/*
* (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 <stdbool.h>
#include "main/macros.h"
#include "main/mtypes.h"
#include "main/cpuinfo.h"
#include "main/extensions.h"
#include "utils.h"
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 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,
GLuint agp_mode )
{
unsigned offset;
char *cpu;
offset
= sprintf( buffer
, "Mesa DRI %s", hardware_name
);
/* 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.
*/
cpu = _mesa_get_cpu_string();
if (cpu) {
offset
+= sprintf(buffer
+ offset
, " %s", cpu
); }
return offset;
}
/**
* Creates a set of \c struct gl_config that a driver will expose.
*
* A set of \c struct gl_config 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 struct gl_config 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 struct gl_config 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 struct gl_config. 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 format Mesa gl_format enum describing the pixel format
* \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 msaa_samples Array of msaa sample count. 0 represents a visual
* without a multisample buffer.
* \param num_msaa_modes Number of entries in \c msaa_samples.
* \param visType GLX visual type. Usually either \c GLX_TRUE_COLOR or
* \c GLX_DIRECT_COLOR.
*
* \returns
* Pointer to any array of pointers to the \c __DRIconfig structures created
* for the specified formats. If there is an error, \c NULL is returned.
* Currently the only cause of failure is a bad parameter (i.e., unsupported
* \c format).
*/
__DRIconfig **
driCreateConfigs(gl_format format,
const uint8_t * depth_bits, const uint8_t * stencil_bits,
unsigned num_depth_stencil_bits,
const GLenum * db_modes, unsigned num_db_modes,
const uint8_t * msaa_samples, unsigned num_msaa_modes,
GLboolean enable_accum)
{
static const uint32_t masks_table[][4] = {
/* MESA_FORMAT_RGB565 */
{ 0x0000F800, 0x000007E0, 0x0000001F, 0x00000000 },
/* MESA_FORMAT_XRGB8888 */
{ 0x00FF0000, 0x0000FF00, 0x000000FF, 0x00000000 },
/* MESA_FORMAT_ARGB8888 */
{ 0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000 },
};
const uint32_t * masks;
__DRIconfig **configs, **c;
struct gl_config *modes;
unsigned i, j, k, h;
unsigned num_modes;
unsigned num_accum_bits = (enable_accum) ? 2 : 1;
int red_bits;
int green_bits;
int blue_bits;
int alpha_bits;
bool is_srgb;
switch (format) {
case MESA_FORMAT_RGB565:
masks = masks_table[0];
break;
case MESA_FORMAT_XRGB8888:
masks = masks_table[1];
break;
case MESA_FORMAT_ARGB8888:
case MESA_FORMAT_SARGB8:
masks = masks_table[2];
break;
default:
fprintf(stderr
, "[%s:%u] Unknown framebuffer type %s (%d).\n", __FUNCTION__, __LINE__,
_mesa_get_format_name(format), format);
return NULL;
}
red_bits = _mesa_get_format_bits(format, GL_RED_BITS);
green_bits = _mesa_get_format_bits(format, GL_GREEN_BITS);
blue_bits = _mesa_get_format_bits(format, GL_BLUE_BITS);
alpha_bits = _mesa_get_format_bits(format, GL_ALPHA_BITS);
is_srgb = _mesa_get_format_color_encoding(format) == GL_SRGB;
num_modes = num_depth_stencil_bits * num_db_modes * num_accum_bits * num_msaa_modes;
configs
= calloc(1, (num_modes
+ 1) * sizeof *configs
); if (configs == NULL)
return NULL;
c = configs;
for ( k = 0 ; k < num_depth_stencil_bits ; k++ ) {
for ( i = 0 ; i < num_db_modes ; i++ ) {
for ( h = 0 ; h < num_msaa_modes; h++ ) {
for ( j = 0 ; j < num_accum_bits ; j++ ) {
modes = &(*c)->modes;
c++;
memset(modes
, 0, sizeof *modes
); modes->redBits = red_bits;
modes->greenBits = green_bits;
modes->blueBits = blue_bits;
modes->alphaBits = alpha_bits;
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->transparentPixel = GLX_NONE;
modes->transparentRed = GLX_DONT_CARE;
modes->transparentGreen = GLX_DONT_CARE;
modes->transparentBlue = GLX_DONT_CARE;
modes->transparentAlpha = GLX_DONT_CARE;
modes->transparentIndex = GLX_DONT_CARE;
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->samples = msaa_samples[h];
modes->sampleBuffers = modes->samples ? 1 : 0;
modes->haveAccumBuffer = ((modes->accumRedBits +
modes->accumGreenBits +
modes->accumBlueBits +
modes->accumAlphaBits) > 0);
modes->haveDepthBuffer = (modes->depthBits > 0);
modes->haveStencilBuffer = (modes->stencilBits > 0);
modes->bindToTextureRgb = GL_TRUE;
modes->bindToTextureRgba = GL_TRUE;
modes->bindToMipmapTexture = GL_FALSE;
modes->bindToTextureTargets =
__DRI_ATTRIB_TEXTURE_1D_BIT |
__DRI_ATTRIB_TEXTURE_2D_BIT |
__DRI_ATTRIB_TEXTURE_RECTANGLE_BIT;
modes->sRGBCapable = is_srgb;
}
}
}
}
*c = NULL;
return configs;
}
__DRIconfig **driConcatConfigs(__DRIconfig **a,
__DRIconfig **b)
{
__DRIconfig **all;
int i, j, index;
if (a == NULL || a[0] == NULL)
return b;
else if (b == NULL || b[0] == NULL)
return a;
i = 0;
while (a[i] != NULL)
i++;
j = 0;
while (b[j] != NULL)
j++;
all
= malloc((i
+ j
+ 1) * sizeof *all
); index = 0;
for (i = 0; a[i] != NULL; i++)
all[index++] = a[i];
for (j = 0; b[j] != NULL; j++)
all[index++] = b[j];
all[index++] = NULL;
return all;
}
#define __ATTRIB(attrib, field) \
{ attrib, offsetof(struct gl_config, field) }
static const struct { unsigned int attrib, offset; } attribMap[] = {
__ATTRIB(__DRI_ATTRIB_BUFFER_SIZE, rgbBits),
__ATTRIB(__DRI_ATTRIB_LEVEL, level),
__ATTRIB(__DRI_ATTRIB_RED_SIZE, redBits),
__ATTRIB(__DRI_ATTRIB_GREEN_SIZE, greenBits),
__ATTRIB(__DRI_ATTRIB_BLUE_SIZE, blueBits),
__ATTRIB(__DRI_ATTRIB_ALPHA_SIZE, alphaBits),
__ATTRIB(__DRI_ATTRIB_DEPTH_SIZE, depthBits),
__ATTRIB(__DRI_ATTRIB_STENCIL_SIZE, stencilBits),
__ATTRIB(__DRI_ATTRIB_ACCUM_RED_SIZE, accumRedBits),
__ATTRIB(__DRI_ATTRIB_ACCUM_GREEN_SIZE, accumGreenBits),
__ATTRIB(__DRI_ATTRIB_ACCUM_BLUE_SIZE, accumBlueBits),
__ATTRIB(__DRI_ATTRIB_ACCUM_ALPHA_SIZE, accumAlphaBits),
__ATTRIB(__DRI_ATTRIB_SAMPLE_BUFFERS, sampleBuffers),
__ATTRIB(__DRI_ATTRIB_SAMPLES, samples),
__ATTRIB(__DRI_ATTRIB_DOUBLE_BUFFER, doubleBufferMode),
__ATTRIB(__DRI_ATTRIB_STEREO, stereoMode),
__ATTRIB(__DRI_ATTRIB_AUX_BUFFERS, numAuxBuffers),
__ATTRIB(__DRI_ATTRIB_TRANSPARENT_TYPE, transparentPixel),
__ATTRIB(__DRI_ATTRIB_TRANSPARENT_INDEX_VALUE, transparentPixel),
__ATTRIB(__DRI_ATTRIB_TRANSPARENT_RED_VALUE, transparentRed),
__ATTRIB(__DRI_ATTRIB_TRANSPARENT_GREEN_VALUE, transparentGreen),
__ATTRIB(__DRI_ATTRIB_TRANSPARENT_BLUE_VALUE, transparentBlue),
__ATTRIB(__DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE, transparentAlpha),
__ATTRIB(__DRI_ATTRIB_RED_MASK, redMask),
__ATTRIB(__DRI_ATTRIB_GREEN_MASK, greenMask),
__ATTRIB(__DRI_ATTRIB_BLUE_MASK, blueMask),
__ATTRIB(__DRI_ATTRIB_ALPHA_MASK, alphaMask),
__ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_WIDTH, maxPbufferWidth),
__ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_HEIGHT, maxPbufferHeight),
__ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_PIXELS, maxPbufferPixels),
__ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH, optimalPbufferWidth),
__ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT, optimalPbufferHeight),
__ATTRIB(__DRI_ATTRIB_SWAP_METHOD, swapMethod),
__ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGB, bindToTextureRgb),
__ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGBA, bindToTextureRgba),
__ATTRIB(__DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE, bindToMipmapTexture),
__ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS, bindToTextureTargets),
__ATTRIB(__DRI_ATTRIB_YINVERTED, yInverted),
__ATTRIB(__DRI_ATTRIB_FRAMEBUFFER_SRGB_CAPABLE, sRGBCapable),
/* The struct field doesn't matter here, these are handled by the
* switch in driGetConfigAttribIndex. We need them in the array
* so the iterator includes them though.*/
__ATTRIB(__DRI_ATTRIB_RENDER_TYPE, level),
__ATTRIB(__DRI_ATTRIB_CONFIG_CAVEAT, level),
__ATTRIB(__DRI_ATTRIB_SWAP_METHOD, level)
};
/**
* Return the value of a configuration attribute. The attribute is
* indicated by the index.
*/
static int
driGetConfigAttribIndex(const __DRIconfig *config,
unsigned int index, unsigned int *value)
{
switch (attribMap[index].attrib) {
case __DRI_ATTRIB_RENDER_TYPE:
/* no support for color index mode */
*value = __DRI_ATTRIB_RGBA_BIT;
break;
case __DRI_ATTRIB_CONFIG_CAVEAT:
if (config->modes.visualRating == GLX_NON_CONFORMANT_CONFIG)
*value = __DRI_ATTRIB_NON_CONFORMANT_CONFIG;
else if (config->modes.visualRating == GLX_SLOW_CONFIG)
*value = __DRI_ATTRIB_SLOW_BIT;
else
*value = 0;
break;
case __DRI_ATTRIB_SWAP_METHOD:
/* XXX no return value??? */
break;
default:
/* any other int-sized field */
*value = *(unsigned int *)
((char *) &config->modes + attribMap[index].offset);
break;
}
return GL_TRUE;
}
/**
* Get the value of a configuration attribute.
* \param attrib the attribute (one of the _DRI_ATTRIB_x tokens)
* \param value returns the attribute's value
* \return 1 for success, 0 for failure
*/
int
driGetConfigAttrib(const __DRIconfig *config,
unsigned int attrib, unsigned int *value)
{
int i;
for (i = 0; i < ARRAY_SIZE(attribMap); i++)
if (attribMap[i].attrib == attrib)
return driGetConfigAttribIndex(config, i, value);
return GL_FALSE;
}
/**
* Get a configuration attribute name and value, given an index.
* \param index which field of the __DRIconfig to query
* \param attrib returns the attribute name (one of the _DRI_ATTRIB_x tokens)
* \param value returns the attribute's value
* \return 1 for success, 0 for failure
*/
int
driIndexConfigAttrib(const __DRIconfig *config, int index,
unsigned int *attrib, unsigned int *value)
{
if (index >= 0 && index < ARRAY_SIZE(attribMap)) {
*attrib = attribMap[index].attrib;
return driGetConfigAttribIndex(config, index, value);
}
return GL_FALSE;
}