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/**
* \file radeon_subset_bitmap.c
* \brief Bitmap drawing.
*
* \author Keith Whitwell <keith@tungstengraphics.com>
*/
/*
* Copyright 2003 ATI Technologies Inc., Ontario, Canada, and
* 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
* on 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
* ATI, TUNGSTEN GRAPHICS AND/OR THEIR 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.
*
*/
/* $XFree86$ */
#include "glheader.h"
#include "mtypes.h"
#include "colormac.h"
#include "context.h"
#include "enums.h"
#include "imports.h"
#include "image.h"
/*#include "mmath.h"*/
#include "macros.h"
#include "state.h"
#include "radeon_context.h"
#include "radeon_ioctl.h"
#include "radeon_state.h"
#include "radeon_subset.h"
/**
* \brief Cope with depth operations by drawing individual pixels as points
*
* \param xorig x coordinate of the bitmap corner.
* \param yorig y coordinate of the bitmap corner.
* \param xmove increment to the final x coordinate.
* \param ymove increment to the final y coordinate.
* \param width bitmap width.
* \param height bitmap height.
* \param bitmap bitmap pointer.
*
* Clips the bitmap coordinates and adjusts for windows coordinates. Draws the
* bitmap with glPoints(), turning off TCL and hardware viewport transformation
* to emit raw pixel coordinates. Finally fires any outstanding vertices and
* restores TCL, viewport, texture and color states.
*/
void
radeonPointsBitmap( GLsizei width, GLsizei height,
GLfloat xorig, GLfloat yorig,
GLfloat xmove, GLfloat ymove,
const GLubyte *bitmap )
{
GET_CURRENT_CONTEXT(ctx);
GLsizei bmwidth = width, bmheight = height;
GLint px, py;
radeonContextPtr rmesa = RADEON_CONTEXT(ctx);
GLfloat saved_color[4], saved_tex0[2];
GLint row, col;
GLuint orig_se_cntl;
GLuint w, h;
const struct gl_pixelstore_attrib *unpack = &ctx->Unpack;
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
if (width < 0 || height < 0) {
_mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
return;
}
if (!ctx->Current.RasterPosValid)
return;
if (ctx->NewState)
_mesa_update_state(ctx);
if (ctx->_RotateMode) {
width = bmheight; height = bmwidth;
px = IFLOOR(ctx->Current.RasterPos[0] + yorig);
py = IFLOOR(ctx->Current.RasterPos[1] + xorig);
ctx->Current.RasterPos[0] += ymove;
ctx->Current.RasterPos[1] += xmove;
}
else {
px = IFLOOR(ctx->Current.RasterPos[0] - xorig);
py = IFLOOR(ctx->Current.RasterPos[1] - yorig);
ctx->Current.RasterPos[0] += xmove;
ctx->Current.RasterPos[1] += ymove;
}
/* Turn off tcl and the hw viewport transformation so that we can
* emit raw pixel coordinates:
*/
radeonSubsetVtxEnableTCL( rmesa, GL_FALSE );
RADEON_STATECHANGE( rmesa, set );
orig_se_cntl = rmesa->hw.set.cmd[SET_SE_CNTL];
rmesa->hw.set.cmd[SET_SE_CNTL] &= ~(RADEON_VPORT_XY_XFORM_ENABLE |
RADEON_VPORT_Z_XFORM_ENABLE);
/* Adjust for window coordinates, flip y values:
*/
h = rmesa->dri.drawable->h + rmesa->dri.drawable->y - 1;
w = rmesa->dri.drawable->w;
px += rmesa->dri.drawable->x;
/* Save current color, texcoord to restore later:
*/
COPY_4V( saved_color, ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
COPY_2V( saved_tex0, ctx->Current.Attrib[VERT_ATTRIB_TEX0] );
/* Just use the GL entrypoints to talk to radeon_subset_vtx.c:
*/
glBegin( GL_POINTS );
glColor4fv( ctx->Current.RasterColor );
glTexCoord2fv( ctx->Current.RasterTexCoords[0] );
if (ctx->_RotateMode) {
for (col=0; col<width; col++) {
const GLubyte *src = (const GLubyte *)
_mesa_image_address( unpack, bitmap, height, width,
GL_COLOR_INDEX, GL_BITMAP, 0, col, 0 );
/* Msb first */
GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
for (row=0; row<height; row++) {
if (*src & mask) {
glVertex2f( px-col, h - (py + row) );
}
src += mask & 1;
mask = ((mask << 7) & 0xff) | (mask >> 1);
}
/* get ready for next row */
if (mask != 128)
src++;
}
}
else {
for (row=0; row<height; row++) {
const GLubyte *src = (const GLubyte *)
_mesa_image_address( unpack, bitmap, width, height,
GL_COLOR_INDEX, GL_BITMAP, 0, row, 0 );
/* Msb first */
GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
for (col=0; col<width; col++) {
if (*src & mask) {
glVertex2f( px+col, h - (py + row) );
}
src += mask & 1;
mask = ((mask << 7) & 0xff) | (mask >> 1);
}
/* get ready for next row */
if (mask != 128)
src++;
}
}
glEnd();
glColor4fv( saved_color );
glTexCoord2fv( saved_tex0 );
/* Fire outstanding vertices, restore state
*/
RADEON_STATECHANGE( rmesa, set );
rmesa->hw.set.cmd[SET_SE_CNTL] = orig_se_cntl;
radeonSubsetVtxEnableTCL( rmesa, GL_TRUE );
}
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