1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
#include "OpenGLRendererAPI.h"
#include <glad/glad.h>
#include <GLFW/glfw3.h>
namespace Donut
{
void OpenGLRendererAPI::Init()
{
if (!glfwGetCurrentContext())
{
DONUT_ERROR("No OpenGL context is current! Cannot initialize GLAD.");
return;
}
if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
{
DONUT_ERROR("Failed to initialize GLAD!");
return;
}
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LESS);
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
glFrontFace(GL_CCW);
}
void OpenGLRendererAPI::SetViewport(uint32_t x, uint32_t y, uint32_t width, uint32_t height)
{
glViewport(x, y, width, height);
}
void OpenGLRendererAPI::SetClearColor(const glm::vec4& color)
{
glClearColor(color.r, color.g, color.b, color.a);
}
void OpenGLRendererAPI::Clear()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}
void OpenGLRendererAPI::EnableDepthTest()
{
glEnable(GL_DEPTH_TEST);
}
void OpenGLRendererAPI::DisableDepthTest()
{
glDisable(GL_DEPTH_TEST);
}
void OpenGLRendererAPI::SetFaceCulling(bool enabled)
{
if (enabled)
{
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
glFrontFace(GL_CCW);
}
else
glDisable(GL_CULL_FACE);
}
void OpenGLRendererAPI::EnableBlending()
{
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
void OpenGLRendererAPI::DisableBlending()
{
glDisable(GL_BLEND);
}
void OpenGLRendererAPI::DrawIndexed(const Ref<VertexArray>& vertexArray, uint32_t indexCount)
{
uint32_t count = indexCount ? indexCount : vertexArray->GetIndexBuffer()->GetCount();
glDrawElements(GL_TRIANGLES, count, GL_UNSIGNED_INT, nullptr);
glBindTexture(GL_TEXTURE_2D, 0);
}
};
|
