92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
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#include "./single.h"
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#include <assert.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <GL/glew.h>
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#include "util/gleasy/buffer.h"
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#include "util/gleasy/program.h"
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#include "./uniblock.h"
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#define UNIBLOCK_INDEX_ 0
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#define PARAM_INDEX_ 1
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void loshader_single_drawer_initialize(
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loshader_single_drawer_t* drawer,
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gleasy_program_t prog,
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const loshader_uniblock_t* uniblock,
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size_t param_size) {
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assert(drawer != NULL);
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assert(uniblock != NULL);
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const GLuint uniblock_index = glGetUniformBlockIndex(prog, "uniblock");
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assert(glGetError() == GL_NO_ERROR);
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glUniformBlockBinding(prog, uniblock_index, UNIBLOCK_INDEX_);
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if (param_size > 0) {
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const GLuint param_index = glGetUniformBlockIndex(prog, "param");
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assert(glGetError() == GL_NO_ERROR);
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glUniformBlockBinding(prog, param_index, PARAM_INDEX_);
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}
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*drawer = (typeof(*drawer)) {
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.prog = prog,
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.uniblock = uniblock,
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.param_size = param_size,
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};
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if (param_size > 0) {
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glGenBuffers(1, &drawer->param);
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glBindBuffer(GL_UNIFORM_BUFFER, drawer->param);
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glBufferData(GL_UNIFORM_BUFFER, param_size, NULL, GL_DYNAMIC_DRAW);
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}
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}
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void loshader_single_drawer_deinitialize(loshader_single_drawer_t* drawer) {
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assert(drawer != NULL);
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if (drawer->param_size > 0) {
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glDeleteBuffers(1, &drawer->param);
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}
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glDeleteProgram(drawer->prog);
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}
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void loshader_single_drawer_set_param(
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loshader_single_drawer_t* drawer, const void* ptr) {
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assert(drawer != NULL);
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assert(drawer->param_size > 0);
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assert(ptr != NULL);
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glBindBuffer(GL_UNIFORM_BUFFER, drawer->param);
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glBufferSubData(GL_UNIFORM_BUFFER, 0, drawer->param_size, ptr);
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}
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void loshader_single_drawer_draw(
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const loshader_single_drawer_t* drawer, size_t primitives) {
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assert(drawer != NULL);
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if (primitives == 0) return;
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glUseProgram(drawer->prog);
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loshader_single_drawer_draw_without_use_program(drawer, primitives);
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}
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void loshader_single_drawer_draw_without_use_program(
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const loshader_single_drawer_t* drawer, size_t primitives) {
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assert(drawer != NULL);
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if (primitives == 0) return;
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loshader_uniblock_bind(drawer->uniblock, UNIBLOCK_INDEX_);
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if (drawer->param_size > 0) {
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glBindBufferBase(GL_UNIFORM_BUFFER, PARAM_INDEX_, drawer->param);
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}
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glDrawArrays(GL_TRIANGLES, 0, primitives);
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}
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