices[c->num_vertices].cy1 = (stbtt_int16) cy1;
|
||||
}
|
||||
c->num_vertices++;
|
||||
}
|
||||
|
||||
static void stbtt__csctx_close_shape(stbtt__csctx *ctx)
|
||||
{
|
||||
if (ctx->first_x != ctx->x || ctx->first_y != ctx->y)
|
||||
stbtt__csctx_v(ctx, STBTT_vline, (int)ctx->first_x, (int)ctx->first_y, 0, 0, 0, 0);
|
||||
}
|
||||
|
||||
static void stbtt__csctx_rmove_to(stbtt__csctx *ctx, float dx, float dy)
|
||||
{
|
||||
stbtt__csctx_close_shape(ctx);
|
||||
ctx->first_x = ctx->x = ctx->x + dx;
|
||||
ctx->first_y = ctx->y = ctx->y + dy;
|
||||
stbtt__csctx_v(ctx, STBTT_vmove, (int)ctx->x, (int)ctx->y, 0, 0, 0, 0);
|
||||
}
|
||||
|
||||
static void stbtt__csctx_rline_to(stbtt__csctx *ctx, float dx, float dy)
|
||||
{
|
||||
ctx->x += dx;
|
||||
ctx->y += dy;
|
||||
stbtt__csctx_v(ctx, STBTT_vline, (int)ctx->x, (int)ctx->y, 0, 0, 0, 0);
|
||||
}
|
||||
|
||||
static void stbtt__csctx_rccurve_to(stbtt__csctx *ctx, float dx1, float dy1, float dx2, float dy2, float dx3, float dy3)
|
||||
{
|
||||
float cx1 = ctx->x + dx1;
|
||||
float cy1 = ctx->y + dy1;
|
||||
float cx2 = cx1 + dx2;
|
||||
float cy2 = cy1 + dy2;
|
||||
ctx->x = cx2 + dx3;
|
||||
ctx->y = cy2 + dy3;
|
||||
stbtt__csctx_v(ctx, STBTT_vcubic, (int)ctx->x, (int)ctx->y, (int)cx1, (int)cy1, (int)cx2, (int)cy2);
|
||||
}
|
||||
|
||||
static stbtt__buf stbtt__get_subr(stbtt__buf idx, int n)
|
||||
{
|
||||
int count = stbtt__cff_index_count(&idx);
|
||||
int bias = 107;
|
||||
if (count >= 33900)
|
||||
bias = 32768;
|
||||
else if (count >= 1240)
|
||||
bias = 1131;
|
||||
n += bias;
|
||||
if (n < 0 || n >= count)
|
||||
return stbtt__new_buf(NULL, 0);
|
||||
return stbtt__cff_index_get(idx, n);
|
||||
}
|
||||
|
||||
static stbtt__buf stbtt__cid_get_glyph_subrs(const stbtt_fontinfo *info, int glyph_index)
|
||||
{
|
||||
stbtt__buf fdselect = info->fdselect;
|
||||
int nranges, start, end, v, fmt, fdselector = -1, i;
|
||||
|
||||
stbtt__buf_seek(&fdselect, 0);
|
||||
fmt = stbtt__buf_get8(&fdselect);
|
||||
if (fmt == 0) {
|
||||
// untested
|
||||
stbtt__buf_skip(&fdselect, glyph_index);
|
||||
fdselector = stbtt__buf_get8(&fdselect);
|
||||
} else if (fmt == 3) {
|
||||
nranges = stbtt__buf_get16(&fdselect);
|
||||
start = stbtt__buf_get16(&fdselect);
|
||||
for (i = 0; i < nranges; i++) {
|
||||
v = stbtt__buf_get8(&fdselect);
|
||||
end = stbtt__buf_get16(&fdselect);
|
||||
if (glyph_index >= start && glyph_index < end) {
|
||||
fdselector = v;
|
||||
break;
|
||||
}
|
||||
start = end;
|
||||
}
|
||||
}
|
||||
if (fdselector == -1) stbtt__new_buf(NULL, 0);
|
||||
return stbtt__get_subrs(info->cff, stbtt__cff_index_get(info->fontdicts, fdselector));
|
||||
}
|
||||
|
||||
static int stbtt__run_charstring(const stbtt_fontinfo *info, int glyph_index, stbtt__csctx *c)
|
||||
{
|
||||
int in_header = 1, maskbits = 0, subr_stack_height = 0, sp = 0, v, i, b0;
|
||||
int has_subrs = 0, clear_stack;
|
||||
float s[48];
|
||||
stbtt__buf subr_stack[10], subrs = info->subrs, b;
|
||||
float f;
|
||||
|
||||
#define STBTT__CSERR(s) (0)
|
||||
|
||||
// this currently ignores the initial width value, which isn't needed if we have hmtx
|
||||
b = stbtt__cff_index_get(info->charstrings, glyph_index);
|
||||
while (b.cursor < b.size) {
|
||||
i = 0;
|
||||
clear_stack = 1;
|
||||
b0 = stbtt__buf_get8(&b);
|
||||
switch (b0) {
|
||||
// @TODO implement hinting
|
||||
case 0x13: // hintmask
|
||||
case 0x14: // cntrmask
|
||||
if (in_header)
|
||||
maskbits += (sp / 2); // implicit "vstem"
|
||||
in_header = 0;
|
||||
stbtt__buf_skip(&b, (maskbits + 7) / 8);
|
||||
break;
|
||||
|
||||
case 0x01: // hstem
|
||||
case 0x03: // vstem
|
||||
case 0x12: // hstemhm
|
||||
case 0x17: // vstemhm
|
||||
maskbits += (sp / 2);
|
||||
break;
|
||||
|
||||
case 0x15: // rmoveto
|
||||
in_header = 0;
|
||||
if (sp < 2) return STBTT__CSERR("rmoveto stack");
|
||||
stbtt__csctx_rmove_to(c, s[sp-2], s[sp-1]);
|
||||
break;
|
||||
case 0x04: // vmoveto
|
||||
in_header = 0;
|
||||
if (sp < 1) return STBTT__CSERR("vmoveto stack");
|
||||
stbtt__csctx_rmove_to(c, 0, s[sp-1]);
|
||||
break;
|
||||
case 0x16: // hmoveto
|
||||
in_header = 0;
|
||||
if (sp < 1) return STBTT__CSERR("hmoveto stack");
|
||||
stbtt__csctx_rmove_to(c, s[sp-1], 0);
|
||||
break;
|
||||
|
||||
case 0x05: // rlineto
|
||||
if (sp < 2) return STBTT__CSERR("rlineto stack");
|
||||
for (; i + 1 < sp; i += 2)
|
||||
stbtt__csctx_rline_to(c, s[i], s[i+1]);
|
||||
break;
|
||||
|
||||
// hlineto/vlineto and vhcurveto/hvcurveto alternate horizontal and vertical
|
||||
// starting from a different place.
|
||||
|
||||
case 0x07: // vlineto
|
||||
if (sp < 1) return STBTT__CSERR("vlineto stack");
|
||||
goto vlineto;
|
||||
case 0x06: // hlineto
|
||||
if (sp < 1) return STBTT__CSERR("hlineto stack");
|
||||
for (;;) {
|
||||
if (i >= sp) break;
|
||||
stbtt__csctx_rline_to(c, s[i], 0);
|
||||
i++;
|
||||
vlineto:
|
||||
if (i >= sp) break;
|
||||
stbtt__csctx_rline_to(c, 0, s[i]);
|
||||
i++;
|
||||
}
|
||||
break;
|
||||
|
||||
case 0x1F: // hvcurveto
|
||||
if (sp < 4) return STBTT__CSERR("hvcurveto stack");
|
||||
goto hvcurveto;
|
||||
case 0x1E: // vhcurveto
|
||||
if (sp < 4) return STBTT__CSERR("vhcurveto stack");
|
||||
for (;;) {
|
||||
if (i + 3 >= sp) break;
|
||||
stbtt__csctx_rccurve_to(c, 0, s[i], s[i+1], s[i+2], s[i+3], (sp - i == 5) ? s[i + 4] : 0.0f);
|
||||
i += 4;
|
||||
hvcurveto:
|
||||
if (i + 3 >= sp) break;
|
||||
stbtt__csctx_rccurve_to(c, s[i], 0, s[i+1], s[i+2], (sp - i == 5) ? s[i+4] : 0.0f, s[i+3]);
|
||||
i += 4;
|
||||
}
|
||||
break;
|
||||
|
||||
case 0x08: // rrcurveto
|
||||
if (sp < 6) return STBTT__CSERR("rcurveline stack");
|
||||
for (; i + 5 < sp; i += 6)
|
||||
stbtt__csctx_rccurve_to(c, s[i], s[i+1], s[i+2], s[i+3], s[i+4], s[i+5]);
|
||||
break;
|
||||
|
||||
case 0x18: // rcurveline
|
||||
if (sp < 8) return STBTT__CSERR("rcurveline stack");
|
||||
for (; i + 5 < sp - 2; i += 6)
|
||||
stbtt__csctx_rccurve_to(c, s[i], s[i+1], s[i+2], s[i+3], s[i+4], s[i+5]);
|
||||
if (i + 1 >= sp) return STBTT__CSERR("rcurveline stack");
|
||||
stbtt__csctx_rline_to(c, s[i], s[i+1]);
|
||||
break;
|
||||
|
||||
case 0x19: // rlinecurve
|
||||
if (sp < 8) return STBTT__CSERR("rlinecurve stack");
|
||||
for (; i + 1 < sp - 6; i += 2)
|
||||
stbtt__csctx_rline_to(c, s[i], s[i+1]);
|
||||
if (i + 5 >= sp) return STBTT__CSERR("rlinecurve stack");
|
||||
stbtt__csctx_rccurve_to(c, s[i], s[i+1], s[i+2], s[i+3], s[i+4], s[i+5]);
|
||||
break;
|
||||
|
||||
case 0x1A: // vvcurveto
|
||||
case 0x1B: // hhcurveto
|
||||
if (sp < 4) return STBTT__CSERR("(vv|hh)curveto stack");
|
||||
f = 0.0;
|
||||
if (sp & 1) { f = s[i]; i++; }
|
||||
for (; i + 3 < sp; i += 4) {
|
||||
if (b0 == 0x1B)
|
||||
stbtt__csctx_rccurve_to(c, s[i], f, s[i+1], s[i+2], s[i+3], 0.0);
|
||||
else
|
||||
stbtt__csctx_rccurve_to(c, f, s[i], s[i+1], s[i+2], 0.0, s[i+3]);
|
||||
f = 0.0;
|
||||
}
|
||||
break;
|
||||
|
||||
case 0x0A: // callsubr
|
||||
if (!has_subrs) {
|
||||
if (info->fdselect.size)
|
||||
subrs = stbtt__cid_get_glyph_subrs(info, glyph_index);
|
||||
has_subrs = 1;
|
||||
}
|
||||
// fallthrough
|
||||
case 0x1D: // callgsubr
|
||||
if (sp < 1) return STBTT__CSERR("call(g|)subr stack");
|
||||
v = (int) s[--sp];
|
||||
if (subr_stack_height >= 10) return STBTT__CSERR("recursion limit");
|
||||
subr_stack[subr_stack_height++] = b;
|
||||
b = stbtt__get_subr(b0 == 0x0A ? subrs : info->gsubrs, v);
|
||||
if (b.size == 0) return STBTT__CSERR("subr not found");
|
||||
b.cursor = 0;
|
||||
clear_stack = 0;
|
||||
break;
|
||||
|
||||
case 0x0B: // return
|
||||
if (subr_stack_height <= 0) return STBTT__CSERR("return outside subr");
|
||||
b = subr_stack[--subr_stack_height];
|
||||
clear_stack = 0;
|
||||
break;
|
||||
|
||||
case 0x0E: // endchar
|
||||
stbtt__csctx_close_shape(c);
|
||||
return 1;
|
||||
|
||||
case 0x0C: { // two-byte escape
|
||||
float dx1, dx2, dx3, dx4, dx5, dx6, dy1, dy2, dy3, dy4, dy5, dy6;
|
||||
float dx, dy;
|
||||
int b1 = stbtt__buf_get8(&b);
|
||||
switch (b1) {
|
||||
// @TODO These "flex" implementations ignore the flex-depth and resolution,
|
||||
// and always draw beziers.
|
||||
case 0x22: // hflex
|
||||
if (sp < 7) return STBTT__CSERR("hflex stack");
|
||||
dx1 = s[0];
|
||||
dx2 = s[1];
|
||||
dy2 = s[2];
|
||||
dx3 = s[3];
|
||||
dx4 = s[4];
|
||||
dx5 = s[5];
|
||||
dx6 = s[6];
|
||||
stbtt__csctx_rccurve_to(c, dx1, 0, dx2, dy2, dx3, 0);
|
||||
stbtt__csctx_rccurve_to(c, dx4, 0, dx5, -dy2, dx6, 0);
|
||||
break;
|
||||
|
||||
case 0x23: // flex
|
||||
if (sp < 13) return STBTT__CSERR("flex stack");
|
||||
dx1 = s[0];
|
||||
dy1 = s[1];
|
||||
dx2 = s[2];
|
||||
dy2 = s[3];
|
||||
dx3 = s[4];
|
||||
dy3 = s[5];
|
||||
dx4 = s[6];
|
||||
dy4 = s[7];
|
||||
dx5 = s[8];
|
||||
dy5 = s[9];
|
||||
dx6 = s[10];
|
||||
dy6 = s[11];
|
||||
//fd is s[12]
|
||||
stbtt__csctx_rccurve_to(c, dx1, dy1, dx2, dy2, dx3, dy3);
|
||||
stbtt__csctx_rccurve_to(c, dx4, dy4, dx5, dy5, dx6, dy6);
|
||||
break;
|
||||
|
||||
case 0x24: // hflex1
|
||||
if (sp < 9) return STBTT__CSERR("hflex1 stack");
|
||||
dx1 = s[0];
|
||||
dy1 = s[1];
|
||||
dx2 = s[2];
|
||||
dy2 = s[3];
|
||||
dx3 = s[4];
|
||||
dx4 = s[5];
|
||||
dx5 = s[6];
|
||||
dy5 = s[7];
|
||||
dx6 = s[8];
|
||||
stbtt__csctx_rccurve_to(c, dx1, dy1, dx2, dy2, dx3, 0);
|
||||
stbtt__csctx_rccurve_to(c, dx4, 0, dx5, dy5, dx6, -(dy1+dy2+dy5));
|
||||
break;
|
||||
|
||||
case 0x25: // flex1
|
||||
if (sp < 11) return STBTT__CSERR("flex1 stack");
|
||||
dx1 = s[0];
|
||||
dy1 = s[1];
|
||||
dx2 = s[2];
|
||||
dy2 = s[3];
|
||||
dx3 = s[4];
|
||||
dy3 = s[5];
|
||||
dx4 = s[6];
|
||||
dy4 = s[7];
|
||||
dx5 = s[8];
|
||||
dy5 = s[9];
|
||||
dx6 = dy6 = s[10];
|
||||
dx = dx1+dx2+dx3+dx4+dx5;
|
||||
dy = dy1+dy2+dy3+dy4+dy5;
|
||||
if (STBTT_fabs(dx) > STBTT_fabs(dy))
|
||||
dy6 = -dy;
|
||||
else
|
||||
dx6 = -dx;
|
||||
stbtt__csctx_rccurve_to(c, dx1, dy1, dx2, dy2, dx3, dy3);
|
||||
stbtt__csctx_rccurve_to(c, dx4, dy4, dx5, dy5, dx6, dy6);
|
||||
break;
|
||||
|
||||
default:
|
||||
return STBTT__CSERR("unimplemented");
|
||||
}
|
||||
} break;
|
||||
|
||||
default:
|
||||
if (b0 != 255 && b0 != 28 && (b0 < 32 || b0 > 254))
|
||||
return STBTT__CSERR("reserved operator");
|
||||
|
||||
// push immediate
|
||||
if (b0 == 255) {
|
||||
f = (float)stbtt__buf_get32(&b) / 0x10000;
|
||||
} else {
|
||||
stbtt__buf_skip(&b, -1);
|
||||
f = (float)(stbtt_int16)stbtt__cff_int(&b);
|
||||
}
|
||||
if (sp >= 48) return STBTT__CSERR("push stack overflow");
|
||||
s[sp++] = f;
|
||||
clear_stack = 0;
|
||||
break;
|
||||
}
|
||||
if (clear_stack) sp = 0;
|
||||
}
|
||||
return STBTT__CSERR("no endchar");
|
||||
|
||||
#undef STBTT__CSERR
|
||||
}
|
||||
|
||||
static int stbtt__GetGlyphShapeT2(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **pvertices)
|
||||
{
|
||||
// runs the charstring twice, once to count and once to output (to avoid realloc)
|
||||
stbtt__csctx count_ctx = STBTT__CSCTX_INIT(1);
|
||||
stbtt__csctx output_ctx = STBTT__CSCTX_INIT(0);
|
||||
if (stbtt__run_charstring(info, glyph_index, &count_ctx)) {
|
||||
*pvertices = (stbtt_vertex*)STBTT_malloc(count_ctx.num_vertices*sizeof(stbtt_vertex), info->userdata);
|
||||
output_ctx.pvertices = *pvertices;
|
||||
if (stbtt__run_charstring(info, glyph_index, &output_ctx)) {
|
||||
STBTT_assert(output_ctx.num_vertices == count_ctx.num_vertices);
|
||||
return output_ctx.num_vertices;
|
||||
}
|
||||
}
|
||||
*pvertices = NULL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int stbtt__GetGlyphInfoT2(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1)
|
||||
{
|
||||
stbtt__csctx c = STBTT__CSCTX_INIT(1);
|
||||
int r = stbtt__run_charstring(info, glyph_index, &c);
|
||||
if (x0) {
|
||||
*x0 = r ? c.min_x : 0;
|
||||
*y0 = r ? c.min_y : 0;
|
||||
*x1 = r ? c.max_x : 0;
|
||||
*y1 = r ? c.max_y : 0;
|
||||
}
|
||||
return r ? c.num_vertices : 0;
|
||||
}
|
||||
|
||||
STBTT_DEF int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **pvertices)
|
||||
{
|
||||
if (!info->cff.size)
|
||||
return stbtt__GetGlyphShapeTT(info, glyph_index, pvertices);
|
||||
else
|
||||
return stbtt__GetGlyphShapeT2(info, glyph_index, pvertices);
|
||||
}
|
||||
|
||||
STBTT_DEF void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_index, int *advanceWidth, int *leftSideBearing)
|
||||
{
|
||||
stbtt_uint16 numOfLongHorMetrics = ttUSHORT(info->data+info->hhea + 34);
|
||||
@ -2333,6 +3009,48 @@ static int stbtt__tesselate_curve(stbtt__point *points, int *num_points, float x
|
||||
return 1;
|
||||
}
|
||||
|
||||
static void stbtt__tesselate_cubic(stbtt__point *points, int *num_points, float x0, float y0, float x1, float y1, float x2, float y2, float x3, float y3, float objspace_flatness_squared, int n)
|
||||
{
|
||||
// @TODO this "flatness" calculation is just made-up nonsense that seems to work well enough
|
||||
float dx0 = x1-x0;
|
||||
float dy0 = y1-y0;
|
||||
float dx1 = x2-x1;
|
||||
float dy1 = y2-y1;
|
||||
float dx2 = x3-x2;
|
||||
float dy2 = y3-y2;
|
||||
float dx = x3-x0;
|
||||
float dy = y3-y0;
|
||||
float longlen = (float) (STBTT_sqrt(dx0*dx0+dy0*dy0)+STBTT_sqrt(dx1*dx1+dy1*dy1)+STBTT_sqrt(dx2*dx2+dy2*dy2));
|
||||
float shortlen = (float) STBTT_sqrt(dx*dx+dy*dy);
|
||||
float flatness_squared = longlen*longlen-shortlen*shortlen;
|
||||
|
||||
if (n > 16) // 65536 segments on one curve better be enough!
|
||||
return;
|
||||
|
||||
if (flatness_squared > objspace_flatness_squared) {
|
||||
float x01 = (x0+x1)/2;
|
||||
float y01 = (y0+y1)/2;
|
||||
float x12 = (x1+x2)/2;
|
||||
float y12 = (y1+y2)/2;
|
||||
float x23 = (x2+x3)/2;
|
||||
float y23 = (y2+y3)/2;
|
||||
|
||||
float xa = (x01+x12)/2;
|
||||
float ya = (y01+y12)/2;
|
||||
float xb = (x12+x23)/2;
|
||||
float yb = (y12+y23)/2;
|
||||
|
||||
float mx = (xa+xb)/2;
|
||||
float my = (ya+yb)/2;
|
||||
|
||||
stbtt__tesselate_cubic(points, num_points, x0,y0, x01,y01, xa,ya, mx,my, objspace_flatness_squared,n+1);
|
||||
stbtt__tesselate_cubic(points, num_points, mx,my, xb,yb, x23,y23, x3,y3, objspace_flatness_squared,n+1);
|
||||
} else {
|
||||
stbtt__add_point(points, *num_points,x3,y3);
|
||||
*num_points = *num_points+1;
|
||||
}
|
||||
}
|
||||
|
||||
// returns number of contours
|
||||
static stbtt__point *stbtt_FlattenCurves(stbtt_vertex *vertices, int num_verts, float objspace_flatness, int **contour_lengths, int *num_contours, void *userdata)
|
||||
{
|
||||
@ -2389,6 +3107,14 @@ static stbtt__point *stbtt_FlattenCurves(stbtt_vertex *vertices, int num_verts,
|
||||
objspace_flatness_squared, 0);
|
||||
x = vertices[i].x, y = vertices[i].y;
|
||||
break;
|
||||
case STBTT_vcubic:
|
||||
stbtt__tesselate_cubic(points, &num_points, x,y,
|
||||
vertices[i].cx, vertices[i].cy,
|
||||
vertices[i].cx1, vertices[i].cy1,
|
||||
vertices[i].x, vertices[i].y,
|
||||
objspace_flatness_squared, 0);
|
||||
x = vertices[i].x, y = vertices[i].y;
|
||||
break;
|
||||
}
|
||||
}
|
||||
(*contour_lengths)[n] = num_points - start;
|
||||
@ -3214,6 +3940,11 @@ STBTT_DEF int stbtt_GetFontOffsetForIndex(const unsigned char *data, int index)
|
||||
return stbtt_GetFontOffsetForIndex_internal((unsigned char *) data, index);
|
||||
}
|
||||
|
||||
STBTT_DEF int stbtt_GetNumberOfFonts(const unsigned char *data)
|
||||
{
|
||||
return stbtt_GetNumberOfFonts_internal((unsigned char *) data);
|
||||
}
|
||||
|
||||
STBTT_DEF int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data, int offset)
|
||||
{
|
||||
return stbtt_InitFont_internal(info, (unsigned char *) data, offset);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user