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2007-05-02 Matthew Allum <mallum@openedhand.com>

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* clutter/clutter-actor.c:
        * clutter/cogl/gles/cogl.c:
        Fix rotation + other fixed point cleanups.

        * clutter/clutter-texture.h:
        Sketch out an updated API.
This commit is contained in:
Matthew Allum 2007-05-02 09:01:11 +00:00
parent d18e432b22
commit 9d709e3e67
1 changed files with 7 additions and 95 deletions
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102
gles/cogl.c
View file

@ -37,7 +37,7 @@
static gulong __enable_flags = 0;
#define COGL_DEBUG 1
#define COGL_DEBUG 0
#if COGL_DEBUG
struct token_string
@ -250,6 +250,7 @@ cogl_texture_can_size (COGLenum pixel_format,
{
GLint new_width = 0;
/* FIXME */
return TRUE;
@ -478,52 +479,6 @@ cogl_perspective (ClutterAngle fovy,
#undef M
}
#if 0
void
cogl_perspective (ClutterAngle fovy,
ClutterFixed aspect,
ClutterFixed zNear,
ClutterFixed zFar)
{
ClutterFixed xmax, ymax;
ClutterFixed x, y, c, d;
GLfloat m[16];
memset (&m[0], 0, sizeof (m));
/*
* Based on the original algorithm in perspective():
*
* 1) xmin = -xmax => xmax + xmin == 0 && xmax - xmin == 2 * xmax
* same true for y, hence: a == 0 && b == 0;
*
* 2) When working with small numbers, we can are loosing significant
* precision, hence we use clutter_qmulx() here, not the fast macro.
*/
ymax = clutter_qmulx (zNear, clutter_tani (fovy >> 1));
xmax = clutter_qmulx (ymax, aspect);
x = CFX_DIV (zNear, xmax);
y = CFX_DIV (zNear, ymax);
c = CFX_DIV (-(zFar + zNear), ( zFar - zNear));
d = CFX_DIV (-(clutter_qmulx (2*zFar, zNear)), (zFar - zNear));
#define M(row,col) m[col*4+row]
M(0,0) = CLUTTER_FIXED_TO_FLOAT (x);
M(1,1) = CLUTTER_FIXED_TO_FLOAT (y);
M(2,2) = CLUTTER_FIXED_TO_FLOAT (c);
M(2,3) = CLUTTER_FIXED_TO_FLOAT (d);
M(3,2) = -1.0F;
GE( glMultMatrixf (m) );
#undef M
}
#endif
void
cogl_setup_viewport (guint w,
guint h,
@ -536,18 +491,11 @@ cogl_setup_viewport (guint w,
gint height = (gint) h;
GE( glViewport (0, 0, width, height) );
#define NEG(x) (1 + ~(x))
GE( glMatrixMode (GL_PROJECTION) );
GE( glLoadIdentity () );
/*
glOrthox (0,
width << 16,
0,
height << 16,
-1 << 16, 1 << 16);
/* For Ortho projection.
* glOrthox (0, width << 16, 0, height << 16, -1 << 16, 1 << 16);
*/
cogl_perspective (fovy, aspect, z_near, z_far);
@ -558,50 +506,14 @@ cogl_setup_viewport (guint w,
/* camera distance from screen, 0.5 * tan (FOV) */
#define DEFAULT_Z_CAMERA 0.866025404f
GE( glTranslatex (-1 << 15,
-1 << 15,
NEG(CLUTTER_FLOAT_TO_FIXED(DEFAULT_Z_CAMERA))) );
-CLUTTER_FLOAT_TO_FIXED(DEFAULT_Z_CAMERA)) );
g_debug ("TX1: %f/%f %f/%f %f/%f",
CLUTTER_FIXED_TO_DOUBLE (-1 << 15), -0.5,
CLUTTER_FIXED_TO_DOUBLE (-1 << 15), -0.5,
CLUTTER_FIXED_TO_DOUBLE (NEG(CLUTTER_FLOAT_TO_FIXED(DEFAULT_Z_CAMERA))),
-DEFAULT_Z_CAMERA);
GE( glScalex ( CFX_ONE / width,
NEG(CFX_ONE) / height,
-CFX_ONE / height,
CFX_ONE / width));
g_debug ("SX: %f/%f %f/%f, w %d, h %d",
CLUTTER_FIXED_TO_DOUBLE (CFX_ONE / width), 1.0f / width,
CLUTTER_FIXED_TO_DOUBLE (NEG(CFX_ONE) / height), -1.0f / height,
width, height);
GE( glTranslatex (0, NEG(CFX_ONE) * height, 0) );
g_debug ("TX2: %f/%f",
CLUTTER_FIXED_TO_DOUBLE (NEG(CFX_ONE) * height),
-1.0 * height);
#if 0
GE( glTranslatex (NEG(CFX_HALF),
NEG(CFX_HALF),
NEG(CLUTTER_FLOAT_TO_FIXED(DEFAULT_Z_CAMERA))) );
GE( glScalex ( CFX_DIV(CFX_ONE, CLUTTER_INT_TO_FIXED(width)),
NEG(CFX_DIV(CFX_ONE, CLUTTER_INT_TO_FIXED(height))),
CFX_DIV(CFX_ONE, CLUTTER_INT_TO_FIXED(width))) );
GE( glTranslatex (0, NEG(CFX_MUL(CFX_ONE, CLUTTER_INT_TO_FIXED(height))), 0) );
#endif
#if 0
GE( glTranslatef (-0.5f, -0.5f, -DEFAULT_Z_CAMERA) );
GE( glScalef ( 1.0f / width,
-1.0f / height,
1.0f / width) );
GE( glTranslatef (0.0f, -1.0 * height, 0.0f) );
#endif
GE( glTranslatex (0, -CFX_ONE * height, 0) );
}