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Diffstat (limited to 'src/mesa/drivers/dri/i915/intel_pixel.c')
-rw-r--r--src/mesa/drivers/dri/i915/intel_pixel.c507
1 files changed, 507 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i915/intel_pixel.c b/src/mesa/drivers/dri/i915/intel_pixel.c
new file mode 100644
index 00000000000..aaafe84a6a0
--- /dev/null
+++ b/src/mesa/drivers/dri/i915/intel_pixel.c
@@ -0,0 +1,507 @@
+/**************************************************************************
+ *
+ * Copyright 2003 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 portions
+ * 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 "mtypes.h"
+#include "macros.h"
+#include "swrast/swrast.h"
+
+#include "intel_screen.h"
+#include "intel_context.h"
+#include "intel_ioctl.h"
+#include "intel_batchbuffer.h"
+
+
+
+static GLboolean
+check_color( const GLcontext *ctx, GLenum type, GLenum format,
+ const struct gl_pixelstore_attrib *packing,
+ const void *pixels, GLint sz, GLint pitch )
+{
+ intelContextPtr intel = INTEL_CONTEXT(ctx);
+ GLuint cpp = intel->intelScreen->cpp;
+
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ fprintf(stderr, "%s\n", __FUNCTION__);
+
+ if ( (pitch & 63) ||
+ ctx->_ImageTransferState ||
+ packing->SwapBytes ||
+ packing->LsbFirst) {
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ fprintf(stderr, "%s: failed 1\n", __FUNCTION__);
+ return GL_FALSE;
+ }
+
+ if ( type == GL_UNSIGNED_INT_8_8_8_8_REV &&
+ cpp == 4 &&
+ format == GL_BGRA ) {
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ fprintf(stderr, "%s: passed 2\n", __FUNCTION__);
+ return GL_TRUE;
+ }
+
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ fprintf(stderr, "%s: failed\n", __FUNCTION__);
+
+ return GL_FALSE;
+}
+
+static GLboolean
+check_color_per_fragment_ops( const GLcontext *ctx )
+{
+ int result;
+ result = (!( 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->Current.RasterPosValid);
+
+ return result;
+}
+
+
+/**
+ * Clip the given rectangle against the buffer's bounds (including scissor).
+ * \param size returns the
+ * \return GL_TRUE if any pixels remain, GL_FALSE if totally clipped.
+ *
+ * XXX Replace this with _mesa_clip_drawpixels() and _mesa_clip_readpixels()
+ * from Mesa 6.4. We shouldn't apply scissor for ReadPixels.
+ */
+static GLboolean
+clip_pixelrect( const GLcontext *ctx,
+ const GLframebuffer *buffer,
+ GLint *x, GLint *y,
+ GLsizei *width, GLsizei *height)
+{
+ /* left clipping */
+ if (*x < buffer->_Xmin) {
+ *width -= (buffer->_Xmin - *x);
+ *x = buffer->_Xmin;
+ }
+
+ /* right clipping */
+ if (*x + *width > buffer->_Xmax)
+ *width -= (*x + *width - buffer->_Xmax - 1);
+
+ if (*width <= 0)
+ return GL_FALSE;
+
+ /* bottom clipping */
+ if (*y < buffer->_Ymin) {
+ *height -= (buffer->_Ymin - *y);
+ *y = buffer->_Ymin;
+ }
+
+ /* top clipping */
+ if (*y + *height > buffer->_Ymax)
+ *height -= (*y + *height - buffer->_Ymax - 1);
+
+ if (*height <= 0)
+ return GL_FALSE;
+
+ return GL_TRUE;
+}
+
+
+/**
+ * Compute intersection of a clipping rectangle and pixel rectangle,
+ * returning results in x/y/w/hOut vars.
+ * \return GL_TRUE if there's intersection, GL_FALSE if disjoint.
+ */
+static INLINE GLboolean
+intersect_region(const drm_clip_rect_t *box,
+ GLint x, GLint y, GLsizei width, GLsizei height,
+ GLint *xOut, GLint *yOut, GLint *wOut, GLint *hOut)
+{
+ GLint bx = box->x1;
+ GLint by = box->y1;
+ GLint bw = box->x2 - bx;
+ GLint bh = box->y2 - by;
+
+ if (bx < x) bw -= x - bx, bx = x;
+ if (by < y) bh -= y - by, by = y;
+ if (bx + bw > x + width) bw = x + width - bx;
+ if (by + bh > y + height) bh = y + height - by;
+ if (bw <= 0) return GL_FALSE;
+ if (bh <= 0) return GL_FALSE;
+
+ *xOut = bx;
+ *yOut = by;
+ *wOut = bw;
+ *hOut = bh;
+ return GL_TRUE;
+}
+
+
+
+static GLboolean
+intelTryReadPixels( GLcontext *ctx,
+ GLint x, GLint y, GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ const struct gl_pixelstore_attrib *pack,
+ GLvoid *pixels )
+{
+ intelContextPtr intel = INTEL_CONTEXT(ctx);
+ GLint size = 0; /* not really used */
+ GLint pitch = pack->RowLength ? pack->RowLength : width;
+
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ fprintf(stderr, "%s\n", __FUNCTION__);
+
+ /* Only accelerate reading to agp buffers.
+ */
+ if ( !intelIsAgpMemory(intel, pixels,
+ pitch * height * intel->intelScreen->cpp ) ) {
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ fprintf(stderr, "%s: dest not agp\n", __FUNCTION__);
+ return GL_FALSE;
+ }
+
+ /* Need GL_PACK_INVERT_MESA to cope with upsidedown results from
+ * blitter:
+ */
+ if (!pack->Invert) {
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ fprintf(stderr, "%s: MESA_PACK_INVERT not set\n", __FUNCTION__);
+ return GL_FALSE;
+ }
+
+ if (!check_color(ctx, type, format, pack, pixels, size, pitch))
+ return GL_FALSE;
+
+ switch ( intel->intelScreen->cpp ) {
+ case 4:
+ break;
+ default:
+ return GL_FALSE;
+ }
+
+
+ /* Although the blits go on the command buffer, need to do this and
+ * fire with lock held to guarentee cliprects and drawing offset are
+ * correct.
+ *
+ * This is an unusual situation however, as the code which flushes
+ * a full command buffer expects to be called unlocked. As a
+ * workaround, immediately flush the buffer on aquiring the lock.
+ */
+ intelFlush( &intel->ctx );
+ LOCK_HARDWARE( intel );
+ {
+ __DRIdrawablePrivate *dPriv = intel->driDrawable;
+ int nbox = dPriv->numClipRects;
+ int src_offset = intel->readRegion->offset;
+ int src_pitch = intel->intelScreen->front.pitch;
+ int dst_offset = intelAgpOffsetFromVirtual( intel, pixels);
+ drm_clip_rect_t *box = dPriv->pClipRects;
+ int i;
+
+ assert(dst_offset != ~0); /* should have been caught above */
+
+ if (!clip_pixelrect(ctx, ctx->ReadBuffer, &x, &y, &width, &height)) {
+ UNLOCK_HARDWARE( intel );
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ fprintf(stderr, "%s totally clipped -- nothing to do\n",
+ __FUNCTION__);
+ return GL_TRUE;
+ }
+
+ /* convert to screen coords (y=0=top) */
+ y = dPriv->h - y - height;
+ x += dPriv->x;
+ y += dPriv->y;
+
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ fprintf(stderr, "readpixel blit src_pitch %d dst_pitch %d\n",
+ src_pitch, pitch);
+
+ /* We don't really have to do window clipping for readpixels.
+ * The OpenGL spec says that pixels read from outside the
+ * visible window region (pixel ownership) have undefined value.
+ */
+ for (i = 0 ; i < nbox ; i++)
+ {
+ GLint bx, by, bw, bh;
+ if (intersect_region(box+i, x, y, width, height,
+ &bx, &by, &bw, &bh)) {
+ intelEmitCopyBlitLocked( intel,
+ intel->intelScreen->cpp,
+ src_pitch, src_offset,
+ pitch, dst_offset,
+ bx, by,
+ bx - x, by - y,
+ bw, bh );
+ }
+ }
+ }
+ UNLOCK_HARDWARE( intel );
+ intelFinish( &intel->ctx );
+
+ return GL_TRUE;
+}
+
+static void
+intelReadPixels( GLcontext *ctx,
+ GLint x, GLint y, GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ const struct gl_pixelstore_attrib *pack,
+ GLvoid *pixels )
+{
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ fprintf(stderr, "%s\n", __FUNCTION__);
+
+ if (!intelTryReadPixels( ctx, x, y, width, height, format, type, pack,
+ pixels))
+ _swrast_ReadPixels( ctx, x, y, width, height, format, type, pack,
+ pixels);
+}
+
+
+
+
+static void do_draw_pix( GLcontext *ctx,
+ GLint x, GLint y, GLsizei width, GLsizei height,
+ GLint pitch,
+ const void *pixels,
+ GLuint dest )
+{
+ intelContextPtr intel = INTEL_CONTEXT(ctx);
+ __DRIdrawablePrivate *dPriv = intel->driDrawable;
+ drm_clip_rect_t *box = dPriv->pClipRects;
+ int nbox = dPriv->numClipRects;
+ int i;
+ int src_offset = intelAgpOffsetFromVirtual( intel, pixels);
+ int src_pitch = pitch;
+
+ assert(src_offset != ~0); /* should be caught earlier */
+
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ fprintf(stderr, "%s\n", __FUNCTION__);
+
+ intelFlush( &intel->ctx );
+ LOCK_HARDWARE( intel );
+ if (ctx->DrawBuffer)
+ {
+ y -= height; /* cope with pixel zoom */
+
+ if (!clip_pixelrect(ctx, ctx->DrawBuffer,
+ &x, &y, &width, &height)) {
+ UNLOCK_HARDWARE( intel );
+ return;
+ }
+
+ y = dPriv->h - y - height; /* convert from gl to hardware coords */
+ x += dPriv->x;
+ y += dPriv->y;
+
+ for (i = 0 ; i < nbox ; i++ )
+ {
+ GLint bx, by, bw, bh;
+ if (intersect_region(box + i, x, y, width, height,
+ &bx, &by, &bw, &bh)) {
+ intelEmitCopyBlitLocked( intel,
+ intel->intelScreen->cpp,
+ src_pitch, src_offset,
+ intel->intelScreen->front.pitch,
+ intel->drawRegion->offset,
+ bx - x, by - y,
+ bx, by,
+ bw, bh );
+ }
+ }
+ }
+ UNLOCK_HARDWARE( intel );
+ intelFinish( &intel->ctx );
+}
+
+
+
+static GLboolean
+intelTryDrawPixels( 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);
+ GLint pitch = unpack->RowLength ? unpack->RowLength : width;
+ GLuint dest;
+ GLuint cpp = intel->intelScreen->cpp;
+ GLint size = width * pitch * cpp;
+
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ fprintf(stderr, "%s\n", __FUNCTION__);
+
+ switch (format) {
+ case GL_RGB:
+ case GL_RGBA:
+ case GL_BGRA:
+ dest = intel->drawRegion->offset;
+
+ /* Planemask doesn't have full support in blits.
+ */
+ if (!ctx->Color.ColorMask[RCOMP] ||
+ !ctx->Color.ColorMask[GCOMP] ||
+ !ctx->Color.ColorMask[BCOMP] ||
+ !ctx->Color.ColorMask[ACOMP]) {
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ fprintf(stderr, "%s: planemask\n", __FUNCTION__);
+ return GL_FALSE;
+ }
+
+ /* Can't do conversions on agp reads/draws.
+ */
+ if ( !intelIsAgpMemory( intel, pixels, size ) ) {
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ fprintf(stderr, "%s: not agp memory\n", __FUNCTION__);
+ return GL_FALSE;
+ }
+
+ if (!check_color(ctx, type, format, unpack, pixels, size, pitch)) {
+ return GL_FALSE;
+ }
+ if (!check_color_per_fragment_ops(ctx)) {
+ return GL_FALSE;
+ }
+
+ if (ctx->Pixel.ZoomX != 1.0F ||
+ ctx->Pixel.ZoomY != -1.0F)
+ return GL_FALSE;
+ break;
+
+ default:
+ return GL_FALSE;
+ }
+
+ if ( intelIsAgpMemory(intel, pixels, size) )
+ {
+ do_draw_pix( ctx, x, y, width, height, pitch, pixels, dest );
+ return GL_TRUE;
+ }
+ else if (0)
+ {
+ /* Pixels is in regular memory -- get dma buffers and perform
+ * upload through them. No point doing this for regular uploads
+ * but once we remove some of the restrictions above (colormask,
+ * pixelformat conversion, zoom?, etc), this could be a win.
+ */
+ }
+ else
+ return GL_FALSE;
+}
+
+static void
+intelDrawPixels( GLcontext *ctx,
+ GLint x, GLint y, GLsizei width, GLsizei height,
+ GLenum format, GLenum type,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLvoid *pixels )
+{
+ if (INTEL_DEBUG & DEBUG_PIXEL)
+ fprintf(stderr, "%s\n", __FUNCTION__);
+
+ if (!intelTryDrawPixels( ctx, x, y, width, height, format, type,
+ unpack, pixels ))
+ _swrast_DrawPixels( ctx, x, y, width, height, format, type,
+ unpack, pixels );
+}
+
+
+
+
+/**
+ * Implement glCopyPixels for the front color buffer (or back buffer Pixmap)
+ * for the color buffer. Don't support zooming, pixel transfer, etc.
+ * We do support copying from one window to another, ala glXMakeCurrentRead.
+ */
+static void
+intelCopyPixels( GLcontext *ctx,
+ GLint srcx, GLint srcy, GLsizei width, GLsizei height,
+ GLint destx, GLint desty, GLenum type )
+{
+#if 0
+ const XMesaContext xmesa = XMESA_CONTEXT(ctx);
+ const SWcontext *swrast = SWRAST_CONTEXT( ctx );
+ XMesaDisplay *dpy = xmesa->xm_visual->display;
+ const XMesaDrawable drawBuffer = xmesa->xm_draw_buffer->buffer;
+ const XMesaDrawable readBuffer = xmesa->xm_read_buffer->buffer;
+ const XMesaGC gc = xmesa->xm_draw_buffer->gc;
+
+ ASSERT(dpy);
+ ASSERT(gc);
+
+ if (drawBuffer && /* buffer != 0 means it's a Window or Pixmap */
+ readBuffer &&
+ type == GL_COLOR &&
+ (swrast->_RasterMask & ~CLIP_BIT) == 0 && /* no blend, z-test, etc */
+ ctx->_ImageTransferState == 0 && /* no color tables, scale/bias, etc */
+ ctx->Pixel.ZoomX == 1.0 && /* no zooming */
+ ctx->Pixel.ZoomY == 1.0) {
+ /* Note: we don't do any special clipping work here. We could,
+ * but X will do it for us.
+ */
+ srcy = FLIP(xmesa->xm_read_buffer, srcy) - height + 1;
+ desty = FLIP(xmesa->xm_draw_buffer, desty) - height + 1;
+ XCopyArea(dpy, readBuffer, drawBuffer, gc,
+ srcx, srcy, width, height, destx, desty);
+ }
+#else
+ _swrast_CopyPixels(ctx, srcx, srcy, width, height, destx, desty, type );
+#endif
+}
+
+
+
+
+void intelInitPixelFuncs( struct dd_function_table *functions )
+{
+ /* Pixel path fallbacks.
+ */
+ functions->Accum = _swrast_Accum;
+ functions->Bitmap = _swrast_Bitmap;
+ functions->CopyPixels = intelCopyPixels;
+
+ if (!getenv("INTEL_NO_BLITS")) {
+ functions->ReadPixels = intelReadPixels;
+ functions->DrawPixels = intelDrawPixels;
+ }
+ else {
+ functions->ReadPixels = _swrast_ReadPixels;
+ functions->DrawPixels = _swrast_DrawPixels;
+ }
+}
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