[client] egl: replace monolithic EGLTexture with modular version

The way things were handled in EGLTexture is not only very hard to
follow, but broken. This change set breaks up EGLTexture into a modular
design making it easier to implement the various versions.

Note that DMABUF is currently broken and needs to be re-implemented.

client/renderers/EGL/texture.h

@@ -24,34 +24,121 @@
 #include "shader.h"
 #include "common/framebuffer.h"
 
+#include "util.h"
+
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
 
-typedef struct EGL_Texture EGL_Texture;
+struct EGL_TextureOps;
 
-enum EGL_PixelFormat
+typedef struct EGL_Texture
+{
+  const struct EGL_TextureOps * ops;
+
+  // needed for dmabuf
+  size_t size;
+}
+EGL_Texture;
+
+typedef enum EGL_TexType
+{
+  EGL_TEXTYPE_BUFFER,
+  EGL_TEXTYPE_FRAMEBUFFER,
+  EGL_TEXTYPE_DMABUF
+}
+EGL_TexType;
+
+typedef enum EGL_PixelFormat
 {
   EGL_PF_RGBA,
   EGL_PF_BGRA,
   EGL_PF_RGBA10,
-  EGL_PF_RGBA16F,
-  EGL_PF_YUV420
-};
+  EGL_PF_RGBA16F
+}
+EGL_PixelFormat;
 
-enum EGL_TexStatus
+typedef enum EGL_TexStatus
 {
   EGL_TEX_STATUS_NOTREADY,
   EGL_TEX_STATUS_OK,
   EGL_TEX_STATUS_ERROR
-};
+}
+EGL_TexStatus;
 
-bool egl_texture_init(EGL_Texture ** texture, EGLDisplay * display);
+typedef struct EGL_TexSetup
+{
+  /* the pixel format of the texture */
+  EGL_PixelFormat pixFmt;
+
+  /* the width of the texture in pixels */
+  size_t width;
+
+  /* the height of the texture in pixels */
+  size_t height;
+
+  /* the stide of the texture in bytes */
+  size_t stride;
+}
+EGL_TexSetup;
+
+typedef struct EGL_TexUpdate
+{
+  /* the type of this update */
+  EGL_TexType type;
+
+  union
+  {
+    /* EGL_TEXTURE_BUFFER */
+    const uint8_t * buffer;
+
+    /* EGL_TEXTURE_FRAMEBUFFER */
+    const FrameBuffer * frame;
+
+    /* EGL_TEXTURE_DMABUF */
+    int dmaFD;
+  };
+}
+EGL_TexUpdate;
+
+typedef struct EGL_TextureOps
+{
+  /* allocate & initialize an EGL_Texture */
+  bool (*init)(EGL_Texture ** texture, EGLDisplay * display);
+
+  /* free the EGL_Texture */
+  void (*free)(EGL_Texture * texture);
+
+  /* setup/reconfigure the texture format */
+  bool (*setup)(EGL_Texture * texture, const EGL_TexSetup * setup);
+
+  /* update the texture  */
+  bool (*update)(EGL_Texture * texture, const EGL_TexUpdate * update);
+
+  /* called from a background job to prepare the texture for use before bind */
+  enum EGL_TexStatus (*process)(EGL_Texture * texture);
+
+  /* bind the texture for use */
+  enum EGL_TexStatus (*bind)(EGL_Texture * texture);
+}
+EGL_TextureOps;
+
+bool egl_texture_init(EGL_Texture ** texture, EGLDisplay * display,
+    EGL_TexType type, bool streaming);
 void egl_texture_free(EGL_Texture ** tex);
 
-bool               egl_texture_setup  (EGL_Texture * texture, enum EGL_PixelFormat pixfmt, size_t width, size_t height, size_t stride, bool streaming, bool useDMA);
-bool               egl_texture_update (EGL_Texture * texture, const uint8_t * buffer);
-bool               egl_texture_update_from_frame(EGL_Texture * texture, const FrameBuffer * frame);
-bool               egl_texture_update_from_dma  (EGL_Texture * texture, const FrameBuffer * frmame, const int dmaFd);
+bool egl_texture_setup(EGL_Texture * texture, enum EGL_PixelFormat pixFmt,
+    size_t width, size_t height, size_t stride);
+
+bool egl_texture_update (EGL_Texture * texture, const uint8_t * buffer);
+
+bool egl_texture_update_from_frame(EGL_Texture * texture,
+    const FrameBuffer * frame);
+
+bool egl_texture_update_from_dma(EGL_Texture * texture,
+    const FrameBuffer * frame, const int dmaFd);
+
 enum EGL_TexStatus egl_texture_process(EGL_Texture * texture);
-enum EGL_TexStatus egl_texture_bind          (EGL_Texture * texture);
-int                egl_texture_count         (EGL_Texture * texture);
+
+enum EGL_TexStatus egl_texture_bind(EGL_Texture * texture);
+
+int egl_texture_count(EGL_Texture * texture);