New driver for i915 as well as older i830/i845/i865 chipsets.

1 files changed, 699 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i915/i830_metaops.c b/src/mesa/drivers/dri/i915/i830_metaops.c
new file mode 100644
index 0000000000..fb2ee12f41
--- /dev/null
+++ b/src/mesa/drivers/dri/i915/i830_metaops.c
@@ -0,0 +1,699 @@
+/**************************************************************************
+ * 
+ * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ **************************************************************************/
+
+#include "glheader.h"
+#include "enums.h"
+#include "mtypes.h"
+#include "macros.h"
+#include "utils.h"
+
+#include "intel_screen.h"
+#include "intel_batchbuffer.h"
+#include "intel_ioctl.h"
+
+#include "i830_context.h"
+#include "i830_reg.h"
+
+/* A large amount of state doesn't need to be uploaded.
+ */
+#define ACTIVE (I830_UPLOAD_TEXBLEND(0) |	\
+		I830_UPLOAD_STIPPLE |		\
+		I830_UPLOAD_CTX |		\
+		I830_UPLOAD_BUFFERS |		\
+		I830_UPLOAD_TEX(0))		
+
+
+#define SET_STATE( i830, STATE )		\
+do {						\
+   i830->current->emitted &= ~ACTIVE;			\
+   i830->current = &i830->STATE;		\
+   i830->current->emitted &= ~ACTIVE;			\
+} while (0)
+
+/* Operations where the 3D engine is decoupled temporarily from the
+ * current GL state and used for other purposes than simply rendering
+ * incoming triangles.
+ */
+static void set_initial_state( i830ContextPtr i830 )
+{
+   memcpy(&i830->meta, &i830->initial, sizeof(i830->meta) );
+   i830->meta.active = ACTIVE;
+   i830->meta.emitted = 0;
+}
+
+
+static void set_no_depth_stencil_write( i830ContextPtr i830 )
+{
+   /* ctx->Driver.Enable( ctx, GL_STENCIL_TEST, GL_FALSE )
+    */
+   i830->meta.Ctx[I830_CTXREG_ENABLES_1] &= ~ENABLE_STENCIL_TEST;
+   i830->meta.Ctx[I830_CTXREG_ENABLES_2] &= ~ENABLE_STENCIL_WRITE;
+   i830->meta.Ctx[I830_CTXREG_ENABLES_1] |= DISABLE_STENCIL_TEST;
+   i830->meta.Ctx[I830_CTXREG_ENABLES_2] |= DISABLE_STENCIL_WRITE;
+
+
+   /* ctx->Driver.Enable( ctx, GL_DEPTH_TEST, GL_FALSE )
+    */
+   i830->meta.Ctx[I830_CTXREG_ENABLES_1] &= ~ENABLE_DIS_DEPTH_TEST_MASK;
+   i830->meta.Ctx[I830_CTXREG_ENABLES_2] &= ~ENABLE_DIS_DEPTH_WRITE_MASK;
+   i830->meta.Ctx[I830_CTXREG_ENABLES_1] |= DISABLE_DEPTH_TEST;
+   i830->meta.Ctx[I830_CTXREG_ENABLES_2] |= DISABLE_DEPTH_WRITE;
+
+   i830->meta.emitted &= ~I830_UPLOAD_CTX;
+}
+
+/* Set stencil unit to replace always with the reference value.
+ */
+static void set_stencil_replace( i830ContextPtr i830,
+				 GLuint s_mask,
+				 GLuint s_clear)
+{
+   /* ctx->Driver.Enable( ctx, GL_STENCIL_TEST, GL_TRUE )
+    */
+   i830->meta.Ctx[I830_CTXREG_ENABLES_1] |= ENABLE_STENCIL_TEST;
+   i830->meta.Ctx[I830_CTXREG_ENABLES_2] |= ENABLE_STENCIL_WRITE;
+
+
+   /* ctx->Driver.Enable( ctx, GL_DEPTH_TEST, GL_FALSE )
+    */
+   i830->meta.Ctx[I830_CTXREG_ENABLES_1] &= ~ENABLE_DIS_DEPTH_TEST_MASK;
+   i830->meta.Ctx[I830_CTXREG_ENABLES_2] &= ~ENABLE_DIS_DEPTH_WRITE_MASK;
+   i830->meta.Ctx[I830_CTXREG_ENABLES_1] |= DISABLE_DEPTH_TEST;
+   i830->meta.Ctx[I830_CTXREG_ENABLES_2] |= DISABLE_DEPTH_WRITE;
+
+   /* ctx->Driver.StencilMask( ctx, s_mask )
+    */
+   i830->meta.Ctx[I830_CTXREG_STATE4] &= ~MODE4_ENABLE_STENCIL_WRITE_MASK;
+   i830->meta.Ctx[I830_CTXREG_STATE4] |= (ENABLE_STENCIL_WRITE_MASK |
+					   STENCIL_WRITE_MASK((s_mask&0xff)));
+
+   /* ctx->Driver.StencilOp( ctx, GL_REPLACE, GL_REPLACE, GL_REPLACE )
+    */
+   i830->meta.Ctx[I830_CTXREG_STENCILTST] &= ~(STENCIL_OPS_MASK);
+   i830->meta.Ctx[I830_CTXREG_STENCILTST] |= 
+      (ENABLE_STENCIL_PARMS |
+       STENCIL_FAIL_OP(STENCILOP_REPLACE) |
+       STENCIL_PASS_DEPTH_FAIL_OP(STENCILOP_REPLACE) |
+       STENCIL_PASS_DEPTH_PASS_OP(STENCILOP_REPLACE));
+
+   /* ctx->Driver.StencilFunc( ctx, GL_ALWAYS, s_clear, ~0 )
+    */
+   i830->meta.Ctx[I830_CTXREG_STATE4] &= ~MODE4_ENABLE_STENCIL_TEST_MASK;
+   i830->meta.Ctx[I830_CTXREG_STATE4] |= (ENABLE_STENCIL_TEST_MASK |
+					   STENCIL_TEST_MASK(0xff));
+
+   i830->meta.Ctx[I830_CTXREG_STENCILTST] &= ~(STENCIL_REF_VALUE_MASK |
+						ENABLE_STENCIL_TEST_FUNC_MASK);
+   i830->meta.Ctx[I830_CTXREG_STENCILTST] |= 
+      (ENABLE_STENCIL_REF_VALUE |
+       ENABLE_STENCIL_TEST_FUNC |
+       STENCIL_REF_VALUE((s_clear&0xff)) |
+       STENCIL_TEST_FUNC(COMPAREFUNC_ALWAYS));
+
+
+
+   i830->meta.emitted &= ~I830_UPLOAD_CTX;
+}
+
+
+static void set_color_mask( i830ContextPtr i830, GLboolean state )
+{
+   const GLuint mask = ((1 << WRITEMASK_RED_SHIFT) |
+			(1 << WRITEMASK_GREEN_SHIFT) |
+			(1 << WRITEMASK_BLUE_SHIFT) |
+			(1 << WRITEMASK_ALPHA_SHIFT));
+
+   if (state) {
+      i830->meta.Ctx[I830_CTXREG_ENABLES_2] &= ~mask;
+      i830->meta.Ctx[I830_CTXREG_ENABLES_2] |= 
+	 (i830->state.Ctx[I830_CTXREG_ENABLES_2] & mask);
+   }
+   else 
+      i830->meta.Ctx[I830_CTXREG_ENABLES_2] |= mask;
+      
+   i830->meta.emitted &= ~I830_UPLOAD_CTX;
+}
+
+/* Installs a one-stage passthrough texture blend pipeline.  Is there
+ * more that can be done to turn off texturing?
+ */
+static void set_no_texture( i830ContextPtr i830 )
+{
+   i830->meta.TexBlendWordsUsed[0] = 
+      i830SetBlend_GL1_2( i830, 0, GL_NONE, 0, 
+			  TEXBLENDARG_TEXEL0,
+			  i830->meta.TexBlend[0], 0 );
+   i830->meta.TexBlend[0][0] |= TEXOP_LAST_STAGE;
+   i830->meta.emitted &= ~I830_UPLOAD_TEXBLEND(0);
+}
+
+/* Set up a single element blend stage for 'replace' texturing with no
+ * funny ops.
+ */
+static void enable_texture_blend_replace( i830ContextPtr i830,
+					  GLenum format )
+{
+   i830->meta.TexBlendWordsUsed[0] = 
+      i830SetBlend_GL1_2( i830, 0, GL_REPLACE, format, 
+			  TEXBLENDARG_TEXEL0,
+			  i830->meta.TexBlend[0], 0 );
+   i830->meta.TexBlend[0][0] |= TEXOP_LAST_STAGE;
+   i830->meta.emitted &= ~I830_UPLOAD_TEXBLEND(0);
+
+/*    fprintf(stderr, "%s: TexBlendWordsUsed[0]: %d\n",  */
+/* 	   __FUNCTION__, i830->meta.TexBlendWordsUsed[0]); */
+}
+
+
+
+/* Set up an arbitary piece of memory as a rectangular texture
+ * (including the front or back buffer).
+ */
+static void set_tex_rect_source( i830ContextPtr i830,
+				 GLuint offset,
+				 GLuint width, 
+				 GLuint height,
+				 GLuint pitch,
+				 GLuint textureFormat )
+{
+   GLint numLevels = 1;
+   GLuint *setup = i830->meta.Tex[0];
+
+   pitch *= i830->intel.intelScreen->cpp;
+
+/*    fprintf(stderr, "%s: offset: %x w: %d h: %d pitch %d format %x\n", */
+/* 	   __FUNCTION__, offset, width, height, pitch, textureFormat ); */
+
+   setup[I830_TEXREG_TM0LI] = (_3DSTATE_LOAD_STATE_IMMEDIATE_2 | 
+			       (LOAD_TEXTURE_MAP0 << 0) | 4);
+   setup[I830_TEXREG_TM0S0] = (TM0S0_USE_FENCE | offset);
+   setup[I830_TEXREG_TM0S1] = (((height - 1) << TM0S1_HEIGHT_SHIFT) |
+			       ((width - 1) << TM0S1_WIDTH_SHIFT) |
+			       textureFormat);
+   setup[I830_TEXREG_TM0S2] = ((((pitch / 4) - 1) << TM0S2_PITCH_SHIFT));   
+   setup[I830_TEXREG_TM0S3] &= ~TM0S3_MAX_MIP_MASK;
+   setup[I830_TEXREG_TM0S3] &= ~TM0S3_MIN_MIP_MASK;
+   setup[I830_TEXREG_TM0S3] |= ((numLevels - 1)*4) << TM0S3_MIN_MIP_SHIFT;
+
+   setup[I830_TEXREG_MCS] = (_3DSTATE_MAP_COORD_SET_CMD |
+			     MAP_UNIT(0) |
+			     ENABLE_TEXCOORD_PARAMS |
+			     TEXCOORDS_ARE_IN_TEXELUNITS |
+			     TEXCOORDTYPE_CARTESIAN |
+			     ENABLE_ADDR_V_CNTL |
+			     TEXCOORD_ADDR_V_MODE(TEXCOORDMODE_WRAP) |
+			     ENABLE_ADDR_U_CNTL |
+			     TEXCOORD_ADDR_U_MODE(TEXCOORDMODE_WRAP));
+
+   i830->meta.emitted &= ~I830_UPLOAD_TEX(0);
+}
+
+
+/* Select between front and back draw buffers.
+ */
+static void set_draw_offset( i830ContextPtr i830,
+			     GLuint offset )
+{
+   i830->meta.Buffer[I830_DESTREG_CBUFADDR2] = offset;
+   i830->meta.emitted &= ~I830_UPLOAD_BUFFERS;
+}
+
+/* Setup an arbitary draw format, useful for targeting
+ * texture or agp memory.
+ */
+static void set_draw_format( i830ContextPtr i830,
+			     GLuint format,
+			     GLuint depth_format)
+{
+   i830->meta.Buffer[I830_DESTREG_DV1] = (DSTORG_HORT_BIAS(0x8) | /* .5 */
+					  DSTORG_VERT_BIAS(0x8) | /* .5 */
+					  format |
+					  DEPTH_IS_Z |
+					  depth_format);
+}
+
+
+static void set_vertex_format( i830ContextPtr i830 )
+{
+   i830->meta.Ctx[I830_CTXREG_VF] =  (_3DSTATE_VFT0_CMD |
+				      VFT0_TEX_COUNT(1) |
+				      VFT0_DIFFUSE |
+				      VFT0_SPEC |
+				      VFT0_XYZW);
+   i830->meta.Ctx[I830_CTXREG_VF2] = (_3DSTATE_VFT1_CMD |
+				      VFT1_TEX0_FMT(TEXCOORDFMT_2D) |
+				      VFT1_TEX1_FMT(TEXCOORDFMT_2D) | 
+				      VFT1_TEX2_FMT(TEXCOORDFMT_2D) |
+				      VFT1_TEX3_FMT(TEXCOORDFMT_2D));
+   i830->meta.emitted &= ~I830_UPLOAD_CTX;
+}
+
+
+static void draw_quad(i830ContextPtr i830, 
+		      GLfloat x0, GLfloat x1,
+		      GLfloat y0, GLfloat y1, 
+		      GLubyte red, GLubyte green,
+		      GLubyte blue, GLubyte alpha,
+		      GLfloat s0, GLfloat s1,
+		      GLfloat t0, GLfloat t1 )
+{
+   GLuint vertex_size = 8;
+   GLuint *vb = intelEmitInlinePrimitiveLocked( &i830->intel, 
+						PRIM3D_TRIFAN, 
+						4*vertex_size,
+						vertex_size );
+   intelVertex tmp;
+   int i;
+
+   
+/*    fprintf(stderr, "%s: %f,%f-%f,%f 0x%x%x%x%x %f,%f-%f,%f\n", */
+/* 	   __FUNCTION__, */
+/* 	   x0,y0,x1,y1,red,green,blue,alpha,s0,t0,s1,t1); */
+
+
+   /* initial vertex, left bottom */
+   tmp.v.x = x0;
+   tmp.v.y = y0;
+   tmp.v.z = 1.0;
+   tmp.v.w = 1.0;
+   tmp.v.color.red = red;
+   tmp.v.color.green = green;
+   tmp.v.color.blue = blue;
+   tmp.v.color.alpha = alpha;
+   tmp.v.specular.red = 0;
+   tmp.v.specular.green = 0;
+   tmp.v.specular.blue = 0;
+   tmp.v.specular.alpha = 0;
+   tmp.v.u0 = s0;
+   tmp.v.v0 = t0;
+   for (i = 0 ; i < 8 ; i++)
+      vb[i] = tmp.ui[i];
+
+   /* right bottom */
+   vb += 8;
+   tmp.v.x = x1;
+   tmp.v.u0 = s1;
+   for (i = 0 ; i < 8 ; i++)
+      vb[i] = tmp.ui[i];
+
+   /* right top */
+   vb += 8;
+   tmp.v.y = y1;
+   tmp.v.v0 = t1;
+   for (i = 0 ; i < 8 ; i++)
+      vb[i] = tmp.ui[i];
+
+   /* left top */
+   vb += 8;
+   tmp.v.x = x0;
+   tmp.v.u0 = s0;
+   for (i = 0 ; i < 8 ; i++)
+      vb[i] = tmp.ui[i];
+
+/*    fprintf(stderr, "%s: DV1: %x\n",  */
+/* 	   __FUNCTION__, i830->meta.Buffer[I830_DESTREG_DV1]); */
+}
+
+void 
+i830ClearWithTris(intelContextPtr intel, GLbitfield mask,
+		  GLboolean all,
+		  GLint cx, GLint cy, GLint cw, GLint ch)
+{
+   i830ContextPtr i830 = I830_CONTEXT( intel );
+   __DRIdrawablePrivate *dPriv = intel->driDrawable;
+   intelScreenPrivate *screen = intel->intelScreen;
+   int x0, y0, x1, y1;
+
+
+   SET_STATE( i830, meta );
+   set_initial_state( i830 );
+   set_no_texture( i830 );
+   set_vertex_format( i830 ); 
+
+   LOCK_HARDWARE(intel);
+
+   if(!all) {
+      x0 = cx;
+      y0 = cy;
+      x1 = x0 + cw;
+      y1 = y0 + ch;
+   } else {
+      x0 = 0;
+      y0 = 0;
+      x1 = x0 + dPriv->w;
+      y1 = y0 + dPriv->h;
+   }
+
+   /* Don't do any clipping to screen - these are window coordinates.
+    * The active cliprects will be applied as for any other geometry.
+    */
+
+   if(mask & DD_FRONT_LEFT_BIT) {
+      set_no_depth_stencil_write( i830 );
+      set_color_mask( i830, GL_TRUE );
+      set_draw_offset( i830, screen->frontOffset );
+      draw_quad(i830, x0, x1, y0, y1,
+		intel->clear_red, intel->clear_green,
+		intel->clear_blue, intel->clear_alpha,
+		0, 0, 0, 0);
+   }
+
+   if(mask & DD_BACK_LEFT_BIT) {
+      set_no_depth_stencil_write( i830 );
+      set_color_mask( i830, GL_TRUE );
+      set_draw_offset( i830, screen->backOffset );
+
+      draw_quad(i830, x0, x1, y0, y1,
+		intel->clear_red, intel->clear_green,
+		intel->clear_blue, intel->clear_alpha,
+		0, 0, 0, 0);
+   }
+
+   if(mask & DD_STENCIL_BIT) {
+      set_stencil_replace( i830, 
+			   intel->ctx.Stencil.WriteMask[0], 
+			   intel->ctx.Stencil.Clear);
+
+      set_color_mask( i830, GL_FALSE );
+      set_draw_offset( i830, screen->frontOffset );
+      draw_quad( i830, x0, x1, y0, y1, 0, 0, 0, 0, 0, 0, 0, 0 );
+   }
+
+   UNLOCK_HARDWARE(intel);
+
+   SET_STATE( i830, state );
+}
+
+
+
+
+GLboolean
+i830TryTextureReadPixels( GLcontext *ctx,
+			  GLint x, GLint y, GLsizei width, GLsizei height,
+			  GLenum format, GLenum type,
+			  const struct gl_pixelstore_attrib *pack,
+			  GLvoid *pixels )
+{
+   i830ContextPtr i830 = I830_CONTEXT(ctx);
+   intelContextPtr intel = INTEL_CONTEXT(ctx);
+   intelScreenPrivate *screen = i830->intel.intelScreen;
+   GLint pitch = pack->RowLength ? pack->RowLength : width;
+   __DRIdrawablePrivate *dPriv = i830->intel.driDrawable;
+   int textureFormat;
+   GLenum glTextureFormat;
+   int src_offset = i830->meta.Buffer[I830_DESTREG_CBUFADDR2];
+   int destOffset = intelAgpOffsetFromVirtual( &i830->intel, pixels);
+   int destFormat, depthFormat, destPitch;
+   drm_clip_rect_t tmp;
+
+   if (INTEL_DEBUG & DEBUG_PIXEL)
+      fprintf(stderr, "%s\n", __FUNCTION__);
+
+
+   if (	ctx->_ImageTransferState ||
+	pack->SwapBytes ||
+	pack->LsbFirst ||
+	!pack->Invert) {
+      fprintf(stderr, "%s: check_color failed\n", __FUNCTION__);
+      return GL_FALSE;
+   }
+
+   switch (screen->fbFormat) {
+   case DV_PF_565:
+      textureFormat = MAPSURF_16BIT | MT_16BIT_RGB565;
+      glTextureFormat = GL_RGB;
+      break;
+   case DV_PF_555:
+      textureFormat = MAPSURF_16BIT | MT_16BIT_ARGB1555;
+      glTextureFormat = GL_RGBA;
+      break;
+   case DV_PF_8888:
+      textureFormat = MAPSURF_32BIT | MT_32BIT_ARGB8888;
+      glTextureFormat = GL_RGBA;
+      break;
+   default:
+      fprintf(stderr, "%s: textureFormat failed %x\n", __FUNCTION__,
+	      screen->fbFormat);
+      return GL_FALSE;
+   }
+
+
+   switch (type) {
+   case GL_UNSIGNED_SHORT_5_6_5: 
+      if (format != GL_RGB) return GL_FALSE;
+      destFormat = COLR_BUF_RGB565; 
+      depthFormat = DEPTH_FRMT_16_FIXED;
+      destPitch = pitch * 2;
+      break;
+   case GL_UNSIGNED_INT_8_8_8_8_REV: 
+      if (format != GL_BGRA) return GL_FALSE;
+      destFormat = COLR_BUF_ARGB8888; 
+      depthFormat = DEPTH_FRMT_24_FIXED_8_OTHER;
+      destPitch = pitch * 4;
+      break;
+   default:
+      fprintf(stderr, "%s: destFormat failed %s\n", __FUNCTION__,
+	      _mesa_lookup_enum_by_nr(type));
+      return GL_FALSE;
+   }
+
+   destFormat |= (0x02<<24);
+
+/*    fprintf(stderr, "type: %s destFormat: %x\n", */
+/* 	   _mesa_lookup_enum_by_nr(type), */
+/* 	   destFormat); */
+
+   intelFlush( ctx );
+
+   SET_STATE( i830, meta );
+   set_initial_state( i830 );
+   set_no_depth_stencil_write( i830 );
+
+   LOCK_HARDWARE( intel );
+   {
+      intelWaitForIdle( intel ); /* required by GL */
+
+      if (!driClipRectToFramebuffer(ctx->ReadBuffer, &x, &y, &width, &height)) {
+	 UNLOCK_HARDWARE( intel );
+	 SET_STATE(i830, state);
+	 fprintf(stderr, "%s: cliprect failed\n", __FUNCTION__);
+	 return GL_TRUE;
+      }
+
+#if 0
+      /* FIXME -- Just emit the correct state
+       */
+      if (i830SetParam(i830->driFd, I830_SETPARAM_CBUFFER_PITCH, 
+		      destPitch) != 0) {
+	 UNLOCK_HARDWARE( intel );
+	 SET_STATE(i830, state);
+	 fprintf(stderr, "%s: setparam failed\n", __FUNCTION__);
+	 return GL_FALSE;
+      }
+#endif
+
+
+      y = dPriv->h - y - height;
+      x += dPriv->x;
+      y += dPriv->y;
+
+
+      /* Set the frontbuffer up as a large rectangular texture.
+       */
+      set_tex_rect_source( i830, 
+			   src_offset, 
+			   screen->width, 
+			   screen->height, 
+			   screen->frontPitch, 
+			   textureFormat ); 
+   
+   
+      enable_texture_blend_replace( i830, glTextureFormat ); 
+
+
+      /* Set the 3d engine to draw into the agp memory
+       */
+
+      set_draw_offset( i830, destOffset ); 
+      set_draw_format( i830, destFormat, depthFormat );  
+
+
+      /* Draw a single quad, no cliprects:
+       */
+      i830->intel.numClipRects = 1;
+      i830->intel.pClipRects = &tmp;
+      i830->intel.pClipRects[0].x1 = 0;
+      i830->intel.pClipRects[0].y1 = 0;
+      i830->intel.pClipRects[0].x2 = width;
+      i830->intel.pClipRects[0].y2 = height;
+
+      draw_quad( i830, 
+		 0, width, 0, height, 
+		 0, 255, 0, 0, 
+		 x, x+width, y, y+height );
+
+      intelWindowMoved( intel );
+   }
+   UNLOCK_HARDWARE( intel );
+   intelFinish( ctx ); /* required by GL */
+
+   SET_STATE( i830, state );
+   return GL_TRUE;
+}
+
+
+GLboolean
+i830TryTextureDrawPixels( GLcontext *ctx,
+			  GLint x, GLint y, GLsizei width, GLsizei height,
+			  GLenum format, GLenum type,
+			  const struct gl_pixelstore_attrib *unpack,
+			  const GLvoid *pixels )
+{
+   intelContextPtr intel = INTEL_CONTEXT(ctx);
+   i830ContextPtr i830 = I830_CONTEXT(ctx);
+   GLint pitch = unpack->RowLength ? unpack->RowLength : width;
+   __DRIdrawablePrivate *dPriv = intel->driDrawable;
+   int textureFormat;
+   GLenum glTextureFormat;
+   int dst_offset = i830->meta.Buffer[I830_DESTREG_CBUFADDR2];
+   int src_offset = intelAgpOffsetFromVirtual( intel, pixels );
+
+   if (INTEL_DEBUG & DEBUG_PIXEL)
+      fprintf(stderr, "%s\n", __FUNCTION__);
+
+   /* Todo -- upload images that aren't in agp space, then texture
+    * from them.  
+    */
+
+   if ( !intelIsAgpMemory( intel, pixels, pitch*height ) ) {
+      fprintf(stderr, "%s: intelIsAgpMemory failed\n", __FUNCTION__);
+      return GL_FALSE;
+   }
+
+   /* Todo -- don't want to clobber all the drawing state like we do
+    * for readpixels -- most of this state can be handled just fine.
+    */
+   if (	ctx->_ImageTransferState ||
+	unpack->SwapBytes ||
+	unpack->LsbFirst ||
+	ctx->Color.AlphaEnabled || 
+	ctx->Depth.Test ||
+	ctx->Fog.Enabled ||
+	ctx->Scissor.Enabled ||
+	ctx->Stencil.Enabled ||
+	!ctx->Color.ColorMask[0] ||
+	!ctx->Color.ColorMask[1] ||
+	!ctx->Color.ColorMask[2] ||
+	!ctx->Color.ColorMask[3] ||
+	ctx->Color.ColorLogicOpEnabled ||
+	ctx->Texture._EnabledUnits ||
+	ctx->Depth.OcclusionTest) {
+      fprintf(stderr, "%s: other tests failed\n", __FUNCTION__);
+      return GL_FALSE;
+   }
+
+   /* Todo -- remove these restrictions:
+    */
+   if (ctx->Pixel.ZoomX != 1.0F ||
+       ctx->Pixel.ZoomY != -1.0F)
+      return GL_FALSE;
+
+
+
+   switch (type) {
+   case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+      if (format != GL_BGRA) return GL_FALSE;
+      textureFormat = MAPSURF_16BIT | MT_16BIT_ARGB1555;
+      glTextureFormat = GL_RGBA;
+      break;
+   case GL_UNSIGNED_SHORT_5_6_5: 
+      if (format != GL_RGB) return GL_FALSE;
+      textureFormat = MAPSURF_16BIT | MT_16BIT_RGB565;
+      glTextureFormat = GL_RGB;
+      break;
+   case GL_UNSIGNED_SHORT_8_8_MESA: 
+      if (format != GL_YCBCR_MESA) return GL_FALSE;
+      textureFormat = (MAPSURF_422 | MT_422_YCRCB_SWAPY 
+/*  		       | TM0S1_COLORSPACE_CONVERSION */
+	 );
+      glTextureFormat = GL_YCBCR_MESA;
+      break;
+   case GL_UNSIGNED_SHORT_8_8_REV_MESA: 
+      if (format != GL_YCBCR_MESA) return GL_FALSE;
+      textureFormat = (MAPSURF_422 | MT_422_YCRCB_NORMAL 
+/* 		       | TM0S1_COLORSPACE_CONVERSION */
+	 );
+      glTextureFormat = GL_YCBCR_MESA;
+      break;
+   case GL_UNSIGNED_INT_8_8_8_8_REV: 
+      if (format != GL_BGRA) return GL_FALSE;
+      textureFormat = MAPSURF_32BIT | MT_32BIT_ARGB8888;
+      glTextureFormat = GL_RGBA;
+      break;
+   default:
+      fprintf(stderr, "%s: destFormat failed\n", __FUNCTION__);
+      return GL_FALSE;
+   }
+
+   intelFlush( ctx );
+
+   SET_STATE( i830, meta );
+
+   LOCK_HARDWARE( intel );
+   {
+      intelWaitForIdle( intel ); /* required by GL */
+
+      y -= height;			/* cope with pixel zoom */
+
+      if (!driClipRectToFramebuffer(ctx->ReadBuffer, &x, &y, &width, &height)) {
+	 UNLOCK_HARDWARE( intel );
+	 SET_STATE(i830, state);
+	 fprintf(stderr, "%s: cliprect failed\n", __FUNCTION__);
+	 return GL_TRUE;
+      }
+
+
+      y = dPriv->h - y - height;
+
+      set_initial_state( i830 );
+
+      /* Set the pixel image up as a rectangular texture.
+       */
+      set_tex_rect_source( i830, 
+			   src_offset, 
+			   width, 
+			   height, 
+			   pitch, /* XXXX!!!! -- /2 sometimes */
+			   textureFormat ); 
+   
+   
+      enable_texture_blend_replace( i830, glTextureFormat ); 
+
+   
+      /* Draw to the current draw buffer:
+       */
+      set_draw_offset( i830, dst_offset );
+
+      /* Draw a quad, use regular cliprects
+       */
+/*       fprintf(stderr, "x: %d y: %d width %d height %d\n", x, y, width, height); */
+
+      draw_quad( i830, 
+		 x, x+width, y, y+height,
+		 0, 255, 0, 0, 
+		 0, width, 0, height );
+
+      intelWindowMoved( intel );
+   }
+   UNLOCK_HARDWARE( intel );
+   intelFinish( ctx ); /* required by GL */
+   
+   SET_STATE(i830, state);
+
+   return GL_TRUE;
+}
+