GLView: Add more configuration flags for the surface

This adds precise DEPTH, STENCIL and MSAA configurations.

@feature

2 files changed, 68 insertions, 14 deletions

diff --git a/src/lib/elm_glview.c b/src/lib/elm_glview.c
index 20216c869..7d2a236f9 100644
--- a/src/lib/elm_glview.c
+++ b/src/lib/elm_glview.c
@@ -301,22 +301,59 @@ _elm_glview_mode_set(Eo *obj, Elm_Glview_Data *sd, Elm_GLView_Mode mode)
    if (mode & ELM_GLVIEW_ALPHA) sd->config->color_format = EVAS_GL_RGBA_8888;
    else sd->config->color_format = EVAS_GL_RGB_888;
 
-   if (mode & ELM_GLVIEW_DEPTH) sd->config->depth_bits = EVAS_GL_DEPTH_BIT_24;
-   else sd->config->depth_bits = EVAS_GL_DEPTH_NONE;
+   if (mode & ELM_GLVIEW_DEPTH)
+     {
+        const int mask = 7 << 6;
+        if ((mode & mask) == (ELM_GLVIEW_DEPTH_8 & mask))
+          sd->config->depth_bits = EVAS_GL_DEPTH_BIT_8;
+        else if ((mode & mask) == (ELM_GLVIEW_DEPTH_16 & mask))
+          sd->config->depth_bits = EVAS_GL_DEPTH_BIT_16;
+        else if ((mode & mask) == (ELM_GLVIEW_DEPTH_24 & mask))
+          sd->config->depth_bits = EVAS_GL_DEPTH_BIT_24;
+        else if ((mode & mask) == (ELM_GLVIEW_DEPTH_32 & mask))
+          sd->config->depth_bits = EVAS_GL_DEPTH_BIT_32;
+        else
+          sd->config->depth_bits = EVAS_GL_DEPTH_BIT_24;
+     }
+   else
+     sd->config->depth_bits = EVAS_GL_DEPTH_NONE;
 
    if (mode & ELM_GLVIEW_STENCIL)
-     sd->config->stencil_bits = EVAS_GL_STENCIL_BIT_8;
-   else sd->config->stencil_bits = EVAS_GL_STENCIL_NONE;
+     {
+        const int mask = 7 << 9;
+        if ((mode & mask) == (ELM_GLVIEW_STENCIL_1 & mask))
+          sd->config->stencil_bits = EVAS_GL_STENCIL_BIT_1;
+        else if ((mode & mask) == (ELM_GLVIEW_STENCIL_1 & mask))
+          sd->config->stencil_bits = EVAS_GL_STENCIL_BIT_2;
+        else if ((mode & mask) == (ELM_GLVIEW_STENCIL_4 & mask))
+          sd->config->stencil_bits = EVAS_GL_STENCIL_BIT_4;
+        else if ((mode & mask) == (ELM_GLVIEW_STENCIL_8 & mask))
+          sd->config->stencil_bits = EVAS_GL_STENCIL_BIT_8;
+        else if ((mode & mask) == (ELM_GLVIEW_STENCIL_16 & mask))
+          sd->config->stencil_bits = EVAS_GL_STENCIL_BIT_16;
+        else
+          sd->config->stencil_bits = EVAS_GL_STENCIL_BIT_8;
+     }
+   else
+     sd->config->stencil_bits = EVAS_GL_STENCIL_NONE;
 
+   if (mode & ELM_GLVIEW_MULTISAMPLE_HIGH)
+     {
+        if ((mode & ELM_GLVIEW_MULTISAMPLE_HIGH) == ELM_GLVIEW_MULTISAMPLE_LOW)
+          sd->config->multisample_bits = EVAS_GL_MULTISAMPLE_LOW;
+        else if ((mode & ELM_GLVIEW_MULTISAMPLE_HIGH) == ELM_GLVIEW_MULTISAMPLE_MED)
+          sd->config->multisample_bits = EVAS_GL_MULTISAMPLE_MED;
+        else
+          sd->config->multisample_bits = EVAS_GL_MULTISAMPLE_HIGH;
+     }
+   else
+     sd->config->multisample_bits = EVAS_GL_MULTISAMPLE_NONE;
+
+   sd->config->options_bits = EVAS_GL_OPTIONS_NONE;
    if (mode & ELM_GLVIEW_DIRECT)
      sd->config->options_bits = EVAS_GL_OPTIONS_DIRECT;
-   else sd->config->options_bits = EVAS_GL_OPTIONS_NONE;
-
-   // Check for Alpha Channel and enable it
-   if (mode & ELM_GLVIEW_ALPHA)
-     evas_object_image_alpha_set(wd->resize_obj, EINA_TRUE);
-   else
-     evas_object_image_alpha_set(wd->resize_obj, EINA_FALSE);
+   if (mode & ELM_GLVIEW_CLIENT_SIDE_ROTATION)
+     sd->config->options_bits |= EVAS_GL_OPTIONS_CLIENT_SIDE_ROTATION;
 
    sd->mode = mode;
 
diff --git a/src/lib/elm_glview_common.h b/src/lib/elm_glview_common.h
index 0417b9e5b..7e6dc9663 100644
--- a/src/lib/elm_glview_common.h
+++ b/src/lib/elm_glview_common.h
@@ -8,10 +8,27 @@ typedef void (*Elm_GLView_Func_Cb)(Evas_Object *obj);
 typedef enum _Elm_GLView_Mode
 {
    ELM_GLVIEW_NONE    = 0,
+   // 0x1 is reserved for future use
    ELM_GLVIEW_ALPHA   = (1<<1), /**< Alpha channel enabled rendering mode */
-   ELM_GLVIEW_DEPTH   = (1<<2), /**< Depth buffer enabled rendering mode */
-   ELM_GLVIEW_STENCIL = (1<<3), /**< Stencil buffer enabled rendering mode */
-   ELM_GLVIEW_DIRECT  = (1<<4)  /**< Direct rendering optimization hint */
+   ELM_GLVIEW_DEPTH   = (1<<2), /**< Depth buffer enabled rendering mode (24 bits by default) */
+   ELM_GLVIEW_STENCIL = (1<<3), /**< Stencil buffer enabled rendering mode (8 bits by default) */
+   ELM_GLVIEW_DIRECT  = (1<<4), /**< Request direct rendering, unless there must be a fallback */
+   ELM_GLVIEW_CLIENT_SIDE_ROTATION = (1<<5), /**< Client will handle GL view rotation if direct rendering is enabled */
+   // Depth buffer sizes (3 bits)
+   ELM_GLVIEW_DEPTH_8  = ELM_GLVIEW_DEPTH | (1 << 6), /**< Request min. 8 bits for the depth buffer */
+   ELM_GLVIEW_DEPTH_16 = ELM_GLVIEW_DEPTH | (2 << 6), /**< Request min. 16 bits for the depth buffer */
+   ELM_GLVIEW_DEPTH_24 = ELM_GLVIEW_DEPTH | (3 << 6), /**< Request min. 24 bits for the depth buffer (default) */
+   ELM_GLVIEW_DEPTH_32 = ELM_GLVIEW_DEPTH | (4 << 6), /**< Request min. 32 bits for the depth buffer */
+   // Stencil buffer sizes (3 bits)
+   ELM_GLVIEW_STENCIL_1  = ELM_GLVIEW_STENCIL | (1 << 9), /**< Request min. 1 bits for the stencil buffer */
+   ELM_GLVIEW_STENCIL_2  = ELM_GLVIEW_STENCIL | (2 << 9), /**< Request min. 2 bits for the stencil buffer */
+   ELM_GLVIEW_STENCIL_4  = ELM_GLVIEW_STENCIL | (3 << 9), /**< Request min. 4 bits for the stencil buffer */
+   ELM_GLVIEW_STENCIL_8  = ELM_GLVIEW_STENCIL | (4 << 9), /**< Request min. 8 bits for the stencil buffer (default) */
+   ELM_GLVIEW_STENCIL_16 = ELM_GLVIEW_STENCIL | (5 << 9), /**< Request min. 16 bits for the stencil buffer */
+   // MSAA params (2 bits)
+   ELM_GLVIEW_MULTISAMPLE_LOW  = (1 << 12), /**< MSAA with minimum number of samples */
+   ELM_GLVIEW_MULTISAMPLE_MED  = (2 << 12), /**< MSAA with half the number of maximum samples */
+   ELM_GLVIEW_MULTISAMPLE_HIGH = (3 << 12)  /**< MSAA with maximum number of samples */
 } Elm_GLView_Mode;
 
 /**