104 lines
3.0 KiB
C
104 lines
3.0 KiB
C
#include "./hud_bar.h"
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "util/gleasy/program.h"
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#include "util/math/vector.h"
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#include "./instanced.h"
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#include "./uniblock.h"
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/* resources */
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#include "core/loshader/anysrc/header.shader.h"
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#include "core/loshader/anysrc/hud_bar.vshader.h"
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#include "core/loshader/anysrc/hud_bar.fshader.h"
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#define VSHADER_IN_POS_ 0
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#define VSHADER_IN_SIZE_ 1
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#define VSHADER_IN_BGCOLOR_ 2
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#define VSHADER_IN_FGCOLOR_ 3
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#define VSHADER_IN_VALUE_ 4
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#define VSHADER_IN_PREV_VALUE_ 5
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#define PRIMITIVE_COUNT_ 18
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#pragma pack(push, 1)
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typedef struct {
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vec2_t pos;
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vec2_t size;
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vec4_t bgcolor;
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vec4_t fgcolor;
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float value;
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float prev_value;
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} loshader_hud_bar_drawer_internal_instance_t;
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#pragma pack(pop)
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void loshader_hud_bar_drawer_initialize(
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loshader_hud_bar_drawer_t* drawer,
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const loshader_uniblock_t* uniblock) {
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assert(drawer != NULL);
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assert(uniblock != NULL);
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const gleasy_program_t prog = gleasy_program_new(
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loshader_header_shader_, sizeof(loshader_header_shader_),
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loshader_hud_bar_vshader_, sizeof(loshader_hud_bar_vshader_),
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loshader_hud_bar_fshader_, sizeof(loshader_hud_bar_fshader_));
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loshader_instanced_drawer_initialize(
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&drawer->super,
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prog,
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uniblock,
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sizeof(loshader_hud_bar_drawer_internal_instance_t));
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glBindVertexArray(drawer->super.vao);
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glBindBuffer(GL_ARRAY_BUFFER, drawer->super.instances);
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# define enable_(index, var, dim, type) do { \
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glEnableVertexAttribArray(index); \
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glVertexAttribPointer( \
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index, dim, type, GL_FALSE, \
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sizeof(loshader_hud_bar_drawer_internal_instance_t), \
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NULL + offsetof(loshader_hud_bar_drawer_internal_instance_t, var)); \
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glVertexAttribDivisor(index, 1); \
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} while (0)
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enable_(VSHADER_IN_POS_, pos, 2, GL_FLOAT);
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enable_(VSHADER_IN_SIZE_, size, 2, GL_FLOAT);
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enable_(VSHADER_IN_BGCOLOR_, bgcolor, 4, GL_FLOAT);
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enable_(VSHADER_IN_FGCOLOR_, fgcolor, 4, GL_FLOAT);
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enable_(VSHADER_IN_VALUE_, value, 1, GL_FLOAT);
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enable_(VSHADER_IN_PREV_VALUE_, prev_value, 1, GL_FLOAT);
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# undef enable_
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}
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void loshader_hud_bar_drawer_add_instance(
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loshader_hud_bar_drawer_t* drawer,
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const loshader_hud_bar_drawer_instance_t* instance) {
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assert(drawer != NULL);
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assert(instance != NULL);
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const loshader_hud_bar_drawer_internal_instance_t insta = {
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.pos = instance->pos,
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.size = instance->size,
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.bgcolor = instance->bgcolor,
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.fgcolor = instance->fgcolor,
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.value = instance->value,
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.prev_value = instance->prev_value,
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};
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if (!loshader_instanced_drawer_add_instance(&drawer->super, &insta)) {
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fprintf(stderr, "hud bar drawer instance overflow\n");
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abort();
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}
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}
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void loshader_hud_bar_drawer_draw(const loshader_hud_bar_drawer_t* drawer) {
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assert(drawer != NULL);
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loshader_instanced_drawer_draw(&drawer->super, PRIMITIVE_COUNT_);
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}
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