src/gallium/state_trackers/vega/api_transform.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 "vg_context.h"
  30
  31 #include "matrix.h"
  32 #include "api.h"
  33
  34 void vegaLoadIdentity(void)
  35 {
  36    struct vg_context *ctx = vg_current_context();
  37    struct  matrix *mat = vg_state_matrix(&ctx->state.vg);
  38    matrix_load_identity(mat);
  39 }
  40
  41 void vegaLoadMatrix(const VGfloat * m)
  42 {
  43    struct vg_context *ctx = vg_current_context();
  44    struct  matrix *mat;
  45
  46    if (!ctx)
  47       return;
  48
  49    if (!m || !is_aligned(m)) {
  50       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
  51       return;
  52    }
  53
  54    mat = vg_state_matrix(&ctx->state.vg);
  55    matrix_init(mat, m);
  56    if (!matrix_is_affine(mat)) {
  57       if (ctx->state.vg.matrix_mode != VG_MATRIX_IMAGE_USER_TO_SURFACE) {
  58          matrix_make_affine(mat);
  59       }
  60    }
  61 }
  62
  63 void vegaGetMatrix(VGfloat * m)
  64 {
  65    struct vg_context *ctx = vg_current_context();
  66    struct matrix *mat;
  67
  68    if (!ctx)
  69       return;
  70
  71    if (!m || !is_aligned(m)) {
  72       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
  73       return;
  74    }
  75
  76    mat = vg_state_matrix(&ctx->state.vg);
  77    memcpy(m, mat->m, sizeof(VGfloat)*9);
  78 }
  79
  80 void vegaMultMatrix(const VGfloat * m)
  81 {
  82    struct vg_context *ctx = vg_current_context();
  83    struct matrix *dst, src;
  84
  85    if (!ctx)
  86       return;
  87
  88    if (!m || !is_aligned(m)) {
  89       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
  90       return;
  91    }
  92    matrix_init(&src, m);
  93    dst = vg_state_matrix(&ctx->state.vg);
  94    if (!matrix_is_affine(&src)) {
  95       if (ctx->state.vg.matrix_mode != VG_MATRIX_IMAGE_USER_TO_SURFACE) {
  96          matrix_make_affine(&src);
  97       }
  98    }
  99    matrix_mult(dst, &src);
 100
 101 }
 102
 103 void vegaTranslate(VGfloat tx, VGfloat ty)
 104 {
 105    struct vg_context *ctx = vg_current_context();
 106    struct matrix *dst = vg_state_matrix(&ctx->state.vg);
 107    matrix_translate(dst, tx, ty);
 108 }
 109
 110 void vegaScale(VGfloat sx, VGfloat sy)
 111 {
 112    struct vg_context *ctx = vg_current_context();
 113    struct matrix *dst = vg_state_matrix(&ctx->state.vg);
 114    matrix_scale(dst, sx, sy);
 115 }
 116
 117 void vegaShear(VGfloat shx, VGfloat shy)
 118 {
 119    struct vg_context *ctx = vg_current_context();
 120    struct matrix *dst = vg_state_matrix(&ctx->state.vg);
 121    matrix_shear(dst, shx, shy);
 122 }
 123
 124 void vegaRotate(VGfloat angle)
 125 {
 126    struct vg_context *ctx = vg_current_context();
 127    struct matrix *dst = vg_state_matrix(&ctx->state.vg);
 128    matrix_rotate(dst, angle);
 129 }