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wine/dlls/wined3d/gl_compat.c

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/*
* Compatibility functions for older GL implementations
*
* Copyright 2008 Stefan Dösinger for CodeWeavers
*
* 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 "wine/port.h"
#include <stdio.h>
#ifdef HAVE_FLOAT_H
# include <float.h>
#endif
#include "wined3d_private.h"
WINE_DEFAULT_DEBUG_CHANNEL(gl_compat);
WINE_DECLARE_DEBUG_CHANNEL(d3d_perf);
/* Start GL_ARB_multitexture emulation */
static void WINE_GLAPI wine_glMultiTexCoord1fARB(GLenum target, GLfloat s) {
if(target != GL_TEXTURE0) {
ERR("Texture unit > 0 used, but GL_ARB_multitexture is not supported\n");
return;
}
context_get_current()->gl_info->gl_ops.gl.p_glTexCoord1f(s);
}
static void WINE_GLAPI wine_glMultiTexCoord1fvARB(GLenum target, const GLfloat *v) {
if(target != GL_TEXTURE0) {
ERR("Texture unit > 0 used, but GL_ARB_multitexture is not supported\n");
return;
}
context_get_current()->gl_info->gl_ops.gl.p_glTexCoord1fv(v);
}
static void WINE_GLAPI wine_glMultiTexCoord2fARB(GLenum target, GLfloat s, GLfloat t) {
if(target != GL_TEXTURE0) {
ERR("Texture unit > 0 used, but GL_ARB_multitexture is not supported\n");
return;
}
context_get_current()->gl_info->gl_ops.gl.p_glTexCoord2f(s, t);
}
static void WINE_GLAPI wine_glMultiTexCoord2fvARB(GLenum target, const GLfloat *v) {
if(target != GL_TEXTURE0) {
ERR("Texture unit > 0 used, but GL_ARB_multitexture is not supported\n");
return;
}
context_get_current()->gl_info->gl_ops.gl.p_glTexCoord2fv(v);
}
static void WINE_GLAPI wine_glMultiTexCoord3fARB(GLenum target, GLfloat s, GLfloat t, GLfloat r) {
if(target != GL_TEXTURE0) {
ERR("Texture unit > 0 used, but GL_ARB_multitexture is not supported\n");
return;
}
context_get_current()->gl_info->gl_ops.gl.p_glTexCoord3f(s, t, r);
}
static void WINE_GLAPI wine_glMultiTexCoord3fvARB(GLenum target, const GLfloat *v) {
if(target != GL_TEXTURE0) {
ERR("Texture unit > 0 used, but GL_ARB_multitexture is not supported\n");
return;
}
context_get_current()->gl_info->gl_ops.gl.p_glTexCoord3fv(v);
}
static void WINE_GLAPI wine_glMultiTexCoord4fARB(GLenum target, GLfloat s, GLfloat t, GLfloat r, GLfloat q) {
if(target != GL_TEXTURE0) {
ERR("Texture unit > 0 used, but GL_ARB_multitexture is not supported\n");
return;
}
context_get_current()->gl_info->gl_ops.gl.p_glTexCoord4f(s, t, r, q);
}
static void WINE_GLAPI wine_glMultiTexCoord4fvARB(GLenum target, const GLfloat *v) {
if(target != GL_TEXTURE0) {
ERR("Texture unit > 0 used, but GL_ARB_multitexture is not supported\n");
return;
}
context_get_current()->gl_info->gl_ops.gl.p_glTexCoord4fv(v);
}
static void WINE_GLAPI wine_glMultiTexCoord2svARB(GLenum target, const GLshort *v) {
if(target != GL_TEXTURE0) {
ERR("Texture unit > 0 used, but GL_ARB_multitexture is not supported\n");
return;
}
context_get_current()->gl_info->gl_ops.gl.p_glTexCoord2sv(v);
}
static void WINE_GLAPI wine_glMultiTexCoord4svARB(GLenum target, const GLshort *v) {
if(target != GL_TEXTURE0) {
ERR("Texture unit > 0 used, but GL_ARB_multitexture is not supported\n");
return;
}
context_get_current()->gl_info->gl_ops.gl.p_glTexCoord4sv(v);
}
static void WINE_GLAPI wine_glActiveTexture(GLenum texture)
{
if(texture != GL_TEXTURE0) {
ERR("Texture unit > 0 used, but GL_ARB_multitexture is not supported\n");
return;
}
}
static void WINE_GLAPI wine_glClientActiveTextureARB(GLenum texture) {
if(texture != GL_TEXTURE0) {
ERR("Texture unit > 0 used, but GL_ARB_multitexture is not supported\n");
return;
}
}
static void (WINE_GLAPI *old_multitex_glGetIntegerv) (GLenum pname, GLint* params) = NULL;
static void WINE_GLAPI wine_glGetIntegerv(GLenum pname, GLint* params) {
switch(pname) {
case GL_ACTIVE_TEXTURE: *params = 0; break;
case GL_MAX_TEXTURE_UNITS_ARB: *params = 1; break;
default: old_multitex_glGetIntegerv(pname, params);
}
}
static void (WINE_GLAPI *old_multitex_glGetFloatv) (GLenum pname, GLfloat* params) = NULL;
static void WINE_GLAPI wine_glGetFloatv(GLenum pname, GLfloat* params) {
if (pname == GL_ACTIVE_TEXTURE) *params = 0.0f;
else old_multitex_glGetFloatv(pname, params);
}
static void (WINE_GLAPI *old_multitex_glGetDoublev) (GLenum pname, GLdouble* params) = NULL;
static void WINE_GLAPI wine_glGetDoublev(GLenum pname, GLdouble* params) {
if(pname == GL_ACTIVE_TEXTURE) *params = 0.0;
else old_multitex_glGetDoublev(pname, params);
}
/* Start GL_EXT_fogcoord emulation */
static void (WINE_GLAPI *old_fogcoord_glEnable) (GLenum cap) = NULL;
static void WINE_GLAPI wine_glEnable(GLenum cap) {
if(cap == GL_FOG) {
struct wined3d_context *ctx = context_get_current();
ctx->fog_enabled = 1;
if(ctx->gl_fog_source != GL_FRAGMENT_DEPTH_EXT) return;
}
old_fogcoord_glEnable(cap);
}
static void (WINE_GLAPI *old_fogcoord_glDisable) (GLenum cap) = NULL;
static void WINE_GLAPI wine_glDisable(GLenum cap) {
if(cap == GL_FOG) {
struct wined3d_context *ctx = context_get_current();
ctx->fog_enabled = 0;
if(ctx->gl_fog_source != GL_FRAGMENT_DEPTH_EXT) return;
}
old_fogcoord_glDisable(cap);
}
static void (WINE_GLAPI *old_fogcoord_glFogi) (GLenum pname, GLint param) = NULL;
static void WINE_GLAPI wine_glFogi(GLenum pname, GLint param) {
struct wined3d_context *ctx = context_get_current();
if(pname == GL_FOG_COORDINATE_SOURCE_EXT) {
ctx->gl_fog_source = param;
if(param == GL_FRAGMENT_DEPTH_EXT) {
if(ctx->fog_enabled) old_fogcoord_glEnable(GL_FOG);
} else {
WARN_(d3d_perf)("Fog coords activated, but not supported. Using slow emulation\n");
old_fogcoord_glDisable(GL_FOG);
}
} else {
if(pname == GL_FOG_START) {
ctx->fogstart = (float) param;
} else if(pname == GL_FOG_END) {
ctx->fogend = (float) param;
}
old_fogcoord_glFogi(pname, param);
}
}
static void (WINE_GLAPI *old_fogcoord_glFogiv) (GLenum pname, const GLint *param) = NULL;
static void WINE_GLAPI wine_glFogiv(GLenum pname, const GLint *param) {
struct wined3d_context *ctx = context_get_current();
if(pname == GL_FOG_COORDINATE_SOURCE_EXT) {
ctx->gl_fog_source = *param;
if(*param == GL_FRAGMENT_DEPTH_EXT) {
if(ctx->fog_enabled) old_fogcoord_glEnable(GL_FOG);
} else {
WARN_(d3d_perf)("Fog coords activated, but not supported. Using slow emulation\n");
old_fogcoord_glDisable(GL_FOG);
}
} else {
if(pname == GL_FOG_START) {
ctx->fogstart = (float) *param;
} else if(pname == GL_FOG_END) {
ctx->fogend = (float) *param;
}
old_fogcoord_glFogiv(pname, param);
}
}
static void (WINE_GLAPI *old_fogcoord_glFogf) (GLenum pname, GLfloat param) = NULL;
static void WINE_GLAPI wine_glFogf(GLenum pname, GLfloat param) {
struct wined3d_context *ctx = context_get_current();
if(pname == GL_FOG_COORDINATE_SOURCE_EXT) {
ctx->gl_fog_source = (GLint) param;
if(param == GL_FRAGMENT_DEPTH_EXT) {
if(ctx->fog_enabled) old_fogcoord_glEnable(GL_FOG);
} else {
WARN_(d3d_perf)("Fog coords activated, but not supported. Using slow emulation\n");
old_fogcoord_glDisable(GL_FOG);
}
} else {
if(pname == GL_FOG_START) {
ctx->fogstart = param;
} else if(pname == GL_FOG_END) {
ctx->fogend = param;
}
old_fogcoord_glFogf(pname, param);
}
}
static void (WINE_GLAPI *old_fogcoord_glFogfv) (GLenum pname, const GLfloat *param) = NULL;
static void WINE_GLAPI wine_glFogfv(GLenum pname, const GLfloat *param) {
struct wined3d_context *ctx = context_get_current();
if(pname == GL_FOG_COORDINATE_SOURCE_EXT) {
ctx->gl_fog_source = (GLint) *param;
if(*param == GL_FRAGMENT_DEPTH_EXT) {
if(ctx->fog_enabled) old_fogcoord_glEnable(GL_FOG);
} else {
WARN_(d3d_perf)("Fog coords activated, but not supported. Using slow emulation\n");
old_fogcoord_glDisable(GL_FOG);
}
} else {
if(pname == GL_FOG_COLOR) {
ctx->fogcolor[0] = param[0];
ctx->fogcolor[1] = param[1];
ctx->fogcolor[2] = param[2];
ctx->fogcolor[3] = param[3];
} else if(pname == GL_FOG_START) {
ctx->fogstart = *param;
} else if(pname == GL_FOG_END) {
ctx->fogend = *param;
}
old_fogcoord_glFogfv(pname, param);
}
}
static void (WINE_GLAPI *old_fogcoord_glVertex4f) (GLfloat x, GLfloat y, GLfloat z, GLfloat w) = NULL;
static void (WINE_GLAPI *old_fogcoord_glColor4f) (GLfloat r, GLfloat g, GLfloat b, GLfloat a) = NULL;
static void WINE_GLAPI wine_glVertex4f(GLfloat x, GLfloat y, GLfloat z, GLfloat w) {
struct wined3d_context *ctx = context_get_current();
/* This can be called from draw_test_quad() and at that point there is no
* wined3d_context current. */
if (!ctx)
{
old_fogcoord_glVertex4f(x, y, z, w);
return;
}
if(ctx->gl_fog_source == GL_FOG_COORDINATE_EXT && ctx->fog_enabled) {
GLfloat c[4] = {ctx->color[0], ctx->color[1], ctx->color[2], ctx->color[3]};
GLfloat i;
i = (ctx->fogend - ctx->fog_coord_value) / (ctx->fogend - ctx->fogstart);
c[0] = i * c[0] + (1.0f - i) * ctx->fogcolor[0];
c[1] = i * c[1] + (1.0f - i) * ctx->fogcolor[1];
c[2] = i * c[2] + (1.0f - i) * ctx->fogcolor[2];
old_fogcoord_glColor4f(c[0], c[1], c[2], c[3]);
old_fogcoord_glVertex4f(x, y, z, w);
} else {
old_fogcoord_glVertex4f(x, y, z, w);
}
}
static void WINE_GLAPI wine_glVertex4fv(const GLfloat *pos) {
wine_glVertex4f(pos[0], pos[1], pos[2], pos[3]);
}
static void WINE_GLAPI wine_glVertex3f(GLfloat x, GLfloat y, GLfloat z) {
wine_glVertex4f(x, y, z, 1.0f);
}
static void WINE_GLAPI wine_glVertex3fv(const GLfloat *pos) {
wine_glVertex4f(pos[0], pos[1], pos[2], 1.0f);
}
static void WINE_GLAPI wine_glColor4f(GLfloat r, GLfloat g, GLfloat b, GLfloat a) {
struct wined3d_context *ctx = context_get_current();
/* This can be called from draw_test_quad() and at that point there is no
* wined3d_context current. */
if (!ctx)
{
old_fogcoord_glColor4f(r, g, b, a);
return;
}
ctx->color[0] = r;
ctx->color[1] = g;
ctx->color[2] = b;
ctx->color[3] = a;
old_fogcoord_glColor4f(r, g, b, a);
}
static void WINE_GLAPI wine_glColor4fv(const GLfloat *c) {
wine_glColor4f(c[0], c[1], c[2], c[3]);
}
static void WINE_GLAPI wine_glColor3f(GLfloat r, GLfloat g, GLfloat b) {
wine_glColor4f(r, g, b, 1.0f);
}
static void WINE_GLAPI wine_glColor3fv(const GLfloat *c) {
wine_glColor4f(c[0], c[1], c[2], 1.0f);
}
static void WINE_GLAPI wine_glColor4ub(GLubyte r, GLubyte g, GLubyte b, GLubyte a) {
wine_glColor4f(r / 255.0f, g / 255.0f, b / 255.0f, a / 255.0f);
}
/* In D3D the fog coord is a UBYTE, so there's no problem with using the single
* precision function
*/
static void WINE_GLAPI wine_glFogCoordfEXT(GLfloat f) {
struct wined3d_context *ctx = context_get_current();
ctx->fog_coord_value = f;
}
static void WINE_GLAPI wine_glFogCoorddEXT(GLdouble f) {
wine_glFogCoordfEXT((GLfloat) f);
}
static void WINE_GLAPI wine_glFogCoordfvEXT(const GLfloat *f) {
wine_glFogCoordfEXT(*f);
}
static void WINE_GLAPI wine_glFogCoorddvEXT(const GLdouble *f) {
wine_glFogCoordfEXT((GLfloat) *f);
}
/* End GL_EXT_fog_coord emulation */
void install_gl_compat_wrapper(struct wined3d_gl_info *gl_info, enum wined3d_gl_extension ext)
{
switch (ext)
{
case ARB_MULTITEXTURE:
if (gl_info->supported[ARB_MULTITEXTURE])
return;
if (gl_info->gl_ops.ext.p_glActiveTexture == wine_glActiveTexture)
{
FIXME("ARB_multitexture emulation hooks already applied.\n");
return;
}
TRACE("Applying GL_ARB_multitexture emulation hooks.\n");
gl_info->gl_ops.ext.p_glActiveTexture = wine_glActiveTexture;
gl_info->gl_ops.ext.p_glClientActiveTextureARB = wine_glClientActiveTextureARB;
gl_info->gl_ops.ext.p_glMultiTexCoord1fARB = wine_glMultiTexCoord1fARB;
gl_info->gl_ops.ext.p_glMultiTexCoord1fvARB = wine_glMultiTexCoord1fvARB;
gl_info->gl_ops.ext.p_glMultiTexCoord2fARB = wine_glMultiTexCoord2fARB;
gl_info->gl_ops.ext.p_glMultiTexCoord2fvARB = wine_glMultiTexCoord2fvARB;
gl_info->gl_ops.ext.p_glMultiTexCoord3fARB = wine_glMultiTexCoord3fARB;
gl_info->gl_ops.ext.p_glMultiTexCoord3fvARB = wine_glMultiTexCoord3fvARB;
gl_info->gl_ops.ext.p_glMultiTexCoord4fARB = wine_glMultiTexCoord4fARB;
gl_info->gl_ops.ext.p_glMultiTexCoord4fvARB = wine_glMultiTexCoord4fvARB;
gl_info->gl_ops.ext.p_glMultiTexCoord2svARB = wine_glMultiTexCoord2svARB;
gl_info->gl_ops.ext.p_glMultiTexCoord4svARB = wine_glMultiTexCoord4svARB;
old_multitex_glGetIntegerv = gl_info->gl_ops.gl.p_glGetIntegerv;
gl_info->gl_ops.gl.p_glGetIntegerv = wine_glGetIntegerv;
old_multitex_glGetFloatv = gl_info->gl_ops.gl.p_glGetFloatv;
gl_info->gl_ops.gl.p_glGetFloatv = wine_glGetFloatv;
old_multitex_glGetDoublev = gl_info->gl_ops.gl.p_glGetDoublev;
gl_info->gl_ops.gl.p_glGetDoublev = wine_glGetDoublev;
gl_info->supported[ARB_MULTITEXTURE] = TRUE;
return;
case EXT_FOG_COORD:
/* This emulation isn't perfect. There are a number of potential problems, but they should
* not matter in practise:
*
* Fog vs fragment shader: If we are using GL_ARB_fragment_program with the fog option, the
* glDisable(GL_FOG) here won't matter. However, if we have GL_ARB_fragment_program, it is pretty
* unlikely that we don't have GL_EXT_fog_coord. Besides, we probably have GL_ARB_vertex_program
* too, which would allow fog coord emulation in a fixed function vertex pipeline replacement.
*
* Fog vs texture: We apply the fog in the vertex color. An app could set up texturing settings which
* ignore the vertex color, thus effectively disabling our fog. However, in D3D this type of fog is
* a per-vertex fog too, so the apps shouldn't do that.
*
* Fog vs lighting: The app could in theory use D3DFOG_NONE table and D3DFOG_NONE vertex fog with
* untransformed vertices. That enables lighting and fog coords at the same time, and the lighting
* calculations could affect the already blended in fog color. There's nothing we can do against that,
* but most apps using fog color do their own lighting too and often even use RHW vertices. So live
* with it.
*/
if (gl_info->supported[EXT_FOG_COORD])
return;
if (gl_info->gl_ops.gl.p_glFogi == wine_glFogi)
{
FIXME("EXT_fog_coord emulation hooks already applied.\n");
return;
}
TRACE("Applying GL_ARB_fog_coord emulation hooks\n");
/* This probably means that the implementation doesn't advertise the extension, but implicitly supports
* it via the GL core version, or someone messed around in the extension table in directx.c. Add version-
* dependent loading for this extension if we ever hit this situation
*/
if (gl_info->supported[ARB_FRAGMENT_PROGRAM])
{
FIXME("GL implementation supports GL_ARB_fragment_program but not GL_EXT_fog_coord\n");
FIXME("The fog coord emulation will most likely fail\n");
}
else if (gl_info->supported[ARB_FRAGMENT_SHADER])
{
FIXME("GL implementation supports GL_ARB_fragment_shader but not GL_EXT_fog_coord\n");
FIXME("The fog coord emulation will most likely fail\n");
}
old_fogcoord_glFogi = gl_info->gl_ops.gl.p_glFogi;
gl_info->gl_ops.gl.p_glFogi = wine_glFogi;
old_fogcoord_glFogiv = gl_info->gl_ops.gl.p_glFogiv;
gl_info->gl_ops.gl.p_glFogiv = wine_glFogiv;
old_fogcoord_glFogf = gl_info->gl_ops.gl.p_glFogf;
gl_info->gl_ops.gl.p_glFogf = wine_glFogf;
old_fogcoord_glFogfv = gl_info->gl_ops.gl.p_glFogfv;
gl_info->gl_ops.gl.p_glFogfv = wine_glFogfv;
old_fogcoord_glEnable = glEnableWINE;
glEnableWINE = wine_glEnable;
old_fogcoord_glDisable = glDisableWINE;
glDisableWINE = wine_glDisable;
old_fogcoord_glVertex4f = gl_info->gl_ops.gl.p_glVertex4f;
gl_info->gl_ops.gl.p_glVertex4f = wine_glVertex4f;
gl_info->gl_ops.gl.p_glVertex4fv = wine_glVertex4fv;
gl_info->gl_ops.gl.p_glVertex3f = wine_glVertex3f;
gl_info->gl_ops.gl.p_glVertex3fv = wine_glVertex3fv;
old_fogcoord_glColor4f = gl_info->gl_ops.gl.p_glColor4f;
gl_info->gl_ops.gl.p_glColor4f = wine_glColor4f;
gl_info->gl_ops.gl.p_glColor4fv = wine_glColor4fv;
gl_info->gl_ops.gl.p_glColor3f = wine_glColor3f;
gl_info->gl_ops.gl.p_glColor3fv = wine_glColor3fv;
gl_info->gl_ops.gl.p_glColor4ub = wine_glColor4ub;
gl_info->gl_ops.ext.p_glFogCoordfEXT = wine_glFogCoordfEXT;
gl_info->gl_ops.ext.p_glFogCoordfvEXT = wine_glFogCoordfvEXT;
gl_info->gl_ops.ext.p_glFogCoorddEXT = wine_glFogCoorddEXT;
gl_info->gl_ops.ext.p_glFogCoorddvEXT = wine_glFogCoorddvEXT;
gl_info->supported[EXT_FOG_COORD] = TRUE;
return;
default:
FIXME("Extension %u emulation not supported.\n", ext);
}
}
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