[gtk/wip/otte/gl-hdr: 5/7] gdk: Remove unused gdk_gl_texture_quads() function

[Benjamin Otte <otte src gnome org>]

commit f3023eed1630290733501f7cee6dfade59bd65dc
Author: Benjamin Otte <otte redhat com>
Date:   Wed Oct 6 01:26:36 2021 +0200

    gdk: Remove unused gdk_gl_texture_quads() function
    
    That function carried a lot of baggage.

 gdk/gdkgl.c                                 | 260 ----------------------------
 gdk/gdkglcontextprivate.h                   |  11 --
 gdk/gen-gdk-gresources-xml.py               |   3 -
 gdk/resources/glsl/gl2-texture-2d.fs.glsl   |   9 -
 gdk/resources/glsl/gl2-texture-2d.vs.glsl   |  11 --
 gdk/resources/glsl/gl2-texture-rect.fs.glsl |   9 -
 gdk/resources/glsl/gl2-texture-rect.vs.glsl |  11 --
 gdk/resources/glsl/gl3-texture-2d.fs.glsl   |  11 --
 gdk/resources/glsl/gl3-texture-2d.vs.glsl   |  11 --
 gdk/resources/glsl/gl3-texture-rect.fs.glsl |   9 -
 gdk/resources/glsl/gl3-texture-rect.vs.glsl |  11 --
 gdk/resources/glsl/gles2-texture.fs.glsl    |  16 --
 gdk/resources/glsl/gles2-texture.vs.glsl    |  10 --
 13 files changed, 382 deletions(-)
---
diff --git a/gdk/gdkgl.c b/gdk/gdkgl.c
index f5052f5ca0..2a7a30fd7c 100644
--- a/gdk/gdkgl.c
+++ b/gdk/gdkgl.c
@@ -26,265 +26,6 @@
 #include <math.h>
 #include <string.h>
 
-static const char *
-get_shader_type_name (int type)
-{
-  switch (type)
-    {
-    case GL_VERTEX_SHADER:
-      return "vertex";
-    case GL_GEOMETRY_SHADER:
-      return "geometry";
-    case GL_FRAGMENT_SHADER:
-      return "fragment";
-    default:
-      return "unknown";
-    }
-}
-
-static guint
-create_shader (int         type,
-               const char *code)
-{
-  guint shader;
-  int status;
-
-  shader = glCreateShader (type);
-  glShaderSource (shader, 1, &code, NULL);
-  glCompileShader (shader);
-
-  glGetShaderiv (shader, GL_COMPILE_STATUS, &status);
-  if (status == GL_FALSE)
-    {
-      int log_len;
-      char *buffer;
-
-      glGetShaderiv (shader, GL_INFO_LOG_LENGTH, &log_len);
-
-      buffer = g_malloc (log_len + 1);
-      glGetShaderInfoLog (shader, log_len, NULL, buffer);
-
-      g_warning ("Compile failure in %s shader:\n%s", get_shader_type_name (type), buffer);
-      g_free (buffer);
-
-      glDeleteShader (shader);
-
-      return 0;
-    }
-
-  return shader;
-}
-
-static void
-make_program (GdkGLContextProgram *program,
-              const char          *vertex_shader_path,
-              const char          *fragment_shader_path)
-{
-  guint vertex_shader, fragment_shader;
-  GBytes *source;
-  int status;
-
-  source = g_resources_lookup_data (vertex_shader_path, 0, NULL);
-  g_assert (source != NULL);
-  vertex_shader = create_shader (GL_VERTEX_SHADER, g_bytes_get_data (source, NULL));
-  g_bytes_unref (source);
-  if (vertex_shader == 0)
-    return;
-
-  source = g_resources_lookup_data (fragment_shader_path, 0, NULL);
-  g_assert (source != NULL);
-  fragment_shader = create_shader (GL_FRAGMENT_SHADER, g_bytes_get_data (source, NULL));
-  g_bytes_unref (source);
-  if (fragment_shader == 0)
-    {
-      glDeleteShader (vertex_shader);
-      return;
-    }
-
-  program->program = glCreateProgram ();
-  glAttachShader (program->program, vertex_shader);
-  glAttachShader (program->program, fragment_shader);
-
-  glLinkProgram (program->program);
-
-  glDetachShader (program->program, vertex_shader);
-  glDetachShader (program->program, fragment_shader);
-
-  glDeleteShader (vertex_shader);
-  glDeleteShader (fragment_shader);
-
-  glGetProgramiv (program->program, GL_LINK_STATUS, &status);
-  if (status == GL_FALSE)
-    {
-      int log_len;
-      char *buffer;
-
-      glGetProgramiv (program->program, GL_INFO_LOG_LENGTH, &log_len);
-
-      buffer = g_malloc (log_len + 1);
-      glGetProgramInfoLog (program->program, log_len, NULL, buffer);
-      g_warning ("Linker failure: %s\n", buffer);
-      g_free (buffer);
-
-      glDeleteProgram (program->program);
-    }
-
-  program->position_location = glGetAttribLocation (program->program, "position");
-  program->uv_location = glGetAttribLocation (program->program, "uv");
-  program->map_location = glGetUniformLocation (program->program, "map");
-  program->flip_location = glGetUniformLocation (program->program, "flipColors");
-}
-
-static void
-bind_vao (GdkGLContextPaintData *paint_data)
-{
-  if (paint_data->vertex_array_object == 0)
-    {
-      glGenVertexArrays (1, &paint_data->vertex_array_object);
-      /* ATM we only use one VAO, so always bind it */
-      glBindVertexArray (paint_data->vertex_array_object);
-    }
-}
-
-static void
-use_texture_gles_program (GdkGLContextPaintData *paint_data)
-{
-  if (paint_data->texture_2d_quad_program.program == 0)
-    make_program (&paint_data->texture_2d_quad_program,
-                  "/org/gtk/libgdk/glsl/gles2-texture.vs.glsl",
-                  "/org/gtk/libgdk/glsl/gles2-texture.fs.glsl");
-
-  if (paint_data->current_program != &paint_data->texture_2d_quad_program)
-    {
-      paint_data->current_program = &paint_data->texture_2d_quad_program;
-      glUseProgram (paint_data->current_program->program);
-    }
-}
-
-static void
-use_texture_2d_program (GdkGLContextPaintData *paint_data)
-{
-  const char *vertex_shader_path = paint_data->is_legacy
-    ? "/org/gtk/libgdk/glsl/gl2-texture-2d.vs.glsl"
-    : "/org/gtk/libgdk/glsl/gl3-texture-2d.vs.glsl";
-
-  const char *fragment_shader_path = paint_data->is_legacy
-    ? "/org/gtk/libgdk/glsl/gl2-texture-2d.fs.glsl"
-    : "/org/gtk/libgdk/glsl/gl3-texture-2d.fs.glsl";
-
-  if (paint_data->texture_2d_quad_program.program == 0)
-    make_program (&paint_data->texture_2d_quad_program, vertex_shader_path, fragment_shader_path);
-
-  if (paint_data->current_program != &paint_data->texture_2d_quad_program)
-    {
-      paint_data->current_program = &paint_data->texture_2d_quad_program;
-      glUseProgram (paint_data->current_program->program);
-    }
-}
-
-static void
-use_texture_rect_program (GdkGLContextPaintData *paint_data)
-{
-  const char *vertex_shader_path = paint_data->is_legacy
-    ? "/org/gtk/libgdk/glsl/gl2-texture-rect.vs.glsl"
-    : "/org/gtk/libgdk/glsl/gl3-texture-rect.vs.glsl";
-
-  const char *fragment_shader_path = paint_data->is_legacy
-    ? "/org/gtk/libgdk/glsl/gl2-texture-rect.fs.glsl"
-    : "/org/gtk/libgdk/glsl/gl3-texture-rect.vs.glsl";
-
-  if (paint_data->texture_rect_quad_program.program == 0)
-    make_program (&paint_data->texture_rect_quad_program, vertex_shader_path, fragment_shader_path);
-
-  if (paint_data->current_program != &paint_data->texture_rect_quad_program)
-    {
-      paint_data->current_program = &paint_data->texture_rect_quad_program;
-      glUseProgram (paint_data->current_program->program);
-    }
-}
-
-void
-gdk_gl_texture_quads (GdkGLContext *paint_context,
-                      guint texture_target,
-                      int n_quads,
-                      GdkTexturedQuad *quads,
-                      gboolean flip_colors)
-{
-  GdkGLContextPaintData *paint_data  = gdk_gl_context_get_paint_data (paint_context);
-  GdkGLContextProgram *program;
-  GdkSurface *surface = gdk_gl_context_get_surface (paint_context);
-  int surface_scale = gdk_surface_get_scale_factor (surface);
-  float w = gdk_surface_get_width (surface) * surface_scale;
-  float h = gdk_surface_get_height (surface) * surface_scale;
-  int i;
-  float *vertex_buffer_data;
-
-  bind_vao (paint_data);
-
-  if (paint_data->tmp_vertex_buffer == 0)
-    glGenBuffers(1, &paint_data->tmp_vertex_buffer);
-
-  if (paint_data->use_es)
-    use_texture_gles_program (paint_data);
-  else
-    {
-      if (texture_target == GL_TEXTURE_RECTANGLE_ARB)
-        use_texture_rect_program (paint_data);
-      else
-        use_texture_2d_program (paint_data);
-    }
-
-  program = paint_data->current_program;
-
-  /* Use texture unit 0 */
-  glActiveTexture (GL_TEXTURE0);
-  glUniform1i(program->map_location, 0);
-
-  /* Flip 'R' and 'B' colors on GLES, if necessary */
-  if (gdk_gl_context_get_use_es (paint_context))
-    glUniform1i (program->flip_location, flip_colors ? 1 : 0);
-
-  glEnableVertexAttribArray (program->position_location);
-  glEnableVertexAttribArray (program->uv_location);
-  glBindBuffer (GL_ARRAY_BUFFER, paint_data->tmp_vertex_buffer);
-
-  glVertexAttribPointer (program->position_location, 2, GL_FLOAT, GL_FALSE, sizeof(float) * 4, NULL);
-  glVertexAttribPointer (program->uv_location, 2, GL_FLOAT, GL_FALSE, sizeof(float) * 4, (void *) 
(sizeof(float) * 2));
-
-#define VERTEX_SIZE 4
-
-#define QUAD_N_VERTICES 6
-
-#define QUAD_SIZE (VERTEX_SIZE * QUAD_N_VERTICES)
-
-  vertex_buffer_data = g_new (float, n_quads * QUAD_SIZE);
-
-  for (i = 0; i < n_quads; i++)
-    {
-      GdkTexturedQuad *quad = &quads[i];
-      float vertex_data[] = {
-        (quad->x1 * 2) / w - 1, (quad->y1 * 2) / h - 1, quad->u1, quad->v1,
-        (quad->x1 * 2) / w - 1, (quad->y2 * 2) / h - 1, quad->u1, quad->v2,
-        (quad->x2 * 2) / w - 1, (quad->y1 * 2) / h - 1, quad->u2, quad->v1,
-
-        (quad->x2 * 2) / w - 1, (quad->y2 * 2) / h - 1, quad->u2, quad->v2,
-        (quad->x1 * 2) / w - 1, (quad->y2 * 2) / h - 1, quad->u1, quad->v2,
-        (quad->x2 * 2) / w - 1, (quad->y1 * 2) / h - 1, quad->u2, quad->v1,
-      };
-
-      float *vertex = &vertex_buffer_data[i * QUAD_SIZE];
-      memcpy (vertex, vertex_data, sizeof(vertex_data));
-    }
-
-  glBufferData (GL_ARRAY_BUFFER, sizeof(float) * n_quads * QUAD_SIZE, vertex_buffer_data, GL_STREAM_DRAW);
-  glDrawArrays (GL_TRIANGLES, 0, n_quads * QUAD_N_VERTICES);
-
-  g_free (vertex_buffer_data);
-
-  glDisableVertexAttribArray (program->position_location);
-  glDisableVertexAttribArray (program->uv_location);
-}
-
 /* x,y,width,height describes a rectangle in the gl render buffer
    coordinate space, and its top left corner is drawn at the current
    position according to the cairo translation. */
@@ -341,7 +82,6 @@ gdk_cairo_draw_from_gl (cairo_t              *cr,
   cairo_surface_t *image;
   guint framebuffer;
   int alpha_size = 0;
-  GdkGLContextPaintData *paint_data;
   int major, minor, version;
   gboolean es_use_bgra = FALSE;
 
diff --git a/gdk/gdkglcontextprivate.h b/gdk/gdkglcontextprivate.h
index 050e757608..120e064e76 100644
--- a/gdk/gdkglcontextprivate.h
+++ b/gdk/gdkglcontextprivate.h
@@ -135,17 +135,6 @@ gboolean                gdk_gl_context_has_debug                (GdkGLContext
 
 gboolean                gdk_gl_context_use_es_bgra              (GdkGLContext    *context);
 
-typedef struct {
-  float x1, y1, x2, y2;
-  float u1, v1, u2, v2;
-} GdkTexturedQuad;
-
-void                    gdk_gl_texture_quads                    (GdkGLContext    *context,
-                                                                 guint            texture_target,
-                                                                 int              n_quads,
-                                                                 GdkTexturedQuad *quads,
-                                                                 gboolean         flip_colors);
-
 
 G_END_DECLS
 
diff --git a/gdk/gen-gdk-gresources-xml.py b/gdk/gen-gdk-gresources-xml.py
index bc0e541919..453bbee934 100644
--- a/gdk/gen-gdk-gresources-xml.py
+++ b/gdk/gen-gdk-gresources-xml.py
@@ -31,9 +31,6 @@ xml = '''<?xml version='1.0' encoding='UTF-8'?>
 def get_files(subdir,extension):
   return sorted(filter(lambda x: x.endswith((extension)), os.listdir(os.path.join(srcdir,subdir))))
 
-for f in get_files('resources/glsl', '.glsl'):
-  xml += '    <file alias=\'glsl/{0}\'>resources/glsl/{0}</file>\n'.format(f)
-
 xml += '''
   </gresource>
 </gresources>'''