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[client] egl: use vertex array objects in model.c

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This eliminates the need to bind the buffers and set up the vertices on
every frame.
This commit is contained in:
Quantum 2021-07-17 21:44:59 -04:00 committed by Geoffrey McRae
parent d4f8426ae4
commit 061b9ba6c2
1 changed files with 18 additions and 8 deletions
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26
client/renderers/EGL/model.c
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@ -38,6 +38,7 @@ struct EGL_Model
bool finish;
GLuint buffer;
GLuint vao;
EGL_Shader * shader;
EGL_Texture * texture;
@ -85,6 +86,9 @@ void egl_model_free(EGL_Model ** model)
if ((*model)->buffer)
glDeleteBuffers(1, &(*model)->buffer);
if ((*model)->vao)
glDeleteVertexArrays(1, &(*model)->vao);
free(*model);
*model = NULL;
}
@ -139,6 +143,11 @@ void egl_model_render(EGL_Model * model)
if (model->buffer)
glDeleteBuffers(1, &model->buffer);
if (!model->vao)
glGenVertexArrays(1, &model->vao);
glBindVertexArray(model->vao);
/* create a buffer large enough */
glGenBuffers(1, &model->buffer);
glBindBuffer(GL_ARRAY_BUFFER, model->buffer);
@ -161,16 +170,18 @@ void egl_model_render(EGL_Model * model)
offset += sizeof(GLfloat) * fl->count * 2;
}
/* set up vertex arrays in the VAO */
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, (void*)0);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 0, (void*)(sizeof(GLfloat) * model->vertexCount * 3));
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(0);
model->rebuild = false;
}
/* bind the model buffer and setup the pointers */
glBindBuffer(GL_ARRAY_BUFFER, model->buffer);
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, (void*)0);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 0, (void*)(sizeof(GLfloat) * model->vertexCount * 3));
glBindVertexArray(model->vao);
if (model->shader)
egl_shader_use(model->shader);
@ -189,8 +200,7 @@ void egl_model_render(EGL_Model * model)
/* unbind and cleanup */
glBindTexture(GL_TEXTURE_2D, 0);
glDisableVertexAttribArray(0);
glDisableVertexAttribArray(1);
glBindVertexArray(0);
glUseProgram(0);
}