mesa.c

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/* Direct3D Device
 * Copyright (c) 1998 Lionel ULMER
 *
 * This file contains the MESA implementation of all the D3D devices that
 * Wine supports.
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "config.h"
#include "wine/port.h"

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

#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "objbase.h"
#include "wingdi.h"
#include "ddraw.h"
#include "d3d.h"
#include "wine/debug.h"
#include "wine/library.h"

#include "mesa_private.h"
#include "main.h"

WINE_DEFAULT_DEBUG_CHANNEL(ddraw);
WINE_DECLARE_DEBUG_CHANNEL(ddraw_geom);
WINE_DECLARE_DEBUG_CHANNEL(ddraw_fps);

/* x11drv GDI escapes */
#define X11DRV_ESCAPE 6789
enum x11drv_escape_codes
{
    X11DRV_GET_DISPLAY,   /* get X11 display for a DC */
    X11DRV_GET_DRAWABLE,  /* get current drawable for a DC */
    X11DRV_GET_FONT,      /* get current X font for a DC */
};

/* They are non-static as they are used by Direct3D in the creation function */
const GUID IID_D3DDEVICE_OpenGL = {
  0x31416d44,
  0x86ae,
  0x11d2,
  { 0x82,0x2d,0xa8,0xd5,0x31,0x87,0xca,0xfa }
};

const float id_mat[16] = {
    1.0, 0.0, 0.0, 0.0,
    0.0, 1.0, 0.0, 0.0,
    0.0, 0.0, 1.0, 0.0,
    0.0, 0.0, 0.0, 1.0
};

/* This is filled at DLL loading time */
static D3DDEVICEDESC7 opengl_device_caps;
GL_EXTENSIONS_LIST GL_extensions;

static void draw_primitive_strided(IDirect3DDeviceImpl *This,
				   D3DPRIMITIVETYPE d3dptPrimitiveType,
				   DWORD d3dvtVertexType,
				   LPD3DDRAWPRIMITIVESTRIDEDDATA lpD3DDrawPrimStrideData,
				   DWORD dwVertexCount,
				   LPWORD dwIndices,
				   DWORD dwIndexCount,
				   DWORD dwFlags) ;

static DWORD draw_primitive_handle_textures(IDirect3DDeviceImpl *This);

/* retrieve the X display to use on a given DC */
inline static Display *get_display( HDC hdc )
{
    Display *display;
    enum x11drv_escape_codes escape = X11DRV_GET_DISPLAY;

    if (!ExtEscape( hdc, X11DRV_ESCAPE, sizeof(escape), (LPCSTR)&escape,
                    sizeof(display), (LPSTR)&display )) display = NULL;

    return display;
}

#define UNLOCK_TEX_SIZE 256

#define DEPTH_RANGE_BIT (0x00000001 << 0)
#define VIEWPORT_BIT    (0x00000001 << 1)

static DWORD d3ddevice_set_state_for_flush(IDirect3DDeviceImpl *d3d_dev, LPCRECT pRect, BOOLEAN use_alpha, BOOLEAN *initial) {
    IDirect3DDeviceGLImpl* gl_d3d_dev = (IDirect3DDeviceGLImpl*) d3d_dev;
    DWORD opt_bitmap = 0x00000000;
    
    if (gl_d3d_dev->current_active_tex_unit != GL_TEXTURE0_WINE) {
	GL_extensions.glActiveTexture(GL_TEXTURE0_WINE);
	gl_d3d_dev->current_active_tex_unit = GL_TEXTURE0_WINE;
    }
    if (gl_d3d_dev->unlock_tex == 0) {
        glGenTextures(1, &gl_d3d_dev->unlock_tex);
	glBindTexture(GL_TEXTURE_2D, gl_d3d_dev->unlock_tex);
	*initial = TRUE;
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
    } else {
        glBindTexture(GL_TEXTURE_2D, gl_d3d_dev->unlock_tex);
	*initial = FALSE;
    }
    if (d3d_dev->tex_mat_is_identity[0] == FALSE) {
	glMatrixMode(GL_TEXTURE);
	glLoadIdentity();
    }
    
    if (gl_d3d_dev->transform_state != GL_TRANSFORM_ORTHO) {
	gl_d3d_dev->transform_state = GL_TRANSFORM_ORTHO;
	d3ddevice_set_ortho(d3d_dev);
    }
    
    if (gl_d3d_dev->depth_test != FALSE) glDisable(GL_DEPTH_TEST);
    if ((gl_d3d_dev->current_bound_texture[0] == NULL) ||
	(d3d_dev->state_block.texture_stage_state[0][D3DTSS_COLOROP - 1] == D3DTOP_DISABLE))
	glEnable(GL_TEXTURE_2D);
    if (gl_d3d_dev->current_bound_texture[1] != NULL) {
	if (gl_d3d_dev->current_active_tex_unit != GL_TEXTURE1_WINE) {
	    GL_extensions.glActiveTexture(GL_TEXTURE1_WINE);
	    gl_d3d_dev->current_active_tex_unit = GL_TEXTURE1_WINE;
	}
	/* 'unbound' texture level 1 in that case to disable multi-texturing */
	glBindTexture(GL_TEXTURE_2D, 0);
	glDisable(GL_TEXTURE_2D);
    }
    glEnable(GL_SCISSOR_TEST);
    if ((d3d_dev->active_viewport.dvMinZ != 0.0) ||
	(d3d_dev->active_viewport.dvMaxZ != 1.0)) {
	glDepthRange(0.0, 1.0);
	opt_bitmap |= DEPTH_RANGE_BIT;
    }
    if ((d3d_dev->active_viewport.dwX != 0) ||
	(d3d_dev->active_viewport.dwY != 0) ||
	(d3d_dev->active_viewport.dwWidth != d3d_dev->surface->surface_desc.dwWidth) ||
	(d3d_dev->active_viewport.dwHeight != d3d_dev->surface->surface_desc.dwHeight)) {
	glViewport(0, 0, d3d_dev->surface->surface_desc.dwWidth, d3d_dev->surface->surface_desc.dwHeight);
	opt_bitmap |= VIEWPORT_BIT;
    }
    glScissor(pRect->left, d3d_dev->surface->surface_desc.dwHeight - pRect->bottom,
	      pRect->right - pRect->left, pRect->bottom - pRect->top);
    if (gl_d3d_dev->lighting != FALSE) glDisable(GL_LIGHTING);
    if (gl_d3d_dev->cull_face != FALSE) glDisable(GL_CULL_FACE);
    if (use_alpha) {
	if (gl_d3d_dev->alpha_test == FALSE) glEnable(GL_ALPHA_TEST);
	if (((d3d_dev->state_block.render_state[D3DRENDERSTATE_ALPHAREF - 1] & 0x000000FF) != 0x00) ||
	    ((d3d_dev->state_block.render_state[D3DRENDERSTATE_ALPHAFUNC - 1]) != D3DCMP_GREATER)) {
	    glAlphaFunc(GL_GREATER, 0.0);
	}
    } else {
	if (gl_d3d_dev->alpha_test != FALSE) glDisable(GL_ALPHA_TEST);
    }
    if (gl_d3d_dev->stencil_test != FALSE) glDisable(GL_STENCIL_TEST);
    if (gl_d3d_dev->blending != FALSE) glDisable(GL_BLEND);
    if (gl_d3d_dev->fogging != FALSE) glDisable(GL_FOG);
    if (gl_d3d_dev->current_tex_env != GL_REPLACE)
	glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
    
    return opt_bitmap;
}

static void d3ddevice_restore_state_after_flush(IDirect3DDeviceImpl *d3d_dev, DWORD opt_bitmap, BOOLEAN use_alpha) {
    IDirect3DDeviceGLImpl* gl_d3d_dev = (IDirect3DDeviceGLImpl*) d3d_dev;

    /* And restore all the various states modified by this code */
    if (gl_d3d_dev->depth_test != 0) glEnable(GL_DEPTH_TEST);
    if (gl_d3d_dev->lighting != 0) glEnable(GL_LIGHTING);
    if ((gl_d3d_dev->alpha_test != 0) && (use_alpha == 0))
	glEnable(GL_ALPHA_TEST);
    else if ((gl_d3d_dev->alpha_test == 0) && (use_alpha != 0))
	glDisable(GL_ALPHA_TEST);
    if (use_alpha) {
	if (((d3d_dev->state_block.render_state[D3DRENDERSTATE_ALPHAREF - 1] & 0x000000FF) != 0x00) ||
	    ((d3d_dev->state_block.render_state[D3DRENDERSTATE_ALPHAFUNC - 1]) != D3DCMP_GREATER)) {
	    glAlphaFunc(convert_D3D_compare_to_GL(d3d_dev->state_block.render_state[D3DRENDERSTATE_ALPHAFUNC - 1]),
			(d3d_dev->state_block.render_state[D3DRENDERSTATE_ALPHAREF - 1] & 0x000000FF) / 255.0);
	}
    }
    if (gl_d3d_dev->stencil_test != 0) glEnable(GL_STENCIL_TEST);
    if (gl_d3d_dev->cull_face != 0) glEnable(GL_CULL_FACE);
    if (gl_d3d_dev->blending != 0) glEnable(GL_BLEND);
    if (gl_d3d_dev->fogging != 0) glEnable(GL_FOG);
    glDisable(GL_SCISSOR_TEST);
    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, gl_d3d_dev->current_tex_env);
    if (opt_bitmap & DEPTH_RANGE_BIT) {
	glDepthRange(d3d_dev->active_viewport.dvMinZ, d3d_dev->active_viewport.dvMaxZ);
    }
    if (opt_bitmap & VIEWPORT_BIT) {
	glViewport(d3d_dev->active_viewport.dwX,
		   d3d_dev->surface->surface_desc.dwHeight - (d3d_dev->active_viewport.dwHeight + d3d_dev->active_viewport.dwY),
		   d3d_dev->active_viewport.dwWidth, d3d_dev->active_viewport.dwHeight);
    }
    if (d3d_dev->tex_mat_is_identity[0] == FALSE) {
	d3d_dev->matrices_updated(d3d_dev, TEXMAT0_CHANGED);
    }
    
    /* This is a hack to prevent querying the current texture from GL. Basically, at the next
       DrawPrimitive call, this will bind the correct texture to this stage. */
    gl_d3d_dev->current_bound_texture[0] = (IDirectDrawSurfaceImpl *) 0x00000001;
    gl_d3d_dev->current_bound_texture[1] = (IDirectDrawSurfaceImpl *) 0x00000000;
    if (d3d_dev->state_block.texture_stage_state[0][D3DTSS_COLOROP - 1] == D3DTOP_DISABLE) glDisable(GL_TEXTURE_2D);
}

/* retrieve the X drawable to use on a given DC */
inline static Drawable get_drawable( HDC hdc )
{
    Drawable drawable;
    enum x11drv_escape_codes escape = X11DRV_GET_DRAWABLE;

    if (!ExtEscape( hdc, X11DRV_ESCAPE, sizeof(escape), (LPCSTR)&escape,
                    sizeof(drawable), (LPSTR)&drawable )) drawable = 0;

    return drawable;
}

/* This is unnecessarely complicated :-) */
#define MEASUREMENT_WINDOW 5
#define NUMBER_OF_WINDOWS 10

static LONGLONG perf_freq;
static LONGLONG perf_storage[NUMBER_OF_WINDOWS];
static LONGLONG prev_time = 0;
static unsigned int current_window;
static unsigned int measurements_in_window;
static unsigned int valid_windows;

static BOOL opengl_flip( LPVOID dev, LPVOID drawable)
{
    IDirect3DDeviceImpl *d3d_dev = (IDirect3DDeviceImpl *) dev;
    IDirect3DDeviceGLImpl *gl_d3d_dev = (IDirect3DDeviceGLImpl *) dev;

    TRACE("(%p, %ld)\n", gl_d3d_dev->display,(Drawable)drawable);
    ENTER_GL();
    if (gl_d3d_dev->state[WINE_GL_BUFFER_BACK] == SURFACE_MEMORY_DIRTY) {
        d3d_dev->flush_to_framebuffer(d3d_dev, &(gl_d3d_dev->lock_rect[WINE_GL_BUFFER_BACK]), gl_d3d_dev->lock_surf[WINE_GL_BUFFER_BACK]);
    }
    gl_d3d_dev->state[WINE_GL_BUFFER_BACK] = SURFACE_GL;
    gl_d3d_dev->state[WINE_GL_BUFFER_FRONT] = SURFACE_GL;
    glXSwapBuffers(gl_d3d_dev->display, (Drawable)drawable);
    LEAVE_GL();

    if (TRACE_ON(ddraw_fps)) {
	LONGLONG current_time;
	LONGLONG frame_duration;
	QueryPerformanceCounter((LARGE_INTEGER *) &current_time);

	if (prev_time != 0) {
	    LONGLONG total_time = 0;
	    int tot_meas;
	    
	    frame_duration = current_time - prev_time;
	    prev_time = current_time;
	    
	    perf_storage[current_window] += frame_duration;
	    measurements_in_window++;
	    
	    if (measurements_in_window >= MEASUREMENT_WINDOW) {
		current_window++;
		valid_windows++;

		if (valid_windows < NUMBER_OF_WINDOWS) {
		    int i;
		    tot_meas = valid_windows * MEASUREMENT_WINDOW;
		    for (i = 0; i < valid_windows; i++) {
			total_time += perf_storage[i];
		    }
		} else {
		    int i;
		    tot_meas = NUMBER_OF_WINDOWS * MEASUREMENT_WINDOW;
		    for (i = 0; i < NUMBER_OF_WINDOWS; i++) {
			total_time += perf_storage[i];
		    }
		}

		TRACE_(ddraw_fps)(" %9.5f\n", (double) (perf_freq * tot_meas) / (double) total_time);
		
		if (current_window >= NUMBER_OF_WINDOWS) {
		    current_window = 0;
		}
		perf_storage[current_window] = 0;
		measurements_in_window = 0;
	    }
	} else {
	    prev_time = current_time;
	    memset(perf_storage, 0, sizeof(perf_storage));
	    current_window = 0;
	    valid_windows = 0;
	    measurements_in_window = 0;
	    QueryPerformanceFrequency((LARGE_INTEGER *) &perf_freq);
	}
    }
    
    return TRUE;
}


/*******************************************************************************
 *				OpenGL static functions
 */
static void set_context(IDirect3DDeviceImpl* This)
{
    IDirect3DDeviceGLImpl* glThis = (IDirect3DDeviceGLImpl*) This;
   
    TRACE("glxMakeCurrent %p, %ld, %p\n",glThis->display,glThis->drawable, glThis->gl_context);
    ENTER_GL();
    if (glXMakeCurrent(glThis->display, glThis->drawable, glThis->gl_context) == False) {
	ERR("Error in setting current context (context %p drawable %ld)!\n",
	    glThis->gl_context, glThis->drawable);
    }
    LEAVE_GL();
}

static void fill_opengl_caps(D3DDEVICEDESC *d1)
{