vo_gl3: support RGBA EOSD

This also adds support for multiple EOSD renderers. This capability is
unused yet, but important for the following commits.

1 files changed, 26 insertions, 0 deletions

diff --git a/libvo/gl_common.c b/libvo/gl_common.c
index 1ad7017e10..c56b0c8ffc 100644
--- a/libvo/gl_common.c
+++ b/libvo/gl_common.c
@@ -427,6 +427,7 @@ static const extfunc_desc_t extfuncs[] = {
     DEF_GL3_DESC(FramebufferTexture2D),
     DEF_GL3_DESC(Uniform1f),
     DEF_GL3_DESC(Uniform3f),
+    DEF_GL3_DESC(Uniform4f),
     DEF_GL3_DESC(Uniform1i),
     DEF_GL3_DESC(UniformMatrix3fv),
     DEF_GL3_DESC(UniformMatrix4x3fv),
@@ -674,6 +675,31 @@ void glUploadTex(GL *gl, GLenum target, GLenum format, GLenum type,
         gl->TexSubImage2D(target, 0, x, y, w, y_max - y, format, type, data);
 }
 
+// Like glUploadTex, but upload a byte array with all elements set to val.
+// If scratch is not NULL, points to a resizeable talloc memory block than can
+// be freely used by the function (for avoiding temporary memory allocations).
+void glClearTex(GL *gl, GLenum target, GLenum format, GLenum type,
+                int x, int y, int w, int h, uint8_t val, void **scratch)
+{
+    int bpp = glFmt2bpp(format, type);
+    int stride = w * bpp;
+    int size = h * stride;
+    if (size < 1)
+        return;
+    void *data = scratch ? *scratch : NULL;
+    if (talloc_get_size(data) < size)
+        data = talloc_realloc(NULL, data, char *, size);
+    memset(data, val, size);
+    glAdjustAlignment(gl, stride);
+    gl->PixelStorei(GL_UNPACK_ROW_LENGTH, w);
+    gl->TexSubImage2D(target, 0, x, y, w, h, format, type, data);
+    if (scratch) {
+        *scratch = data;
+    } else {
+        talloc_free(data);
+    }
+}
+
 /**
  * \brief download a texture, handling things like stride and slices
  * \param target texture target, usually GL_TEXTURE_2D