forked from Qortal/Brooklyn
122 lines
3.4 KiB
C
122 lines
3.4 KiB
C
/*
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Copyright (c) 2013, Broadcom Europe Ltd
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Copyright (c) 2013, Tim Gover
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the copyright holder nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <GLES/gl.h>
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#include <GLES/glext.h>
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#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#include "RaspiTexUtil.h"
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/* Vertex co-ordinates:
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*
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* v0----v1
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* | |
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* | |
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* | |
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* v3----v2
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*/
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static const GLfloat vertices[] =
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{
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#define V0 -0.8, 0.8, 0.8,
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#define V1 0.8, 0.8, 0.8,
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#define V2 0.8, -0.8, 0.8,
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#define V3 -0.8, -0.8, 0.8,
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V0 V3 V2 V2 V1 V0
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};
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/* Texture co-ordinates:
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*
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* (0,0) b--c
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* | |
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* a--d
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*
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* b,a,d d,c,b
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*/
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static const GLfloat tex_coords[] =
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{
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0, 0, 0, 1, 1, 1,
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1, 1, 1, 0, 0, 0
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};
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static GLfloat angle;
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static uint32_t anim_step;
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static int square_init(RASPITEX_STATE *state)
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{
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int rc = raspitexutil_gl_init_1_0(state);
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if (rc != 0)
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goto end;
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angle = 0.0f;
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anim_step = 0;
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glClearColor(0, 0, 0, 0);
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glClearDepthf(1);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glLoadIdentity();
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end:
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return rc;
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}
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static int square_update_model(RASPITEX_STATE *state)
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{
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int frames_per_rev = 30 * 15;
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(void) state;
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angle = (anim_step * 360) / (GLfloat) frames_per_rev;
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anim_step = (anim_step + 1) % frames_per_rev;
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return 0;
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}
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static int square_redraw(RASPITEX_STATE *state)
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{
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/* Bind the OES texture which is used to render the camera preview */
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GLCHK(glBindTexture(GL_TEXTURE_EXTERNAL_OES, state->texture));
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glLoadIdentity();
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glRotatef(angle, 0.0, 0.0, 1.0);
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glEnableClientState(GL_VERTEX_ARRAY);
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glVertexPointer(3, GL_FLOAT, 0, vertices);
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glDisableClientState(GL_COLOR_ARRAY);
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glEnableClientState(GL_TEXTURE_COORD_ARRAY);
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glTexCoordPointer(2, GL_FLOAT, 0, tex_coords);
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GLCHK(glDrawArrays(GL_TRIANGLES, 0, vcos_countof(tex_coords) / 2));
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return 0;
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}
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int square_open(RASPITEX_STATE *state)
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{
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state->ops.gl_init = square_init;
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state->ops.update_model = square_update_model;
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state->ops.redraw = square_redraw;
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state->ops.update_texture = raspitexutil_update_texture;
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return 0;
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}
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