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Diffstat (limited to 'src/platform/opengl/opengl_texture.cpp')
-rw-r--r--src/platform/opengl/opengl_texture.cpp272
1 files changed, 0 insertions, 272 deletions
diff --git a/src/platform/opengl/opengl_texture.cpp b/src/platform/opengl/opengl_texture.cpp
deleted file mode 100644
index 6bcb9cd..0000000
--- a/src/platform/opengl/opengl_texture.cpp
+++ /dev/null
@@ -1,272 +0,0 @@
-#include "opengl_texture.h"
-
-#include "rendering/shader.h"
-
-#define STB_IMAGE_IMPLEMENTATION
-#include "stb_image.h"
-#include <glm/glm.hpp>
-#include <glm/gtc/matrix_transform.hpp>
-#include <glm/gtc/type_ptr.hpp>
-
-// NOTE: This file targets OpenGL 4.1 (the maximum macOS exposes). It uses the
-// classic bind-based texture API rather than 4.5 Direct State Access
-// (glCreateTextures / glTextureStorage2D / glTextureParameteri / glBindTextureUnit),
-// none of which exist on macOS.
-
-namespace Donut
-{
- OpenGLTexture2D::OpenGLTexture2D(uint32_t width, uint32_t height)
- : m_width(width), m_height(height)
- {
- m_internal_format = GL_RGBA8;
- m_data_format = GL_RGBA;
-
- glGenTextures(1, &m_renderer_id);
- glBindTexture(GL_TEXTURE_2D, m_renderer_id);
- glTexImage2D(GL_TEXTURE_2D, 0, m_internal_format, m_width, m_height, 0, m_data_format, GL_UNSIGNED_BYTE, nullptr);
-
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
- }
-
- OpenGLTexture2D::OpenGLTexture2D(const std::string& path)
- : m_path(path)
- {
- m_width = 1;
- m_height = 1;
- m_internal_format = GL_RGBA8;
- m_data_format = GL_RGBA;
-
- glGenTextures(1, &m_renderer_id);
- glBindTexture(GL_TEXTURE_2D, m_renderer_id);
- glTexImage2D(GL_TEXTURE_2D, 0, m_internal_format, m_width, m_height, 0, m_data_format, GL_UNSIGNED_BYTE, nullptr);
-
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
-
- uint32_t white_pixel = 0xFFFFFFFF;
- glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, m_width, m_height, m_data_format, GL_UNSIGNED_BYTE, &white_pixel);
-
- DONUT_INFO("Created default texture (stb_image not available for loading: ", path, ")");
- }
-
- OpenGLTexture2D::~OpenGLTexture2D()
- {
- glDeleteTextures(1, &m_renderer_id);
- }
-
- auto OpenGLTexture2D::set_data(void* data, uint32_t size) -> void
- {
- uint32_t bpp = m_data_format == GL_RGBA ? 4 : 3;
- if (size != m_width * m_height * bpp)
- {
- DONUT_ERROR("Data must be entire texture!");
- return;
- }
-
- glBindTexture(GL_TEXTURE_2D, m_renderer_id);
- glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, m_width, m_height, m_data_format, GL_UNSIGNED_BYTE, data);
- }
-
- auto OpenGLTexture2D::bind(uint32_t slot) const -> void
- {
- glActiveTexture(GL_TEXTURE0 + slot);
- glBindTexture(GL_TEXTURE_2D, m_renderer_id);
- }
-
- auto OpenGLTexture2D::bind_as_image(uint32_t slot, bool read_only) const -> void
- {
- // Image load/store is OpenGL 4.2 and unavailable on macOS. Guard the
- // function pointer so this degrades to a no-op instead of crashing.
- if (glBindImageTexture == nullptr)
- return;
- GLenum access = read_only ? GL_READ_ONLY : GL_WRITE_ONLY;
- glBindImageTexture(slot, m_renderer_id, 0, GL_FALSE, 0, access, m_internal_format);
- }
-
- OpenGLCubemapTexture::OpenGLCubemapTexture(uint32_t width, uint32_t height)
- : m_width(width), m_height(height)
- {
- m_internal_format = GL_RGBA16F;
- m_data_format = GL_RGBA;
-
- glGenTextures(1, &m_renderer_id);
- glBindTexture(GL_TEXTURE_CUBE_MAP, m_renderer_id);
- for (uint32_t i = 0; i < 6; ++i)
- glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, m_internal_format, m_width, m_height, 0, m_data_format, GL_FLOAT, nullptr);
-
- glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
- glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
- glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
- }
-
- OpenGLCubemapTexture::OpenGLCubemapTexture(const std::string& path)
- : m_path(path)
- {
- m_width = 1024;
- m_height = 1024;
- m_internal_format = GL_RGBA16F;
- m_data_format = GL_RGBA;
-
- glGenTextures(1, &m_renderer_id);
- glBindTexture(GL_TEXTURE_CUBE_MAP, m_renderer_id);
- for (uint32_t i = 0; i < 6; ++i)
- glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, m_internal_format, m_width, m_height, 0, m_data_format, GL_FLOAT, nullptr);
-
- glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
- glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
- glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
-
- LoadHDRI(path);
- }
-
- OpenGLCubemapTexture::~OpenGLCubemapTexture()
- {
- glDeleteTextures(1, &m_renderer_id);
- }
-
- auto OpenGLCubemapTexture::LoadHDRI(const std::string& path) -> void
- {
- stbi_set_flip_vertically_on_load(true);
- int width, height, channels;
- float* hdr_data = stbi_loadf(path.c_str(), &width, &height, &channels, 3);
-
- if (!hdr_data)
- {
- DONUT_ERROR("Failed to load HDRI: {}", path);
- float default_sky[6 * 4] =
- {
- 0.5f, 0.7f, 1.0f, 1.0f, // Right
- 0.5f, 0.7f, 1.0f, 1.0f, // Left
- 0.5f, 0.7f, 1.0f, 1.0f, // Top
- 0.5f, 0.7f, 1.0f, 1.0f, // Bottom
- 0.5f, 0.7f, 1.0f, 1.0f, // Front
- 0.5f, 0.7f, 1.0f, 1.0f // Back
- };
-
- glBindTexture(GL_TEXTURE_CUBE_MAP, m_renderer_id);
- for (int i = 0; i < 6; ++i)
- glTexSubImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, 0, 0, 1, 1, GL_RGBA, GL_FLOAT, &default_sky[i * 4]);
- return;
- }
-
- convert_equirectangular_to_cubemap(hdr_data, width, height);
- stbi_image_free(hdr_data);
-
- DONUT_INFO("Successfully loaded HDRI: {} ({}x{})", path, width, height);
- }
-
- auto OpenGLCubemapTexture::convert_equirectangular_to_cubemap(float* hdr_data, int width, int height) -> void
- {
- uint32_t capture_fbo, capture_rbo;
- glGenFramebuffers(1, &capture_fbo);
- glGenRenderbuffers(1, &capture_rbo);
-
- glBindFramebuffer(GL_FRAMEBUFFER, capture_fbo);
- glBindRenderbuffer(GL_RENDERBUFFER, capture_rbo);
- glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, m_width, m_height);
- glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, capture_rbo);
-
- uint32_t hdr_texture;
- glGenTextures(1, &hdr_texture);
- glBindTexture(GL_TEXTURE_2D, hdr_texture);
- glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F, width, height, 0, GL_RGB, GL_FLOAT, hdr_data);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-
- auto equirect_shader = Shader::create("assets/shaders/EquirectToCubemap.glsl");
- if (!equirect_shader)
- {
- DONUT_ERROR("Failed to create equirectangular to cubemap shader");
- return;
- }
-
- uint32_t shader_program = equirect_shader->get_renderer_id();
-
- float vertices[] =
- {
- -1.0f, 1.0f, -1.0f, -1.0f, -1.0f, -1.0f, 1.0f, -1.0f, -1.0f, 1.0f, -1.0f, -1.0f, 1.0f, 1.0f, -1.0f, -1.0f, 1.0f, -1.0f,
- -1.0f, -1.0f, 1.0f, -1.0f, -1.0f, -1.0f, -1.0f, 1.0f, -1.0f, -1.0f, 1.0f, -1.0f, -1.0f, 1.0f, 1.0f, -1.0f, -1.0f, 1.0f,
- 1.0f, -1.0f, -1.0f, 1.0f, -1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, -1.0f, 1.0f, -1.0f, -1.0f,
- -1.0f, -1.0f, 1.0f, -1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, -1.0f, 1.0f, -1.0f, -1.0f, 1.0f,
- -1.0f, 1.0f, -1.0f, 1.0f, 1.0f, -1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, -1.0f, 1.0f, 1.0f, -1.0f, 1.0f, -1.0f,
- -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, 1.0f, 1.0f, -1.0f, -1.0f, 1.0f, -1.0f, -1.0f, 1.0f, -1.0f, 1.0f, -1.0f, -1.0f, 1.0f
- };
-
- uint32_t cube_vao, cube_vbo;
- glGenVertexArrays(1, &cube_vao);
- glGenBuffers(1, &cube_vbo);
- glBindVertexArray(cube_vao);
- glBindBuffer(GL_ARRAY_BUFFER, cube_vbo);
- glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
- glEnableVertexAttribArray(0);
- glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);
-
- glm::mat4 capture_projection = glm::perspective(glm::radians(90.0f), 1.0f, 0.1f, 10.0f);
- glm::mat4 capture_views[] =
- {
- glm::lookAt(glm::vec3(0.0f, 0.0f, 0.0f), glm::vec3( 1.0f, 0.0f, 0.0f), glm::vec3(0.0f, -1.0f, 0.0f)),
- glm::lookAt(glm::vec3(0.0f, 0.0f, 0.0f), glm::vec3(-1.0f, 0.0f, 0.0f), glm::vec3(0.0f, -1.0f, 0.0f)),
- glm::lookAt(glm::vec3(0.0f, 0.0f, 0.0f), glm::vec3( 0.0f, 1.0f, 0.0f), glm::vec3(0.0f, 0.0f, 1.0f)),
- glm::lookAt(glm::vec3(0.0f, 0.0f, 0.0f), glm::vec3( 0.0f, -1.0f, 0.0f), glm::vec3(0.0f, 0.0f, -1.0f)),
- glm::lookAt(glm::vec3(0.0f, 0.0f, 0.0f), glm::vec3( 0.0f, 0.0f, 1.0f), glm::vec3(0.0f, -1.0f, 0.0f)),
- glm::lookAt(glm::vec3(0.0f, 0.0f, 0.0f), glm::vec3( 0.0f, 0.0f, -1.0f), glm::vec3(0.0f, -1.0f, 0.0f))
- };
-
- glUseProgram(shader_program);
- glUniform1i(glGetUniformLocation(shader_program, "u_EquirectangularMap"), 0);
- // EquirectToCubemap is authored in Slang (row-major); transpose glm's
- // column-major matrices on upload (GL_TRUE) to match.
- glUniformMatrix4fv(glGetUniformLocation(shader_program, "u_Projection"), 1, GL_TRUE, &capture_projection[0][0]);
- glActiveTexture(GL_TEXTURE0);
- glBindTexture(GL_TEXTURE_2D, hdr_texture);
-
- glViewport(0, 0, m_width, m_height);
- glBindFramebuffer(GL_FRAMEBUFFER, capture_fbo);
- for (unsigned int i = 0; i < 6; ++i)
- {
- glUniformMatrix4fv(glGetUniformLocation(shader_program, "u_View"), 1, GL_TRUE, &capture_views[i][0][0]);
- glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, m_renderer_id, 0);
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
- glBindVertexArray(cube_vao);
- glDrawArrays(GL_TRIANGLES, 0, 36);
- }
- glBindVertexArray(0);
- glBindFramebuffer(GL_FRAMEBUFFER, 0);
-
- glDeleteVertexArrays(1, &cube_vao);
- glDeleteBuffers(1, &cube_vbo);
- glDeleteTextures(1, &hdr_texture);
- glDeleteFramebuffers(1, &capture_fbo);
- glDeleteRenderbuffers(1, &capture_rbo);
- }
-
- auto OpenGLCubemapTexture::set_data(void* data, uint32_t size) -> void
- {
- DONUT_WARN("set_data not implemented for cubemaps");
- }
-
- auto OpenGLCubemapTexture::bind(uint32_t slot) const -> void
- {
- glActiveTexture(GL_TEXTURE0 + slot);
- glBindTexture(GL_TEXTURE_CUBE_MAP, m_renderer_id);
- }
-
- auto OpenGLCubemapTexture::bind_as_image(uint32_t slot, bool read_only) const -> void
- {
- if (glBindImageTexture == nullptr)
- return;
- GLenum access = read_only ? GL_READ_ONLY : GL_WRITE_ONLY;
- glBindImageTexture(slot, m_renderer_id, 0, GL_TRUE, 0, access, m_internal_format);
- }
-};