i810screen.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

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/* $XFree86: xc/lib/GL/mesa/src/drv/i810/i810screen.c,v 1.2 2002/10/30 12:51:33 alanh Exp $ */

/*
 * Authors:
 *   Keith Whitwell <[e-mail]>
 *
 */


#include "glheader.h"
#include "imports.h"
#include "context.h"
#include "framebuffer.h"
#include "fbobject.h"
#include "matrix.h"
#include "renderbuffer.h"
#include "simple_list.h"
#include "utils.h"

#include "i810screen.h"
#include "i810_dri.h"

#include "i810state.h"
#include "i810tex.h"
#include "i810span.h"
#include "i810tris.h"
#include "i810ioctl.h"

#include "GL/internal/dri_interface.h"

extern const struct dri_extension card_extensions[];

static const __DRIconfig **
i810FillInModes( __DRIscreenPrivate *psp,
		 unsigned pixel_bits, unsigned depth_bits,
		 unsigned stencil_bits, GLboolean have_back_buffer )
{
    __DRIconfig **configs;
    __GLcontextModes * m;
    unsigned depth_buffer_factor;
    unsigned back_buffer_factor;
    unsigned i;

    /* Right now GLX_SWAP_COPY_OML isn't supported, but it would be easy
     * enough to add support.  Basically, if a context is created with an
     * fbconfig where the swap method is GLX_SWAP_COPY_OML, pageflipping
     * will never be used.
     */
    static const GLenum back_buffer_modes[] = {
	GLX_NONE, GLX_SWAP_UNDEFINED_OML /*, GLX_SWAP_COPY_OML */
    };

    u_int8_t depth_bits_array[2];
    u_int8_t stencil_bits_array[2];

    depth_bits_array[0] = depth_bits;
    depth_bits_array[1] = depth_bits;

    /* Just like with the accumulation buffer, always provide some modes
     * with a stencil buffer.  It will be a sw fallback, but some apps won't
     * care about that.
     */
    stencil_bits_array[0] = 0;
    stencil_bits_array[1] = (stencil_bits == 0) ? 8 : stencil_bits;

    depth_buffer_factor = ((depth_bits != 0) || (stencil_bits != 0)) ? 2 : 1;
    back_buffer_factor  = (have_back_buffer) ? 2 : 1;

    configs = driCreateConfigs(GL_RGB, GL_UNSIGNED_SHORT_5_6_5,
			       depth_bits_array, stencil_bits_array,
			       depth_buffer_factor,
			       back_buffer_modes, back_buffer_factor);
    if (configs == NULL) {
	fprintf( stderr, "[%s:%u] Error creating FBConfig!\n",
		 __func__, __LINE__ );
	return NULL;
    }

    /* Mark the visual as slow if there are "fake" stencil bits.
     */
    for (i = 0; configs[i]; i++) {
	m = &configs[i]->modes;
	if ((m->stencilBits != 0) && (m->stencilBits != stencil_bits)) {
	    m->visualRating = GLX_SLOW_CONFIG;
	}
    }

    return (const __DRIconfig **) configs;
}

     
/*  static int i810_malloc_proxy_buf(drmBufMapPtr buffers) */
/*  { */
/*     char *buffer; */
/*     drmBufPtr buf; */
/*     int i; */

/*     buffer = CALLOC(I810_DMA_BUF_SZ); */
/*     if(buffer == NULL) return -1; */
/*     for(i = 0; i < I810_DMA_BUF_NR; i++) { */
/*        buf = &(buffers->list[i]); */
/*        buf->address = (drmAddress)buffer; */
/*     } */
/*     return 0; */
/*  } */

static drmBufMapPtr i810_create_empty_buffers(void)
{
   drmBufMapPtr retval;

   retval = (drmBufMapPtr)ALIGN_MALLOC(sizeof(drmBufMap), 32);
   if(retval == NULL) return NULL;
   memset(retval, 0, sizeof(drmBufMap));
   retval->list = (drmBufPtr)ALIGN_MALLOC(sizeof(drmBuf) * I810_DMA_BUF_NR, 32);
   if(retval->list == NULL) {
      ALIGN_FREE(retval);
      return NULL;
   }
   memset(retval->list, 0, sizeof(drmBuf) * I810_DMA_BUF_NR);
   return retval;
}


static const __DRIconfig **
i810InitScreen(__DRIscreen *sPriv)
{
   static const __DRIversion ddx_expected = { 1, 0, 0 };
   static const __DRIversion dri_expected = { 4, 0, 0 };
   static const __DRIversion drm_expected = { 1, 2, 0 };
   i810ScreenPrivate *i810Screen;
   I810DRIPtr         gDRIPriv = (I810DRIPtr)sPriv->pDevPriv;

   if ( ! driCheckDriDdxDrmVersions2( "i810",
				      &sPriv->dri_version, & dri_expected,
				      &sPriv->ddx_version, & ddx_expected,
				      &sPriv->drm_version, & drm_expected ) ) {
      return NULL;
   }

   driInitExtensions( NULL, card_extensions, GL_TRUE );

   if (sPriv->devPrivSize != sizeof(I810DRIRec)) {
      fprintf(stderr,"\nERROR!  sizeof(I810DRIRec) does not match passed size from device driver\n");
      return GL_FALSE;
   }

   /* Allocate the private area */
   i810Screen = (i810ScreenPrivate *)CALLOC(sizeof(i810ScreenPrivate));
   if (!i810Screen) {
      __driUtilMessage("i810InitDriver: alloc i810ScreenPrivate struct failed");
      return GL_FALSE;
   }

   i810Screen->driScrnPriv = sPriv;
   sPriv->private = (void *)i810Screen;

   i810Screen->deviceID=gDRIPriv->deviceID;
   i810Screen->width=gDRIPriv->width;
   i810Screen->height=gDRIPriv->height;
   i810Screen->mem=gDRIPriv->mem;
   i810Screen->cpp=gDRIPriv->cpp;
   i810Screen->fbStride=gDRIPriv->fbStride;
   i810Screen->fbOffset=gDRIPriv->fbOffset;

   if (gDRIPriv->bitsPerPixel == 15)
      i810Screen->fbFormat = DV_PF_555;
   else
      i810Screen->fbFormat = DV_PF_565;

   i810Screen->backOffset=gDRIPriv->backOffset;
   i810Screen->depthOffset=gDRIPriv->depthOffset;
   i810Screen->backPitch = gDRIPriv->auxPitch;
   i810Screen->backPitchBits = gDRIPriv->auxPitchBits;
   i810Screen->textureOffset=gDRIPriv->textureOffset;
   i810Screen->textureSize=gDRIPriv->textureSize;
   i810Screen->logTextureGranularity = gDRIPriv->logTextureGranularity;

   i810Screen->bufs = i810_create_empty_buffers();
   if (i810Screen->bufs == NULL) {
      __driUtilMessage("i810InitDriver: i810_create_empty_buffers() failed");
      FREE(i810Screen);
      return GL_FALSE;
   }

   i810Screen->back.handle = gDRIPriv->backbuffer;
   i810Screen->back.size = gDRIPriv->backbufferSize;

   if (drmMap(sPriv->fd,
	      i810Screen->back.handle,
	      i810Screen->back.size,
	      (drmAddress *)&i810Screen->back.map) != 0) {
      FREE(i810Screen);
      sPriv->private = NULL;
      __driUtilMessage("i810InitDriver: drmMap failed");
      return GL_FALSE;
   }

   i810Screen->depth.handle = gDRIPriv->depthbuffer;
   i810Screen->depth.size = gDRIPriv->depthbufferSize;

   if (drmMap(sPriv->fd,
	      i810Screen->depth.handle,
	      i810Screen->depth.size,
	      (drmAddress *)&i810Screen->depth.map) != 0) {
      drmUnmap(i810Screen->back.map, i810Screen->back.size);
      FREE(i810Screen);
      sPriv->private = NULL;
      __driUtilMessage("i810InitDriver: drmMap (2) failed");
      return GL_FALSE;
   }

   i810Screen->tex.handle = gDRIPriv->textures;
   i810Screen->tex.size = gDRIPriv->textureSize;

   if (drmMap(sPriv->fd,
	      i810Screen->tex.handle,
	      i810Screen->tex.size,
	      (drmAddress *)&i810Screen->tex.map) != 0) {
      drmUnmap(i810Screen->back.map, i810Screen->back.size);
      drmUnmap(i810Screen->depth.map, i810Screen->depth.size);
      FREE(i810Screen);
      sPriv->private = NULL;
      __driUtilMessage("i810InitDriver: drmMap (3) failed");
      return GL_FALSE;
   }

   i810Screen->sarea_priv_offset = gDRIPriv->sarea_priv_offset;

   return i810FillInModes(sPriv, 16, 16, 0, 1);
}

static void
i810DestroyScreen(__DRIscreenPrivate *sPriv)
{
   i810ScreenPrivate *i810Screen = (i810ScreenPrivate *)sPriv->private;

   /* Need to unmap all the bufs and maps here:
    */
   drmUnmap(i810Screen->back.map, i810Screen->back.size);
   drmUnmap(i810Screen->depth.map, i810Screen->depth.size);
   drmUnmap(i810Screen->tex.map, i810Screen->tex.size);

   FREE(i810Screen);
   sPriv->private = NULL;
}


/**
 * Create a buffer which corresponds to the window.
 */
static GLboolean
i810CreateBuffer( __DRIscreenPrivate *driScrnPriv,
                  __DRIdrawablePrivate *driDrawPriv,
                  const __GLcontextModes *mesaVis,
                  GLboolean isPixmap )
{
   i810ScreenPrivate *screen = (i810ScreenPrivate *) driScrnPriv->private;

   if (isPixmap) {
      return GL_FALSE; /* not implemented */
   }
   else {
      struct gl_framebuffer *fb = _mesa_create_framebuffer(mesaVis);

      {
         driRenderbuffer *frontRb
            = driNewRenderbuffer(GL_RGBA,
                                 driScrnPriv->pFB,
                                 screen->cpp,
                                 /*screen->frontOffset*/0, screen->backPitch,
                                 driDrawPriv);
         i810SetSpanFunctions(frontRb, mesaVis);
         _mesa_add_renderbuffer(fb, BUFFER_FRONT_LEFT, &frontRb->Base);
      }

      if (mesaVis->doubleBufferMode) {
         driRenderbuffer *backRb
            = driNewRenderbuffer(GL_RGBA,
                                 screen->back.map,
                                 screen->cpp,
                                 screen->backOffset, screen->backPitch,
                                 driDrawPriv);
         i810SetSpanFunctions(backRb, mesaVis);
         _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &backRb->Base);
      }

      if (mesaVis->depthBits == 16) {
         driRenderbuffer *depthRb
            = driNewRenderbuffer(GL_DEPTH_COMPONENT16,
                                 screen->depth.map,
                                 screen->cpp,
                                 screen->depthOffset, screen->backPitch,
                                 driDrawPriv);
         i810SetSpanFunctions(depthRb, mesaVis);
         _mesa_add_renderbuffer(fb, BUFFER_DEPTH, &depthRb->Base);
      }

      _mesa_add_soft_renderbuffers(fb,
                                   GL_FALSE, /* color */
                                   GL_FALSE, /* depth */
                                   mesaVis->stencilBits > 0,
                                   mesaVis->accumRedBits > 0,
                                   GL_FALSE, /* alpha */
                                   GL_FALSE /* aux */);
      driDrawPriv->driverPrivate = (void *) fb;

      return (driDrawPriv->driverPrivate != NULL);
   }
}


static void
i810DestroyBuffer(__DRIdrawablePrivate *driDrawPriv)
{
    _mesa_unreference_framebuffer((GLframebuffer **)(&(driDrawPriv->driverPrivate)));
}

const struct __DriverAPIRec driDriverAPI = {
   .InitScreen      = i810InitScreen,
   .DestroyScreen   = i810DestroyScreen,
   .CreateContext   = i810CreateContext,
   .DestroyContext  = i810DestroyContext,
   .CreateBuffer    = i810CreateBuffer,
   .DestroyBuffer   = i810DestroyBuffer,
   .SwapBuffers     = i810SwapBuffers,
   .MakeCurrent     = i810MakeCurrent,
   .UnbindContext   = i810UnbindContext,
   .GetSwapInfo     = NULL,
   .GetDrawableMSC  = NULL,
   .WaitForMSC      = NULL,
   .WaitForSBC      = NULL,
   .SwapBuffersMSC  = NULL
};