Rearrange texture bind calls to keep them closer to where they're needed

[libs/gl.git] / source / texture.cpp

diff --git a/source/texture.cpp b/source/texture.cpp
index a23e57c72615ed632e67c863e9ed37539842dcd2..fe27a04d9ddd830fa93f21d51052ec0ffc0da8cd 100644 (file)
--- a/source/texture.cpp
+++ b/source/texture.cpp
@@ -1,5 +1,9 @@
+#include <msp/gl/extensions/arb_shadow.h>
+#include <msp/gl/extensions/ext_framebuffer_object.h>
+#include <msp/gl/extensions/ext_texture3d.h>
 #include <msp/gl/extensions/ext_texture_filter_anisotropic.h>
 #include <msp/gl/extensions/sgis_generate_mipmap.h>
+#include <msp/io/memory.h>
 #include <msp/strings/format.h>
 #include "error.h"
 #include "resourcemanager.h"
@@ -65,10 +69,18 @@ Texture::Texture(GLenum t, ResourceManager *m):
 
 Texture::~Texture()
 {
+       while(TexUnit *unit = TexUnit::find_unit(this))
+               unbind_from(unit->get_index());
+
        if(id)
                glDeleteTextures(1, &id);
 }
 
+DataType Texture::get_alloc_type(PixelFormat fmt)
+{
+       return (get_base_pixelformat(fmt)==DEPTH_COMPONENT ? UNSIGNED_SHORT : UNSIGNED_BYTE);
+}
+
 void Texture::update_parameter(int mask) const
 {
        if(TexUnit::current().get_texture()!=this)
@@ -96,7 +108,7 @@ void Texture::update_parameter(int mask) const
        if(mask&WRAP_R)
                glTexParameteri(target, GL_TEXTURE_WRAP_R, wrap_r);
        if(mask&GENERATE_MIPMAP)
-               glTexParameteri(target, GL_GENERATE_MIPMAP_SGIS, gen_mipmap);
+               glTexParameteri(target, GL_GENERATE_MIPMAP, gen_mipmap);
        if(mask&COMPARE)
                glTexParameteri(target, GL_TEXTURE_COMPARE_MODE, (compare ? GL_COMPARE_R_TO_TEXTURE : GL_NONE));
        if(mask&COMPARE_FUNC)
@@ -135,7 +147,8 @@ void Texture::set_wrap(TextureWrap w)
 {
        set_wrap_s(w);
        set_wrap_t(w);
-       set_wrap_r(w);
+       if(EXT_texture3D)
+               set_wrap_r(w);
 }
 
 void Texture::set_wrap_s(TextureWrap w)
@@ -152,44 +165,78 @@ void Texture::set_wrap_t(TextureWrap w)
 
 void Texture::set_wrap_r(TextureWrap w)
 {
+       static Require _req(EXT_texture3D);
        wrap_r = w;
        update_parameter(WRAP_R);
 }
 
 void Texture::set_generate_mipmap(bool gm)
 {
-       if(gm)
+       if(gm && !EXT_framebuffer_object)
                static Require _req(SGIS_generate_mipmap);
        gen_mipmap = gm;
-       update_parameter(GENERATE_MIPMAP);
+       if(!EXT_framebuffer_object)
+               update_parameter(GENERATE_MIPMAP);
+}
+
+void Texture::auto_generate_mipmap()
+{
+       // glGenerateMipmap is defined here
+       if(EXT_framebuffer_object)
+               glGenerateMipmap(target);
 }
 
 void Texture::set_compare_enabled(bool c)
 {
+       if(c)
+               static Require _req(ARB_shadow);
        compare = c;
        update_parameter(COMPARE);
 }
 
 void Texture::set_compare_func(Predicate f)
 {
+       static Require _req(ARB_shadow);
        cmp_func = f;
        update_parameter(COMPARE_FUNC);
 }
 
+void Texture::load_image(const string &fn, bool srgb)
+{
+       Graphics::Image img;
+       img.load_file(fn);
+
+       image(img, srgb);
+}
+
 void Texture::bind_to(unsigned i) const
 {
        if(!id)
-               manager->load_resource(*this);
+       {
+               if(manager)
+                       manager->resource_used(*this);
+               if(!id)
+               {
+                       unbind_from(i);
+                       return;
+               }
+       }
 
        TexUnit &unit = TexUnit::get_unit(i);
-       const Texture *cur = unit.get_texture();
+       const Texture *old = unit.get_texture();
        if(unit.set_texture(this))
        {
+               if(manager)
+                       manager->resource_used(*this);
+
                unit.bind();
-               if(cur && cur->target!=target)
-                       glDisable(cur->target);
-               if(!cur || cur->target!=target)
-                       glEnable(target);
+               if(unit.supports_legacy())
+               {
+                       if(old && old->target!=target)
+                               glDisable(old->target);
+                       if(!old || old->target!=target)
+                               glEnable(target);
+               }
                glBindTexture(target, id);
 
                if(dirty_params)
@@ -213,7 +260,8 @@ void Texture::unbind_from(unsigned i)
        {
                unit.bind();
                glBindTexture(cur->target, 0);
-               glDisable(cur->target);
+               if(unit.supports_legacy())
+                       glDisable(cur->target);
        }
 }
 
@@ -237,10 +285,12 @@ void Texture::Loader::init()
        else
                srgb = false;
 
+       add("external_image", &Loader::external_image);
        add("filter", &Loader::filter);
-       add("max_anisotropy", &Loader::max_anisotropy);
        add("generate_mipmap", &Loader::generate_mipmap);
+       add("image_data", &Loader::image_data);
        add("mag_filter", &Loader::mag_filter);
+       add("max_anisotropy", &Loader::max_anisotropy);
        add("min_filter", &Loader::min_filter);
        add("wrap",       &Loader::wrap);
        add("wrap_r",     &Loader::wrap_r);
@@ -248,6 +298,15 @@ void Texture::Loader::init()
        add("wrap_t",     &Loader::wrap_t);
 }
 
+void Texture::Loader::external_image(const string &fn)
+{
+       Graphics::Image img;
+       RefPtr<IO::Seekable> io = get_collection().open_raw(fn);
+       img.load_io(*io);
+
+       obj.image(img, srgb);
+}
+
 void Texture::Loader::filter(TextureFilter f)
 {
        obj.set_filter(f);
@@ -258,6 +317,15 @@ void Texture::Loader::generate_mipmap(bool gm)
        obj.set_generate_mipmap(gm);
 }
 
+void Texture::Loader::image_data(const string &data)
+{
+       Graphics::Image img;
+       IO::Memory mem(data.data(), data.size());
+       img.load_io(mem);
+
+       obj.image(img, srgb);
+}
+
 void Texture::Loader::mag_filter(TextureFilter f)
 {
        obj.set_mag_filter(f);
@@ -293,5 +361,12 @@ void Texture::Loader::wrap_t(TextureWrap w)
        obj.set_wrap_t(w);
 }
 
+
+bool is_mipmapped(TextureFilter filter)
+{
+       return (filter==NEAREST_MIPMAP_NEAREST || filter==NEAREST_MIPMAP_LINEAR ||
+               filter==LINEAR_MIPMAP_NEAREST || filter==LINEAR_MIPMAP_LINEAR);
+}
+
 } // namespace GL
 } // namespace Msp