f53df7da64
Code submissions have continually suffered from formatting inconsistencies that constantly have to be addressed. Using clang-format simplifies this by making code formatting more consistent, and allows automation of the code formatting so that maintainers can focus more on the code itself instead of code formatting.
278 lines
7.0 KiB
C
278 lines
7.0 KiB
C
/******************************************************************************
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Copyright (C) 2013 by Hugh Bailey <obs.jim@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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******************************************************************************/
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#include <graphics/vec3.h>
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#include "gl-subsystem.h"
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static bool create_buffers(struct gs_vertex_buffer *vb)
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{
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GLenum usage = vb->dynamic ? GL_STREAM_DRAW : GL_STATIC_DRAW;
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size_t i;
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if (!gl_create_buffer(GL_ARRAY_BUFFER, &vb->vertex_buffer,
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vb->data->num * sizeof(struct vec3),
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vb->data->points, usage))
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return false;
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if (vb->data->normals) {
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if (!gl_create_buffer(GL_ARRAY_BUFFER, &vb->normal_buffer,
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vb->data->num * sizeof(struct vec3),
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vb->data->normals, usage))
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return false;
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}
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if (vb->data->tangents) {
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if (!gl_create_buffer(GL_ARRAY_BUFFER, &vb->tangent_buffer,
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vb->data->num * sizeof(struct vec3),
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vb->data->tangents, usage))
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return false;
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}
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if (vb->data->colors) {
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if (!gl_create_buffer(GL_ARRAY_BUFFER, &vb->color_buffer,
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vb->data->num * sizeof(uint32_t),
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vb->data->colors, usage))
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return false;
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}
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da_reserve(vb->uv_buffers, vb->data->num_tex);
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da_reserve(vb->uv_sizes, vb->data->num_tex);
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for (i = 0; i < vb->data->num_tex; i++) {
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GLuint tex_buffer;
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struct gs_tvertarray *tv = vb->data->tvarray + i;
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size_t size = vb->data->num * sizeof(float) * tv->width;
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if (!gl_create_buffer(GL_ARRAY_BUFFER, &tex_buffer, size,
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tv->array, usage))
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return false;
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da_push_back(vb->uv_buffers, &tex_buffer);
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da_push_back(vb->uv_sizes, &tv->width);
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}
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if (!vb->dynamic) {
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gs_vbdata_destroy(vb->data);
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vb->data = NULL;
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}
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if (!gl_gen_vertex_arrays(1, &vb->vao))
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return false;
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return true;
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}
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gs_vertbuffer_t *device_vertexbuffer_create(gs_device_t *device,
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struct gs_vb_data *data,
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uint32_t flags)
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{
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struct gs_vertex_buffer *vb = bzalloc(sizeof(struct gs_vertex_buffer));
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vb->device = device;
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vb->data = data;
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vb->num = data->num;
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vb->dynamic = flags & GS_DYNAMIC;
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if (!create_buffers(vb)) {
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blog(LOG_ERROR, "device_vertexbuffer_create (GL) failed");
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gs_vertexbuffer_destroy(vb);
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return NULL;
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}
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return vb;
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}
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void gs_vertexbuffer_destroy(gs_vertbuffer_t *vb)
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{
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if (vb) {
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if (vb->vertex_buffer)
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gl_delete_buffers(1, &vb->vertex_buffer);
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if (vb->normal_buffer)
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gl_delete_buffers(1, &vb->normal_buffer);
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if (vb->tangent_buffer)
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gl_delete_buffers(1, &vb->tangent_buffer);
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if (vb->color_buffer)
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gl_delete_buffers(1, &vb->color_buffer);
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if (vb->uv_buffers.num)
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gl_delete_buffers((GLsizei)vb->uv_buffers.num,
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vb->uv_buffers.array);
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if (vb->vao)
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gl_delete_vertex_arrays(1, &vb->vao);
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da_free(vb->uv_sizes);
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da_free(vb->uv_buffers);
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gs_vbdata_destroy(vb->data);
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bfree(vb);
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}
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}
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static inline void gs_vertexbuffer_flush_internal(gs_vertbuffer_t *vb,
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const struct gs_vb_data *data)
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{
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size_t i;
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size_t num_tex = data->num_tex < vb->data->num_tex ? data->num_tex
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: vb->data->num_tex;
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if (!vb->dynamic) {
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blog(LOG_ERROR, "vertex buffer is not dynamic");
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goto failed;
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}
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if (data->points) {
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if (!update_buffer(GL_ARRAY_BUFFER, vb->vertex_buffer,
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data->points,
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data->num * sizeof(struct vec3)))
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goto failed;
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}
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if (vb->normal_buffer && data->normals) {
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if (!update_buffer(GL_ARRAY_BUFFER, vb->normal_buffer,
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data->normals,
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data->num * sizeof(struct vec3)))
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goto failed;
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}
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if (vb->tangent_buffer && data->tangents) {
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if (!update_buffer(GL_ARRAY_BUFFER, vb->tangent_buffer,
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data->tangents,
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data->num * sizeof(struct vec3)))
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goto failed;
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}
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if (vb->color_buffer && data->colors) {
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if (!update_buffer(GL_ARRAY_BUFFER, vb->color_buffer,
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data->colors, data->num * sizeof(uint32_t)))
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goto failed;
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}
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for (i = 0; i < num_tex; i++) {
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GLuint buffer = vb->uv_buffers.array[i];
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struct gs_tvertarray *tv = data->tvarray + i;
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size_t size = data->num * tv->width * sizeof(float);
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if (!update_buffer(GL_ARRAY_BUFFER, buffer, tv->array, size))
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goto failed;
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}
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return;
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failed:
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blog(LOG_ERROR, "gs_vertexbuffer_flush (GL) failed");
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}
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void gs_vertexbuffer_flush(gs_vertbuffer_t *vb)
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{
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gs_vertexbuffer_flush_internal(vb, vb->data);
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}
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void gs_vertexbuffer_flush_direct(gs_vertbuffer_t *vb,
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const struct gs_vb_data *data)
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{
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gs_vertexbuffer_flush_internal(vb, data);
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}
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struct gs_vb_data *gs_vertexbuffer_get_data(const gs_vertbuffer_t *vb)
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{
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return vb->data;
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}
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static inline GLuint get_vb_buffer(struct gs_vertex_buffer *vb,
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enum attrib_type type, size_t index,
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GLint *width, GLenum *gl_type)
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{
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*gl_type = GL_FLOAT;
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*width = 4;
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if (type == ATTRIB_POSITION) {
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return vb->vertex_buffer;
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} else if (type == ATTRIB_NORMAL) {
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return vb->normal_buffer;
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} else if (type == ATTRIB_TANGENT) {
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return vb->tangent_buffer;
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} else if (type == ATTRIB_COLOR) {
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*gl_type = GL_UNSIGNED_BYTE;
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return vb->color_buffer;
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} else if (type == ATTRIB_TEXCOORD) {
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if (vb->uv_buffers.num <= index)
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return 0;
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*width = (GLint)vb->uv_sizes.array[index];
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return vb->uv_buffers.array[index];
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}
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return 0;
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}
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static bool load_vb_buffer(struct shader_attrib *attrib,
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struct gs_vertex_buffer *vb, GLint id)
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{
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GLenum type;
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GLint width;
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GLuint buffer;
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bool success = true;
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buffer = get_vb_buffer(vb, attrib->type, attrib->index, &width, &type);
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if (!buffer) {
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blog(LOG_ERROR, "Vertex buffer does not have the required "
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"inputs for vertex shader");
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return false;
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}
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if (!gl_bind_buffer(GL_ARRAY_BUFFER, buffer))
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return false;
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glVertexAttribPointer(id, width, type, GL_TRUE, 0, 0);
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if (!gl_success("glVertexAttribPointer"))
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success = false;
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glEnableVertexAttribArray(id);
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if (!gl_success("glEnableVertexAttribArray"))
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success = false;
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if (!gl_bind_buffer(GL_ARRAY_BUFFER, 0))
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success = false;
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return success;
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}
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bool load_vb_buffers(struct gs_program *program, struct gs_vertex_buffer *vb,
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struct gs_index_buffer *ib)
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{
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struct gs_shader *shader = program->vertex_shader;
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size_t i;
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if (vb && !gl_bind_vertex_array(vb->vao))
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return false;
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for (i = 0; i < shader->attribs.num; i++) {
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struct shader_attrib *attrib = shader->attribs.array + i;
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if (!load_vb_buffer(attrib, vb, program->attribs.array[i]))
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return false;
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}
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if (ib && !gl_bind_buffer(GL_ELEMENT_ARRAY_BUFFER, ib->buffer))
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return false;
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return true;
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}
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void device_load_vertexbuffer(gs_device_t *device, gs_vertbuffer_t *vb)
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{
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device->cur_vertex_buffer = vb;
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}
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