From b1fa6d7ee3c887dc7f5f493d1c5df87043860ce8 Mon Sep 17 00:00:00 2001
From: raster <raster@7cbeb6ba-43b4-40fd-8cce-4c39aea84d33>
Date: Sun, 13 Dec 2009 14:28:07 +0000
Subject: [PATCH] clip maps in gl enigne.

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/evas@44424 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33
---
 src/modules/engines/gl_common/evas_gl_common.h  |  4 +++
 src/modules/engines/gl_common/evas_gl_context.c | 46 +++++++++++++++++++++++++
 2 files changed, 50 insertions(+)

diff --git a/src/modules/engines/gl_common/evas_gl_common.h b/src/modules/engines/gl_common/evas_gl_common.h
index d0f0bd4..f8f7777 100644
--- a/src/modules/engines/gl_common/evas_gl_common.h
+++ b/src/modules/engines/gl_common/evas_gl_common.h
@@ -114,14 +114,18 @@ struct _Evas_GL_Context
       GLuint          cur_prog;
       GLuint          cur_tex, cur_texu, cur_texv;
       int             render_op;
+      int             cx, cy, cw, ch;
       Eina_Bool       smooth : 1;
       Eina_Bool       blend : 1;
+      Eina_Bool       clip : 1;
       struct {
          GLuint          cur_prog;
          GLuint          cur_tex, cur_texum, cur_texv;
          int             render_op;
+         int             cx, cy, cw, ch;
          Eina_Bool       smooth : 1;
          Eina_Bool       blend : 1;
+         Eina_Bool       clip : 1;
       } current;
    } shader;
    struct {
diff --git a/src/modules/engines/gl_common/evas_gl_context.c b/src/modules/engines/gl_common/evas_gl_context.c
index aa51cc0..0dd5779 100644
--- a/src/modules/engines/gl_common/evas_gl_context.c
+++ b/src/modules/engines/gl_common/evas_gl_context.c
@@ -411,6 +411,7 @@ evas_gl_common_context_rectangle_push(Evas_GL_Context *gc,
        || (gc->shader.cur_prog != gc->shared->shader.rect.prog)
        || (gc->shader.blend != blend)
        || (gc->shader.render_op != gc->dc->render_op)
+       || (gc->shader.clip != 0)
        )
      {
         shader_array_flush(gc);
@@ -418,6 +419,7 @@ evas_gl_common_context_rectangle_push(Evas_GL_Context *gc,
         gc->shader.cur_prog = gc->shared->shader.rect.prog;
         gc->shader.blend = blend;
         gc->shader.render_op = gc->dc->render_op;
+        gc->shader.clip = 0;
      }
    
    pnum = gc->array.num;
@@ -463,6 +465,7 @@ evas_gl_common_context_image_push(Evas_GL_Context *gc,
        || (gc->shader.smooth != smooth)
        || (gc->shader.blend != blend)
        || (gc->shader.render_op != gc->dc->render_op)
+       || (gc->shader.clip != 0)
        )
      {
         shader_array_flush(gc);
@@ -471,6 +474,7 @@ evas_gl_common_context_image_push(Evas_GL_Context *gc,
         gc->shader.smooth = smooth;
         gc->shader.blend = blend;
         gc->shader.render_op = gc->dc->render_op;
+        gc->shader.clip = 0;
      }
    
    pnum = gc->array.num;
@@ -520,6 +524,7 @@ evas_gl_common_context_font_push(Evas_GL_Context *gc,
        || (gc->shader.smooth != 0)
        || (gc->shader.blend != 1)
        || (gc->shader.render_op != gc->dc->render_op)
+       || (gc->shader.clip != 0)
        )
      {
         shader_array_flush(gc);
@@ -528,6 +533,7 @@ evas_gl_common_context_font_push(Evas_GL_Context *gc,
         gc->shader.smooth = 0;
         gc->shader.blend = 1;
         gc->shader.render_op = gc->dc->render_op;
+        gc->shader.clip = 0;
      }
    
    pnum = gc->array.num;
@@ -591,6 +597,7 @@ evas_gl_common_context_yuv_push(Evas_GL_Context *gc,
        || (gc->shader.smooth != smooth)
        || (gc->shader.blend != blend)
        || (gc->shader.render_op != gc->dc->render_op)
+       || (gc->shader.clip != 0)
        )
      {
         shader_array_flush(gc);
@@ -601,6 +608,7 @@ evas_gl_common_context_yuv_push(Evas_GL_Context *gc,
         gc->shader.smooth = smooth;
         gc->shader.blend = blend;
         gc->shader.render_op = gc->dc->render_op;
+        gc->shader.clip = 0;
      }
    
    pnum = gc->array.num;
@@ -683,6 +691,11 @@ evas_gl_common_context_image_map4_push(Evas_GL_Context *gc,
        || (gc->shader.smooth != smooth)
        || (gc->shader.blend != blend)
        || (gc->shader.render_op != gc->dc->render_op)
+       || (gc->shader.clip != clip)
+       || (gc->shader.cx != cx)
+       || (gc->shader.cy != cy)
+       || (gc->shader.cw != cw)
+       || (gc->shader.ch != ch)
        )
      {
         shader_array_flush(gc);
@@ -694,6 +707,11 @@ evas_gl_common_context_image_map4_push(Evas_GL_Context *gc,
         gc->shader.smooth = smooth;
         gc->shader.blend = blend;
         gc->shader.render_op = gc->dc->render_op;
+        gc->shader.clip = clip;
+        gc->shader.cx = cx;
+        gc->shader.cy = cy;
+        gc->shader.cw = cw;
+        gc->shader.ch = ch;
      }
    
    pnum = gc->array.num;
@@ -804,6 +822,29 @@ shader_array_flush(Evas_GL_Context *gc)
              glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
           }
      }
+   if (gc->shader.clip != gc->shader.current.clip)
+     {
+        if (gc->shader.clip)
+          glEnable(GL_SCISSOR_TEST);
+        else
+          glDisable(GL_SCISSOR_TEST);
+     }
+   if (gc->shader.clip)
+     {
+        if ((gc->shader.cx != gc->shader.current.cx) ||
+            (gc->shader.cx != gc->shader.current.cx) ||
+            (gc->shader.cx != gc->shader.current.cx) ||
+            (gc->shader.cx != gc->shader.current.cx))
+          glScissor(gc->shader.cx, 
+                    gc->h - gc->shader.cy - gc->shader.ch,
+                    gc->shader.cw,
+                    gc->shader.ch);
+//                    gc->clip.x,
+//                    gc->h - gc->clip.y - gc->clip.h,
+//                    gc->clip.w,
+//                    gc->clip.h);
+        
+     }
 
    glVertexAttribPointer(SHAD_VERTEX, 3, GL_SHORT, GL_FALSE, 0, gc->array.vertex);
    glVertexAttribPointer(SHAD_COLOR, 4, GL_UNSIGNED_BYTE, GL_TRUE, 0, gc->array.color);
@@ -832,6 +873,11 @@ shader_array_flush(Evas_GL_Context *gc)
    gc->shader.current.blend = gc->shader.blend;
    gc->shader.current.smooth = gc->shader.smooth;
    gc->shader.current.render_op = gc->shader.render_op;
+   gc->shader.current.clip = gc->shader.clip;
+   gc->shader.current.cx = gc->shader.cx;
+   gc->shader.current.cy = gc->shader.cy;
+   gc->shader.current.cw = gc->shader.cw;
+   gc->shader.current.ch = gc->shader.ch;
    
    free(gc->array.vertex);
    free(gc->array.color);
-- 
2.7.4