src/mesa/drivers/dri/sis/sis6326_clear.c

   1 /*
   2  * Copyright 2005 Eric Anholt
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  * Authors:
  25  *    Eric Anholt <anholt@FreeBSD.org>
  26  *
  27  */
  28
  29 #include "sis_context.h"
  30 #include "sis_state.h"
  31 #include "sis_lock.h"
  32 #include "sis_reg.h"
  33
  34 #include "swrast/swrast.h"
  35 #include "main/macros.h"
  36
  37 static void sis_clear_front_buffer(GLcontext *ctx, GLenum mask, GLint x,
  38                                    GLint y, GLint width, GLint height);
  39 static void sis_clear_back_buffer(GLcontext *ctx, GLenum mask, GLint x,
  40                                   GLint y, GLint width, GLint height);
  41 static void sis_clear_z_buffer(GLcontext * ctx, GLbitfield mask, GLint x,
  42                                GLint y, GLint width, GLint height );
  43
  44 static void
  45 set_color_pattern( sisContextPtr smesa, GLubyte red, GLubyte green,
  46                    GLubyte blue, GLubyte alpha )
  47 {
  48    /* XXX only RGB565 and ARGB8888 */
  49    switch (smesa->colorFormat)
  50    {
  51    case DST_FORMAT_ARGB_8888:
  52       smesa->clearColorPattern = (alpha << 24) +
  53          (red << 16) + (green << 8) + (blue);
  54       break;
  55    case DST_FORMAT_RGB_565:
  56       smesa->clearColorPattern = ((red >> 3) << 11) +
  57          ((green >> 2) << 5) + (blue >> 3);
  58       smesa->clearColorPattern |= smesa->clearColorPattern << 16;
  59       break;
  60    default:
  61       sis_fatal_error("Bad dst color format\n");
  62    }
  63 }
  64
  65 void
  66 sis6326UpdateZPattern(sisContextPtr smesa, GLclampd z)
  67 {
  68    CLAMPED_FLOAT_TO_USHORT(smesa->clearZStencilPattern, z * 65535.0);
  69 }
  70
  71 void
  72 sis6326DDClear(GLcontext *ctx, GLbitfield mask)
  73 {
  74    sisContextPtr smesa = SIS_CONTEXT(ctx);
  75    GLint x1, y1, width1, height1;
  76
  77    /* get region after locking: */
  78    x1 = ctx->DrawBuffer->_Xmin;
  79    y1 = ctx->DrawBuffer->_Ymin;
  80    width1 = ctx->DrawBuffer->_Xmax - x1;
  81    height1 = ctx->DrawBuffer->_Ymax - y1;
  82    y1 = Y_FLIP(y1 + height1 - 1);
  83
  84    /* XXX: Scissoring */
  85
  86    fprintf(stderr, "Clear\n");
  87
  88    /* Mask out any non-existent buffers */
  89    if (smesa->depth.offset == 0 || !ctx->Depth.Mask)
  90       mask &= ~BUFFER_BIT_DEPTH;
  91
  92    LOCK_HARDWARE();
  93
  94    if (mask & BUFFER_BIT_FRONT_LEFT) {
  95       sis_clear_front_buffer(ctx, mask, x1, y1, width1, height1);
  96       mask &= ~BUFFER_BIT_FRONT_LEFT;
  97    }
  98
  99    if (mask & BUFFER_BIT_BACK_LEFT) {
 100       sis_clear_back_buffer(ctx, mask, x1, y1, width1, height1);
 101       mask &= ~BUFFER_BIT_BACK_LEFT;
 102    }
 103
 104    if (mask & BUFFER_BIT_DEPTH) {
 105       sis_clear_z_buffer(ctx, mask, x1, y1, width1, height1);
 106       mask &= ~BUFFER_BIT_DEPTH;
 107    }
 108
 109    UNLOCK_HARDWARE();
 110
 111    if (mask != 0)
 112       _swrast_Clear(ctx, mask);
 113 }
 114
 115
 116 void
 117 sis6326DDClearColor(GLcontext *ctx, const GLfloat color[4])
 118 {
 119    sisContextPtr smesa = SIS_CONTEXT(ctx);
 120    GLubyte c[4];
 121
 122    CLAMPED_FLOAT_TO_UBYTE(c[0], color[0]);
 123    CLAMPED_FLOAT_TO_UBYTE(c[1], color[1]);
 124    CLAMPED_FLOAT_TO_UBYTE(c[2], color[2]);
 125    CLAMPED_FLOAT_TO_UBYTE(c[3], color[3]);
 126
 127    set_color_pattern( smesa, c[0], c[1], c[2], c[3] );
 128 }
 129
 130 void
 131 sis6326DDClearDepth(GLcontext *ctx, GLclampd d)
 132 {
 133    sisContextPtr smesa = SIS_CONTEXT(ctx);
 134
 135    sis6326UpdateZPattern(smesa, d);
 136 }
 137
 138 static void
 139 sis_clear_back_buffer(GLcontext *ctx, GLenum mask, GLint x, GLint y,
 140                       GLint width, GLint height)
 141 {
 142    sisContextPtr smesa = SIS_CONTEXT(ctx);
 143
 144    /* XXX: The order of writing these registers seems to matter, while
 145     * it actually shouldn't.
 146     */
 147    mWait3DCmdQueue(6);
 148    MMIO(REG_6326_BitBlt_DstSrcPitch, smesa->back.pitch << 16);
 149    MMIO(REG_6326_BitBlt_fgColor, SiS_ROP_PATCOPY |
 150         smesa->clearColorPattern);
 151    MMIO(REG_6326_BitBlt_bgColor, SiS_ROP_PATCOPY |
 152         smesa->clearColorPattern);
 153    MMIO(REG_6326_BitBlt_DstAddr, smesa->back.offset +
 154         (y+height) * smesa->back.pitch +
 155         (x+width) * smesa->bytesPerPixel);
 156    MMIO(REG_6326_BitBlt_HeightWidth, ((height-1) << 16) |
 157         (width * smesa->bytesPerPixel));
 158    MMIO_WMB();
 159    MMIO(REG_6326_BitBlt_Cmd, BLT_PAT_BG);
 160 }
 161
 162 static void
 163 sis_clear_front_buffer(GLcontext *ctx, GLenum mask, GLint x, GLint y,
 164                        GLint width, GLint height)
 165 {
 166    sisContextPtr smesa = SIS_CONTEXT(ctx);
 167    int count;
 168    drm_clip_rect_t *pExtents = NULL;
 169
 170    pExtents = smesa->driDrawable->pClipRects;
 171    count = smesa->driDrawable->numClipRects;
 172
 173    mWait3DCmdQueue(3);
 174    MMIO(REG_6326_BitBlt_DstSrcPitch, smesa->front.pitch << 16);
 175    MMIO(REG_6326_BitBlt_fgColor, SiS_ROP_PATCOPY |
 176        smesa->clearColorPattern);
 177    MMIO(REG_6326_BitBlt_bgColor, SiS_ROP_PATCOPY |
 178        smesa->clearColorPattern);
 179
 180    while (count--) {
 181       GLint x1 = pExtents->x1 - smesa->driDrawable->x;
 182       GLint y1 = pExtents->y1 - smesa->driDrawable->y;
 183       GLint x2 = pExtents->x2 - smesa->driDrawable->x;
 184       GLint y2 = pExtents->y2 - smesa->driDrawable->y;
 185
 186       if (x > x1)
 187          x1 = x;
 188       if (y > y1)
 189          y1 = y;
 190
 191       if (x + width < x2)
 192          x2 = x + width;
 193       if (y + height < y2)
 194          y2 = y + height;
 195       width = x2 - x1;
 196       height = y2 - y1;
 197
 198       pExtents++;
 199
 200       if (width <= 0 || height <= 0)
 201          continue;
 202
 203       mWait3DCmdQueue(3);
 204       MMIO(REG_6326_BitBlt_DstAddr, smesa->front.offset +
 205            (y2-1) * smesa->front.pitch + x2 * smesa->bytesPerPixel);
 206       MMIO(REG_6326_BitBlt_HeightWidth, ((height-1) << 16) |
 207            (width * smesa->bytesPerPixel));
 208       MMIO_WMB();
 209       MMIO(REG_6326_BitBlt_Cmd, BLT_PAT_BG);
 210    }
 211 }
 212
 213 static void
 214 sis_clear_z_buffer(GLcontext * ctx, GLbitfield mask, GLint x, GLint y,
 215                    GLint width, GLint height)
 216 {
 217    sisContextPtr smesa = SIS_CONTEXT(ctx);
 218
 219    mWait3DCmdQueue(6);
 220    MMIO(REG_6326_BitBlt_DstAddr,
 221         smesa->depth.offset + y * smesa->depth.pitch + x * 2);
 222    MMIO(REG_6326_BitBlt_DstSrcPitch, smesa->depth.pitch << 16);
 223    MMIO(REG_6326_BitBlt_HeightWidth, ((height-1) << 16) | (width * 2));
 224    MMIO(REG_6326_BitBlt_fgColor, SiS_ROP_PATCOPY | smesa->clearZStencilPattern);
 225    MMIO(REG_6326_BitBlt_bgColor, SiS_ROP_PATCOPY | smesa->clearZStencilPattern);
 226    MMIO_WMB();
 227    MMIO(REG_6326_BitBlt_Cmd, BLT_PAT_BG | BLT_XINC | BLT_YINC);
 228 }
 229