Sun, 11 Aug 2024 16:29:09 +0200
redesign FPS counter
3 | 1 | /* |
2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. | |
3 | * Copyright 2023 Mike Becker. All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions are met: | |
7 | * | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * | |
11 | * 2. Redistributions in binary form must reproduce the above copyright | |
12 | * notice, this list of conditions and the following disclaimer in the | |
13 | * documentation and/or other materials provided with the distribution. | |
14 | * | |
15 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
16 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
17 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
18 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
19 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
20 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
21 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
22 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
23 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
24 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
25 | * POSSIBILITY OF SUCH DAMAGE. | |
26 | */ | |
27 | ||
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28 | #include "ascension/primitives.h" |
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29 | #include "ascension/error.h" |
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30 | #include "ascension/context.h" |
3 | 31 | |
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32 | #include <string.h> |
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33 | #include <GL/glew.h> |
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34 | |
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35 | static void asc_primitives_init_plane(AscMesh *mesh) { |
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36 | asc_dprintf("Create primitive plane in VBO %u and VAO %u", mesh->vbo, mesh->vao); |
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37 | mesh->vertices = 4; |
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38 | float data[8] = { |
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39 | 0.0f, 0.0f, // bottom left |
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40 | 0.0f, 1.0f, // top left |
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41 | 1.0f, 0.0f, // bottom right |
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42 | 1.0f, 1.0f // top right |
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43 | }; |
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44 | glBindBuffer(GL_ARRAY_BUFFER, mesh->vbo); |
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45 | glBufferData(GL_ARRAY_BUFFER, sizeof(data), data, GL_STATIC_DRAW); |
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46 | glBindVertexArray(mesh->vao); |
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47 | glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, NULL); |
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48 | glEnableVertexAttribArray(0); |
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49 | } |
3 | 50 | |
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51 | bool asc_primitives_init(AscPrimitives *primitives) { |
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52 | asc_dprintf("Create primitives for the GL context of active window."); |
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53 | // TODO: more primitives |
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54 | |
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55 | GLuint buffers[1]; |
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56 | GLuint arrays[1]; |
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57 | glGenBuffers(1, buffers); |
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58 | glGenVertexArrays(1, arrays); |
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59 | |
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60 | AscMesh *plane = &(primitives->plane); |
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61 | plane->vbo = buffers[0]; |
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62 | plane->vao = arrays[0]; |
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63 | asc_primitives_init_plane(plane); |
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64 | |
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65 | GLenum error = glGetError(); |
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66 | if (error == GL_NO_ERROR) { |
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67 | return true; |
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68 | } else { |
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69 | asc_error_gl(error, CX_STR("Initialization of primitive meshes failed.")); |
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70 | return false; |
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71 | } |
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72 | } |
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73 | |
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74 | void asc_primitives_destroy(AscPrimitives *primitives) { |
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75 | asc_dprintf("Destroy primitives in GL context of active window."); |
11 | 76 | |
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77 | GLuint buffers[1]; |
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78 | GLuint arrays[1]; |
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79 | |
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80 | buffers[0] = primitives->plane.vbo; |
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81 | arrays[0] = primitives->plane.vao; |
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82 | |
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83 | glDeleteBuffers(1, buffers); |
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84 | glDeleteVertexArrays(1, arrays); |
11 | 85 | |
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86 | memset(primitives, 0, sizeof(AscPrimitives)); |
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87 | } |
3 | 88 | |
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89 | void asc_primitives_draw_plane(void) { |
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90 | AscMesh const *mesh = &(asc_active_window->glctx.primitives.plane); |
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91 | glBindVertexArray(mesh->vao); |
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92 | glDrawArrays(GL_TRIANGLE_STRIP, 0, mesh->vertices); |
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93 | } |