diff options
Diffstat (limited to 'src/renderer/texture.cpp')
-rw-r--r-- | src/renderer/texture.cpp | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/src/renderer/texture.cpp b/src/renderer/texture.cpp new file mode 100644 index 0000000..04d5cf4 --- /dev/null +++ b/src/renderer/texture.cpp | |||
@@ -0,0 +1,120 @@ | |||
1 | #include "texture.h" | ||
2 | #include <stdexcept> | ||
3 | #include <stb_image.h> | ||
4 | #include "renderer.h" | ||
5 | #include "util.h" | ||
6 | |||
7 | Texture::Texture( | ||
8 | int width, | ||
9 | int height) : | ||
10 | width_(width), | ||
11 | height_(height) | ||
12 | { | ||
13 | if (!Renderer::isSingletonInitialized()) | ||
14 | { | ||
15 | throw std::logic_error("Renderer needs to be initialized"); | ||
16 | } | ||
17 | |||
18 | glBindTexture(GL_TEXTURE_2D, texture_.getId()); | ||
19 | glTexImage2D( | ||
20 | GL_TEXTURE_2D, | ||
21 | 0, | ||
22 | GL_RGBA, | ||
23 | width_, | ||
24 | height_, | ||
25 | 0, | ||
26 | GL_RGBA, | ||
27 | GL_UNSIGNED_BYTE, | ||
28 | 0); | ||
29 | |||
30 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); | ||
31 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); | ||
32 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); | ||
33 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); | ||
34 | } | ||
35 | |||
36 | Texture::Texture(const char* filename) | ||
37 | { | ||
38 | if (!Renderer::isSingletonInitialized()) | ||
39 | { | ||
40 | throw std::logic_error("Renderer needs to be initialized"); | ||
41 | } | ||
42 | |||
43 | glBindTexture(GL_TEXTURE_2D, texture_.getId()); | ||
44 | unsigned char* data = stbi_load(filename, &width_, &height_, 0, 4); | ||
45 | flipImageData(data, width_, height_, 4); | ||
46 | glTexImage2D( | ||
47 | GL_TEXTURE_2D, | ||
48 | 0, | ||
49 | GL_RGBA, | ||
50 | width_, | ||
51 | height_, | ||
52 | 0, | ||
53 | GL_RGBA, | ||
54 | GL_UNSIGNED_BYTE, | ||
55 | data); | ||
56 | |||
57 | stbi_image_free(data); | ||
58 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); | ||
59 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); | ||
60 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); | ||
61 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); | ||
62 | } | ||
63 | |||
64 | Texture::Texture( | ||
65 | const Texture& tex) : | ||
66 | width_(tex.width_), | ||
67 | height_(tex.height_) | ||
68 | { | ||
69 | if (!Renderer::isSingletonInitialized()) | ||
70 | { | ||
71 | throw std::logic_error("Renderer needs to be initialized"); | ||
72 | } | ||
73 | |||
74 | unsigned char* data = new unsigned char[4 * width_ * height_]; | ||
75 | glBindTexture(GL_TEXTURE_2D, tex.getId()); | ||
76 | glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE, data); | ||
77 | |||
78 | glBindTexture(GL_TEXTURE_2D, texture_.getId()); | ||
79 | glTexImage2D( | ||
80 | GL_TEXTURE_2D, | ||
81 | 0, | ||
82 | GL_RGBA, | ||
83 | width_, | ||
84 | height_, | ||
85 | 0, | ||
86 | GL_RGBA, | ||
87 | GL_UNSIGNED_BYTE, | ||
88 | data); | ||
89 | |||
90 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); | ||
91 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); | ||
92 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); | ||
93 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); | ||
94 | |||
95 | delete[] data; | ||
96 | } | ||
97 | |||
98 | Texture::Texture(Texture&& tex) : Texture(0, 0) | ||
99 | { | ||
100 | swap(*this, tex); | ||
101 | } | ||
102 | |||
103 | Texture& Texture::operator= (Texture tex) | ||
104 | { | ||
105 | swap(*this, tex); | ||
106 | |||
107 | return *this; | ||
108 | } | ||
109 | |||
110 | void swap(Texture& tex1, Texture& tex2) | ||
111 | { | ||
112 | std::swap(tex1.width_, tex2.width_); | ||
113 | std::swap(tex1.height_, tex2.height_); | ||
114 | std::swap(tex1.texture_, tex2.texture_); | ||
115 | } | ||
116 | |||
117 | Rectangle Texture::entirety() const | ||
118 | { | ||
119 | return {0, 0, width_, height_}; | ||
120 | } | ||