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https://github.com/korenkonder/ReDIVA.git
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korenkonder
@@ -0,0 +1,333 @@
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/*
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by korenkonder
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GitHub/GitLab: korenkonder
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*/
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#include "render_texture.hpp"
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#include "gl_state.hpp"
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#include "texture.hpp"
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static shader_glsl render_texture_shader;
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static GLuint render_texture_vao, render_texture_vbo;
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static bool render_texture_data_initialized;
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static uint32_t render_texture_counter;
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static int32_t render_texture_framebuffer_init(render_texture* rt, int32_t max_level);
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static int32_t render_texture_framebuffer_set_texture(render_texture* rrt,
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GLuint color_texture, int32_t level, GLuint depth_texture, bool stencil);
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render_texture::render_texture() : color_texture(),
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depth_texture(), binding(), max_level(), fbos(), rbo(), field_2C() {
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}
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render_texture::~render_texture() {
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free_data();
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}
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int32_t render_texture::bind(int32_t index) {
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if (index < 0 || index > max_level)
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return -1;
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gl_state_bind_framebuffer(fbos[index]);
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if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
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return -1;
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glGetError();
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return 0;
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}
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void render_texture::draw(bool depth) {
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gl_state_active_bind_texture_2d(0, color_texture->tex);
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if (depth && depth_texture->tex)
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gl_state_active_bind_texture_2d(1, depth_texture->tex);
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gl_state_bind_vertex_array(render_texture_vao);
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glDrawArrays(GL_TRIANGLE_STRIP, 0, 3);
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gl_state_bind_vertex_array(0);
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}
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void render_texture::free_data() {
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if (depth_texture) {
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texture_free(depth_texture);
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depth_texture = 0;
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}
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if (color_texture) {
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texture_free(color_texture);
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color_texture = 0;
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}
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if (rbo) {
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glDeleteRenderbuffers(1, &rbo);
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rbo = 0;
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}
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if (field_2C) {
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glDeleteRenderbuffers(1, &field_2C);
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field_2C = 0;
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}
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if (fbos[0]) {
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glDeleteFramebuffers(max_level + 1, fbos);
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memset(fbos, 0, sizeof(fbos));
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}
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max_level = 0;
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}
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int32_t render_texture::init(int32_t width, int32_t height,
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int32_t max_level, GLenum color_format, GLenum depth_format) {
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if (max_level < 0)
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return -1;
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max_level = min(max_level, 15);
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if (max_level < 0)
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return 0;
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free_data();
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GLuint color_texture;
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if (color_format) {
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this->color_texture = texture_load_tex_2d(texture_id(0x23, render_texture_counter),
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color_format, width, height, max_level, 0, 0);
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if (!this->color_texture)
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return -1;
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render_texture_counter++;
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color_texture = this->color_texture->tex;
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gl_state_bind_texture_2d(this->color_texture->tex);
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if (color_format == GL_RGBA32F) {
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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}
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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gl_state_bind_texture_2d(0);
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}
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else {
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this->color_texture = 0;
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color_texture = 0;
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}
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GLuint depth_texture;
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bool stencil;
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if (depth_format) {
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this->depth_texture = texture_load_tex_2d(texture_id(0x23, render_texture_counter),
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depth_format, width, height, 0, 0, 0);
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if (!this->depth_texture)
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return -1;
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render_texture_counter++;
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depth_texture = this->depth_texture->tex;
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stencil = depth_format == GL_DEPTH24_STENCIL8;
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}
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else {
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this->depth_texture = 0;
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depth_texture = 0;
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stencil = false;
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}
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this->max_level = max_level;
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if (render_texture_framebuffer_init(this, max_level) >= 0) {
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for (int32_t i = 0; i <= max_level; i++)
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if (render_texture_framebuffer_set_texture(this, color_texture, i, depth_texture, stencil) < 0)
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return -1;
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}
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return 0;
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}
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int32_t render_texture::set_color_depth_textures(GLuint color_texture,
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int32_t max_level, GLuint depth_texture, bool stencil) {
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int32_t error = 0;
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this->max_level = max_level;
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if (!fbos[0])
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error = render_texture_framebuffer_init(this, max_level);
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render_texture_framebuffer_set_texture(this, color_texture, max_level, depth_texture, stencil);
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return error;
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}
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void render_texture::draw_custom(shader_set_data* set) {
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gl_state_bind_vertex_array(render_texture_vao);
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set->draw_arrays(GL_TRIANGLE_STRIP, 0, 3);
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gl_state_bind_vertex_array(0);
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}
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void render_texture::draw_custom_glsl() {
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gl_state_bind_vertex_array(render_texture_vao);
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glDrawArrays(GL_TRIANGLE_STRIP, 0, 3);
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gl_state_bind_vertex_array(0);
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}
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void render_texture::draw_params(shader_set_data* set, int32_t width, int32_t height,
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float_t scale, float_t param_x, float_t param_y, float_t param_z, float_t param_w) {
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float_t w = (float_t)max(width, 1);
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float_t h = (float_t)max(height, 1);
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set->local_vert_set(0, scale / w, scale / h, w, h);
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set->local_frag_set(0, scale / w, scale / h, w, h);
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set->local_vert_set(3, param_x, param_y, param_z, param_w);
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set->local_frag_set(3, param_x, param_y, param_z, param_w);
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gl_state_bind_vertex_array(render_texture_vao);
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set->draw_arrays(GL_TRIANGLE_STRIP, 0, 3);
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gl_state_bind_vertex_array(0);
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}
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void render_texture::shader_set(shader_set_data* set, uint32_t index) {
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if (set && index)
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set->set(index);
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else
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render_texture_shader.use();
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}
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void render_texture::shader_set_glsl(shader_glsl* shader) {
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if (shader)
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shader->use();
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else
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render_texture_shader.use();
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}
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void render_texture_data_init() {
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if (!render_texture_data_initialized) {
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static const char* render_texture_vert_shader =
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"#version 430 core\n"
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"out VertexData {\n"
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" vec2 texcoord;\n"
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"} result;\n"
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"\n"
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"void main() {\n"
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" gl_Position.x = -1.0 + float(gl_VertexID / 2) * 4.0;\n"
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" gl_Position.y = 1.0 - float(gl_VertexID % 2) * 4.0;\n"
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" gl_Position.z = 0.0;\n"
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" gl_Position.w = 1.0;\n"
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" result.texcoord = gl_Position.xy * 0.5 + 0.5;\n"
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"}\n";
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static const char* render_texture_frag_shader =
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"#version 430 core\n"
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"layout(location = 0) out vec4 result;\n"
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"\n"
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"in VertexData {\n"
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" vec2 texcoord;\n"
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"} frg;\n"
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"\n"
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"layout(binding = 0) uniform sampler2D g_color;\n"
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"\n"
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"void main() {\n"
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" result = texture(g_color, frg.texcoord); \n"
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"}\n";
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shader_glsl_param param = {};
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param.name = "Render Texture";
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render_texture_shader.load(render_texture_vert_shader,
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render_texture_frag_shader, 0, ¶m);
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const float_t verts_quad[] = {
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-1.0f, 1.0f, 0.0f, 1.0f,
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-1.0f, -3.0f, 0.0f, -1.0f,
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3.0f, 1.0f, 2.0f, 1.0f,
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};
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glGenVertexArrays(1, &render_texture_vao);
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glGenBuffers(1, &render_texture_vbo);
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glBindBuffer(GL_ARRAY_BUFFER, render_texture_vbo);
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glBufferData(GL_ARRAY_BUFFER, sizeof(verts_quad), verts_quad, GL_STATIC_DRAW);
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gl_state_bind_vertex_array(render_texture_vao);
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 16, (void*)0); // Pos
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glVertexAttrib4f(3, 1.0f, 1.0f, 1.0f, 1.0f); // Color0
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glVertexAttrib4f(4, 1.0f, 1.0f, 1.0f, 1.0f); // Color1
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glEnableVertexAttribArray(8);
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glVertexAttribPointer(8, 2, GL_FLOAT, GL_FALSE, 16, (void*)8); // TexCoord0
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glEnableVertexAttribArray(9);
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glVertexAttribPointer(9, 2, GL_FLOAT, GL_FALSE, 16, (void*)8); // TexCoord1
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glEnableVertexAttribArray(10);
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glVertexAttribPointer(10, 2, GL_FLOAT, GL_FALSE, 16, (void*)8); // TexCoord2
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glEnableVertexAttribArray(11);
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glVertexAttribPointer(11, 2, GL_FLOAT, GL_FALSE, 16, (void*)8); // TexCoord3
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glEnableVertexAttribArray(12);
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glVertexAttribPointer(12, 2, GL_FLOAT, GL_FALSE, 16, (void*)8); // TexCoord4
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glEnableVertexAttribArray(13);
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glVertexAttribPointer(13, 2, GL_FLOAT, GL_FALSE, 16, (void*)8); // TexCoord5
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glEnableVertexAttribArray(14);
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glVertexAttribPointer(14, 2, GL_FLOAT, GL_FALSE, 16, (void*)8); // TexCoord6
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glEnableVertexAttribArray(15);
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glVertexAttribPointer(15, 2, GL_FLOAT, GL_FALSE, 16, (void*)8); // TexCoord7
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gl_state_bind_vertex_array(0);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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render_texture_data_initialized = true;
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}
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}
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void render_texture_data_free() {
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render_texture_shader.unload();
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glDeleteBuffers(1, &render_texture_vbo);
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glDeleteVertexArrays(1, &render_texture_vao);
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render_texture_data_initialized = false;
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}
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static int32_t render_texture_framebuffer_init(render_texture* rt, int32_t max_level) {
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glGenFramebuffers(max_level + 1, rt->fbos);
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return -(glGetError() != GL_ZERO);
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}
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static int32_t render_texture_framebuffer_set_texture(render_texture* rt,
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GLuint color_texture, int32_t level, GLuint depth_texture, bool stencil) {
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if (level < 0 || level > rt->max_level)
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return -1;
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glBindFramebuffer(GL_FRAMEBUFFER, rt->fbos[level]);
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glGetError();
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if (color_texture) {
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glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, color_texture, level);
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glGetError();
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glDrawBuffer(GL_COLOR_ATTACHMENT0);
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glReadBuffer(GL_COLOR_ATTACHMENT0);
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}
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else {
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glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, 0, 0);
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glGetError();
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glDrawBuffer(GL_ZERO);
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glReadBuffer(GL_ZERO);
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}
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glGetError();
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if (level == 0) {
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if (stencil) {
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if (depth_texture)
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glFramebufferTexture(GL_FRAMEBUFFER,
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GL_DEPTH_STENCIL_ATTACHMENT, depth_texture, 0);
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else if (rt->rbo) {
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glBindRenderbuffer(GL_RENDERBUFFER, rt->rbo);
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glFramebufferRenderbuffer(GL_FRAMEBUFFER,
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GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, rt->rbo);
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}
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else
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glFramebufferTexture(GL_FRAMEBUFFER,
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GL_DEPTH_STENCIL_ATTACHMENT, 0, 0);
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}
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else {
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if (depth_texture)
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glFramebufferTexture(GL_FRAMEBUFFER,
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GL_DEPTH_ATTACHMENT, depth_texture, 0);
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else if (rt->rbo) {
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glBindRenderbuffer(GL_RENDERBUFFER, rt->rbo);
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glFramebufferRenderbuffer(GL_FRAMEBUFFER,
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GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rt->rbo);
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}
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else
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glFramebufferTexture(GL_FRAMEBUFFER,
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GL_DEPTH_ATTACHMENT, 0, 0);
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}
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glGetError();
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}
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int32_t ret = 0;
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if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
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ret = -1;
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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glGetError();
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return ret;
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}
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