132 lines
3.4 KiB
C
132 lines
3.4 KiB
C
#include "./fog.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 "util/gleasy/buffer.h"
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#include "util/gleasy/program.h"
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#include "util/math/vector.h"
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#include "util/memory/memory.h"
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#include "core/locommon/position.h"
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#include "./uniblock.h"
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/* resources */
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#include "anysrc/header.shader.h"
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#include "anysrc/fog.vshader.h"
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#include "anysrc/fog.fshader.h"
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struct loshader_fog_drawer_t {
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const loshader_fog_program_t* prog;
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const loshader_uniblock_t* uniblock;
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gleasy_buffer_uniform_t param;
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};
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#pragma pack(push, 1)
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typedef struct {
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float type;
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float prev_type;
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float transition;
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float bounds_fog;
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vec4_t bounds_pos;
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vec2_t bounds_size;
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} loshader_fog_drawer_internal_param_t;
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_Static_assert(
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sizeof(float)*10 ==
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sizeof(loshader_fog_drawer_internal_param_t));
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#pragma pack(pop)
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#define LOSHADER_FOG_UNIBLOCK_INDEX 0
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#define LOSHADER_FOG_PARAM_INDEX 1
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#define LOSHADER_FOG_PRIMITIVE_COUNT 6
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void loshader_fog_program_initialize(loshader_fog_program_t* prog) {
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assert(prog != NULL);
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*prog = gleasy_program_new(
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loshader_header_shader_, sizeof(loshader_header_shader_),
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loshader_fog_vshader_, sizeof(loshader_fog_vshader_),
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loshader_fog_fshader_, sizeof(loshader_fog_fshader_));
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const GLuint uniblock = glGetUniformBlockIndex(*prog, "uniblock");
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assert(glGetError() == GL_NO_ERROR);
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glUniformBlockBinding(*prog, uniblock, LOSHADER_FOG_UNIBLOCK_INDEX);
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const GLuint param = glGetUniformBlockIndex(*prog, "param");
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assert(glGetError() == GL_NO_ERROR);
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glUniformBlockBinding(*prog, param, LOSHADER_FOG_PARAM_INDEX);
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}
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void loshader_fog_program_deinitialize(loshader_fog_program_t* prog) {
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assert(prog != NULL);
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glDeleteProgram(*prog);
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}
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loshader_fog_drawer_t* loshader_fog_drawer_new(
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const loshader_fog_program_t* prog,
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const loshader_uniblock_t* uniblock) {
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assert(prog != NULL);
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assert(uniblock != NULL);
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loshader_fog_drawer_t* drawer = memory_new(sizeof(*drawer));
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*drawer = (typeof(*drawer)) {
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.prog = prog,
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.uniblock = uniblock,
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};
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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,
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sizeof(loshader_fog_drawer_internal_param_t), NULL, GL_DYNAMIC_DRAW);
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return drawer;
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}
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void loshader_fog_drawer_delete(loshader_fog_drawer_t* drawer) {
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if (drawer == NULL) return;
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glDeleteBuffers(1, &drawer->param);
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memory_delete(drawer);
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}
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void loshader_fog_drawer_set_param(
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loshader_fog_drawer_t* drawer,
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const loshader_fog_drawer_param_t* param) {
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assert(drawer != NULL);
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assert(param != NULL);
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const loshader_fog_drawer_internal_param_t p = {
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.type = param->type,
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.prev_type = param->prev_type,
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.transition = param->transition,
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.bounds_fog = param->bounds_fog,
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.bounds_pos = vec4(
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param->bounds_pos.chunk.x,
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param->bounds_pos.chunk.y,
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param->bounds_pos.fract.x,
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param->bounds_pos.fract.y),
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.bounds_size = param->bounds_size,
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};
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glBindBuffer(GL_UNIFORM_BUFFER, drawer->param);
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glBufferSubData(GL_UNIFORM_BUFFER, 0, sizeof(p), &p);
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}
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void loshader_fog_drawer_draw(const loshader_fog_drawer_t* drawer) {
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assert(drawer != NULL);
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glUseProgram(*drawer->prog);
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loshader_uniblock_bind(drawer->uniblock, LOSHADER_FOG_UNIBLOCK_INDEX);
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glBindBufferBase(GL_UNIFORM_BUFFER,
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LOSHADER_FOG_PARAM_INDEX, drawer->param);
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glDrawArrays(GL_TRIANGLES, 0, LOSHADER_FOG_PRIMITIVE_COUNT);
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}
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