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 "util/u_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       cso_set_vertex_elements(st->cso_context, 2, st->velems);
  90
  91       util_draw_vertex_buffer(pipe, buf, 0,
  92                               PIPE_PRIM_TRIANGLE_FAN,
  93                               4,  /* verts */
  94                               2); /* attribs/vert */
  95
  96       pipe_buffer_reference(&buf, NULL);
  97    }
  98 }
  99
 100 /**
 101  * Do vgClear by drawing a quadrilateral.
 102  */
 103 static void
 104 clear_with_quad(struct vg_context *st, float x0, float y0,
 105                 float width, float height, const VGfloat clear_color[4])
 106 {
 107    VGfloat x1, y1;
 108
 109    vg_validate_state(st);
 110
 111    x1 = x0 + width;
 112    y1 = y0 + height;
 113
 114    /*
 115      printf("%s %f,%f %f,%f\n", __FUNCTION__,
 116      x0, y0,
 117      x1, y1);
 118    */
 119
 120    cso_save_blend(st->cso_context);
 121    cso_save_rasterizer(st->cso_context);
 122    cso_save_fragment_shader(st->cso_context);
 123    cso_save_vertex_shader(st->cso_context);
 124
 125    /* blend state: RGBA masking */
 126    {
 127       struct pipe_blend_state blend;
 128       memset(&blend, 0, sizeof(blend));
 129       blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
 130       blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 131       blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
 132       blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
 133       blend.rt[0].colormask = PIPE_MASK_RGBA;
 134       cso_set_blend(st->cso_context, &blend);
 135    }
 136
 137    cso_set_rasterizer(st->cso_context, &st->clear.raster);
 138
 139    cso_set_fragment_shader_handle(st->cso_context, st->clear.fs);
 140    cso_set_vertex_shader_handle(st->cso_context, vg_clear_vs(st));
 141
 142    /* draw quad matching scissor rect (XXX verify coord round-off) */
 143    draw_clear_quad(st, x0, y0, x1, y1, 0, clear_color);
 144
 145    /* Restore pipe state */
 146    cso_restore_blend(st->cso_context);
 147    cso_restore_rasterizer(st->cso_context);
 148    cso_restore_fragment_shader(st->cso_context);
 149    cso_restore_vertex_shader(st->cso_context);
 150 }
 151
 152
 153 void vgMask(VGHandle mask, VGMaskOperation operation,
 154             VGint x, VGint y,
 155             VGint width, VGint height)
 156 {
 157    struct vg_context *ctx = vg_current_context();
 158
 159    if (width <=0 || height <= 0) {
 160       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 161       return;
 162    }
 163
 164    if (operation < VG_CLEAR_MASK || operation > VG_SUBTRACT_MASK) {
 165       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 166       return;
 167    }
 168
 169
 170    vg_validate_state(ctx);
 171
 172    if (operation == VG_CLEAR_MASK) {
 173       mask_fill(x, y, width, height, 0.f);
 174    } else if (operation == VG_FILL_MASK) {
 175       mask_fill(x, y, width, height, 1.f);
 176    } else if (vg_object_is_valid((void*)mask, VG_OBJECT_IMAGE)) {
 177       struct vg_image *image = (struct vg_image *)mask;
 178       mask_using_image(image, operation, x, y, width, height);
 179    } else if (vg_object_is_valid((void*)mask, VG_OBJECT_MASK)) {
 180 #if DISABLE_1_1_MASKING
 181       return;
 182 #else
 183       struct vg_mask_layer *layer = (struct vg_mask_layer *)mask;
 184       mask_using_layer(layer, operation, x, y, width, height);
 185 #endif
 186    } else {
 187       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 188    }
 189 }
 190
 191 void vgClear(VGint x, VGint y,
 192              VGint width, VGint height)
 193 {
 194    struct vg_context *ctx = vg_current_context();
 195    struct pipe_framebuffer_state *fb;
 196
 197    if (width <= 0 || height <= 0) {
 198       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 199       return;
 200    }
 201
 202    vg_validate_state(ctx);
 203 #if 0
 204    debug_printf("Clear [%d, %d, %d, %d] with [%f, %f, %f, %f]\n",
 205                 x, y, width, height,
 206                 ctx->state.vg.clear_color[0],
 207                 ctx->state.vg.clear_color[1],
 208                 ctx->state.vg.clear_color[2],
 209                 ctx->state.vg.clear_color[3]);
 210 #endif
 211
 212    fb = &ctx->state.g3d.fb;
 213    /* check for a whole surface clear */
 214    if (!ctx->state.vg.scissoring &&
 215        (x == 0 && y == 0 && width == fb->width && height == fb->height)) {
 216       ctx->pipe->clear(ctx->pipe, PIPE_CLEAR_COLOR | PIPE_CLEAR_DEPTHSTENCIL,
 217                        ctx->state.vg.clear_color, 1., 0);
 218    } else {
 219       clear_with_quad(ctx, x, y, width, height, ctx->state.vg.clear_color);
 220    }
 221 }
 222
 223
 224 #ifdef OPENVG_VERSION_1_1
 225
 226
 227 void vgRenderToMask(VGPath path,
 228                     VGbitfield paintModes,
 229                     VGMaskOperation operation)
 230 {
 231    struct vg_context *ctx = vg_current_context();
 232
 233    if (path == VG_INVALID_HANDLE) {
 234       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 235       return;
 236    }
 237    if (!paintModes || (paintModes&(~(VG_STROKE_PATH|VG_FILL_PATH)))) {
 238       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 239       return;
 240    }
 241    if (operation < VG_CLEAR_MASK ||
 242        operation > VG_SUBTRACT_MASK) {
 243       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 244       return;
 245    }
 246    if (!vg_object_is_valid((void*)path, VG_OBJECT_PATH)) {
 247       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 248       return;
 249    }
 250
 251 #if DISABLE_1_1_MASKING
 252    return;
 253 #endif
 254
 255    vg_validate_state(ctx);
 256
 257    mask_render_to((struct path *)path, paintModes, operation);
 258 }
 259
 260 VGMaskLayer vgCreateMaskLayer(VGint width, VGint height)
 261 {
 262    struct vg_context *ctx = vg_current_context();
 263
 264    if (width <= 0 || height <= 0 ||
 265        width > vgGeti(VG_MAX_IMAGE_WIDTH) ||
 266        height > vgGeti(VG_MAX_IMAGE_HEIGHT)) {
 267       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 268       return VG_INVALID_HANDLE;
 269    }
 270
 271    return (VGMaskLayer)mask_layer_create(width, height);
 272 }
 273
 274 void vgDestroyMaskLayer(VGMaskLayer maskLayer)
 275 {
 276    struct vg_mask_layer *mask = 0;
 277    struct vg_context *ctx = vg_current_context();
 278
 279    if (maskLayer == VG_INVALID_HANDLE) {
 280       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 281       return;
 282    }
 283    if (!vg_object_is_valid((void*)maskLayer, VG_OBJECT_MASK)) {
 284       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 285       return;
 286    }
 287
 288    mask = (struct vg_mask_layer *)maskLayer;
 289    mask_layer_destroy(mask);
 290 }
 291
 292 void vgFillMaskLayer(VGMaskLayer maskLayer,
 293                      VGint x, VGint y,
 294                      VGint width, VGint height,
 295                      VGfloat value)
 296 {
 297    struct vg_mask_layer *mask = 0;
 298    struct vg_context *ctx = vg_current_context();
 299
 300    if (maskLayer == VG_INVALID_HANDLE) {
 301       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 302       return;
 303    }
 304
 305    if (value < 0 || value > 1) {
 306       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 307       return;
 308    }
 309
 310    if (width <= 0 || height <= 0) {
 311       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 312       return;
 313    }
 314    if (x < 0 || y < 0 || (x + width) < 0 || (y + height) < 0) {
 315       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 316       return;
 317    }
 318
 319    if (!vg_object_is_valid((void*)maskLayer, VG_OBJECT_MASK)) {
 320       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 321       return;
 322    }
 323
 324    mask = (struct vg_mask_layer*)maskLayer;
 325
 326    if (x + width > mask_layer_width(mask) ||
 327        y + height > mask_layer_height(mask)) {
 328       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 329       return;
 330    }
 331
 332 #if DISABLE_1_1_MASKING
 333    return;
 334 #endif
 335    mask_layer_fill(mask, x, y, width, height, value);
 336 }
 337
 338 void vgCopyMask(VGMaskLayer maskLayer,
 339                 VGint sx, VGint sy,
 340                 VGint dx, VGint dy,
 341                 VGint width, VGint height)
 342 {
 343    struct vg_context *ctx = vg_current_context();
 344    struct vg_mask_layer *mask = 0;
 345
 346    if (maskLayer == VG_INVALID_HANDLE) {
 347       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 348       return;
 349    }
 350    if (width <= 0 || height <= 0) {
 351       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 352       return;
 353    }
 354    if (!vg_object_is_valid((void*)maskLayer, VG_OBJECT_MASK)) {
 355       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 356       return;
 357    }
 358
 359 #if DISABLE_1_1_MASKING
 360    return;
 361 #endif
 362
 363    mask = (struct vg_mask_layer*)maskLayer;
 364    mask_copy(mask, sx, sy, dx, dy, width, height);
 365 }
 366
 367 #endif