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Add a new function, driFillInModes, that is to be used by drivers to

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create the set of support __GLcontextModes.  This should replace the
current driver-specific fill_in_modes functions.
This commit is contained in:
Ian Romanick
2004-06-03 18:57:18 +00:00
parent 173bc32195
commit 7439605697
2 changed files with 244 additions and 2 deletions
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238
src/mesa/drivers/dri/common/utils.c
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@@ -1,5 +1,5 @@
/* /*
* (c) Copyright IBM Corporation 2002 * (C) Copyright IBM Corporation 2002, 2004
* All Rights Reserved. * All Rights Reserved.
* *
* Permission is hereby granted, free of charge, to any person obtaining a * Permission is hereby granted, free of charge, to any person obtaining a
@@ -297,3 +297,239 @@ GLboolean driClipRectToFramebuffer( const GLframebuffer *buffer,
return GL_TRUE; return GL_TRUE;
} }
/**
* Creates a set of \c __GLcontextModes that a driver will expose.
*
* A set of \c __GLcontextModes will be created based on the supplied
* parameters. The number of modes processed will be 2 *
* \c num_depth_stencil_bits * \c num_db_modes.
*
* For the most part, data is just copied from \c depth_bits, \c stencil_bits,
* \c db_modes, and \c visType into each \c __GLcontextModes element.
* However, the meanings of \c fb_format and \c fb_type require further
* explanation. The \c fb_format specifies which color components are in
* each pixel and what the default order is. For example, \c GL_RGB specifies
* that red, green, blue are available and red is in the "most significant"
* position and blue is in the "least significant". The \c fb_type specifies
* the bit sizes of each component and the actual ordering. For example, if
* \c GL_UNSIGNED_SHORT_5_6_5_REV is specified with \c GL_RGB, bits [15:11]
* are the blue value, bits [10:5] are the green value, and bits [4:0] are
* the red value.
*
* One sublte issue is the combination of \c GL_RGB or \c GL_BGR and either
* of the \c GL_UNSIGNED_INT_8_8_8_8 modes. The resulting mask values in the
* \c __GLcontextModes structure is \b identical to the \c GL_RGBA or
* \c GL_BGRA case, except the \c alphaMask is zero. This means that, as
* far as this routine is concerned, \c GL_RGB with \c GL_UNSIGNED_INT_8_8_8_8
* still uses 32-bits.
*
* If in doubt, look at the tables used in the function.
*
* \param ptr_to_modes Pointer to a pointer to a linked list of
* \c __GLcontextModes. Upon completion, a pointer to
* the next element to be process will be stored here.
* If the function fails and returns \c GL_FALSE, this
* value will be unmodified, but some elements in the
* linked list may be modified.
* \param fb_format Format of the framebuffer. Currently only \c GL_RGB,
* \c GL_RGBA, \c GL_BGR, and \c GL_BGRA are supported.
* \param fb_type Type of the pixels in the framebuffer. Currently only
* \c GL_UNSIGNED_SHORT_5_6_5,
* \c GL_UNSIGNED_SHORT_5_6_5_REV,
* \c GL_UNSIGNED_INT_8_8_8_8, and
* \c GL_UNSIGNED_INT_8_8_8_8_REV are supported.
* \param depth_bits Array of depth buffer sizes to be exposed.
* \param stencil_bits Array of stencil buffer sizes to be exposed.
* \param num_depth_stencil_bits Number of entries in both \c depth_bits and
* \c stencil_bits.
* \param db_modes Array of buffer swap modes. If an element has a
* value of \c GLX_NONE, then it represents a
* single-buffered mode. Other valid values are
* \c GLX_SWAP_EXCHANGE_OML, \c GLX_SWAP_COPY_OML, and
* \c GLX_SWAP_UNDEFINED_OML. See the
* GLX_OML_swap_method extension spec for more details.
* \param num_db_modes Number of entries in \c db_modes.
* \param visType GLX visual type. Usually either \c GLX_TRUE_COLOR or
* \c GLX_DIRECT_COLOR.
*
* \returns
* \c GL_TRUE on success or \c GL_FALSE on failure. Currently the only
* cause of failure is a bad parameter (i.e., unsupported \c fb_format or
* \c fb_type).
*
* \todo
* There is currently no way to support packed RGB modes (i.e., modes with
* exactly 3 bytes per pixel) or floating-point modes. This could probably
* be done by creating some new, private enums with clever names likes
* \c GL_UNSIGNED_3BYTE_8_8_8, \c GL_4FLOAT_32_32_32_32,
* \c GL_4HALF_16_16_16_16, etc. We can cross that bridge when we come to it.
*/
GLboolean
driFillInModes( __GLcontextModes ** ptr_to_modes,
GLenum fb_format, GLenum fb_type,
const uint8_t * depth_bits, const uint8_t * stencil_bits,
unsigned num_depth_stencil_bits,
const GLenum * db_modes, unsigned num_db_modes,
int visType )
{
static const uint8_t bits_table[3][4] = {
/* R G B A */
{ 5, 6, 5, 0 }, /* Any GL_UNSIGNED_SHORT_5_6_5 */
{ 8, 8, 8, 0 }, /* Any RGB with any GL_UNSIGNED_INT_8_8_8_8 */
{ 8, 8, 8, 8 } /* Any RGBA with any GL_UNSIGNED_INT_8_8_8_8 */
};
/* The following arrays are all indexed by the fb_type masked with 0x07.
* Given the four supported fb_type values, this results in valid array
* indices of 3, 4, 5, and 7.
*/
static const uint32_t masks_table_rgb[8][4] = {
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x000000F8, 0x000007E0, 0x0000001F, 0x00000000 }, /* 5_6_5 */
{ 0x0000001F, 0x000007E0, 0x0000F800, 0x00000000 }, /* 5_6_5_REV */
{ 0xFF000000, 0x00FF0000, 0x0000FF00, 0x00000000 }, /* 8_8_8_8 */
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x000000FF, 0x0000FF00, 0x00FF0000, 0x00000000 } /* 8_8_8_8_REV */
};
static const uint32_t masks_table_rgba[8][4] = {
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x000000F8, 0x000007E0, 0x0000001F, 0x00000000 }, /* 5_6_5 */
{ 0x0000001F, 0x000007E0, 0x0000F800, 0x00000000 }, /* 5_6_5_REV */
{ 0xFF000000, 0x00FF0000, 0x0000FF00, 0x000000FF }, /* 8_8_8_8 */
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000 }, /* 8_8_8_8_REV */
};
static const uint32_t masks_table_bgr[8][4] = {
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x0000001F, 0x000007E0, 0x0000F800, 0x00000000 }, /* 5_6_5 */
{ 0x000000F8, 0x000007E0, 0x0000001F, 0x00000000 }, /* 5_6_5_REV */
{ 0x0000FF00, 0x00FF0000, 0xFF000000, 0x00000000 }, /* 8_8_8_8 */
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x00FF0000, 0x0000FF00, 0x000000FF, 0x00000000 }, /* 8_8_8_8_REV */
};
static const uint32_t masks_table_bgra[8][4] = {
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x0000001F, 0x000007E0, 0x0000F800, 0x00000000 }, /* 5_6_5 */
{ 0x000000F8, 0x000007E0, 0x0000001F, 0x00000000 }, /* 5_6_5_REV */
{ 0x0000FF00, 0x00FF0000, 0xFF000000, 0x000000FF }, /* 8_8_8_8 */
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000 }, /* 8_8_8_8_REV */
};
static const uint8_t bytes_per_pixel[8] = {
0, 0, 0, 2, 2, 4, 0, 4
};
const uint8_t * bits;
const uint32_t * masks;
const int index = fb_type & 0x07;
__GLcontextModes * modes = *ptr_to_modes;
unsigned i;
unsigned j;
unsigned k;
if ( bytes_per_pixel[ index ] == 0 ) {
fprintf( stderr, "[%s:%u] Framebuffer type 0x%04x has 0 bytes per pixel.\n",
__func__, __LINE__, fb_type );
return GL_FALSE;
}
/* Valid types are GL_UNSIGNED_SHORT_5_6_5 and GL_UNSIGNED_INT_8_8_8_8 and
* the _REV versions.
*
* Valid formats are GL_RGBA, GL_RGB, and GL_BGRA.
*/
switch ( fb_format ) {
case GL_RGB:
bits = (bytes_per_pixel[ index ] == 2)
? bits_table[0] : bits_table[1];
masks = masks_table_rgb[ index ];
break;
case GL_RGBA:
bits = (bytes_per_pixel[ index ] == 2)
? bits_table[0] : bits_table[2];
masks = masks_table_rgba[ index ];
break;
case GL_BGR:
bits = (bytes_per_pixel[ index ] == 2)
? bits_table[0] : bits_table[1];
masks = masks_table_bgr[ index ];
break;
case GL_BGRA:
bits = (bytes_per_pixel[ index ] == 2)
? bits_table[0] : bits_table[2];
masks = masks_table_bgra[ index ];
break;
default:
fprintf( stderr, "[%s:%u] Framebuffer format 0x%04x is not GL_RGB, GL_RGBA, GL_BGR, or GL_BGRA.\n",
__func__, __LINE__, fb_format );
return GL_FALSE;
}
for ( k = 0 ; k < num_depth_stencil_bits ; k++ ) {
for ( i = 0 ; i < num_db_modes ; i++ ) {
for ( j = 0 ; j < 2 ; j++ ) {
modes->redBits = bits[0];
modes->greenBits = bits[1];
modes->blueBits = bits[2];
modes->alphaBits = bits[3];
modes->redMask = masks[0];
modes->greenMask = masks[1];
modes->blueMask = masks[2];
modes->alphaMask = masks[3];
modes->rgbBits = modes->redBits + modes->greenBits
+ modes->blueBits + modes->alphaBits;
modes->accumRedBits = 16 * j;
modes->accumGreenBits = 16 * j;
modes->accumBlueBits = 16 * j;
modes->accumAlphaBits = (masks[3] != 0) ? 16 * j : 0;
modes->visualRating = (j == 0) ? GLX_NONE : GLX_SLOW_CONFIG;
modes->stencilBits = stencil_bits[k];
modes->depthBits = depth_bits[k];
modes->visualType = visType;
modes->renderType = GLX_RGBA_BIT;
modes->drawableType = GLX_WINDOW_BIT;
modes->rgbMode = GL_TRUE;
if ( db_modes[i] == GLX_NONE ) {
modes->doubleBufferMode = GL_FALSE;
}
else {
modes->doubleBufferMode = GL_TRUE;
modes->swapMethod = db_modes[i];
}
modes = modes->next;
}
}
}
*ptr_to_modes = modes;
return GL_TRUE;
}

8
src/mesa/drivers/dri/common/utils.h
View File

@@ -1,5 +1,5 @@
/* /*
* (c) Copyright IBM Corporation 2002 * (C) Copyright IBM Corporation 2002, 2004
* All Rights Reserved. * All Rights Reserved.
* *
* Permission is hereby granted, free of charge, to any person obtaining a * Permission is hereby granted, free of charge, to any person obtaining a
@@ -62,4 +62,10 @@ extern GLboolean driClipRectToFramebuffer( const GLframebuffer *buffer,
GLint *x, GLint *y, GLint *x, GLint *y,
GLsizei *width, GLsizei *height ); GLsizei *width, GLsizei *height );
extern GLboolean driFillInModes( __GLcontextModes ** modes,
GLenum fb_format, GLenum fb_type,
const uint8_t * depth_bits, const uint8_t * stencil_bits,
unsigned num_depth_stencil_bits,
const GLenum * db_modes, unsigned num_db_modes, int visType );
#endif /* DRI_DEBUG_H */ #endif /* DRI_DEBUG_H */