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6f79eb8a5a
cogl_read_pixels returns image data in a top-down memory order, but because OpenGL normally returns pixel data in a bottom-up order we have to flip the data before returning it to the user. If the OpenGL driver supports the GL_MESA_pack_invert extension though we can ask the driver to return the data in a top-down order in the first place. Signed-off-by: Neil Roberts <neil@linux.intel.com>
151 lines
4.0 KiB
C
151 lines
4.0 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2007,2008,2009,2010 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#ifndef __COGL_INTERNAL_H
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#define __COGL_INTERNAL_H
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#include "cogl.h"
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#include "cogl-matrix-stack.h"
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#include "cogl-bitmask.h"
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#ifdef COGL_HAS_XLIB_SUPPORT
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#include <X11/Xutil.h>
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#endif
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typedef enum
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{
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COGL_FRONT_WINDING_CLOCKWISE,
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COGL_FRONT_WINDING_COUNTER_CLOCKWISE
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} CoglFrontWinding;
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typedef enum {
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COGL_BOXED_NONE,
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COGL_BOXED_INT,
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COGL_BOXED_FLOAT,
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COGL_BOXED_MATRIX
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} CoglBoxedType;
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typedef struct _CoglBoxedValue
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{
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CoglBoxedType type;
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int size, count;
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gboolean transpose;
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union {
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float float_value[4];
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int int_value[4];
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float matrix[16];
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float *float_array;
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int *int_array;
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void *array;
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} v;
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} CoglBoxedValue;
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#ifdef COGL_GL_DEBUG
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const char *
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cogl_gl_error_to_string (GLenum error_code);
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#define GE(ctx, x) G_STMT_START { \
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GLenum __err; \
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(ctx)->x; \
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while ((__err = (ctx)->glGetError ()) != GL_NO_ERROR) \
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{ \
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g_warning ("%s: GL error (%d): %s\n", \
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G_STRLOC, \
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__err, \
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cogl_gl_error_to_string (__err)); \
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} } G_STMT_END
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#define GE_RET(ret, ctx, x) G_STMT_START { \
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GLenum __err; \
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ret = (ctx)->x; \
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while ((__err = (ctx)->glGetError ()) != GL_NO_ERROR) \
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{ \
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g_warning ("%s: GL error (%d): %s\n", \
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G_STRLOC, \
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__err, \
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cogl_gl_error_to_string (__err)); \
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} } G_STMT_END
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#else /* !COGL_GL_DEBUG */
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#define GE(ctx, x) ((ctx)->x)
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#define GE_RET(ret, ctx, x) (ret = ((ctx)->x))
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#endif /* COGL_GL_DEBUG */
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#define COGL_ENABLE_ALPHA_TEST (1<<1)
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#define COGL_ENABLE_VERTEX_ARRAY (1<<2)
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#define COGL_ENABLE_COLOR_ARRAY (1<<3)
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#define COGL_ENABLE_BACKFACE_CULLING (1<<4)
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int
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_cogl_get_format_bpp (CoglPixelFormat format);
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void
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_cogl_enable (unsigned long flags);
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unsigned long
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_cogl_get_enable (void);
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void
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_cogl_flush_face_winding (void);
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void
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_cogl_transform_point (const CoglMatrix *matrix_mv,
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const CoglMatrix *matrix_p,
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const float *viewport,
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float *x,
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float *y);
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#define COGL_DRIVER_ERROR (_cogl_driver_error_quark ())
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typedef enum { /*< prefix=COGL_DRIVER_ERROR >*/
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COGL_DRIVER_ERROR_UNKNOWN_VERSION,
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COGL_DRIVER_ERROR_INVALID_VERSION,
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COGL_DRIVER_ERROR_NO_SUITABLE_DRIVER_FOUND,
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COGL_DRIVER_ERROR_FAILED_TO_LOAD_LIBRARY
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} CoglDriverError;
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typedef enum
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{
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COGL_DRIVER_GL,
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COGL_DRIVER_GLES1,
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COGL_DRIVER_GLES2
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} CoglDriver;
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typedef enum
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{
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COGL_PRIVATE_FEATURE_TEXTURE_2D_FROM_EGL_IMAGE = 1L<<0,
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COGL_PRIVATE_FEATURE_MESA_PACK_INVERT = 1L<<1
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} CoglPrivateFeatureFlags;
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gboolean
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_cogl_check_extension (const char *name, const char *ext);
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GQuark
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_cogl_driver_error_quark (void);
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#endif /* __COGL_INTERNAL_H */
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