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// machine generated, do not edit
package sokol_debugtext
/*
sokol_debugtext.h - simple ASCII debug text rendering on top of sokol_gfx.h
Project URL: https://github.com/floooh/sokol
Do this:
#define SOKOL_IMPL or
#define SOKOL_DEBUGTEXT_IMPL
before you include this file in *one* C or C++ file to create the
implementation.
The following defines are used by the implementation to select the
platform-specific embedded shader code (these are the same defines as
used by sokol_gfx.h and sokol_app.h):
SOKOL_GLCORE
SOKOL_GLES3
SOKOL_D3D11
SOKOL_METAL
SOKOL_WGPU
...optionally provide the following macros to override defaults:
SOKOL_VSNPRINTF - the function name of an alternative vsnprintf() function (default: vsnprintf)
SOKOL_ASSERT(c) - your own assert macro (default: assert(c))
SOKOL_DEBUGTEXT_API_DECL - public function declaration prefix (default: extern)
SOKOL_API_DECL - same as SOKOL_DEBUGTEXT_API_DECL
SOKOL_API_IMPL - public function implementation prefix (default: -)
SOKOL_UNREACHABLE() - a guard macro for unreachable code (default: assert(false))
If sokol_debugtext.h is compiled as a DLL, define the following before
including the declaration or implementation:
SOKOL_DLL
On Windows, SOKOL_DLL will define SOKOL_DEBUGTEXT_API_DECL as __declspec(dllexport)
or __declspec(dllimport) as needed.
Include the following headers before including sokol_debugtext.h:
sokol_gfx.h
FEATURES AND CONCEPTS
=====================
- renders 8-bit ASCII text as fixed-size 8x8 pixel characters
- comes with 6 embedded 8-bit home computer fonts (each taking up 2 KBytes)
- easily plug in your own fonts
- create multiple contexts for rendering text in different layers or render passes
STEP BY STEP
============
--- to initialize sokol-debugtext, call sdtx_setup() *after* initializing
sokol-gfx:
sdtx_setup(&(sdtx_desc_t){ ... });
To see any warnings and errors, you should always install a logging callback.
The easiest way is via sokol_log.h:
#include "sokol_log.h"
sdtx_setup(&(sdtx_desc_t){
.logger.func = slog_func,
});
--- configure sokol-debugtext by populating the sdtx_desc_t struct:
.context_pool_size (default: 8)
The max number of text contexts that can be created.
.printf_buf_size (default: 4096)
The size of the internal text formatting buffer used by
sdtx_printf() and sdtx_vprintf().
.fonts (default: none)
An array of sdtx_font_desc_t structs used to configure the
fonts that can be used for rendering. To use all builtin
fonts call sdtx_setup() like this (in C99):
sdtx_setup(&(sdtx_desc_t){
.fonts = {
[0] = sdtx_font_kc853(),
[1] = sdtx_font_kc854(),
[2] = sdtx_font_z1013(),
[3] = sdtx_font_cpc(),
[4] = sdtx_font_c64(),
[5] = sdtx_font_oric()
}
});
For documentation on how to use you own font data, search
below for "USING YOUR OWN FONT DATA".
.context
The setup parameters for the default text context. This will
be active right after sdtx_setup(), or when calling
sdtx_set_context(SDTX_DEFAULT_CONTEXT):
.max_commands (default: 4096)
The max number of render commands that can be recorded
into the internal command buffer. This directly translates
to the number of render layer changes in a single frame.
.char_buf_size (default: 4096)
The number of characters that can be rendered per frame in this
context, defines the size of an internal fixed-size vertex
buffer. Any additional characters will be silently ignored.
.canvas_width (default: 640)
.canvas_height (default: 480)
The 'virtual canvas size' in pixels. This defines how big
characters will be rendered relative to the default framebuffer
dimensions. Each character occupies a grid of 8x8 'virtual canvas
pixels' (so a virtual canvas size of 640x480 means that 80x60 characters
fit on the screen). For rendering in a resizeable window, you
should dynamically update the canvas size in each frame by
calling sdtx_canvas(w, h).
.tab_width (default: 4)
The width of a tab character in number of character cells.
.color_format (default: 0)
.depth_format (default: 0)
.sample_count (default: 0)
The pixel format description for the default context needed
for creating the context's sg_pipeline object. When
rendering to the default framebuffer you can leave those
zero-initialized, in this case the proper values will be
filled in by sokol-gfx. You only need to provide non-default
values here when rendering to render targets with different
pixel format attributes than the default framebuffer.
--- Before starting to render text, optionally call sdtx_canvas() to
dynamically resize the virtual canvas. This is recommended when
rendering to a resizeable window. The virtual canvas size can
also be used to scale text in relation to the display resolution.
Examples when using sokol-app:
- to render characters at 8x8 'physical pixels':
sdtx_canvas(sapp_width(), sapp_height());
- to render characters at 16x16 physical pixels:
sdtx_canvas(sapp_width()/2.0f, sapp_height()/2.0f);
Do *not* use integer math here, since this will not look nice
when the render target size isn't divisible by 2.
--- Optionally define the origin for the character grid with:
sdtx_origin(x, y);
The provided coordinates are in character grid cells, not in
virtual canvas pixels. E.g. to set the origin to 2 character tiles
from the left and top border:
sdtx_origin(2, 2);
You can define fractions, e.g. to start rendering half
a character tile from the top-left corner:
sdtx_origin(0.5f, 0.5f);
--- Optionally set a different font by calling:
sdtx_font(font_index)
sokol-debugtext provides 8 font slots which can be populated
with the builtin fonts or with user-provided font data, so
'font_index' must be a number from 0 to 7.
--- Position the text cursor with one of the following calls. All arguments
are in character grid cells as floats and relative to the
origin defined with sdtx_origin():
sdtx_pos(x, y) - sets absolute cursor position
sdtx_pos_x(x) - only set absolute x cursor position
sdtx_pos_y(y) - only set absolute y cursor position
sdtx_move(x, y) - move cursor relative in x and y direction
sdtx_move_x(x) - move cursor relative only in x direction
sdtx_move_y(y) - move cursor relative only in y direction
sdtx_crlf() - set cursor to beginning of next line
(same as sdtx_pos_x(0) + sdtx_move_y(1))
sdtx_home() - resets the cursor to the origin
(same as sdtx_pos(0, 0))
--- Set a new text color with any of the following functions:
sdtx_color3b(r, g, b) - RGB 0..255, A=255
sdtx_color3f(r, g, b) - RGB 0.0f..1.0f, A=1.0f
sdtx_color4b(r, g, b, a) - RGBA 0..255
sdtx_color4f(r, g, b, a) - RGBA 0.0f..1.0f
sdtx_color1i(uint32_t rgba) - ABGR (0xAABBGGRR)
--- Output 8-bit ASCII text with the following functions:
sdtx_putc(c) - output a single character
sdtx_puts(str) - output a null-terminated C string, note that
this will *not* append a newline (so it behaves
differently than the CRT's puts() function)
sdtx_putr(str, len) - 'put range' output the first 'len' characters of
a C string or until the zero character is encountered
sdtx_printf(fmt, ...) - output with printf-formatting, note that you
can inject your own printf-compatible function
by overriding the SOKOL_VSNPRINTF define before
including the implementation
sdtx_vprintf(fmt, args) - same as sdtx_printf() but with the arguments
provided in a va_list
- Note that the text will not yet be rendered, only recorded for rendering
at a later time, the actual rendering happens when sdtx_draw() is called
inside a sokol-gfx render pass.
- This means also you can output text anywhere in the frame, it doesn't
have to be inside a render pass.
- Note that character codes <32 are reserved as control characters
and won't render anything. Currently only the following control
characters are implemented:
\r - carriage return (same as sdtx_pos_x(0))
\n - carriage return + line feed (same as stdx_crlf())
\t - a tab character
--- You can 'record' text into render layers, this allows to mix/interleave
sokol-debugtext rendering with other rendering operations inside
sokol-gfx render passes. To start recording text into a different render
layer, call:
sdtx_layer(int layer_id)
...outside a sokol-gfx render pass.
--- finally, from within a sokol-gfx render pass, call:
sdtx_draw()
...for non-layered rendering, or to draw a specific layer:
sdtx_draw_layer(int layer_id)
NOTE that sdtx_draw() is equivalent to:
sdtx_draw_layer(0)
...so sdtx_draw() will *NOT* render all text layers, instead it will
only render the 'default layer' 0.
--- at the end of a frame (defined by the call to sg_commit()), sokol-debugtext
will rewind all contexts:
- the internal vertex index is set to 0
- the internal command index is set to 0
- the current layer id is set to 0
- the current font is set to 0
- the cursor position is reset
RENDERING WITH MULTIPLE CONTEXTS
================================
Use multiple text contexts if you need to render debug text in different
sokol-gfx render passes, or want to render text to different layers
in the same render pass, each with its own set of parameters.
To create a new text context call:
sdtx_context ctx = sdtx_make_context(&(sdtx_context_desc_t){ ... });
The creation parameters in the sdtx_context_desc_t struct are the same
as already described above in the sdtx_setup() function:
.char_buf_size -- max number of characters rendered in one frame, default: 4096
.canvas_width -- the initial virtual canvas width, default: 640
.canvas_height -- the initial virtual canvas height, default: 400
.tab_width -- tab width in number of characters, default: 4
.color_format -- color pixel format of target render pass
.depth_format -- depth pixel format of target render pass
.sample_count -- MSAA sample count of target render pass
To make a new context the active context, call:
sdtx_set_context(ctx)
...and after that call the text output functions as described above, and
finally, inside a sokol-gfx render pass, call sdtx_draw() to actually
render the text for this context.
A context keeps track of the following parameters:
- the active font
- the virtual canvas size
- the origin position
- the current cursor position
- the current tab width
- the current color
- and the current layer-id
You can get the currently active context with:
sdtx_get_context()
To make the default context current, call sdtx_set_context() with the
special SDTX_DEFAULT_CONTEXT handle:
sdtx_set_context(SDTX_DEFAULT_CONTEXT)
Alternatively, use the function sdtx_default_context() to get the default
context handle:
sdtx_set_context(sdtx_default_context());
To destroy a context, call:
sdtx_destroy_context(ctx)
If a context is set as active that no longer exists, all sokol-debugtext
functions that require an active context will silently fail.
You can directly draw the recorded text in a specific context without
setting the active context:
sdtx_context_draw(ctx)
sdtx_context_draw_layer(ctx, layer_id)
USING YOUR OWN FONT DATA
========================
Instead of the built-in fonts you can also plug your own font data
into sokol-debugtext by providing one or several sdtx_font_desc_t
structures in the sdtx_setup call.
For instance to use a built-in font at slot 0, and a user-font at
font slot 1, the sdtx_setup() call might look like this:
sdtx_setup(&sdtx_desc_t){
.fonts = {
[0] = sdtx_font_kc853(),
[1] = {
.data = {
.ptr = my_font_data,
.size = sizeof(my_font_data)
},
.first_char = ...,
.last_char = ...
}
}
});
Where 'my_font_data' is a byte array where every character is described
by 8 bytes arranged like this:
bits
7 6 5 4 3 2 1 0
. . . X X . . . byte 0: 0x18
. . X X X X . . byte 1: 0x3C
. X X . . X X . byte 2: 0x66
. X X . . X X . byte 3: 0x66
. X X X X X X . byte 4: 0x7E
. X X . . X X . byte 5: 0x66
. X X . . X X . byte 6: 0x66
. . . . . . . . byte 7: 0x00
A complete font consists of 256 characters, resulting in 2048 bytes for
the font data array (but note that the character codes 0..31 will never
be rendered).
If you provide such a complete font data array, you can drop the .first_char
and .last_char initialization parameters since those default to 0 and 255,
note that you can also use the SDTX_RANGE() helper macro to build the
.data item:
sdtx_setup(&sdtx_desc_t){
.fonts = {
[0] = sdtx_font_kc853(),
[1] = {
.data = SDTX_RANGE(my_font_data)
}
}
});
If the font doesn't define all 256 character tiles, or you don't need an
entire 256-character font and want to save a couple of bytes, use the
.first_char and .last_char initialization parameters to define a sub-range.
For instance if the font only contains the characters between the Space
(ASCII code 32) and uppercase character 'Z' (ASCII code 90):
sdtx_setup(&sdtx_desc_t){
.fonts = {
[0] = sdtx_font_kc853(),
[1] = {
.data = SDTX_RANGE(my_font_data),
.first_char = 32, // could also write ' '
.last_char = 90 // could also write 'Z'
}
}
});
Character tiles that haven't been defined in the font will be rendered
as a solid 8x8 quad.
MEMORY ALLOCATION OVERRIDE
==========================
You can override the memory allocation functions at initialization time
like this:
void* my_alloc(size_t size, void* user_data) {
return malloc(size);
}
void my_free(void* ptr, void* user_data) {
free(ptr);
}
...
sdtx_setup(&(sdtx_desc_t){
// ...
.allocator = {
.alloc_fn = my_alloc,
.free_fn = my_free,
.user_data = ...;
}
});
...
If no overrides are provided, malloc and free will be used.
ERROR REPORTING AND LOGGING
===========================
To get any logging information at all you need to provide a logging callback in the setup call,
the easiest way is to use sokol_log.h:
#include "sokol_log.h"
sdtx_setup(&(sdtx_desc_t){
// ...
.logger.func = slog_func
});
To override logging with your own callback, first write a logging function like this:
void my_log(const char* tag, // e.g. 'sdtx'
uint32_t log_level, // 0=panic, 1=error, 2=warn, 3=info
uint32_t log_item_id, // SDTX_LOGITEM_*
const char* message_or_null, // a message string, may be nullptr in release mode
uint32_t line_nr, // line number in sokol_debugtext.h
const char* filename_or_null, // source filename, may be nullptr in release mode
void* user_data)
{
...
}
...and then setup sokol-debugtext like this:
sdtx_setup(&(sdtx_desc_t){
.logger = {
.func = my_log,
.user_data = my_user_data,
}
});
The provided logging function must be reentrant (e.g. be callable from
different threads).
If you don't want to provide your own custom logger it is highly recommended to use
the standard logger in sokol_log.h instead, otherwise you won't see any warnings or
errors.
LICENSE
=======
zlib/libpng license
Copyright (c) 2020 Andre Weissflog
This software is provided 'as-is', without any express or implied warranty.
In no event will the authors be held liable for any damages arising from the
use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software in a
product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not
be misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
*/
import sg "../gfx"
import "core:fmt"
import "core:strings"
printf :: proc(s: string, args: ..any) {
fstr := fmt.tprintf(s, ..args)
putr(strings.unsafe_string_to_cstring(fstr), len(fstr))
}
import "core:c"
_ :: c
SOKOL_DEBUG :: #config(SOKOL_DEBUG, ODIN_DEBUG)
DEBUG :: #config(SOKOL_DEBUGTEXT_DEBUG, SOKOL_DEBUG)
USE_GL :: #config(SOKOL_USE_GL, false)
USE_DLL :: #config(SOKOL_DLL, false)
when ODIN_OS == .Windows {
when USE_DLL {
when USE_GL {
when DEBUG { foreign import sokol_debugtext_clib { "../sokol_dll_windows_x64_gl_debug.lib" } }
else { foreign import sokol_debugtext_clib { "../sokol_dll_windows_x64_gl_release.lib" } }
} else {
when DEBUG { foreign import sokol_debugtext_clib { "../sokol_dll_windows_x64_d3d11_debug.lib" } }
else { foreign import sokol_debugtext_clib { "../sokol_dll_windows_x64_d3d11_release.lib" } }
}
} else {
when USE_GL {
when DEBUG { foreign import sokol_debugtext_clib { "sokol_debugtext_windows_x64_gl_debug.lib" } }
else { foreign import sokol_debugtext_clib { "sokol_debugtext_windows_x64_gl_release.lib" } }
} else {
when DEBUG { foreign import sokol_debugtext_clib { "sokol_debugtext_windows_x64_d3d11_debug.lib" } }
else { foreign import sokol_debugtext_clib { "sokol_debugtext_windows_x64_d3d11_release.lib" } }
}
}
} else when ODIN_OS == .Darwin {
when USE_DLL {
when USE_GL && ODIN_ARCH == .arm64 && DEBUG { foreign import sokol_debugtext_clib { "../dylib/sokol_dylib_macos_arm64_gl_debug.dylib" } }
else when USE_GL && ODIN_ARCH == .arm64 && !DEBUG { foreign import sokol_debugtext_clib { "../dylib/sokol_dylib_macos_arm64_gl_release.dylib" } }
else when USE_GL && ODIN_ARCH == .amd64 && DEBUG { foreign import sokol_debugtext_clib { "../dylib/sokol_dylib_macos_x64_gl_debug.dylib" } }
else when USE_GL && ODIN_ARCH == .amd64 && !DEBUG { foreign import sokol_debugtext_clib { "../dylib/sokol_dylib_macos_x64_gl_release.dylib" } }
else when !USE_GL && ODIN_ARCH == .arm64 && DEBUG { foreign import sokol_debugtext_clib { "../dylib/sokol_dylib_macos_arm64_metal_debug.dylib" } }
else when !USE_GL && ODIN_ARCH == .arm64 && !DEBUG { foreign import sokol_debugtext_clib { "../dylib/sokol_dylib_macos_arm64_metal_release.dylib" } }
else when !USE_GL && ODIN_ARCH == .amd64 && DEBUG { foreign import sokol_debugtext_clib { "../dylib/sokol_dylib_macos_x64_metal_debug.dylib" } }
else when !USE_GL && ODIN_ARCH == .amd64 && !DEBUG { foreign import sokol_debugtext_clib { "../dylib/sokol_dylib_macos_x64_metal_release.dylib" } }
} else {
when USE_GL {
when ODIN_ARCH == .arm64 {
when DEBUG { foreign import sokol_debugtext_clib { "sokol_debugtext_macos_arm64_gl_debug.a" } }
else { foreign import sokol_debugtext_clib { "sokol_debugtext_macos_arm64_gl_release.a" } }
} else {
when DEBUG { foreign import sokol_debugtext_clib { "sokol_debugtext_macos_x64_gl_debug.a" } }
else { foreign import sokol_debugtext_clib { "sokol_debugtext_macos_x64_gl_release.a" } }
}
} else {
when ODIN_ARCH == .arm64 {
when DEBUG { foreign import sokol_debugtext_clib { "sokol_debugtext_macos_arm64_metal_debug.a" } }
else { foreign import sokol_debugtext_clib { "sokol_debugtext_macos_arm64_metal_release.a" } }
} else {
when DEBUG { foreign import sokol_debugtext_clib { "sokol_debugtext_macos_x64_metal_debug.a" } }
else { foreign import sokol_debugtext_clib { "sokol_debugtext_macos_x64_metal_release.a" } }
}
}
}
} else when ODIN_OS == .Linux {
when USE_DLL {
when DEBUG { foreign import sokol_debugtext_clib { "sokol_debugtext_linux_x64_gl_debug.so" } }
else { foreign import sokol_debugtext_clib { "sokol_debugtext_linux_x64_gl_release.so" } }
} else {
when DEBUG { foreign import sokol_debugtext_clib { "sokol_debugtext_linux_x64_gl_debug.a" } }
else { foreign import sokol_debugtext_clib { "sokol_debugtext_linux_x64_gl_release.a" } }
}
} else when ODIN_ARCH == .wasm32 || ODIN_ARCH == .wasm64p32 {
// Feed sokol_debugtext_wasm_gl_debug.a or sokol_debugtext_wasm_gl_release.a into emscripten compiler.
foreign import sokol_debugtext_clib { "env.o" }
} else {
#panic("This OS is currently not supported")
}
@(default_calling_convention="c", link_prefix="sdtx_")
foreign sokol_debugtext_clib {
// initialization/shutdown
setup :: proc(#by_ptr desc: Desc) ---
shutdown :: proc() ---
// builtin font data (use to populate sdtx_desc.font[])
font_kc853 :: proc() -> Font_Desc ---
font_kc854 :: proc() -> Font_Desc ---
font_z1013 :: proc() -> Font_Desc ---
font_cpc :: proc() -> Font_Desc ---
font_c64 :: proc() -> Font_Desc ---
font_oric :: proc() -> Font_Desc ---
// context functions
make_context :: proc(#by_ptr desc: Context_Desc) -> Context ---
destroy_context :: proc(ctx: Context) ---
set_context :: proc(ctx: Context) ---
get_context :: proc() -> Context ---
default_context :: proc() -> Context ---
// drawing functions (call inside sokol-gfx render pass)
draw :: proc() ---
context_draw :: proc(ctx: Context) ---
draw_layer :: proc(#any_int layer_id: c.int) ---
context_draw_layer :: proc(ctx: Context, #any_int layer_id: c.int) ---
// switch render layer
layer :: proc(#any_int layer_id: c.int) ---
// switch to a different font
font :: proc(#any_int font_index: c.int) ---
// set a new virtual canvas size in screen pixels
canvas :: proc(w: f32, h: f32) ---
// set a new origin in character grid coordinates
origin :: proc(x: f32, y: f32) ---
// cursor movement functions (relative to origin in character grid coordinates)
home :: proc() ---
pos :: proc(x: f32, y: f32) ---
pos_x :: proc(x: f32) ---
pos_y :: proc(y: f32) ---
move :: proc(dx: f32, dy: f32) ---
move_x :: proc(dx: f32) ---
move_y :: proc(dy: f32) ---
crlf :: proc() ---
// set the current text color
color3b :: proc(r: u8, g: u8, b: u8) ---
color3f :: proc(r: f32, g: f32, b: f32) ---
color4b :: proc(r: u8, g: u8, b: u8, a: u8) ---
color4f :: proc(r: f32, g: f32, b: f32, a: f32) ---
color1i :: proc(rgba: u32) ---
// text rendering
putc :: proc(c: u8) ---
puts :: proc(str: cstring) ---
putr :: proc(str: cstring, #any_int len: c.int) ---
}
Log_Item :: enum i32 {
OK,
MALLOC_FAILED,
ADD_COMMIT_LISTENER_FAILED,
COMMAND_BUFFER_FULL,
CONTEXT_POOL_EXHAUSTED,
CANNOT_DESTROY_DEFAULT_CONTEXT,
}
/*
sdtx_logger_t
Used in sdtx_desc_t to provide a custom logging and error reporting
callback to sokol-debugtext.
*/
Logger :: struct {
func : proc "c" (a0: cstring, a1: u32, a2: u32, a3: cstring, a4: u32, a5: cstring, a6: rawptr),
user_data : rawptr,
}
// a rendering context handle
Context :: struct {
id : u32,
}
/*
sdtx_range is a pointer-size-pair struct used to pass memory
blobs into sokol-debugtext. When initialized from a value type
(array or struct), use the SDTX_RANGE() macro to build
an sdtx_range struct.
*/
Range :: struct {
ptr : rawptr,
size : c.size_t,
}
Font_Desc :: struct {
data : Range,
first_char : u8,
last_char : u8,
}
/*
sdtx_context_desc_t
Describes the initialization parameters of a rendering context. Creating
additional rendering contexts is useful if you want to render in
different sokol-gfx rendering passes, or when rendering several layers
of text.
*/
Context_Desc :: struct {
max_commands : c.int,
char_buf_size : c.int,
canvas_width : f32,
canvas_height : f32,
tab_width : c.int,
color_format : sg.Pixel_Format,
depth_format : sg.Pixel_Format,
sample_count : c.int,
}
/*
sdtx_allocator_t
Used in sdtx_desc_t to provide custom memory-alloc and -free functions
to sokol_debugtext.h. If memory management should be overridden, both the
alloc_fn and free_fn function must be provided (e.g. it's not valid to
override one function but not the other).
*/
Allocator :: struct {
alloc_fn : proc "c" (a0: c.size_t, a1: rawptr) -> rawptr,
free_fn : proc "c" (a0: rawptr, a1: rawptr),
user_data : rawptr,
}
/*
sdtx_desc_t
Describes the sokol-debugtext API initialization parameters. Passed
to the sdtx_setup() function.
NOTE: to populate the fonts item array with builtin fonts, use any
of the following functions:
sdtx_font_kc853()
sdtx_font_kc854()
sdtx_font_z1013()
sdtx_font_cpc()
sdtx_font_c64()
sdtx_font_oric()
*/
Desc :: struct {
context_pool_size : c.int,
printf_buf_size : c.int,
fonts : [8]Font_Desc,
ctx : Context_Desc,
allocator : Allocator,
logger : Logger,
}
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