wip

2022-04-24 22:12:07 +02:00
parent 40a1723544
commit 3cfdd7a3f2
43 changed files with 777 additions and 457 deletions
--- a/src/resources/CubeMap.cpp
+++ b/src/resources/CubeMap.cpp
@@ -0,0 +1,119 @@
+#include "CubeMap.h"
+#include "../ShaderProgram.h"
+#include "../util/Log.h"
+
+#include <glad/glad.h>
+
+TextureCubeMap::TextureCubeMap(const TextureCubeMapDescriptor &descriptor) : AbstractCubeMap(descriptor.path)
+{
+    // Reserve space in vector so that elements can be accessed explicitly.
+    m_textureBuffers.resize(static_cast<int>(CubeMapFace::CUBEMAP_FACES_NUM_ITEMS));
+
+    stbi_set_flip_vertically_on_load(0);
+
+    glGenTextures(1, &m_glId);
+    glBindTexture(GL_TEXTURE_CUBE_MAP, m_glId);
+
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_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);
+
+    int i = 0;
+    for (const auto &faceName : FACE_NAMES) {
+        std::string texturePath = descriptor.path + faceName;
+
+        auto textureBuffer = stbi_load(texturePath.c_str(), &m_textureWidth, &m_textureHeight, &m_numComponents, 0);
+
+        if (!textureBuffer) {
+            Log::logger().warn("CubeMap texture {} could not be loaded", texturePath);
+            return;
+        }
+
+        m_textureBuffers[i] = textureBuffer;
+        i++;
+    }
+
+    glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
+}
+
+void TextureCubeMap::initialize()
+{
+    m_initialized = true;
+
+    glGenTextures(1, &m_glId);
+    glBindTexture(GL_TEXTURE_CUBE_MAP, m_glId);
+
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_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);
+
+    int i = 0;
+    for (auto &textureBuffer : m_textureBuffers) {
+        GLenum internalFormat;
+        GLenum dataFormat;
+
+        switch (m_numComponents) {
+        case 1:
+            internalFormat = GL_RED;
+            dataFormat = GL_RED;
+            break;
+        case 3:
+            internalFormat = GL_SRGB8;
+            dataFormat = GL_RGB;
+            break;
+        case 4:
+            internalFormat = GL_SRGB8_ALPHA8;
+            dataFormat = GL_RGBA;
+            break;
+        }
+
+        glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, internalFormat, m_textureWidth, m_textureHeight, 0,
+                     dataFormat, GL_UNSIGNED_BYTE, textureBuffer);
+
+        stbi_image_free(textureBuffer);
+        i++;
+    }
+
+    glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
+}
+
+void AbstractCubeMap::bind(ShaderProgram *shaderProgram) const
+{
+    std::string uniformName = "u_skybox";
+
+    shaderProgram->setUniform(uniformName, 0);
+    glActiveTexture(GL_TEXTURE0);
+    glBindTexture(GL_TEXTURE_CUBE_MAP, m_glId);
+}
+
+void AbstractCubeMap::unbind() const
+{
+    glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
+}
+
+InternalCubeMap::InternalCubeMap(unsigned int resolution) : AbstractCubeMap("internal")
+{
+    m_textureWidth = resolution;
+    m_textureHeight = resolution;
+    m_initialized = true;
+
+    glGenTextures(1, &m_glId);
+    glBindTexture(GL_TEXTURE_CUBE_MAP, m_glId);
+
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    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);
+
+    for (unsigned int i = 0; i < static_cast<int>(CubeMapFace::CUBEMAP_FACES_NUM_ITEMS); i++) {
+        glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_DEPTH_COMPONENT24, resolution, resolution, 0,
+                     GL_DEPTH_COMPONENT, GL_FLOAT, NULL);
+    }
+
+    glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
+}