Import texmem i915 driver to its new location as i915tex.

1 files changed, 350 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i915tex/intel_pixel_bitmap.c b/src/mesa/drivers/dri/i915tex/intel_pixel_bitmap.c
new file mode 100644
index 00000000000..65bf338589e
--- /dev/null
+++ b/src/mesa/drivers/dri/i915tex/intel_pixel_bitmap.c
@@ -0,0 +1,350 @@
+/**************************************************************************
+ * 
+ * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portionsalloc
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+#include "glheader.h"
+#include "enums.h"
+#include "image.h"
+#include "colormac.h"
+#include "mtypes.h"
+#include "macros.h"
+#include "bufferobj.h"
+#include "swrast/swrast.h"
+
+#include "intel_screen.h"
+#include "intel_context.h"
+#include "intel_ioctl.h"
+#include "intel_batchbuffer.h"
+#include "intel_blit.h"
+#include "intel_regions.h"
+#include "intel_buffer_objects.h"
+
+
+
+#define FILE_DEBUG_FLAG DEBUG_PIXEL
+
+
+/* Unlike the other intel_pixel_* functions, the expectation here is
+ * that the incoming data is not in a PBO.  With the XY_TEXT blit
+ * method, there's no benefit haveing it in a PBO, but we could
+ * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit
+ * PBO bitmaps.  I think they are probably pretty rare though - I
+ * wonder if Xgl uses them?
+ */
+static const GLubyte *map_pbo( GLcontext *ctx,
+			       GLsizei width, GLsizei height,
+			       const struct gl_pixelstore_attrib *unpack,
+			       const GLubyte *bitmap )
+{
+   GLubyte *buf;
+
+   if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
+				  GL_COLOR_INDEX, GL_BITMAP,
+				  (GLvoid *) bitmap)) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
+      return NULL;
+   }
+
+   buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+					   GL_READ_ONLY_ARB,
+					   unpack->BufferObj);
+   if (!buf) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
+      return NULL;
+   }
+
+   return ADD_POINTERS(buf, bitmap);
+}
+
+static GLboolean test_bit( const GLubyte *src,
+			    GLuint bit )
+{
+   return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
+}
+
+static void set_bit( GLubyte *dest,
+			  GLuint bit )
+{
+   dest[bit/8] |= 1 << (bit % 8);
+}
+
+static int align(int x, int align)
+{
+   return (x + align - 1) & ~(align - 1);
+}
+
+/* Extract a rectangle's worth of data from the bitmap.  Called
+ * per-cliprect.
+ */
+static GLuint get_bitmap_rect(GLsizei width, GLsizei height,
+			      const struct gl_pixelstore_attrib *unpack,
+			      const GLubyte *bitmap,
+			      GLuint x, GLuint y, 
+			      GLuint w, GLuint h,
+			      GLubyte *dest,
+			      GLuint row_align,
+			      GLboolean invert)
+{
+   GLuint src_offset = (x + unpack->SkipPixels) & 0x7;
+   GLuint mask = unpack->LsbFirst ? 0 : 7;
+   GLuint bit = 0;
+   GLint row, col;
+   GLint first, last;
+   GLint incr;
+   GLuint count = 0;
+
+   if (INTEL_DEBUG & DEBUG_PIXEL)
+      _mesa_printf("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
+		   __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask);
+
+   if (invert) {
+      first = h-1;
+      last = 0;
+      incr = -1;
+   }
+   else {
+      first = 0;
+      last = h-1;
+      incr = 1;
+   }
+
+   /* Require that dest be pre-zero'd.
+    */
+   for (row = first; row != (last+incr); row += incr) {
+      const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap, 
+						    width, height, 
+						    GL_COLOR_INDEX, GL_BITMAP, 
+						    y + row, x);
+
+      for (col = 0; col < w; col++, bit++) {
+	 if (test_bit(rowsrc, (col + src_offset) ^ mask)) {
+	    set_bit(dest, bit ^ 7);
+	    count++;
+	 }
+      }
+
+      if (row_align)
+	 bit = (bit + row_align - 1) & ~(row_align - 1);
+   }
+
+   return count;
+}
+
+
+
+
+/*
+ * Render a bitmap.
+ */
+static GLboolean
+do_blit_bitmap( GLcontext *ctx, 
+		GLint dstx, GLint dsty,
+		GLsizei width, GLsizei height,
+		const struct gl_pixelstore_attrib *unpack,
+		const GLubyte *bitmap )
+{
+   struct intel_context *intel = intel_context(ctx);
+   struct intel_region *dst = intel_drawbuf_region(intel);
+   
+   union {
+      GLuint ui;
+      GLubyte ub[4];
+   } color;
+
+
+   if (unpack->BufferObj->Name) {
+      bitmap = map_pbo(ctx, width, height, unpack, bitmap);
+      if (bitmap == NULL)
+	 return GL_TRUE;	/* even though this is an error, we're done */
+   }
+
+   UNCLAMPED_FLOAT_TO_CHAN(color.ub[0], ctx->Current.RasterColor[2]);
+   UNCLAMPED_FLOAT_TO_CHAN(color.ub[1], ctx->Current.RasterColor[1]);
+   UNCLAMPED_FLOAT_TO_CHAN(color.ub[2], ctx->Current.RasterColor[0]);
+   UNCLAMPED_FLOAT_TO_CHAN(color.ub[3], ctx->Current.RasterColor[3]);
+
+   /* Does zoom apply to bitmaps?
+    */
+   if (!intel_check_blit_fragment_ops(ctx) ||
+       ctx->Pixel.ZoomX != 1.0F || 
+       ctx->Pixel.ZoomY != 1.0F)
+      return GL_FALSE;
+
+   LOCK_HARDWARE(intel);
+
+   if (intel->driDrawable->numClipRects) {
+      __DRIdrawablePrivate *dPriv = intel->driDrawable;
+      drm_clip_rect_t *box = dPriv->pClipRects;
+      drm_clip_rect_t dest_rect;
+      GLint nbox = dPriv->numClipRects;
+      GLint srcx = 0, srcy = 0;
+      GLint orig_screen_x1, orig_screen_y2;
+      GLuint i;
+
+
+      orig_screen_x1 = dPriv->x + dstx;
+      orig_screen_y2 = dPriv->y + (dPriv->h - dsty);
+
+      /* Do scissoring in GL coordinates:
+       */
+x      if (ctx->Scissor.Enabled)
+      {
+	 GLint x = ctx->Scissor.X;
+	 GLint y = ctx->Scissor.Y;
+	 GLuint w = ctx->Scissor.Width;
+	 GLuint h = ctx->Scissor.Height;
+
+         if (!_mesa_clip_to_region(x, y, x+w-1, y+h-1, &dstx, &dsty, &width, &height))
+            goto out;
+      }
+
+      /* Convert from GL to hardware coordinates:
+       */
+      dsty = dPriv->y + (dPriv->h - dsty - height);  
+      dstx = dPriv->x + dstx;
+
+      dest_rect.x1 = dstx;
+      dest_rect.y1 = dsty;
+      dest_rect.x2 = dstx + width;
+      dest_rect.y2 = dsty + height;
+
+      for (i = 0; i < nbox; i++) {
+         drm_clip_rect_t rect;
+	 int box_w, box_h;
+	 GLint px, py;
+	 GLuint stipple[32];  
+
+         if (!intel_intersect_cliprects(&rect, &dest_rect, &box[i]))
+            continue;
+
+	 /* Now go back to GL coordinates to figure out what subset of
+	  * the bitmap we are uploading for this cliprect:
+	  */
+	 box_w = rect.x2 - rect.x1;
+	 box_h = rect.y2 - rect.y1;
+	 srcx = rect.x1 - orig_screen_x1;
+	 srcy = orig_screen_y2 - rect.y2;
+
+
+#define DY 32
+#define DX 32
+
+	 /* Then, finally, chop it all into chunks that can be
+	  * digested by hardware:
+	  */
+	 for (py = 0; py < box_h; py += DY) { 
+	    for (px = 0; px < box_w; px += DX) { 
+	       int h = MIN2(DY, box_h - py);
+	       int w = MIN2(DX, box_w - px); 
+	       GLuint sz = align(align(w,8) * h, 64)/8;
+	    
+	       assert(sz <= sizeof(stipple));
+	       memset(stipple, 0, sz);
+
+	       /* May need to adjust this when padding has been introduced in
+		* sz above:
+		*/
+	       if (get_bitmap_rect(width, height, unpack, 
+				   bitmap,
+				   srcx + px, srcy + py, w, h,
+				   (GLubyte *)stipple,
+				   8,
+				   GL_TRUE) == 0)
+		  continue;
+
+	       /* 
+		*/
+	       intelEmitImmediateColorExpandBlit( intel,
+						  dst->cpp,
+						  (GLubyte *)stipple, 
+						  sz,
+						  color.ui,
+						  dst->pitch,
+						  dst->buffer,
+						  0,
+						  dst->tiled,
+						  rect.x1 + px,
+						  rect.y2 - (py + h),
+						  w, h);
+	    } 
+	 } 
+      }
+      intel->need_flush = GL_TRUE;
+   out:
+      intel_batchbuffer_flush(intel->batch);
+   }
+   UNLOCK_HARDWARE(intel);
+
+
+   if (unpack->BufferObj->Name) {
+      /* done with PBO so unmap it now */
+      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+                              unpack->BufferObj);
+   }
+
+   return GL_TRUE;
+}
+
+
+
+
+
+/* There are a large number of possible ways to implement bitmap on
+ * this hardware, most of them have some sort of drawback.  Here are a
+ * few that spring to mind:
+ * 
+ * Blit:
+ *    - XY_MONO_SRC_BLT_CMD
+ *         - use XY_SETUP_CLIP_BLT for cliprect clipping.
+ *    - XY_TEXT_BLT
+ *    - XY_TEXT_IMMEDIATE_BLT
+ *         - blit per cliprect, subject to maximum immediate data size.
+ *    - XY_COLOR_BLT 
+ *         - per pixel or run of pixels
+ *    - XY_PIXEL_BLT
+ *         - good for sparse bitmaps
+ *
+ * 3D engine:
+ *    - Point per pixel
+ *    - Translate bitmap to an alpha texture and render as a quad
+ *    - Chop bitmap up into 32x32 squares and render w/polygon stipple.
+ */
+void
+intelBitmap(GLcontext * ctx,
+	    GLint x, GLint y,
+	    GLsizei width, GLsizei height,
+	    const struct gl_pixelstore_attrib *unpack,
+	    const GLubyte * pixels)
+{
+   if (do_blit_bitmap(ctx, x, y, width, height,
+                          unpack, pixels))
+      return;
+
+   if (INTEL_DEBUG & DEBUG_PIXEL)
+      _mesa_printf("%s: fallback to swrast\n", __FUNCTION__);
+
+   _swrast_Bitmap(ctx, x, y, width, height, unpack, pixels);
+}