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commit 5b9a67f154c6251afb1203702830b837297a1030 Author: Cyril Hrubis metan@ucw.cz Date: Sun Dec 1 20:28:53 2013 +0100
doc: Add C core documentation page + cleanup.
Signed-off-by: Cyril Hrubis metan@ucw.cz
diff --git a/doc/Makefile b/doc/Makefile index 197e81d..28cc670 100644 --- a/doc/Makefile +++ b/doc/Makefile @@ -4,7 +4,7 @@ SOURCES=index.html about.txt context.txt loaders.txt filters.txt gen.txt pixels.txt coordinate_system.txt coding_style.txt get_put_pixel.txt blits.txt progress_callback.txt text.txt event_queue.txt compilation.txt filters_resize.txt - filters_dithering.txt filters_python.txt spiv.txt + filters_dithering.txt filters_python.txt spiv.txt core_common.txt SOURCES+=core_python.txt gfx_python.txt loaders_python.txt backends_python.txt
diff --git a/doc/asciidoc.conf b/doc/asciidoc.conf index 240991d..be8e2dd 100644 --- a/doc/asciidoc.conf +++ b/doc/asciidoc.conf @@ -49,6 +49,7 @@ ifdef::toc2[<link rel="stylesheet" href="{stylesdir=.}/toc2.css" type="text/css" </ul> C API Pages <ul> + <li><a href="core.html">Core</a></li> <li><a href="gfx.html">Gfx</a></li> <li><a href="text.html">Text</a></li> <li><a href="filters.html">Filters</a></li> diff --git a/doc/context.txt b/doc/context.txt index ea7d5ba..0d42abd 100644 --- a/doc/context.txt +++ b/doc/context.txt @@ -1,8 +1,8 @@ Drawing Context ---------------
-The 'GP_Context' structure describes an 'in memory' pixmap. It contains all -metadata needed for drawing and filters. +The 'GP_Context' structure describes an 'in memory' pixmap. The structure +contains all metadata needed for drawing, loaders and filters.
Data Structure ~~~~~~~~~~~~~~ @@ -40,14 +40,26 @@ typedef struct GP_Context { The 'pixels' field points to the image data.
The 'pixels' are stored as a one-dimensional array consisting of byte-aligned -lines (i.e. each image line starts at whole byte and ends at whole byte). The -'pixels' array starts exactly at the start of the first line. Each line is -'bytes_per_row' bytes long. The first pixel may actually start at 'offset' bit -in the first byte in each line (but only for some sub contexts for pixel types -that are not byte aligned). The first pixel is followed by the rest of the -pixels in the image line (there is 'w' pixels in each line) and ends somewhere -before the end of the line (i.e. there may be padding before the start of the -next line or in case of subcontexts image data of the parent context). +lines (i.e. each image line starts at whole byte and ends at whole byte). + +The 'pixels' array starts exactly at upper left corner of the image and is +stored in horizontal lines (each line contains 'w' pixels and there is 'h' +lines). Each line is 'bytes_per_row' bytes long (which equals to 'w' * 'bpp' / +8 rouned up to the whole bytes). The first pixel may actually start at +'offset' bit in the first byte in each line (but only for some +<<Sub_Context,subcontexts>> for pixel types that are not byte aligned). + +The link:pixels.html[pixel_type enumeration] defines in which format and how +are pixel data stored in the 'pixels' buffer, i.e. organization and function +of the pixel channels. + +The optional pointer to link:gamma.html[gamma tables] describes per-channel +gamma correction. Unfortunatelly very few parts of the library use it at the +moment (this will be fixed in subsequent releases). + +The bitfield at the the end of the structure describes image orientation (see +bellow) and a flag that tell if 'pixels' data should be freed, which is +usefull for example for <<Sub_Context, subcontexts>>.
Rotation ^^^^^^^^ @@ -213,6 +225,7 @@ If 'free_pixels' flag is set, the pixels buffer is freed too.
If gamma pointer is not 'NULL' the 'GP_GammaRelease()' is called.
+[[Sub_Context]] Subcontext ~~~~~~~~~~
diff --git a/doc/core.txt b/doc/core.txt index c7148fa..1ae253a 100644 --- a/doc/core.txt +++ b/doc/core.txt @@ -1,146 +1,49 @@ -Common code in Core -------------------- +Library Core +------------
-NOTE: Some of the interfaces described here (most notably the allocator) are - semi-internal interfaces and as such API is not considered stable. +Library core contains all basic data structures and functions that forms the +glue which holds the GFXprim libraries together.
-Common Macros and Inline Functions -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The most important data structure is a link:context.html[Context] which +describes in-memory pixmap which is used extensively in all parts of the +library.
-[source,c] -------------------------------------------------------------------------------- -#include <core/GP_Common.h> -/* or */ -#include <GP.h> +Core also contains link:gen.html[generated] code for basic pixel manipulations +such as link:get_put_pixel.html[GetPixel and PutPixel] as well as +link:blits.html[Blits] implementation.
-GP_MIN(a, b); +Library Core is a place to implement common functinonality that is used from +the rest of the GFXprim modules, for example the link:debug.html[Debug layer] +or link:progress_callback.html[Progress callback].
-GP_MAX(a, b); +.Main Core library parts +[grid="rows"] +[options="autowidth"] +|============================================================================= +| link:context.html[Context] | Describes in-memory pixmap
-GP_MAX3(a, b, c); +| link:basic_types.html[Basic types] | Types for size, lenght, pixel and + color
-GP_ABS(a); +| link:pixels.html[Pixel types] | Pixel types handling and interface
-GP_SWAP(a, b); +| link:get_put_pixel.html[GetPixel and PutPixel] | Macros and functions to + get and put pixels
-GP_SIGN(a); +| link:blits.html[Blits] | Blits (copies) a rectangular area from one context to + another as well as simple pixel format conversions
-GP_ARRAY_SIZE(arr); +| link:progress_callback.html[Progress Callback] | Progress callback passed + to all + link:filters.html[filters] + and + link:loaders.html[loaders]
-GP_CONTAINER_OF(ptr, structure, member); +| link:debug.html[Debug layer] | Library debug layer
-------------------------------------------------------------------------------- +| link:core_common.html[Common macros] | Common macros and semi-internal + interface
-These common macros implements basic functions such as minimum, maximum, -absolute value, swap and sign. - -All macros use 'typeof()' in order to evaluate their arguments exactly once. - -The 'GP_ARRAY_SIZE()' macro computes size of statically defined array (i.e. -returns +sizeof(array) / sizeof(elem)+). - -The 'GP_CONTAINER_OF()' macro computes pointer to a structure given pointer to -its member. - -[source,c] -------------------------------------------------------------------------------- -#include <core/GP_Clamp.h> - -/* - * Clamps integer value to 8 bit unsigned value. - */ -GP_CLAMP_INT_0_255(val); - -/* - * Clamps integer value. - */ -GP_CLAMP(val, min, max); - -------------------------------------------------------------------------------- - -Value clamping macros. - -NOTE: this header is not included by including the 'GP.h' header. - -Temporary Buffer Allocator -~~~~~~~~~~~~~~~~~~~~~~~~~~ - -Temporary buffer allocator is used to allocate temporary buffer needed for -certain operations (mostly used in image filters). - -The intended usage of temporary buffers is: - -* Count sum of the size needed for all buffers -* Allocate temporary buffer of this size -* Partition the buffer into smaller blocks -* Use the blocks as needed -* Once operation is done, free the buffer - -The allocator code greatly simplifies these steps. Moreover it avoids memory -fragmentation by creating small buffers on the process stack (current theshold -is set to 2kB) and by grouping the temporary buffers into one continuous -region. - -NOTE: The allocator itself does not align the resulting blocks. It's your - responsibility to allocate the buffers in a way that the result is - adequately aligned (hint: the start of the block is aligned, so - get blocks that needs to be aligned first). - -[source,c] -------------------------------------------------------------------------------- -#include <core/GP_TempAlloc.h> - -/* - * A macro that creates block allocator. - * - * The name must be unique among variable and functions names. - * - * The bsize is actual size of the block allocated. - */ -GP_TempAllocCreate(name, bsize); - -/* - * A macro that returns pointer to the start of a block of a bsize - * partioned from the block allocator passed as self argument. - */ -GP_TempAllocGet(self, bsize); - -/* - * Free the allocator memory. - */ -GP_TempAllocFree(self); -------------------------------------------------------------------------------- - -Example usage of the allocator: - -[source,c] -------------------------------------------------------------------------------- -#include <core/GP_TempAlloc.h> - -int foo(...) -{ - GP_TempAllocCreate(tmp, 3 * img->width); - - uint8_t *R = GP_TempAllocGet(tmp, img->width); - uint8_t *G = GP_TempAllocGet(tmp, img->width); - uint8_t *B = GP_TempAllocGet(tmp, img->width); - - /* start of the code that uses the buffers */ - - ... - - if (error) { - GP_TempAllocFree(self); - return -1; - } - - ... - - /* end of the code that uses the buffers */ - - GP_TempAllocFree(self); - - return 0; -} -------------------------------------------------------------------------------- +| link:environment_variables.html[Environment variables] | Environment variables
+|============================================================================= diff --git a/doc/core.txt b/doc/core_common.txt similarity index 100% copy from doc/core.txt copy to doc/core_common.txt diff --git a/doc/get_put_pixel.txt b/doc/get_put_pixel.txt index 3c5e716..86d90c7 100644 --- a/doc/get_put_pixel.txt +++ b/doc/get_put_pixel.txt @@ -43,7 +43,7 @@ void GP_PutPixel_Raw_{{ bpp }}(GP_Context *c, GP_Coord x, GP_Coord y, --------------------------------------------------------------------------------
These functions are generally fast, but does not honour context rotation flags -and do not check coordinates. +and do not check that coordinates are inside of the context.
They are intended as basic building blocks for other GFX primitives, filters, etc. diff --git a/doc/pixels.txt b/doc/pixels.txt index d6c18e8..37553c4 100644 --- a/doc/pixels.txt +++ b/doc/pixels.txt @@ -10,7 +10,7 @@ Pixel Type ------------------------------------------------------------------------------- #include <GP.h> /* or */ -#include <core/GP_Pixel.h> +#include <core/GP_Pixel.gen.h>
typedef enum GP_PixelType { GP_PIXEL_UNKNOWN, @@ -28,14 +28,15 @@ typedef enum GP_PixelType {
/* * The same values are also defined as macros so it's possible to - * use them with ifdef as follows. + * use them with ifdef as: + * #ifdef GP_PIXEL_RGB555 + * ... + * #endif /* GP_PIXEL_RGB555 */ */ -#ifdef GP_PIXEL_RGB555 - +#define GP_PIXEL_UNKNOWN GP_PIXEL_UNKNOWN +#define GP_PIXEL_xRGB8888 GP_PIXEL_xRGB8888 ...
-#endif /* GP_PIXEL_RGB555 */ - -------------------------------------------------------------------------------
Pixels are described by a pixel type, which is enumeration type. The enum is diff --git a/doc/progress_callback.txt b/doc/progress_callback.txt index 38719e7..e12dccf 100644 --- a/doc/progress_callback.txt +++ b/doc/progress_callback.txt @@ -1,9 +1,6 @@ Progress Callback -----------------
-Progress Callback -~~~~~~~~~~~~~~~~~ - The 'GP_ProgressCallback' is a structure that stores user-defined callback function and user-defined pointer and percentage.
@@ -11,7 +8,8 @@ It is passed as last parameter to functions that would take some time to complete and adds capability to track the operation progress as well as to abort the operation.
-Currently it's used for filters and loaders. +Currently it's used in link:filters.html[filters] and +link:loaders.html[loaders].
[source,c] ------------------------------------------------------------------------------- @@ -22,12 +20,21 @@ typdedef struct GP_ProgressCallback { } GP_ProgressCallback; -------------------------------------------------------------------------------
-If non 'NULL' progress callback structure is passed to a function, the -callback function is periodically called and the percentage is updated. +The 'callback' pointer is a pointer to user defined callback function. + +The 'priv' pointer can be used to pass a pointer to the callback function and +can accessed inside of the callback by defererencin the 'self' argument. + +The 'percentage' field is updated by the function the callback was passed to +and is increased monotonically till it reaches 100. + +If 'non-NULL' progress callback structure is passed to a function, it's called +periodically and the percentage field is updated.
-The return value from callback could abort the function execution. If non zero -value is returned operation is aborted, all memory freed etc. and in case of -bitmap loaders 'errno' is set to 'ECANCELED'. +The return value from callback could abort the execution. If a non-zero value +is returned operation is aborted, all memory freed etc., in case of pixmap +loaders 'errno' is set to 'ECANCELED' and in case of pixmap savers the newly +created file is removed too.
The callback, if supported, is the last parameter of a function.
http://repo.or.cz/w/gfxprim.git/commit/282b616826f4ad7cfd9c3b804c649e61e56a9...
commit 282b616826f4ad7cfd9c3b804c649e61e56a9b32 Author: Cyril Hrubis metan@ucw.cz Date: Sun Dec 1 19:56:28 2013 +0100
doc: Remove unused pixel_types.txt.
Signed-off-by: Cyril Hrubis metan@ucw.cz
diff --git a/doc/pixel_types.txt b/doc/pixel_types.txt deleted file mode 100644 index ee0111c..0000000 --- a/doc/pixel_types.txt +++ /dev/null @@ -1,56 +0,0 @@ -Supported pixel sizes ---------------------- - -The default maximum size of a single pixel is 32 bits. The limitations would -be analogous for other settings (8, 16 and 64). - -Pixel sizes 8, 16 and 32 are supported on all systems and generally very efficient -(assignment is used for all operations). 24 bpp is supported, but the operations may be -slightly slower. - -Pixel sizes 1, 2 and 4 depend on bit-endian setting and are supported on all systems. -Subcontext operations and blits may be slower in case of a different subpixel alignment. - -Pixel sizes not divisible by 8 and between 9 and 23 depend on the bit endian - -the endianity of the system must match the bit-endianity. The other combination -is not supported at all - it would be too complicated and probably very inefficient -to decode/encode. - -Pixel sizes between 25 and 31 are not supported at all, as these pixels might not fit -into a 32-bit byte-aligned window. - -The pixel sizes to be supported must be explicitly listed in the configuration file, -each including the bit-endian if required (see below). - -Supported pixel types ---------------------- - -The supported files are declared in the configuration file and must use only the declared -pixel sizes with bit-endians. RGB, monochrome and palette formats are supported, -all with optional alpha channel (the alpha support level for palette types is not decided yet). - -The pixel type - -System endianity ----------------- - -The library should work on both little-endian and big-endian systems. -Other variants than the standard (0123 and 3210) are not supported. - -In case of pixel sizes between 9 and 23 (except for 16), the system endianity must match the -selected bit endianity. It is safe to build the library with the disallowed combination -format, as long as it is not used (compile-time warning is generated). - -Bit-endianity -------------- - -With 1, 2 and 4 bpp formats, there are two possible orders of pixels within a byte, -both seen in the wild. The two are enumerated in `GP_BIT_ENDIAN`: - -`GP_BIT_ENDIAN_LE`:: - Less significant bits contain pixels with lower indices. - Also used for irrelevant bit-endian (8, 15, 24, 32bpp). -`GP_BIT_ENDIAN_BE`:: - More significant bits contain pixels with lower indices. - -
http://repo.or.cz/w/gfxprim.git/commit/f63f5aa939d96a4abb0b345470dd7d92ab65a...
commit f63f5aa939d96a4abb0b345470dd7d92ab65a360 Author: Cyril Hrubis metan@ucw.cz Date: Sun Dec 1 19:05:30 2013 +0100
doc: Autogenerate table of all examples + cleanup.
Signed-off-by: Cyril Hrubis metan@ucw.cz
diff --git a/doc/.gitignore b/doc/.gitignore index 670b96a..4731cc5 100644 --- a/doc/.gitignore +++ b/doc/.gitignore @@ -13,3 +13,5 @@ bit-endian-be-1bit.png bit-endian-be-2bits.png bit-endian-le-1bit.png bit-endian-le-2bits.png + +examples.txt diff --git a/doc/Makefile b/doc/Makefile index a9121f7..197e81d 100644 --- a/doc/Makefile +++ b/doc/Makefile @@ -21,6 +21,7 @@ GENIMAGES=discrete_linear_1D_convolution_alg1 discrete_linear_1D_convolution_alg
PAGES=$(subst .txt,.html,$(SOURCES)) PAGES+=$(subst .txt,.html,$(EXAMPLE_SOURCES)) +PAGES+=examples.html
.PHONY: toolcheck clean
@@ -58,14 +59,18 @@ toolcheck: $(PAGES): %.html: %.txt asciidoc $(ASCIIDOC_PARAMS) $<
-examples.html: examples.txt ../demos/c_simple/*.c ../demos/py_simple/*.py asciidoc.conf - asciidoc $(ASCIIDOC_PARAMS) -a toc examples.txt +# +# Autogenerate examples page +# +examples.txt: $(EXAMPLE_SOURCES) gen_examples_page.sh + ./gen_examples_page.sh examples.txt
# # Clean up generated images # CLEAN+=$(patsubst %,%.md5,$(GENIMAGES)) CLEAN+=$(patsubst %,%.png,$(GENIMAGES)) +CLEAN+=examples.txt
# # Clean up generated pages diff --git a/doc/asciidoc.conf b/doc/asciidoc.conf index 4cc241a..240991d 100644 --- a/doc/asciidoc.conf +++ b/doc/asciidoc.conf @@ -45,6 +45,7 @@ ifdef::toc2[<link rel="stylesheet" href="{stylesdir=.}/toc2.css" type="text/css" <li><a href="index.html">Home</a></li> <li><a href="about.html">About</a></li> <li><a href="compilation.html">Compilation</a></li> + <li><a href="examples.html">Examples</a></li> </ul> C API Pages <ul> diff --git a/doc/backends.txt b/doc/backends.txt index e124cca..46a631a 100644 --- a/doc/backends.txt +++ b/doc/backends.txt @@ -195,7 +195,8 @@ Currently the 'AA-lib' backend uses default initialization parameters. Way how to pass 'AA-lib' specific parameters will be added. This interface will likely change.
-Overall init function +[[Backend_Init]] +Backend init function ~~~~~~~~~~~~~~~~~~~~~
Although there is no unified backend initialization, there is something close to @@ -436,6 +437,7 @@ queue and the call returns. } -------------------------------------------------------------------------------
+[[Timers]] GP_BackendAddTimer ^^^^^^^^^^^^^^^^^^
@@ -594,6 +596,7 @@ NOTE: The backend->context pointer may change upon calling this function and at least backend->context->pixels pointer will change.
+[[ResizeAck]] GP_BackendResizeAck ^^^^^^^^^^^^^^^^^^^
diff --git a/doc/backends_python.txt b/doc/backends_python.txt index 65ff893..a5c2206 100644 --- a/doc/backends_python.txt +++ b/doc/backends_python.txt @@ -44,7 +44,7 @@ the other hand, has its own input queue.
TIP: See multiple windows link:example_py_x11_windows.html[example].
- +[[Backend_Init]] BackendInit ^^^^^^^^^^^
diff --git a/doc/debug.txt b/doc/debug.txt index aedef2a..83cf91d 100644 --- a/doc/debug.txt +++ b/doc/debug.txt @@ -67,7 +67,7 @@ void GP_DebugPrint(int level, const char *file, const char *function, int line, -------------------------------------------------------------------------------
Printf-like macros used to print debug messages. All of them calls the -'GP_DebugPrint()' function with slightly parameters. +'GP_DebugPrint()' function with slightly different parameters.
[source,c] ------------------------------------------------------------------------------- diff --git a/doc/example_SDL_glue.txt b/doc/example_SDL_glue.txt index aab453f..804898f 100644 --- a/doc/example_SDL_glue.txt +++ b/doc/example_SDL_glue.txt @@ -1,5 +1,5 @@ -SDL Glue Example ----------------- +SDL Glue +--------
You can easily mix SDL and GFXprim code using 'GP_ContextFromSDLSurface()' function. diff --git a/doc/example_backend.txt b/doc/example_backend.txt index ed13dea..55e7f16 100644 --- a/doc/example_backend.txt +++ b/doc/example_backend.txt @@ -1,5 +1,11 @@ -Graphics Backend Example ------------------------- +Graphics Backend +---------------- +This is a very simple backend example that shows how to use +link:backends.html#Backend_Init[backend init function] and +link:input.html[input event layer]. + +It also shows how to handle +link:backends.html#ResizeAck[window resize events].
[source,c] ------------------------------------------------------------------ diff --git a/doc/example_backend_timers.txt b/doc/example_backend_timers.txt index e9d479f..ce57a85 100644 --- a/doc/example_backend_timers.txt +++ b/doc/example_backend_timers.txt @@ -1,5 +1,6 @@ -Backend Timers Example ----------------------- +Backend Timers +-------------- +This example shows how to use link:backends.html#Timers[backend timers].
[source,c] ------------------------------------------------------------------ diff --git a/doc/example_debug_handler.txt b/doc/example_debug_handler.txt index a859f68..67f28ee 100644 --- a/doc/example_debug_handler.txt +++ b/doc/example_debug_handler.txt @@ -1,5 +1,7 @@ -Debug Message Handler Example ------------------------------ +Custom Debug Message Handler +---------------------------- +This example shows how to redirect link:debug.html[library debug messages] +into a custom debug message handler.
[source,c] ------------------------------------------------------------------ diff --git a/doc/example_fonts.txt b/doc/example_fonts.txt index 85a6618..4c4b79b 100644 --- a/doc/example_fonts.txt +++ b/doc/example_fonts.txt @@ -1,6 +1,9 @@ -Font Test Example ------------------ -.A simple program to show all font characters with different styles. +Font and Text rendering +----------------------- + +Fonttest +~~~~~~~~ +A simple program to show all font characters with different styles.
[source,c] ------------------------------------------------------------------ @@ -8,8 +11,8 @@ include::../demos/c_simple/fonttest.c[] ------------------------------------------------------------------
Fileview --------- -.A simple program to show contents of a file. +~~~~~~~~ +A simple program to show contents of a file.
[source,c] ------------------------------------------------------------------ diff --git a/doc/example_gaussian_noise.txt b/doc/example_gaussian_noise.txt index 1f023d8..95b8a81 100644 --- a/doc/example_gaussian_noise.txt +++ b/doc/example_gaussian_noise.txt @@ -1,5 +1,6 @@ -Gaussian Additive Noise Filter Example --------------------------------------- +Gaussian Additive Noise Filter +------------------------------ +Simple program that adds a gaussian distributed noise to the image.
[source,c] ------------------------------------------------------------------ diff --git a/doc/example_input.txt b/doc/example_input.txt index 15b7233..8132a26 100644 --- a/doc/example_input.txt +++ b/doc/example_input.txt @@ -1,5 +1,6 @@ -Input Events Example --------------------- +Input Events Handling +--------------------- +This example shows how to handle most of the link:input.html[input events].
[source,c] ------------------------------------------------------------------ diff --git a/doc/example_loader_registration.txt b/doc/example_loader_registration.txt index b287560..fd4f348 100644 --- a/doc/example_loader_registration.txt +++ b/doc/example_loader_registration.txt @@ -1,5 +1,10 @@ -Image Loader Registration Example ---------------------------------- +Image Loader Registration +------------------------- +This example shows how to +link:loaders.html#Register_Loader[register custom image loader] +so that library functions such as +link:loaders.html#Load_Image[GP_LoadImage()] and +link:loaders.html#Save_Image[GP_SaveImage()] can use it.
[source,c] ------------------------------------------------------------------ diff --git a/doc/example_loaders_progress_callback.txt b/doc/example_loaders_progress_callback.txt index 7da5160..6024c74 100644 --- a/doc/example_loaders_progress_callback.txt +++ b/doc/example_loaders_progress_callback.txt @@ -1,5 +1,7 @@ -Graphics Backend Example ------------------------- +Loaders with Progress Callback +------------------------------ +This example shows how to use link:progress_callback.html[progress callback] +together with link:loaders.html[image loaders functions].
[source,c] ------------------------------------------------------------------ diff --git a/doc/example_py_backends.txt b/doc/example_py_backends.txt index 625084c..5ff7213 100644 --- a/doc/example_py_backends.txt +++ b/doc/example_py_backends.txt @@ -1,6 +1,7 @@ Backend Init ------------ -.A simple program to demonstrate backend init function. +A simple program to demonstrate +link:backends_python.html#Backend_Init[backend init function].
[source,python] ------------------------------------------------------------------ diff --git a/doc/example_py_blur.txt b/doc/example_py_blur.txt index cfe5577..c8ab4d1 100644 --- a/doc/example_py_blur.txt +++ b/doc/example_py_blur.txt @@ -1,6 +1,6 @@ -Gaussian Blur Example ---------------------- -.A simple program that loads image, blurs it and saves result +Gaussian Blur Filter +-------------------- +A simple program that loads image, blurs it and saves result.
[source,python] ------------------------------------------------------------------ diff --git a/doc/example_py_convolution.txt b/doc/example_py_convolution.txt index 0cdfe06..58ee950 100644 --- a/doc/example_py_convolution.txt +++ b/doc/example_py_convolution.txt @@ -1,6 +1,6 @@ -Block Blur Convolution Example ------------------------------- -.A simple program that loads image, blurs it and saves result +Box Blur Convolution +-------------------- +A simple program that loads image, blurs it and saves result.
[source,python] ------------------------------------------------------------------ diff --git a/doc/example_py_dithering.txt b/doc/example_py_dithering.txt index d187c7d..6b3fd9e 100644 --- a/doc/example_py_dithering.txt +++ b/doc/example_py_dithering.txt @@ -1,6 +1,6 @@ -Dithering Example ------------------ -.A simple program that loads image, dithers it and saves result +Floyd-Steinberg Dithering +------------------------- +A simple program that loads image, dithers it and saves result.
[source,python] ------------------------------------------------------------------ diff --git a/doc/example_py_gfx.txt b/doc/example_py_gfx.txt index 2c8854d..4102f96 100644 --- a/doc/example_py_gfx.txt +++ b/doc/example_py_gfx.txt @@ -1,6 +1,6 @@ -Gfx ---- -.A simple program to show how to use gfx +GFX Primitives +-------------- +A simple program to show how to use most of the graphics primitives.
[source,python] ------------------------------------------------------------------ diff --git a/doc/example_py_showimage.txt b/doc/example_py_showimage.txt index 10e6e51..608d500 100644 --- a/doc/example_py_showimage.txt +++ b/doc/example_py_showimage.txt @@ -1,6 +1,6 @@ Showimage --------- -.A simple program to load and show image +A very simple program that loads an image and shows it in a window.
[source,python] ------------------------------------------------------------------ diff --git a/doc/example_py_x11_windows.txt b/doc/example_py_x11_windows.txt index 7d454a9..d077760 100644 --- a/doc/example_py_x11_windows.txt +++ b/doc/example_py_x11_windows.txt @@ -1,6 +1,6 @@ -X11 Windows ------------ -.A simple program to demonstrate multiple windows with X11 +X11 backend with multiple windows +--------------------------------- +A simple program to demonstrate multiple windows on X11 backend.
[source,python] ------------------------------------------------------------------ diff --git a/doc/example_v4l2.txt b/doc/example_v4l2.txt index 2f1e389..cfa6de9 100644 --- a/doc/example_v4l2.txt +++ b/doc/example_v4l2.txt @@ -1,7 +1,8 @@ -Graphics Backend Example +Grabbers (v4l2) Examples ------------------------
-Simple grabber that saves images taken from v4l2 device. +Simple link:grabbers.html[grabber example] that saves images taken from v4l2 +device.
[source,c] ------------------------------------------------------------------ diff --git a/doc/example_x11_windows.txt b/doc/example_x11_windows.txt index 4e4bb31..a5f0406 100644 --- a/doc/example_x11_windows.txt +++ b/doc/example_x11_windows.txt @@ -1,6 +1,6 @@ -Graphics Backend Example ------------------------- -.An example how to create and manage two windows using the X11 backend +X11 Backend with multiple windows +--------------------------------- +This example shows how to create multiple X11 windows.
[source,c] ------------------------------------------------------------------ diff --git a/doc/examples.txt b/doc/examples.txt index 0f6566b..d96b7f8 100644 --- a/doc/examples.txt +++ b/doc/examples.txt @@ -1,122 +1,38 @@ -Image loaders examples ----------------------- - -Loads an image and saves it into 'out.png' png image. - -Example in C -~~~~~~~~~~~~ - -[source,c] ------------------------------------------------------------------- -include::../demos/c_simple/loaders_example.c[] ------------------------------------------------------------------- - -Example in C utilizing progress callback -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - -[source,c] ------------------------------------------------------------------- -include::../demos/c_simple/loaders.c[] ------------------------------------------------------------------- - -Example in C using image meta-data interface -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - -[source,c] ------------------------------------------------------------------- -include::../demos/c_simple/meta_data.c[] ------------------------------------------------------------------- - -[source,c] ------------------------------------------------------------------- -include::../demos/c_simple/meta_data_dump.c[] ------------------------------------------------------------------- - -Example in Python -~~~~~~~~~~~~~~~~~ - -[source,python] ------------------------------------------------------------------- -include::../demos/py_simple/loaders_example.py[] ------------------------------------------------------------------- - -GFX Examples ------------- - -Drawing Lines -~~~~~~~~~~~~~ - -Example in C -^^^^^^^^^^^^ - -[source,c] ------------------------------------------------------------------- -include::../demos/c_simple/gfx_koch.c[] ------------------------------------------------------------------- - -Filters -------- - -Symmetry filters (Rotation, Mirroring) -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - -Example in C -^^^^^^^^^^^^ - -[source,c] ------------------------------------------------------------------- -include::../demos/c_simple/filters_symmetry.c[] ------------------------------------------------------------------- - -Example in Python -^^^^^^^^^^^^^^^^^ - -[source,python] ------------------------------------------------------------------- -include::../demos/py_simple/rotate90.py[] ------------------------------------------------------------------- - -Simple backend example ----------------------- - -Basic backend code example. Initalizes backends, draws a cross and dumps -events. - -Example in C -~~~~~~~~~~~~ - -[source,c] ------------------------------------------------------------------- -include::../demos/c_simple/backend_example.c[] ------------------------------------------------------------------- - -[source,c] ------------------------------------------------------------------- -include::../demos/c_simple/showimage.c[] ------------------------------------------------------------------- - -Grabbers --------- - -Simple C source that saves JPEG images from V4L2 device (web camera). - -[source,c] ------------------------------------------------------------------- -include::../demos/c_simple/v4l2_grab.c[] ------------------------------------------------------------------- - -Simple C source that shows filters interactively on image stream from a -camera. - -[source,c] ------------------------------------------------------------------- -include::../demos/c_simple/v4l2_show.c[] ------------------------------------------------------------------- - -GFXprim + PyGTK ---------------- - -[source,python] ------------------------------------------------------------------- -include::../demos/py_simple/pygtk_example.py[] ------------------------------------------------------------------- +List of examples +---------------- +Following pages contains a list of all code examples, the source +files could be found and are compiled in the +demos/c_simple/+ and ++demos/py_simple+ directories in the source tree. + +.List C examples +[grid="rows"] +[options="autowidth,header",cols="<,<m"] +|=========================== +| Example | Source filename(s) +| link:example_SDL_glue.html[SDL Glue] | SDL_glue.c +| link:example_backend.html[Graphics Backend] | backend_example.c +| link:example_backend_timers.html[Backend Timers] | backend_timers_example.c +| link:example_debug_handler.html[Custom Debug Message Handler] | debug_handler.c +| link:example_fonts.html[Font and Text rendering] | fonttest.c +fileview.c +| link:example_gaussian_noise.html[Gaussian Additive Noise Filter] | gaussian_noise.c +| link:example_input.html[Input Events Handling] | input_example.c +| link:example_loader_registration.html[Image Loader Registration] | loaders_register.c +| link:example_loaders_progress_callback.html[Loaders with Progress Callback] | loaders.c +| link:example_v4l2.html[Grabbers (v4l2) Examples] | v4l2_grab.c +v4l2_show.c +| link:example_x11_windows.html[X11 Backend with multiple windows] | x11_windows.c +|=========================== +.List Python examples +[grid="rows"] +[options="autowidth,header",cols="<,<m"] +|=========================== +| Example | Source filename(s) +| link:example_py_backends.html[Backend Init] | backends.py +| link:example_py_blur.html[Gaussian Blur Filter] | blur.py +| link:example_py_convolution.html[Box Blur Convolution] | convolution.py +| link:example_py_dithering.html[Floyd-Steinberg Dithering] | dither.py +| link:example_py_gfx.html[GFX Primitives] | gfx.py +| link:example_py_showimage.html[Showimage] | showimage.py +| link:example_py_x11_windows.html[X11 backend with multiple windows] | x11_windows.py +|=========================== diff --git a/doc/gen_examples_page.sh b/doc/gen_examples_page.sh new file mode 100755 index 0000000..eb94a4d --- /dev/null +++ b/doc/gen_examples_page.sh @@ -0,0 +1,56 @@ +#!/bin/sh +# +# Autogenerate examples page +# +OUT="$1" + +get_names() +{ + LINKS=$(grep 'include:.*' $1) + NAMES=$(echo $LINKS | sed 's/include:://g' | sed 's/[]//g') + for i in $NAMES; do + echo $(basename $i) + done +} + +table_header() +{ + echo ".List $1 examples" >> $OUT + echo "[grid="rows"]" >> $OUT + echo '[options="autowidth,header",cols="<,<m"]' >> $OUT + echo "|===========================" >> $OUT + echo "| Example | Source filename(s)" >> $OUT +} + +table_footer() +{ + echo "|===========================" >> $OUT +} + +echo "List of examples" > $OUT +echo "----------------" >> $OUT +echo "Following pages contains a list of all code examples, the source " >> $OUT +echo "files could be found and are compiled in the +demos/c_simple/+ and" >> $OUT +echo "+demos/py_simple+ directories in the source tree." >> $OUT +echo >> $OUT + +table_header "C" +for i in example_*.txt; do + LINK=$(echo $i | sed s/.txt/.html/) + DESC=$(head -n 1 $i) + FNAMES=$(get_names "$i") + if $(echo $i | grep -q '_py_'); then + continue + fi + echo "| link:$LINK[$DESC] | $FNAMES" >> $OUT +done +table_footer + +table_header "Python" +for i in example_py_*.txt; do + LINK=$(echo $i | sed s/.txt/.html/) + DESC=$(head -n 1 $i) + FNAMES=$(get_names "$i") + echo "| link:$LINK[$DESC] | $FNAMES" >> $OUT +done +table_footer diff --git a/doc/loaders.txt b/doc/loaders.txt index 3b8e283..b42c47e 100644 --- a/doc/loaders.txt +++ b/doc/loaders.txt @@ -8,8 +8,8 @@ saving and GIF, JPEG2000 and PSP for loading.
Have a look at the link:about.html#Loaders[supported formats].
-Loaders API -~~~~~~~~~~~ +Image Loaders and Savers +~~~~~~~~~~~~~~~~~~~~~~~~
All loading functions returns a pointer to allocated and loaded image or upon a failure 'NULL'. @@ -18,12 +18,10 @@ All saving functions returns zero on success and non-zero on failure. If image saving is aborted by a callback, the opened file is closed and removed from a filesystem before the call returns.
-In case of a failure 'errno' is set. - The signature matching functions takes a 32 bytes long buffer and looks for a -valid image signature. If signature is found 1 is returned. +valid image signature. If signature is found non-zero is returned.
-The possible 'errno' values are: +In case of a failure 'errno' is set, possible 'errno' values are:
* anything returned by +open()+, +close()+, +lseek()+, +read()+, +write()+, ... - 'ENOENT' if file doesn't exist @@ -38,9 +36,8 @@ The possible 'errno' values are: You can get more information about the error condition by turning on GFXprim link:environment_variables.html#GP_DEBUG[debug messages].
-Image Loader -~~~~~~~~~~~~
+[[Load_Image]] [source,c] ------------------------------------------------------------------------------- #include <loaders/GP_Loader.h> @@ -66,6 +63,7 @@ is returned. If file extension disagrees with file signature on the file format a warning is printed into the 'stderr'.
+[[Save_Image]] [source,c] ------------------------------------------------------------------------------- #include <loaders/GP_Loader.h> @@ -89,8 +87,9 @@ wasn't compiled with support for this image type). If context pixel type is not supported by the format 'errno' is set to 'EINVAL'.
-Advanced usage -^^^^^^^^^^^^^^ +[[Register_Loader]] +Advanced Loaders usage +^^^^^^^^^^^^^^^^^^^^^^
[source,c] ------------------------------------------------------------------------------- @@ -161,10 +160,10 @@ extensions that are commonly used for this image format. All internal loaders are all described in list of this structures which is used to implement functions such as 'GP_LoadImage()'.
-You can print currently active loaders via the 'GP_ListLoaders()' register and +You can print currently active loaders via the 'GP_ListLoaders()'. Register and unregister your own loaders by 'GP_LoaderRegister()' and 'GP_LoaderUnregister()'. Once image loader is registered the generic loading -functions could use it to load and save images. +functions can use it to load and save images.
TIP: For example usage see image loader registration link:example_loader_registration.html[example].
-----------------------------------------------------------------------
Summary of changes: doc/.gitignore | 2 + doc/Makefile | 11 ++- doc/asciidoc.conf | 2 + doc/backends.txt | 5 +- doc/backends_python.txt | 2 +- doc/context.txt | 33 ++++-- doc/core.txt | 167 ++++++----------------------- doc/{core.txt => core_common.txt} | 0 doc/debug.txt | 2 +- doc/example_SDL_glue.txt | 4 +- doc/example_backend.txt | 10 ++- doc/example_backend_timers.txt | 5 +- doc/example_debug_handler.txt | 6 +- doc/example_fonts.txt | 13 ++- doc/example_gaussian_noise.txt | 5 +- doc/example_input.txt | 5 +- doc/example_loader_registration.txt | 9 ++- doc/example_loaders_progress_callback.txt | 6 +- doc/example_py_backends.txt | 3 +- doc/example_py_blur.txt | 6 +- doc/example_py_convolution.txt | 6 +- doc/example_py_dithering.txt | 6 +- doc/example_py_gfx.txt | 6 +- doc/example_py_showimage.txt | 2 +- doc/example_py_x11_windows.txt | 6 +- doc/example_v4l2.txt | 5 +- doc/example_x11_windows.txt | 6 +- doc/examples.txt | 160 +++++++--------------------- doc/gen_examples_page.sh | 56 ++++++++++ doc/get_put_pixel.txt | 2 +- doc/loaders.txt | 23 ++-- doc/pixel_types.txt | 56 ---------- doc/pixels.txt | 13 ++- doc/progress_callback.txt | 25 +++-- 34 files changed, 271 insertions(+), 397 deletions(-) copy doc/{core.txt => core_common.txt} (100%) create mode 100755 doc/gen_examples_page.sh delete mode 100644 doc/pixel_types.txt
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