mirror of
https://github.com/brl/mutter.git
synced 2024-11-27 02:20:43 -05:00
89e7552ca3
* clutter/cogl/cogl-path.h: * clutter/cogl/common/cogl-primitives.c: * clutter/cogl/common/cogl-primitives.h: * clutter/cogl/gl/cogl-primitives.c: * clutter/cogl/gles/cogl-primitives.c: Changed the semantics of cogl_path_move_to. Previously this always started a new path but now it instead starts a new disjoint sub path. The path isn't cleared until you call either cogl_path_stroke, cogl_path_fill or cogl_path_new. There are also cogl_path_stroke_preserve and cogl_path_fill_preserve functions. * clutter/cogl/gl/cogl-context.c: * clutter/cogl/gl/cogl-context.h: * clutter/cogl/gles/cogl-context.c: * clutter/cogl/gles/cogl-context.h: Convert the path nodes array to a GArray. * clutter/cogl/gl/cogl-texture.c: * clutter/cogl/gles/cogl-texture.c: Call cogl_clip_ensure * clutter/cogl/common/cogl-clip-stack.c: * clutter/cogl/common/cogl-clip-stack.h: Simplified the clip stack code quite a bit to make it more maintainable. Previously whenever you added a new clip it would go through a separate route to immediately intersect with the current clip and when you removed it again it would immediately rebuild the entire clip. Now when you add or remove a clip it doesn't do anything immediately but just sets a dirty flag instead. * clutter/cogl/gl/cogl.c: * clutter/cogl/gles/cogl.c: Taken away the code to intersect stencil clips when there is exactly one stencil bit. It won't work with path clips and I don't know of any platform that doesn't have eight or zero stencil bits. It needs at least three bits to intersect a path with an existing clip. cogl_features_init now just decides you don't have a stencil buffer at all if you have less than three bits. * clutter/cogl/cogl.h.in: New functions and documentation. * tests/interactive/test-clip.c: Replaced with a different test that lets you add and remove clips. The three different mouse buttons add clips in different shapes. This makes it easier to test multiple levels of clipping. * tests/interactive/test-cogl-primitives.c: Use cogl_path_stroke_preserve when using the same path again. * doc/reference/cogl/cogl-sections.txt: Document the new functions.
481 lines
16 KiB
C
481 lines
16 KiB
C
/*
|
|
* Clutter COGL
|
|
*
|
|
* A basic GL/GLES Abstraction/Utility Layer
|
|
*
|
|
* Authored By Matthew Allum <mallum@openedhand.com>
|
|
*
|
|
* Copyright (C) 2007 OpenedHand
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#ifndef __COGL_H__
|
|
#define __COGL_H__
|
|
|
|
#define __COGL_H_INSIDE__
|
|
|
|
#include <glib.h>
|
|
|
|
#include <cogl/cogl-defines-@CLUTTER_COGL@.h>
|
|
|
|
#include <cogl/cogl-mesh.h>
|
|
#include <cogl/cogl-fixed.h>
|
|
#include <cogl/cogl-color.h>
|
|
#include <cogl/cogl-offscreen.h>
|
|
#include <cogl/cogl-path.h>
|
|
#include <cogl/cogl-shader.h>
|
|
#include <cogl/cogl-texture.h>
|
|
#include <cogl/cogl-types.h>
|
|
#include <cogl/cogl-deprecated.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
/**
|
|
* SECTION:cogl
|
|
* @short_description: General purpose API
|
|
*
|
|
* General utility functions for COGL.
|
|
*/
|
|
|
|
/* Context manipulation */
|
|
|
|
/**
|
|
* cogl_create_context:
|
|
*
|
|
* FIXME
|
|
*/
|
|
gboolean cogl_create_context (void);
|
|
|
|
/**
|
|
* cogl_destroy_context:
|
|
*
|
|
* FIXME
|
|
*/
|
|
void cogl_destroy_context (void);
|
|
|
|
/* Misc */
|
|
/**
|
|
* cogl_get_features:
|
|
*
|
|
* Returns all of the features supported by COGL.
|
|
*
|
|
* Return value: A logical OR of all the supported COGL features.
|
|
*
|
|
* Since: 0.8
|
|
*/
|
|
CoglFeatureFlags cogl_get_features (void);
|
|
|
|
/**
|
|
* cogl_features_available:
|
|
* @features: A bitmask of features to check for
|
|
*
|
|
* Checks whether the given COGL features are available. Multiple
|
|
* features can be checked for by or-ing them together with the '|'
|
|
* operator. %TRUE is only returned if all of the requested features
|
|
* are available.
|
|
*
|
|
* Return value: %TRUE if the features are available, %FALSE otherwise.
|
|
*/
|
|
gboolean cogl_features_available (CoglFeatureFlags features);
|
|
|
|
/**
|
|
* cogl_get_proc_address:
|
|
* @name: the name of the function.
|
|
*
|
|
* Gets a pointer to a given GL or GL ES extension function. This acts
|
|
* as a wrapper around glXGetProcAddress() or whatever is the
|
|
* appropriate function for the current backend.
|
|
*
|
|
* Return value: a pointer to the requested function or %NULL if the
|
|
* function is not available.
|
|
*/
|
|
CoglFuncPtr cogl_get_proc_address (const gchar *name);
|
|
|
|
/**
|
|
* cogl_check_extension:
|
|
* @name: extension to check for
|
|
* @ext: list of extensions
|
|
*
|
|
* Check whether @name occurs in list of extensions in @ext.
|
|
*
|
|
* Returns: %TRUE if the extension occurs in the list, %FALSE otherwize.
|
|
*/
|
|
gboolean cogl_check_extension (const gchar *name,
|
|
const gchar *ext);
|
|
|
|
/**
|
|
* cogl_get_bitmasks:
|
|
* @red: Return location for the number of red bits or %NULL
|
|
* @green: Return location for the number of green bits or %NULL
|
|
* @blue: Return location for the number of blue bits or %NULL
|
|
* @alpha: Return location for the number of alpha bits or %NULL
|
|
*
|
|
* Gets the number of bitplanes used for each of the color components
|
|
* in the color buffer. Pass %NULL for any of the arguments if the
|
|
* value is not required.
|
|
*/
|
|
void cogl_get_bitmasks (gint *red,
|
|
gint *green,
|
|
gint *blue,
|
|
gint *alpha);
|
|
|
|
/**
|
|
* cogl_perspective:
|
|
* @fovy: Vertical of view angle in degrees.
|
|
* @aspect: Aspect ratio of diesplay
|
|
* @z_near: Nearest visible point
|
|
* @z_far: Furthest visible point along the z-axis
|
|
*
|
|
* Replaces the current projection matrix with a perspective matrix
|
|
* based on the provided values.
|
|
*/
|
|
void cogl_perspective (CoglFixed fovy,
|
|
CoglFixed aspect,
|
|
CoglFixed z_near,
|
|
CoglFixed z_far);
|
|
|
|
/**
|
|
* cogl_frustum:
|
|
* @left: Left clipping plane
|
|
* @right: Right clipping plane
|
|
* @bottom: Bottom clipping plane
|
|
* @top: Top clipping plane
|
|
* @z_near: Nearest visible point
|
|
* @z_far: Furthest visible point along the z-axis
|
|
*
|
|
* Replaces the current projection matrix with a perspective matrix
|
|
* for the given viewing frustum.
|
|
*
|
|
* Since: 0.8.2
|
|
*/
|
|
void cogl_frustum (CoglFixed left,
|
|
CoglFixed right,
|
|
CoglFixed bottom,
|
|
CoglFixed top,
|
|
CoglFixed z_near,
|
|
CoglFixed z_far);
|
|
|
|
/**
|
|
* cogl_setup_viewport:
|
|
* @width: Width of the viewport
|
|
* @height: Height of the viewport
|
|
* @fovy: Field of view angle in degrees
|
|
* @aspect: Aspect ratio to determine the field of view along the x-axis
|
|
* @z_near: Nearest visible point along the z-axis
|
|
* @z_far: Furthest visible point along the z-axis
|
|
*
|
|
* Replaces the current viewport and projection matrix with the given
|
|
* values. The viewport is placed at the top left corner of the window
|
|
* with the given width and height. The projection matrix is replaced
|
|
* with one that has a viewing angle of @fovy along the y-axis and a
|
|
* view scaled according to @aspect along the x-axis. The view is
|
|
* clipped according to @z_near and @z_far on the z-axis.
|
|
*/
|
|
void cogl_setup_viewport (guint width,
|
|
guint height,
|
|
CoglFixed fovy,
|
|
CoglFixed aspect,
|
|
CoglFixed z_near,
|
|
CoglFixed z_far);
|
|
|
|
/**
|
|
* cogl_viewport:
|
|
* @width: Width of the viewport
|
|
* @height: Height of the viewport
|
|
*
|
|
* Replace the current viewport with the given values.
|
|
*
|
|
* Since: 0.8.2
|
|
*/
|
|
void cogl_viewport (guint width,
|
|
guint height);
|
|
|
|
/**
|
|
* cogl_push_matrix:
|
|
*
|
|
* Store the current model-view matrix on the matrix stack. The matrix
|
|
* can later be restored with cogl_pop_matrix().
|
|
*/
|
|
void cogl_push_matrix (void);
|
|
|
|
/**
|
|
* cogl_pop_matrix:
|
|
*
|
|
* Restore the current model-view matrix from the matrix stack.
|
|
*/
|
|
void cogl_pop_matrix (void);
|
|
|
|
/**
|
|
* cogl_scale:
|
|
* @x: Amount to scale along the x-axis
|
|
* @y: Amount to scale along the y-axis
|
|
*
|
|
* Multiplies the current model-view matrix by one that scales the x
|
|
* and y axes by the given values.
|
|
*/
|
|
void cogl_scale (CoglFixed x,
|
|
CoglFixed y);
|
|
|
|
/**
|
|
* cogl_translatex:
|
|
* @x: Distance to translate along the x-axis
|
|
* @y: Distance to translate along the y-axis
|
|
* @z: Distance to translate along the z-axis
|
|
*
|
|
* Multiplies the current model-view matrix by one that translates the
|
|
* model along all three axes according to the given values.
|
|
*/
|
|
void cogl_translatex (CoglFixed x,
|
|
CoglFixed y,
|
|
CoglFixed z);
|
|
|
|
/**
|
|
* cogl_translate:
|
|
* @x: Distance to translate along the x-axis
|
|
* @y: Distance to translate along the y-axis
|
|
* @z: Distance to translate along the z-axis
|
|
*
|
|
* Integer version of cogl_translatex(). Multiplies the current
|
|
* model-view matrix by one that translates the model along all three
|
|
* axes according to the given values.
|
|
*/
|
|
void cogl_translate (gint x,
|
|
gint y,
|
|
gint z);
|
|
|
|
/**
|
|
* cogl_rotatex:
|
|
* @angle: Angle in degrees to rotate.
|
|
* @x: X-component of vertex to rotate around.
|
|
* @y: Y-component of vertex to rotate around.
|
|
* @z: Z-component of vertex to rotate around.
|
|
*
|
|
* Multiplies the current model-view matrix by one that rotates the
|
|
* model around the vertex specified by @x, @y and @z. The rotation
|
|
* follows the right-hand thumb rule so for example rotating by 10
|
|
* degrees about the vertex (0, 0, 1) causes a small counter-clockwise
|
|
* rotation.
|
|
*/
|
|
void cogl_rotatex (CoglFixed angle,
|
|
gint x,
|
|
gint y,
|
|
gint z);
|
|
|
|
/**
|
|
* cogl_rotate:
|
|
* @angle: Angle in degrees to rotate.
|
|
* @x: X-component of vertex to rotate around.
|
|
* @y: Y-component of vertex to rotate around.
|
|
* @z: Z-component of vertex to rotate around.
|
|
*
|
|
* Integer version of cogl_rotatex(). Multiplies the current
|
|
* model-view matrix by one that rotates the model around the vertex
|
|
* specified by @x, @y and @z.
|
|
*/
|
|
void cogl_rotate (gint angle,
|
|
gint x,
|
|
gint y,
|
|
gint z);
|
|
|
|
/**
|
|
* cogl_get_modelview_matrix:
|
|
* @m: pointer to a 4x4 array of #CoglFixed<!-- -->s to receive the matrix
|
|
*
|
|
* Stores the current model-view matrix in @m. The matrix is in
|
|
* column-major order.
|
|
*/
|
|
void cogl_get_modelview_matrix (CoglFixed m[16]);
|
|
|
|
/**
|
|
* cogl_get_projection_matrix:
|
|
* @m: pointer to a 4x4 array of #CoglFixed<!-- -->s to receive the matrix
|
|
*
|
|
* Stores the current projection matrix in @m. The matrix is in
|
|
* column-major order.
|
|
*/
|
|
void cogl_get_projection_matrix (CoglFixed m[16]);
|
|
|
|
/**
|
|
* cogl_get_viewport:
|
|
* @v: pointer to a 4 element array of #CoglFixed<!-- -->s to
|
|
* receive the viewport dimensions.
|
|
*
|
|
* Stores the current viewport in @v. @v[0] and @v[1] get the x and y
|
|
* position of the viewport and @v[2] and @v[3] get the width and
|
|
* height.
|
|
*/
|
|
void cogl_get_viewport (CoglFixed v[4]);
|
|
|
|
/**
|
|
* cogl_clip_set:
|
|
* @x_offset: left edge of the clip rectangle
|
|
* @y_offset: top edge of the clip rectangle
|
|
* @width: width of the clip rectangle
|
|
* @height: height of the clip rectangle
|
|
*
|
|
* Specifies a rectangular clipping area for all subsequent drawing
|
|
* operations. Any drawing commands that extend outside the rectangle
|
|
* will be clipped so that only the portion inside the rectangle will
|
|
* be displayed. The rectangle dimensions are transformed by the
|
|
* current model-view matrix.
|
|
*
|
|
* The rectangle is intersected with the current clip region. To undo
|
|
* the effect of this function, call cogl_clip_unset().
|
|
*/
|
|
void cogl_clip_set (CoglFixed x_offset,
|
|
CoglFixed y_offset,
|
|
CoglFixed width,
|
|
CoglFixed height);
|
|
|
|
/**
|
|
* cogl_clip_set_from_path:
|
|
*
|
|
* Sets a new clipping area using the current path. The current path
|
|
* is then cleared. The clipping area is intersected with the previous
|
|
* clipping area. To restore the previous clipping area, call
|
|
* cogl_clip_unset().
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
void cogl_clip_set_from_path (void);
|
|
|
|
/**
|
|
* cogl_clip_set_from_path_preserve:
|
|
*
|
|
* Sets a new clipping area using the current path. The current path
|
|
* is then cleared. The clipping area is intersected with the previous
|
|
* clipping area. To restore the previous clipping area, call
|
|
* cogl_clip_unset().
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
void cogl_clip_set_from_path_preserve (void);
|
|
|
|
/**
|
|
* cogl_clip_unset:
|
|
*
|
|
* Reverts the clipping region to the state before the last call to
|
|
* cogl_clip_set().
|
|
*/
|
|
void cogl_clip_unset (void);
|
|
|
|
/**
|
|
* cogl_clip_ensure:
|
|
*
|
|
* Ensures that the current clipping region has been set in GL. This
|
|
* will automatically be called before any Cogl primitives but it
|
|
* maybe be neccessary to call if you are using raw GL calls with
|
|
* clipping.
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
void cogl_clip_ensure (void);
|
|
|
|
/**
|
|
* cogl_clip_stack_save:
|
|
*
|
|
* Save the entire state of the clipping stack and then clear all
|
|
* clipping. The previous state can be returned to with
|
|
* cogl_clip_stack_restore(). Each call to cogl_clip_set() after this
|
|
* must be matched by a call to cogl_clip_unset() before calling
|
|
* cogl_clip_stack_restore().
|
|
*
|
|
* Since: 0.8.2
|
|
*/
|
|
void cogl_clip_stack_save (void);
|
|
|
|
/**
|
|
* cogl_clip_stack_restore:
|
|
*
|
|
* Restore the state of the clipping stack that was previously saved
|
|
* by cogl_clip_stack_save().
|
|
*
|
|
* Since: 0.8.2
|
|
*/
|
|
void cogl_clip_stack_restore (void);
|
|
|
|
/**
|
|
* cogl_enable_depth_test:
|
|
* @setting: %TRUE to enable depth testing or %FALSE to disable.
|
|
*
|
|
* Sets whether depth testing is enabled. If it is disabled then the
|
|
* order that actors are layered on the screen depends solely on the
|
|
* order specified using clutter_actor_raise() and
|
|
* clutter_actor_lower(), otherwise it will also take into account the
|
|
* actor's depth. Depth testing is disabled by default.
|
|
*/
|
|
void cogl_enable_depth_test (gboolean setting);
|
|
|
|
/**
|
|
* cogl_enable_backface_culling:
|
|
* @setting: %TRUE to enable backface culling or %FALSE to disable.
|
|
*
|
|
* Sets whether textures positioned so that their backface is showing
|
|
* should be hidden. This can be used to efficiently draw two-sided
|
|
* textures or fully closed cubes without enabling depth testing. Only
|
|
* calls to cogl_texture_rectangle() and cogl_texture_polygon() are
|
|
* affected. Backface culling is disabled by default.
|
|
*/
|
|
void cogl_enable_backface_culling (gboolean setting);
|
|
|
|
/**
|
|
* cogl_alpha_func:
|
|
* @func: the comparison function to use, one of CGL_NEVER, CGL_LESS,
|
|
* CGL_EQUAL, CGL_LEQUAL, CGL_GREATER, CGL_NOTEQUAL, CGL_GEQUAL and GL_ALWAYS.
|
|
* @ref: reference value.
|
|
*
|
|
* Changes the alpha test to use the specified function specified in @func,
|
|
* comparing with the value in @ref. The default function is CGL_ALWAYS the
|
|
* initial reference value is 1.0.
|
|
*/
|
|
void cogl_alpha_func (COGLenum func,
|
|
CoglFixed ref);
|
|
|
|
/**
|
|
* cogl_fog_set:
|
|
* @fog_color: The color of the fog
|
|
* @density: Ignored
|
|
* @z_near: Position along z-axis where no fogging should be applied
|
|
* @z_far: Position along z-axes where full fogging should be applied
|
|
*
|
|
* Enables fogging. Fogging causes vertices that are further away from
|
|
* the eye to be rendered with a different color. The color is
|
|
* linearly interpolated so that vertices at @z_near are drawn fully
|
|
* with their original color and vertices at @z_far are drawn fully
|
|
* with @fog_color. Fogging will remain enabled until the next call to
|
|
* cogl_paint_init().
|
|
*/
|
|
void cogl_fog_set (const CoglColor *fog_color,
|
|
CoglFixed density,
|
|
CoglFixed z_near,
|
|
CoglFixed z_far);
|
|
|
|
/**
|
|
* cogl_paint_init:
|
|
* @color: Background color to clear to
|
|
*
|
|
* Clears the color buffer to @color. The depth buffer and stencil
|
|
* buffers are also cleared and fogging and lighting are disabled.
|
|
*/
|
|
void cogl_paint_init (const CoglColor *color);
|
|
|
|
G_END_DECLS
|
|
|
|
#undef __COGL_H_INSIDE__
|
|
|
|
#endif /* __COGL_H__ */
|