diff options
Diffstat (limited to 'gfx/models/texture.cpp')
| -rw-r--r-- | gfx/models/texture.cpp | 95 |
1 files changed, 79 insertions, 16 deletions
diff --git a/gfx/models/texture.cpp b/gfx/models/texture.cpp index efc76e1..e014f80 100644 --- a/gfx/models/texture.cpp +++ b/gfx/models/texture.cpp @@ -1,5 +1,6 @@ #include "texture.h"
#include "glArrays.h"
+#include "tga.h"
#include <GL/glew.h>
#include <cache.h>
#include <fcntl.h>
@@ -12,6 +13,21 @@ Cache<Texture, std::filesystem::path> Texture::cachedTexture;
+GLint
+TextureOptions::glMapMode(TextureOptions::MapMode mm)
+{
+ switch (mm) {
+ case MapMode::Repeat:
+ return GL_REPEAT;
+ case MapMode::Clamp:
+ return GL_CLAMP_TO_EDGE;
+ case MapMode::Mirror:
+ return GL_MIRRORED_REPEAT;
+ default:
+ throw std::domain_error("Invalid MapMode value");
+ }
+}
+
Texture::Texture(const std::filesystem::path & fileName, TextureOptions to) :
Texture {Image {Resource::mapPath(fileName).c_str(), STBI_rgb_alpha}, to}
{
@@ -29,8 +45,8 @@ Texture::Texture(GLsizei width, GLsizei height, const void * data, TextureOption glBindTexture(type, m_texture);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- glTexParameteri(type, GL_TEXTURE_WRAP_S, to.wrap);
- glTexParameteri(type, GL_TEXTURE_WRAP_T, to.wrap);
+ glTexParameteri(type, GL_TEXTURE_WRAP_S, TextureOptions::glMapMode(to.wrapU));
+ glTexParameteri(type, GL_TEXTURE_WRAP_T, TextureOptions::glMapMode(to.wrapV));
glTexParameteri(type, GL_TEXTURE_MIN_FILTER, to.minFilter);
glTexParameteri(type, GL_TEXTURE_MAG_FILTER, to.magFilter);
@@ -44,44 +60,91 @@ Texture::bind(GLenum unit) const glBindTexture(type, m_texture);
}
-void
-Texture::save(const glTexture & texture, GLenum format, GLenum type, const glm::ivec2 & size, unsigned short channels,
- const char * path, short tgaFormat)
+glm::ivec2
+Texture::getSize(const glTexture & texture)
{
- using TGAHead = std::array<short, 9>;
+ glm::ivec2 size;
+ glGetTextureLevelParameteriv(texture, 0, GL_TEXTURE_WIDTH, &size.x);
+ glGetTextureLevelParameteriv(texture, 0, GL_TEXTURE_HEIGHT, &size.y);
+ return size;
+}
+void
+Texture::save(
+ const glTexture & texture, GLenum format, GLenum type, uint8_t channels, const char * path, uint8_t tgaFormat)
+{
+ const auto size = getSize(texture);
const size_t dataSize = (static_cast<size_t>(size.x * size.y * channels));
const size_t fileSize = dataSize + sizeof(TGAHead);
filesystem::fh out {path, O_RDWR | O_CREAT, 0660};
out.truncate(fileSize);
auto tga = out.mmap(fileSize, 0, PROT_WRITE, MAP_SHARED);
- *tga.get<TGAHead>() = {0, tgaFormat, 0, 0, 0, 0, static_cast<short>(size.x), static_cast<short>(size.y),
- static_cast<short>(8 * channels)};
+ *tga.get<TGAHead>() = {
+ .format = tgaFormat,
+ .size = size,
+ .pixelDepth = static_cast<uint8_t>(8 * channels),
+ };
+ glPixelStorei(GL_PACK_ALIGNMENT, 1);
glGetTextureImage(texture, 0, format, type, static_cast<GLsizei>(dataSize), tga.get<TGAHead>() + 1);
tga.msync(MS_ASYNC);
}
void
-Texture::save(const glm::ivec2 & size, const char * path) const
+Texture::save(const char * path) const
{
- save(m_texture, GL_BGR, GL_UNSIGNED_BYTE, size, 3, path, 2);
+ save(m_texture, GL_BGR, GL_UNSIGNED_BYTE, 3, path, 2);
}
void
-Texture::save(const glTexture & texture, const glm::ivec2 & size, const char * path)
+Texture::save(const glTexture & texture, const char * path)
{
- save(texture, GL_BGR, GL_UNSIGNED_BYTE, size, 3, path, 2);
+ save(texture, GL_BGR, GL_UNSIGNED_BYTE, 3, path, 2);
}
void
-Texture::saveDepth(const glTexture & texture, const glm::ivec2 & size, const char * path)
+Texture::saveDepth(const glTexture & texture, const char * path)
{
- save(texture, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, size, 1, path, 3);
+ save(texture, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, 1, path, 3);
}
void
-Texture::saveNormal(const glTexture & texture, const glm::ivec2 & size, const char * path)
+Texture::saveNormal(const glTexture & texture, const char * path)
+{
+ save(texture, GL_BGR, GL_BYTE, 3, path, 2);
+}
+
+TextureAtlas::TextureAtlas(GLsizei width, GLsizei height, GLuint count) : Texture(width, height, nullptr, {})
+{
+ glBindTexture(GL_TEXTURE_RECTANGLE, m_atlas);
+
+ glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+ glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexImage2D(GL_TEXTURE_RECTANGLE, 0, GL_RGBA16UI, 2, static_cast<GLsizei>(count), 0, GL_RGBA_INTEGER,
+ GL_UNSIGNED_BYTE, nullptr);
+}
+
+void
+TextureAtlas::bind(GLenum unit) const
+{
+ Texture::bind(unit);
+ glActiveTexture(unit + 1);
+ glBindTexture(GL_TEXTURE_RECTANGLE, m_atlas);
+}
+
+GLuint
+TextureAtlas::add(glm::ivec2 position, glm::ivec2 size, void * data, TextureOptions to)
{
- save(texture, GL_BGR, GL_BYTE, size, 3, path, 2);
+ glTextureSubImage2D(m_texture, 0, position.x, position.y, size.x, size.y, GL_RGBA, GL_UNSIGNED_BYTE, data);
+ struct Material {
+ glm::vec<2, uint16_t> position, size;
+ TextureOptions::MapMode wrapU;
+ TextureOptions::MapMode wrapV;
+ } material {position, size, to.wrapU, to.wrapV};
+ static_assert(sizeof(Material) <= 32);
+ glTextureSubImage2D(m_atlas, 0, 0, static_cast<GLsizei>(used), 2, 1, GL_RGBA_INTEGER, GL_UNSIGNED_SHORT, &material);
+ return ++used;
}
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