--- /dev/null
+/*
+ * (C) Copyright IBM Corporation 2003
+ * 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 glcontextmodes.c
+ * Utility routines for working with \c __GLcontextModes structures. At
+ * some point most or all of these functions will be moved to the Mesa
+ * code base.
+ *
+ * \author Ian Romanick <idr@us.ibm.com>
+ */
+
+#if defined(IN_MINI_GLX)
+#include <GL/gl.h>
+#else
+#if defined(HAVE_DIX_CONFIG_H)
+#include <dix-config.h>
+#endif
+#include <X11/X.h>
+#include <GL/glx.h>
+#include "GL/glxint.h"
+#endif
+
+/* Memory macros */
+#if defined(IN_MINI_GLX)
+#include <stdlib.h>
+#include <string.h>
+#define _mesa_malloc(b) malloc(b)
+#define _mesa_free(m) free(m)
+#define _mesa_memset memset
+#else
+#ifdef XFree86Server
+#include <os.h>
+#include <string.h>
+#define _mesa_malloc(b) malloc(b)
+#define _mesa_free(m) free(m)
+#define _mesa_memset memset
+#else
+#include <X11/Xlibint.h>
+#define _mesa_memset memset
+#define _mesa_malloc(b) Xmalloc(b)
+#define _mesa_free(m) free(m)
+#endif /* XFree86Server */
+#endif /* !defined(IN_MINI_GLX) */
+
+#include "glcontextmodes.h"
+
+#if !defined(IN_MINI_GLX)
+#define NUM_VISUAL_TYPES 6
+
+/**
+ * Convert an X visual type to a GLX visual type.
+ *
+ * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
+ * to be converted.
+ * \return If \c visualType is a valid X visual type, a GLX visual type will
+ * be returned. Otherwise \c GLX_NONE will be returned.
+ */
+GLint
+_gl_convert_from_x_visual_type(int visualType)
+{
+ static const int glx_visual_types[NUM_VISUAL_TYPES] = {
+ GLX_STATIC_GRAY, GLX_GRAY_SCALE,
+ GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
+ GLX_TRUE_COLOR, GLX_DIRECT_COLOR
+ };
+
+ return ((unsigned)visualType < NUM_VISUAL_TYPES)
+ ? glx_visual_types[visualType] : GLX_NONE;
+}
+
+/**
+ * Convert a GLX visual type to an X visual type.
+ *
+ * \param visualType GLX visual type (i.e., \c GLX_TRUE_COLOR,
+ * \c GLX_STATIC_GRAY, etc.) to be converted.
+ * \return If \c visualType is a valid GLX visual type, an X visual type will
+ * be returned. Otherwise -1 will be returned.
+ */
+GLint
+_gl_convert_to_x_visual_type(int visualType)
+{
+ static const int x_visual_types[NUM_VISUAL_TYPES] = {
+ TrueColor, DirectColor,
+ PseudoColor, StaticColor,
+ GrayScale, StaticGray
+ };
+
+ return ((unsigned)(visualType - GLX_TRUE_COLOR) < NUM_VISUAL_TYPES)
+ ? x_visual_types[visualType - GLX_TRUE_COLOR] : -1;
+}
+
+/**
+ * Copy a GLX visual config structure to a GL context mode structure. All
+ * of the fields in \c config are copied to \c mode. Additional fields in
+ * \c mode that can be derrived from the fields of \c config (i.e.,
+ * \c haveDepthBuffer) are also filled in. The remaining fields in \c mode
+ * that cannot be derived are set to default values.
+ *
+ * \param mode Destination GL context mode.
+ * \param config Source GLX visual config.
+ *
+ * \note
+ * The \c fbconfigID and \c visualID fields of the \c __GLcontextModes
+ * structure will be set to the \c vid of the \c __GLXvisualConfig structure.
+ */
+void
+_gl_copy_visual_to_context_mode(__GLcontextModes * mode,
+ const __GLXvisualConfig * config)
+{
+ __GLcontextModes * const next = mode->next;
+
+ (void)_mesa_memset(mode, 0, sizeof(__GLcontextModes));
+ mode->next = next;
+
+ mode->visualID = config->vid;
+ mode->visualType = _gl_convert_from_x_visual_type(config->class);
+ mode->xRenderable = GL_TRUE;
+ mode->fbconfigID = config->vid;
+ mode->drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT;
+
+ mode->rgbMode = (config->rgba != 0);
+ mode->renderType = (mode->rgbMode) ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
+
+ mode->colorIndexMode = !(mode->rgbMode);
+ mode->doubleBufferMode = (config->doubleBuffer != 0);
+ mode->stereoMode = (config->stereo != 0);
+
+ mode->haveAccumBuffer = ((config->accumRedSize +
+ config->accumGreenSize +
+ config->accumBlueSize +
+ config->accumAlphaSize) > 0);
+ mode->haveDepthBuffer = (config->depthSize > 0);
+ mode->haveStencilBuffer = (config->stencilSize > 0);
+
+ mode->redBits = config->redSize;
+ mode->greenBits = config->greenSize;
+ mode->blueBits = config->blueSize;
+ mode->alphaBits = config->alphaSize;
+ mode->redMask = config->redMask;
+ mode->greenMask = config->greenMask;
+ mode->blueMask = config->blueMask;
+ mode->alphaMask = config->alphaMask;
+ mode->rgbBits = mode->rgbMode ? config->bufferSize : 0;
+ mode->indexBits = mode->colorIndexMode ? config->bufferSize : 0;
+
+ mode->accumRedBits = config->accumRedSize;
+ mode->accumGreenBits = config->accumGreenSize;
+ mode->accumBlueBits = config->accumBlueSize;
+ mode->accumAlphaBits = config->accumAlphaSize;
+ mode->depthBits = config->depthSize;
+ mode->stencilBits = config->stencilSize;
+
+ mode->numAuxBuffers = config->auxBuffers;
+ mode->level = config->level;
+
+ mode->visualRating = config->visualRating;
+ mode->transparentPixel = config->transparentPixel;
+ mode->transparentRed = config->transparentRed;
+ mode->transparentGreen = config->transparentGreen;
+ mode->transparentBlue = config->transparentBlue;
+ mode->transparentAlpha = config->transparentAlpha;
+ mode->transparentIndex = config->transparentIndex;
+ mode->samples = config->multiSampleSize;
+ mode->sampleBuffers = config->nMultiSampleBuffers;
+ /* mode->visualSelectGroup = config->visualSelectGroup; ? */
+
+ mode->swapMethod = GLX_SWAP_UNDEFINED_OML;
+
+ mode->bindToTextureRgb = (mode->rgbMode) ? GL_TRUE : GL_FALSE;
+ mode->bindToTextureRgba = (mode->rgbMode && mode->alphaBits) ?
+ GL_TRUE : GL_FALSE;
+ mode->bindToMipmapTexture = mode->rgbMode ? GL_TRUE : GL_FALSE;
+ mode->bindToTextureTargets = mode->rgbMode ?
+ GLX_TEXTURE_1D_BIT_EXT |
+ GLX_TEXTURE_2D_BIT_EXT |
+ GLX_TEXTURE_RECTANGLE_BIT_EXT : 0;
+ mode->yInverted = GL_FALSE;
+}
+
+/**
+ * Get data from a GL context mode.
+ *
+ * \param mode GL context mode whose data is to be returned.
+ * \param attribute Attribute of \c mode that is to be returned.
+ * \param value_return Location to store the data member of \c mode.
+ * \return If \c attribute is a valid attribute of \c mode, zero is
+ * returned. Otherwise \c GLX_BAD_ATTRIBUTE is returned.
+ */
+int
+_gl_get_context_mode_data(const __GLcontextModes *mode, int attribute,
+ int *value_return)
+{
+ switch (attribute) {
+ case GLX_USE_GL:
+ *value_return = GL_TRUE;
+ return 0;
+
+ case GLX_BUFFER_SIZE:
+ *value_return = mode->rgbBits;
+ return 0;
+
+ case GLX_RGBA:
+ *value_return = mode->rgbMode;
+ return 0;
+
+ case GLX_RED_SIZE:
+ *value_return = mode->redBits;
+ return 0;
+
+ case GLX_GREEN_SIZE:
+ *value_return = mode->greenBits;
+ return 0;
+
+ case GLX_BLUE_SIZE:
+ *value_return = mode->blueBits;
+ return 0;
+
+ case GLX_ALPHA_SIZE:
+ *value_return = mode->alphaBits;
+ return 0;
+
+ case GLX_DOUBLEBUFFER:
+ *value_return = mode->doubleBufferMode;
+ return 0;
+
+ case GLX_STEREO:
+ *value_return = mode->stereoMode;
+ return 0;
+
+ case GLX_AUX_BUFFERS:
+ *value_return = mode->numAuxBuffers;
+ return 0;
+
+ case GLX_DEPTH_SIZE:
+ *value_return = mode->depthBits;
+ return 0;
+
+ case GLX_STENCIL_SIZE:
+ *value_return = mode->stencilBits;
+ return 0;
+
+ case GLX_ACCUM_RED_SIZE:
+ *value_return = mode->accumRedBits;
+ return 0;
+
+ case GLX_ACCUM_GREEN_SIZE:
+ *value_return = mode->accumGreenBits;
+ return 0;
+
+ case GLX_ACCUM_BLUE_SIZE:
+ *value_return = mode->accumBlueBits;
+ return 0;
+
+ case GLX_ACCUM_ALPHA_SIZE:
+ *value_return = mode->accumAlphaBits;
+ return 0;
+
+ case GLX_LEVEL:
+ *value_return = mode->level;
+ return 0;
+
+ case GLX_TRANSPARENT_TYPE_EXT:
+ *value_return = mode->transparentPixel;
+ return 0;
+
+ case GLX_TRANSPARENT_RED_VALUE:
+ *value_return = mode->transparentRed;
+ return 0;
+
+ case GLX_TRANSPARENT_GREEN_VALUE:
+ *value_return = mode->transparentGreen;
+ return 0;
+
+ case GLX_TRANSPARENT_BLUE_VALUE:
+ *value_return = mode->transparentBlue;
+ return 0;
+
+ case GLX_TRANSPARENT_ALPHA_VALUE:
+ *value_return = mode->transparentAlpha;
+ return 0;
+
+ case GLX_TRANSPARENT_INDEX_VALUE:
+ *value_return = mode->transparentIndex;
+ return 0;
+
+ case GLX_X_VISUAL_TYPE:
+ *value_return = mode->visualType;
+ return 0;
+
+ case GLX_CONFIG_CAVEAT:
+ *value_return = mode->visualRating;
+ return 0;
+
+ case GLX_VISUAL_ID:
+ *value_return = mode->visualID;
+ return 0;
+
+ case GLX_DRAWABLE_TYPE:
+ *value_return = mode->drawableType;
+ return 0;
+
+ case GLX_RENDER_TYPE:
+ *value_return = mode->renderType;
+ return 0;
+
+ case GLX_X_RENDERABLE:
+ *value_return = mode->xRenderable;
+ return 0;
+
+ case GLX_FBCONFIG_ID:
+ *value_return = mode->fbconfigID;
+ return 0;
+
+ case GLX_MAX_PBUFFER_WIDTH:
+ *value_return = mode->maxPbufferWidth;
+ return 0;
+
+ case GLX_MAX_PBUFFER_HEIGHT:
+ *value_return = mode->maxPbufferHeight;
+ return 0;
+
+ case GLX_MAX_PBUFFER_PIXELS:
+ *value_return = mode->maxPbufferPixels;
+ return 0;
+
+ case GLX_OPTIMAL_PBUFFER_WIDTH_SGIX:
+ *value_return = mode->optimalPbufferWidth;
+ return 0;
+
+ case GLX_OPTIMAL_PBUFFER_HEIGHT_SGIX:
+ *value_return = mode->optimalPbufferHeight;
+ return 0;
+
+ case GLX_SWAP_METHOD_OML:
+ *value_return = mode->swapMethod;
+ return 0;
+
+ case GLX_SAMPLE_BUFFERS_SGIS:
+ *value_return = mode->sampleBuffers;
+ return 0;
+
+ case GLX_SAMPLES_SGIS:
+ *value_return = mode->samples;
+ return 0;
+
+ case GLX_BIND_TO_TEXTURE_RGB_EXT:
+ *value_return = mode->bindToTextureRgb;
+ return 0;
+
+ case GLX_BIND_TO_TEXTURE_RGBA_EXT:
+ *value_return = mode->bindToTextureRgba;
+ return 0;
+
+ case GLX_BIND_TO_MIPMAP_TEXTURE_EXT:
+ *value_return = mode->bindToMipmapTexture == GL_TRUE ? GL_TRUE :
+ GL_FALSE;
+ return 0;
+
+ case GLX_BIND_TO_TEXTURE_TARGETS_EXT:
+ *value_return = mode->bindToTextureTargets;
+ return 0;
+
+ case GLX_Y_INVERTED_EXT:
+ *value_return = mode->yInverted;
+ return 0;
+
+ /* Applications are NOT allowed to query GLX_VISUAL_SELECT_GROUP_SGIX.
+ * It is ONLY for communication between the GLX client and the GLX
+ * server.
+ */
+ case GLX_VISUAL_SELECT_GROUP_SGIX:
+ default:
+ return GLX_BAD_ATTRIBUTE;
+ }
+}
+#endif /* !defined(IN_MINI_GLX) */
+
+/**
+ * Allocate a linked list of \c __GLcontextModes structures. The fields of
+ * each structure will be initialized to "reasonable" default values. In
+ * most cases this is the default value defined by table 3.4 of the GLX
+ * 1.3 specification. This means that most values are either initialized to
+ * zero or \c GLX_DONT_CARE (which is -1). As support for additional
+ * extensions is added, the new values will be initialized to appropriate
+ * values from the extension specification.
+ *
+ * \param count Number of structures to allocate.
+ * \param minimum_size Minimum size of a structure to allocate. This allows
+ * for differences in the version of the
+ * \c __GLcontextModes stucture used in libGL and in a
+ * DRI-based driver.
+ * \returns A pointer to the first element in a linked list of \c count
+ * stuctures on success, or \c NULL on failure.
+ *
+ * \warning Use of \c minimum_size does \b not guarantee binary compatibility.
+ * The fundamental assumption is that if the \c minimum_size
+ * specified by the driver and the size of the \c __GLcontextModes
+ * structure in libGL is the same, then the meaning of each byte in
+ * the structure is the same in both places. \b Be \b careful!
+ * Basically this means that fields have to be added in libGL and
+ * then propagated to drivers. Drivers should \b never arbitrarilly
+ * extend the \c __GLcontextModes data-structure.
+ */
+__GLcontextModes *
+_gl_context_modes_create(unsigned count, size_t minimum_size)
+{
+ const size_t size = (minimum_size > sizeof(__GLcontextModes))
+ ? minimum_size : sizeof(__GLcontextModes);
+ __GLcontextModes * base = NULL;
+ __GLcontextModes ** next;
+ unsigned i;
+
+ next = &base;
+ for (i = 0; i < count; i++) {
+ *next = (__GLcontextModes *)_mesa_malloc(size);
+ if (*next == NULL) {
+ _gl_context_modes_destroy(base);
+ base = NULL;
+ break;
+ }
+
+ (void)_mesa_memset(*next, 0, size);
+ (*next)->visualID = GLX_DONT_CARE;
+ (*next)->visualType = GLX_DONT_CARE;
+ (*next)->visualRating = GLX_NONE;
+ (*next)->transparentPixel = GLX_NONE;
+ (*next)->transparentRed = GLX_DONT_CARE;
+ (*next)->transparentGreen = GLX_DONT_CARE;
+ (*next)->transparentBlue = GLX_DONT_CARE;
+ (*next)->transparentAlpha = GLX_DONT_CARE;
+ (*next)->transparentIndex = GLX_DONT_CARE;
+ (*next)->xRenderable = GLX_DONT_CARE;
+ (*next)->fbconfigID = GLX_DONT_CARE;
+ (*next)->swapMethod = GLX_SWAP_UNDEFINED_OML;
+ (*next)->bindToTextureRgb = GLX_DONT_CARE;
+ (*next)->bindToTextureRgba = GLX_DONT_CARE;
+ (*next)->bindToMipmapTexture = GLX_DONT_CARE;
+ (*next)->bindToTextureTargets = GLX_DONT_CARE;
+ (*next)->yInverted = GLX_DONT_CARE;
+
+ next = &((*next)->next);
+ }
+
+ return base;
+}
+
+/**
+ * Destroy a linked list of \c __GLcontextModes structures created by
+ * \c _gl_context_modes_create.
+ *
+ * \param modes Linked list of structures to be destroyed. All structres
+ * in the list will be freed.
+ */
+void
+_gl_context_modes_destroy(__GLcontextModes * modes)
+{
+ while (modes != NULL) {
+ __GLcontextModes * const next = modes->next;
+
+ _mesa_free(modes);
+ modes = next;
+ }
+}
+
+/**
+ * Find a context mode matching a Visual ID.
+ *
+ * \param modes List list of context-mode structures to be searched.
+ * \param vid Visual ID to be found.
+ * \returns A pointer to a context-mode in \c modes if \c vid was found in
+ * the list, or \c NULL if it was not.
+ */
+
+__GLcontextModes *
+_gl_context_modes_find_visual(__GLcontextModes *modes, int vid)
+{
+ __GLcontextModes *m;
+
+ for (m = modes; m != NULL; m = m->next)
+ if (m->visualID == vid)
+ return m;
+
+ return NULL;
+}
+
+__GLcontextModes *
+_gl_context_modes_find_fbconfig(__GLcontextModes *modes, int fbid)
+{
+ __GLcontextModes *m;
+
+ for (m = modes; m != NULL; m = m->next)
+ if (m->fbconfigID == fbid)
+ return m;
+
+ return NULL;
+}
+
+/**
+ * Determine if two context-modes are the same. This is intended to be used
+ * by libGL implementations to compare to sets of driver generated FBconfigs.
+ *
+ * \param a Context-mode to be compared.
+ * \param b Context-mode to be compared.
+ * \returns \c GL_TRUE if the two context-modes are the same. \c GL_FALSE is
+ * returned otherwise.
+ */
+GLboolean
+_gl_context_modes_are_same(const __GLcontextModes * a,
+ const __GLcontextModes * b)
+{
+ return ((a->rgbMode == b->rgbMode) &&
+ (a->floatMode == b->floatMode) &&
+ (a->colorIndexMode == b->colorIndexMode) &&
+ (a->doubleBufferMode == b->doubleBufferMode) &&
+ (a->stereoMode == b->stereoMode) &&
+ (a->redBits == b->redBits) &&
+ (a->greenBits == b->greenBits) &&
+ (a->blueBits == b->blueBits) &&
+ (a->alphaBits == b->alphaBits) &&
+#if 0 /* For some reason these don't get set on the client-side in libGL. */
+ (a->redMask == b->redMask) &&
+ (a->greenMask == b->greenMask) &&
+ (a->blueMask == b->blueMask) &&
+ (a->alphaMask == b->alphaMask) &&
+#endif
+ (a->rgbBits == b->rgbBits) &&
+ (a->indexBits == b->indexBits) &&
+ (a->accumRedBits == b->accumRedBits) &&
+ (a->accumGreenBits == b->accumGreenBits) &&
+ (a->accumBlueBits == b->accumBlueBits) &&
+ (a->accumAlphaBits == b->accumAlphaBits) &&
+ (a->depthBits == b->depthBits) &&
+ (a->stencilBits == b->stencilBits) &&
+ (a->numAuxBuffers == b->numAuxBuffers) &&
+ (a->level == b->level) &&
+ (a->visualRating == b->visualRating) &&
+
+ (a->transparentPixel == b->transparentPixel) &&
+
+ ((a->transparentPixel != GLX_TRANSPARENT_RGB) ||
+ ((a->transparentRed == b->transparentRed) &&
+ (a->transparentGreen == b->transparentGreen) &&
+ (a->transparentBlue == b->transparentBlue) &&
+ (a->transparentAlpha == b->transparentAlpha))) &&
+
+ ((a->transparentPixel != GLX_TRANSPARENT_INDEX) ||
+ (a->transparentIndex == b->transparentIndex)) &&
+
+ (a->sampleBuffers == b->sampleBuffers) &&
+ (a->samples == b->samples) &&
+ ((a->drawableType & b->drawableType) != 0) &&
+ (a->renderType == b->renderType) &&
+ (a->maxPbufferWidth == b->maxPbufferWidth) &&
+ (a->maxPbufferHeight == b->maxPbufferHeight) &&
+ (a->maxPbufferPixels == b->maxPbufferPixels) &&
+ (a->optimalPbufferWidth == b->optimalPbufferWidth) &&
+ (a->optimalPbufferHeight == b->optimalPbufferHeight) &&
+ (a->swapMethod == b->swapMethod) &&
+ (a->bindToTextureRgb == b->bindToTextureRgb) &&
+ (a->bindToTextureRgba == b->bindToTextureRgba) &&
+ (a->bindToMipmapTexture == b->bindToMipmapTexture) &&
+ (a->bindToTextureTargets == b->bindToTextureTargets) &&
+ (a->yInverted == b->yInverted));
+}
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