mirror of
https://github.com/brl/mutter.git
synced 2024-12-12 14:20:17 +00:00
fda8a1d948
* clutter/clutter-texture.c: (texture_upload_data): Fix a SEGV for GL ES textures. * clutter/cogl/gles/cogl.c: (cogl_setup_viewport): Tweak default z_camera for 60 degrees like GL. * clutter/egl/clutter-backend-egl.c:: * clutter/egl/clutter-stage-egl.c: Fix edpy usage (thanks to Kaj Gronholm).
569 lines
12 KiB
C
569 lines
12 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.
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "cogl.h"
|
|
|
|
#include <GLES/gl.h>
|
|
#include <string.h>
|
|
|
|
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
|
|
#define PIXEL_TYPE GL_UNSIGNED_BYTE
|
|
#else
|
|
#define PIXEL_TYPE GL_UNSIGNED_INT_8_8_8_8_REV
|
|
#endif
|
|
|
|
static gulong __enable_flags = 0;
|
|
|
|
#define COGL_DEBUG 0
|
|
|
|
#if COGL_DEBUG
|
|
struct token_string
|
|
{
|
|
GLuint Token;
|
|
const char *String;
|
|
};
|
|
|
|
static const struct token_string Errors[] = {
|
|
{ GL_NO_ERROR, "no error" },
|
|
{ GL_INVALID_ENUM, "invalid enumerant" },
|
|
{ GL_INVALID_VALUE, "invalid value" },
|
|
{ GL_INVALID_OPERATION, "invalid operation" },
|
|
{ GL_STACK_OVERFLOW, "stack overflow" },
|
|
{ GL_STACK_UNDERFLOW, "stack underflow" },
|
|
{ GL_OUT_OF_MEMORY, "out of memory" },
|
|
#ifdef GL_INVALID_FRAMEBUFFER_OPERATION_EXT
|
|
{ GL_INVALID_FRAMEBUFFER_OPERATION_EXT, "invalid framebuffer operation" },
|
|
#endif
|
|
{ ~0, NULL }
|
|
};
|
|
|
|
static const char*
|
|
error_string(GLenum errorCode)
|
|
{
|
|
int i;
|
|
for (i = 0; Errors[i].String; i++) {
|
|
if (Errors[i].Token == errorCode)
|
|
return Errors[i].String;
|
|
}
|
|
return "unknown";
|
|
}
|
|
#endif
|
|
|
|
#if COGL_DEBUG
|
|
#define GE(x...) { \
|
|
GLenum err; \
|
|
(x); \
|
|
fprintf(stderr, "%s\n", #x); \
|
|
while ((err = glGetError()) != GL_NO_ERROR) { \
|
|
fprintf(stderr, "glError: %s caught at %s:%u\n", \
|
|
(char *)error_string(err), \
|
|
__FILE__, __LINE__); \
|
|
} \
|
|
}
|
|
#else
|
|
#define GE(x) (x);
|
|
#endif
|
|
|
|
CoglFuncPtr
|
|
cogl_get_proc_address (const gchar* name)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
gboolean
|
|
cogl_check_extension (const gchar *name, const gchar *ext)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
void
|
|
cogl_paint_init (const ClutterColor *color)
|
|
{
|
|
#if COGL_DEBUG
|
|
fprintf(stderr, "\n ============== Paint Start ================ \n");
|
|
#endif
|
|
|
|
glClearColorx ((color->red << 16) / 0xff,
|
|
(color->green << 16) / 0xff,
|
|
(color->blue << 16) / 0xff,
|
|
0xff);
|
|
|
|
glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
|
|
glDisable (GL_LIGHTING);
|
|
glDisable (GL_DEPTH_TEST);
|
|
|
|
cogl_enable (CGL_ENABLE_BLEND);
|
|
|
|
glTexEnvx (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
|
|
}
|
|
|
|
/* FIXME: inline most of these */
|
|
void
|
|
cogl_push_matrix (void)
|
|
{
|
|
GE( glPushMatrix() );
|
|
}
|
|
|
|
void
|
|
cogl_pop_matrix (void)
|
|
{
|
|
GE( glPopMatrix() );
|
|
}
|
|
|
|
void
|
|
cogl_scale (ClutterFixed x, ClutterFixed y)
|
|
{
|
|
GE( glScalex (x, y, CFX_ONE) );
|
|
}
|
|
|
|
void
|
|
cogl_translatex (ClutterFixed x, ClutterFixed y, ClutterFixed z)
|
|
{
|
|
GE( glTranslatex (x, y, z) );
|
|
}
|
|
|
|
void
|
|
cogl_translate (gint x, gint y, gint z)
|
|
{
|
|
GE( glTranslatex (CLUTTER_INT_TO_FIXED(x),
|
|
CLUTTER_INT_TO_FIXED(y),
|
|
CLUTTER_INT_TO_FIXED(z)) );
|
|
}
|
|
|
|
void
|
|
cogl_rotatex (ClutterFixed angle,
|
|
ClutterFixed x,
|
|
ClutterFixed y,
|
|
ClutterFixed z)
|
|
{
|
|
GE( glRotatex (angle,x,y,z) );
|
|
}
|
|
|
|
void
|
|
cogl_rotate (gint angle, gint x, gint y, gint z)
|
|
{
|
|
GE( glRotatex (CLUTTER_INT_TO_FIXED(angle),
|
|
CLUTTER_INT_TO_FIXED(x),
|
|
CLUTTER_INT_TO_FIXED(y),
|
|
CLUTTER_INT_TO_FIXED(z)) );
|
|
}
|
|
|
|
void
|
|
cogl_enable (gulong flags)
|
|
{
|
|
/* This function essentially caches glEnable state() in the
|
|
* hope of lessening number GL traffic.
|
|
*/
|
|
if (flags & CGL_ENABLE_BLEND)
|
|
{
|
|
if (!(__enable_flags & CGL_ENABLE_BLEND))
|
|
{
|
|
GE( glEnable (GL_BLEND) );
|
|
GE( glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) );
|
|
}
|
|
__enable_flags |= CGL_ENABLE_BLEND;
|
|
}
|
|
else if (__enable_flags & CGL_ENABLE_BLEND)
|
|
{
|
|
GE( glDisable (GL_BLEND) );
|
|
__enable_flags &= ~CGL_ENABLE_BLEND;
|
|
}
|
|
|
|
if (flags & CGL_ENABLE_TEXTURE_2D)
|
|
{
|
|
if (!(__enable_flags & CGL_ENABLE_TEXTURE_2D))
|
|
GE( glEnable (GL_TEXTURE_2D) );
|
|
__enable_flags |= CGL_ENABLE_TEXTURE_2D;
|
|
}
|
|
else if (__enable_flags & CGL_ENABLE_TEXTURE_2D)
|
|
{
|
|
GE( glDisable (GL_TEXTURE_2D) );
|
|
__enable_flags &= ~CGL_ENABLE_TEXTURE_2D;
|
|
}
|
|
|
|
#if 0
|
|
if (flags & CGL_ENABLE_TEXTURE_RECT)
|
|
{
|
|
if (!(__enable_flags & CGL_ENABLE_TEXTURE_RECT))
|
|
glEnable (GL_TEXTURE_RECTANGLE_ARB);
|
|
|
|
__enable_flags |= CGL_ENABLE_TEXTURE_RECT;
|
|
}
|
|
else if (__enable_flags & CGL_ENABLE_TEXTURE_RECT)
|
|
{
|
|
glDisable (GL_TEXTURE_RECTANGLE_ARB);
|
|
__enable_flags &= ~CGL_ENABLE_TEXTURE_RECT;
|
|
}
|
|
#endif
|
|
|
|
if (flags & CGL_ENABLE_ALPHA_TEST)
|
|
{
|
|
if (!(__enable_flags & CGL_ENABLE_ALPHA_TEST))
|
|
glEnable (GL_ALPHA_TEST);
|
|
|
|
__enable_flags |= CGL_ENABLE_ALPHA_TEST;
|
|
}
|
|
else if (__enable_flags & CGL_ENABLE_ALPHA_TEST)
|
|
{
|
|
glDisable (GL_ALPHA_TEST);
|
|
__enable_flags &= ~CGL_ENABLE_ALPHA_TEST;
|
|
}
|
|
}
|
|
|
|
void
|
|
cogl_color (const ClutterColor *color)
|
|
{
|
|
GE( glColor4x ((color->red << 16) / 0xff,
|
|
(color->green << 16) / 0xff,
|
|
(color->blue << 16) / 0xff,
|
|
(color->alpha << 16) / 0xff) );
|
|
}
|
|
|
|
void
|
|
cogl_clip_set (const ClutterGeometry *clip)
|
|
{
|
|
GE( glEnable (GL_STENCIL_TEST) );
|
|
|
|
GE( glClearStencil (0) );
|
|
GE( glClear (GL_STENCIL_BUFFER_BIT) );
|
|
|
|
GE( glStencilFunc (GL_NEVER, 0x1, 0x1) );
|
|
GE( glStencilOp (GL_INCR, GL_INCR, GL_INCR) );
|
|
|
|
GE( glColor4x (CFX_ONE, CFX_ONE, CFX_ONE, CFX_ONE ) );
|
|
|
|
cogl_rectangle (clip->x, clip->y, clip->width, clip->height);
|
|
|
|
GE( glStencilFunc (GL_EQUAL, 0x1, 0x1) );
|
|
GE( glStencilOp (GL_KEEP, GL_KEEP, GL_KEEP) );
|
|
}
|
|
|
|
void
|
|
cogl_clip_unset (void)
|
|
{
|
|
GE( glDisable (GL_STENCIL_TEST) );
|
|
}
|
|
|
|
gboolean
|
|
cogl_texture_can_size (COGLenum target,
|
|
COGLenum pixel_format,
|
|
COGLenum pixel_type,
|
|
int width,
|
|
int height)
|
|
{
|
|
/* FIXME: How we get this is likely GLES implementation dependant. */
|
|
return TRUE;
|
|
}
|
|
|
|
void
|
|
cogl_texture_quad (gint x1,
|
|
gint x2,
|
|
gint y1,
|
|
gint y2,
|
|
ClutterFixed tx1,
|
|
ClutterFixed ty1,
|
|
ClutterFixed tx2,
|
|
ClutterFixed ty2)
|
|
{
|
|
#define FIX CLUTTER_INT_TO_FIXED
|
|
|
|
GLfixed quadVerts[] = {
|
|
FIX(x1), FIX(y1), 0,
|
|
FIX(x2), FIX(y1), 0,
|
|
FIX(x2), FIX(y2), 0,
|
|
FIX(x2), FIX(y2), 0,
|
|
FIX(x1), FIX(y2), 0,
|
|
FIX(x1), FIX(y1), 0
|
|
};
|
|
|
|
GLfixed quadTex[] = {
|
|
tx1, ty1,
|
|
tx2, ty1,
|
|
tx2, ty2,
|
|
tx2, ty2,
|
|
tx1, ty2,
|
|
tx1, ty1
|
|
};
|
|
|
|
#undef FIX
|
|
|
|
GE( glEnableClientState(GL_VERTEX_ARRAY) );
|
|
GE( glEnableClientState(GL_TEXTURE_COORD_ARRAY) );
|
|
GE( glVertexPointer(3, GL_FIXED, 0, quadVerts) );
|
|
GE( glTexCoordPointer(2, GL_FIXED, 0, quadTex) );
|
|
GE( glDrawArrays(GL_TRIANGLES, 0, 6) );
|
|
GE( glDisableClientState(GL_TEXTURE_COORD_ARRAY) );
|
|
GE( glDisableClientState(GL_VERTEX_ARRAY) );
|
|
}
|
|
|
|
void
|
|
cogl_textures_create (guint num, guint *textures)
|
|
{
|
|
GE( glGenTextures (num, textures) );
|
|
}
|
|
|
|
void
|
|
cogl_textures_destroy (guint num, const guint *textures)
|
|
{
|
|
GE( glDeleteTextures (num, textures) );
|
|
}
|
|
|
|
void
|
|
cogl_texture_bind (COGLenum target, guint texture)
|
|
{
|
|
GE( glBindTexture (target, texture) );
|
|
}
|
|
|
|
void
|
|
cogl_texture_set_alignment (COGLenum target,
|
|
guint alignment,
|
|
guint row_length)
|
|
{
|
|
/* GE( glPixelStorei (GL_UNPACK_ROW_LENGTH, row_length) ); */
|
|
GE( glPixelStorei (GL_UNPACK_ALIGNMENT, alignment) );
|
|
}
|
|
|
|
void
|
|
cogl_texture_set_filters (COGLenum target,
|
|
COGLenum min_filter,
|
|
COGLenum max_filter)
|
|
{
|
|
GE( glTexParameteri(target, GL_TEXTURE_MAG_FILTER, max_filter) );
|
|
GE( glTexParameteri(target, GL_TEXTURE_MIN_FILTER, min_filter) );
|
|
}
|
|
|
|
void
|
|
cogl_texture_set_wrap (COGLenum target,
|
|
COGLenum wrap_s,
|
|
COGLenum wrap_t)
|
|
{
|
|
GE( glTexParameteri(target, GL_TEXTURE_WRAP_S, wrap_s) );
|
|
GE( glTexParameteri(target, GL_TEXTURE_WRAP_T, wrap_s) );
|
|
}
|
|
|
|
void
|
|
cogl_texture_image_2d (COGLenum target,
|
|
COGLint internal_format,
|
|
gint width,
|
|
gint height,
|
|
COGLenum format,
|
|
COGLenum type,
|
|
const guchar* pixels)
|
|
{
|
|
GE( glTexImage2D (target,
|
|
0, /* No mipmap support as yet */
|
|
internal_format,
|
|
width,
|
|
height,
|
|
0, /* 0 pixel border */
|
|
format,
|
|
type,
|
|
pixels) );
|
|
}
|
|
|
|
void
|
|
cogl_texture_sub_image_2d (COGLenum target,
|
|
gint xoff,
|
|
gint yoff,
|
|
gint width,
|
|
gint height,
|
|
COGLenum format,
|
|
COGLenum type,
|
|
const guchar* pixels)
|
|
{
|
|
GE( glTexSubImage2D (target,
|
|
0,
|
|
xoff,
|
|
yoff,
|
|
width,
|
|
height,
|
|
format,
|
|
type,
|
|
pixels));
|
|
}
|
|
|
|
void
|
|
cogl_rectangle (gint x, gint y, guint width, guint height)
|
|
{
|
|
#define FIX CLUTTER_INT_TO_FIXED
|
|
|
|
GLfixed rect_verts[] = {
|
|
FIX(x), FIX(y),
|
|
FIX((x + width)), FIX(y),
|
|
FIX(x), FIX((y + height)),
|
|
FIX((x + width)), FIX((y + height)),
|
|
};
|
|
|
|
#undef FIX
|
|
|
|
GE( glEnableClientState(GL_VERTEX_ARRAY) );
|
|
GE( glVertexPointer(2, GL_FIXED, 0, rect_verts) );
|
|
GE( glDrawArrays(GL_TRIANGLE_STRIP, 0, 4) );
|
|
GE( glDisableClientState(GL_VERTEX_ARRAY) );
|
|
}
|
|
|
|
/* FIXME: Should use ClutterReal or Fixed */
|
|
void
|
|
cogl_trapezoid (gint y1,
|
|
gint x11,
|
|
gint x21,
|
|
gint y2,
|
|
gint x12,
|
|
gint x22)
|
|
{
|
|
/* FIXME */
|
|
}
|
|
|
|
|
|
void
|
|
cogl_alpha_func (COGLenum func,
|
|
ClutterFixed ref)
|
|
{
|
|
GE( glAlphaFunc (func, CLUTTER_FIXED_TO_FLOAT(ref)) );
|
|
}
|
|
|
|
/*
|
|
* Fixed point implementation of the perspective function
|
|
*/
|
|
void
|
|
cogl_perspective (ClutterFixed fovy,
|
|
ClutterFixed aspect,
|
|
ClutterFixed zNear,
|
|
ClutterFixed zFar)
|
|
{
|
|
ClutterFixed xmax, ymax;
|
|
ClutterFixed x, y, c, d;
|
|
ClutterFixed fovy_rad_half = CFX_MUL (fovy, CFX_PI) / 360;
|
|
|
|
GLfixed 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, CFX_DIV (clutter_sinx (fovy_rad_half),
|
|
clutter_cosx (fovy_rad_half)));
|
|
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) = x;
|
|
M(1,1) = y;
|
|
M(2,2) = c;
|
|
M(2,3) = d;
|
|
M(3,2) = 1 + ~CFX_ONE;
|
|
|
|
GE( glMultMatrixx (m) );
|
|
#undef M
|
|
}
|
|
|
|
void
|
|
cogl_setup_viewport (guint w,
|
|
guint h,
|
|
ClutterFixed fovy,
|
|
ClutterFixed aspect,
|
|
ClutterFixed z_near,
|
|
ClutterFixed z_far)
|
|
{
|
|
gint width = (gint) w;
|
|
gint height = (gint) h;
|
|
ClutterFixed z_camera;
|
|
|
|
GE( glViewport (0, 0, width, height) );
|
|
GE( glMatrixMode (GL_PROJECTION) );
|
|
GE( glLoadIdentity () );
|
|
|
|
/* For Ortho projection.
|
|
* glOrthox (0, width << 16, 0, height << 16, -1 << 16, 1 << 16);
|
|
*/
|
|
|
|
cogl_perspective (fovy, aspect, z_near, z_far);
|
|
|
|
GE( glMatrixMode (GL_MODELVIEW) );
|
|
GE( glLoadIdentity () );
|
|
|
|
/*
|
|
* camera distance from screen, 0.5 * tan (FOV)
|
|
*
|
|
* See comments in ../gl/cogl.c
|
|
*/
|
|
#define DEFAULT_Z_CAMERA 0.869f
|
|
z_camera = CLUTTER_FLOAT_TO_FIXED (DEFAULT_Z_CAMERA);
|
|
|
|
if (fovy != CFX_60)
|
|
{
|
|
ClutterFixed fovy_rad = CFX_MUL (fovy, CFX_PI) / 180;
|
|
|
|
z_camera = CFX_DIV (clutter_sinx (fovy_rad),
|
|
clutter_cosx (fovy_rad)) >> 1;
|
|
}
|
|
|
|
|
|
GE( glTranslatex (-1 << 15, -1 << 15, -z_camera));
|
|
|
|
GE( glScalex ( CFX_ONE / width,
|
|
-CFX_ONE / height,
|
|
CFX_ONE / width));
|
|
|
|
GE( glTranslatex (0, -CFX_ONE * height, 0) );
|
|
}
|
|
|
|
ClutterFeatureFlags
|
|
cogl_get_features ()
|
|
{
|
|
/* Suck */
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
cogl_get_modelview_matrix (ClutterFixed m[16])
|
|
{
|
|
glGetFixedv(GL_MODELVIEW_MATRIX, &m[0]);
|
|
}
|
|
|
|
void
|
|
cogl_get_projection_matrix (ClutterFixed m[16])
|
|
{
|
|
glGetFixedv(GL_PROJECTION_MATRIX, &m[0]);
|
|
}
|
|
|
|
void
|
|
cogl_get_viewport (ClutterFixed v[4])
|
|
{
|
|
glGetFixedv(GL_VIEWPORT, &v[0]);
|
|
}
|