mirror of
https://github.com/gnif/LookingGlass.git
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159 lines
3.9 KiB
C
159 lines
3.9 KiB
C
/*
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Looking Glass - KVM FrameRelay (KVMFR) Client
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Copyright (C) 2017 Geoffrey McRae <geoff@hostfission.com>
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https://looking-glass.hostfission.com
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any later
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version.
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This program is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "egl_model.h"
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#include "egl_shader.h"
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#include "egl_texture.h"
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#include "debug.h"
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#include "utils.h"
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <SDL2/SDL_egl.h>
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struct EGL_Model
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{
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bool hasVertexBuffer;
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GLuint vertexBuffer;
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GLsizei vertexCount;
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bool hasUVBuffer;
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GLuint uvBuffer;
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EGL_Shader * shader;
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EGL_Texture * texture;
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};
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void update_uniform_bindings(EGL_Model * model);
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bool egl_model_init(EGL_Model ** model)
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{
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*model = (EGL_Model *)malloc(sizeof(EGL_Model));
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if (!*model)
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{
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DEBUG_ERROR("Failed to malloc EGL_Model");
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return false;
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}
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memset(*model, 0, sizeof(EGL_Model));
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return true;
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}
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void egl_model_free(EGL_Model ** model)
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{
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if (!*model)
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return;
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if ((*model)->hasVertexBuffer)
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glDeleteBuffers(1, &(*model)->vertexBuffer);
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if ((*model)->hasUVBuffer)
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glDeleteBuffers(1, &(*model)->uvBuffer);
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free(*model);
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*model = NULL;
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}
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void egl_model_set_verticies(EGL_Model * model, const GLfloat * verticies, const size_t count)
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{
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if (model->hasVertexBuffer)
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glDeleteBuffers(1, &model->vertexBuffer);
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glGenBuffers(1, &model->vertexBuffer);
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glBindBuffer(GL_ARRAY_BUFFER, model->vertexBuffer);
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glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat) * count, verticies, GL_STATIC_DRAW);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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model->hasVertexBuffer = true;
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model->vertexCount = count / 3;
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}
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void egl_model_set_uvs(EGL_Model * model, const GLfloat * uvs, const size_t count)
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{
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if (model->hasUVBuffer)
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glDeleteBuffers(1, &model->uvBuffer);
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glGenBuffers(1, &model->uvBuffer);
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glBindBuffer(GL_ARRAY_BUFFER, model->uvBuffer);
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glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat) * count, uvs, GL_STATIC_DRAW);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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model->hasUVBuffer = true;
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}
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void egl_model_render(EGL_Model * model)
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{
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if (!model->hasVertexBuffer)
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{
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DEBUG_ERROR("Model has no verticies");
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return;
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}
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if (model->shader)
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egl_shader_use(model->shader);
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GLuint location = 0;
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glEnableVertexAttribArray(location);
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glBindBuffer(GL_ARRAY_BUFFER, model->vertexBuffer);
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glVertexAttribPointer(location, 3, GL_FLOAT, GL_FALSE, 0, (void*)0);
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if (model->hasUVBuffer)
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{
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++location;
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glEnableVertexAttribArray(location);
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glBindBuffer(GL_ARRAY_BUFFER, model->uvBuffer);
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glVertexAttribPointer(location, 2, GL_FLOAT, GL_FALSE, 0, (void*)0);
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}
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if (model->texture)
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egl_texture_bind(model->texture);
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glDrawArrays(GL_TRIANGLE_STRIP, 0, model->vertexCount);
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glBindTexture(GL_TEXTURE_2D, 0);
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while(location > 0)
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glDisableVertexAttribArray(location--);
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glDisableVertexAttribArray(0);
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glUseProgram(0);
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}
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void egl_model_set_shader(EGL_Model * model, EGL_Shader * shader)
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{
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model->shader = shader;
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update_uniform_bindings(model);
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}
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void egl_model_set_texture(EGL_Model * model, EGL_Texture * texture)
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{
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model->texture = texture;
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update_uniform_bindings(model);
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}
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void update_uniform_bindings(EGL_Model * model)
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{
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if (!model->shader || !model->texture)
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return;
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const int count = egl_texture_count(model->texture);
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egl_shader_associate_textures(model->shader, count);
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} |