115 lines
3.1 KiB
C
115 lines
3.1 KiB
C
|
/**************************************************************************
|
||
|
|
*
|
||
|
|
* Copyright 2019 VMware, Inc.
|
||
|
|
* All Rights Reserved.
|
||
|
|
*
|
||
|
|
* 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, sub license, 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 (including the
|
||
|
|
* next paragraph) 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 NON-INFRINGEMENT.
|
||
|
|
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS 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.
|
||
|
|
*
|
||
|
|
**************************************************************************/
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Miscellantous state tracker utility functions, macros.
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
#ifndef ST_UTIL
|
||
|
|
#define ST_UTIL
|
||
|
|
|
||
|
|
|
||
|
|
#include "state_tracker/st_context.h"
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/** For drawing quads for glClear, glDraw/CopyPixels, glBitmap, etc. */
|
||
|
|
struct st_util_vertex
|
||
|
|
{
|
||
|
|
float x, y, z;
|
||
|
|
float r, g, b, a;
|
||
|
|
float s, t;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/* Invalidate the readpixels cache to ensure we don't read stale data.
|
||
|
|
*/
|
||
|
|
static inline void
|
||
|
|
st_invalidate_readpix_cache(struct st_context *st)
|
||
|
|
{
|
||
|
|
if (unlikely(st->readpix_cache.src)) {
|
||
|
|
pipe_resource_reference(&st->readpix_cache.src, NULL);
|
||
|
|
pipe_resource_reference(&st->readpix_cache.cache, NULL);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#define Y_0_TOP 1
|
||
|
|
#define Y_0_BOTTOM 2
|
||
|
|
|
||
|
|
static inline GLuint
|
||
|
|
st_fb_orientation(const struct gl_framebuffer *fb)
|
||
|
|
{
|
||
|
|
if (fb && _mesa_is_winsys_fbo(fb)) {
|
||
|
|
/* Drawing into a window (on-screen buffer).
|
||
|
|
*
|
||
|
|
* Negate Y scale to flip image vertically.
|
||
|
|
* The NDC Y coords prior to viewport transformation are in the range
|
||
|
|
* [y=-1=bottom, y=1=top]
|
||
|
|
* Hardware window coords are in the range [y=0=top, y=H-1=bottom] where
|
||
|
|
* H is the window height.
|
||
|
|
* Use the viewport transformation to invert Y.
|
||
|
|
*/
|
||
|
|
return Y_0_TOP;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
/* Drawing into user-created FBO (very likely a texture).
|
||
|
|
*
|
||
|
|
* For textures, T=0=Bottom, so by extension Y=0=Bottom for rendering.
|
||
|
|
*/
|
||
|
|
return Y_0_BOTTOM;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static inline bool
|
||
|
|
st_user_clip_planes_enabled(struct gl_context *ctx)
|
||
|
|
{
|
||
|
|
return (ctx->API == API_OPENGL_COMPAT ||
|
||
|
|
ctx->API == API_OPENGLES) && /* only ES 1.x */
|
||
|
|
ctx->Transform.ClipPlanesEnabled;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/** clear-alloc a struct-sized object, with casting */
|
||
|
|
#define ST_CALLOC_STRUCT(T) (struct T *) calloc(1, sizeof(struct T))
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
#endif /* ST_UTIL */
|