34658ea057
This adds a table of driver descriptions to cogl-renderer.c in order of preference and when choosing what driver to use we now iterate the table instead of repeating boilerplate checks. For handling the "default driver" that can be specified when building cogl and handling driver overrides there is a foreach_driver_description() that will make sure to iterate the default driver first or if an override has been set then nothing but the override will be considered. This patch introduces some driver flags that let us broadly categorize what kind of GL driver we are currently running on. Since there are numerous OpenGL apis with different broad feature sets and new apis may be introduced in the future by Khronos then we should tend to avoid using the driver id to do runtime feature checking. These flags provide a more stable quantity for broad feature checks. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit e07d0fc7441dddc3f0a2bc33a6a37d62ddc3efc0)
157 lines
5.4 KiB
C
157 lines
5.4 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) 2010,2013 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_PRIVATE_H__
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#define __COGL_PRIVATE_H__
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#include <cogl/cogl-pipeline.h>
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#include "cogl-context.h"
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COGL_BEGIN_DECLS
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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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COGL_PRIVATE_FEATURE_OFFSCREEN_BLIT = 1L<<2,
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COGL_PRIVATE_FEATURE_FOUR_CLIP_PLANES = 1L<<3,
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COGL_PRIVATE_FEATURE_PBOS = 1L<<4,
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COGL_PRIVATE_FEATURE_VBOS = 1L<<5,
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COGL_PRIVATE_FEATURE_EXT_PACKED_DEPTH_STENCIL = 1L<<6,
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COGL_PRIVATE_FEATURE_OES_PACKED_DEPTH_STENCIL = 1L<<7,
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COGL_PRIVATE_FEATURE_TEXTURE_FORMAT_BGRA8888 = 1L<<8,
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COGL_PRIVATE_FEATURE_UNPACK_SUBIMAGE = 1L<<9,
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COGL_PRIVATE_FEATURE_SAMPLER_OBJECTS = 1L<<10,
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COGL_PRIVATE_FEATURE_READ_PIXELS_ANY_FORMAT = 1L<<11,
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COGL_PRIVATE_FEATURE_ALPHA_TEST = 1L<<12,
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COGL_PRIVATE_FEATURE_FORMAT_CONVERSION = 1L<<13,
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COGL_PRIVATE_FEATURE_QUADS = 1L<<14,
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COGL_PRIVATE_FEATURE_BLEND_CONSTANT = 1L<<15,
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COGL_PRIVATE_FEATURE_QUERY_FRAMEBUFFER_BITS = 1L<<16,
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COGL_PRIVATE_FEATURE_BUILTIN_POINT_SIZE_UNIFORM = 1L<<17,
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COGL_PRIVATE_FEATURE_QUERY_TEXTURE_PARAMETERS = 1L<<18,
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COGL_PRIVATE_FEATURE_ALPHA_TEXTURES = 1L<<19,
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COGL_PRIVATE_FEATURE_TEXTURE_SWIZZLE = 1L<<20,
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COGL_PRIVATE_FEATURE_TEXTURE_MAX_LEVEL = 1L<<21,
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COGL_PRIVATE_FEATURE_ARBFP = 1L<<22,
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COGL_PRIVATE_FEATURE_OES_EGL_SYNC = 1L<<23,
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/* If this is set then the winsys is responsible for queueing dirty
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* events. Otherwise a dirty event will be queued when the onscreen
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* is first allocated or when it is shown or resized */
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COGL_PRIVATE_FEATURE_DIRTY_EVENTS = 1L<<24,
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COGL_PRIVATE_FEATURE_ENABLE_PROGRAM_POINT_SIZE = 1L<<25,
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/* These features let us avoid conditioning code based on the exact
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* driver being used and instead check for broad opengl feature
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* sets that can be shared by several GL apis */
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COGL_PRIVATE_FEATURE_ANY_GL = 1L<<26,
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COGL_PRIVATE_FEATURE_GL_FIXED = 1L<<27,
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COGL_PRIVATE_FEATURE_GL_PROGRAMMABLE = 1L<<28,
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COGL_PRIVATE_FEATURE_GL_EMBEDDED = 1L<<29
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} CoglPrivateFeatureFlags;
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/* Sometimes when evaluating pipelines, either during comparisons or
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* if calculating a hash value we need to tweak the evaluation
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* semantics */
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typedef enum _CoglPipelineEvalFlags
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{
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COGL_PIPELINE_EVAL_FLAG_NONE = 0
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} CoglPipelineEvalFlags;
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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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CoglBool
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_cogl_check_extension (const char *name, char * const *ext);
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void
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_cogl_clear (const CoglColor *color, unsigned long buffers);
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void
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_cogl_init (void);
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void
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_cogl_push_source (CoglPipeline *pipeline, CoglBool enable_legacy);
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CoglBool
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_cogl_get_enable_legacy_state (void);
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/*
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* _cogl_pixel_format_get_bytes_per_pixel:
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* @format: a #CoglPixelFormat
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*
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* Queries how many bytes a pixel of the given @format takes.
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*
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* Return value: The number of bytes taken for a pixel of the given
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* @format.
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*/
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int
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_cogl_pixel_format_get_bytes_per_pixel (CoglPixelFormat format);
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/*
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* _cogl_pixel_format_has_aligned_components:
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* @format: a #CoglPixelFormat
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*
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* Queries whether the ordering of the components for the given
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* @format depend on the endianness of the host CPU or if the
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* components can be accessed using bit shifting and bitmasking by
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* loading a whole pixel into a word.
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*
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* XXX: If we ever consider making something like this public we
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* should really try to think of a better name and come up with
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* much clearer documentation since it really depends on what
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* point of view you consider this from whether a format like
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* COGL_PIXEL_FORMAT_RGBA_8888 is endian dependent. E.g. If you
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* read an RGBA_8888 pixel into a uint32
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* it's endian dependent how you mask out the different channels.
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* But If you already have separate color components and you want
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* to write them to an RGBA_8888 pixel then the bytes can be
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* written sequentially regardless of the endianness.
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*
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* Return value: %TRUE if you need to consider the host CPU
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* endianness when dealing with the given @format
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* else %FALSE.
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*/
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CoglBool
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_cogl_pixel_format_is_endian_dependant (CoglPixelFormat format);
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/*
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* COGL_PIXEL_FORMAT_CAN_HAVE_PREMULT(format):
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* @format: a #CoglPixelFormat
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*
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* Returns TRUE if the pixel format can take a premult bit. This is
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* currently true for all formats that have an alpha channel except
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* COGL_PIXEL_FORMAT_A_8 (because that doesn't have any other
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* components to multiply by the alpha).
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*/
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#define COGL_PIXEL_FORMAT_CAN_HAVE_PREMULT(format) \
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(((format) & COGL_A_BIT) && (format) != COGL_PIXEL_FORMAT_A_8)
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COGL_END_DECLS
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#endif /* __COGL_PRIVATE_H__ */
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