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/*
* Cogl
*
* A Low Level GPU Graphics and Utilities API
*
* Copyright (C) 2007,2008,2009,2010 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*
*/
#include "cogl-config.h"
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include "cogl-i18n-private.h"
#include "cogl-debug.h"
#include "cogl-util.h"
#include "cogl-context-private.h"
#include "cogl-pipeline-private.h"
#include "cogl-framebuffer-private.h"
#include "cogl-matrix-private.h"
#include "cogl-journal-private.h"
#include "cogl-bitmap-private.h"
#include "cogl-texture-private.h"
#include "cogl-texture-driver.h"
#include "cogl-attribute-private.h"
#include "cogl-framebuffer-private.h"
#include "cogl-renderer-private.h"
#include "cogl-private.h"
#include "cogl1-context.h"
#include "cogl-offscreen.h"
#include "winsys/cogl-winsys-private.h"
GCallback
cogl_get_proc_address (const char* name)
{
_COGL_GET_CONTEXT (ctx, NULL);
return _cogl_renderer_get_proc_address (ctx->display->renderer, name, FALSE);
}
gboolean
_cogl_check_extension (const char *name, char * const *ext)
{
while (*ext)
if (!strcmp (name, *ext))
return TRUE;
else
ext++;
return FALSE;
}
/* XXX: This API has been deprecated */
void
cogl_set_depth_test_enabled (gboolean setting)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (ctx->legacy_depth_test_enabled == setting)
return;
ctx->legacy_depth_test_enabled = setting;
}
/* XXX: This API has been deprecated */
gboolean
cogl_get_depth_test_enabled (void)
{
_COGL_GET_CONTEXT (ctx, FALSE);
return ctx->legacy_depth_test_enabled;
}
void
cogl_set_backface_culling_enabled (gboolean setting)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (ctx->legacy_backface_culling_enabled == setting)
return;
ctx->legacy_backface_culling_enabled = setting;
}
gboolean
cogl_get_backface_culling_enabled (void)
{
_COGL_GET_CONTEXT (ctx, FALSE);
return ctx->legacy_backface_culling_enabled;
}
gboolean
cogl_has_feature (CoglContext *ctx, CoglFeatureID feature)
{
return COGL_FLAGS_GET (ctx->features, feature);
}
gboolean
cogl_has_features (CoglContext *ctx, ...)
{
va_list args;
CoglFeatureID feature;
va_start (args, ctx);
while ((feature = va_arg (args, CoglFeatureID)))
if (!cogl_has_feature (ctx, feature))
return FALSE;
va_end (args);
return TRUE;
}
void
cogl_foreach_feature (CoglContext *ctx,
CoglFeatureCallback callback,
void *user_data)
{
int i;
for (i = 0; i < _COGL_N_FEATURE_IDS; i++)
if (COGL_FLAGS_GET (ctx->features, i))
callback (i, user_data);
}
void
cogl_flush (void)
{
GList *l;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
for (l = ctx->framebuffers; l; l = l->next)
_cogl_framebuffer_flush_journal (l->data);
}
uint32_t
_cogl_driver_error_quark (void)
{
return g_quark_from_static_string ("cogl-driver-error-quark");
}
/* Scale from OpenGL normalized device coordinates (ranging from -1 to 1)
* to Cogl window/framebuffer coordinates (ranging from 0 to buffer-size) with
* (0,0) being top left. */
#define VIEWPORT_TRANSFORM_X(x, vp_origin_x, vp_width) \
( ( ((x) + 1.0) * ((vp_width) / 2.0) ) + (vp_origin_x) )
/* Note: for Y we first flip all coordinates around the X axis while in
* normalized device coodinates */
#define VIEWPORT_TRANSFORM_Y(y, vp_origin_y, vp_height) \
( ( ((-(y)) + 1.0) * ((vp_height) / 2.0) ) + (vp_origin_y) )
/* Transform a homogeneous vertex position from model space to Cogl
* window coordinates (with 0,0 being top left) */
void
_cogl_transform_point (const CoglMatrix *matrix_mv,
const CoglMatrix *matrix_p,
const float *viewport,
float *x,
float *y)
{
float z = 0;
float w = 1;
/* Apply the modelview matrix transform */
cogl_matrix_transform_point (matrix_mv, x, y, &z, &w);
/* Apply the projection matrix transform */
cogl_matrix_transform_point (matrix_p, x, y, &z, &w);
/* Perform perspective division */
*x /= w;
*y /= w;
/* Apply viewport transform */
*x = VIEWPORT_TRANSFORM_X (*x, viewport[0], viewport[2]);
*y = VIEWPORT_TRANSFORM_Y (*y, viewport[1], viewport[3]);
}
#undef VIEWPORT_TRANSFORM_X
#undef VIEWPORT_TRANSFORM_Y
uint32_t
_cogl_system_error_quark (void)
{
return g_quark_from_static_string ("cogl-system-error-quark");
}
void
_cogl_init (void)
{
static gboolean initialized = FALSE;
if (initialized == FALSE)
{
#if !GLIB_CHECK_VERSION (2, 36, 0)
g_type_init ();
#endif
_cogl_debug_check_environment ();
initialized = TRUE;
}
}
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