/*
* (C) Copyright IBM Corporation 2002, 2004
* 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
* on 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
* VA LINUX SYSTEM, IBM AND/OR THEIR 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.
*/
/**
* \file utils.c
* Utility functions for DRI drivers.
*
* \author Ian Romanick <idr@us.ibm.com>
*/
#include <string.h>
#include <stdlib.h>
#include "mtypes.h"
#include "extensions.h"
#include "utils.h"
#include "dispatch.h"
int driDispatchRemapTable[ driDispatchRemapTable_size ];
#if defined(USE_X86_ASM)
#include "x86/common_x86_asm.h"
#endif
#if defined(USE_PPC_ASM)
#include "ppc/common_ppc_features.h"
#endif
unsigned
driParseDebugString( const char * debug,
const struct dri_debug_control * control )
{
unsigned flag;
flag = 0;
if ( debug != NULL ) {
while( control->string != NULL ) {
if ( !strcmp( debug, "all" ) ||
strstr( debug, control->string ) != NULL ) {
flag |= control->flag;
}
control++;
}
}
return flag;
}
/**
* Create the \c GL_RENDERER string for DRI drivers.
*
* Almost all DRI drivers use a \c GL_RENDERER string of the form:
*
* "Mesa DRI <chip> <driver date> <AGP speed) <CPU information>"
*
* Using the supplied chip name, driver data, and AGP speed, this function
* creates the string.
*
* \param buffer Buffer to hold the \c GL_RENDERER string.
* \param hardware_name Name of the hardware.
* \param driver_date Driver date.
* \param agp_mode AGP mode (speed).
*
* \returns
* The length of the string stored in \c buffer. This does \b not include
* the terminating \c NUL character.
*/
unsigned
driGetRendererString( char * buffer, const char * hardware_name,
const char * driver_date, GLuint agp_mode )
{
#define MAX_INFO 4
const char * cpu[MAX_INFO];
unsigned next = 0;
unsigned i;
unsigned offset;
offset = sprintf( buffer, "Mesa DRI %s %s", hardware_name, driver_date );
/* Append any AGP-specific information.
*/
switch ( agp_mode ) {
case 1:
case 2:
case 4:
case 8:
offset += sprintf( & buffer[ offset ], " AGP %ux", agp_mode );
break;
default:
break;
}
/* Append any CPU-specific information.
*/
#ifdef USE_X86_ASM
if ( _mesa_x86_cpu_features ) {
cpu[next] = " x86";
next++;
}
# ifdef USE_MMX_ASM
if ( cpu_has_mmx ) {
cpu[next] = (cpu_has_mmxext) ? "/MMX+" : "/MMX";
next++;
}
# endif
# ifdef USE_3DNOW_ASM
if ( cpu_has_3dnow ) {
cpu[next] = (cpu_has_3dnowext) ? "/3DNow!+" : "/3DNow!";
next++;
}
# endif
# ifdef USE_SSE_ASM
if ( cpu_has_xmm ) {
cpu[next] = (cpu_has_xmm2) ? "/SSE2" : "/SSE";
next++;
}
# endif
#elif defined(USE_SPARC_ASM)
cpu[0] = " SPARC";
next = 1;
#elif defined(USE_PPC_ASM)
if ( _mesa_ppc_cpu_features ) {
cpu[next] = (cpu_has_64) ? " PowerPC 64" : " PowerPC";
next++;
}
# ifdef USE_VMX_ASM
if ( cpu_has_vmx ) {
cpu[next] = "/Altivec";
next++;
}
# endif
if ( ! cpu_has_fpu ) {
cpu[next] = "/No FPU";
next++;
}
#endif
for ( i = 0 ; i < next ; i++ ) {
const size_t len = strlen( cpu[i] );
strncpy( & buffer[ offset ], cpu[i], len );
offset += len;
}
return offset;
}
#define need_GL_ARB_multisample
#define need_GL_ARB_transpose_matrix
#define need_GL_ARB_window_pos
#define need_GL_EXT_compiled_vertex_array
#define need_GL_EXT_polygon_offset
#define need_GL_EXT_texture_object
#define need_GL_EXT_vertex_array
#define need_GL_MESA_window_pos
/* These are needed in *all* drivers because Mesa internally implements
* certain functionality in terms of functions provided by these extensions.
* For example, glBlendFunc is implemented by calling glBlendFuncSeparateEXT.
*/
#define need_GL_EXT_blend_func_separate
#define need_GL_NV_vertex_program
#include "extension_helper.h"
static const struct dri_extension all_mesa_extensions[] = {
{ "GL_ARB_multisample", GL_ARB_multisample_functions },
{ "GL_ARB_transpose_matrix", GL_ARB_transpose_matrix_functions },
{ "GL_ARB_window_pos", GL_ARB_window_pos_functions },
{ "GL_EXT_blend_func_separate", GL_EXT_blend_func_separate_functions },
{ "GL_EXT_compiled_vertex_array", GL_EXT_compiled_vertex_array_functions },
{ "GL_EXT_polygon_offset", GL_EXT_polygon_offset_functions },
{ "GL_EXT_texture_object", GL_EXT_texture_object_functions },
{ "GL_EXT_vertex_array", GL_EXT_vertex_array_functions },
{ "GL_MESA_window_pos", GL_MESA_window_pos_functions },
{ "GL_NV_vertex_program", GL_NV_vertex_program_functions },
{ NULL, NULL }
};
/**
* Enable extensions supported by the driver.
*
* \bug
* ARB_imaging isn't handled properly. In Mesa, enabling ARB_imaging also
* enables all the sub-extensions that are folded into it. This means that
* we need to add entry-points (via \c driInitSingleExtension) for those
* new functions here.
*/
void driInitExtensions( GLcontext * ctx,
const struct dri_extension * extensions_to_enable,
GLboolean enable_imaging )
{
static int first_time = 1;
unsigned i;
if ( first_time ) {
for ( i = 0 ; i < driDispatchRemapTable_size ; i++ ) {
driDispatchRemapTable[i] = -1;
}
first_time = 0;
driInitExtensions( ctx, all_mesa_extensions, GL_FALSE );
}
if ( (ctx != NULL) && enable_imaging ) {
_mesa_enable_imaging_extensions( ctx );
}
for ( i = 0 ; extensions_to_enable[i].name != NULL ; i++ ) {
driInitSingleExtension( ctx, & extensions_to_enable[i] );
}
}
/**
* Enable and add dispatch functions for a single extension
*
* \param ctx Context where extension is to be enabled.
* \param ext Extension that is to be enabled.
*
* \sa driInitExtensions, _mesa_enable_extension, _glapi_add_entrypoint
*
* \todo
* Determine if it would be better to use \c strlen instead of the hardcoded
* for-loops.
*/
void driInitSingleExtension( GLcontext * ctx,
const struct dri_extension * ext )
{
unsigned i;
if ( ext->functions != NULL ) {
for ( i = 0 ; ext->functions[i].strings != NULL ; i++ ) {
const char * functions[16];
const char * parameter_signature;
const char * str = ext->functions[i].strings;
unsigned j;
unsigned offset;
/* Separate the parameter signature from the rest of the string.
* If the parameter signature is empty (i.e., the string starts
* with a NUL character), then the function has a void parameter
* list.
*/
parameter_signature = str;
while ( str[0] != '\0' ) {
str++;
}
str++;
/* Divide the string into the substrings that name each
* entry-point for the function.
*/
for ( j = 0 ; j < 16 ; j++ ) {
if ( str[0] == '\0' ) {
functions[j] = NULL;
break;
}
functions[j] = str;
while ( str[0] != '\0' ) {
str++;
}
str++;
}
/* Add each entry-point to the dispatch table.
*/
offset = _glapi_add_dispatch( functions, parameter_signature );
if (offset == -1) {
fprintf(stderr, "DISPATCH ERROR! _glapi_add_dispatch failed "
"to add %s!\n", functions[0]);
}
else if (ext->functions[i].remap_index != -1) {
driDispatchRemapTable[ ext->functions[i].remap_index ] =
offset;
}
else if (ext->functions[i].offset != offset) {
fprintf(stderr, "DISPATCH ERROR! %s -> %u != %u\n",
functions[0], offset, ext->functions[i].offset);
}
}
}
if ( ctx != NULL ) {
_mesa_enable_extension( ctx, ext->name );
}
}
/**
* Utility function used by drivers to test the verions of other components.
*
* If one of the version requirements is not met, a message is logged using
* \c __driUtilMessage.
*
* \param driver_name Name of the driver. Used in error messages.
* \param driActual Actual DRI version supplied __driCreateNewScreen.
* \param driExpected Minimum DRI version required by the driver.
* \param ddxActual Actual DDX version supplied __driCreateNewScreen.
* \param ddxExpected Minimum DDX minor and range of DDX major version required by the driver.
* \param drmActual Actual DRM version supplied __driCreateNewScreen.
* \param drmExpected Minimum DRM version required by the driver.
*
* \returns \c GL_TRUE if all version requirements are met. Otherwise,
* \c GL_FALSE is returned.
*
* \sa __driCreateNewScreen, driCheckDriDdxDrmVersions2, __driUtilMessage
*
* \todo
* Now that the old \c driCheckDriDdxDrmVersions function is gone, this
* function and \c driCheckDriDdxDrmVersions2 should be renamed.
*/
GLboolean
driCheckDriDdxDrmVersions3(const char * driver_name,
const __DRIversion * driActual,
const __DRIversion * driExpected,
const __DRIversion * ddxActual,
const __DRIutilversion2 * ddxExpected,
const __DRIversion * drmActual,
const __DRIversion * drmExpected)
{
static const char format[] = "%s DRI driver expected %s version %d.%d.x "
"but got version %d.%d.%d\n";
static const char format2[] = "%s DRI driver expected %s version %d-%d.%d.x "
"but got version %d.%d.%d\n";
/* Check the DRI version */
if ( (driActual->major != driExpected->major)
|| (driActual->minor < driExpected->minor) ) {
fprintf(stderr, format, driver_name, "DRI",
driExpected->major, driExpected->minor,
driActual->major, driActual->minor, driActual->patch);
return GL_FALSE;
}
/* Check that the DDX driver version is compatible */
/* for miniglx we pass in -1 so we can ignore the DDX version */
if ( (ddxActual->major != -1) && ((ddxActual->major < ddxExpected->major_min)
|| (ddxActual->major > ddxExpected->major_max)
|| (ddxActual->minor < ddxExpected->minor)) ) {
fprintf(stderr, format2, driver_name, "DDX",
ddxExpected->major_min, ddxExpected->major_max, ddxExpected->minor,
ddxActual->major, ddxActual->minor, ddxActual->patch);
return GL_FALSE;
}
/* Check that the DRM driver version is compatible */
if ( (drmActual->major != drmExpected->major)
|| (drmActual->minor < drmExpected->minor) ) {
fprintf(stderr, format, driver_name, "DRM",
drmExpected->major, drmExpected->minor,
drmActual->major, drmActual->minor, drmActual->patch);
return GL_FALSE;
}
return GL_TRUE;
}
GLboolean
driCheckDriDdxDrmVersions2(const char * driver_name,
const __DRIversion * driActual,
const __DRIversion * driExpected,
const __DRIversion * ddxActual,
const __DRIversion * ddxExpected,
const __DRIversion * drmActual,
const __DRIversion * drmExpected)
{
__DRIutilversion2 ddx_expected;
ddx_expected.major_min = ddxExpected->major;
ddx_expected.major_max = ddxExpected->major;
ddx_expected.minor = ddxExpected->minor;
ddx_expected.patch = ddxExpected->patch;
return driCheckDriDdxDrmVersions3(driver_name, driActual,
driExpected, ddxActual, & ddx_expected,
drmActual, drmExpected);
}
GLint
driIntersectArea( drm_clip_rect_t rect1, drm_clip_rect_t rect2 )
{
if (rect2.x1 > rect1.x1) rect1.x1 = rect2.x1;
if (rect2.x2 < rect1.x2) rect1.x2 = rect2.x2;
if (rect2.y1 > rect1.y1) rect1.y1 = rect2.y1;
if (rect2.y2 < rect1.y2) rect1.y2 = rect2.y2;
if (rect1.x1 > rect1.x2 || rect1.y1 > rect1.y2) return 0;
return (rect1.x2 - rect1.x1) * (rect1.y2 - rect1.y1);
}
GLboolean driClipRectToFramebuffer( const GLframebuffer *buffer,
GLint *x, GLint *y,
GLsizei *width, GLsizei *height )
{
/* left clipping */
if (*x < buffer->_Xmin) {
*width -= (buffer->_Xmin - *x);
*x = buffer->_Xmin;
}
/* right clipping */
if (*x + *width > buffer->_Xmax)
*width -= (*x + *width - buffer->_Xmax - 1);
if (*width <= 0)
return GL_FALSE;
/* bottom clipping */
if (*y < buffer->_Ymin) {
*height -= (buffer->_Ymin - *y);
*y = buffer->_Ymin;
}
/* top clipping */
if (*y + *height > buffer->_Ymax)
*height -= (*y + *height - buffer->_Ymax - 1);
if (*height <= 0)
return GL_FALSE;
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 u_int8_t * depth_bits, const u_int8_t * stencil_bits,
unsigned num_depth_stencil_bits,
const GLenum * db_modes, unsigned num_db_modes,
int visType )
{
static const u_int8_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 u_int32_t masks_table_rgb[8][4] = {
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x0000F800, 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 u_int32_t masks_table_rgba[8][4] = {
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x00000000, 0x00000000, 0x00000000, 0x00000000 },
{ 0x0000F800, 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 u_int32_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 */
{ 0x0000F800, 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 u_int32_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 */
{ 0x0000F800, 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 u_int8_t bytes_per_pixel[8] = {
0, 0, 0, 2, 2, 4, 0, 4
};
const u_int8_t * bits;
const u_int32_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",
__FUNCTION__, __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",
__FUNCTION__, __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->haveAccumBuffer = ((modes->accumRedBits +
modes->accumGreenBits +
modes->accumBlueBits +
modes->accumAlphaBits) > 0);
modes->haveDepthBuffer = (modes->depthBits > 0);
modes->haveStencilBuffer = (modes->stencilBits > 0);
modes = modes->next;
}
}
}
*ptr_to_modes = modes;
return GL_TRUE;
}