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xenocara/xserver/hw/xquartz/GL/capabilities.c

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/*
* Copyright (c) 2008-2012 Apple Inc.
*
* 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, sublicense,
* 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 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE ABOVE LISTED COPYRIGHT HOLDER(S) 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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#define Cursor Mac_Cursor
#define BOOL Mac_BOOL
#include <OpenGL/OpenGL.h>
#include <OpenGL/gl.h>
#include <OpenGL/glu.h>
#include <OpenGL/glext.h>
#include <ApplicationServices/ApplicationServices.h>
#undef Cursor
#undef BOOL
#include "capabilities.h"
#include "os.h"
static void
handleBufferModes(struct glCapabilitiesConfig *c, GLint bufferModes)
{
if (bufferModes & kCGLStereoscopicBit) {
c->stereo = true;
}
if (bufferModes & kCGLDoubleBufferBit) {
c->buffers = 2;
}
else {
c->buffers = 1;
}
}
static void
handleStencilModes(struct glCapabilitiesConfig *c, GLint smodes)
{
int offset = 0;
if (kCGL0Bit & smodes)
c->stencil_bit_depths[offset++] = 0;
if (kCGL1Bit & smodes)
c->stencil_bit_depths[offset++] = 1;
if (kCGL2Bit & smodes)
c->stencil_bit_depths[offset++] = 2;
if (kCGL3Bit & smodes)
c->stencil_bit_depths[offset++] = 3;
if (kCGL4Bit & smodes)
c->stencil_bit_depths[offset++] = 4;
if (kCGL5Bit & smodes)
c->stencil_bit_depths[offset++] = 5;
if (kCGL6Bit & smodes)
c->stencil_bit_depths[offset++] = 6;
if (kCGL8Bit & smodes)
c->stencil_bit_depths[offset++] = 8;
if (kCGL10Bit & smodes)
c->stencil_bit_depths[offset++] = 10;
if (kCGL12Bit & smodes)
c->stencil_bit_depths[offset++] = 12;
if (kCGL16Bit & smodes)
c->stencil_bit_depths[offset++] = 16;
if (kCGL24Bit & smodes)
c->stencil_bit_depths[offset++] = 24;
if (kCGL32Bit & smodes)
c->stencil_bit_depths[offset++] = 32;
if (kCGL48Bit & smodes)
c->stencil_bit_depths[offset++] = 48;
if (kCGL64Bit & smodes)
c->stencil_bit_depths[offset++] = 64;
if (kCGL96Bit & smodes)
c->stencil_bit_depths[offset++] = 96;
if (kCGL128Bit & smodes)
c->stencil_bit_depths[offset++] = 128;
assert(offset < GLCAPS_STENCIL_BIT_DEPTH_BUFFERS);
c->total_stencil_bit_depths = offset;
}
static int
handleColorAndAccumulation(struct glColorBufCapabilities *c,
GLint cmodes, int forAccum)
{
int offset = 0;
/*1*/
if (kCGLRGB444Bit & cmodes) {
c[offset].r = 4;
c[offset].g = 4;
c[offset].b = 4;
++offset;
}
/*2*/
if (kCGLARGB4444Bit & cmodes) {
c[offset].a = 4;
c[offset].r = 4;
c[offset].g = 4;
c[offset].b = 4;
c[offset].is_argb = true;
++offset;
}
/*3*/
if (kCGLRGB444A8Bit & cmodes) {
c[offset].r = 4;
c[offset].g = 4;
c[offset].b = 4;
c[offset].a = 8;
++offset;
}
/*4*/
if (kCGLRGB555Bit & cmodes) {
c[offset].r = 5;
c[offset].g = 5;
c[offset].b = 5;
++offset;
}
/*5*/
if (kCGLARGB1555Bit & cmodes) {
c[offset].a = 1;
c[offset].r = 5;
c[offset].g = 5;
c[offset].b = 5;
c[offset].is_argb = true;
++offset;
}
/*6*/
if (kCGLRGB555A8Bit & cmodes) {
c[offset].r = 5;
c[offset].g = 5;
c[offset].b = 5;
c[offset].a = 8;
++offset;
}
/*7*/
if (kCGLRGB565Bit & cmodes) {
c[offset].r = 5;
c[offset].g = 6;
c[offset].b = 5;
++offset;
}
/*8*/
if (kCGLRGB565A8Bit & cmodes) {
c[offset].r = 5;
c[offset].g = 6;
c[offset].b = 5;
c[offset].a = 8;
++offset;
}
/*9*/
if (kCGLRGB888Bit & cmodes) {
c[offset].r = 8;
c[offset].g = 8;
c[offset].b = 8;
++offset;
}
/*10*/
if (kCGLARGB8888Bit & cmodes) {
c[offset].a = 8;
c[offset].r = 8;
c[offset].g = 8;
c[offset].b = 8;
c[offset].is_argb = true;
++offset;
}
/*11*/
if (kCGLRGB888A8Bit & cmodes) {
c[offset].r = 8;
c[offset].g = 8;
c[offset].b = 8;
c[offset].a = 8;
++offset;
}
if (forAccum) {
//#if 0
/* FIXME
* Disable this path, because some part of libGL, X, or Xplugin
* doesn't work with sizes greater than 8.
* When this is enabled and visuals are chosen using depths
* such as 16, the result is that the windows don't redraw
* and are often white, until a resize.
*/
/*12*/
if (kCGLRGB101010Bit & cmodes) {
c[offset].r = 10;
c[offset].g = 10;
c[offset].b = 10;
++offset;
}
/*13*/
if (kCGLARGB2101010Bit & cmodes) {
c[offset].a = 2;
c[offset].r = 10;
c[offset].g = 10;
c[offset].b = 10;
c[offset].is_argb = true;
++offset;
}
/*14*/
if (kCGLRGB101010_A8Bit & cmodes) {
c[offset].r = 10;
c[offset].g = 10;
c[offset].b = 10;
c[offset].a = 8;
++offset;
}
/*15*/
if (kCGLRGB121212Bit & cmodes) {
c[offset].r = 12;
c[offset].g = 12;
c[offset].b = 12;
++offset;
}
/*16*/
if (kCGLARGB12121212Bit & cmodes) {
c[offset].a = 12;
c[offset].r = 12;
c[offset].g = 12;
c[offset].b = 12;
c[offset].is_argb = true;
++offset;
}
/*17*/
if (kCGLRGB161616Bit & cmodes) {
c[offset].r = 16;
c[offset].g = 16;
c[offset].b = 16;
++offset;
}
/*18*/
if (kCGLRGBA16161616Bit & cmodes) {
c[offset].r = 16;
c[offset].g = 16;
c[offset].b = 16;
c[offset].a = 16;
++offset;
}
}
//#endif
/* FIXME should we handle the floating point color modes, and if so, how? */
return offset;
}
static void
handleColorModes(struct glCapabilitiesConfig *c, GLint cmodes)
{
c->total_color_buffers = handleColorAndAccumulation(c->color_buffers,
cmodes, 0);
assert(c->total_color_buffers < GLCAPS_COLOR_BUFFERS);
}
static void
handleAccumulationModes(struct glCapabilitiesConfig *c, GLint cmodes)
{
c->total_accum_buffers = handleColorAndAccumulation(c->accum_buffers,
cmodes, 1);
assert(c->total_accum_buffers < GLCAPS_COLOR_BUFFERS);
}
static void
handleDepthModes(struct glCapabilitiesConfig *c, GLint dmodes)
{
int offset = 0;
#define DEPTH(flag, value) do { \
if (dmodes & flag) { \
c->depth_buffers[offset++] = value; \
} \
} while (0)
/*1*/
DEPTH(kCGL0Bit, 0);
/*2*/
DEPTH(kCGL1Bit, 1);
/*3*/
DEPTH(kCGL2Bit, 2);
/*4*/
DEPTH(kCGL3Bit, 3);
/*5*/
DEPTH(kCGL4Bit, 4);
/*6*/
DEPTH(kCGL5Bit, 5);
/*7*/
DEPTH(kCGL6Bit, 6);
/*8*/
DEPTH(kCGL8Bit, 8);
/*9*/
DEPTH(kCGL10Bit, 10);
/*10*/
DEPTH(kCGL12Bit, 12);
/*11*/
DEPTH(kCGL16Bit, 16);
/*12*/
DEPTH(kCGL24Bit, 24);
/*13*/
DEPTH(kCGL32Bit, 32);
/*14*/
DEPTH(kCGL48Bit, 48);
/*15*/
DEPTH(kCGL64Bit, 64);
/*16*/
DEPTH(kCGL96Bit, 96);
/*17*/
DEPTH(kCGL128Bit, 128);
#undef DEPTH
c->total_depth_buffer_depths = offset;
assert(c->total_depth_buffer_depths < GLCAPS_DEPTH_BUFFERS);
}
/* Return non-zero if an error occured. */
static CGLError
handleRendererDescriptions(CGLRendererInfoObj info, GLint r,
struct glCapabilitiesConfig *c)
{
CGLError err;
GLint accelerated = 0, flags = 0, aux = 0, samplebufs = 0, samples = 0;
err = CGLDescribeRenderer(info, r, kCGLRPAccelerated, &accelerated);
if (err)
return err;
c->accelerated = accelerated;
/* Buffering modes: single/double, stereo */
err = CGLDescribeRenderer(info, r, kCGLRPBufferModes, &flags);
if (err)
return err;
handleBufferModes(c, flags);
/* AUX buffers */
err = CGLDescribeRenderer(info, r, kCGLRPMaxAuxBuffers, &aux);
if (err)
return err;
c->aux_buffers = aux;
/* Depth buffer size */
err = CGLDescribeRenderer(info, r, kCGLRPDepthModes, &flags);
if (err)
return err;
handleDepthModes(c, flags);
/* Multisample buffers */
err = CGLDescribeRenderer(info, r, kCGLRPMaxSampleBuffers, &samplebufs);
if (err)
return err;
c->multisample_buffers = samplebufs;
/* Multisample samples per multisample buffer */
err = CGLDescribeRenderer(info, r, kCGLRPMaxSamples, &samples);
if (err)
return err;
c->multisample_samples = samples;
/* Stencil bit depths */
err = CGLDescribeRenderer(info, r, kCGLRPStencilModes, &flags);
if (err)
return err;
handleStencilModes(c, flags);
/* Color modes (RGB/RGBA depths supported */
err = CGLDescribeRenderer(info, r, kCGLRPColorModes, &flags);
if (err)
return err;
handleColorModes(c, flags);
err = CGLDescribeRenderer(info, r, kCGLRPAccumModes, &flags);
if (err)
return err;
handleAccumulationModes(c, flags);
return kCGLNoError;
}
static void
initCapabilities(struct glCapabilities *cap)
{
cap->configurations = NULL;
cap->total_configurations = 0;
}
static void
initConfig(struct glCapabilitiesConfig *c)
{
int i;
c->accelerated = false;
c->stereo = false;
c->aux_buffers = 0;
c->buffers = 0;
c->total_depth_buffer_depths = 0;
for (i = 0; i < GLCAPS_DEPTH_BUFFERS; ++i) {
c->depth_buffers[i] = GLCAPS_INVALID_DEPTH_VALUE;
}
c->multisample_buffers = 0;
c->multisample_samples = 0;
c->total_stencil_bit_depths = 0;
for (i = 0; i < GLCAPS_STENCIL_BIT_DEPTH_BUFFERS; ++i) {
c->stencil_bit_depths[i] = GLCAPS_INVALID_STENCIL_DEPTH;
}
c->total_color_buffers = 0;
for (i = 0; i < GLCAPS_COLOR_BUFFERS; ++i) {
c->color_buffers[i].r = c->color_buffers[i].g =
c->color_buffers[i].b =
c->color_buffers[i].a =
GLCAPS_COLOR_BUF_INVALID_VALUE;
c->color_buffers[i].is_argb = false;
}
c->total_accum_buffers = 0;
for (i = 0; i < GLCAPS_COLOR_BUFFERS; ++i) {
c->accum_buffers[i].r = c->accum_buffers[i].g =
c->accum_buffers[i].b =
c->accum_buffers[i].a =
GLCAPS_COLOR_BUF_INVALID_VALUE;
c->accum_buffers[i].is_argb = false;
}
c->next = NULL;
}
void
freeGlCapabilities(struct glCapabilities *cap)
{
struct glCapabilitiesConfig *conf, *next;
conf = cap->configurations;
while (conf) {
next = conf->next;
free(conf);
conf = next;
}
cap->configurations = NULL;
}
/*Return true if an error occured. */
bool
getGlCapabilities(struct glCapabilities *cap)
{
CGLRendererInfoObj info;
CGLError err;
GLint numRenderers = 0, r;
initCapabilities(cap);
err = CGLQueryRendererInfo((GLuint) - 1, &info, &numRenderers);
if (err) {
ErrorF("CGLQueryRendererInfo error: %s\n", CGLErrorString(err));
return err;
}
for (r = 0; r < numRenderers; r++) {
struct glCapabilitiesConfig tmpconf, *conf;
initConfig(&tmpconf);
err = handleRendererDescriptions(info, r, &tmpconf);
if (err) {
ErrorF("handleRendererDescriptions returned error: %s\n",
CGLErrorString(
err));
ErrorF("trying to continue...\n");
continue;
}
conf = malloc(sizeof(*conf));
if (NULL == conf) {
FatalError("Unable to allocate memory for OpenGL capabilities\n");
}
/* Copy the struct. */
*conf = tmpconf;
/* Now link the configuration into the list. */
conf->next = cap->configurations;
cap->configurations = conf;
}
CGLDestroyRendererInfo(info);
/* No error occured. We are done. */
return kCGLNoError;
}
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