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Diffstat (limited to 'src/mesa/drivers/dri/i915tex/intel_pixel_bitmap.c')
-rw-r--r--src/mesa/drivers/dri/i915tex/intel_pixel_bitmap.c350
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);
+}
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