src/gallium/state_trackers/vega/api_masks.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.  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
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sub license, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial portions
  15  * of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  20  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  21  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  **************************************************************************/
  26
  27 #include "VG/openvg.h"
  28
  29 #include "mask.h"
  30 #include "renderer.h"
  31
  32 #include "vg_context.h"
  33 #include "pipe/p_context.h"
  34 #include "pipe/p_inlines.h"
  35
  36 #include "util/u_pack_color.h"
  37 #include "util/u_draw_quad.h"
  38 #include "util/u_memory.h"
  39
  40
  41 #define DISABLE_1_1_MASKING 1
  42
  43 /**
  44  * Draw a screen-aligned quadrilateral.
  45  * Coords are window coords with y=0=bottom.  These coords will be transformed
  46  * by the vertex shader and viewport transform.
  47  */
  48 static void
  49 draw_clear_quad(struct vg_context *st,
  50                 float x0, float y0, float x1, float y1, float z,
  51                 const VGfloat color[4])
  52 {
  53    struct pipe_context *pipe = st->pipe;
  54    struct pipe_buffer *buf;
  55    VGuint i;
  56
  57    /* positions */
  58    st->clear.vertices[0][0][0] = x0;
  59    st->clear.vertices[0][0][1] = y0;
  60
  61    st->clear.vertices[1][0][0] = x1;
  62    st->clear.vertices[1][0][1] = y0;
  63
  64    st->clear.vertices[2][0][0] = x1;
  65    st->clear.vertices[2][0][1] = y1;
  66
  67    st->clear.vertices[3][0][0] = x0;
  68    st->clear.vertices[3][0][1] = y1;
  69
  70    /* same for all verts: */
  71    for (i = 0; i < 4; i++) {
  72       st->clear.vertices[i][0][2] = z;
  73       st->clear.vertices[i][0][3] = 1.0;
  74       st->clear.vertices[i][1][0] = color[0];
  75       st->clear.vertices[i][1][1] = color[1];
  76       st->clear.vertices[i][1][2] = color[2];
  77       st->clear.vertices[i][1][3] = color[3];
  78    }
  79
  80
  81    /* put vertex data into vbuf */
  82    buf =  pipe_user_buffer_create(pipe->screen,
  83                                   st->clear.vertices,
  84                                   sizeof(st->clear.vertices));
  85
  86
  87    /* draw */
  88    if (buf) {
  89       util_draw_vertex_buffer(pipe, buf, 0,
  90                               PIPE_PRIM_TRIANGLE_FAN,
  91                               4,  /* verts */
  92                               2); /* attribs/vert */
  93
  94       pipe_buffer_reference(&buf, NULL);
  95    }
  96 }
  97
  98 /**
  99  * Do vgClear by drawing a quadrilateral.
 100  */
 101 static void
 102 clear_with_quad(struct vg_context *st, float x0, float y0,
 103                 float width, float height, const VGfloat clear_color[4])
 104 {
 105    VGfloat x1, y1;
 106
 107    vg_validate_state(st);
 108
 109    x1 = x0 + width;
 110    y1 = y0 + height;
 111
 112    /*
 113      printf("%s %f,%f %f,%f\n", __FUNCTION__,
 114      x0, y0,
 115      x1, y1);
 116    */
 117
 118    if (st->pipe->screen && st->pipe->screen->update_buffer)
 119       st->pipe->screen->update_buffer( st->pipe->screen,
 120                                        st->pipe->priv );
 121
 122    cso_save_blend(st->cso_context);
 123    cso_save_rasterizer(st->cso_context);
 124    cso_save_fragment_shader(st->cso_context);
 125    cso_save_vertex_shader(st->cso_context);
 126
 127    /* blend state: RGBA masking */
 128    {
 129       struct pipe_blend_state blend;
 130       memset(&blend, 0, sizeof(blend));
 131       blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE;
 132       blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 133       blend.rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
 134       blend.alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
 135       blend.colormask |= PIPE_MASK_R;
 136       blend.colormask |= PIPE_MASK_G;
 137       blend.colormask |= PIPE_MASK_B;
 138       blend.colormask |= PIPE_MASK_A;
 139       cso_set_blend(st->cso_context, &blend);
 140    }
 141
 142    cso_set_rasterizer(st->cso_context, &st->clear.raster);
 143
 144    cso_set_fragment_shader_handle(st->cso_context, st->clear.fs);
 145    cso_set_vertex_shader_handle(st->cso_context, vg_clear_vs(st));
 146
 147    /* draw quad matching scissor rect (XXX verify coord round-off) */
 148    draw_clear_quad(st, x0, y0, x1, y1, 0, clear_color);
 149
 150    /* Restore pipe state */
 151    cso_restore_blend(st->cso_context);
 152    cso_restore_rasterizer(st->cso_context);
 153    cso_restore_fragment_shader(st->cso_context);
 154    cso_restore_vertex_shader(st->cso_context);
 155 }
 156
 157
 158 void vgMask(VGHandle mask, VGMaskOperation operation,
 159             VGint x, VGint y,
 160             VGint width, VGint height)
 161 {
 162    struct vg_context *ctx = vg_current_context();
 163
 164    if (width <=0 || height <= 0) {
 165       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 166       return;
 167    }
 168
 169    if (operation < VG_CLEAR_MASK || operation > VG_SUBTRACT_MASK) {
 170       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 171       return;
 172    }
 173
 174
 175    vg_validate_state(ctx);
 176
 177    if (operation == VG_CLEAR_MASK) {
 178       mask_fill(x, y, width, height, 0.f);
 179    } else if (operation == VG_FILL_MASK) {
 180       mask_fill(x, y, width, height, 1.f);
 181    } else if (vg_object_is_valid((void*)mask, VG_OBJECT_IMAGE)) {
 182       struct vg_image *image = (struct vg_image *)mask;
 183       mask_using_image(image, operation, x, y, width, height);
 184    } else if (vg_object_is_valid((void*)mask, VG_OBJECT_MASK)) {
 185 #if DISABLE_1_1_MASKING
 186       return;
 187 #else
 188       struct vg_mask_layer *layer = (struct vg_mask_layer *)mask;
 189       mask_using_layer(layer, operation, x, y, width, height);
 190 #endif
 191    } else {
 192       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 193    }
 194 }
 195
 196 void vgClear(VGint x, VGint y,
 197              VGint width, VGint height)
 198 {
 199    struct vg_context *ctx = vg_current_context();
 200    struct pipe_framebuffer_state *fb;
 201
 202    if (width <= 0 || height <= 0) {
 203       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 204       return;
 205    }
 206
 207    vg_validate_state(ctx);
 208 #if 0
 209    debug_printf("Clear [%d, %d, %d, %d] with [%f, %f, %f, %f]\n",
 210                 x, y, width, height,
 211                 ctx->state.vg.clear_color[0],
 212                 ctx->state.vg.clear_color[1],
 213                 ctx->state.vg.clear_color[2],
 214                 ctx->state.vg.clear_color[3]);
 215 #endif
 216
 217    fb = &ctx->state.g3d.fb;
 218    /* check for a whole surface clear */
 219    if (!ctx->state.vg.scissoring &&
 220        (x == 0 && y == 0 && width == fb->width && height == fb->height)) {
 221       ctx->pipe->clear(ctx->pipe, PIPE_CLEAR_COLOR | PIPE_CLEAR_DEPTHSTENCIL,
 222                        ctx->state.vg.clear_color, 1., 0);
 223    } else {
 224       clear_with_quad(ctx, x, y, width, height, ctx->state.vg.clear_color);
 225    }
 226 }
 227
 228
 229 #ifdef OPENVG_VERSION_1_1
 230
 231
 232 void vgRenderToMask(VGPath path,
 233                     VGbitfield paintModes,
 234                     VGMaskOperation operation)
 235 {
 236    struct vg_context *ctx = vg_current_context();
 237
 238    if (path == VG_INVALID_HANDLE) {
 239       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 240       return;
 241    }
 242    if (!paintModes || (paintModes&(~(VG_STROKE_PATH|VG_FILL_PATH)))) {
 243       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 244       return;
 245    }
 246    if (operation < VG_CLEAR_MASK ||
 247        operation > VG_SUBTRACT_MASK) {
 248       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 249       return;
 250    }
 251    if (!vg_object_is_valid((void*)path, VG_OBJECT_PATH)) {
 252       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 253       return;
 254    }
 255
 256 #if DISABLE_1_1_MASKING
 257    return;
 258 #endif
 259
 260    vg_validate_state(ctx);
 261
 262    mask_render_to((struct path *)path, paintModes, operation);
 263 }
 264
 265 VGMaskLayer vgCreateMaskLayer(VGint width, VGint height)
 266 {
 267    struct vg_context *ctx = vg_current_context();
 268
 269    if (width <= 0 || height <= 0 ||
 270        width > vgGeti(VG_MAX_IMAGE_WIDTH) ||
 271        height > vgGeti(VG_MAX_IMAGE_HEIGHT)) {
 272       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 273       return VG_INVALID_HANDLE;
 274    }
 275
 276    return (VGMaskLayer)mask_layer_create(width, height);
 277 }
 278
 279 void vgDestroyMaskLayer(VGMaskLayer maskLayer)
 280 {
 281    struct vg_mask_layer *mask = 0;
 282    struct vg_context *ctx = vg_current_context();
 283
 284    if (maskLayer == VG_INVALID_HANDLE) {
 285       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 286       return;
 287    }
 288    if (!vg_object_is_valid((void*)maskLayer, VG_OBJECT_MASK)) {
 289       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 290       return;
 291    }
 292
 293    mask = (struct vg_mask_layer *)maskLayer;
 294    mask_layer_destroy(mask);
 295 }
 296
 297 void vgFillMaskLayer(VGMaskLayer maskLayer,
 298                      VGint x, VGint y,
 299                      VGint width, VGint height,
 300                      VGfloat value)
 301 {
 302    struct vg_mask_layer *mask = 0;
 303    struct vg_context *ctx = vg_current_context();
 304
 305    if (maskLayer == VG_INVALID_HANDLE) {
 306       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 307       return;
 308    }
 309
 310    if (value < 0 || value > 1) {
 311       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 312       return;
 313    }
 314
 315    if (width <= 0 || height <= 0) {
 316       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 317       return;
 318    }
 319    if (x < 0 || y < 0 || (x + width) < 0 || (y + height) < 0) {
 320       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 321       return;
 322    }
 323
 324    if (!vg_object_is_valid((void*)maskLayer, VG_OBJECT_MASK)) {
 325       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 326       return;
 327    }
 328
 329    mask = (struct vg_mask_layer*)maskLayer;
 330
 331    if (x + width > mask_layer_width(mask) ||
 332        y + height > mask_layer_height(mask)) {
 333       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 334       return;
 335    }
 336
 337 #if DISABLE_1_1_MASKING
 338    return;
 339 #endif
 340    mask_layer_fill(mask, x, y, width, height, value);
 341 }
 342
 343 void vgCopyMask(VGMaskLayer maskLayer,
 344                 VGint sx, VGint sy,
 345                 VGint dx, VGint dy,
 346                 VGint width, VGint height)
 347 {
 348    struct vg_context *ctx = vg_current_context();
 349    struct vg_mask_layer *mask = 0;
 350
 351    if (maskLayer == VG_INVALID_HANDLE) {
 352       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 353       return;
 354    }
 355    if (width <= 0 || height <= 0) {
 356       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 357       return;
 358    }
 359    if (!vg_object_is_valid((void*)maskLayer, VG_OBJECT_MASK)) {
 360       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 361       return;
 362    }
 363
 364 #if DISABLE_1_1_MASKING
 365    return;
 366 #endif
 367
 368    mask = (struct vg_mask_layer*)maskLayer;
 369    mask_copy(mask, sx, sy, dx, dy, width, height);
 370 }
 371
 372 #endif