--- /dev/null
+/**************************************************************************
+ *
+ * Copyright 2006 VMware, Inc.
+ * 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 VMWARE 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 "main/glheader.h"
+#include "main/enums.h"
+#include "main/image.h"
+#include "main/colormac.h"
+#include "main/condrender.h"
+#include "main/mtypes.h"
+#include "main/macros.h"
+#include "main/pbo.h"
+#include "main/bufferobj.h"
+#include "main/state.h"
+#include "main/texobj.h"
+#include "main/context.h"
+#include "main/fbobject.h"
+#include "swrast/swrast.h"
+#include "drivers/common/meta.h"
+
+#include "intel_screen.h"
+#include "intel_context.h"
+#include "intel_batchbuffer.h"
+#include "intel_blit.h"
+#include "intel_fbo.h"
+#include "intel_regions.h"
+#include "intel_buffers.h"
+#include "intel_pixel.h"
+#include "intel_reg.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( struct gl_context *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,
+ INT_MAX, (const GLvoid *) bitmap)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
+ return NULL;
+ }
+
+ buf = (GLubyte *) ctx->Driver.MapBufferRange(ctx, 0, unpack->BufferObj->Size,
+ GL_MAP_READ_BIT,
+ unpack->BufferObj,
+ MAP_INTERNAL);
+ if (!buf) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
+ return NULL;
+ }
+
+ return ADD_POINTERS(buf, bitmap);
+}
+
+static bool 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);
+}
+
+/* Extract a rectangle's worth of data from the bitmap. Called
+ * per chunk of HW-sized bitmap.
+ */
+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,
+ bool 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;
+
+ DBG("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
+ __func__, 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 = ALIGN(bit, row_align);
+ }
+
+ return count;
+}
+
+/**
+ * Returns the low Y value of the vertical range given, flipped according to
+ * whether the framebuffer is or not.
+ */
+static inline int
+y_flip(struct gl_framebuffer *fb, int y, int height)
+{
+ if (_mesa_is_user_fbo(fb))
+ return y;
+ else
+ return fb->Height - y - height;
+}
+
+/*
+ * Render a bitmap.
+ */
+static bool
+do_blit_bitmap( struct gl_context *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 gl_framebuffer *fb = ctx->DrawBuffer;
+ struct intel_renderbuffer *irb;
+ GLfloat tmpColor[4];
+ GLubyte ubcolor[4];
+ GLuint color;
+ GLsizei bitmap_width = width;
+ GLsizei bitmap_height = height;
+ GLint px, py;
+ GLuint stipple[32];
+ GLint orig_dstx = dstx;
+ GLint orig_dsty = dsty;
+
+ /* Update draw buffer bounds */
+ _mesa_update_state(ctx);
+
+ if (ctx->Depth.Test) {
+ /* The blit path produces incorrect results when depth testing is on.
+ * It seems the blit Z coord is always 1.0 (the far plane) so fragments
+ * will likely be obscured by other, closer geometry.
+ */
+ return false;
+ }
+
+ intel_prepare_render(intel);
+
+ if (fb->_NumColorDrawBuffers != 1) {
+ perf_debug("accelerated glBitmap() only supports rendering to a "
+ "single color buffer\n");
+ return false;
+ }
+
+ irb = intel_renderbuffer(fb->_ColorDrawBuffers[0]);
+
+ if (_mesa_is_bufferobj(unpack->BufferObj)) {
+ bitmap = map_pbo(ctx, width, height, unpack, bitmap);
+ if (bitmap == NULL)
+ return true; /* even though this is an error, we're done */
+ }
+
+ COPY_4V(tmpColor, ctx->Current.RasterColor);
+
+ if (_mesa_need_secondary_color(ctx)) {
+ ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor);
+ }
+
+ UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]);
+ UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]);
+ UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]);
+ UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]);
+
+ switch (irb->mt->format) {
+ case MESA_FORMAT_B8G8R8A8_UNORM:
+ case MESA_FORMAT_B8G8R8X8_UNORM:
+ color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]);
+ break;
+ case MESA_FORMAT_B5G6R5_UNORM:
+ color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]);
+ break;
+ default:
+ perf_debug("Unsupported format %s in accelerated glBitmap()\n",
+ _mesa_get_format_name(irb->mt->format));
+ return false;
+ }
+
+ if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F))
+ return false;
+
+ /* Clip to buffer bounds and scissor. */
+ if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
+ fb->_Xmax, fb->_Ymax,
+ &dstx, &dsty, &width, &height))
+ goto out;
+
+ dsty = y_flip(fb, dsty, height);
+
+#define DY 32
+#define DX 32
+
+ /* Chop it all into chunks that can be digested by hardware: */
+ for (py = 0; py < height; py += DY) {
+ for (px = 0; px < width; px += DX) {
+ int h = MIN2(DY, height - py);
+ int w = MIN2(DX, width - px);
+ GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;
+ const enum gl_logicop_mode logic_op = ctx->Color.ColorLogicOpEnabled ?
+ ctx->Color._LogicOp : COLOR_LOGICOP_COPY;
+
+ assert(sz <= sizeof(stipple));
+ memset(stipple, 0, sz);
+
+ /* May need to adjust this when padding has been introduced in
+ * sz above:
+ *
+ * Have to translate destination coordinates back into source
+ * coordinates.
+ */
+ int count = get_bitmap_rect(bitmap_width, bitmap_height, unpack,
+ bitmap,
+ -orig_dstx + (dstx + px),
+ -orig_dsty + y_flip(fb, dsty + py, h),
+ w, h,
+ (GLubyte *)stipple,
+ 8,
+ _mesa_is_winsys_fbo(fb));
+ if (count == 0)
+ continue;
+
+ if (!intelEmitImmediateColorExpandBlit(intel,
+ irb->mt->cpp,
+ (GLubyte *)stipple,
+ sz,
+ color,
+ irb->mt->region->pitch,
+ irb->mt->region->bo,
+ 0,
+ irb->mt->region->tiling,
+ dstx + px,
+ dsty + py,
+ w, h,
+ logic_op)) {
+ return false;
+ }
+
+ if (ctx->Query.CurrentOcclusionObject)
+ ctx->Query.CurrentOcclusionObject->Result += count;
+ }
+ }
+out:
+
+ if (unlikely(INTEL_DEBUG & DEBUG_SYNC))
+ intel_batchbuffer_flush(intel);
+
+ if (_mesa_is_bufferobj(unpack->BufferObj)) {
+ /* done with PBO so unmap it now */
+ ctx->Driver.UnmapBuffer(ctx, unpack->BufferObj, MAP_INTERNAL);
+ }
+
+ intel_check_front_buffer_rendering(intel);
+
+ return 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(struct gl_context * ctx,
+ GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLubyte * pixels)
+{
+ if (!_mesa_check_conditional_render(ctx))
+ return;
+
+ if (do_blit_bitmap(ctx, x, y, width, height,
+ unpack, pixels))
+ return;
+
+ _mesa_meta_Bitmap(ctx, x, y, width, height, unpack, pixels);
+}
projects / mesa.git / blobdiff