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