mutter/gles/cogl-context.h
Neil Roberts 7223b0a1a5 Fix GLES 2 after the multiple-texture-rectangle branch merge
The GLES 2 wrapper needs to set up some state before each
draw. Previously this was acheived by wrapping glDrawArrays. Since the
multiple-texture-rectangle branch merge, glDrawElements is used
instead so we also need a wrapper for that.

It was also directly calling glBindTexture. GLES 2 uses a wrapper for
this function so that it can cope with GL_ALPHA format textures. The
format of the current texture needs to be stored as well as the target
and object number for this to work.
2009-01-13 16:52:39 +00:00

112 lines
2.9 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_CONTEXT_H
#define __COGL_CONTEXT_H
#include "cogl-primitives.h"
#include "cogl-clip-stack.h"
#include "cogl-gles2-wrapper.h"
typedef struct
{
GLfloat v[3];
GLfloat t[2];
GLubyte c[4];
} CoglTextureGLVertex;
typedef struct
{
/* Features cache */
CoglFeatureFlags feature_flags;
gboolean features_cached;
/* Enable cache */
gulong enable_flags;
guint8 color_alpha;
COGLenum blend_src_factor;
COGLenum blend_dst_factor;
gboolean enable_backface_culling;
/* Primitives */
CoglFixedVec2 path_start;
CoglFixedVec2 path_pen;
GArray *path_nodes;
guint last_path;
CoglFixedVec2 path_nodes_min;
CoglFixedVec2 path_nodes_max;
/* Cache of inverse projection matrix */
CoglFixed inverse_projection[16];
/* Textures */
GArray *texture_handles;
GArray *texture_vertices;
GArray *texture_indices;
/* The gl texture number that the above vertices apply to. This to
detect when a different slice is encountered so that the vertices
can be flushed */
GLuint texture_current;
GLenum texture_target;
GLenum texture_format;
/* Framebuffer objects */
GArray *fbo_handles;
CoglBufferTarget draw_buffer;
/* Shaders */
GArray *program_handles;
GArray *shader_handles;
/* Mesh */
GArray *mesh_handles;
/* Clip stack */
CoglClipStackState clip;
#ifdef HAVE_COGL_GLES2
CoglGles2Wrapper gles2;
/* Viewport store for FBOs. Needed because glPushAttrib() isn't
supported */
GLint viewport_store[4];
#endif
} CoglContext;
CoglContext *
_cogl_context_get_default ();
/* Obtains the context and returns retval if NULL */
#define _COGL_GET_CONTEXT(ctxvar, retval) \
CoglContext *ctxvar = _cogl_context_get_default (); \
if (ctxvar == NULL) return retval;
#define NO_RETVAL
#endif /* __COGL_CONTEXT_H */