comctl32/tests: Flush events before testing edit control IME messages.

[wine.git] / dlls / opengl32 / wgl.c

/* Window-specific OpenGL functions implementation.
 *
 * Copyright (c) 1999 Lionel Ulmer
 * Copyright (c) 2005 Raphael Junqueira
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "config.h"

#include <stdarg.h>
#include <stdlib.h>
#include <math.h>

#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winbase.h"
#include "winreg.h"
#include "ntuser.h"

#include "opengl_ext.h"

#include "unixlib.h"

#include "wine/glu.h"
#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(wgl);
WINE_DECLARE_DEBUG_CHANNEL(fps);

static const MAT2 identity = { {0,1},{0,0},{0,0},{0,1} };

/***********************************************************************
 *              wglGetCurrentReadDCARB
 *
 * Provided by the WGL_ARB_make_current_read extension.
 */
HDC WINAPI wglGetCurrentReadDCARB(void)
{
    struct wgl_handle *ptr = get_current_context_ptr();

    if (!ptr) return 0;
    return ptr->u.context->read_dc;
}

/***********************************************************************
 *              wglGetCurrentDC (OPENGL32.@)
 */
HDC WINAPI wglGetCurrentDC(void)
{
    struct wgl_handle *ptr = get_current_context_ptr();

    if (!ptr) return 0;
    return ptr->u.context->draw_dc;
}

/***********************************************************************
 *              wglGetCurrentContext (OPENGL32.@)
 */
HGLRC WINAPI wglGetCurrentContext(void)
{
    return NtCurrentTeb()->glCurrentRC;
}

/***********************************************************************
 *              wglChoosePixelFormat (OPENGL32.@)
 */
INT WINAPI wglChoosePixelFormat(HDC hdc, const PIXELFORMATDESCRIPTOR* ppfd)
{
    PIXELFORMATDESCRIPTOR format, best;
    int i, count, best_format;
    int bestDBuffer = -1, bestStereo = -1;

    TRACE_(wgl)( "%p %p: size %u version %u flags %u type %u color %u %u,%u,%u,%u "
                 "accum %u depth %u stencil %u aux %u\n",
                 hdc, ppfd, ppfd->nSize, ppfd->nVersion, ppfd->dwFlags, ppfd->iPixelType,
                 ppfd->cColorBits, ppfd->cRedBits, ppfd->cGreenBits, ppfd->cBlueBits, ppfd->cAlphaBits,
                 ppfd->cAccumBits, ppfd->cDepthBits, ppfd->cStencilBits, ppfd->cAuxBuffers );

    count = wglDescribePixelFormat( hdc, 0, 0, NULL );
    if (!count) return 0;

    best_format = 0;
    best.dwFlags = 0;
    best.cAlphaBits = -1;
    best.cColorBits = -1;
    best.cDepthBits = -1;
    best.cStencilBits = -1;
    best.cAuxBuffers = -1;

    for (i = 1; i <= count; i++)
    {
        if (!wglDescribePixelFormat( hdc, i, sizeof(format), &format )) continue;

        if ((ppfd->iPixelType == PFD_TYPE_COLORINDEX) != (format.iPixelType == PFD_TYPE_COLORINDEX))
        {
            TRACE( "pixel type mismatch for iPixelFormat=%d\n", i );
            continue;
        }

        /* only use bitmap capable for formats for bitmap rendering */
        if( (ppfd->dwFlags & PFD_DRAW_TO_BITMAP) != (format.dwFlags & PFD_DRAW_TO_BITMAP))
        {
            TRACE( "PFD_DRAW_TO_BITMAP mismatch for iPixelFormat=%d\n", i );
            continue;
        }

        /* The behavior of PDF_STEREO/PFD_STEREO_DONTCARE and PFD_DOUBLEBUFFER / PFD_DOUBLEBUFFER_DONTCARE
         * is not very clear on MSDN. They specify that ChoosePixelFormat tries to match pixel formats
         * with the flag (PFD_STEREO / PFD_DOUBLEBUFFERING) set. Otherwise it says that it tries to match
         * formats without the given flag set.
         * A test on Windows using a Radeon 9500pro on WinXP (the driver doesn't support Stereo)
         * has indicated that a format without stereo is returned when stereo is unavailable.
         * So in case PFD_STEREO is set, formats that support it should have priority above formats
         * without. In case PFD_STEREO_DONTCARE is set, stereo is ignored.
         *
         * To summarize the following is most likely the correct behavior:
         * stereo not set -> prefer non-stereo formats, but also accept stereo formats
         * stereo set -> prefer stereo formats, but also accept non-stereo formats
         * stereo don't care -> it doesn't matter whether we get stereo or not
         *
         * In Wine we will treat non-stereo the same way as don't care because it makes
         * format selection even more complicated and second drivers with Stereo advertise
         * each format twice anyway.
         */

        /* Doublebuffer, see the comments above */
        if (!(ppfd->dwFlags & PFD_DOUBLEBUFFER_DONTCARE))
        {
            if (((ppfd->dwFlags & PFD_DOUBLEBUFFER) != bestDBuffer) &&
                ((format.dwFlags & PFD_DOUBLEBUFFER) == (ppfd->dwFlags & PFD_DOUBLEBUFFER)))
                goto found;

            if (bestDBuffer != -1 && (format.dwFlags & PFD_DOUBLEBUFFER) != bestDBuffer) continue;
        }
        else if (!best_format)
            goto found;

        /* Stereo, see the comments above. */
        if (!(ppfd->dwFlags & PFD_STEREO_DONTCARE))
        {
            if (((ppfd->dwFlags & PFD_STEREO) != bestStereo) &&
                ((format.dwFlags & PFD_STEREO) == (ppfd->dwFlags & PFD_STEREO)))
                goto found;

            if (bestStereo != -1 && (format.dwFlags & PFD_STEREO) != bestStereo) continue;
        }
        else if (!best_format)
            goto found;

        /* Below we will do a number of checks to select the 'best' pixelformat.
         * We assume the precedence cColorBits > cAlphaBits > cDepthBits > cStencilBits -> cAuxBuffers.
         * The code works by trying to match the most important options as close as possible.
         * When a reasonable format is found, we will try to match more options.
         * It appears (see the opengl32 test) that Windows opengl drivers ignore options
         * like cColorBits, cAlphaBits and friends if they are set to 0, so they are considered
         * as DONTCARE. At least Serious Sam TSE relies on this behavior. */

        if (ppfd->cColorBits)
        {
            if (((ppfd->cColorBits > best.cColorBits) && (format.cColorBits > best.cColorBits)) ||
                ((format.cColorBits >= ppfd->cColorBits) && (format.cColorBits < best.cColorBits)))
                goto found;

            if (best.cColorBits != format.cColorBits)  /* Do further checks if the format is compatible */
            {
                TRACE( "color mismatch for iPixelFormat=%d\n", i );
                continue;
            }
        }
        if (ppfd->cAlphaBits)
        {
            if (((ppfd->cAlphaBits > best.cAlphaBits) && (format.cAlphaBits > best.cAlphaBits)) ||
                ((format.cAlphaBits >= ppfd->cAlphaBits) && (format.cAlphaBits < best.cAlphaBits)))
                goto found;

            if (best.cAlphaBits != format.cAlphaBits)
            {
                TRACE( "alpha mismatch for iPixelFormat=%d\n", i );
                continue;
            }
        }
        if (ppfd->cStencilBits)
        {
            if (((ppfd->cStencilBits > best.cStencilBits) && (format.cStencilBits > best.cStencilBits)) ||
                ((format.cStencilBits >= ppfd->cStencilBits) && (format.cStencilBits < best.cStencilBits)))
                goto found;

            if (best.cStencilBits != format.cStencilBits)
            {
                TRACE( "stencil mismatch for iPixelFormat=%d\n", i );
                continue;
            }
        }
        if (ppfd->cDepthBits && !(ppfd->dwFlags & PFD_DEPTH_DONTCARE))
        {
            if (((ppfd->cDepthBits > best.cDepthBits) && (format.cDepthBits > best.cDepthBits)) ||
                ((format.cDepthBits >= ppfd->cDepthBits) && (format.cDepthBits < best.cDepthBits)))
                goto found;

            if (best.cDepthBits != format.cDepthBits)
            {
                TRACE( "depth mismatch for iPixelFormat=%d\n", i );
                continue;
            }
        }
        if (ppfd->cAuxBuffers)
        {
            if (((ppfd->cAuxBuffers > best.cAuxBuffers) && (format.cAuxBuffers > best.cAuxBuffers)) ||
                ((format.cAuxBuffers >= ppfd->cAuxBuffers) && (format.cAuxBuffers < best.cAuxBuffers)))
                goto found;

            if (best.cAuxBuffers != format.cAuxBuffers)
            {
                TRACE( "aux mismatch for iPixelFormat=%d\n", i );
                continue;
            }
        }
        if (ppfd->dwFlags & PFD_DEPTH_DONTCARE && format.cDepthBits < best.cDepthBits)
            goto found;

        continue;

    found:
        best_format = i;
        best = format;
        bestDBuffer = format.dwFlags & PFD_DOUBLEBUFFER;
        bestStereo = format.dwFlags & PFD_STEREO;
    }

    TRACE( "returning %u\n", best_format );
    return best_format;
}

/***********************************************************************
 *              wglGetPixelFormat (OPENGL32.@)
 */
INT WINAPI wglGetPixelFormat(HDC hdc)
{
    struct wglGetPixelFormat_params args = { .hdc = hdc, };
    NTSTATUS status;

    TRACE( "hdc %p\n", hdc );

    if ((status = UNIX_CALL( wglGetPixelFormat, &args )))
    {
        WARN( "wglGetPixelFormat returned %#x\n", status );
        SetLastError( ERROR_INVALID_PIXEL_FORMAT );
    }

    return args.ret;
}

/***********************************************************************
 *              wglSwapBuffers (OPENGL32.@)
 */
BOOL WINAPI DECLSPEC_HOTPATCH wglSwapBuffers( HDC hdc )
{
    struct wglSwapBuffers_params args = { .hdc = hdc, };
    NTSTATUS status;

    if ((status = UNIX_CALL( wglSwapBuffers, &args ))) WARN( "wglSwapBuffers returned %#x\n", status );
    else if (TRACE_ON(fps))
    {
        static long prev_time, start_time;
        static unsigned long frames, frames_total;

        DWORD time = GetTickCount();
        frames++;
        frames_total++;
        /* every 1.5 seconds */
        if (time - prev_time > 1500)
        {
            TRACE_(fps)("@ approx %.2ffps, total %.2ffps\n",
                        1000.0*frames/(time - prev_time), 1000.0*frames_total/(time - start_time));
            prev_time = time;
            frames = 0;
            if (start_time == 0) start_time = time;
        }
    }

    return args.ret;
}

/***********************************************************************
 *              wglCreateLayerContext (OPENGL32.@)
 */
HGLRC WINAPI wglCreateLayerContext( HDC hdc, int iLayerPlane )
{
    TRACE("(%p,%d)\n", hdc, iLayerPlane);

    if (iLayerPlane == 0) return wglCreateContext( hdc );

    FIXME("no handler for layer %d\n", iLayerPlane);
    return NULL;
}

/***********************************************************************
 *              wglDescribeLayerPlane (OPENGL32.@)
 */
BOOL WINAPI wglDescribeLayerPlane(HDC hdc,
                                  int iPixelFormat,
                                  int iLayerPlane,
                                  UINT nBytes,
                                  LPLAYERPLANEDESCRIPTOR plpd) {
  FIXME("(%p,%d,%d,%d,%p)\n", hdc, iPixelFormat, iLayerPlane, nBytes, plpd);

  return FALSE;
}

/***********************************************************************
 *              wglGetLayerPaletteEntries (OPENGL32.@)
 */
int WINAPI wglGetLayerPaletteEntries(HDC hdc,
                                     int iLayerPlane,
                                     int iStart,
                                     int cEntries,
                                     const COLORREF *pcr) {
  FIXME("(): stub!\n");

  return 0;
}

/* check if the extension is present in the list */
static BOOL has_extension( const char *list, const char *ext, size_t len )
{
    while (list)
    {
        while (*list == ' ') list++;
        if (!strncmp( list, ext, len ) && (!list[len] || list[len] == ' ')) return TRUE;
        list = strchr( list, ' ' );
    }
    return FALSE;
}

static GLubyte *filter_extensions_list( const char *extensions, const char *disabled )
{
    const char *end;
    char *p, *str;

    p = str = HeapAlloc( GetProcessHeap(), 0, strlen( extensions ) + 2 );
    if (!str) return NULL;

    TRACE( "GL_EXTENSIONS:\n" );

    for (;;)
    {
        while (*extensions == ' ') extensions++;
        if (!*extensions) break;

        if (!(end = strchr( extensions, ' ' ))) end = extensions + strlen( extensions );
        memcpy( p, extensions, end - extensions );
        p[end - extensions] = 0;

        if (!has_extension( disabled, p, strlen( p ) ))
        {
            TRACE( "++ %s\n", p );
            p += end - extensions;
            *p++ = ' ';
        }
        else
        {
            TRACE( "-- %s (disabled by config)\n", p );
        }
        extensions = end;
    }
    *p = 0;
    return (GLubyte *)str;
}

static GLuint *filter_extensions_index( const char *disabled )
{
    const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
    GLuint *disabled_index;
    GLint extensions_count;
    unsigned int i = 0, j;
    const char *ext;

    if (!funcs->ext.p_glGetStringi)
    {
        void **func_ptr = (void **)&funcs->ext.p_glGetStringi;
        *func_ptr = funcs->wgl.p_wglGetProcAddress( "glGetStringi" );
        if (!funcs->ext.p_glGetStringi) return NULL;
    }

    funcs->gl.p_glGetIntegerv( GL_NUM_EXTENSIONS, &extensions_count );
    disabled_index = HeapAlloc( GetProcessHeap(), 0, extensions_count * sizeof(*disabled_index) );
    if (!disabled_index) return NULL;

    TRACE( "GL_EXTENSIONS:\n" );

    for (j = 0; j < extensions_count; ++j)
    {
        ext = (const char *)funcs->ext.p_glGetStringi( GL_EXTENSIONS, j );
        if (!has_extension( disabled, ext, strlen( ext ) ))
        {
            TRACE( "++ %s\n", ext );
        }
        else
        {
            TRACE( "-- %s (disabled by config)\n", ext );
            disabled_index[i++] = j;
        }
    }

    disabled_index[i] = ~0u;
    return disabled_index;
}

/* build the extension string by filtering out the disabled extensions */
static BOOL filter_extensions( const char *extensions, GLubyte **exts_list, GLuint **disabled_exts )
{
    static const char *disabled;

    if (!disabled)
    {
        HKEY hkey;
        DWORD size;
        char *str = NULL;

        /* @@ Wine registry key: HKCU\Software\Wine\OpenGL */
        if (!RegOpenKeyA( HKEY_CURRENT_USER, "Software\\Wine\\OpenGL", &hkey ))
        {
            if (!RegQueryValueExA( hkey, "DisabledExtensions", 0, NULL, NULL, &size ))
            {
                str = HeapAlloc( GetProcessHeap(), 0, size );
                if (RegQueryValueExA( hkey, "DisabledExtensions", 0, NULL, (BYTE *)str, &size )) *str = 0;
            }
            RegCloseKey( hkey );
        }
        if (str)
        {
            if (InterlockedCompareExchangePointer( (void **)&disabled, str, NULL ))
                HeapFree( GetProcessHeap(), 0, str );
        }
        else disabled = "";
    }

    if (!disabled[0]) return FALSE;
    if (extensions && !*exts_list) *exts_list = filter_extensions_list( extensions, disabled );
    if (!*disabled_exts) *disabled_exts = filter_extensions_index( disabled );
    return (exts_list && *exts_list) || *disabled_exts;
}

void WINAPI glGetIntegerv(GLenum pname, GLint *data)
{
    struct glGetIntegerv_params args = { .pname = pname, .data = data, };
    NTSTATUS status;

    TRACE( "pname %d, data %p\n", pname, data );

    if (pname == GL_NUM_EXTENSIONS)
    {
        struct wgl_handle *ptr = get_current_context_ptr();
        GLuint **disabled = &ptr->u.context->disabled_exts;

        if (*disabled || filter_extensions( NULL, NULL, disabled ))
        {
            const GLuint *disabled_exts = *disabled;
            GLint count, disabled_count = 0;

            args.data = &count;
            if ((status = UNIX_CALL( glGetIntegerv, &args ))) WARN( "glGetIntegerv returned %#x\n", status );

            while (*disabled_exts++ != ~0u)
                disabled_count++;
            *data = count - disabled_count;
            return;
        }
    }

    if ((status = UNIX_CALL( glGetIntegerv, &args ))) WARN( "glGetIntegerv returned %#x\n", status );
}

const GLubyte * WINAPI glGetStringi(GLenum name, GLuint index)
{
    const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;

    TRACE("(%d, %d)\n", name, index);
    if (!funcs->ext.p_glGetStringi)
    {
        void **func_ptr = (void **)&funcs->ext.p_glGetStringi;

        *func_ptr = funcs->wgl.p_wglGetProcAddress("glGetStringi");
    }

    if (name == GL_EXTENSIONS)
    {
        struct wgl_handle *ptr = get_current_context_ptr();

        if (ptr->u.context->disabled_exts ||
            filter_extensions(NULL, NULL, &ptr->u.context->disabled_exts))
        {
            const GLuint *disabled_exts = ptr->u.context->disabled_exts;
            unsigned int disabled_count = 0;

            while (index + disabled_count >= *disabled_exts++)
                disabled_count++;
            return funcs->ext.p_glGetStringi(name, index + disabled_count);
        }
    }
    return funcs->ext.p_glGetStringi(name, index);
}

static int compar(const void *elt_a, const void *elt_b) {
  return strcmp(((const OpenGL_extension *) elt_a)->name,
                ((const OpenGL_extension *) elt_b)->name);
}

/* Check if a GL extension is supported */
static BOOL check_extension_support( const char *extension, const char *available_extensions )
{
    const struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
    size_t len;

    TRACE("Checking for extension '%s'\n", extension);

    /* We use the GetProcAddress function from the display driver to retrieve function pointers
     * for OpenGL and WGL extensions. In case of winex11.drv the OpenGL extension lookup is done
     * using glXGetProcAddress. This function is quite unreliable in the sense that its specs don't
     * require the function to return NULL when an extension isn't found. For this reason we check
     * if the OpenGL extension required for the function we are looking up is supported. */

    while ((len = strcspn( extension, " " )))
    {
        /* Check if the extension is part of the GL extension string to see if it is supported. */
        if (has_extension( available_extensions, extension, len )) return TRUE;

        /* In general an OpenGL function starts as an ARB/EXT extension and at some stage
         * it becomes part of the core OpenGL library and can be reached without the ARB/EXT
         * suffix as well. In the extension table, these functions contain GL_VERSION_major_minor.
         * Check if we are searching for a core GL function */
        if (!strncmp( extension, "GL_VERSION_", 11 ))
        {
            const GLubyte *gl_version = funcs->gl.p_glGetString(GL_VERSION);
            const char *version = extension + 11; /* Move past 'GL_VERSION_' */

            if (!gl_version)
            {
                ERR( "No OpenGL version found!\n" );
                return FALSE;
            }

            /* Compare the major/minor version numbers of the native OpenGL library and what is required by the function.
             * The gl_version string is guaranteed to have at least a major/minor and sometimes it has a release number as well. */
            if ((gl_version[0] > version[0]) || ((gl_version[0] == version[0]) && (gl_version[2] >= version[2]))) return TRUE;

            WARN( "The function requires OpenGL version '%c.%c' while your drivers only provide '%c.%c'\n",
                  version[0], version[2], gl_version[0], gl_version[2] );
        }

        if (extension[len] == ' ') len++;
        extension += len;
    }

    return FALSE;
}

static char *build_extension_list(void)
{
    GLint len = 0, capacity, i, extensions_count;
    char *extension, *tmp, *available_extensions;

    glGetIntegerv( GL_NUM_EXTENSIONS, &extensions_count );
    capacity = 128 * extensions_count;

    if (!(available_extensions = HeapAlloc( GetProcessHeap(), 0, capacity ))) return NULL;
    for (i = 0; i < extensions_count; ++i)
    {
        extension = (char *)glGetStringi( GL_EXTENSIONS, i );
        capacity = max( capacity, len + strlen( extension ) + 2 );
        if (!(tmp = HeapReAlloc( GetProcessHeap(), 0, available_extensions, capacity ))) break;
        available_extensions = tmp;
        len += sprintf( available_extensions + len, "%s ", extension );
    }
    if (len) available_extensions[len - 1] = 0;

    return available_extensions;
}

static char *heap_strdup( const char *str )
{
    int len = strlen( str ) + 1;
    char *ret = HeapAlloc( GetProcessHeap(), 0, len );
    memcpy( ret, str, len );
    return ret;
}

/* Check if a GL extension is supported */
static BOOL is_extension_supported( const char *extension )
{
    enum wgl_handle_type type = get_current_context_type();
    char *available_extensions = NULL;
    BOOL ret = FALSE;

    if (type == HANDLE_CONTEXT) available_extensions = heap_strdup( (const char *)glGetString( GL_EXTENSIONS ) );
    if (!available_extensions) available_extensions = build_extension_list();

    if (!available_extensions) ERR( "No OpenGL extensions found, check if your OpenGL setup is correct!\n" );
    else ret = check_extension_support( extension, available_extensions );

    HeapFree( GetProcessHeap(), 0, available_extensions );
    return ret;
}

/***********************************************************************
 *              wglGetProcAddress (OPENGL32.@)
 */
PROC WINAPI wglGetProcAddress( LPCSTR name )
{
    struct opengl_funcs *funcs = NtCurrentTeb()->glTable;
    void **func_ptr;
    OpenGL_extension  ext;
    const OpenGL_extension *ext_ret;

    if (!name) return NULL;

    /* Without an active context opengl32 doesn't know to what
     * driver it has to dispatch wglGetProcAddress.
     */
    if (!get_current_context_ptr())
    {
        WARN("No active WGL context found\n");
        return NULL;
    }

    ext.name = name;
    ext_ret = bsearch(&ext, extension_registry, extension_registry_size, sizeof(ext), compar);
    if (!ext_ret)
    {
        WARN("Function %s unknown\n", name);
        return NULL;
    }

    func_ptr = (void **)&funcs->ext + (ext_ret - extension_registry);
    if (!*func_ptr)
    {
        void *driver_func = funcs->wgl.p_wglGetProcAddress( name );

        if (!is_extension_supported(ext_ret->extension))
        {
            unsigned int i;
            static const struct { const char *name, *alt; } alternatives[] =
            {
                { "glCopyTexSubImage3DEXT", "glCopyTexSubImage3D" },     /* needed by RuneScape */
                { "glVertexAttribDivisor", "glVertexAttribDivisorARB"},  /* needed by Caffeine */
            };

            for (i = 0; i < ARRAY_SIZE(alternatives); i++)
            {
                if (strcmp( name, alternatives[i].name )) continue;
                WARN("Extension %s required for %s not supported, trying %s\n",
                    ext_ret->extension, name, alternatives[i].alt );
                return wglGetProcAddress( alternatives[i].alt );
            }
            WARN("Extension %s required for %s not supported\n", ext_ret->extension, name);
            return NULL;
        }

        if (driver_func == NULL)
        {
            WARN("Function %s not supported by driver\n", name);
            return NULL;
        }
        *func_ptr = driver_func;
    }

    TRACE("returning %s -> %p\n", name, ext_ret->func);
    return ext_ret->func;
}

/***********************************************************************
 *              wglRealizeLayerPalette (OPENGL32.@)
 */
BOOL WINAPI wglRealizeLayerPalette(HDC hdc,
                                   int iLayerPlane,
                                   BOOL bRealize) {
  FIXME("()\n");

  return FALSE;
}

/***********************************************************************
 *              wglSetLayerPaletteEntries (OPENGL32.@)
 */
int WINAPI wglSetLayerPaletteEntries(HDC hdc,
                                     int iLayerPlane,
                                     int iStart,
                                     int cEntries,
                                     const COLORREF *pcr) {
  FIXME("(): stub!\n");

  return 0;
}

/***********************************************************************
 *              wglGetDefaultProcAddress (OPENGL32.@)
 */
PROC WINAPI wglGetDefaultProcAddress( LPCSTR name )
{
    FIXME( "%s: stub\n", debugstr_a(name));
    return NULL;
}

/***********************************************************************
 *              wglSwapLayerBuffers (OPENGL32.@)
 */
BOOL WINAPI wglSwapLayerBuffers(HDC hdc,
                                UINT fuPlanes) {
  TRACE("(%p, %08x)\n", hdc, fuPlanes);

  if (fuPlanes & WGL_SWAP_MAIN_PLANE) {
    if (!wglSwapBuffers( hdc )) return FALSE;
    fuPlanes &= ~WGL_SWAP_MAIN_PLANE;
  }

  if (fuPlanes) {
    WARN("Following layers unhandled: %08x\n", fuPlanes);
  }

  return TRUE;
}

/***********************************************************************
 *              wglUseFontBitmaps_common
 */
static BOOL wglUseFontBitmaps_common( HDC hdc, DWORD first, DWORD count, DWORD listBase, BOOL unicode )
{
     GLYPHMETRICS gm;
     unsigned int glyph, size = 0;
     void *bitmap = NULL, *gl_bitmap = NULL;
     int org_alignment;
     BOOL ret = TRUE;

     glGetIntegerv( GL_UNPACK_ALIGNMENT, &org_alignment );
     glPixelStorei( GL_UNPACK_ALIGNMENT, 4 );

     for (glyph = first; glyph < first + count; glyph++) {
         unsigned int needed_size, height, width, width_int;

         if (unicode)
             needed_size = GetGlyphOutlineW(hdc, glyph, GGO_BITMAP, &gm, 0, NULL, &identity);
         else
             needed_size = GetGlyphOutlineA(hdc, glyph, GGO_BITMAP, &gm, 0, NULL, &identity);

         TRACE("Glyph: %3d / List: %d size %d\n", glyph, listBase, needed_size);
         if (needed_size == GDI_ERROR) {
             ret = FALSE;
             break;
         }

         if (needed_size > size) {
             size = needed_size;
             HeapFree(GetProcessHeap(), 0, bitmap);
             HeapFree(GetProcessHeap(), 0, gl_bitmap);
             bitmap = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
             gl_bitmap = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, size);
         }
         if (needed_size != 0) {
             if (unicode)
                 ret = (GetGlyphOutlineW(hdc, glyph, GGO_BITMAP, &gm,
                                         size, bitmap, &identity) != GDI_ERROR);
             else
                 ret = (GetGlyphOutlineA(hdc, glyph, GGO_BITMAP, &gm,
                                         size, bitmap, &identity) != GDI_ERROR);
             if (!ret) break;
         }

         if (TRACE_ON(wgl)) {
             unsigned int bitmask;
             unsigned char *bitmap_ = bitmap;

             TRACE("  - bbox: %d x %d\n", gm.gmBlackBoxX, gm.gmBlackBoxY);
             TRACE("  - origin: (%d, %d)\n", gm.gmptGlyphOrigin.x, gm.gmptGlyphOrigin.y);
             TRACE("  - increment: %d - %d\n", gm.gmCellIncX, gm.gmCellIncY);
             if (needed_size != 0) {
                 TRACE("  - bitmap:\n");
                 for (height = 0; height < gm.gmBlackBoxY; height++) {
                     TRACE("      ");
                     for (width = 0, bitmask = 0x80; width < gm.gmBlackBoxX; width++, bitmask >>= 1) {
                         if (bitmask == 0) {
                             bitmap_ += 1;
                             bitmask = 0x80;
                         }
                         if (*bitmap_ & bitmask)
                             TRACE("*");
                         else
                             TRACE(" ");
                     }
                     bitmap_ += (4 - ((UINT_PTR)bitmap_ & 0x03));
                     TRACE("\n");
                 }
             }
         }

         /* In OpenGL, the bitmap is drawn from the bottom to the top... So we need to invert the
         * glyph for it to be drawn properly.
         */
         if (needed_size != 0) {
             width_int = (gm.gmBlackBoxX + 31) / 32;
             for (height = 0; height < gm.gmBlackBoxY; height++) {
                 for (width = 0; width < width_int; width++) {
                     ((int *) gl_bitmap)[(gm.gmBlackBoxY - height - 1) * width_int + width] =
                     ((int *) bitmap)[height * width_int + width];
                 }
             }
         }

         glNewList( listBase++, GL_COMPILE );
         if (needed_size != 0) {
             glBitmap( gm.gmBlackBoxX, gm.gmBlackBoxY, 0 - gm.gmptGlyphOrigin.x,
                       (int)gm.gmBlackBoxY - gm.gmptGlyphOrigin.y, gm.gmCellIncX, gm.gmCellIncY, gl_bitmap );
         } else {
             /* This is the case of 'empty' glyphs like the space character */
             glBitmap( 0, 0, 0, 0, gm.gmCellIncX, gm.gmCellIncY, NULL );
         }
         glEndList();
     }

     glPixelStorei( GL_UNPACK_ALIGNMENT, org_alignment );
     HeapFree(GetProcessHeap(), 0, bitmap);
     HeapFree(GetProcessHeap(), 0, gl_bitmap);
     return ret;
}

/***********************************************************************
 *              wglUseFontBitmapsA (OPENGL32.@)
 */
BOOL WINAPI wglUseFontBitmapsA(HDC hdc, DWORD first, DWORD count, DWORD listBase)
{
    return wglUseFontBitmaps_common( hdc, first, count, listBase, FALSE );
}

/***********************************************************************
 *              wglUseFontBitmapsW (OPENGL32.@)
 */
BOOL WINAPI wglUseFontBitmapsW(HDC hdc, DWORD first, DWORD count, DWORD listBase)
{
    return wglUseFontBitmaps_common( hdc, first, count, listBase, TRUE );
}

static void fixed_to_double(POINTFX fixed, UINT em_size, GLdouble vertex[3])
{
    vertex[0] = (fixed.x.value + (GLdouble)fixed.x.fract / (1 << 16)) / em_size;
    vertex[1] = (fixed.y.value + (GLdouble)fixed.y.fract / (1 << 16)) / em_size;
    vertex[2] = 0.0;
}

typedef struct _bezier_vector {
    GLdouble x;
    GLdouble y;
} bezier_vector;

static double bezier_deviation_squared(const bezier_vector *p)
{
    bezier_vector deviation;
    bezier_vector vertex;
    bezier_vector base;
    double base_length;
    double dot;

    vertex.x = (p[0].x + p[1].x*2 + p[2].x)/4 - p[0].x;
    vertex.y = (p[0].y + p[1].y*2 + p[2].y)/4 - p[0].y;

    base.x = p[2].x - p[0].x;
    base.y = p[2].y - p[0].y;

    base_length = sqrt(base.x*base.x + base.y*base.y);
    base.x /= base_length;
    base.y /= base_length;

    dot = base.x*vertex.x + base.y*vertex.y;
    dot = min(max(dot, 0.0), base_length);
    base.x *= dot;
    base.y *= dot;

    deviation.x = vertex.x-base.x;
    deviation.y = vertex.y-base.y;

    return deviation.x*deviation.x + deviation.y*deviation.y;
}

static int bezier_approximate(const bezier_vector *p, bezier_vector *points, FLOAT deviation)
{
    bezier_vector first_curve[3];
    bezier_vector second_curve[3];
    bezier_vector vertex;
    int total_vertices;

    if(bezier_deviation_squared(p) <= deviation*deviation)
    {
        if(points)
            *points = p[2];
        return 1;
    }

    vertex.x = (p[0].x + p[1].x*2 + p[2].x)/4;
    vertex.y = (p[0].y + p[1].y*2 + p[2].y)/4;

    first_curve[0] = p[0];
    first_curve[1].x = (p[0].x + p[1].x)/2;
    first_curve[1].y = (p[0].y + p[1].y)/2;
    first_curve[2] = vertex;

    second_curve[0] = vertex;
    second_curve[1].x = (p[2].x + p[1].x)/2;
    second_curve[1].y = (p[2].y + p[1].y)/2;
    second_curve[2] = p[2];

    total_vertices = bezier_approximate(first_curve, points, deviation);
    if(points)
        points += total_vertices;
    total_vertices += bezier_approximate(second_curve, points, deviation);
    return total_vertices;
}

/***********************************************************************
 *              wglUseFontOutlines_common
 */
static BOOL wglUseFontOutlines_common(HDC hdc,
                                      DWORD first,
                                      DWORD count,
                                      DWORD listBase,
                                      FLOAT deviation,
                                      FLOAT extrusion,
                                      int format,
                                      LPGLYPHMETRICSFLOAT lpgmf,
                                      BOOL unicode)
{
    UINT glyph;
    GLUtesselator *tess = NULL;
    LOGFONTW lf;
    HFONT old_font, unscaled_font;
    UINT em_size = 1024;
    RECT rc;

    TRACE("(%p, %d, %d, %d, %f, %f, %d, %p, %s)\n", hdc, first, count,
          listBase, deviation, extrusion, format, lpgmf, unicode ? "W" : "A");

    if(deviation <= 0.0)
        deviation = 1.0/em_size;

    if(format == WGL_FONT_POLYGONS)
    {
        tess = gluNewTess();
        if(!tess)
        {
            ERR("glu32 is required for this function but isn't available\n");
            return FALSE;
        }
        gluTessCallback( tess, GLU_TESS_VERTEX, (void *)glVertex3dv );
        gluTessCallback( tess, GLU_TESS_BEGIN, (void *)glBegin );
        gluTessCallback( tess, GLU_TESS_END, glEnd );
    }

    GetObjectW(GetCurrentObject(hdc, OBJ_FONT), sizeof(lf), &lf);
    rc.left = rc.right = rc.bottom = 0;
    rc.top = em_size;
    DPtoLP(hdc, (POINT*)&rc, 2);
    lf.lfHeight = -abs(rc.top - rc.bottom);
    lf.lfOrientation = lf.lfEscapement = 0;
    unscaled_font = CreateFontIndirectW(&lf);
    old_font = SelectObject(hdc, unscaled_font);

    for (glyph = first; glyph < first + count; glyph++)
    {
        DWORD needed;
        GLYPHMETRICS gm;
        BYTE *buf;
        TTPOLYGONHEADER *pph;
        TTPOLYCURVE *ppc;
        GLdouble *vertices = NULL;
        int vertex_total = -1;

        if(unicode)
            needed = GetGlyphOutlineW(hdc, glyph, GGO_NATIVE, &gm, 0, NULL, &identity);
        else
            needed = GetGlyphOutlineA(hdc, glyph, GGO_NATIVE, &gm, 0, NULL, &identity);

        if(needed == GDI_ERROR)
            goto error;

        buf = HeapAlloc(GetProcessHeap(), 0, needed);

        if(unicode)
            GetGlyphOutlineW(hdc, glyph, GGO_NATIVE, &gm, needed, buf, &identity);
        else
            GetGlyphOutlineA(hdc, glyph, GGO_NATIVE, &gm, needed, buf, &identity);

        TRACE("glyph %d\n", glyph);

        if(lpgmf)
        {
            lpgmf->gmfBlackBoxX = (float)gm.gmBlackBoxX / em_size;
            lpgmf->gmfBlackBoxY = (float)gm.gmBlackBoxY / em_size;
            lpgmf->gmfptGlyphOrigin.x = (float)gm.gmptGlyphOrigin.x / em_size;
            lpgmf->gmfptGlyphOrigin.y = (float)gm.gmptGlyphOrigin.y / em_size;
            lpgmf->gmfCellIncX = (float)gm.gmCellIncX / em_size;
            lpgmf->gmfCellIncY = (float)gm.gmCellIncY / em_size;

            TRACE("%fx%f at %f,%f inc %f,%f\n", lpgmf->gmfBlackBoxX, lpgmf->gmfBlackBoxY,
                  lpgmf->gmfptGlyphOrigin.x, lpgmf->gmfptGlyphOrigin.y, lpgmf->gmfCellIncX, lpgmf->gmfCellIncY);
            lpgmf++;
        }

        glNewList( listBase++, GL_COMPILE );
        glFrontFace( GL_CCW );
        if(format == WGL_FONT_POLYGONS)
        {
            glNormal3d( 0.0, 0.0, 1.0 );
            gluTessNormal(tess, 0, 0, 1);
            gluTessBeginPolygon(tess, NULL);
        }

        while(!vertices)
        {
            if(vertex_total != -1)
                vertices = HeapAlloc(GetProcessHeap(), 0, vertex_total * 3 * sizeof(GLdouble));
            vertex_total = 0;

            pph = (TTPOLYGONHEADER*)buf;
            while((BYTE*)pph < buf + needed)
            {
                GLdouble previous[3];
                fixed_to_double(pph->pfxStart, em_size, previous);

                if(vertices)
                    TRACE("\tstart %d, %d\n", pph->pfxStart.x.value, pph->pfxStart.y.value);

                if (format == WGL_FONT_POLYGONS) gluTessBeginContour( tess );
                else glBegin( GL_LINE_LOOP );

                if(vertices)
                {
                    fixed_to_double(pph->pfxStart, em_size, vertices);
                    if (format == WGL_FONT_POLYGONS) gluTessVertex( tess, vertices, vertices );
                    else glVertex3d( vertices[0], vertices[1], vertices[2] );
                    vertices += 3;
                }
                vertex_total++;

                ppc = (TTPOLYCURVE*)((char*)pph + sizeof(*pph));
                while((char*)ppc < (char*)pph + pph->cb)
                {
                    int i, j;
                    int num;

                    switch(ppc->wType) {
                    case TT_PRIM_LINE:
                        for(i = 0; i < ppc->cpfx; i++)
                        {
                            if(vertices)
                            {
                                TRACE("\t\tline to %d, %d\n",
                                      ppc->apfx[i].x.value, ppc->apfx[i].y.value);
                                fixed_to_double(ppc->apfx[i], em_size, vertices);
                                if (format == WGL_FONT_POLYGONS) gluTessVertex( tess, vertices, vertices );
                                else glVertex3d( vertices[0], vertices[1], vertices[2] );
                                vertices += 3;
                            }
                            fixed_to_double(ppc->apfx[i], em_size, previous);
                            vertex_total++;
                        }
                        break;

                    case TT_PRIM_QSPLINE:
                        for(i = 0; i < ppc->cpfx-1; i++)
                        {
                            bezier_vector curve[3];
                            bezier_vector *points;
                            GLdouble curve_vertex[3];

                            if(vertices)
                                TRACE("\t\tcurve  %d,%d %d,%d\n",
                                      ppc->apfx[i].x.value,     ppc->apfx[i].y.value,
                                      ppc->apfx[i + 1].x.value, ppc->apfx[i + 1].y.value);

                            curve[0].x = previous[0];
                            curve[0].y = previous[1];
                            fixed_to_double(ppc->apfx[i], em_size, curve_vertex);
                            curve[1].x = curve_vertex[0];
                            curve[1].y = curve_vertex[1];
                            fixed_to_double(ppc->apfx[i + 1], em_size, curve_vertex);
                            curve[2].x = curve_vertex[0];
                            curve[2].y = curve_vertex[1];
                            if(i < ppc->cpfx-2)
                            {
                                curve[2].x = (curve[1].x + curve[2].x)/2;
                                curve[2].y = (curve[1].y + curve[2].y)/2;
                            }
                            num = bezier_approximate(curve, NULL, deviation);
                            points = HeapAlloc(GetProcessHeap(), 0, num*sizeof(bezier_vector));
                            num = bezier_approximate(curve, points, deviation);
                            vertex_total += num;
                            if(vertices)
                            {
                                for(j=0; j<num; j++)
                                {
                                    TRACE("\t\t\tvertex at %f,%f\n", points[j].x, points[j].y);
                                    vertices[0] = points[j].x;
                                    vertices[1] = points[j].y;
                                    vertices[2] = 0.0;
                                    if (format == WGL_FONT_POLYGONS) gluTessVertex( tess, vertices, vertices );
                                    else glVertex3d( vertices[0], vertices[1], vertices[2] );
                                    vertices += 3;
                                }
                            }
                            HeapFree(GetProcessHeap(), 0, points);
                            previous[0] = curve[2].x;
                            previous[1] = curve[2].y;
                        }
                        break;
                    default:
                        ERR("\t\tcurve type = %d\n", ppc->wType);
                        if (format == WGL_FONT_POLYGONS) gluTessEndContour( tess );
                        else glEnd();
                        goto error_in_list;
                    }

                    ppc = (TTPOLYCURVE*)((char*)ppc + sizeof(*ppc) +
                                         (ppc->cpfx - 1) * sizeof(POINTFX));
                }
                if (format == WGL_FONT_POLYGONS) gluTessEndContour( tess );
                else glEnd();
                pph = (TTPOLYGONHEADER*)((char*)pph + pph->cb);
            }
        }

error_in_list:
        if (format == WGL_FONT_POLYGONS) gluTessEndPolygon( tess );
        glTranslated( (GLdouble)gm.gmCellIncX / em_size, (GLdouble)gm.gmCellIncY / em_size, 0.0 );
        glEndList();
        HeapFree(GetProcessHeap(), 0, buf);
        HeapFree(GetProcessHeap(), 0, vertices);
    }

 error:
    DeleteObject(SelectObject(hdc, old_font));
    if(format == WGL_FONT_POLYGONS)
        gluDeleteTess(tess);
    return TRUE;

}

/***********************************************************************
 *              wglUseFontOutlinesA (OPENGL32.@)
 */
BOOL WINAPI wglUseFontOutlinesA(HDC hdc,
                                DWORD first,
                                DWORD count,
                                DWORD listBase,
                                FLOAT deviation,
                                FLOAT extrusion,
                                int format,
                                LPGLYPHMETRICSFLOAT lpgmf)
{
    return wglUseFontOutlines_common(hdc, first, count, listBase, deviation, extrusion, format, lpgmf, FALSE);
}

/***********************************************************************
 *              wglUseFontOutlinesW (OPENGL32.@)
 */
BOOL WINAPI wglUseFontOutlinesW(HDC hdc,
                                DWORD first,
                                DWORD count,
                                DWORD listBase,
                                FLOAT deviation,
                                FLOAT extrusion,
                                int format,
                                LPGLYPHMETRICSFLOAT lpgmf)
{
    return wglUseFontOutlines_common(hdc, first, count, listBase, deviation, extrusion, format, lpgmf, TRUE);
}

/***********************************************************************
 *              glDebugEntry (OPENGL32.@)
 */
GLint WINAPI glDebugEntry( GLint unknown1, GLint unknown2 )
{
    return 0;
}

/***********************************************************************
 *              glGetString (OPENGL32.@)
 */
const GLubyte * WINAPI glGetString( GLenum name )
{
    struct glGetString_params args = { .name = name, };
    NTSTATUS status;

    TRACE( "name %d\n", name );

    if ((status = UNIX_CALL( glGetString, &args ))) WARN( "glGetString returned %#x\n", status );

    if (name == GL_EXTENSIONS && args.ret)
    {
        struct wgl_handle *ptr = get_current_context_ptr();
        GLubyte **extensions = &ptr->u.context->extensions;
        GLuint **disabled = &ptr->u.context->disabled_exts;
        if (*extensions || filter_extensions( (const char *)args.ret, extensions, disabled )) return *extensions;
    }

    return args.ret;
}

static BOOL WINAPI call_opengl_debug_message_callback( struct wine_gl_debug_message_params *params, ULONG size )
{
    params->user_callback( params->source, params->type, params->id, params->severity,
                           params->length, params->message, params->user_data );
    return TRUE;
}

/***********************************************************************
 *           OpenGL initialisation routine
 */
BOOL WINAPI DllMain( HINSTANCE hinst, DWORD reason, LPVOID reserved )
{
    void **kernel_callback_table;

    switch(reason)
    {
    case DLL_PROCESS_ATTACH:
        NtCurrentTeb()->glTable = &null_opengl_funcs;

        kernel_callback_table = NtCurrentTeb()->Peb->KernelCallbackTable;
        kernel_callback_table[NtUserCallOpenGLDebugMessageCallback] = call_opengl_debug_message_callback;
        break;
    case DLL_THREAD_ATTACH:
        NtCurrentTeb()->glTable = &null_opengl_funcs;
        break;
    }
    return TRUE;
}