mutter/gles/cogl-gles2-wrapper.h
Neil Roberts 49752b06d3 * clutter/cogl/gles/cogl-texture.c: Use the wrapper for
glTexParameteri. Call glGenerateMipmap after every change to the
	texture image data.

	* clutter/cogl/gles/cogl-gles2-wrapper.h:
	* clutter/cogl/gles/cogl-gles2-wrapper.c: Added a wrapper for
	glTexParameteri so that it can ignore requests to set
	GL_GENERATE_MIPMAP. Added a wrapper for glGenerateMipmap that does
	nothing on GLES 1
2008-05-28 10:47:21 +00:00

205 lines
6.9 KiB
C

/*
* Clutter COGL
*
* A basic GL/GLES Abstraction/Utility Layer
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2008 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_GLES2_WRAPPER_H__
#define __COGL_GLES2_WRAPPER_H__
G_BEGIN_DECLS
#ifdef HAVE_COGL_GLES2
typedef struct _CoglGles2Wrapper CoglGles2Wrapper;
/* Must be a power of two */
#define COGL_GLES2_MODELVIEW_STACK_SIZE 32
#define COGL_GLES2_PROJECTION_STACK_SIZE 2
#define COGL_GLES2_TEXTURE_STACK_SIZE 2
struct _CoglGles2Wrapper
{
GLuint program;
GLuint vertex_shader;
GLuint fragment_shader;
GLint mvp_matrix_uniform;
GLint texture_matrix_uniform;
GLint texture_2d_enabled_uniform;
GLint bound_texture_uniform;
GLint alpha_only_uniform;
GLuint matrix_mode;
GLfloat modelview_stack[COGL_GLES2_MODELVIEW_STACK_SIZE * 16];
GLuint modelview_stack_pos;
GLfloat projection_stack[COGL_GLES2_PROJECTION_STACK_SIZE * 16];
GLuint projection_stack_pos;
GLfloat texture_stack[COGL_GLES2_TEXTURE_STACK_SIZE * 16];
GLuint texture_stack_pos;
/* The combined modelview and projection matrix is only updated at
the last minute in glDrawArrays to avoid recalculating it for
every change to the modelview matrix */
GLboolean mvp_uptodate;
};
/* These defines are missing from GL ES 2 but we can still use them
with the wrapper funcions */
#ifndef GL_MODELVIEW
#define GL_MODELVIEW 0x1700
#define GL_PROJECTION 0x1701
#define GL_VERTEX_ARRAY 0x8074
#define GL_TEXTURE_COORD_ARRAY 0x8078
#define GL_COLOR_ARRAY 0x8076
#define GL_LIGHTING 0x0B50
#define GL_ALPHA_TEST 0x0BC0
#define GL_FOG 0x0B60
#define GL_FOG_COLOR 0x0B66
#define GL_FOG_MODE 0x0B65
#define GL_FOG_HINT 0x0C54
#define GL_FOG_DENSITY 0x0B62
#define GL_FOG_START 0x0B63
#define GL_FOG_END 0x0B64
#define GL_CLIP_PLANE0 0x3000
#define GL_CLIP_PLANE1 0x3001
#define GL_CLIP_PLANE2 0x3002
#define GL_CLIP_PLANE3 0x3003
#define GL_MAX_CLIP_PLANES 0x0D32
#define GL_MODELVIEW_MATRIX 0x0BA6
#define GL_PROJECTION_MATRIX 0x0BA7
#define GL_GENERATE_MIPMAP 0x8191
#define GL_TEXTURE_ENV 0x2300
#define GL_TEXTURE_ENV_MODE 0x2200
#define GL_MODULATE 0x2100
#endif /* GL_MODELVIEW */
void cogl_gles2_wrapper_init (CoglGles2Wrapper *wrapper);
void cogl_gles2_wrapper_deinit (CoglGles2Wrapper *wrapper);
void cogl_wrap_glClearColorx (GLclampx r, GLclampx g, GLclampx b, GLclampx a);
void cogl_wrap_glPushMatrix ();
void cogl_wrap_glPopMatrix ();
void cogl_wrap_glMatrixMode (GLenum mode);
void cogl_wrap_glLoadIdentity ();
void cogl_wrap_glMultMatrixx (const GLfixed *m);
void cogl_wrap_glScalex (GLfixed x, GLfixed y, GLfixed z);
void cogl_wrap_glTranslatex (GLfixed x, GLfixed y, GLfixed z);
void cogl_wrap_glRotatex (GLfixed angle, GLfixed x, GLfixed y, GLfixed z);
void cogl_wrap_glOrthox (GLfixed left, GLfixed right,
GLfixed bottom, GLfixed top,
GLfixed near, GLfixed far);
void cogl_wrap_glEnable (GLenum cap);
void cogl_wrap_glDisable (GLenum cap);
void cogl_wrap_glTexCoordPointer (GLint size, GLenum type, GLsizei stride,
const GLvoid *pointer);
void cogl_wrap_glVertexPointer (GLint size, GLenum type, GLsizei stride,
const GLvoid *pointer);
void cogl_wrap_glColorPointer (GLint size, GLenum type, GLsizei stride,
const GLvoid *pointer);
void cogl_wrap_glTexEnvx (GLenum target, GLenum pname, GLfixed param);
void cogl_wrap_glEnableClientState (GLenum array);
void cogl_wrap_glDisableClientState (GLenum array);
void cogl_wrap_glAlphaFunc (GLenum func, GLclampf ref);
void cogl_wrap_glColor4x (GLclampx r, GLclampx g, GLclampx b, GLclampx a);
void cogl_wrap_glClipPlanex (GLenum plane, GLfixed *equation);
void cogl_wrap_glGetFixedv (GLenum pname, GLfixed *params);
void cogl_wrap_glFogx (GLenum pname, GLfixed param);
void cogl_wrap_glFogxv (GLenum pname, const GLfixed *params);
void cogl_wrap_glDrawArrays (GLenum mode, GLint first, GLsizei count);
void cogl_wrap_glTexParameteri (GLenum target, GLenum pname, GLfloat param);
void cogl_gles2_wrapper_bind_texture (GLenum target, GLuint texture,
GLenum internal_format);
/* This function is only available on GLES 2 */
#define cogl_wrap_glGenerateMipmap glGenerateMipmap
#else /* HAVE_COGL_GLES2 */
/* If we're not using GL ES 2 then just use the GL functions
directly */
#define cogl_wrap_glClearColorx glClearColorx
#define cogl_wrap_glDrawArrays glDrawArrays
#define cogl_wrap_glPushMatrix glPushMatrix
#define cogl_wrap_glPopMatrix glPopMatrix
#define cogl_wrap_glMatrixMode glMatrixMode
#define cogl_wrap_glLoadIdentity glLoadIdentity
#define cogl_wrap_glMultMatrixx glMultMatrixx
#define cogl_wrap_glScalex glScalex
#define cogl_wrap_glTranslatex glTranslatex
#define cogl_wrap_glRotatex glRotatex
#define cogl_wrap_glOrthox glOrthox
#define cogl_wrap_glEnable glEnable
#define cogl_wrap_glDisable glDisable
#define cogl_wrap_glTexCoordPointer glTexCoordPointer
#define cogl_wrap_glVertexPointer glVertexPointer
#define cogl_wrap_glColorPointer glColorPointer
#define cogl_wrap_glTexEnvx glTexEnvx
#define cogl_wrap_glEnableClientState glEnableClientState
#define cogl_wrap_glDisableClientState glDisableClientState
#define cogl_wrap_glAlphaFunc glAlphaFunc
#define cogl_wrap_glColor4x glColor4x
#define cogl_wrap_glClipPlanex glClipPlanex
#define cogl_wrap_glGetFixedv glGetFixedv
#define cogl_wrap_glFogx glFogx
#define cogl_wrap_glFogxv glFogxv
#define cogl_wrap_glTexParameteri glTexParameteri
/* The extra third parameter of the bind texture wrapper isn't needed
so we can just directly call glBindTexture */
#define cogl_gles2_wrapper_bind_texture(target, texture, internal_format) \
glBindTexture ((target), (texture))
/* COGL uses the automatic mipmap generation for GLES 1 so
glGenerateMipmap doesn't need to do anything */
#define cogl_wrap_glGenerateMipmap(x) ((void) 0)
#endif /* HAVE_COGL_GLES2 */
G_END_DECLS
#endif /* __COGL_GLES2_WRAPPER_H__ */