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_resource *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                                   PIPE_BIND_VERTEX_BUFFER);
  86
  87
  88    /* draw */
  89    if (buf) {
  90       cso_set_vertex_elements(st->cso_context, 2, st->velems);
  91
  92       util_draw_vertex_buffer(pipe, buf, 0,
  93                               PIPE_PRIM_TRIANGLE_FAN,
  94                               4,  /* verts */
  95                               2); /* attribs/vert */
  96
  97       pipe_resource_reference(&buf, NULL);
  98    }
  99 }
 100
 101 /**
 102  * Do vgClear by drawing a quadrilateral.
 103  */
 104 static void
 105 clear_with_quad(struct vg_context *st, float x0, float y0,
 106                 float width, float height, const VGfloat clear_color[4])
 107 {
 108    VGfloat x1, y1;
 109
 110    vg_validate_state(st);
 111
 112    x1 = x0 + width;
 113    y1 = y0 + height;
 114
 115    /*
 116      printf("%s %f,%f %f,%f\n", __FUNCTION__,
 117      x0, y0,
 118      x1, y1);
 119    */
 120
 121    cso_save_blend(st->cso_context);
 122    cso_save_rasterizer(st->cso_context);
 123    cso_save_fragment_shader(st->cso_context);
 124    cso_save_vertex_shader(st->cso_context);
 125
 126    /* blend state: RGBA masking */
 127    {
 128       struct pipe_blend_state blend;
 129       memset(&blend, 0, sizeof(blend));
 130       blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
 131       blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 132       blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
 133       blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
 134       blend.rt[0].colormask = PIPE_MASK_RGBA;
 135       cso_set_blend(st->cso_context, &blend);
 136    }
 137
 138    cso_set_rasterizer(st->cso_context, &st->clear.raster);
 139
 140    cso_set_fragment_shader_handle(st->cso_context, st->clear.fs);
 141    cso_set_vertex_shader_handle(st->cso_context, vg_clear_vs(st));
 142
 143    /* draw quad matching scissor rect (XXX verify coord round-off) */
 144    draw_clear_quad(st, x0, y0, x1, y1, 0, clear_color);
 145
 146    /* Restore pipe state */
 147    cso_restore_blend(st->cso_context);
 148    cso_restore_rasterizer(st->cso_context);
 149    cso_restore_fragment_shader(st->cso_context);
 150    cso_restore_vertex_shader(st->cso_context);
 151 }
 152
 153
 154 void vgMask(VGHandle mask, VGMaskOperation operation,
 155             VGint x, VGint y,
 156             VGint width, VGint height)
 157 {
 158    struct vg_context *ctx = vg_current_context();
 159
 160    if (width <=0 || height <= 0) {
 161       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 162       return;
 163    }
 164
 165    if (operation < VG_CLEAR_MASK || operation > VG_SUBTRACT_MASK) {
 166       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 167       return;
 168    }
 169
 170
 171    vg_validate_state(ctx);
 172
 173    if (operation == VG_CLEAR_MASK) {
 174       mask_fill(x, y, width, height, 0.f);
 175    } else if (operation == VG_FILL_MASK) {
 176       mask_fill(x, y, width, height, 1.f);
 177    } else if (vg_object_is_valid((void*)mask, VG_OBJECT_IMAGE)) {
 178       struct vg_image *image = (struct vg_image *)mask;
 179       mask_using_image(image, operation, x, y, width, height);
 180    } else if (vg_object_is_valid((void*)mask, VG_OBJECT_MASK)) {
 181 #if DISABLE_1_1_MASKING
 182       return;
 183 #else
 184       struct vg_mask_layer *layer = (struct vg_mask_layer *)mask;
 185       mask_using_layer(layer, operation, x, y, width, height);
 186 #endif
 187    } else {
 188       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 189    }
 190 }
 191
 192 void vgClear(VGint x, VGint y,
 193              VGint width, VGint height)
 194 {
 195    struct vg_context *ctx = vg_current_context();
 196    struct pipe_framebuffer_state *fb;
 197
 198    if (width <= 0 || height <= 0) {
 199       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 200       return;
 201    }
 202
 203    vg_validate_state(ctx);
 204 #if 0
 205    debug_printf("Clear [%d, %d, %d, %d] with [%f, %f, %f, %f]\n",
 206                 x, y, width, height,
 207                 ctx->state.vg.clear_color[0],
 208                 ctx->state.vg.clear_color[1],
 209                 ctx->state.vg.clear_color[2],
 210                 ctx->state.vg.clear_color[3]);
 211 #endif
 212
 213    fb = &ctx->state.g3d.fb;
 214    /* check for a whole surface clear */
 215    if (!ctx->state.vg.scissoring &&
 216        (x == 0 && y == 0 && width == fb->width && height == fb->height)) {
 217       ctx->pipe->clear(ctx->pipe, PIPE_CLEAR_COLOR | PIPE_CLEAR_DEPTHSTENCIL,
 218                        ctx->state.vg.clear_color, 1., 0);
 219    } else {
 220       clear_with_quad(ctx, x, y, width, height, ctx->state.vg.clear_color);
 221    }
 222 }
 223
 224
 225 #ifdef OPENVG_VERSION_1_1
 226
 227
 228 void vgRenderToMask(VGPath path,
 229                     VGbitfield paintModes,
 230                     VGMaskOperation operation)
 231 {
 232    struct vg_context *ctx = vg_current_context();
 233
 234    if (path == VG_INVALID_HANDLE) {
 235       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 236       return;
 237    }
 238    if (!paintModes || (paintModes&(~(VG_STROKE_PATH|VG_FILL_PATH)))) {
 239       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 240       return;
 241    }
 242    if (operation < VG_CLEAR_MASK ||
 243        operation > VG_SUBTRACT_MASK) {
 244       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 245       return;
 246    }
 247    if (!vg_object_is_valid((void*)path, VG_OBJECT_PATH)) {
 248       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 249       return;
 250    }
 251
 252 #if DISABLE_1_1_MASKING
 253    return;
 254 #endif
 255
 256    vg_validate_state(ctx);
 257
 258    mask_render_to((struct path *)path, paintModes, operation);
 259 }
 260
 261 VGMaskLayer vgCreateMaskLayer(VGint width, VGint height)
 262 {
 263    struct vg_context *ctx = vg_current_context();
 264
 265    if (width <= 0 || height <= 0 ||
 266        width > vgGeti(VG_MAX_IMAGE_WIDTH) ||
 267        height > vgGeti(VG_MAX_IMAGE_HEIGHT)) {
 268       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 269       return VG_INVALID_HANDLE;
 270    }
 271
 272    return (VGMaskLayer)mask_layer_create(width, height);
 273 }
 274
 275 void vgDestroyMaskLayer(VGMaskLayer maskLayer)
 276 {
 277    struct vg_mask_layer *mask = 0;
 278    struct vg_context *ctx = vg_current_context();
 279
 280    if (maskLayer == VG_INVALID_HANDLE) {
 281       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 282       return;
 283    }
 284    if (!vg_object_is_valid((void*)maskLayer, VG_OBJECT_MASK)) {
 285       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 286       return;
 287    }
 288
 289    mask = (struct vg_mask_layer *)maskLayer;
 290    mask_layer_destroy(mask);
 291 }
 292
 293 void vgFillMaskLayer(VGMaskLayer maskLayer,
 294                      VGint x, VGint y,
 295                      VGint width, VGint height,
 296                      VGfloat value)
 297 {
 298    struct vg_mask_layer *mask = 0;
 299    struct vg_context *ctx = vg_current_context();
 300
 301    if (maskLayer == VG_INVALID_HANDLE) {
 302       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 303       return;
 304    }
 305
 306    if (value < 0 || value > 1) {
 307       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 308       return;
 309    }
 310
 311    if (width <= 0 || height <= 0) {
 312       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 313       return;
 314    }
 315    if (x < 0 || y < 0 || (x + width) < 0 || (y + height) < 0) {
 316       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 317       return;
 318    }
 319
 320    if (!vg_object_is_valid((void*)maskLayer, VG_OBJECT_MASK)) {
 321       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 322       return;
 323    }
 324
 325    mask = (struct vg_mask_layer*)maskLayer;
 326
 327    if (x + width > mask_layer_width(mask) ||
 328        y + height > mask_layer_height(mask)) {
 329       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 330       return;
 331    }
 332
 333 #if DISABLE_1_1_MASKING
 334    return;
 335 #endif
 336    mask_layer_fill(mask, x, y, width, height, value);
 337 }
 338
 339 void vgCopyMask(VGMaskLayer maskLayer,
 340                 VGint sx, VGint sy,
 341                 VGint dx, VGint dy,
 342                 VGint width, VGint height)
 343 {
 344    struct vg_context *ctx = vg_current_context();
 345    struct vg_mask_layer *mask = 0;
 346
 347    if (maskLayer == VG_INVALID_HANDLE) {
 348       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 349       return;
 350    }
 351    if (width <= 0 || height <= 0) {
 352       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 353       return;
 354    }
 355    if (!vg_object_is_valid((void*)maskLayer, VG_OBJECT_MASK)) {
 356       vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
 357       return;
 358    }
 359
 360 #if DISABLE_1_1_MASKING
 361    return;
 362 #endif
 363
 364    mask = (struct vg_mask_layer*)maskLayer;
 365    mask_copy(mask, sx, sy, dx, dy, width, height);
 366 }
 367
 368 #endif