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/*
* Copyright 2005 Eric Anholt
* 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, sublicense,
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*
* Authors:
* Eric Anholt <anholt@FreeBSD.org>
*
*/
#include "sis_context.h"
#include "sis_state.h"
#include "sis_lock.h"
#include "sis_reg.h"
#include "swrast/swrast.h"
#include "macros.h"
static void sis_clear_front_buffer(GLcontext *ctx, GLenum mask, GLint x,
GLint y, GLint width, GLint height);
static void sis_clear_back_buffer(GLcontext *ctx, GLenum mask, GLint x,
GLint y, GLint width, GLint height);
static void sis_clear_z_buffer(GLcontext * ctx, GLbitfield mask, GLint x,
GLint y, GLint width, GLint height );
static void
set_color_pattern( sisContextPtr smesa, GLubyte red, GLubyte green,
GLubyte blue, GLubyte alpha )
{
/* XXX only RGB565 and ARGB8888 */
switch (smesa->colorFormat)
{
case DST_FORMAT_ARGB_8888:
smesa->clearColorPattern = (alpha << 24) +
(red << 16) + (green << 8) + (blue);
break;
case DST_FORMAT_RGB_565:
smesa->clearColorPattern = ((red >> 3) << 11) +
((green >> 2) << 5) + (blue >> 3);
smesa->clearColorPattern |= smesa->clearColorPattern << 16;
break;
default:
sis_fatal_error("Bad dst color format\n");
}
}
void
sis6326UpdateZPattern(sisContextPtr smesa, GLclampd z)
{
CLAMPED_FLOAT_TO_USHORT(smesa->clearZStencilPattern, z * 65535.0);
}
void
sis6326DDClear(GLcontext *ctx, GLbitfield mask, GLboolean all,
GLint x, GLint y, GLint width, GLint height)
{
sisContextPtr smesa = SIS_CONTEXT(ctx);
GLint x1, y1, width1, height1;
if (all) {
GLframebuffer *buffer = ctx->DrawBuffer;
x1 = 0;
y1 = 0;
width1 = buffer->Width;
height1 = buffer->Height;
} else {
x1 = x;
y1 = Y_FLIP(y+height-1);
width1 = width;
height1 = height;
}
/* XXX: Scissoring */
fprintf(stderr, "Clear\n");
/* Mask out any non-existent buffers */
if (smesa->depth.offset == 0 || !ctx->Depth.Mask)
mask &= ~BUFFER_BIT_DEPTH;
LOCK_HARDWARE();
if (mask & BUFFER_BIT_FRONT_LEFT) {
sis_clear_front_buffer(ctx, mask, x1, y1, width1, height1);
mask &= ~BUFFER_BIT_FRONT_LEFT;
}
if (mask & BUFFER_BIT_BACK_LEFT) {
sis_clear_back_buffer(ctx, mask, x1, y1, width1, height1);
mask &= ~BUFFER_BIT_BACK_LEFT;
}
if (mask & BUFFER_BIT_DEPTH) {
sis_clear_z_buffer(ctx, mask, x1, y1, width1, height1);
mask &= ~BUFFER_BIT_DEPTH;
}
UNLOCK_HARDWARE();
if (mask != 0)
_swrast_Clear(ctx, mask, all, x1, y1, width, height);
}
void
sis6326DDClearColor(GLcontext *ctx, const GLfloat color[4])
{
sisContextPtr smesa = SIS_CONTEXT(ctx);
GLubyte c[4];
CLAMPED_FLOAT_TO_UBYTE(c[0], color[0]);
CLAMPED_FLOAT_TO_UBYTE(c[1], color[1]);
CLAMPED_FLOAT_TO_UBYTE(c[2], color[2]);
CLAMPED_FLOAT_TO_UBYTE(c[3], color[3]);
set_color_pattern( smesa, c[0], c[1], c[2], c[3] );
}
void
sis6326DDClearDepth(GLcontext *ctx, GLclampd d)
{
sisContextPtr smesa = SIS_CONTEXT(ctx);
sis6326UpdateZPattern(smesa, d);
}
static void
sis_clear_back_buffer(GLcontext *ctx, GLenum mask, GLint x, GLint y,
GLint width, GLint height)
{
sisContextPtr smesa = SIS_CONTEXT(ctx);
/* XXX: The order of writing these registers seems to matter, while
* it actually shouldn't.
*/
mWait3DCmdQueue(6);
MMIO(REG_6326_BitBlt_DstSrcPitch, smesa->back.pitch << 16);
MMIO(REG_6326_BitBlt_fgColor, SiS_ROP_PATCOPY |
smesa->clearColorPattern);
MMIO(REG_6326_BitBlt_bgColor, SiS_ROP_PATCOPY |
smesa->clearColorPattern);
MMIO(REG_6326_BitBlt_DstAddr, smesa->back.offset +
(y+height) * smesa->back.pitch +
(x+width) * smesa->bytesPerPixel);
MMIO(REG_6326_BitBlt_HeightWidth, ((height-1) << 16) |
(width * smesa->bytesPerPixel));
MMIO_WMB();
MMIO(REG_6326_BitBlt_Cmd, BLT_PAT_BG);
}
static void
sis_clear_front_buffer(GLcontext *ctx, GLenum mask, GLint x, GLint y,
GLint width, GLint height)
{
sisContextPtr smesa = SIS_CONTEXT(ctx);
int count;
drm_clip_rect_t *pExtents = NULL;
pExtents = smesa->driDrawable->pClipRects;
count = smesa->driDrawable->numClipRects;
mWait3DCmdQueue(3);
MMIO(REG_6326_BitBlt_DstSrcPitch, smesa->front.pitch << 16);
MMIO(REG_6326_BitBlt_fgColor, SiS_ROP_PATCOPY |
smesa->clearColorPattern);
MMIO(REG_6326_BitBlt_bgColor, SiS_ROP_PATCOPY |
smesa->clearColorPattern);
while (count--) {
GLint x1 = pExtents->x1 - smesa->driDrawable->x;
GLint y1 = pExtents->y1 - smesa->driDrawable->y;
GLint x2 = pExtents->x2 - smesa->driDrawable->x;
GLint y2 = pExtents->y2 - smesa->driDrawable->y;
if (x > x1)
x1 = x;
if (y > y1)
y1 = y;
if (x + width < x2)
x2 = x + width;
if (y + height < y2)
y2 = y + height;
width = x2 - x1;
height = y2 - y1;
pExtents++;
if (width <= 0 || height <= 0)
continue;
mWait3DCmdQueue(3);
MMIO(REG_6326_BitBlt_DstAddr, smesa->front.offset +
(y2-1) * smesa->front.pitch + x2 * smesa->bytesPerPixel);
MMIO(REG_6326_BitBlt_HeightWidth, ((height-1) << 16) |
(width * smesa->bytesPerPixel));
MMIO_WMB();
MMIO(REG_6326_BitBlt_Cmd, BLT_PAT_BG);
}
}
static void
sis_clear_z_buffer(GLcontext * ctx, GLbitfield mask, GLint x, GLint y,
GLint width, GLint height)
{
sisContextPtr smesa = SIS_CONTEXT(ctx);
mWait3DCmdQueue(6);
MMIO(REG_6326_BitBlt_DstAddr,
smesa->depth.offset + y * smesa->depth.pitch + x * 2);
MMIO(REG_6326_BitBlt_DstSrcPitch, smesa->depth.pitch << 16);
MMIO(REG_6326_BitBlt_HeightWidth, ((height-1) << 16) | (width * 2));
MMIO(REG_6326_BitBlt_fgColor, SiS_ROP_PATCOPY | smesa->clearZStencilPattern);
MMIO(REG_6326_BitBlt_bgColor, SiS_ROP_PATCOPY | smesa->clearZStencilPattern);
MMIO_WMB();
MMIO(REG_6326_BitBlt_Cmd, BLT_PAT_BG | BLT_XINC | BLT_YINC);
}
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